diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_texstate.c')
| -rw-r--r-- | nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_texstate.c | 716 |
1 files changed, 716 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_texstate.c b/nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_texstate.c new file mode 100644 index 000000000..358c554f3 --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_texstate.c @@ -0,0 +1,716 @@ +/************************************************************************** + +Copyright 2001 2d3d Inc., Delray Beach, FL + +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 +on 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 +ATI, VA LINUX SYSTEMS AND/OR THEIR 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. + +**************************************************************************/ + +/* $XFree86: xc/lib/GL/mesa/src/drv/i830/i830_texstate.c,v 1.3 2002/12/10 01:26:53 dawes Exp $ */ + +/** + * \file i830_texstate.c + * + * Heavily based on the I810 driver, which was written by Keith Whitwell. + * + * \author Jeff Hartmann <jhartmann@2d3d.com> + * \author Keith Whitwell <keithw@tungstengraphics.com> + */ + +#include "glheader.h" +#include "macros.h" +#include "mtypes.h" +#include "simple_list.h" +#include "enums.h" +#include "texformat.h" +#include "texstore.h" + +#include "mm.h" + +#include "i830_screen.h" +#include "i830_dri.h" + +#include "i830_context.h" +#include "i830_tex.h" +#include "i830_state.h" +#include "i830_ioctl.h" + +#define I830_TEX_UNIT_ENABLED(unit) (1<<unit) + +static void i830SetTexImages( i830ContextPtr imesa, + struct gl_texture_object *tObj ) +{ + GLuint total_height, pitch, i, textureFormat; + i830TextureObjectPtr t = (i830TextureObjectPtr) tObj->DriverData; + const struct gl_texture_image *baseImage = tObj->Image[0][tObj->BaseLevel]; + GLint numLevels; + + switch( baseImage->TexFormat->MesaFormat ) { + case MESA_FORMAT_L8: + t->texelBytes = 1; + textureFormat = MAPSURF_8BIT | MT_8BIT_L8; + break; + + case MESA_FORMAT_I8: + t->texelBytes = 1; + textureFormat = MAPSURF_8BIT | MT_8BIT_I8; + break; + + case MESA_FORMAT_AL88: + t->texelBytes = 2; + textureFormat = MAPSURF_16BIT | MT_16BIT_AY88; + break; + + case MESA_FORMAT_RGB565: + t->texelBytes = 2; + textureFormat = MAPSURF_16BIT | MT_16BIT_RGB565; + break; + + case MESA_FORMAT_ARGB1555: + t->texelBytes = 2; + textureFormat = MAPSURF_16BIT | MT_16BIT_ARGB1555; + break; + + case MESA_FORMAT_ARGB4444: + t->texelBytes = 2; + textureFormat = MAPSURF_16BIT | MT_16BIT_ARGB4444; + break; + + case MESA_FORMAT_ARGB8888: + t->texelBytes = 4; + textureFormat = MAPSURF_32BIT | MT_32BIT_ARGB8888; + break; + + case MESA_FORMAT_YCBCR_REV: + t->texelBytes = 2; + textureFormat = (MAPSURF_422 | MT_422_YCRCB_NORMAL | + TM0S1_COLORSPACE_CONVERSION); + break; + + case MESA_FORMAT_YCBCR: + t->texelBytes = 2; + textureFormat = (MAPSURF_422 | MT_422_YCRCB_SWAPY | /* ??? */ + TM0S1_COLORSPACE_CONVERSION); + break; + + case MESA_FORMAT_RGB_FXT1: + case MESA_FORMAT_RGBA_FXT1: + t->texelBytes = 2; + textureFormat = (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1); + break; + case MESA_FORMAT_RGBA_DXT1: + case MESA_FORMAT_RGB_DXT1: + /* + * DXTn pitches are Width/4 * blocksize in bytes + * for DXT1: blocksize=8 so Width/4*8 = Width * 2 + * for