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Diffstat (limited to 'src/mesa/swrast/s_context.c')
-rw-r--r--src/mesa/swrast/s_context.c160
1 files changed, 123 insertions, 37 deletions
diff --git a/src/mesa/swrast/s_context.c b/src/mesa/swrast/s_context.c
index f5f04b05f5..00702b4301 100644
--- a/src/mesa/swrast/s_context.c
+++ b/src/mesa/swrast/s_context.c
@@ -2,7 +2,7 @@
* Mesa 3-D graphics library
* Version: 6.5.3
*
- * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2007 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"),
@@ -31,7 +31,7 @@
#include "context.h"
#include "colormac.h"
#include "mtypes.h"
-#include "program.h"
+#include "prog_statevars.h"
#include "teximage.h"
#include "swrast.h"
#include "s_blend.h"
@@ -98,11 +98,7 @@ _swrast_update_rasterflags( GLcontext *ctx )
rasterMask |= MULTI_DRAW_BIT; /* all color index bits disabled */
}
- if (ctx->FragmentProgram._Enabled) {
- rasterMask |= FRAGPROG_BIT;
- }
-
- if (ctx->ShaderObjects._FragmentShaderPresent) {
+ if (ctx->FragmentProgram._Current) {
rasterMask |= FRAGPROG_BIT;
}
@@ -129,27 +125,28 @@ _swrast_update_rasterflags( GLcontext *ctx )
static void
_swrast_update_polygon( GLcontext *ctx )
{
- GLfloat backface_sign = 1;
+ GLfloat backface_sign;
if (ctx->Polygon.CullFlag) {
- backface_sign = 1;
- switch(ctx->Polygon.CullFaceMode) {
+ backface_sign = 1.0;
+ switch (ctx->Polygon.CullFaceMode) {
case GL_BACK:
- if(ctx->Polygon.FrontFace==GL_CCW)
- backface_sign = -1;
+ if (ctx->Polygon.FrontFace == GL_CCW)
+ backface_sign = -1.0;
break;
case GL_FRONT:
- if(ctx->Polygon.FrontFace!=GL_CCW)
- backface_sign = -1;
+ if (ctx->Polygon.FrontFace != GL_CCW)
+ backface_sign = -1.0;
break;
- default:
case GL_FRONT_AND_BACK:
- backface_sign = 0;
+ /* fallthrough */
+ default:
+ backface_sign = 0.0;
break;
}
}
else {
- backface_sign = 0;
+ backface_sign = 0.0;
}
SWRAST_CONTEXT(ctx)->_BackfaceSign = backface_sign;
@@ -165,7 +162,7 @@ _swrast_update_fog_hint( GLcontext *ctx )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
swrast->_PreferPixelFog = (!swrast->AllowVertexFog ||
- ctx->FragmentProgram._Enabled || /* not _Active! */
+ ctx->FragmentProgram._Current ||
(ctx->Hint.Fog == GL_NICEST &&
swrast->AllowPixelFog));
}
@@ -198,20 +195,14 @@ static void
_swrast_update_fog_state( GLcontext *ctx )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
/* determine if fog is needed, and if so, which fog mode */
swrast->_FogEnabled = GL_FALSE;
- if (ctx->ShaderObjects._FragmentShaderPresent) {
- swrast->_FogEnabled = GL_FALSE;
- }
- else if (ctx->FragmentProgram._Enabled) {
- if (ctx->FragmentProgram._Current->Base.Target==GL_FRAGMENT_PROGRAM_ARB) {
- const struct gl_fragment_program *fp
- = ctx->FragmentProgram._Current;
- if (fp->FogOption != GL_NONE) {
- swrast->_FogEnabled = GL_TRUE;
- swrast->_FogMode = fp->FogOption;
- }
+ if (fp && fp->Base.Target == GL_FRAGMENT_PROGRAM_ARB) {
+ if (fp->FogOption != GL_NONE) {
+ swrast->_FogEnabled = GL_TRUE;
+ swrast->_FogMode = fp->FogOption;
}
}
else if (ctx->Fog.Enabled) {
@@ -228,8 +219,8 @@ _swrast_update_fog_state( GLcontext *ctx )
static void
_swrast_update_fragment_program(GLcontext *ctx, GLbitfield newState)
{
- if (ctx->FragmentProgram._Enabled) {
- const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
+ const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
+ if (fp) {
#if 0
/* XXX Need a way to trigger the initial loading of parameters
* even when there's no recent state changes.
@@ -304,7 +295,7 @@ _swrast_validate_triangle( GLcontext *ctx,
if (ctx->Texture._EnabledUnits == 0
&& NEED_SECONDARY_COLOR(ctx)
- && !ctx->FragmentProgram._Enabled) {
+ && !ctx->FragmentProgram._Current) {
/* separate specular color, but no texture */
swrast->SpecTriangle = swrast->Triangle;
swrast->Triangle = _swrast_add_spec_terms_triangle;
@@ -328,7 +319,7 @@ _swrast_validate_line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 )
if (ctx->Texture._EnabledUnits == 0
&& NEED_SECONDARY_COLOR(ctx)
- && !ctx->FragmentProgram._Enabled) {
+ && !ctx->FragmentProgram._Current) {
swrast->SpecLine = swrast->Line;
swrast->Line = _swrast_add_spec_terms_line;
}
@@ -351,7 +342,7 @@ _swrast_validate_point( GLcontext *ctx, const SWvertex *v0 )
if (ctx->Texture._EnabledUnits == 0
&& NEED_SECONDARY_COLOR(ctx)
- && !ctx->FragmentProgram._Enabled) {
+ && !ctx->FragmentProgram._Current) {
swrast->SpecPoint = swrast->Point;
swrast->Point = _swrast_add_spec_terms_point;
}
@@ -505,11 +496,96 @@ _swrast_update_texture_samplers(GLcontext *ctx)
for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
const struct gl_texture_object *tObj = ctx->Texture.Unit[u]._Current;
+ /* Note: If tObj is NULL, the sample function will be a simple
+ * function that just returns opaque black (0,0,0,1).
