diff options
Diffstat (limited to 'mesalib/src/mesa/main/ff_fragment_shader.cpp')
| -rw-r--r-- | mesalib/src/mesa/main/ff_fragment_shader.cpp | 3236 |
1 files changed, 1618 insertions, 1618 deletions
diff --git a/mesalib/src/mesa/main/ff_fragment_shader.cpp b/mesalib/src/mesa/main/ff_fragment_shader.cpp index 0b53c28f7..562a37b81 100644 --- a/mesalib/src/mesa/main/ff_fragment_shader.cpp +++ b/mesalib/src/mesa/main/ff_fragment_shader.cpp @@ -1,1618 +1,1618 @@ -/************************************************************************** - * - * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. - * All Rights Reserved. - * Copyright 2009 VMware, Inc. All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the - * "Software"), to deal in the Software without restriction, including - * without limitation the rights to use, copy, modify, merge, publish, - * distribute, sub license, and/or sell copies of the Software, and to - * permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice (including the - * next paragraph) shall be included in all copies or substantial portions - * of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. - * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR - * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, - * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE - * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - * - **************************************************************************/ - -extern "C" { -#include "glheader.h" -#include "imports.h" -#include "mtypes.h" -#include "program/program.h" -#include "program/prog_parameter.h" -#include "program/prog_cache.h" -#include "program/prog_instruction.h" -#include "program/prog_print.h" -#include "program/prog_statevars.h" -#include "program/programopt.h" -#include "texenvprogram.h" -} - -/* - * Note on texture units: - * - * The number of texture units supported by fixed-function fragment - * processing is MAX_TEXTURE_COORD_UNITS, not MAX_TEXTURE_IMAGE_UNITS. - * That's because there's a one-to-one correspondence between texture - * coordinates and samplers in fixed-function processing. - * - * Since fixed-function vertex processing is limited to MAX_TEXTURE_COORD_UNITS - * sets of texcoords, so is fixed-function fragment processing. - * - * We can safely use ctx->Const.MaxTextureUnits for loop bounds. - */ - - -struct texenvprog_cache_item -{ - GLuint hash; - void *key; - struct gl_fragment_program *data; - struct texenvprog_cache_item *next; -}; - -static GLboolean -texenv_doing_secondary_color(struct gl_context *ctx) -{ - if (ctx->Light.Enabled && - (ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) - return GL_TRUE; - - if (ctx->Fog.ColorSumEnabled) - return GL_TRUE; - - return GL_FALSE; -} - -/** - * Up to nine instructions per tex unit, plus fog, specular color. - */ -#define MAX_INSTRUCTIONS ((MAX_TEXTURE_COORD_UNITS * 9) + 12) - -#define DISASSEM (MESA_VERBOSE & VERBOSE_DISASSEM) - -struct mode_opt { -#ifdef __GNUC__ - __extension__ GLubyte Source:4; /**< SRC_x */ - __extension__ GLubyte Operand:3; /**< OPR_x */ -#else - GLubyte Source; /**< SRC_x */ - GLubyte Operand; /**< OPR_x */ -#endif -}; - -struct state_key { - GLuint nr_enabled_units:8; - GLuint enabled_units:8; - GLuint separate_specular:1; - GLuint fog_enabled:1; - GLuint fog_mode:2; /**< FOG_x */ - GLuint inputs_available:12; - GLuint num_draw_buffers:4; - - /* NOTE: This array of structs must be last! (see "keySize" below) */ - struct { - GLuint enabled:1; - GLuint source_index:3; /**< TEXTURE_x_INDEX */ - GLuint shadow:1; - GLuint ScaleShiftRGB:2; - GLuint ScaleShiftA:2; - - GLuint NumArgsRGB:3; /**< up to MAX_COMBINER_TERMS */ - GLuint ModeRGB:5; /**< MODE_x */ - - GLuint NumArgsA:3; /**< up to MAX_COMBINER_TERMS */ - GLuint ModeA:5; /**< MODE_x */ - - GLuint texture_cyl_wrap:1; /**< For gallium test/debug only */ - - struct mode_opt OptRGB[MAX_COMBINER_TERMS]; - struct mode_opt OptA[MAX_COMBINER_TERMS]; - } unit[MAX_TEXTURE_UNITS]; -}; - -#define FOG_LINEAR 0 -#define FOG_EXP 1 -#define FOG_EXP2 2 -#define FOG_UNKNOWN 3 - -static GLuint translate_fog_mode( GLenum mode ) -{ - switch (mode) { - case GL_LINEAR: return FOG_LINEAR; - case GL_EXP: return FOG_EXP; - case GL_EXP2: return FOG_EXP2; - default: return FOG_UNKNOWN; - } -} - -#define OPR_SRC_COLOR 0 -#define OPR_ONE_MINUS_SRC_COLOR 1 -#define OPR_SRC_ALPHA 2 -#define OPR_ONE_MINUS_SRC_ALPHA 3 -#define OPR_ZERO 4 -#define OPR_ONE 5 -#define OPR_UNKNOWN 7 - -static GLuint translate_operand( GLenum operand ) -{ - switch (operand) { - case GL_SRC_COLOR: return OPR_SRC_COLOR; - case GL_ONE_MINUS_SRC_COLOR: return OPR_ONE_MINUS_SRC_COLOR; - case GL_SRC_ALPHA: return OPR_SRC_ALPHA; - case GL_ONE_MINUS_SRC_ALPHA: return OPR_ONE_MINUS_SRC_ALPHA; - case GL_ZERO: return OPR_ZERO; - case GL_ONE: return OPR_ONE; - default: - assert(0); - return OPR_UNKNOWN; - } -} - -#define SRC_TEXTURE 0 -#define SRC_TEXTURE0 1 -#define SRC_TEXTURE1 2 -#define SRC_TEXTURE2 3 -#define SRC_TEXTURE3 4 -#define SRC_TEXTURE4 5 -#define SRC_TEXTURE5 6 -#define SRC_TEXTURE6 7 -#define SRC_TEXTURE7 8 -#define SRC_CONSTANT 9 -#define SRC_PRIMARY_COLOR 10 -#define SRC_PREVIOUS 11 -#define SRC_ZERO 12 -#define SRC_UNKNOWN 15 - -static GLuint translate_source( GLenum src ) -{ - switch (src) { - case GL_TEXTURE: return SRC_TEXTURE; - case GL_TEXTURE0: - case GL_TEXTURE1: - case GL_TEXTURE2: - case GL_TEXTURE3: - case GL_TEXTURE4: - case GL_TEXTURE5: - case GL_TEXTURE6: - case GL_TEXTURE7: return SRC_TEXTURE0 + (src - GL_TEXTURE0); - case GL_CONSTANT: return SRC_CONSTANT; - case GL_PRIMARY_COLOR: return SRC_PRIMARY_COLOR; - case GL_PREVIOUS: return SRC_PREVIOUS; - case GL_ZERO: - return SRC_ZERO; - default: - assert(0); - return SRC_UNKNOWN; - } -} - -#define MODE_REPLACE 0 /* r = a0 */ -#define MODE_MODULATE 1 /* r = a0 * a1 */ -#define MODE_ADD 2 /* r = a0 + a1 */ -#define MODE_ADD_SIGNED 3 /* r = a0 + a1 - 0.5 */ -#define MODE_INTERPOLATE 4 /* r = a0 * a2 + a1 * (1 - a2) */ -#define MODE_SUBTRACT 5 /* r = a0 - a1 */ -#define MODE_DOT3_RGB 6 /* r = a0 . a1 */ -#define MODE_DOT3_RGB_EXT 7 /* r = a0 . a1 */ -#define MODE_DOT3_RGBA 8 /* r = a0 . a1 */ -#define MODE_DOT3_RGBA_EXT 9 /* r = a0 . a1 */ -#define MODE_MODULATE_ADD_ATI 10 /* r = a0 * a2 + a1 */ -#define MODE_MODULATE_SIGNED_ADD_ATI 11 /* r = a0 * a2 + a1 - 0.5 */ -#define MODE_MODULATE_SUBTRACT_ATI 12 /* r = a0 * a2 - a1 */ -#define MODE_ADD_PRODUCTS 13 /* r = a0 * a1 + a2 * a3 */ -#define MODE_ADD_PRODUCTS_SIGNED 14 /* r = a0 * a1 + a2 * a3 - 0.5 */ -#define MODE_BUMP_ENVMAP_ATI 15 /* special */ -#define MODE_UNKNOWN 16 - -/** - * Translate GL combiner state into a MODE_x value - */ -static GLuint translate_mode( GLenum envMode, GLenum mode ) -{ - switch (mode) { - case GL_REPLACE: return MODE_REPLACE; - case GL_MODULATE: return MODE_MODULATE; - case GL_ADD: - if (envMode == GL_COMBINE4_NV) - return MODE_ADD_PRODUCTS; - else - return MODE_ADD; - case GL_ADD_SIGNED: - if (envMode == GL_COMBINE4_NV) - return MODE_ADD_PRODUCTS_SIGNED; - else - return MODE_ADD_SIGNED; - case GL_INTERPOLATE: return MODE_INTERPOLATE; - case GL_SUBTRACT: return MODE_SUBTRACT; - case GL_DOT3_RGB: return MODE_DOT3_RGB; - case GL_DOT3_RGB_EXT: return MODE_DOT3_RGB_EXT; - case GL_DOT3_RGBA: return MODE_DOT3_RGBA; - case GL_DOT3_RGBA_EXT: return MODE_DOT3_RGBA_EXT; - case GL_MODULATE_ADD_ATI: return MODE_MODULATE_ADD_ATI; - case GL_MODULATE_SIGNED_ADD_ATI: return MODE_MODULATE_SIGNED_ADD_ATI; - case GL_MODULATE_SUBTRACT_ATI: return MODE_MODULATE_SUBTRACT_ATI; - case GL_BUMP_ENVMAP_ATI: return MODE_BUMP_ENVMAP_ATI; - default: - assert(0); - return MODE_UNKNOWN; - } -} - - -/** - * Do we need to clamp the results of the given texture env/combine mode? - * If the inputs to the mode are in [0,1] we don't always have to clamp - * the results. - */ -static GLboolean -need_saturate( GLuint mode ) -{ - switch (mode) { - case MODE_REPLACE: - case MODE_MODULATE: - case MODE_INTERPOLATE: - return GL_FALSE; - case MODE_ADD: - case MODE_ADD_SIGNED: - case MODE_SUBTRACT: - case MODE_DOT3_RGB: - case MODE_DOT3_RGB_EXT: - case MODE_DOT3_RGBA: - case MODE_DOT3_RGBA_EXT: - case MODE_MODULATE_ADD_ATI: - case MODE_MODULATE_SIGNED_ADD_ATI: - case MODE_MODULATE_SUBTRACT_ATI: - case MODE_ADD_PRODUCTS: - case MODE_ADD_PRODUCTS_SIGNED: - case MODE_BUMP_ENVMAP_ATI: - return GL_TRUE; - default: - assert(0); - return GL_FALSE; - } -} - - - -/** - * Translate TEXTURE_x_BIT to TEXTURE_x_INDEX. - */ -static GLuint translate_tex_src_bit( GLbitfield bit ) -{ - ASSERT(bit); - return _mesa_ffs(bit) - 1; -} - - -#define VERT_BIT_TEX_ANY (0xff << VERT_ATTRIB_TEX0) -#define VERT_RESULT_TEX_ANY (0xff << VERT_RESULT_TEX0) - -/** - * Identify all possible varying inputs. The fragment program will - * never reference non-varying inputs, but will track them via state - * constants instead. - * - * This function figures out all the inputs that the fragment program - * has access to. The bitmask is later reduced to just those which - * are actually referenced. - */ -static GLbitfield get_fp_input_mask( struct gl_context *ctx ) -{ - /* _NEW_PROGRAM */ - const GLboolean vertexShader = - (ctx->Shader.CurrentVertexProgram && - ctx->Shader.CurrentVertexProgram->LinkStatus && - ctx->Shader.CurrentVertexProgram->VertexProgram); - const GLboolean vertexProgram = ctx->VertexProgram._Enabled; - GLbitfield fp_inputs = 0x0; - - if (ctx->VertexProgram._Overriden) { - /* Somebody's messing with the vertex program and we don't have - * a clue what's happening. Assume that it could be producing - * all possible outputs. - */ - fp_inputs = ~0; - } - else if (ctx->RenderMode == GL_FEEDBACK) { - /* _NEW_RENDERMODE */ - fp_inputs = (FRAG_BIT_COL0 | FRAG_BIT_TEX0); - } - else if (!