DXT3/5: blocksize=16 so Width/4*16 = Width * 4 + */ + t->texelBytes = 2; + textureFormat = (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1); + break; + case MESA_FORMAT_RGBA_DXT3: + t->texelBytes = 4; + textureFormat = (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3); + break; + case MESA_FORMAT_RGBA_DXT5: + t->texelBytes = 4; + textureFormat = (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5); + break; + default: + fprintf(stderr, "%s: bad image format\n", __FUNCTION__); + free( t ); + return; + } + + /* Compute which mipmap levels we really want to send to the hardware. + */ + + driCalculateTextureFirstLastLevel( (driTextureObject *) t ); + + + /* Figure out the amount of memory required to hold all the mipmap + * levels. Choose the smallest pitch to accomodate the largest + * mipmap: + */ + numLevels = t->base.lastLevel - t->base.firstLevel + 1; + + /* Pitch would be subject to additional rules if texture memory were + * tiled. Currently it isn't. + */ + if (0) { + pitch = 128; + while (pitch < tObj->Image[0][t->base.firstLevel]->Width * t->texelBytes) + pitch *= 2; + } + else { + pitch = tObj->Image[0][t->base.firstLevel]->Width * t->texelBytes; + pitch = (pitch + 3) & ~3; + } + + + /* All images must be loaded at this pitch. Count the number of + * lines required: + */ + for ( total_height = i = 0 ; i < numLevels ; i++ ) { + t->image[0][i].image = tObj->Image[0][t->base.firstLevel + i]; + if (!t->image[0][i].image) + break; + + t->image[0][i].offset = total_height * pitch; + if (t->image[0][i].image->IsCompressed) + { + if (t->image[0][i].image->Height > 4) + total_height += t->image[0][i].image->Height/4; + else + total_height += 1; + } + else + total_height += t->image[0][i].image->Height; + t->image[0][i].internalFormat = baseImage->Format; + } + + t->Pitch = pitch; + t->base.totalSize = total_height*pitch; + t->Setup[I830_TEXREG_TM0S1] = + (((tObj->Image[0][t->base.firstLevel]->Height - 1) << TM0S1_HEIGHT_SHIFT) | + ((tObj->Image[0][t->base.firstLevel]->Width - 1) << TM0S1_WIDTH_SHIFT) | + textureFormat); + t->Setup[I830_TEXREG_TM0S2] = + ((((pitch / 4) - 1) << TM0S2_PITCH_SHIFT)); + t->Setup[I830_TEXREG_TM0S3] &= ~TM0S3_MAX_MIP_MASK; + t->Setup[I830_TEXREG_TM0S3] &= ~TM0S3_MIN_MIP_MASK; + t->Setup[I830_TEXREG_TM0S3] |= ((numLevels - 1)*4) << TM0S3_MIN_MIP_SHIFT; + t->dirty = I830_UPLOAD_TEX0 | I830_UPLOAD_TEX1 + | I830_UPLOAD_TEX2 | I830_UPLOAD_TEX3; + + LOCK_HARDWARE( imesa ); + i830UploadTexImagesLocked( imesa, t ); + UNLOCK_HARDWARE( imesa ); +} + +/* ================================================================ + * Texture combine functions + */ + + +/** + * Calculate the hardware instuctions to setup the current texture enviromnemt + * settings. Since \c gl_texture_unit::_CurrentCombine is used, both + * "classic" texture enviroments and GL_ARB_texture_env_combine type texture + * environments are treated identically. + * + * \todo + * This function should return \c GLboolean. When \c GL_FALSE is returned, + * it means that an environment is selected that the hardware cannot do. This + * is the way the Radeon and R200 drivers work. + * + * \todo + * Looking at i830_3d_regs.h, it seems the i830 can do part of + * GL_ATI_texture_env_combine3. It can handle using \c GL_ONE and + * \c GL_ZERO as combine inputs (which the code already supports). It can + * also handle the \c GL_MODULATE_ADD_ATI mode. Is it worth investigating + * partial support for the extension? + * + * \todo + * Some thought needs to be put into the way combiners work. The driver + * treats the hardware as if there's a specific combine unit tied to each + * texture unit. That's why there's the special case for a disabled texture + * unit. That's not the way the hardware works. In reality, there are 4 + * texture units and four general instruction slots. Each instruction slot + * can use any texture as an input. There's no need for this wierd "no-op" + * stuff. If texture units 0 and 3 are enabled, the instructions to combine + * them should be in slots 0 and 1, not 0 and 3 with two no-ops inbetween. + */ + +static void i830UpdateTexEnv( GLcontext *ctx, GLuint unit ) +{ + i830ContextPtr imesa = I830_CONTEXT(ctx); + const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; + const GLuint numColorArgs = texUnit->_CurrentCombine->_NumArgsRGB; + const GLuint numAlphaArgs = texUnit->_CurrentCombine->_NumArgsA; + + GLboolean need_constant_color = GL_FALSE; + GLuint blendop; + GLuint ablendop; + GLuint args_RGB[3]; + GLuint args_A[3]; + GLuint rgb_shift = texUnit->Combine.ScaleShiftRGB; + GLuint alpha_shift = texUnit->Combine.ScaleShiftA; + int i; + unsigned used; + static const GLuint tex_blend_rgb[3] = { + TEXPIPE_COLOR | TEXBLEND_ARG1 | TEXBLENDARG_MODIFY_PARMS, + TEXPIPE_COLOR | TEXBLEND_ARG2 | TEXBLENDARG_MODIFY_PARMS, + TEXPIPE_COLOR | TEXBLEND_ARG0 | TEXBLENDARG_MODIFY_PARMS, + }; + static const GLuint tex_blend_a[3] = { + TEXPIPE_ALPHA | TEXBLEND_ARG1 | TEXBLENDARG_MODIFY_PARMS, + TEXPIPE_ALPHA | TEXBLEND_ARG2 | TEXBLENDARG_MODIFY_PARMS, + TEXPIPE_ALPHA | TEXBLEND_ARG0 | TEXBLENDARG_MODIFY_PARMS, + }; + static const GLuint op_rgb[4] = { + 0, + TEXBLENDARG_INV_ARG, + TEXBLENDARG_REPLICATE_ALPHA, + TEXBLENDARG_REPLICATE_ALPHA | TEXBLENDARG_INV_ARG, + }; + + + + imesa->TexBlendWordsUsed[unit] = 0; + + if(I830_DEBUG&DEBUG_TEXTURE) + fprintf(stderr, "[%s:%u] env. mode = %s\n", __FUNCTION__, __LINE__, + _mesa_lookup_enum_by_nr(texUnit->EnvMode)); + + + if ( !texUnit->_ReallyEnabled ) { + imesa->TexBlend[unit][0] = (STATE3D_MAP_BLEND_OP_CMD(unit) | + TEXPIPE_COLOR | + ENABLE_TEXOUTPUT_WRT_SEL | + TEXOP_OUTPUT_CURRENT | + DISABLE_TEX_CNTRL_STAGE | + TEXOP_SCALE_1X | + TEXOP_MODIFY_PARMS | + TEXBLENDOP_ARG1); + imesa->TexBlend[unit][1] = (STATE3D_MAP_BLEND_OP_CMD(unit) | + TEXPIPE_ALPHA | + ENABLE_TEXOUTPUT_WRT_SEL | + TEXOP_OUTPUT_CURRENT | + TEXOP_SCALE_1X | + TEXOP_MODIFY_PARMS | + TEXBLENDOP_ARG1); + imesa->TexBlend[unit][2] = (STATE3D_MAP_BLEND_ARG_CMD(unit) | + TEXPIPE_COLOR | + TEXBLEND_ARG1 | + TEXBLENDARG_MODIFY_PARMS | + TEXBLENDARG_CURRENT); + imesa->TexBlend[unit][3] = (STATE3D_MAP_BLEND_ARG_CMD(unit) | + TEXPIPE_ALPHA | + TEXBLEND_ARG1 | + TEXBLENDARG_MODIFY_PARMS | + TEXBLENDARG_CURRENT); + imesa->TexBlendWordsUsed[unit] = 4; + } + else { + switch(texUnit->_CurrentCombine->ModeRGB) { + case GL_REPLACE: + blendop = TEXBLENDOP_ARG1; + break; + case GL_MODULATE: + blendop = TEXBLENDOP_MODULATE; + break; + case GL_ADD: + blendop = TEXBLENDOP_ADD; + break; + case GL_ADD_SIGNED: + blendop = TEXBLENDOP_ADDSIGNED; + break; + case GL_INTERPOLATE: + blendop = TEXBLENDOP_BLEND; + break; + case