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author | marha <marha@users.sourceforge.net> | 2011-09-12 11:27:51 +0200 |
---|---|---|
committer | marha <marha@users.sourceforge.net> | 2011-09-12 11:27:51 +0200 |
commit | dafebc5bb70303f0b5baf0b087cf4d9a64b5c7f0 (patch) | |
tree | bdf833cc6a4fc9035411779e10dd9e8478201885 /mesalib/src/mesa/main/state.c | |
parent | 0b40f5f4b54453a77f4b09c431f8efc6875da61f (diff) | |
download | vcxsrv-dafebc5bb70303f0b5baf0b087cf4d9a64b5c7f0.tar.gz vcxsrv-dafebc5bb70303f0b5baf0b087cf4d9a64b5c7f0.tar.bz2 vcxsrv-dafebc5bb70303f0b5baf0b087cf4d9a64b5c7f0.zip |
Synchronised line endinge with release branch
Diffstat (limited to 'mesalib/src/mesa/main/state.c')
-rw-r--r-- | mesalib/src/mesa/main/state.c | 1520 |
1 files changed, 760 insertions, 760 deletions
diff --git a/mesalib/src/mesa/main/state.c b/mesalib/src/mesa/main/state.c index 9c82bfaf0..457a730de 100644 --- a/mesalib/src/mesa/main/state.c +++ b/mesalib/src/mesa/main/state.c @@ -1,760 +1,760 @@ -/*
- * 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"
-#include "varray.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;
-}
-
-
-/**
- * Helper for update_arrays().
- * \return min(current min, array->_MaxElement).
- */
-static GLuint
-update_min(GLuint min, struct gl_client_array *array)
-{
- _mesa_update_array_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 user-defined ARB/NV vertex/fragment
- * program is enabled AND valid. Similarly for ATI fragment shaders.
- * GLSL shaders not relevant here.
- */
- 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 the ctx->Vertex/Geometry/FragmentProgram._Current pointers to point
- * to the current/active programs. Then call ctx->Driver.BindProgram() to
- * tell the driver which programs to use.
- *
- * Programs may come from 3 sources: GLSL shaders, ARB/NV_vertex/fragment
- * programs or programs derived from fixed-function state.
- *
- * 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 GLSL fragment shader */
- _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
- fsProg->FragmentProgram);
- }
- else if (ctx->FragmentProgram._Enabled) {
- /* Use user-defined fragment 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 GLSL geometry shader */
- _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current,
- gsProg->GeometryProgram);
- } else {
- /* No geometry 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 GLSL vertex shader */
- _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);
-}
-
-
-/**
- * Update the ctx->Color._ClampFragmentColor field
- */
-static void
-update_clamp_fragment_color(struct gl_context *ctx)
-{
- if (ctx->Color.ClampFragmentColor == GL_FIXED_ONLY_ARB)
- ctx->Color._ClampFragmentColor =
- !ctx->DrawBuffer || !ctx->DrawBuffer->Visual.floatMode;
- else
- ctx->Color._ClampFragmentColor = ctx->Color.ClampFragmentColor;
-}
-
-
-/**
- * Update the ctx->Color._ClampVertexColor field
- */
-static void
-update_clamp_vertex_color(struct gl_context *ctx)
-{
- if (ctx->Light.ClampVertexColor == GL_FIXED_ONLY_ARB)
- ctx->Light._ClampVertexColor =
- !ctx->DrawBuffer || !ctx->DrawBuffer->Visual.floatMode;
- else
- ctx->Light._ClampVertexColor = ctx->Light.ClampVertexColor;
-}
-
-
-/**
- * Update the ctx->Color._ClampReadColor field
- */
-static void
-update_clamp_read_color(struct gl_context *ctx)
-{
- if (ctx->Color.ClampReadColor == GL_FIXED_ONLY_ARB)
- ctx->Color._ClampReadColor =
- !ctx->ReadBuffer || !ctx->ReadBuffer->Visual.floatMode;
- else
- ctx->Color._ClampReadColor = ctx->Color.ClampReadColor;
-}
-
-
-
-
-/*
- * 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 | _NEW_FRAG_CLAMP);
- }
- 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_LIGHT | _NEW_BUFFERS))
- update_clamp_vertex_color(ctx);
-
