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-rw-r--r--mesalib/src/mesa/main/state.c1477
1 files changed, 743 insertions, 734 deletions
diff --git a/mesalib/src/mesa/main/state.c b/mesalib/src/mesa/main/state.c
index 502c42929..5651e3263 100644
--- a/mesalib/src/mesa/main/state.c
+++ b/mesalib/src/mesa/main/state.c
@@ -1,734 +1,743 @@
-/*
- * 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 struct gl_context.
- */
-
-
-#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"
-#include "pixel.h"
-#include "program/program.h"
-#include "program/prog_parameter.h"
-#include "state.h"
-#include "stencil.h"
-#include "texenvprogram.h"
-#include "texobj.h"
-#include "texstate.h"
-
-
-static void
-update_separate_specular(struct gl_context *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;
- }
- }
- 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( struct gl_context *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(struct gl_context *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(struct gl_context *ctx)
-{
- const struct gl_shader_program *vsProg = ctx->Shader.CurrentVertexProgram;
- const struct gl_shader_program *gsProg = ctx->Shader.CurrentGeometryProgram;
- const struct gl_shader_program *fsProg = ctx->Shader.CurrentFragmentProgram;
- const struct gl_vertex_program *prevVP = ctx->VertexProgram._Current;
- const struct gl_fragment_program *prevFP = ctx->FragmentProgram._Current;
- const struct gl_geometry_program *prevGP = ctx->GeometryProgram._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 (fsProg && fsProg->LinkStatus && fsProg->FragmentProgram) {
- /* Use shader programs */
- _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
- fsProg->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);
- }
-
- if (gsProg && gsProg->LinkStatus && gsProg->GeometryProgram) {
- /* Use shader programs */
- _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current,
- gsProg->GeometryProgram);
- } else {
- /* no fragment program */
- _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current, NULL);
- }
-
- /* Examine vertex program after fragment program as
- * _mesa_get_fixed_func_vertex_program() needs to know active
- * fragprog inputs.
- */
- if (vsProg && vsProg->LinkStatus && vsProg->VertexProgram) {
- /* Use shader programs */
- _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
- vsProg->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->GeometryProgram._Current != prevGP) {
- new_state |= _NEW_PROGRAM;
- if (ctx->Driver.BindProgram) {
- ctx->Driver.BindProgram(ctx, MESA_GEOMETRY_PROGRAM,
- (struct gl_program *) ctx->GeometryProgram._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(struct gl_context *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->GeometryProgram._Current) {
- const struct gl_program_parameter_list *params =
- ctx->GeometryProgram._Current->Base.Parameters;
- /*FIXME: StateFlags is always 0 because we have unnamed constant
- * not state changes */
- 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(struct gl_context *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(struct gl_context *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(struct gl_context *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(struct gl_context *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(struct gl_context *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._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;
- }
-
- /*
- * 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 __struct gl_contextRec::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( struct gl_context *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_BUFFERS | _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 (new_state & _MESA_NEW_TRANSFER_STATE)
- _mesa_update_pixel( ctx, new_state );
-
- if (new_state & _DD_NEW_SEPARATE_SPECULAR)
- update_separate_specular( 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 );
- }
-
- if (new_state & (_NEW_ARRAY | _NEW_PROGRAM | _NEW_BUFFER_OBJECT))
- update_arrays( 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;
- if (!ctx->Array.RebindArrays)
- ctx->Array.RebindArrays = (new_state & (_NEW_ARRAY | _NEW_PROGRAM)) != 0;
-}
-
-
-/* This is the usual entrypoint for state updates:
- */
-void
-_mesa_update_state( struct gl_context *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( struct gl_context *ctx,
- GLbitfield varying_inputs )
-{
- if (ctx->varying_vp_inputs != varying_inputs) {
- ctx->varying_vp_inputs = varying_inputs;
- ctx->NewState |= _NEW_ARRAY;
- /*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(struct gl_context *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;
- }
-}
+/*
+ * 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 struct gl_context.
