diff options
Diffstat (limited to 'mesalib/src/mesa/main/state.c')
| -rw-r--r-- | mesalib/src/mesa/main/state.c | 718 |
1 files changed, 718 insertions, 0 deletions
diff --git a/mesalib/src/mesa/main/state.c b/mesalib/src/mesa/main/state.c new file mode 100644 index 000000000..140a998df --- /dev/null +++ b/mesalib/src/mesa/main/state.c @@ -0,0 +1,718 @@ +/* + * Mesa 3-D graphics library + * Version: 7.3 + * + * Copyright (C) 1999-2008 Brian Paul 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, sublicense, + * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL 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. + */ + + +/** + * \file state.c + * State management. + * + * This file manages recalculation of derived values in GLcontext. + */ + + +#include "glheader.h" +#include "mtypes.h" +#include "context.h" +#include "debug.h" +#include "macros.h" +#include "ffvertex_prog.h" +#include "framebuffer.h" +#include "light.h" +#include "matrix.h" +#if FEATURE_pixel_transfer +#include "pixel.h" +#endif +#include "shader/program.h" +#include "shader/prog_parameter.h" +#include "state.h" +#include "stencil.h" +#include "texenvprogram.h" +#include "texobj.h" +#include "texstate.h" +#include "viewport.h" + + +static void +update_separate_specular(GLcontext *ctx) +{ + if (NEED_SECONDARY_COLOR(ctx)) + ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR; + else + ctx->_TriangleCaps &= ~DD_SEPARATE_SPECULAR; +} + + +/** + * Compute the index of the last array element that can be safely accessed + * in a vertex array. We can really only do this when the array lives in + * a VBO. + * The array->_MaxElement field will be updated. + * Later in glDrawArrays/Elements/etc we can do some bounds checking. + */ +static void +compute_max_element(struct gl_client_array *array) +{ + assert(array->Enabled); + if (array->BufferObj->Name) { + GLsizeiptrARB offset = (GLsizeiptrARB) array->Ptr; + GLsizeiptrARB obj_size = (GLsizeiptrARB) array->BufferObj->Size; + + if (offset < obj_size) { + array->_MaxElement = (obj_size - offset + + array->StrideB - + array->_ElementSize) / array->StrideB; + } else { + array->_MaxElement = 0; + } + /* Compute the max element we can access in the VBO without going + * out of bounds. + */ + array->_MaxElement = ((GLsizeiptrARB) array->BufferObj->Size + - (GLsizeiptrARB) array->Ptr + array->StrideB + - array->_ElementSize) / array->StrideB; + } + else { + /* user-space array, no idea how big it is */ + array->_MaxElement = 2 * 1000 * 1000 * 1000; /* just a big number */ + } +} + + +/** + * Helper for update_arrays(). + * \return min(current min, array->_MaxElement). + */ +static GLuint +update_min(GLuint min, struct gl_client_array *array) +{ + compute_max_element(array); + return MIN2(min, array->_MaxElement); +} + + +/** + * Update ctx->Array._MaxElement (the max legal index into all enabled arrays). + * Need to do this upon new array state or new buffer object state. + */ +static void +update_arrays( GLcontext *ctx ) +{ + struct gl_array_object *arrayObj = ctx->Array.ArrayObj; + GLuint i, min = ~0; + + /* find min of _MaxElement values for all enabled arrays */ + + /* 0 */ + if (ctx->VertexProgram._Current + && arrayObj->VertexAttrib[VERT_ATTRIB_POS].Enabled) { + min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_POS]); + } + else if (arrayObj->Vertex.Enabled) { + min = update_min(min, &arrayObj->Vertex); + } + + /* 1 */ + if (ctx->VertexProgram._Enabled + && arrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT].Enabled) { + min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT]); + } + /* no conventional vertex weight array */ + + /* 2 */ + if (ctx->VertexProgram._Enabled + && arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Enabled) { + min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL]); + } + else if (arrayObj->Normal.Enabled) { + min = update_min(min, &arrayObj->Normal); + } + + /* 3 */ + if (ctx->VertexProgram._Enabled + && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Enabled) { + min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0]); + } + else