GL_SUBTRACT: + blendop = TEXBLENDOP_SUBTRACT; + break; + case GL_DOT3_RGB_EXT: + case GL_DOT3_RGBA_EXT: + /* The EXT version of the DOT3 extension does not support the + * scale factor, but the ARB version (and the version in OpenGL + * 1.3) does. + */ + rgb_shift = 0; + alpha_shift = 0; + /* FALLTHROUGH */ + + case GL_DOT3_RGB: + case GL_DOT3_RGBA: + blendop = TEXBLENDOP_DOT3; + break; + default: + return; + } + + blendop |= (rgb_shift << TEXOP_SCALE_SHIFT); + + switch(texUnit->_CurrentCombine->ModeA) { + case GL_REPLACE: + ablendop = TEXBLENDOP_ARG1; + break; + case GL_MODULATE: + ablendop = TEXBLENDOP_MODULATE; + break; + case GL_ADD: + ablendop = TEXBLENDOP_ADD; + break; + case GL_ADD_SIGNED: + ablendop = TEXBLENDOP_ADDSIGNED; + break; + case GL_INTERPOLATE: + ablendop = TEXBLENDOP_BLEND; + break; + case GL_SUBTRACT: + ablendop = TEXBLENDOP_SUBTRACT; + break; + default: + return; + } + + if ( (texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA_EXT) + || (texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA) ) { + ablendop = TEXBLENDOP_DOT3; + } + + ablendop |= (alpha_shift << TEXOP_SCALE_SHIFT); + + /* Handle RGB args */ + for( i = 0 ; i < numColorArgs ; i++ ) { + const int op = texUnit->_CurrentCombine->OperandRGB[i] - GL_SRC_COLOR; + + assert( (op >= 0) && (op <= 3) ); + switch(texUnit->_CurrentCombine->SourceRGB[i]) { + case GL_TEXTURE: + args_RGB[i] = TEXBLENDARG_TEXEL0 + unit; + break; + case GL_TEXTURE0: + case GL_TEXTURE1: + case GL_TEXTURE2: + case GL_TEXTURE3: + args_RGB[i] = TEXBLENDARG_TEXEL0 + + (texUnit->_CurrentCombine->SourceRGB[i] & 0x03); + break; + case GL_CONSTANT: + args_RGB[i] = TEXBLENDARG_FACTOR_N; + need_constant_color = GL_TRUE; + break; + case GL_PRIMARY_COLOR: + args_RGB[i] = TEXBLENDARG_DIFFUSE; + break; + case GL_PREVIOUS: + args_RGB[i] = TEXBLENDARG_CURRENT; + break; + case GL_ONE: + args_RGB[i] = TEXBLENDARG_ONE; + break; + case GL_ZERO: + args_RGB[i] = TEXBLENDARG_ONE | TEXBLENDARG_INV_ARG; + break; + default: + return; + } + + /* Xor is used so that GL_ONE_MINUS_SRC_COLOR with GL_ZERO + * works correctly. + */ + args_RGB[i] ^= op_rgb[op]; + } + + /* Handle A args */ + for( i = 0 ; i < numAlphaArgs ; i++ ) { + const int op = texUnit->_CurrentCombine->OperandA[i] - GL_SRC_ALPHA; + + assert( (op >= 0) && (op <= 1) ); + switch(texUnit->_CurrentCombine->SourceA[i]) { + case GL_TEXTURE: + args_A[i] = TEXBLENDARG_TEXEL0 + unit; + break; + case GL_TEXTURE0: + case GL_TEXTURE1: + case GL_TEXTURE2: + case GL_TEXTURE3: + args_A[i] = TEXBLENDARG_TEXEL0 + + (texUnit->_CurrentCombine->SourceA[i] & 0x03); + break; + case GL_CONSTANT: + args_A[i] = TEXBLENDARG_FACTOR_N; + need_constant_color = GL_TRUE; + break; + case GL_PRIMARY_COLOR: + args_A[i] = TEXBLENDARG_DIFFUSE; + break; + case GL_PREVIOUS: + args_A[i] = TEXBLENDARG_CURRENT; + break; + case GL_ONE: + args_A[i] = TEXBLENDARG_ONE; + break; + case GL_ZERO: + args_A[i] = TEXBLENDARG_ONE | TEXBLENDARG_INV_ARG; + break; + default: + return; + } + + /* We cheat. :) The register values for this are the same as for + * RGB. Xor is used so that GL_ONE_MINUS_SRC_ALPHA with GL_ZERO + * works correctly. + */ + args_A[i] ^= op_rgb[op]; + } + + /* Native Arg1 == Arg0 in GL_EXT_texture_env_combine spec */ + /* Native Arg2 == Arg1 in GL_EXT_texture_env_combine spec */ + /* Native