(vertexProgram || vertexShader) || - !ctx->VertexProgram._Current) { - /* Fixed function vertex logic */ - /* _NEW_ARRAY */ - GLbitfield varying_inputs = ctx->varying_vp_inputs; - - /* These get generated in the setup routine regardless of the - * vertex program: - */ - /* _NEW_POINT */ - if (ctx->Point.PointSprite) - varying_inputs |= FRAG_BITS_TEX_ANY; - - /* First look at what values may be computed by the generated - * vertex program: - */ - /* _NEW_LIGHT */ - if (ctx->Light.Enabled) { - fp_inputs |= FRAG_BIT_COL0; - - if (texenv_doing_secondary_color(ctx)) - fp_inputs |= FRAG_BIT_COL1; - } - - /* _NEW_TEXTURE */ - fp_inputs |= (ctx->Texture._TexGenEnabled | - ctx->Texture._TexMatEnabled) << FRAG_ATTRIB_TEX0; - - /* Then look at what might be varying as a result of enabled - * arrays, etc: - */ - if (varying_inputs & VERT_BIT_COLOR0) - fp_inputs |= FRAG_BIT_COL0; - if (varying_inputs & VERT_BIT_COLOR1) - fp_inputs |= FRAG_BIT_COL1; - - fp_inputs |= (((varying_inputs & VERT_BIT_TEX_ANY) >> VERT_ATTRIB_TEX0) - << FRAG_ATTRIB_TEX0); - - } - else { - /* calculate from vp->outputs */ - struct gl_vertex_program *vprog; - GLbitfield64 vp_outputs; - - /* Choose GLSL vertex shader over ARB vertex program. Need this - * since vertex shader state validation comes after fragment state - * validation (see additional comments in state.c). - */ - if (vertexShader) - vprog = ctx->Shader.CurrentVertexProgram->VertexProgram; - else - vprog = ctx->VertexProgram.Current; - - vp_outputs = vprog->Base.OutputsWritten; - - /* These get generated in the setup routine regardless of the - * vertex program: - */ - /* _NEW_POINT */ - if (ctx->Point.PointSprite) - vp_outputs |= FRAG_BITS_TEX_ANY; - - if (vp_outputs & (1 << VERT_RESULT_COL0)) - fp_inputs |= FRAG_BIT_COL0; - if (vp_outputs & (1 << VERT_RESULT_COL1)) - fp_inputs |= FRAG_BIT_COL1; - - fp_inputs |= (((vp_outputs & VERT_RESULT_TEX_ANY) >> VERT_RESULT_TEX0) - << FRAG_ATTRIB_TEX0); - } - - return fp_inputs; -} - - -/** - * Examine current texture environment state and generate a unique - * key to identify it. - */ -static GLuint make_state_key( struct gl_context *ctx, struct state_key *key ) -{ - GLuint i, j; - GLbitfield inputs_referenced = FRAG_BIT_COL0; - const GLbitfield inputs_available = get_fp_input_mask( ctx ); - GLuint keySize; - - memset(key, 0, sizeof(*key)); - - /* _NEW_TEXTURE */ - for (i = 0; i < ctx->Const.MaxTextureUnits; i++) { - const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i]; - const struct gl_texture_object *texObj = texUnit->_Current; - const struct gl_tex_env_combine_state *comb = texUnit->_CurrentCombine; - GLenum format; - - if (!texUnit->_ReallyEnabled || !texUnit->Enabled) - continue; - - format = texObj->Image[0][texObj->BaseLevel]->_BaseFormat; - - key->unit[i].enabled = 1; - key->enabled_units |= (1<<i); - key->nr_enabled_units = i + 1; - inputs_referenced |= FRAG_BIT_TEX(i); - - key->unit[i].source_index = - translate_tex_src_bit(texUnit->_ReallyEnabled); - - key->unit[i].shadow = - ((texObj->Sampler.CompareMode == GL_COMPARE_R_TO_TEXTURE) && - ((format == GL_DEPTH_COMPONENT) || - (format == GL_DEPTH_STENCIL_EXT))); - - key->unit[i].NumArgsRGB = comb->_NumArgsRGB; - key->unit[i].NumArgsA = comb->_NumArgsA; - - key->unit[i].ModeRGB = - translate_mode(texUnit->EnvMode, comb->ModeRGB); - key->unit[i].ModeA = - translate_mode(texUnit->EnvMode, comb->ModeA); - - key->unit[i].ScaleShiftRGB = comb->ScaleShiftRGB; - key->unit[i].ScaleShiftA = comb->ScaleShiftA; - - for (j = 0; j < MAX_COMBINER_TERMS; j++) { - key->unit[i].OptRGB[j].Operand = translate_operand(comb->OperandRGB[j]); - key->unit[i].OptA[j].Operand = translate_operand(comb->OperandA[j]); - key->unit[i].OptRGB[j].Source = translate_source(comb->SourceRGB[j]); - key->unit[i].OptA[j].Source = translate_source(comb->SourceA[j]); - } - - if (key->unit[i].ModeRGB == MODE_BUMP_ENVMAP_ATI) { - /* requires some special translation */ - key->unit[i].NumArgsRGB = 2; - key->unit[i].ScaleShiftRGB = 0; - key->unit[i].OptRGB[0].Operand = OPR_SRC_COLOR; - key->unit[i].OptRGB[0].Source = SRC_TEXTURE; - key->unit[i].OptRGB[1].Operand = OPR_SRC_COLOR; - key->unit[i].OptRGB[1].Source = texUnit->BumpTarget - GL_TEXTURE0 + SRC_TEXTURE0; - } - - /* this is a back-door for enabling cylindrical texture wrap mode */ - if (texObj->Priority == 0.125) - key->unit[i].texture_cyl_wrap = 1; - } - - /* _NEW_LIGHT | _NEW_FOG */ - if (texenv_doing_secondary_color(ctx)) { - key->separate_specular = 1; - inputs_referenced |= FRAG_BIT_COL1; - } - - /* _NEW_FOG */ - if (ctx->Fog.Enabled) { - key->fog_enabled = 1; - key->fog_mode = translate_fog_mode(ctx->Fog.Mode); - inputs_referenced |= FRAG_BIT_FOGC; /* maybe */ - } - - /* _NEW_BUFFERS */ - key->num_draw_buffers = ctx->DrawBuffer->_NumColorDrawBuffers; - - key->inputs_available = (inputs_available & inputs_referenced); - - /* compute size of state key, ignoring unused texture units */ - keySize = sizeof(*key) - sizeof(key->unit) - + key->nr_enabled_units * sizeof(key->unit[0]); - - return keySize; -} - - -/** - * Use uregs to represent registers internally, translate to Mesa's - * expected formats on emit. - * - * NOTE: These are passed by value extensively in this file rather - * than as usual by pointer reference. If this disturbs you, try - * remembering they are just 32bits in size. - * - * GCC is smart enough to deal with these dword-sized structures in - * much the same way as if I had defined them as dwords and was using - * macros to access and set the fields. This is much nicer and easier - * to evolve. - */ -struct ureg { - GLuint file:4; - GLuint idx:8; - GLuint negatebase:1; - GLuint swz:12; - GLuint pad:7; -}; - -static const struct ureg undef = { - PROGRAM_UNDEFINED, - 255, - 0, - 0, - 0 -}; - - -/** State used to build the fragment program: - */ -struct texenv_fragment_program { - struct gl_fragment_program *program; - struct state_key *state; - - GLbitfield alu_temps; /**< Track texture indirections, see spec. */ - GLbitfield temps_output; /**< Track texture indirections, see spec. */ - GLbitfield temp_in_use; /**< Tracks temporary regs which are in use. */ - GLboolean error; - - struct ureg src_texture[MAX_TEXTURE_COORD_UNITS]; - /* Reg containing each texture unit's sampled texture color, - * else undef. - */ - - struct ureg texcoord_tex[MAX_TEXTURE_COORD_UNITS]; - /* Reg containing texcoord for a texture unit, - * needed for bump mapping, else undef. - */ - - struct ureg src_previous; /**< Reg containing color from previous - * stage. May need to be decl'd. - */ - - GLuint last_tex_stage; /**< Number of last enabled texture unit */ - - struct ureg half; - struct ureg one; - struct ureg zero; -}; - - - -static struct ureg make_ureg(GLuint file, GLuint idx) -{ - struct ureg reg; - reg.file = file; - reg.idx = idx; - reg.negatebase = 0; - reg.swz = SWIZZLE_NOOP; - reg.pad = 0; - return reg; -} - -static struct ureg swizzle( struct ureg reg, int x, int y, int z, int w ) -{ - reg.swz = MAKE_SWIZZLE4(GET_SWZ(reg.swz, x), - GET_SWZ(reg.swz, y), - GET_SWZ(reg.swz, z), - GET_SWZ(reg.swz, w)); - - return reg; -} - -static struct ureg swizzle1( struct ureg reg, int x ) -{ - return swizzle(reg, x, x, x, x); -} - -static struct ureg negate( struct ureg reg ) -{ - reg.negatebase ^= 1; - return reg; -} - -static GLboolean is_undef( struct ureg reg ) -{ - return reg.file == PROGRAM_UNDEFINED; -} - - -static struct ureg get_temp( struct texenv_fragment_program *p ) -{ - GLint bit; - - /* First try and reuse temps which have been used already: - */ - bit = _mesa_ffs( ~p->temp_in_use & p->alu_temps ); - - /* Then any unused temporary: - */ - if (!bit) - bit = _mesa_ffs( ~p->temp_in_use ); - - if (!bit) { - _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__); - exit(1); - } - - if ((GLuint) bit > p->program->Base.NumTemporaries) - p->program->Base.NumTemporaries = bit; - - p->temp_in_use |= 1<<(bit-1); - return make_ureg(PROGRAM_TEMPORARY, (bit-1)); -} - -static struct ureg get_tex_temp( struct texenv_fragment_program *p ) -{ - int bit; - - /* First try to find available temp not previously used (to avoid - * starting a new texture indirection). According to the spec, the - * ~p->temps_output isn't necessary, but will keep it there for - * now: - */ - bit = _mesa_ffs( ~p->temp_in_use & ~p->alu_temps & ~p->temps_output ); - - /* Then any unused temporary: - */ - if (!bit) - bit = _mesa_ffs( ~p->temp_in_use ); - - if (!bit) { - _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__); - exit(1); - } - - if ((GLuint) bit > p->program->Base.NumTemporaries) - p->program->Base.NumTemporaries = bit; - - p->temp_in_use |= 1<<(bit-1); - return make_ureg(PROGRAM_TEMPORARY, (bit-1)); -} - - -/** Mark a temp reg as being no longer allocatable. */ -static void reserve_temp( struct texenv_fragment_program *p, struct ureg r ) -{ - if (r.file == PROGRAM_TEMPORARY) - p->temps_output |= (1 << r.idx); -} - - -static void release_temps(struct gl_context *ctx, struct texenv_fragment_program *p ) -{ - GLuint max_temp = ctx->Const.FragmentProgram.MaxTemps; - - /* KW: To support tex_env_crossbar, don't release the registers in - * temps_output. - */ - if (max_temp >= sizeof(int) * 8) - p->temp_in_use = p->temps_output; - else - p->temp_in_use = ~((1<<max_temp)-1) | p->temps_output; -} - - -static struct ureg register_param5( struct texenv_fragment_program *p, - GLint s0, - GLint s1, - GLint s2, - GLint s3, - GLint s4) -{ - int tokens[STATE_LENGTH]; - GLuint idx; - tokens[0] = s0; - tokens[1] = s1; - tokens[2] = s2; - tokens[3] = s3; - tokens[4] = s4; - idx = _mesa_add_state_reference(p->program->Base.Parameters, - (gl_state_index *)tokens); - return make_ureg(PROGRAM_STATE_VAR, idx); -} - - -#define register_param1(p,s0) register_param5(p,s0,0,0,0,0) -#define register_param2(p,s0,s1) register_param5(p,s0,s1,0,0,0) -#define register_param3(p,s0,s1,s2) register_param5(p,s0,s1,s2,0,0) -#define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0) - -static GLuint frag_to_vert_attrib( GLuint attrib ) -{ - switch (attrib) { - case FRAG_ATTRIB_COL0: return VERT_ATTRIB_COLOR0; - case FRAG_ATTRIB_COL1: return VERT_ATTRIB_COLOR1; - default: - assert(attrib >= FRAG_ATTRIB_TEX0); - assert(attrib <= FRAG_ATTRIB_TEX7); - return attrib - FRAG_ATTRIB_TEX0 + VERT_ATTRIB_TEX0; - } -} - - -static struct ureg register_input( struct texenv_fragment_program *p, GLuint input ) -{ - if (p->state->inputs_available & (1<<input)) { - p->program->Base.InputsRead |= (1 << input); - return make_ureg(PROGRAM_INPUT, input); - } - else { - GLuint idx = frag_to_vert_attrib( input ); - return register_param3( p, STATE_INTERNAL, STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED, idx ); - } -} - - -static void emit_arg( struct prog_src_register *reg, - struct ureg ureg ) -{ - reg->File = ureg.file; - reg->Index = ureg.idx; - reg->Swizzle = ureg.swz; - reg->Negate = ureg.negatebase ? NEGATE_XYZW : NEGATE_NONE; - reg->Abs = GL_FALSE; -} - -static void emit_dst( struct prog_dst_register *dst, - struct ureg ureg, GLuint mask ) -{ - dst->File = ureg.file; - dst->Index = ureg.idx; - dst->WriteMask = mask; - dst->CondMask = COND_TR; /* always pass cond test */ - dst->CondSwizzle = SWIZZLE_NOOP; -} - -static struct prog_instruction * -emit_op(struct texenv_fragment_program *p, - enum prog_opcode op, - struct ureg dest, - GLuint mask, - GLboolean saturate, - struct ureg src0, - struct ureg src1, - struct ureg src2 ) -{ - const GLuint nr = p->program->Base.NumInstructions++; - struct prog_instruction *inst = &p->program->Base.Instructions[nr]; - - assert(nr < MAX_INSTRUCTIONS); - - _mesa_init_instructions(inst, 1); - inst->Opcode = op; - - emit_arg( &inst->SrcReg[0], src0 ); - emit_arg( &inst->SrcReg[1], src1 ); - emit_arg( &inst->SrcReg[2], src2 ); - - inst->SaturateMode = saturate ? SATURATE_ZERO_ONE : SATURATE_OFF; - - emit_dst( &inst->DstReg, dest, mask ); - -#if 0 - /* Accounting for indirection tracking: - */ - if (dest.file == PROGRAM_TEMPORARY) - p->temps_output |= 1 << dest.idx; -#endif - - return inst; -} - - -static struct ureg emit_arith( struct texenv_fragment_program *p, - enum prog_opcode op, - struct ureg dest, - GLuint mask, - GLboolean saturate, - struct ureg src0, - struct ureg src1, - struct ureg src2 ) -{ - emit_op(p, op, dest, mask, saturate, src0, src1, src2); - - /* Accounting for indirection tracking: - */ - if (src0.file == PROGRAM_TEMPORARY) - p->alu_temps |= 1 << src0.idx; - - if (!is_undef(src1) && src1.file == PROGRAM_TEMPORARY) - p->alu_temps |= 1 << src1.idx; - - if (!is_undef(src2) && src2.file == PROGRAM_TEMPORARY) - p->alu_temps |= 1 << src2.idx; - - if (dest.file == PROGRAM_TEMPORARY) - p->alu_temps |= 1 << dest.idx; - - p->program->Base.NumAluInstructions++; - return dest; -} - -static struct ureg emit_texld( struct texenv_fragment_program *p, - enum prog_opcode op, - struct ureg dest, - GLuint destmask, - GLuint tex_unit, - GLuint tex_idx, - GLuint tex_shadow, - struct ureg coord ) -{ - struct prog_instruction *inst = emit_op( p, op, - dest, destmask, - GL_FALSE, /* don't saturate? */ - coord, /* arg 0? */ - undef, - undef); - - inst->TexSrcTarget = tex_idx; - inst->TexSrcUnit = tex_unit; - inst->TexShadow = tex_shadow; - - p->program->Base.NumTexInstructions++; - - /* Accounting for indirection tracking: - */ - reserve_temp(p, dest); - -#if 0 - /* Is this a texture indirection? - */ - if ((coord.file == PROGRAM_TEMPORARY && - (p->temps_output & (1<<coord.idx))) || - (dest.file == PROGRAM_TEMPORARY && - (p->alu_temps & (1<<dest.idx)))) { - p->program->Base.NumTexIndirections++; - p->temps_output = 1<<coord.idx; - p->alu_temps = 0; - assert(0); /* KW: texture env crossbar */ - } -#endif - - return dest; -} - - -static struct ureg register_const4f( struct texenv_fragment_program *p, - GLfloat s0, - GLfloat s1, - GLfloat s2, - GLfloat s3) -{ - GLfloat values[4]; - GLuint idx, swizzle; - struct ureg r; - values[0] = s0; - values[1] = s1; - values[2] = s2; - values[3] = s3; - idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4, - &swizzle ); - r = make_ureg(PROGRAM_CONSTANT, idx); - r.swz = swizzle; - return r; -} - -#define register_scalar_const(p, s0) register_const4f(p, s0, s0, s0, s0) -#define register_const1f(p, s0) register_const4f(p, s0, 0, 0, 1) -#define register_const2f(p, s0, s1) register_const4f(p, s0, s1, 0, 1) -#define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1) - - -static struct ureg get_one( struct texenv_fragment_program *p ) -{ - if (is_undef(p->one)) - p->one = register_scalar_const(p, 1.0); - return p->one; -} - -static struct ureg get_half( struct texenv_fragment_program *p ) -{ - if (is_undef(p->half)) - p->half = register_scalar_const(p, 0.5); - return p->half; -} - -static struct ureg get_zero( struct texenv_fragment_program *p ) -{ - if (is_undef(p->zero)) - p->zero = register_scalar_const(p, 0.0); - return p->zero; -} - - -static void program_error( struct texenv_fragment_program *p, const char *msg ) -{ - _mesa_problem(NULL, "%s", msg); - p->error = 1; -} - -static struct ureg get_source( struct texenv_fragment_program *p, - GLuint src, GLuint unit ) -{ - switch (src) { - case SRC_TEXTURE: - assert(!is_undef(p->src_texture[unit])); - return p->src_texture[unit]; - - case SRC_TEXTURE0: - case SRC_TEXTURE1: - case SRC_TEXTURE2: - case SRC_TEXTURE3: - case SRC_TEXTURE4: - case SRC_TEXTURE5: - case SRC_TEXTURE6: - case SRC_TEXTURE7: - assert(!is_undef(p->src_texture[src - SRC_TEXTURE0])); - return p->src_texture[src - SRC_TEXTURE0]; - - case SRC_CONSTANT: - return register_param2(p, STATE_TEXENV_COLOR, unit); - - case SRC_PRIMARY_COLOR: - return register_input(p, FRAG_ATTRIB_COL0); - - case SRC_ZERO: - return get_zero(p); - - case SRC_PREVIOUS: - if (is_undef(p->src_previous)) - return register_input(p, FRAG_ATTRIB_COL0); - else - return p->src_previous; - - default: - assert(0); - return undef; - } -} - -static struct ureg emit_combine_source( struct texenv_fragment_program *p, - GLuint mask, - GLuint unit, - GLuint source, - GLuint operand ) -{ - struct ureg arg, src, one; - - src = get_source(p, source, unit); - - switch (operand) { - case OPR_ONE_MINUS_SRC_COLOR: - /* Get unused tmp, - * Emit tmp = 1.0 - arg.xyzw - */ - arg = get_temp( p ); - one = get_one( p ); - return emit_arith( p, OPCODE_SUB, arg, mask, 0, one, src, undef); - - case OPR_SRC_ALPHA: - if (mask == WRITEMASK_W) - return src; - else - return swizzle1( src, SWIZZLE_W ); - case OPR_ONE_MINUS_SRC_ALPHA: - /* Get unused tmp, - * Emit tmp = 1.0 - arg.wwww - */ - arg = get_temp(p); - one = get_one(p); - return emit_arith(p, OPCODE_SUB, arg, mask, 0, - one, swizzle1(src, SWIZZLE_W), undef); - case OPR_ZERO: - return get_zero(p); - case OPR_ONE: - return get_one(p); - case OPR_SRC_COLOR: - return src; - default: - assert(0); - return src; - } -} - -/** - * Check if the RGB and Alpha sources and operands match for the given - * texture unit's combinder state. When the RGB and A sources and - * operands match, we can emit fewer instructions. - */ -static GLboolean args_match( const struct state_key *key, GLuint unit ) -{ - GLuint i, numArgs = key->unit[unit].NumArgsRGB; - - for (i = 0; i < numArgs; i++) { - if (key->unit[unit].OptA[i].Source != key->unit[unit].OptRGB[i].Source) - return GL_FALSE; - - switch (key->unit[unit].OptA[i].Operand) { - case OPR_SRC_ALPHA: - switch (key->unit[unit].OptRGB[i].Operand) { - case OPR_SRC_COLOR: - case OPR_SRC_ALPHA: - break; - default: - return GL_FALSE; - } - break; - case OPR_ONE_MINUS_SRC_ALPHA: - switch (key->unit[unit].OptRGB[i].Operand) { - case OPR_ONE_MINUS_SRC_COLOR: - case OPR_ONE_MINUS_SRC_ALPHA: - break; - default: - return GL_FALSE; - } - break; - default: - return GL_FALSE; /* impossible */ - } - } - - return GL_TRUE; -} - -static struct ureg emit_combine( struct texenv_fragment_program *p, - struct ureg dest, - GLuint mask, - GLboolean saturate, - GLuint unit, - GLuint nr, - GLuint mode, - const struct mode_opt *opt) -{ - struct ureg src[MAX_COMBINER_TERMS]; - struct ureg tmp, half; - GLuint i; - - assert(nr <= MAX_COMBINER_TERMS); - - for (i = 0; i < nr; i++) - src[i] = emit_combine_source( p, mask, unit, opt[i].Source, opt[i].Operand ); - - switch (mode) { - case MODE_REPLACE: - if (mask == WRITEMASK_XYZW && !saturate) - return src[0]; - else - return emit_arith( p, OPCODE_MOV, dest, mask, saturate, src[0], undef, undef ); - case MODE_MODULATE: - return emit_arith( p, OPCODE_MUL, dest, mask, saturate, - src[0], src[1], undef ); - case MODE_ADD: - return emit_arith( p, OPCODE_ADD, dest, mask, saturate, - src[0], src[1], undef ); - case MODE_ADD_SIGNED: - /* tmp = arg0 + arg1 - * result = tmp - .5 - */ - half = get_half(p); - tmp = get_temp( p ); - emit_arith( p, OPCODE_ADD, tmp, mask, 0, src[0], src[1], undef ); - emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp, half, undef ); - return dest; - case MODE_INTERPOLATE: - /* Arg0 * (Arg2) + Arg1 * (1-Arg2) -- note arguments are reordered: - */ - return emit_arith( p, OPCODE_LRP, dest, mask, saturate, src[2], src[0], src[1] ); - - case MODE_SUBTRACT: - return emit_arith( p, OPCODE_SUB, dest, mask, saturate, src[0], src[1], undef ); - - case MODE_DOT3_RGBA: - case MODE_DOT3_RGBA_EXT: - case MODE_DOT3_RGB_EXT: - case MODE_DOT3_RGB: { - struct ureg tmp0 = get_temp( p ); - struct ureg tmp1 = get_temp( p ); - struct ureg neg1 = register_scalar_const(p, -1); - struct ureg two = register_scalar_const(p, 2); - - /* tmp0 = 2*src0 - 1 - * tmp1 = 2*src1 - 1 - * - * dst = tmp0 dot3 tmp1 - */ - emit_arith( p, OPCODE_MAD, tmp0, WRITEMASK_XYZW, 0, - two, src[0], neg1); - - if (memcmp(&src[0], &src[1], sizeof(struct ureg)) == 0) - tmp1 = tmp0; - else - emit_arith( p, OPCODE_MAD, tmp1, WRITEMASK_XYZW, 0, - two, src[1], neg1); - emit_arith( p, OPCODE_DP3, dest, mask, saturate, tmp0, tmp1, undef); - return dest; - } - case MODE_MODULATE_ADD_ATI: - /* Arg0 * Arg2 + Arg1 */ - return emit_arith( p, OPCODE_MAD, dest, mask, saturate, - src[0], src[2], src[1] ); - case MODE_MODULATE_SIGNED_ADD_ATI: { - /* Arg0 * Arg2 + Arg1 - 0.5 */ - struct ureg tmp0 = get_temp(p); - half = get_half(p); - emit_arith( p, OPCODE_MAD, tmp0, mask, 0, src[0], src[2], src[1] ); - emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp0, half, undef ); - return dest; - } - case MODE_MODULATE_SUBTRACT_ATI: - /* Arg0 * Arg2 - Arg1 */ - emit_arith( p, OPCODE_MAD, dest, mask, 0, src[0], src[2], negate(src[1]) ); - return dest; - case MODE_ADD_PRODUCTS: - /* Arg0 * Arg1 + Arg2 * Arg3 */ - { - struct ureg tmp0 = get_temp(p); - emit_arith( p, OPCODE_MUL, tmp0, mask, 0, src[0], src[1], undef ); - emit_arith( p, OPCODE_MAD, dest, mask, saturate, src[2], src[3], tmp0 ); - } - return dest; - case MODE_ADD_PRODUCTS_SIGNED: - /* Arg0 * Arg1 + Arg2 * Arg3 - 0.5 */ - { - struct ureg tmp0 = get_temp(p); - half = get_half(p); - emit_arith( p, OPCODE_MUL, tmp0, mask, 0, src[0], src[1], undef ); - emit_arith( p, OPCODE_MAD, tmp0, mask, 0, src[2], src[3], tmp0 ); - emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp0, half, undef ); - } - return dest; - case MODE_BUMP_ENVMAP_ATI: - /* special - not handled here */ - assert(0); - return src[0]; - default: - assert(0); - return src[0]; - } -} - - -/** - * Generate instructions for one texture unit's env/combiner mode. - */ -static struct ureg -emit_texenv(struct texenv_fragment_program *p, GLuint unit) -{ - const struct state_key *key = p->state; - GLboolean rgb_saturate, alpha_saturate; - GLuint rgb_shift, alpha_shift; - struct ureg out, dest; - - if (!key->unit[unit].enabled) { - return get_source(p, SRC_PREVIOUS, 0); - } - if (key->unit[unit].ModeRGB == MODE_BUMP_ENVMAP_ATI) { - /* this isn't really a env stage delivering a color and handled elsewhere */ - return get_source(p, SRC_PREVIOUS, 0); - } - - switch (key->unit[unit].ModeRGB) { - case MODE_DOT3_RGB_EXT: - alpha_shift = key->unit[unit].ScaleShiftA; - rgb_shift = 0; - break; - case MODE_DOT3_RGBA_EXT: - alpha_shift = 0; - rgb_shift = 0; - break; - default: - rgb_shift = key->unit[unit].ScaleShiftRGB; - alpha_shift = key->unit[unit].ScaleShiftA; - break; - } - - /* If we'll do rgb/alpha shifting don't saturate in emit_combine(). - * We don't want to clamp twice. - */ - if (rgb_shift) - rgb_saturate = GL_FALSE; /* saturate after rgb shift */ - else if (need_saturate(key->unit[unit].ModeRGB)) - rgb_saturate = GL_TRUE; - else - rgb_saturate = GL_FALSE; - - if (alpha_shift) - alpha_saturate = GL_FALSE; /* saturate after alpha shift */ - else if (need_saturate(key->unit[unit].ModeA)) - alpha_saturate = GL_TRUE; - else - alpha_saturate = GL_FALSE; - - /* If this is the very last calculation (and various other conditions - * are met), emit directly to the color output register. Otherwise, - * emit to a temporary register. - */ - if (key->separate_specular || - unit != p->last_tex_stage || - alpha_shift || - key->num_draw_buffers != 1 || - rgb_shift) - dest = get_temp( p ); - else - dest = make_ureg(PROGRAM_OUTPUT, FRAG_RESULT_COLOR); - - /* Emit the RGB and A combine ops - */ - if (key->unit[unit].ModeRGB == key->unit[unit].ModeA && - args_match(key, unit)) { - out = emit_combine( p, dest, WRITEMASK_XYZW, rgb_saturate, - unit, - key->unit[unit].NumArgsRGB, - key->unit[unit].ModeRGB, - key->unit[unit].OptRGB); - } - else if (key->unit[unit].ModeRGB == MODE_DOT3_RGBA_EXT || - key->unit[unit].ModeRGB == MODE_DOT3_RGBA) { - out = emit_combine( p, dest, WRITEMASK_XYZW, rgb_saturate, - unit, - key->unit[unit].NumArgsRGB, - key->unit[unit].ModeRGB, - key->unit[unit].OptRGB); - } - else { - /* Need to do something to stop from re-emitting identical - * argument calculations here: - */ - out = emit_combine( p, dest, WRITEMASK_XYZ, rgb_saturate, - unit, - key->unit[unit].NumArgsRGB, - key->unit[unit].ModeRGB, - key->unit[unit].OptRGB); - out = emit_combine( p, dest, WRITEMASK_W, alpha_saturate, - unit, - key->unit[unit].NumArgsA, - key->unit[unit].ModeA, - key->unit[unit].OptA); - } - - /* Deal with the final shift: - */ - if (alpha_shift || rgb_shift) { - struct ureg shift; - GLboolean saturate = GL_TRUE; /* always saturate at this point */ - - if (rgb_shift == alpha_shift) { - shift = register_scalar_const(p, (GLfloat)(1<<rgb_shift)); - } - else { - shift = register_const4f(p, - (GLfloat)(1<<rgb_shift), - (GLfloat)(1<<rgb_shift), - (GLfloat)(1<<rgb_shift), - (GLfloat)(1<<alpha_shift)); - } - return emit_arith( p, OPCODE_MUL, dest, WRITEMASK_XYZW, - saturate, out, shift, undef ); - } - else - return out; -} - - -/** - * Generate instruction for getting a texture source