+ */
swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj);
}
}
+/**
+ * Update the swrast->_FragmentAttribs field.
+ */
+static void
+_swrast_update_fragment_attribs(GLcontext *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (ctx->FragmentProgram._Current) {
+ swrast->_FragmentAttribs
+ = ctx->FragmentProgram._Current->Base.InputsRead;
+ }
+ else {
+ GLuint u;
+ swrast->_FragmentAttribs = 0x0;
+
+ if (ctx->Depth.Test)
+ swrast->_FragmentAttribs |= FRAG_BIT_WPOS;
+ if (NEED_SECONDARY_COLOR(ctx))
+ swrast->_FragmentAttribs |= FRAG_BIT_COL1;
+ if (swrast->_FogEnabled)
+ swrast->_FragmentAttribs |= FRAG_BIT_FOGC;
+
+ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
+ swrast->_FragmentAttribs |= FRAG_BIT_TEX(u);
+ }
+ }
+ }
+
+ /* Find lowest, highest bit set in _FragmentAttribs */
+ {
+ GLuint bits = swrast->_FragmentAttribs;
+ GLuint i = 0;;
+ while (bits) {
+ i++;
+ bits = bits >> 1;
+ }
+ swrast->_MaxFragmentAttrib = i;
+ swrast->_MinFragmentAttrib = FRAG_ATTRIB_TEX0; /* XXX temporary */
+ }
+}
+
+
+/**
+ * Update the swrast->_ColorOutputsMask which indicates which color
+ * renderbuffers (aka rendertargets) are being written to by the current
+ * fragment program.
+ * We also take glDrawBuffers() into account to skip outputs that are
+ * set to GL_NONE.
+ */
+static void
+_swrast_update_color_outputs(GLcontext *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const struct gl_framebuffer *fb = ctx->DrawBuffer;
+
+ swrast->_ColorOutputsMask = 0;
+ swrast->_NumColorOutputs = 0;
+
+ if (ctx->FragmentProgram._Current) {
+ const GLbitfield outputsWritten
+ = ctx->FragmentProgram._Current->Base.OutputsWritten;
+ GLuint output;
+ for (output = 0; output < ctx->Const.MaxDrawBuffers; output++) {
+ if ((outputsWritten & (1 << (FRAG_RESULT_DATA0 + output)))
+ && (fb->_NumColorDrawBuffers[output] > 0)) {
+ swrast->_ColorOutputsMask |= (1 << output);
+ swrast->_NumColorOutputs = output + 1;
+ }
+ }
+ }
+ if (swrast->_ColorOutputsMask == 0x0) {
+ /* no fragment program, or frag prog didn't write to gl_FragData[] */
+ if (fb->_NumColorDrawBuffers[0] > 0) {
+ swrast->_ColorOutputsMask = 0x1;
+ swrast->_NumColorOutputs = 1;
+ }
+ }
+}
+
+
void
_swrast_validate_derived( GLcontext *ctx )
{
@@ -550,6 +626,15 @@ _swrast_validate_derived( GLcontext *ctx )
if (swrast->NewState & _SWRAST_NEW_RASTERMASK)
_swrast_update_rasterflags( ctx );
+ if (swrast->NewState & (_NEW_DEPTH |
+ _NEW_FOG |
+ _NEW_PROGRAM |
+ _NEW_TEXTURE))
+ _swrast_update_fragment_attribs(ctx);
+
+ if (swrast->NewState & (_NEW_PROGRAM | _NEW_BUFFERS))
+ _swrast_update_color_outputs(ctx);
+
swrast->NewState = 0;
swrast->StateChanges = 0;
swrast->InvalidateState = _swrast_invalidate_state;
@@ -707,7 +792,6 @@ _swrast_CreateContext( GLcontext *ctx )
/* init point span buffer */
swrast->PointSpan.primitive = GL_POINT;
- swrast->PointSpan.start = 0;
swrast->PointSpan.end = 0;
swrast->PointSpan.facing = 0;
swrast->PointSpan.array = swrast->SpanArrays;
@@ -810,8 +894,10 @@ _swrast_print_vertex( GLcontext *ctx, const SWvertex *v )
for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
if (ctx->Texture.Unit[i]._ReallyEnabled)
_mesa_debug(ctx, "texcoord[%d] %f %f %f %f\n", i,
- v->texcoord[i][0], v->texcoord[i][1],
- v->texcoord[i][2], v->texcoord[i][3]);
+ v->attrib[FRAG_ATTRIB_TEX0 + i][0],
+ v->attrib[FRAG_ATTRIB_TEX0 + i][1],
+ v->attrib[FRAG_ATTRIB_TEX0 + i][2],
+ v->attrib[FRAG_ATTRIB_TEX0 + i][3]);
#if CHAN_TYPE == GL_FLOAT
_mesa_debug(ctx, "color %f %f %f %f\n",
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-04 12:01:22 +0000