if (arrayObj->Color.Enabled) { + min = update_min(min, &arrayObj->Color); + } + + /* 4 */ + if (ctx->VertexProgram._Enabled + && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Enabled) { + min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1]); + } + else if (arrayObj->SecondaryColor.Enabled) { + min = update_min(min, &arrayObj->SecondaryColor); + } + + /* 5 */ + if (ctx->VertexProgram._Enabled + && arrayObj->VertexAttrib[VERT_ATTRIB_FOG].Enabled) { + min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_FOG]); + } + else if (arrayObj->FogCoord.Enabled) { + min = update_min(min, &arrayObj->FogCoord); + } + + /* 6 */ + if (ctx->VertexProgram._Enabled + && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled) { + min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX]); + } + else if (arrayObj->Index.Enabled) { + min = update_min(min, &arrayObj->Index); + } + + /* 7 */ + if (ctx->VertexProgram._Enabled + && arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled) { + min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG]); + } + + /* 8..15 */ + for (i = VERT_ATTRIB_TEX0; i <= VERT_ATTRIB_TEX7; i++) { + if (ctx->VertexProgram._Enabled + && arrayObj->VertexAttrib[i].Enabled) { + min = update_min(min, &arrayObj->VertexAttrib[i]); + } + else if (i - VERT_ATTRIB_TEX0 < ctx->Const.MaxTextureCoordUnits + && arrayObj->TexCoord[i - VERT_ATTRIB_TEX0].Enabled) { + min = update_min(min, &arrayObj->TexCoord[i - VERT_ATTRIB_TEX0]); + } + } + + /* 16..31 */ + if (ctx->VertexProgram._Current) { + for (i = 0; i < Elements(arrayObj->VertexAttrib); i++) { + if (arrayObj->VertexAttrib[i].Enabled) { + min = update_min(min, &arrayObj->VertexAttrib[i]); + } + } + } + + if (arrayObj->EdgeFlag.Enabled) { + min = update_min(min, &arrayObj->EdgeFlag); + } + + /* _MaxElement is one past the last legal array element */ + arrayObj->_MaxElement = min; +} + + +/** + * Update the following fields: + * ctx->VertexProgram._Enabled + * ctx->FragmentProgram._Enabled + * ctx->ATIFragmentShader._Enabled + * This needs to be done before texture state validation. + */ +static void +update_program_enables(GLcontext *ctx) +{ + /* These _Enabled flags indicate if the program is enabled AND valid. */ + ctx->VertexProgram._Enabled = ctx->VertexProgram.Enabled + && ctx->VertexProgram.Current->Base.Instructions; + ctx->FragmentProgram._Enabled = ctx->FragmentProgram.Enabled + && ctx->FragmentProgram.Current->Base.Instructions; + ctx->ATIFragmentShader._Enabled = ctx->ATIFragmentShader.Enabled + && ctx->ATIFragmentShader.Current->Instructions[0]; +} + + +/** + * Update vertex/fragment program state. In particular, update these fields: + * ctx->VertexProgram._Current + * ctx->VertexProgram._TnlProgram, + * These point to the highest priority enabled vertex/fragment program or are + * NULL if fixed-function processing is to be done. + * + * This function needs to be called after texture state validation in case + * we're generating a fragment program from fixed-function texture state. + * + * \return bitfield which will indicate _NEW_PROGRAM state if a new vertex + * or fragment program is being used. + */ +static GLbitfield +update_program(GLcontext *ctx) +{ + const struct gl_shader_program *shProg = ctx->Shader.CurrentProgram; + const struct gl_vertex_program *prevVP = ctx->VertexProgram._Current; + const struct gl_fragment_program *prevFP = ctx->FragmentProgram._Current; + GLbitfield new_state = 0x0; + + /* + * Set the ctx->VertexProgram._Current and ctx->FragmentProgram._Current + * pointers to the programs that should be used for rendering. If either + * is NULL, use fixed-function code paths. + * + * These programs may come from several sources. The priority is as + * follows: + * 1. OpenGL 2.0/ARB vertex/fragment shaders + * 2. ARB/NV vertex/fragment programs + * 3. Programs derived from fixed-function state. + * + * Note: it's possible for a vertex shader to get used with a fragment + * program (and vice versa) here, but in practice that shouldn't ever + * come up, or matter. + */ + + if (shProg && shProg->LinkStatus && shProg->FragmentProgram) { + /* Use shader programs */ + _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, + shProg->FragmentProgram); + } + else if (ctx->FragmentProgram._Enabled) { + /* use user-defined vertex program */ + _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, + ctx->FragmentProgram.Current); + } + else if (ctx->FragmentProgram._MaintainTexEnvProgram) { + /* Use fragment program generated from fixed-function state. + */ + _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, + _mesa_get_fixed_func_fragment_program(ctx)); + _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._TexEnvProgram, + ctx->FragmentProgram._Current); + } + else { + /* no fragment program */ + _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, NULL); + } + + /* Examine vertex program after fragment program as + * _mesa_get_fixed_func_vertex_program() needs to know active + * fragprog inputs. + */ + if (shProg && shProg->LinkStatus && shProg->VertexProgram) { + /* Use shader programs */ + _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, + shProg->VertexProgram); + } + else if (ctx->VertexProgram._Enabled) { + /* use user-defined vertex program */ + _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, + ctx->VertexProgram.Current); + } + else if (ctx->VertexProgram._MaintainTnlProgram) { + /* Use vertex program generated from fixed-function state. + */ + _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, + _mesa_get_fixed_func_vertex_program(ctx)); + _mesa_reference_vertprog(ctx, &ctx->VertexProgram._TnlProgram, + ctx->VertexProgram._Current); + } + else { + /* no vertex program */ + _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, NULL); + } + + /* Let the driver know what's happening: + */ + if (ctx->FragmentProgram._Current != prevFP) { + new_state |= _NEW_PROGRAM; + if (ctx->Driver.BindProgram) { + ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, + (struct gl_program *) ctx->FragmentProgram._Current); + } + } + + if (ctx->VertexProgram._Current != prevVP) { + new_state |= _NEW_PROGRAM; + if (ctx->Driver.BindProgram) { + ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB, + (struct gl_program *) ctx->VertexProgram._Current); + } + } + + return new_state; +} + + +/** + * Examine shader constants and return either _NEW_PROGRAM_CONSTANTS or 0. + */ +static GLbitfield +update_program_constants(GLcontext *ctx) +{ + GLbitfield new_state = 0x0; + + if (ctx->FragmentProgram._Current) { + const struct gl_program_parameter_list *params = + ctx->FragmentProgram._Current->Base.Parameters; + if (params && params->StateFlags & ctx->NewState) { + new_state |= _NEW_PROGRAM_CONSTANTS; + } + } + + if (ctx->VertexProgram._Current) { + const struct gl_program_parameter_list *params = + ctx->VertexProgram._Current->Base.Parameters; + if (params && params->StateFlags & ctx->NewState) { + new_state |= _NEW_PROGRAM_CONSTANTS; + } + } + + return new_state; +} + + + + +static void +update_viewport_matrix(GLcontext *ctx) +{ + const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF; + + ASSERT(depthMax > 0); + + /* Compute scale and bias values. This is really driver-specific + * and should be maintained elsewhere if at all. + * NOTE: RasterPos uses this. + */ + _math_matrix_viewport(&ctx->Viewport._WindowMap, + ctx->Viewport.X, ctx->Viewport.Y, + ctx->Viewport.Width, ctx->Viewport.Height, + ctx->Viewport.Near, ctx->Viewport.Far, + depthMax); +} + + +/** + * Update derived multisample state. + */ +static void +update_multisample(GLcontext *ctx) +{ + ctx->Multisample._Enabled = GL_FALSE; + if (ctx->Multisample.Enabled && + ctx->DrawBuffer && + ctx->DrawBuffer->Visual.sampleBuffers) + ctx->Multisample._Enabled = GL_TRUE; +} + + +/** + * Update derived color/blend/logicop state. + */ +static void +update_color(GLcontext *ctx) +{ + /* This is needed to support 1.1's RGB logic ops AND + * 1.0's blending logicops. + */ + ctx->Color._LogicOpEnabled = RGBA_LOGICOP_ENABLED(ctx); +} + + +/* + * Check polygon state and set DD_TRI_CULL_FRONT_BACK and/or DD_TRI_OFFSET + * in ctx->_TriangleCaps