term. - */ -static void load_texture( struct texenv_fragment_program *p, GLuint unit ) -{ - if (is_undef(p->src_texture[unit])) { - const GLuint texTarget = p->state->unit[unit].source_index; - struct ureg texcoord; - struct ureg tmp = get_tex_temp( p ); - - if (is_undef(p->texcoord_tex[unit])) { - texcoord = register_input(p, FRAG_ATTRIB_TEX0+unit); - } - else { - /* might want to reuse this reg for tex output actually */ - texcoord = p->texcoord_tex[unit]; - } - - /* TODO: Use D0_MASK_XY where possible. - */ - if (p->state->unit[unit].enabled) { - GLboolean shadow = GL_FALSE; - - if (p->state->unit[unit].shadow) { - p->program->Base.ShadowSamplers |= 1 << unit; - shadow = GL_TRUE; - } - - p->src_texture[unit] = emit_texld( p, OPCODE_TXP, - tmp, WRITEMASK_XYZW, - unit, texTarget, shadow, - texcoord ); - - p->program->Base.SamplersUsed |= (1 << unit); - /* This identity mapping should already be in place - * (see _mesa_init_program_struct()) but let's be safe. - */ - p->program->Base.SamplerUnits[unit] = unit; - } - else - p->src_texture[unit] = get_zero(p); - - if (p->state->unit[unit].texture_cyl_wrap) { - /* set flag which is checked by Mesa->Gallium program translation */ - p->program->Base.InputFlags[0] |= PROG_PARAM_BIT_CYL_WRAP; - } - - } -} - -static GLboolean load_texenv_source( struct texenv_fragment_program *p, - GLuint src, GLuint unit ) -{ - switch (src) { - case SRC_TEXTURE: - load_texture(p, unit); - break; - - case SRC_TEXTURE0: - case SRC_TEXTURE1: - case SRC_TEXTURE2: - case SRC_TEXTURE3: - case SRC_TEXTURE4: - case SRC_TEXTURE5: - case SRC_TEXTURE6: - case SRC_TEXTURE7: - load_texture(p, src - SRC_TEXTURE0); - break; - - default: - /* not a texture src - do nothing */ - break; - } - - return GL_TRUE; -} - - -/** - * Generate instructions for loading all texture source terms. - */ -static GLboolean -load_texunit_sources( struct texenv_fragment_program *p, GLuint unit ) -{ - const struct state_key *key = p->state; - GLuint i; - - for (i = 0; i < key->unit[unit].NumArgsRGB; i++) { - load_texenv_source( p, key->unit[unit].OptRGB[i].Source, unit ); - } - - for (i = 0; i < key->unit[unit].NumArgsA; i++) { - load_texenv_source( p, key->unit[unit].OptA[i].Source, unit ); - } - - return GL_TRUE; -} - -/** - * Generate instructions for loading bump map textures. - */ -static GLboolean -load_texunit_bumpmap( struct texenv_fragment_program *p, GLuint unit ) -{ - const struct state_key *key = p->state; - GLuint bumpedUnitNr = key->unit[unit].OptRGB[1].Source - SRC_TEXTURE0; - struct ureg texcDst, bumpMapRes; - struct ureg constdudvcolor = register_const4f(p, 0.0, 0.0, 0.0, 1.0); - struct ureg texcSrc = register_input(p, FRAG_ATTRIB_TEX0 + bumpedUnitNr); - struct ureg rotMat0 = register_param3( p, STATE_INTERNAL, STATE_ROT_MATRIX_0, unit ); - struct ureg rotMat1 = register_param3( p, STATE_INTERNAL, STATE_ROT_MATRIX_1, unit ); - - load_texenv_source( p, unit + SRC_TEXTURE0, unit ); - - bumpMapRes = get_source(p, key->unit[unit].OptRGB[0].Source, unit); - texcDst = get_tex_temp( p ); - p->texcoord_tex[bumpedUnitNr] = texcDst; - - /* Apply rot matrix and add coords to be available in next phase. - * dest = (Arg0.xxxx * rotMat0 + Arg1) + (Arg0.yyyy * rotMat1) - * note only 2 coords are affected the rest are left unchanged (mul by 0) - */ - emit_arith( p, OPCODE_MAD, texcDst, WRITEMASK_XYZW, 0, - swizzle1(bumpMapRes, SWIZZLE_X), rotMat0, texcSrc ); - emit_arith( p, OPCODE_MAD, texcDst, WRITEMASK_XYZW, 0, - swizzle1(bumpMapRes, SWIZZLE_Y), rotMat1, texcDst ); - - /* Move 0,0,0,1 into bumpmap src if someone (crossbar) is foolish - * enough to access this later, should optimize away. - */ - emit_arith( p, OPCODE_MOV, bumpMapRes, WRITEMASK_XYZW, 0, - constdudvcolor, undef, undef ); - - return GL_TRUE; -} - -/** - * Generate a new fragment program which implements the context's - * current texture env/combine mode. - */ -static void -create_new_program(struct gl_context *ctx, struct state_key *key, - struct gl_fragment_program *program) -{ - struct prog_instruction instBuffer[MAX_INSTRUCTIONS]; - struct texenv_fragment_program p; - GLuint unit; - struct ureg cf, out; - int i; - - memset(&p, 0, sizeof(p)); - p.state = key; - p.program = program; - - /* During code generation, use locally-allocated instruction buffer, - * then alloc dynamic storage below. - */ - p.program->Base.Instructions = instBuffer; - p.program->Base.Target = GL_FRAGMENT_PROGRAM_ARB; - p.program->Base.String = NULL; - p.program->Base.NumTexIndirections = 1; /* is this right? */ - p.program->Base.NumTexInstructions = 0; - p.program->Base.NumAluInstructions = 0; - p.program->Base.NumInstructions = 0; - p.program->Base.NumTemporaries = 0; - p.program->Base.NumParameters = 0; - p.program->Base.NumAttributes = 0; - p.program->Base.NumAddressRegs = 0; - p.program->Base.Parameters = _mesa_new_parameter_list(); - p.program->Base.InputsRead = 0x0; - - if (key->num_draw_buffers == 1) - p.program->Base.OutputsWritten = 1 << FRAG_RESULT_COLOR; - else { - for (i = 0; i < key->num_draw_buffers; i++) - p.program->Base.OutputsWritten |= (1 << (FRAG_RESULT_DATA0 + i)); - } - - for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { - p.src_texture[unit] = undef; - p.texcoord_tex[unit] = undef; - } - - p.src_previous = undef; - p.half = undef; - p.zero = undef; - p.one = undef; - - p.last_tex_stage = 0; - release_temps(ctx, &p); - - if (key->enabled_units && key->num_draw_buffers) { - GLboolean needbumpstage = GL_FALSE; - - /* Zeroth pass - bump map textures first */ - for (unit = 0; unit < key->nr_enabled_units; unit++) - if (key->unit[unit].enabled && - key->unit[unit].ModeRGB == MODE_BUMP_ENVMAP_ATI) { - needbumpstage = GL_TRUE; - load_texunit_bumpmap( &p, unit ); - } - if (needbumpstage) - p.program->Base.NumTexIndirections++; - - /* First pass - to support texture_env_crossbar, first identify - * all referenced texture sources and emit texld instructions - * for each: - */ - for (unit = 0; unit < key->nr_enabled_units; unit++) - if (key->unit[unit].enabled) { - load_texunit_sources( &p, unit ); - p.last_tex_stage = unit; - } - - /* Second pass - emit combine instructions to build final color: - */ - for (unit = 0; unit < key->nr_enabled_units; unit++) - if (key->unit[unit].enabled) { - p.src_previous = emit_texenv( &p, unit ); - reserve_temp(&p, p.src_previous); /* don't re-use this temp reg */ - release_temps(ctx, &p); /* release all temps */ - } - } - - cf = get_source( &p, SRC_PREVIOUS, 0 ); - - for (i = 0; i < key->num_draw_buffers; i++) { - if (key->num_draw_buffers == 1) - out = make_ureg( PROGRAM_OUTPUT, FRAG_RESULT_COLOR ); - else { - out = make_ureg( PROGRAM_OUTPUT, FRAG_RESULT_DATA0 + i ); - } - - if (key->separate_specular) { - /* Emit specular add. - */ - struct ureg s = register_input(&p, FRAG_ATTRIB_COL1); - emit_arith( &p, OPCODE_ADD, out, WRITEMASK_XYZ, 0, cf, s, undef ); - emit_arith( &p, OPCODE_MOV, out, WRITEMASK_W, 0, cf, undef, undef ); - } - else if (memcmp(&cf, &out, sizeof(cf)) != 0) { - /* Will wind up in here if no texture enabled or a couple of - * other scenarios (GL_REPLACE for instance). - */ - emit_arith( &p, OPCODE_MOV, out, WRITEMASK_XYZW, 0, cf, undef, undef ); - } - } - /* Finish up: - */ - emit_arith( &p, OPCODE_END, undef, WRITEMASK_XYZW, 0, undef, undef, undef); - - /* Allocate final instruction array. This has to be done before calling - * _mesa_append_fog_code because that function frees the Base.Instructions. - * At this point, Base.Instructions points to stack data, so it's a really - * bad idea to free it. - */ - p.program->Base.Instructions - = _mesa_alloc_instructions(p.program->Base.NumInstructions); - if (!p.program->Base.Instructions) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, - "generating tex env program"); - return; - } - _mesa_copy_instructions(p.program->Base.Instructions, instBuffer, - p.program->Base.NumInstructions); - - /* Append fog code. This must be done before checking the program against - * the limits becuase it will potentially add some instructions. - */ - if (key->fog_enabled) { - _mesa_append_fog_code(ctx, p.program, ctx->Fog.Mode, GL_FALSE); - } - - if (p.program->Base.NumTexIndirections > ctx->Const.FragmentProgram.MaxTexIndirections) - program_error(&p, "Exceeded max nr indirect texture lookups"); - - if (p.program->Base.NumTexInstructions > ctx->Const.FragmentProgram.MaxTexInstructions) - program_error(&p, "Exceeded max TEX instructions"); - - if (p.program->Base.NumAluInstructions > ctx->Const.FragmentProgram.MaxAluInstructions) - program_error(&p, "Exceeded max ALU instructions"); - - ASSERT(p.program->Base.NumInstructions <= MAX_INSTRUCTIONS); - - /* Notify driver the fragment program has (actually) changed. - */ - if (ctx->Driver.ProgramStringNotify) { - GLboolean ok = ctx->Driver.ProgramStringNotify(ctx, - GL_FRAGMENT_PROGRAM_ARB, - &p.program->Base); - /* Driver should be able to handle any texenv programs as long as - * the driver correctly reported max number of texture units correctly, - * etc. - */ - ASSERT(ok); - (void) ok; /* silence unused var warning */ - } - - if (DISASSEM) { - _mesa_print_program(&p.program->Base); - printf("\n"); - } -} - -extern "C" { - -/** - * Return a fragment program which implements the current - * fixed-function texture, fog and color-sum operations. - */ -struct gl_fragment_program * -_mesa_get_fixed_func_fragment_program(struct gl_context *ctx) -{ - struct gl_fragment_program *prog; - struct state_key key; - GLuint keySize; - - keySize = make_state_key(ctx, &key); - - prog = (struct gl_fragment_program *) - _mesa_search_program_cache(ctx->FragmentProgram.Cache, - &key, keySize); - - if (!prog) { - prog = (struct gl_fragment_program *) - ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); - - create_new_program(ctx, &key, prog); - - _mesa_program_cache_insert(ctx, ctx->FragmentProgram.Cache, - &key, keySize, &prog->Base); - } - - return prog; -} - -} +/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * Copyright 2009 VMware, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+extern "C" {
+#include "glheader.h"
+#include "imports.h"
+#include "mtypes.h"
+#include "program/program.h"
+#include "program/prog_parameter.h"
+#include "program/prog_cache.h"
+#include "program/prog_instruction.h"
+#include "program/prog_print.h"
+#include "program/prog_statevars.h"
+#include "program/programopt.h"
+#include "texenvprogram.h"
+}
+
+/*
+ * Note on texture units:
+ *
+ * The number of texture units supported by fixed-function fragment
+ * processing is MAX_TEXTURE_COORD_UNITS, not MAX_TEXTURE_IMAGE_UNITS.
+ * That's because there's a one-to-one correspondence between texture
+ * coordinates and samplers in fixed-function processing.
+ *
+ * Since fixed-function vertex processing is limited to MAX_TEXTURE_COORD_UNITS
+ * sets of texcoords, so is fixed-function fragment processing.
+ *
+ * We can safely use ctx->Const.MaxTextureUnits for loop bounds.
+ */
+
+
+struct texenvprog_cache_item
+{
+ GLuint hash;
+ void *key;
+ struct gl_fragment_program *data;
+ struct texenvprog_cache_item *next;
+};
+
+static GLboolean
+texenv_doing_secondary_color(struct gl_context *ctx)
+{
+ if (ctx->Light.Enabled &&
+ (ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR))
+ return GL_TRUE;
+
+ if (ctx->Fog.ColorSumEnabled)
+ return GL_TRUE;
+
+ return GL_FALSE;
+}
+
+/**
+ * Up to nine instructions per tex unit, plus fog, specular color.