+ */
+
+
+#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"
+#include "pixel.h"
+#include "program/program.h"
+#include "program/prog_parameter.h"
+#include "shaderobj.h"
+#include "state.h"
+#include "stencil.h"
+#include "texenvprogram.h"
+#include "texobj.h"
+#include "texstate.h"
+
+
+static void
+update_separate_specular(struct gl_context *ctx)
+{
+ if (_mesa_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;
+ }
+ }
+ 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( struct gl_context *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(struct gl_context *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(struct gl_context *ctx)
+{
+ const struct gl_shader_program *vsProg = ctx->Shader.CurrentVertexProgram;
+ const struct gl_shader_program *gsProg = ctx->Shader.CurrentGeometryProgram;
+ struct gl_shader_program *fsProg = ctx->Shader.CurrentFragmentProgram;
+ const struct gl_vertex_program *prevVP = ctx->VertexProgram._Current;
+ const struct gl_fragment_program *prevFP = ctx->FragmentProgram._Current;
+ const struct gl_geometry_program *prevGP = ctx->GeometryProgram._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 (fsProg && fsProg->LinkStatus && fsProg->FragmentProgram) {
+ /* Use shader programs */
+ _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
+ fsProg->FragmentProgram);
+ _mesa_reference_shader_program(ctx, &ctx->Shader._CurrentFragmentProgram,
+ fsProg);
+ }
+ else if (ctx->FragmentProgram._Enabled) {
+ /* use user-defined fragment program */
+ _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
+ ctx->FragmentProgram.Current);
+ _mesa_reference_shader_program(ctx, &ctx->Shader._CurrentFragmentProgram,
+ NULL);
+ }
+ else if (ctx->FragmentProgram._MaintainTexEnvProgram) {
+ /* Use fragment program generated from fixed-function state.
+ */
+ struct gl_shader_program *f = _mesa_get_fixed_func_fragment_program(ctx);
+ _mesa_reference_shader_program(ctx,
+ &ctx->Shader._CurrentFragmentProgram, f);
+
+ _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
+ f->FragmentProgram);
+ }
+ else {
+ /* no fragment program */
+ _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, NULL);
+ _mesa_reference_shader_program(ctx, &ctx->Shader._CurrentFragmentProgram,
+ NULL);
+ }
+
+ if (gsProg && gsProg->LinkStatus && gsProg->GeometryProgram) {
+ /* Use shader programs */
+ _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current,
+ gsProg->GeometryProgram);
+ } else {
+ /* no fragment program */
+ _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current, NULL);
+ }
+
+ /* Examine vertex program after fragment program as
+ * _mesa_get_fixed_func_vertex_program() needs to know active
+ * fragprog inputs.
+ */
+ if (vsProg && vsProg->LinkStatus && vsProg->VertexProgram) {
+ /* Use shader programs */
+ _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
+ vsProg->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->GeometryProgram._Current != prevGP) {
+ new_state |= _NEW_PROGRAM;
+ if (ctx->Driver.BindProgram) {
+ ctx->Driver.BindProgram(ctx, MESA_GEOMETRY_PROGRAM,
+ (struct gl_program *) ctx->GeometryProgram._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(struct gl_context *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->GeometryProgram._Current) {
+ const struct gl_program_parameter_list *params =
+ ctx->GeometryProgram._Current->Base.Parameters;
+ /*FIXME: StateFlags is always 0 because we have unnamed constant
+ * not state changes */
+ 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(struct gl_context *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(struct gl_context *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(struct gl_context *ctx)
+{
+ /* This is needed to support 1.1's RGB logic ops AND
+ * 1.0's blending logicops.
+ */
+ ctx->Color._LogicOpEnabled = _mesa_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(struct gl_context *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(struct gl_context *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._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;
+ }
+
+ /*
+ * 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 (_mesa_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 __struct gl_contextRec::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( struct gl_context *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_BUFFERS | _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 (new_state & _MESA_NEW_TRANSFER_STATE)
+ _mesa_update_pixel( ctx, new_state );
+
+ if (new_state & _DD_NEW_SEPARATE_SPECULAR)
+ update_separate_specular( 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 );
+ }
+
+ if (new_state & (_NEW_ARRAY | _NEW_PROGRAM | _NEW_BUFFER_OBJECT))
+ update_arrays( 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;
+ if (!ctx->Array.RebindArrays)
+ ctx->Array.RebindArrays = (new_state & (_NEW_ARRAY | _NEW_PROGRAM)) != 0;
+}
+
+
+/* This is the usual entrypoint for state updates:
+ */
+void
+_mesa_update_state( struct gl_context *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( struct gl_context *ctx,
+ GLbitfield varying_inputs )
+{
+ if (ctx->varying_vp_inputs != varying_inputs) {
+ ctx->varying_vp_inputs = varying_inputs;
+ ctx->NewState |= _NEW_ARRAY;
+ /*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(struct gl_context *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;
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-30 17:19:38 +0000