if needed. + */ +static void +update_polygon(GLcontext *ctx) +{ + ctx->_TriangleCaps &= ~(DD_TRI_CULL_FRONT_BACK | DD_TRI_OFFSET); + + if (ctx->Polygon.CullFlag && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) + ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK; + + if ( ctx->Polygon.OffsetPoint + || ctx->Polygon.OffsetLine + || ctx->Polygon.OffsetFill) + ctx->_TriangleCaps |= DD_TRI_OFFSET; +} + + +/** + * Update the ctx->_TriangleCaps bitfield. + * XXX that bitfield should really go away someday! + * This function must be called after other update_*() functions since + * there are dependencies on some other derived values. + */ +#if 0 +static void +update_tricaps(GLcontext *ctx, GLbitfield new_state) +{ + ctx->_TriangleCaps = 0; + + /* + * Points + */ + if (1/*new_state & _NEW_POINT*/) { + if (ctx->Point.SmoothFlag) + ctx->_TriangleCaps |= DD_POINT_SMOOTH; + if (ctx->Point.Size != 1.0F) + ctx->_TriangleCaps |= DD_POINT_SIZE; + if (ctx->Point._Attenuated) + ctx->_TriangleCaps |= DD_POINT_ATTEN; + } + + /* + * Lines + */ + if (1/*new_state & _NEW_LINE*/) { + if (ctx->Line.SmoothFlag) + ctx->_TriangleCaps |= DD_LINE_SMOOTH; + if (ctx->Line.StippleFlag) + ctx->_TriangleCaps |= DD_LINE_STIPPLE; + if (ctx->Line.Width != 1.0) + ctx->_TriangleCaps |= DD_LINE_WIDTH; + } + + /* + * Polygons + */ + if (1/*new_state & _NEW_POLYGON*/) { + if (ctx->Polygon.SmoothFlag) + ctx->_TriangleCaps |= DD_TRI_SMOOTH; + if (ctx->Polygon.StippleFlag) + ctx->_TriangleCaps |= DD_TRI_STIPPLE; + if (ctx->Polygon.FrontMode != GL_FILL + || ctx->Polygon.BackMode != GL_FILL) + ctx->_TriangleCaps |= DD_TRI_UNFILLED; + if (ctx->Polygon.CullFlag + && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) + ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK; + if (ctx->Polygon.OffsetPoint || + ctx->Polygon.OffsetLine || + ctx->Polygon.OffsetFill) + ctx->_TriangleCaps |= DD_TRI_OFFSET; + } + + /* + * Lighting and shading + */ + if (ctx->Light.Enabled && ctx->Light.Model.TwoSide) + ctx->_TriangleCaps |= DD_TRI_LIGHT_TWOSIDE; + if (ctx->Light.ShadeModel == GL_FLAT) + ctx->_TriangleCaps |= DD_FLATSHADE; + if (NEED_SECONDARY_COLOR(ctx)) + ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR; + + /* + * Stencil + */ + if (ctx->Stencil._TestTwoSide) + ctx->_TriangleCaps |= DD_TRI_TWOSTENCIL; +} +#endif + + +/** + * Compute derived GL state. + * If __GLcontextRec::NewState is non-zero then this function \b must + * be called before rendering anything. + * + * Calls dd_function_table::UpdateState to perform any internal state + * management necessary. + * + * \sa _mesa_update_modelview_project(), _mesa_update_texture(), + * _mesa_update_buffer_bounds(), + * _mesa_update_lighting() and _mesa_update_tnl_spaces(). + */ +void +_mesa_update_state_locked( GLcontext *ctx ) +{ + GLbitfield new_state = ctx->NewState; + GLbitfield prog_flags = _NEW_PROGRAM; + GLbitfield new_prog_state = 0x0; + + if (new_state == _NEW_CURRENT_ATTRIB) + goto out; + + if (MESA_VERBOSE & VERBOSE_STATE) + _mesa_print_state("_mesa_update_state", new_state); + + /* Determine which state flags effect vertex/fragment program state */ + if (ctx->FragmentProgram._MaintainTexEnvProgram) { + prog_flags |= (_NEW_TEXTURE | _NEW_FOG | + _NEW_ARRAY | _NEW_LIGHT | _NEW_POINT | _NEW_RENDERMODE | + _NEW_PROGRAM); + } + if (ctx->VertexProgram._MaintainTnlProgram) { + prog_flags |= (_NEW_ARRAY | _NEW_TEXTURE | _NEW_TEXTURE_MATRIX | + _NEW_TRANSFORM | _NEW_POINT | + _NEW_FOG | _NEW_LIGHT | + _MESA_NEW_NEED_EYE_COORDS); + } + + /* + * Now update derived state info + */ + + if (new_state & prog_flags) + update_program_enables( ctx ); + + if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION)) + _mesa_update_modelview_project( ctx, new_state ); + + if (new_state & (_NEW_PROGRAM|_NEW_TEXTURE|_NEW_TEXTURE_MATRIX)) + _mesa_update_texture( ctx, new_state ); + + if (new_state & _NEW_BUFFERS) + _mesa_update_framebuffer(ctx); + + if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT)) + _mesa_update_draw_buffer_bounds( ctx ); + + if (new_state & _NEW_POLYGON) + update_polygon( ctx ); + + if (new_state & _NEW_LIGHT) + _mesa_update_lighting( ctx ); + + if (new_state & (_NEW_STENCIL | _NEW_BUFFERS)) + _mesa_update_stencil( ctx ); + +#if FEATURE_pixel_transfer + if (new_state & _MESA_NEW_TRANSFER_STATE) + _mesa_update_pixel( ctx, new_state ); +#endif + + if (new_state & _DD_NEW_SEPARATE_SPECULAR) + update_separate_specular( ctx ); + + if (new_state & (_NEW_ARRAY | _NEW_PROGRAM | _NEW_BUFFER_OBJECT)) + update_arrays( ctx ); + + if (new_state & (_NEW_BUFFERS | _NEW_VIEWPORT)) + update_viewport_matrix(ctx); + + if (new_state & _NEW_MULTISAMPLE) + update_multisample( ctx ); + + if (new_state & _NEW_COLOR) + update_color( ctx ); + +#if 0 + if (new_state & (_NEW_POINT | _NEW_LINE | _NEW_POLYGON | _NEW_LIGHT + | _NEW_STENCIL | _DD_NEW_SEPARATE_SPECULAR)) + update_tricaps( ctx, new_state ); +#endif + + /* ctx->_NeedEyeCoords is now up to date. + * + * If the truth value of this variable has changed, update for the + * new lighting space and recompute the positions of lights and the + * normal transform. + * + * If the lighting space hasn't changed, may still need to recompute + * light positions & normal transforms for other reasons. + */ + if (new_state & _MESA_NEW_NEED_EYE_COORDS) + _mesa_update_tnl_spaces( ctx, new_state ); + + if (new_state & prog_flags) { + /* When we generate programs from fixed-function vertex/fragment state + * this call may generate/bind a new program. If so, we need to + * propogate the _NEW_PROGRAM flag to the driver. + */ + new_prog_state |= update_program( ctx ); + } + + + out: + new_prog_state |= update_program_constants(ctx); + + /* + * Give the driver a chance to act upon the new_state flags. + * The driver might plug in different span functions, for example. + * Also, this is where the driver can invalidate the state of any + * active modules (such as swrast_setup, swrast, tnl, etc). + * + * Set ctx->NewState to zero to avoid recursion if + * Driver.UpdateState() has to call FLUSH_VERTICES(). (fixed?) + */ + new_state = ctx->NewState | new_prog_state; + ctx->NewState = 0; + ctx->Driver.UpdateState(ctx, new_state); + ctx->Array.NewState = 0; +} + + +/* This is the usual entrypoint for state updates: + */ +void +_mesa_update_state( GLcontext *ctx ) +{ + _mesa_lock_context_textures(ctx); + _mesa_update_state_locked(ctx); + _mesa_unlock_context_textures(ctx); +} + + + + +/** + * Want to figure out which fragment program inputs are actually + * constant/current values from ctx->Current. These should be + * referenced as a tracked state variable rather than a fragment + * program input, to save the overhead of putting a constant value in + * every submitted vertex, transferring it to hardware, interpolating + * it across the triangle, etc... + * + * When there is a VP bound, just use vp->outputs. But when we're + * generating vp from fixed function state, basically want to + * calculate: + * + * vp_out_2_fp_in( vp_in_2_vp_out( varying_inputs ) | + * potential_vp_outputs ) + * + * Where potential_vp_outputs is calculated by looking at enabled + * texgen, etc. + * + * The generated fragment program should then only declare inputs that + * may vary or otherwise differ from the ctx->Current values. + * Otherwise, the fp should track them as state values instead. + */ +void +_mesa_set_varying_vp_inputs( GLcontext *ctx, + GLbitfield varying_inputs ) +{ + if (ctx->varying_vp_inputs != varying_inputs) { + ctx->varying_vp_inputs = varying_inputs; + ctx->NewState |= _NEW_ARRAY; + /*_mesa_printf("%s %x\n", __FUNCTION__, varying_inputs);*/ + } +} + + +/** + * Used by drivers to tell core Mesa that the driver is going to + * install/ use its own vertex program. In particular, this will + * prevent generated fragment programs from using state vars instead + * of ordinary varyings/inputs. + */ +void +_mesa_set_vp_override(GLcontext *ctx, GLboolean flag) +{ + if (ctx->VertexProgram._Overriden != flag) { + ctx->VertexProgram._Overriden = flag; + + /* Set one of the bits which will trigger fragment program + * regeneration: + */ + ctx->NewState |= _NEW_PROGRAM; + } +} |