+ */
+#define MAX_INSTRUCTIONS ((MAX_TEXTURE_COORD_UNITS * 9) + 12)
+
+#define DISASSEM (MESA_VERBOSE & VERBOSE_DISASSEM)
+
+struct mode_opt {
+#ifdef __GNUC__
+ __extension__ GLubyte Source:4; /**< SRC_x */
+ __extension__ GLubyte Operand:3; /**< OPR_x */
+#else
+ GLubyte Source; /**< SRC_x */
+ GLubyte Operand; /**< OPR_x */
+#endif
+};
+
+struct state_key {
+ GLuint nr_enabled_units:8;
+ GLuint enabled_units:8;
+ GLuint separate_specular:1;
+ GLuint fog_enabled:1;
+ GLuint fog_mode:2; /**< FOG_x */
+ GLuint inputs_available:12;
+ GLuint num_draw_buffers:4;
+
+ /* NOTE: This array of structs must be last! (see "keySize" below) */
+ struct {
+ GLuint enabled:1;
+ GLuint source_index:3; /**< TEXTURE_x_INDEX */
+ GLuint shadow:1;
+ GLuint ScaleShiftRGB:2;
+ GLuint ScaleShiftA:2;
+
+ GLuint NumArgsRGB:3; /**< up to MAX_COMBINER_TERMS */
+ GLuint ModeRGB:5; /**< MODE_x */
+
+ GLuint NumArgsA:3; /**< up to MAX_COMBINER_TERMS */
+ GLuint ModeA:5; /**< MODE_x */
+
+ GLuint texture_cyl_wrap:1; /**< For gallium test/debug only */
+
+ struct mode_opt OptRGB[MAX_COMBINER_TERMS];
+ struct mode_opt OptA[MAX_COMBINER_TERMS];
+ } unit[MAX_TEXTURE_UNITS];
+};
+
+#define FOG_LINEAR 0
+#define FOG_EXP 1
+#define FOG_EXP2 2
+#define FOG_UNKNOWN 3
+
+static GLuint translate_fog_mode( GLenum mode )
+{
+ switch (mode) {
+ case GL_LINEAR: return FOG_LINEAR;
+ case GL_EXP: return FOG_EXP;
+ case GL_EXP2: return FOG_EXP2;
+ default: return FOG_UNKNOWN;
+ }
+}
+
+#define OPR_SRC_COLOR 0
+#define OPR_ONE_MINUS_SRC_COLOR 1
+#define OPR_SRC_ALPHA 2
+#define OPR_ONE_MINUS_SRC_ALPHA 3
+#define OPR_ZERO 4
+#define OPR_ONE 5
+#define OPR_UNKNOWN 7
+
+static GLuint translate_operand( GLenum operand )
+{
+ switch (operand) {
+ case GL_SRC_COLOR: return OPR_SRC_COLOR;
+ case GL_ONE_MINUS_SRC_COLOR: return OPR_ONE_MINUS_SRC_COLOR;
+ case GL_SRC_ALPHA: return OPR_SRC_ALPHA;
+ case GL_ONE_MINUS_SRC_ALPHA: return OPR_ONE_MINUS_SRC_ALPHA;
+ case GL_ZERO: return OPR_ZERO;
+ case GL_ONE: return OPR_ONE;
+ default:
+ assert(0);
+ return OPR_UNKNOWN;
+ }
+}
+
+#define SRC_TEXTURE 0
+#define SRC_TEXTURE0 1
+#define SRC_TEXTURE1 2
+#define SRC_TEXTURE2 3
+#define SRC_TEXTURE3 4
+#define SRC_TEXTURE4 5
+#define SRC_TEXTURE5 6
+#define SRC_TEXTURE6 7
+#define SRC_TEXTURE7 8
+#define SRC_CONSTANT 9
+#define SRC_PRIMARY_COLOR 10
+#define SRC_PREVIOUS 11
+#define SRC_ZERO 12
+#define SRC_UNKNOWN 15
+
+static GLuint translate_source( GLenum src )
+{
+ switch (src) {
+ case GL_TEXTURE: return SRC_TEXTURE;
+ case GL_TEXTURE0:
+ case GL_TEXTURE1:
+ case GL_TEXTURE2:
+ case GL_TEXTURE3:
+ case GL_TEXTURE4:
+ case GL_TEXTURE5:
+ case GL_TEXTURE6:
+ case GL_TEXTURE7: return SRC_TEXTURE0 + (src - GL_TEXTURE0);
+ case GL_CONSTANT: return SRC_CONSTANT;
+ case GL_PRIMARY_COLOR: return SRC_PRIMARY_COLOR;
+ case GL_PREVIOUS: return SRC_PREVIOUS;
+ case GL_ZERO:
+ return SRC_ZERO;
+ default:
+ assert(0);
+ return SRC_UNKNOWN;
+ }
+}
+
+#define MODE_REPLACE 0 /* r = a0 */
+#define MODE_MODULATE 1 /* r = a0 * a1 */
+#define MODE_ADD 2 /* r = a0 + a1 */
+#define MODE_ADD_SIGNED 3 /* r = a0 + a1 - 0.5 */
+#define MODE_INTERPOLATE 4 /* r = a0 * a2 + a1 * (1 - a2) */
+#define MODE_SUBTRACT 5 /* r = a0 - a1 */
+#define MODE_DOT3_RGB 6 /* r = a0 . a1 */
+#define MODE_DOT3_RGB_EXT 7 /* r = a0 . a1 */
+#define MODE_DOT3_RGBA 8 /* r = a0 . a1 */
+#define MODE_DOT3_RGBA_EXT 9 /* r = a0 . a1 */
+#define MODE_MODULATE_ADD_ATI 10 /* r = a0 * a2 + a1 */
+#define MODE_MODULATE_SIGNED_ADD_ATI 11 /* r = a0 * a2 + a1 - 0.5 */
+#define MODE_MODULATE_SUBTRACT_ATI 12 /* r = a0 * a2 - a1 */
+#define MODE_ADD_PRODUCTS 13 /* r = a0 * a1 + a2 * a3 */
+#define MODE_ADD_PRODUCTS_SIGNED 14 /* r = a0 * a1 + a2 * a3 - 0.5 */
+#define MODE_BUMP_ENVMAP_ATI 15 /* special */
+#define MODE_UNKNOWN 16
+
+/**
+ * Translate GL combiner state into a MODE_x value
+ */
+static GLuint translate_mode( GLenum envMode, GLenum mode )
+{
+ switch (mode) {
+ case GL_REPLACE: return MODE_REPLACE;
+ case GL_MODULATE: return MODE_MODULATE;
+ case GL_ADD:
+ if (envMode == GL_COMBINE4_NV)
+ return MODE_ADD_PRODUCTS;
+ else
+ return MODE_ADD;
+ case GL_ADD_SIGNED:
+ if (envMode == GL_COMBINE4_NV)
+ return MODE_ADD_PRODUCTS_SIGNED;
+ else
+ return MODE_ADD_SIGNED;
+ case GL_INTERPOLATE: return MODE_INTERPOLATE;
+ case GL_SUBTRACT: return MODE_SUBTRACT;
+ case GL_DOT3_RGB: return MODE_DOT3_RGB;
+ case GL_DOT3_RGB_EXT: return MODE_DOT3_RGB_EXT;
+ case GL_DOT3_RGBA: return MODE_DOT3_RGBA;
+ case GL_DOT3_RGBA_EXT: return MODE_DOT3_RGBA_EXT;
+ case GL_MODULATE_ADD_ATI: return MODE_MODULATE_ADD_ATI;
+ case GL_MODULATE_SIGNED_ADD_ATI: return MODE_MODULATE_SIGNED_ADD_ATI;
+ case GL_MODULATE_SUBTRACT_ATI: return MODE_MODULATE_SUBTRACT_ATI;
+ case GL_BUMP_ENVMAP_ATI: return MODE_BUMP_ENVMAP_ATI;
+ default:
+ assert(0);
+ return MODE_UNKNOWN;
+ }
+}
+
+
+/**
+ * Do we need to clamp the results of the given texture env/combine mode?
+ * If the inputs to the mode are in [0,1] we don't always have to clamp
+ * the results.
+ */
+static GLboolean
+need_saturate( GLuint mode )
+{
+ switch (mode) {
+ case MODE_REPLACE:
+ case MODE_MODULATE:
+ case MODE_INTERPOLATE:
+ return GL_FALSE;
+ case MODE_ADD:
+ case MODE_ADD_SIGNED:
+ case MODE_SUBTRACT:
+ case MODE_DOT3_RGB:
+ case MODE_DOT3_RGB_EXT:
+ case MODE_DOT3_RGBA:
+ case MODE_DOT3_RGBA_EXT:
+ case MODE_MODULATE_ADD_ATI:
+ case MODE_MODULATE_SIGNED_ADD_ATI:
+ case MODE_MODULATE_SUBTRACT_ATI:
+ case MODE_ADD_PRODUCTS:
+ case MODE_ADD_PRODUCTS_SIGNED:
+ case MODE_BUMP_ENVMAP_ATI:
+ return GL_TRUE;
+ default:
+ assert(0);
+ return GL_FALSE;
+ }
+}
+
+
+
+/**
+ * Translate TEXTURE_x_BIT to TEXTURE_x_INDEX.
+ */
+static GLuint translate_tex_src_bit( GLbitfield bit )
+{
+ ASSERT(bit);
+ return _mesa_ffs(bit) - 1;
+}
+
+
+#define VERT_BIT_TEX_ANY (0xff << VERT_ATTRIB_TEX0)
+#define VERT_RESULT_TEX_ANY (0xff << VERT_RESULT_TEX0)
+
+/**
+ * Identify all possible varying inputs. The fragment program will
+ * never reference non-varying inputs, but will track them via state
+ * constants instead.
+ *
+ * This function figures out all the inputs that the fragment program
+ * has access to. The bitmask is later reduced to just those which
+ * are actually referenced.
+ */
+static GLbitfield get_fp_input_mask( struct gl_context *ctx )
+{
+ /* _NEW_PROGRAM */
+ const GLboolean vertexShader =
+ (ctx->Shader.CurrentVertexProgram &&
+ ctx->Shader.CurrentVertexProgram->LinkStatus &&
+ ctx->Shader.CurrentVertexProgram->VertexProgram);
+ const GLboolean vertexProgram = ctx->VertexProgram._Enabled;
+ GLbitfield fp_inputs = 0x0;
+
+ if (ctx->VertexProgram._Overriden) {
+ /* Somebody's messing with the vertex program and we don't have
+ * a clue what's happening. Assume that it could be producing
+ * all possible outputs.
+ */
+ fp_inputs = ~0;
+ }
+ else if (ctx->RenderMode == GL_FEEDBACK) {
+ /* _NEW_RENDERMODE */
+ fp_inputs = (FRAG_BIT_COL0 | FRAG_BIT_TEX0);
+ }
+ else if (!(vertexProgram || vertexShader) ||
+ !ctx->VertexProgram._Current) {
+ /* Fixed function vertex logic */
+ /* _NEW_ARRAY */
+ GLbitfield varying_inputs = ctx->varying_vp_inputs;
+
+ /* These get generated in the setup routine regardless of the
+ * vertex program:
+ */
+ /* _NEW_POINT */
+ if (ctx->Point.PointSprite)
+ varying_inputs |= FRAG_BITS_TEX_ANY;
+
+ /* First look at what values may be computed by the generated
+ * vertex program:
+ */
+ /* _NEW_LIGHT */
+ if (ctx->Light.Enabled) {
+ fp_inputs |= FRAG_BIT_COL0;
+
+ if (texenv_doing_secondary_color(ctx))
+ fp_inputs |= FRAG_BIT_COL1;
+ }
+
+ /* _NEW_TEXTURE */
+ fp_inputs |= (ctx->Texture._TexGenEnabled |
+ ctx->Texture._TexMatEnabled) << FRAG_ATTRIB_TEX0;
+
+ /* Then look at what might be varying as a result of enabled
+ * arrays, etc:
+ */
+ if (varying_inputs & VERT_BIT_COLOR0)
+ fp_inputs |= FRAG_BIT_COL0;
+ if (varying_inputs & VERT_BIT_COLOR1)
+ fp_inputs |= FRAG_BIT_COL1;
+
+ fp_inputs |= (((varying_inputs & VERT_BIT_TEX_ANY) >> VERT_ATTRIB_TEX0)
+ << FRAG_ATTRIB_TEX0);
+
+ }
+ else {
+ /* calculate from vp->outputs */
+ struct gl_vertex_program *vprog;
+ GLbitfield64 vp_outputs;
+
+ /* Choose GLSL vertex shader over ARB vertex program. Need this
+ * since vertex shader state validation comes after fragment state
+ * validation (see additional comments in state.c).
+ */
+ if (vertexShader)
+ vprog = ctx->Shader.CurrentVertexProgram->VertexProgram;
+ else
+ vprog = ctx->VertexProgram.Current;
+
+ vp_outputs = vprog->Base.OutputsWritten;
+
+ /* These get generated in the setup routine regardless of the
+ * vertex program:
+ */
+ /* _NEW_POINT */
+ if (ctx->Point.PointSprite)
+ vp_outputs |= FRAG_BITS_TEX_ANY;
+
+ if (vp_outputs & (1 << VERT_RESULT_COL0))
+ fp_inputs |= FRAG_BIT_COL0;
+ if (vp_outputs & (1 << VERT_RESULT_COL1))
+ fp_inputs |= FRAG_BIT_COL1;
+
+ fp_inputs |= (((vp_outputs & VERT_RESULT_TEX_ANY) >> VERT_RESULT_TEX0)
+ << FRAG_ATTRIB_TEX0);
+ }
+
+ return fp_inputs;
+}
+
+
+/**
+ * Examine current texture environment state and generate a unique
+ * key to identify it.