- if (new_state & (_NEW_STENCIL | _NEW_BUFFERS))
- _mesa_update_stencil( ctx );
-
- if (new_state & _NEW_PIXEL)
- _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 | _NEW_BUFFERS))
- update_multisample( ctx );
-
- if (new_state & _NEW_COLOR)
- update_color( ctx );
-
- if (new_state & (_NEW_COLOR | _NEW_BUFFERS))
- update_clamp_read_color(ctx);
-
- if(new_state & (_NEW_FRAG_CLAMP | _NEW_BUFFERS))
- update_clamp_fragment_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 "state.h" +#include "stencil.h" +#include "texenvprogram.h" +#include "texobj.h" +#include "texstate.h" +#include "varray.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; +} + + +/** + * Helper for update_arrays(). + * \return min(current min, array->_MaxElement). + */ +static GLuint +update_min(GLuint min, struct gl_client_array *array) +{ + _mesa_update_array_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 user-defined ARB/NV vertex/fragment + * program is enabled AND valid. Similarly for ATI fragment shaders. + * GLSL shaders not relevant here. + */ + 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 the ctx->Vertex/Geometry/FragmentProgram._Current pointers to point + * to the current/active programs. Then call ctx->Driver.BindProgram() to + * tell the driver which programs to use. + * + * Programs may come from 3 sources: GLSL shaders, ARB/NV_vertex/fragment + * programs or programs derived from fixed-function state. + * + * 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 GLSL fragment shader */ + _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, + fsProg->FragmentProgram); + } + else if (ctx->FragmentProgram._Enabled) { + /* Use user-defined fragment 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 GLSL geometry shader */ + _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current, + gsProg->GeometryProgram); + } else { + /* No geometry 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 GLSL vertex shader */ + _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); +} + + +/** + * Update the ctx->Color._ClampFragmentColor field + */ +static void +update_clamp_fragment_color(struct gl_context *ctx) +{ + if (ctx->Color.ClampFragmentColor == GL_FIXED_ONLY_ARB) + ctx->Color._ClampFragmentColor = + !ctx->DrawBuffer || !ctx->DrawBuffer->Visual.floatMode; + else + ctx->Color._ClampFragmentColor = ctx->Color.ClampFragmentColor; +} + + +/** + * Update the ctx->Color._ClampVertexColor field + */ +static void +update_clamp_vertex_color(struct gl_context *ctx) +{ + if (ctx->Light.ClampVertexColor == GL_FIXED_ONLY_ARB) + ctx->Light._ClampVertexColor = + !ctx->DrawBuffer || !ctx->DrawBuffer->Visual.floatMode; + else + ctx->Light._ClampVertexColor = ctx->Light.ClampVertexColor; +} + + +/** + * Update the ctx->Color._ClampReadColor field + */ +static void +update_clamp_read_color(struct gl_context *ctx) +{ + if (ctx->Color.ClampReadColor == GL_FIXED_ONLY_ARB) + ctx->Color._ClampReadColor = + !ctx->ReadBuffer || !ctx->ReadBuffer->Visual.floatMode; + else + ctx->Color._ClampReadColor = ctx->Color.ClampReadColor; +} + + + + +/* + * 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 | _NEW_FRAG_CLAMP); + } + 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_LIGHT | _NEW_BUFFERS)) + update_clamp_vertex_color(ctx); + + if (new_state & (_NEW_STENCIL | _NEW_BUFFERS)) + _mesa_update_stencil( ctx ); + + if (new_state & _NEW_PIXEL) + _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 | _NEW_BUFFERS)) + update_multisample( ctx ); + + if (new_state & _NEW_COLOR) + update_color( ctx ); + + if (new_state & (_NEW_COLOR | _NEW_BUFFERS)) + update_clamp_read_color(ctx); + + if(new_state & (_NEW_FRAG_CLAMP | _NEW_BUFFERS)) + update_clamp_fragment_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; + } +} |