Arg0 == Arg2 in GL_EXT_texture_env_combine spec */ + + /* Build color pipeline */ + + used = 0; + imesa->TexBlend[unit][used++] = (STATE3D_MAP_BLEND_OP_CMD(unit) | + TEXPIPE_COLOR | + ENABLE_TEXOUTPUT_WRT_SEL | + TEXOP_OUTPUT_CURRENT | + DISABLE_TEX_CNTRL_STAGE | + TEXOP_MODIFY_PARMS | + blendop); + + imesa->TexBlend[unit][used++] = (STATE3D_MAP_BLEND_OP_CMD(unit) | + TEXPIPE_ALPHA | + ENABLE_TEXOUTPUT_WRT_SEL | + TEXOP_OUTPUT_CURRENT | + TEXOP_MODIFY_PARMS | + ablendop); + + for ( i = 0 ; i < numColorArgs ; i++ ) { + imesa->TexBlend[unit][used++] = (STATE3D_MAP_BLEND_ARG_CMD(unit) | + tex_blend_rgb[i] | + args_RGB[i]); + } + + for ( i = 0 ; i < numAlphaArgs ; i++ ) { + imesa->TexBlend[unit][used++] = (STATE3D_MAP_BLEND_ARG_CMD(unit) | + tex_blend_a[i] | + args_A[i]); + } + + + if ( need_constant_color ) { + GLubyte r, g, b, a; + const GLfloat * const fc = texUnit->EnvColor; + + FLOAT_COLOR_TO_UBYTE_COLOR(r, fc[RCOMP]); + FLOAT_COLOR_TO_UBYTE_COLOR(g, fc[GCOMP]); + FLOAT_COLOR_TO_UBYTE_COLOR(b, fc[BCOMP]); + FLOAT_COLOR_TO_UBYTE_COLOR(a, fc[ACOMP]); + + imesa->TexBlend[unit][used++] = STATE3D_COLOR_FACTOR_CMD(unit); + imesa->TexBlend[unit][used++] = ((a << 24) | (r << 16) | (g << 8) | b); + } + + imesa->TexBlendWordsUsed[unit] = used; + } + + I830_STATECHANGE( imesa, I830_UPLOAD_TEXBLEND_N(unit) ); +} + + +/* This is bogus -- can't load the same texture object on two units. + */ +static void i830TexSetUnit( i830TextureObjectPtr t, GLuint unit ) +{ + if(I830_DEBUG&DEBUG_TEXTURE) + fprintf(stderr, "%s unit(%d)\n", __FUNCTION__, unit); + + t->Setup[I830_TEXREG_TM0LI] = (STATE3D_LOAD_STATE_IMMEDIATE_2 | + (LOAD_TEXTURE_MAP0 << unit) | 4); + + I830_SET_FIELD(t->Setup[I830_TEXREG_MCS], MAP_UNIT_MASK, MAP_UNIT(unit)); + + t->current_unit = unit; + t->base.bound |= (1U << unit); +} + +#define TEXCOORDTYPE_MASK (~((1<<13)|(1<<12)|(1<<11))) + + +static GLboolean enable_tex_common( GLcontext *ctx, GLuint unit ) +{ + i830ContextPtr imesa = I830_CONTEXT(ctx); + struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; + struct gl_texture_object *tObj = texUnit->_Current; + i830TextureObjectPtr t = (i830TextureObjectPtr)tObj->DriverData; + + /* Fallback if there's a texture border */ + if ( tObj->Image[0][tObj->BaseLevel]->Border > 0 ) { + return GL_FALSE; + } + + /* Upload teximages (not pipelined) + */ + if (t->base.dirty_images[0]) { + i830SetTexImages( imesa, tObj ); + if (!t->base.memBlock) { + return GL_FALSE; + } + } + + /* Update state if this is a different texture object to last + * time. + */ + if (imesa->CurrentTexObj[unit] != t) { + + if ( imesa->CurrentTexObj[unit] != NULL ) { + /* The old texture is no longer bound to this texture unit. + * Mark it as such. + */ + + imesa->CurrentTexObj[unit]->base.bound &= ~(1U << unit); + } + + I830_STATECHANGE( imesa, I830_UPLOAD_TEX_N(unit) ); + imesa->CurrentTexObj[unit] = t; + i830TexSetUnit(t, unit); + } + + /* Update texture environment if texture object image format or + * texture environment state has changed. + * + * KW: doesn't work -- change from tex0 only to tex0+tex1 gets + * missed (need to update last stage flag?). Call + * i830UpdateTexEnv always. + */ + if (tObj->Image[0][tObj->BaseLevel]->Format != + imesa->TexEnvImageFmt[unit]) { + imesa->TexEnvImageFmt[unit] = tObj->Image[0][tObj->BaseLevel]->Format; + } + i830UpdateTexEnv( ctx, unit ); + imesa->TexEnabledMask |= I830_TEX_UNIT_ENABLED(unit); + + return GL_TRUE; +} + +static GLboolean enable_tex_rect( GLcontext *ctx, GLuint unit ) +{ + i830ContextPtr imesa = I830_CONTEXT(ctx); + struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; + struct gl_texture_object *tObj = texUnit->_Current; + i830TextureObjectPtr t = (i830TextureObjectPtr)tObj->DriverData; + GLuint mcs = t->Setup[I830_TEXREG_MCS]; + + mcs &= ~TEXCOORDS_ARE_NORMAL; + mcs |= TEXCOORDS_ARE_IN_TEXELUNITS; + + if (mcs != t->Setup[I830_TEXREG_MCS]) { + I830_STATECHANGE( imesa, I830_UPLOAD_TEX_N(unit) ); + t->Setup[I830_TEXREG_MCS] = mcs; + } + + return GL_TRUE; +} + + +static GLboolean enable_tex_2d( GLcontext *ctx, GLuint unit ) +{ + i830ContextPtr imesa = I830_CONTEXT(ctx); + struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; + struct gl_texture_object *tObj = texUnit->_Current; + i830TextureObjectPtr t = (i830TextureObjectPtr)tObj->DriverData; + GLuint mcs = t->Setup[I830_TEXREG_MCS]; + + mcs &= ~TEXCOORDS_ARE_IN_TEXELUNITS; + mcs |= TEXCOORDS_ARE_NORMAL; + + if (mcs != t->Setup[I830_TEXREG_MCS]) { + I830_STATECHANGE( imesa, I830_UPLOAD_TEX_N(unit) ); + t->Setup[I830_TEXREG_MCS] = mcs; + } + + return GL_TRUE; +} + + +static GLboolean disable_tex( GLcontext *ctx, int unit ) +{ + i830ContextPtr imesa = I830_CONTEXT(ctx); + + /* This is happening too often. I need to conditionally send diffuse + * state to the card. Perhaps a diffuse dirty flag of some kind. + * Will need to change this logic if more than 2 texture units are + * used. We need to only do this up to the last unit enabled, or unit + * one if nothing is enabled. + */ + + if ( imesa->CurrentTexObj[unit] != NULL ) { + /* The old texture is no longer bound to this texture unit. + * Mark it as such. + */ + + imesa->CurrentTexObj[unit]->base.bound &= ~(1U << unit); + imesa->CurrentTexObj[unit] = NULL; + } + + imesa->TexEnvImageFmt[unit] = 0; + imesa->dirty &= ~(I830_UPLOAD_TEX_N(unit)); + + i830UpdateTexEnv( ctx, unit ); + + return GL_TRUE; +} + +static GLboolean i830UpdateTexUnit( GLcontext *ctx, GLuint unit ) +{ + i830ContextPtr imesa = I830_CONTEXT(ctx); + struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; + + imesa->TexEnabledMask &= ~(I830_TEX_UNIT_ENABLED(unit)); + + if (texUnit->_ReallyEnabled == TEXTURE_2D_BIT) { + return (enable_tex_common( ctx, unit ) && + enable_tex_2d( ctx, unit )); + } + else if (texUnit->_ReallyEnabled == TEXTURE_RECT_BIT) { + return (enable_tex_common( ctx, unit ) && + enable_tex_rect( ctx, unit )); + } + else if (texUnit->_ReallyEnabled) { + return GL_FALSE; + } + else { + return disable_tex( ctx, unit ); + } +} + + + +void i830UpdateTextureState( GLcontext *ctx ) +{ + i830ContextPtr imesa = I830_CONTEXT(ctx); + int i; + int last_stage = 0; + GLboolean ok; + + for ( i = 0 ; i < ctx->Const.MaxTextureUnits ; i++ ) { + if ( (ctx->Texture.Unit[i]._ReallyEnabled == TEXTURE_2D_BIT) + || (ctx->Texture.Unit[i]._ReallyEnabled == TEXTURE_RECT_BIT) ) { + last_stage = i; + } + } + + ok = GL_TRUE; + for ( i = 0 ; i <= last_stage ; i++ ) { + ok = ok && i830UpdateTexUnit( ctx, i ); + } + + FALLBACK( imesa, I830_FALLBACK_TEXTURE, !ok ); + + + /* Make sure last stage is set correctly */ + imesa->TexBlend[last_stage][0] |= TEXOP_LAST_STAGE; +} |