+ */
+static GLuint make_state_key( struct gl_context *ctx, struct state_key *key )
+{
+ GLuint i, j;
+ GLbitfield inputs_referenced = FRAG_BIT_COL0;
+ const GLbitfield inputs_available = get_fp_input_mask( ctx );
+ GLuint keySize;
+
+ memset(key, 0, sizeof(*key));
+
+ /* _NEW_TEXTURE */
+ for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
+ const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
+ const struct gl_texture_object *texObj = texUnit->_Current;
+ const struct gl_tex_env_combine_state *comb = texUnit->_CurrentCombine;
+ GLenum format;
+
+ if (!texUnit->_ReallyEnabled || !texUnit->Enabled)
+ continue;
+
+ format = texObj->Image[0][texObj->BaseLevel]->_BaseFormat;
+
+ key->unit[i].enabled = 1;
+ key->enabled_units |= (1<<i);
+ key->nr_enabled_units = i + 1;
+ inputs_referenced |= FRAG_BIT_TEX(i);
+
+ key->unit[i].source_index =
+ translate_tex_src_bit(texUnit->_ReallyEnabled);
+
+ key->unit[i].shadow =
+ ((texObj->Sampler.CompareMode == GL_COMPARE_R_TO_TEXTURE) &&
+ ((format == GL_DEPTH_COMPONENT) ||
+ (format == GL_DEPTH_STENCIL_EXT)));
+
+ key->unit[i].NumArgsRGB = comb->_NumArgsRGB;
+ key->unit[i].NumArgsA = comb->_NumArgsA;
+
+ key->unit[i].ModeRGB =
+ translate_mode(texUnit->EnvMode, comb->ModeRGB);
+ key->unit[i].ModeA =
+ translate_mode(texUnit->EnvMode, comb->ModeA);
+
+ key->unit[i].ScaleShiftRGB = comb->ScaleShiftRGB;
+ key->unit[i].ScaleShiftA = comb->ScaleShiftA;
+
+ for (j = 0; j < MAX_COMBINER_TERMS; j++) {
+ key->unit[i].OptRGB[j].Operand = translate_operand(comb->OperandRGB[j]);
+ key->unit[i].OptA[j].Operand = translate_operand(comb->OperandA[j]);
+ key->unit[i].OptRGB[j].Source = translate_source(comb->SourceRGB[j]);
+ key->unit[i].OptA[j].Source = translate_source(comb->SourceA[j]);
+ }
+
+ if (key->unit[i].ModeRGB == MODE_BUMP_ENVMAP_ATI) {
+ /* requires some special translation */
+ key->unit[i].NumArgsRGB = 2;
+ key->unit[i].ScaleShiftRGB = 0;
+ key->unit[i].OptRGB[0].Operand = OPR_SRC_COLOR;
+ key->unit[i].OptRGB[0].Source = SRC_TEXTURE;
+ key->unit[i].OptRGB[1].Operand = OPR_SRC_COLOR;
+ key->unit[i].OptRGB[1].Source = texUnit->BumpTarget - GL_TEXTURE0 + SRC_TEXTURE0;
+ }
+
+ /* this is a back-door for enabling cylindrical texture wrap mode */
+ if (texObj->Priority == 0.125)
+ key->unit[i].texture_cyl_wrap = 1;
+ }
+
+ /* _NEW_LIGHT | _NEW_FOG */
+ if (texenv_doing_secondary_color(ctx)) {
+ key->separate_specular = 1;
+ inputs_referenced |= FRAG_BIT_COL1;
+ }
+
+ /* _NEW_FOG */
+ if (ctx->Fog.Enabled) {
+ key->fog_enabled = 1;
+ key->fog_mode = translate_fog_mode(ctx->Fog.Mode);
+ inputs_referenced |= FRAG_BIT_FOGC; /* maybe */
+ }
+
+ /* _NEW_BUFFERS */
+ key->num_draw_buffers = ctx->DrawBuffer->_NumColorDrawBuffers;
+
+ key->inputs_available = (inputs_available & inputs_referenced);
+
+ /* compute size of state key, ignoring unused texture units */
+ keySize = sizeof(*key) - sizeof(key->unit)
+ + key->nr_enabled_units * sizeof(key->unit[0]);
+
+ return keySize;
+}
+
+
+/**
+ * Use uregs to represent registers internally, translate to Mesa's
+ * expected formats on emit.
+ *
+ * NOTE: These are passed by value extensively in this file rather
+ * than as usual by pointer reference. If this disturbs you, try
+ * remembering they are just 32bits in size.
+ *
+ * GCC is smart enough to deal with these dword-sized structures in
+ * much the same way as if I had defined them as dwords and was using
+ * macros to access and set the fields. This is much nicer and easier
+ * to evolve.
+ */
+struct ureg {
+ GLuint file:4;
+ GLuint idx:8;
+ GLuint negatebase:1;
+ GLuint swz:12;
+ GLuint pad:7;
+};
+
+static const struct ureg undef = {
+ PROGRAM_UNDEFINED,
+ 255,
+ 0,
+ 0,
+ 0
+};
+
+
+/** State used to build the fragment program:
+ */
+struct texenv_fragment_program {
+ struct gl_fragment_program *program;
+ struct state_key *state;
+
+ GLbitfield alu_temps; /**< Track texture indirections, see spec. */
+ GLbitfield temps_output; /**< Track texture indirections, see spec. */
+ GLbitfield temp_in_use; /**< Tracks temporary regs which are in use. */
+ GLboolean error;
+
+ struct ureg src_texture[MAX_TEXTURE_COORD_UNITS];
+ /* Reg containing each texture unit's sampled texture color,
+ * else undef.
+ */
+
+ struct ureg texcoord_tex[MAX_TEXTURE_COORD_UNITS];
+ /* Reg containing texcoord for a texture unit,
+ * needed for bump mapping, else undef.
+ */
+
+ struct ureg src_previous; /**< Reg containing color from previous
+ * stage. May need to be decl'd.
+ */
+
+ GLuint last_tex_stage; /**< Number of last enabled texture unit */
+
+ struct ureg half;
+ struct ureg one;
+ struct ureg zero;
+};
+
+
+
+static struct ureg make_ureg(GLuint file, GLuint idx)
+{
+ struct ureg reg;
+ reg.file = file;
+ reg.idx = idx;
+ reg.negatebase = 0;
+ reg.swz = SWIZZLE_NOOP;
+ reg.pad = 0;
+ return reg;
+}
+
+static struct ureg swizzle( struct ureg reg, int x, int y, int z, int w )
+{
+ reg.swz = MAKE_SWIZZLE4(GET_SWZ(reg.swz, x),
+ GET_SWZ(reg.swz, y),
+ GET_SWZ(reg.swz, z),
+ GET_SWZ(reg.swz, w));
+
+ return reg;
+}
+
+static struct ureg swizzle1( struct ureg reg, int x )
+{
+ return swizzle(reg, x, x, x, x);
+}
+
+static struct ureg negate( struct ureg reg )
+{
+ reg.negatebase ^= 1;
+ return reg;
+}
+
+static GLboolean is_undef( struct ureg reg )
+{
+ return reg.file == PROGRAM_UNDEFINED;
+}
+
+
+static struct ureg get_temp( struct texenv_fragment_program *p )
+{
+ GLint bit;
+
+ /* First try and reuse temps which have been used already:
+ */
+ bit = _mesa_ffs( ~p->temp_in_use & p->alu_temps );
+
+ /* Then any unused temporary:
+ */
+ if (!bit)
+ bit = _mesa_ffs( ~p->temp_in_use );
+
+ if (!bit) {
+ _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__);
+ exit(1);
+ }
+
+ if ((GLuint) bit > p->program->Base.NumTemporaries)
+ p->program->Base.NumTemporaries = bit;
+
+ p->temp_in_use |= 1<<(bit-1);
+ return make_ureg(PROGRAM_TEMPORARY, (bit-1));
+}
+
+static struct ureg get_tex_temp( struct texenv_fragment_program *p )
+{
+ int bit;
+
+ /* First try to find available temp not previously used (to avoid
+ * starting a new texture indirection). According to the spec, the
+ * ~p->temps_output isn't necessary, but will keep it there for
+ * now:
+ */
+ bit = _mesa_ffs( ~p->temp_in_use & ~p->alu_temps & ~p->temps_output );
+
+ /* Then any unused temporary:
+ */
+ if (!bit)
+ bit = _mesa_ffs( ~p->temp_in_use );
+
+ if (!bit) {
+ _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__);
+ exit(1);
+ }
+
+ if ((GLuint) bit > p->program->Base.NumTemporaries)
+ p->program->Base.NumTemporaries = bit;
+
+ p->temp_in_use |= 1<<(bit-1);
+ return make_ureg(PROGRAM_TEMPORARY, (bit-1));
+}
+
+
+/** Mark a temp reg as being no longer allocatable. */
+static void reserve_temp( struct texenv_fragment_program *p, struct ureg r )
+{
+ if (r.file == PROGRAM_TEMPORARY)
+ p->temps_output |= (1 << r.idx);
+}
+
+
+static void release_temps(struct gl_context *ctx, struct texenv_fragment_program *p )
+{
+ GLuint max_temp = ctx->Const.FragmentProgram.MaxTemps;
+
+ /* KW: To support tex_env_crossbar, don't release the registers in
+ * temps_output.
+ */
+ if (max_temp >= sizeof(int) * 8)
+ p->temp_in_use = p->temps_output;
+ else
+ p->temp_in_use = ~((1<<max_temp)-1) | p->temps_output;
+}
+
+
+static struct ureg register_param5( struct texenv_fragment_program *p,
+ GLint s0,
+ GLint s1,
+ GLint s2,
+ GLint s3,
+ GLint s4)
+{
+ int tokens[STATE_LENGTH];
+ GLuint idx;
+ tokens[0] = s0;
+ tokens[1] = s1;
+ tokens[2] = s2;
+ tokens[3] = s3;
+ tokens[4] = s4;
+ idx = _mesa_add_state_reference(p->program->Base.Parameters,
+ (gl_state_index *)tokens);
+ return make_ureg(PROGRAM_STATE_VAR, idx);
+}
+
+
+#define register_param1(p,s0) register_param5(p,s0,0,0,0,0)
+#define register_param2(p,s0,s1) register_param5(p,s0,s1,0,0,0)
+#define register_param3(p,s0,s1,s2) register_param5(p,s0,s1,s2,0,0)
+#define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0)
+
+static GLuint frag_to_vert_attrib( GLuint attrib )
+{
+ switch (attrib) {
+ case FRAG_ATTRIB_COL0: return VERT_ATTRIB_COLOR0;
+ case FRAG_ATTRIB_COL1: return VERT_ATTRIB_COLOR1;
+ default:
+ assert(attrib >= FRAG_ATTRIB_TEX0);
+ assert(attrib <= FRAG_ATTRIB_TEX7);
+ return attrib - FRAG_ATTRIB_TEX0 + VERT_ATTRIB_TEX0;
+ }
+}
+
+
+static struct ureg register_input( struct texenv_fragment_program *p, GLuint input )
+{
+ if (p->state->inputs_available & (1<<input)) {
+ p->program->Base.InputsRead |= (1 << input);
+ return make_ureg(PROGRAM_INPUT, input);
+ }
+ else {
+ GLuint idx = frag_to_vert_attrib( input );
+ return register_param3( p, STATE_INTERNAL, STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED, idx );
+ }
+}
+
+
+static void emit_arg( struct prog_src_register *reg,
+ struct ureg ureg )
+{
+ reg->File = ureg.file;
+ reg->Index = ureg.idx;
+ reg->Swizzle = ureg.swz;
+ reg->Negate = ureg.negatebase ? NEGATE_XYZW : NEGATE_NONE;
+ reg->Abs = GL_FALSE;
+}
+
+static void emit_dst( struct prog_dst_register *dst,
+ struct ureg ureg, GLuint mask )
+{
+ dst->File = ureg.file;
+ dst->Index = ureg.idx;
+ dst->WriteMask = mask;
+ dst->CondMask = COND_TR; /* always pass cond test */
+ dst->CondSwizzle = SWIZZLE_NOOP;
+}
+
+static struct prog_instruction *
+emit_op(struct texenv_fragment_program *p,
+ enum prog_opcode op,
+ struct ureg dest,
+ GLuint mask,
+ GLboolean saturate,
+ struct ureg src0,
+ struct ureg src1,
+ struct ureg src2 )
+{
+ const GLuint nr = p->program->Base.NumInstructions++;
+ struct prog_instruction *inst = &p->program->Base.Instructions[nr];
+
+ assert(nr < MAX_INSTRUCTIONS);
+
+ _mesa_init_instructions(inst, 1);
+ inst->Opcode = op;
+
+ emit_arg( &inst->SrcReg[0], src0 );
+ emit_arg( &inst->SrcReg[1], src1 );
+ emit_arg( &inst->SrcReg[2], src2 );
+
+ inst->SaturateMode = saturate ? SATURATE_ZERO_ONE : SATURATE_OFF;
+
+ emit_dst( &inst->DstReg, dest, mask );
+
+#if 0
+ /* Accounting for indirection tracking:
+ */
+ if (dest.file == PROGRAM_TEMPORARY)
+ p->temps_output |= 1 << dest.idx;
+#endif
+
+ return inst;
+}
+
+
+static struct ureg emit_arith( struct texenv_fragment_program *p,
+ enum prog_opcode op,
+ struct ureg dest,
+ GLuint mask,
+ GLboolean saturate,
+ struct ureg src0,
+ struct ureg src1,
+ struct ureg src2 )
+{
+ emit_op(p, op, dest, mask, saturate, src0, src1, src2);
+
+ /* Accounting for indirection tracking:
+ */
+ if (src0.file == PROGRAM_TEMPORARY)
+ p->alu_temps |= 1 << src0.idx;
+
+ if (!is_undef(src1) && src1.file == PROGRAM_TEMPORARY)
+ p->alu_temps |= 1 << src1.idx;
+
+ if (!is_undef(src2) && src2.file == PROGRAM_TEMPORARY)
+ p->alu_temps |= 1 << src2.idx;
+
+ if (dest.file == PROGRAM_TEMPORARY)
+ p->alu_temps |= 1 << dest.idx;
+
+ p->program->Base.NumAluInstructions++;
+ return dest;
+}
+
+static struct ureg emit_texld( struct texenv_fragment_program *p,
+ enum prog_opcode op,
+ struct ureg dest,
+ GLuint destmask,
+ GLuint tex_unit,
+ GLuint tex_idx,
+ GLuint tex_shadow,
+ struct ureg coord )
+{
+ struct prog_instruction *inst = emit_op( p, op,
+ dest, destmask,
+ GL_FALSE, /* don't saturate? */
+ coord, /* arg 0? */
+ undef,
+ undef);
+
+ inst->TexSrcTarget = tex_idx;
+ inst->TexSrcUnit = tex_unit;
+ inst->TexShadow = tex_shadow;
+
+ p->program->Base.NumTexInstructions++;
+
+ /* Accounting for indirection tracking:
+ */
+ reserve_temp(p, dest);
+
+#if 0
+ /* Is this a texture indirection?
+ */
+ if ((coord.file == PROGRAM_TEMPORARY &&
+ (p->temps_output & (1<<coord.idx))) ||
+ (dest.file == PROGRAM_TEMPORARY &&
+ (p->alu_temps & (1<<dest.idx)))) {
+ p->program->Base.NumTexIndirections++;
+ p->temps_output = 1<<coord.idx;
+ p->alu_temps = 0;
+ assert(0); /* KW: texture env crossbar */
+ }
+#endif
+
+ return dest;
+}
+
+
+static struct ureg register_const4f( struct texenv_fragment_program *p,
+ GLfloat s0,
+ GLfloat s1,
+ GLfloat s2,
+ GLfloat s3)
+{
+ GLfloat values[4];
+ GLuint idx, swizzle;
+ struct ureg r;
+ values[0] = s0;
+ values[1] = s1;
+ values[2] = s2;
+ values[3] = s3;
+ idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4,
+ &swizzle );
+ r = make_ureg(PROGRAM_CONSTANT, idx);
+ r.swz = swizzle;
+ return r;
+}
+
+#define register_scalar_const(p, s0) register_const4f(p, s0, s0, s0, s0)
+#define register_const1f(p, s0) register_const4f(p, s0, 0, 0, 1)
+#define register_const2f(p, s0, s1) register_const4f(p, s0, s1, 0, 1)
+#define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1)
+
+
+static struct ureg get_one( struct texenv_fragment_program *p )
+{
+ if (is_undef(p->one))
+ p->one = register_scalar_const(p, 1.0);
+ return p->one;
+}
+
+static struct ureg get_half( struct texenv_fragment_program *p )
+{
+ if (is_undef(p->half))
+ p->half = register_scalar_const(p, 0.5);
+ return p->half;
+}
+
+static struct ureg get_zero( struct texenv_fragment_program *p )
+{
+ if (is_undef(p->zero))
+ p->zero = register_scalar_const(p, 0.0);
+ return p->zero;
+}
+
+
+static void program_error( struct texenv_fragment_program *p, const char *msg )
+{
+ _mesa_problem(NULL, "%s", msg);
+ p->error = 1;
+}
+
+static struct ureg get_source( struct texenv_fragment_program *p,
+ GLuint src, GLuint unit )
+{
+ switch (src) {
+ case SRC_TEXTURE:
+ assert(!is_undef(p->src_texture[unit]));
+ return p->src_texture[unit];
+
+ case SRC_TEXTURE0:
+ case SRC_TEXTURE1:
+ case SRC_TEXTURE2:
+ case SRC_TEXTURE3:
+ case SRC_TEXTURE4:
+ case SRC_TEXTURE5:
+ case SRC_TEXTURE6:
+ case SRC_TEXTURE7:
+ assert(!is_undef(p->src_texture[src - SRC_TEXTURE0]));
+ return p->src_texture[src - SRC_TEXTURE0];
+
+ case SRC_CONSTANT:
+ return register_param2(p, STATE_TEXENV_COLOR, unit);
+
+ case SRC_PRIMARY_COLOR:
+ return register_input(p, FRAG_ATTRIB_COL0);
+
+ case SRC_ZERO:
+ return get_zero(p);
+
+ case SRC_PREVIOUS:
+ if (is_undef(p->src_previous))
+ return register_input(p, FRAG_ATTRIB_COL0);
+ else
+ return p->src_previous;
+
+ default:
+ assert(0);
+ return undef;
+ }
+}
+
+static struct ureg emit_combine_source( struct texenv_fragment_program *p,
+ GLuint mask,
+ GLuint unit,
+ GLuint source,
+ GLuint operand )
+{
+ struct ureg arg, src, one;
+
+ src = get_source(p, source, unit);
+
+ switch (operand) {
+ case OPR_ONE_MINUS_SRC_COLOR:
+ /* Get unused tmp,
+ * Emit tmp = 1.0 - arg.xyzw
+ */
+ arg = get_temp( p );
+ one = get_one( p );
+ return emit_arith( p, OPCODE_SUB, arg, mask, 0, one, src, undef);
+
+ case OPR_SRC_ALPHA:
+ if (mask == WRITEMASK_W)
+ return src;
+ else
+ return swizzle1( src, SWIZZLE_W );
+ case OPR_ONE_MINUS_SRC_ALPHA:
+ /* Get unused tmp,
+ * Emit tmp = 1.0 - arg.wwww
+ */
+ arg = get_temp(p);
+ one = get_one(p);
+ return emit_arith(p, OPCODE_SUB, arg, mask, 0,
+ one, swizzle1(src, SWIZZLE_W), undef);
+ case OPR_ZERO:
+ return get_zero(p);
+ case OPR_ONE:
+ return get_one(p);
+ case OPR_SRC_COLOR:
+ return src;
+ default:
+ assert(0);
+ return src;
+ }
+}
+
+/**
+ * Check if the RGB and Alpha sources and operands match for the given
+ * texture unit's combinder state. When the RGB and A sources and
+ * operands match, we can emit fewer instructions.
+ */
+static GLboolean args_match( const struct state_key *key, GLuint unit )
+{
+ GLuint i, numArgs = key->unit[unit].NumArgsRGB;
+
+ for (i = 0; i < numArgs; i++) {
+ if (key->unit[unit].OptA[i].Source != key->unit[unit].OptRGB[i].Source)
+ return GL_FALSE;
+
+ switch (key->unit[unit].OptA[i].Operand) {
+ case OPR_SRC_ALPHA:
+ switch (key->unit[unit].OptRGB[i].Operand) {
+ case OPR_SRC_COLOR:
+ case OPR_SRC_ALPHA:
+ break;
+ default:
+ return GL_FALSE;
+ }
+ break;
+ case OPR_ONE_MINUS_SRC_ALPHA:
+ switch (key->unit[unit].OptRGB[i].Operand) {
+ case OPR_ONE_MINUS_SRC_COLOR:
+ case OPR_ONE_MINUS_SRC_ALPHA:
+ break;
+ default:
+ return GL_FALSE;
+ }
+ break;
+ default:
+ return GL_FALSE; /* impossible */
+ }
+ }
+
+ return GL_TRUE;
+}
+
+static struct ureg emit_combine( struct texenv_fragment_program *p,
+ struct ureg dest,
+ GLuint mask,
+ GLboolean saturate,
+ GLuint unit,
+ GLuint nr,
+ GLuint mode,
+ const struct mode_opt *opt)
+{
+ struct ureg src[MAX_COMBINER_TERMS];
+ struct ureg tmp, half;
+ GLuint i;
+
+ assert(nr <= MAX_COMBINER_TERMS);
+
+ for (i = 0; i < nr; i++)
+ src[i] = emit_combine_source( p, mask, unit, opt[i].Source, opt[i].Operand );
+
+ switch (mode) {
+ case MODE_REPLACE:
+ if (mask == WRITEMASK_XYZW && !saturate)
+ return src[0];
+ else
+ return emit_arith( p, OPCODE_MOV, dest, mask, saturate, src[0], undef, undef );
+ case MODE_MODULATE:
+ return emit_arith( p, OPCODE_MUL, dest, mask, saturate,
+ src[0], src[1], undef );
+ case MODE_ADD:
+ return emit_arith( p, OPCODE_ADD, dest, mask, saturate,
+ src[0], src[1], undef );
+ case MODE_ADD_SIGNED:
+ /* tmp = arg0 + arg1
+ * result = tmp - .5
+ */
+ half = get_half(p);
+ tmp = get_temp( p );
+ emit_arith( p, OPCODE_ADD, tmp, mask, 0, src[0], src[1], undef );
+ emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp, half, undef );
+ return dest;
+ case MODE_INTERPOLATE:
+ /* Arg0 * (Arg2) + Arg1 * (1-Arg2) -- note arguments are reordered:
+ */
+ return emit_arith( p, OPCODE_LRP, dest, mask, saturate, src[2], src[0], src[1] );
+
+ case MODE_SUBTRACT:
+ return emit_arith( p, OPCODE_SUB, dest, mask, saturate, src[0], src[1], undef );
+
+ case MODE_DOT3_RGBA:
+ case MODE_DOT3_RGBA_EXT:
+ case MODE_DOT3_RGB_EXT:
+ case MODE_DOT3_RGB: {
+ struct ureg tmp0 = get_temp( p );
+ struct ureg tmp1 = get_temp( p );
+ struct ureg neg1 = register_scalar_const(p, -1);
+ struct ureg two = register_scalar_const(p, 2);
+
+ /* tmp0 = 2*src0 - 1
+ * tmp1 = 2*src1 - 1
+ *
+ * dst = tmp0 dot3 tmp1
+ */
+ emit_arith( p, OPCODE_MAD, tmp0, WRITEMASK_XYZW, 0,
+ two, src[0], neg1);
+
+ if (memcmp(&src[0], &src[1], sizeof(struct ureg)) == 0)
+ tmp1 = tmp0;
+ else
+ emit_arith( p, OPCODE_MAD, tmp1, WRITEMASK_XYZW, 0,
+ two, src[1], neg1);
+ emit_arith( p, OPCODE_DP3, dest, mask, saturate, tmp0, tmp1, undef);
+ return dest;
+ }
+ case MODE_MODULATE_ADD_ATI:
+ /* Arg0 * Arg2 + Arg1 */
+ return emit_arith( p, OPCODE_MAD, dest, mask, saturate,
+ src[0], src[2], src[1] );
+ case MODE_MODULATE_SIGNED_ADD_ATI: {
+ /* Arg0 * Arg2 + Arg1 - 0.5 */
+ struct ureg tmp0 = get_temp(p);
+ half = get_half(p);
+ emit_arith( p, OPCODE_MAD, tmp0, mask, 0, src[0], src[2], src[1] );
+ emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp0, half, undef );
+ return dest;
+ }
+ case MODE_MODULATE_SUBTRACT_ATI:
+ /* Arg0 * Arg2 - Arg1 */
+ emit_arith( p, OPCODE_MAD, dest, mask, 0, src[0], src[2], negate(src[1]) );
+ return dest;
+ case MODE_ADD_PRODUCTS:
+ /* Arg0 * Arg1 + Arg2 * Arg3 */
+ {
+ struct ureg tmp0 = get_temp(p);
+ emit_arith( p, OPCODE_MUL, tmp0, mask, 0, src[0], src[1], undef );
+ emit_arith( p, OPCODE_MAD, dest, mask, saturate, src[2], src[3], tmp0 );
+ }
+ return dest;
+ case MODE_ADD_PRODUCTS_SIGNED:
+ /* Arg0 * Arg1 + Arg2 * Arg3 - 0.5 */
+ {
+ struct ureg tmp0 = get_temp(p);
+ half = get_half(p);
+ emit_arith( p, OPCODE_MUL, tmp0, mask, 0, src[0], src[1], undef );
+ emit_arith( p, OPCODE_MAD, tmp0, mask, 0, src[2], src[3], tmp0 );
+ emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp0, half, undef );
+ }
+ return dest;
+ case MODE_BUMP_ENVMAP_ATI:
+ /* special - not handled here */
+ assert(0);
+ return src[0];
+ default:
+ assert(0);
+ return src[0];
+ }
+}
+
+
+/**
+ * Generate instructions for one texture unit's env/combiner mode.
+ */
+static struct ureg
+emit_texenv(struct texenv_fragment_program *p, GLuint unit)
+{
+ const struct state_key *key = p->state;
+ GLboolean rgb_saturate, alpha_saturate;
+ GLuint rgb_shift, alpha_shift;
+ struct ureg out, dest;
+
+ if (!key->unit[unit].enabled) {
+ return get_source(p, SRC_PREVIOUS, 0);
+ }
+ if (key->unit[unit].ModeRGB == MODE_BUMP_ENVMAP_ATI) {
+ /* this isn't really a env stage delivering a color and handled elsewhere */
+ return get_source(p, SRC_PREVIOUS, 0);
+ }
+
+ switch (key->unit[unit].ModeRGB) {
+ case MODE_DOT3_RGB_EXT:
+ alpha_shift = key->unit[unit].ScaleShiftA;
+ rgb_shift = 0;
+ break;
+ case MODE_DOT3_RGBA_EXT:
+ alpha_shift = 0;
+ rgb_shift = 0;
+ break;
+ default:
+ rgb_shift = key->unit[unit].ScaleShiftRGB;
+ alpha_shift = key->unit[unit].ScaleShiftA;
+ break;
+ }
+
+ /* If we'll do rgb/alpha shifting don't saturate in emit_combine().
+ * We don't want to clamp twice.
+ */
+ if (rgb_shift)
+ rgb_saturate = GL_FALSE; /* saturate after rgb shift */
+ else if (need_saturate(key->unit[unit].ModeRGB))
+ rgb_saturate = GL_TRUE;
+ else
+ rgb_saturate = GL_FALSE;
+
+ if (alpha_shift)
+ alpha_saturate = GL_FALSE; /* saturate after alpha shift */
+ else if (need_saturate(key->unit[unit].ModeA))
+ alpha_saturate = GL_TRUE;
+ else
+ alpha_saturate = GL_FALSE;
+
+ /* If this is the very last calculation (and various other conditions
+ * are met), emit directly to the color output register. Otherwise,
+ * emit to a temporary register.
+ */
+ if (key->separate_specular ||
+ unit != p->last_tex_stage ||
+ alpha_shift ||
+ key->num_draw_buffers != 1 ||
+ rgb_shift)
+ dest = get_temp( p );
+ else
+ dest = make_ureg(PROGRAM_OUTPUT, FRAG_RESULT_COLOR);
+
+ /* Emit the RGB and A combine ops
+ */
+ if (key->unit[unit].ModeRGB == key->unit[unit].ModeA &&
+ args_match(key, unit)) {
+ out = emit_combine( p, dest, WRITEMASK_XYZW, rgb_saturate,
+ unit,
+ key->unit[unit].NumArgsRGB,
+ key->unit[unit].ModeRGB,
+ key->unit[unit].OptRGB);
+ }
+ else if (key->unit[unit].ModeRGB == MODE_DOT3_RGBA_EXT ||
+ key->unit[unit].ModeRGB == MODE_DOT3_RGBA) {
+ out = emit_combine( p, dest, WRITEMASK_XYZW, rgb_saturate,
+ unit,
+ key->unit[unit].NumArgsRGB,
+ key->unit[unit].ModeRGB,
+ key->unit[unit].OptRGB);
+ }
+ else {
+ /* Need to do something to stop from re-emitting identical
+ * argument calculations here:
+ */
+ out = emit_combine( p, dest, WRITEMASK_XYZ, rgb_saturate,
+ unit,
+ key->unit[unit].NumArgsRGB,
+ key->unit[unit].ModeRGB,
+ key->unit[unit].OptRGB);
+ out = emit_combine( p, dest, WRITEMASK_W, alpha_saturate,
+ unit,
+ key->unit[unit].NumArgsA,
+ key->unit[unit].ModeA,
+ key->unit[unit].OptA);
+ }
+
+ /* Deal with the final shift:
+ */
+ if (alpha_shift || rgb_shift) {
+ struct ureg shift;
+ GLboolean saturate = GL_TRUE; /* always saturate at this point */
+
+ if (rgb_shift == alpha_shift) {
+ shift = register_scalar_const(p, (GLfloat)(1<<rgb_shift));
+ }
+ else {
+ shift = register_const4f(p,
+ (GLfloat)(1<<rgb_shift),
+ (GLfloat)(1<<rgb_shift),
+ (GLfloat)(1<<rgb_shift),
+ (GLfloat)(1<<alpha_shift));
+ }
+ return emit_arith( p, OPCODE_MUL, dest, WRITEMASK_XYZW,
+ saturate, out, shift, undef );
+ }
+ else
+ return out;
+}
+
+
+/**
+ * Generate instruction for getting a texture source term.
+ */
+static void load_texture( struct texenv_fragment_program *p, GLuint unit )
+{
+ if (is_undef(p->src_texture[unit])) {
+ const GLuint texTarget = p->state->unit[unit].source_index;
+ struct ureg texcoord;
+ struct ureg tmp = get_tex_temp( p );
+
+ if (is_undef(p->texcoord_tex[unit])) {
+ texcoord = register_input(p, FRAG_ATTRIB_TEX0+unit);
+ }
+ else {
+ /* might want to reuse this reg for tex output actually */
+ texcoord = p->texcoord_tex[unit];
+ }
+
+ /* TODO: Use D0_MASK_XY where possible.
+ */
+ if (p->state->unit[unit].enabled) {
+ GLboolean shadow = GL_FALSE;
+
+ if (p->state->unit[unit].shadow) {
+ p->program->Base.ShadowSamplers |= 1 << unit;
+ shadow = GL_TRUE;
+ }
+
+ p->src_texture[unit] = emit_texld( p, OPCODE_TXP,
+ tmp, WRITEMASK_XYZW,
+ unit, texTarget, shadow,
+ texcoord );
+
+ p->program->Base.SamplersUsed |= (1 << unit);
+ /* This identity mapping should already be in place
+ * (see _mesa_init_program_struct()) but let's be safe.
+ */
+ p->program->Base.SamplerUnits[unit] = unit;
+ }
+ else
+ p->src_texture[unit] = get_zero(p);
+
+ if (p->state->unit[unit].texture_cyl_wrap) {
+ /* set flag which is checked by Mesa->Gallium program translation */
+ p->program->Base.InputFlags[0] |= PROG_PARAM_BIT_CYL_WRAP;
+ }
+
+ }
+}
+
+static GLboolean load_texenv_source( struct texenv_fragment_program *p,
+ GLuint src, GLuint unit )
+{
+ switch (src) {
+ case SRC_TEXTURE:
+ load_texture(p, unit);
+ break;
+
+ case SRC_TEXTURE0:
+ case SRC_TEXTURE1:
+ case SRC_TEXTURE2:
+ case SRC_TEXTURE3:
+ case SRC_TEXTURE4:
+ case SRC_TEXTURE5:
+ case SRC_TEXTURE6:
+ case SRC_TEXTURE7:
+ load_texture(p, src - SRC_TEXTURE0);
+ break;
+
+ default:
+ /* not a texture src - do nothing */
+ break;
+ }
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Generate instructions for loading all texture source terms.
+ */
+static GLboolean
+load_texunit_sources( struct texenv_fragment_program *p, GLuint unit )
+{
+ const struct state_key *key = p->state;
+ GLuint i;
+
+ for (i = 0; i < key->unit[unit].NumArgsRGB; i++) {
+ load_texenv_source( p, key->unit[unit].OptRGB[i].Source, unit );
+ }
+
+ for (i = 0; i < key->unit[unit].NumArgsA; i++) {
+ load_texenv_source( p, key->unit[unit].OptA[i].Source, unit );
+ }
+
+ return GL_TRUE;
+}
+
+/**
+ * Generate instructions for loading bump map textures.
+ */
+static GLboolean
+load_texunit_bumpmap( struct texenv_fragment_program *p, GLuint unit )
+{
+ const struct state_key *key = p->state;
+ GLuint bumpedUnitNr = key->unit[unit].OptRGB[1].Source - SRC_TEXTURE0;
+ struct ureg texcDst, bumpMapRes;
+ struct ureg constdudvcolor = register_const4f(p, 0.0, 0.0, 0.0, 1.0);
+ struct ureg texcSrc = register_input(p, FRAG_ATTRIB_TEX0 + bumpedUnitNr);
+ struct ureg rotMat0 = register_param3( p, STATE_INTERNAL, STATE_ROT_MATRIX_0, unit );
+ struct ureg rotMat1 = register_param3( p, STATE_INTERNAL, STATE_ROT_MATRIX_1, unit );
+
+ load_texenv_source( p, unit + SRC_TEXTURE0, unit );
+
+ bumpMapRes = get_source(p, key->unit[unit].OptRGB[0].Source, unit);
+ texcDst = get_tex_temp( p );
+ p->texcoord_tex[bumpedUnitNr] = texcDst;
+
+ /* Apply rot matrix and add coords to be available in next phase.
+ * dest = (Arg0.xxxx * rotMat0 + Arg1) + (Arg0.yyyy * rotMat1)
+ * note only 2 coords are affected the rest are left unchanged (mul by 0)
+ */
+ emit_arith( p, OPCODE_MAD, texcDst, WRITEMASK_XYZW, 0,
+ swizzle1(bumpMapRes, SWIZZLE_X), rotMat0, texcSrc );
+ emit_arith( p, OPCODE_MAD, texcDst, WRITEMASK_XYZW, 0,
+ swizzle1(bumpMapRes, SWIZZLE_Y), rotMat1, texcDst );
+
+ /* Move 0,0,0,1 into bumpmap src if someone (crossbar) is foolish
+ * enough to access this later, should optimize away.
+ */
+ emit_arith( p, OPCODE_MOV, bumpMapRes, WRITEMASK_XYZW, 0,
+ constdudvcolor, undef, undef );
+
+ return GL_TRUE;
+}
+
+/**
+ * Generate a new fragment program which implements the context's
+ * current texture env/combine mode.
+ */
+static void
+create_new_program(struct gl_context *ctx, struct state_key *key,
+ struct gl_fragment_program *program)
+{
+ struct prog_instruction instBuffer[MAX_INSTRUCTIONS];
+ struct texenv_fragment_program p;
+ GLuint unit;
+ struct ureg cf, out;
+ int i;
+
+ memset(&p, 0, sizeof(p));
+ p.state = key;
+ p.program = program;
+
+ /* During code generation, use locally-allocated instruction buffer,
+ * then alloc dynamic storage below.
+ */
+ p.program->Base.Instructions = instBuffer;
+ p.program->Base.Target = GL_FRAGMENT_PROGRAM_ARB;
+ p.program->Base.String = NULL;
+ p.program->Base.NumTexIndirections = 1; /* is this right? */
+ p.program->Base.NumTexInstructions = 0;
+ p.program->Base.NumAluInstructions = 0;
+ p.program->Base.NumInstructions = 0;
+ p.program->Base.NumTemporaries = 0;
+ p.program->Base.NumParameters = 0;
+ p.program->Base.NumAttributes = 0;
+ p.program->Base.NumAddressRegs = 0;
+ p.program->Base.Parameters = _mesa_new_parameter_list();
+ p.program->Base.InputsRead = 0x0;
+
+ if (key->num_draw_buffers == 1)
+ p.program->Base.OutputsWritten = 1 << FRAG_RESULT_COLOR;
+ else {
+ for (i = 0; i < key->num_draw_buffers; i++)
+ p.program->Base.OutputsWritten |= (1 << (FRAG_RESULT_DATA0 + i));
+ }
+
+ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+ p.src_texture[unit] = undef;
+ p.texcoord_tex[unit] = undef;
+ }
+
+ p.src_previous = undef;
+ p.half = undef;
+ p.zero = undef;
+ p.one = undef;
+
+ p.last_tex_stage = 0;
+ release_temps(ctx, &p);
+
+ if (key->enabled_units && key->num_draw_buffers) {
+ GLboolean needbumpstage = GL_FALSE;
+
+ /* Zeroth pass - bump map textures first */
+ for (unit = 0; unit < key->nr_enabled_units; unit++)
+ if (key->unit[unit].enabled &&
+ key->unit[unit].ModeRGB == MODE_BUMP_ENVMAP_ATI) {
+ needbumpstage = GL_TRUE;
+ load_texunit_bumpmap( &p, unit );
+ }
+ if (needbumpstage)
+ p.program->Base.NumTexIndirections++;
+
+ /* First pass - to support texture_env_crossbar, first identify
+ * all referenced texture sources and emit texld instructions
+ * for each:
+ */
+ for (unit = 0; unit < key->nr_enabled_units; unit++)
+ if (key->unit[unit].enabled) {
+ load_texunit_sources( &p, unit );
+ p.last_tex_stage = unit;
+ }
+
+ /* Second pass - emit combine instructions to build final color:
+ */
+ for (unit = 0; unit < key->nr_enabled_units; unit++)
+ if (key->unit[unit].enabled) {
+ p.src_previous = emit_texenv( &p, unit );
+ reserve_temp(&p, p.src_previous); /* don't re-use this temp reg */
+ release_temps(ctx, &p); /* release all temps */
+ }
+ }
+
+ cf = get_source( &p, SRC_PREVIOUS, 0 );
+
+ for (i = 0; i < key->num_draw_buffers; i++) {
+ if (key->num_draw_buffers == 1)
+ out = make_ureg( PROGRAM_OUTPUT, FRAG_RESULT_COLOR );
+ else {
+ out = make_ureg( PROGRAM_OUTPUT, FRAG_RESULT_DATA0 + i );
+ }
+
+ if (key->separate_specular) {
+ /* Emit specular add.
+ */
+ struct ureg s = register_input(&p, FRAG_ATTRIB_COL1);
+ emit_arith( &p, OPCODE_ADD, out, WRITEMASK_XYZ, 0, cf, s, undef );
+ emit_arith( &p, OPCODE_MOV, out, WRITEMASK_W, 0, cf, undef, undef );
+ }
+ else if (memcmp(&cf, &out, sizeof(cf)) != 0) {
+ /* Will wind up in here if no texture enabled or a couple of
+ * other scenarios (GL_REPLACE for instance).
+ */
+ emit_arith( &p, OPCODE_MOV, out, WRITEMASK_XYZW, 0, cf, undef, undef );
+ }
+ }
+ /* Finish up:
+ */
+ emit_arith( &p, OPCODE_END, undef, WRITEMASK_XYZW, 0, undef, undef, undef);
+
+ /* Allocate final instruction array. This has to be done before calling
+ * _mesa_append_fog_code because that function frees the Base.Instructions.
+ * At this point, Base.Instructions points to stack data, so it's a really
+ * bad idea to free it.
+ */
+ p.program->Base.Instructions
+ = _mesa_alloc_instructions(p.program->Base.NumInstructions);
+ if (!p.program->Base.Instructions) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY,
+ "generating tex env program");
+ return;
+ }
+ _mesa_copy_instructions(p.program->Base.Instructions, instBuffer,
+ p.program->Base.NumInstructions);
+
+ /* Append fog code. This must be done before checking the program against
+ * the limits becuase it will potentially add some instructions.
+ */
+ if (key->fog_enabled) {
+ _mesa_append_fog_code(ctx, p.program, ctx->Fog.Mode, GL_FALSE);
+ }
+
+ if (p.program->Base.NumTexIndirections > ctx->Const.FragmentProgram.MaxTexIndirections)
+ program_error(&p, "Exceeded max nr indirect texture lookups");
+
+ if (p.program->Base.NumTexInstructions > ctx->Const.FragmentProgram.MaxTexInstructions)
+ program_error(&p, "Exceeded max TEX instructions");
+
+ if (p.program->Base.NumAluInstructions > ctx->Const.FragmentProgram.MaxAluInstructions)
+ program_error(&p, "Exceeded max ALU instructions");
+
+ ASSERT(p.program->Base.NumInstructions <= MAX_INSTRUCTIONS);
+
+ /* Notify driver the fragment program has (actually) changed.
+ */
+ if (ctx->Driver.ProgramStringNotify) {
+ GLboolean ok = ctx->Driver.ProgramStringNotify(ctx,
+ GL_FRAGMENT_PROGRAM_ARB,
+ &p.program->Base);
+ /* Driver should be able to handle any texenv programs as long as
+ * the driver correctly reported max number of texture units correctly,
+ * etc.
+ */
+ ASSERT(ok);
+ (void) ok; /* silence unused var warning */
+ }
+
+ if (DISASSEM) {
+ _mesa_print_program(&p.program->Base);
+ printf("\n");
+ }
+}
+
+extern "C" {
+
+/**
+ * Return a fragment program which implements the current
+ * fixed-function texture, fog and color-sum operations.
+ */
+struct gl_fragment_program *
+_mesa_get_fixed_func_fragment_program(struct gl_context *ctx)
+{
+ struct gl_fragment_program *prog;
+ struct state_key key;
+ GLuint keySize;
+
+ keySize = make_state_key(ctx, &key);
+
+ prog = (struct gl_fragment_program *)
+ _mesa_search_program_cache(ctx->FragmentProgram.Cache,
+ &key, keySize);
+
+ if (!prog) {
+ prog = (struct gl_fragment_program *)
+ ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
+
+ create_new_program(ctx, &key, prog);
+
+ _mesa_program_cache_insert(ctx, ctx->FragmentProgram.Cache,
+ &key, keySize, &prog->Base);
+ }
+
+ return prog;
+}
+
+}
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