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Implemented GL_ARB_texture_env_crossbar.

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Simplification of some of the texture application code.
This commit is contained in:
Brian Paul
2002-05-02 00:59:20 +00:00
parent c450d57991
commit f595212336
9 changed files with 300 additions and 261 deletions
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4
src/mesa/main/extensions.c
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@@ -1,4 +1,4 @@
/* $Id: extensions.c,v 1.72 2002/04/02 16:15:17 brianp Exp $ */
/* $Id: extensions.c,v 1.73 2002/05/02 00:59:20 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -68,6 +68,7 @@ static struct {
{ OFF, "GL_ARB_texture_cube_map", F(ARB_texture_cube_map) },
{ OFF, "GL_ARB_texture_env_add", F(EXT_texture_env_add) },
{ OFF, "GL_ARB_texture_env_combine", F(ARB_texture_env_combine) },
{ OFF, "GL_ARB_texture_env_crossbar", F(ARB_texture_env_crossbar) },
{ OFF, "GL_ARB_texture_env_dot3", F(ARB_texture_env_dot3) },
{ OFF, "GL_ARB_texture_mirrored_repeat", F(ARB_texture_mirrored_repeat)},
{ ON, "GL_ARB_transpose_matrix", 0 },
@@ -150,6 +151,7 @@ _mesa_enable_sw_extensions(GLcontext *ctx)
"GL_ARB_texture_cube_map",
"GL_ARB_texture_env_add",
"GL_ARB_texture_env_combine",
"GL_ARB_texture_env_crossbar",
"GL_ARB_texture_env_dot3",
"GL_ARB_texture_mirrored_repeat",
"GL_EXT_blend_color",

3
src/mesa/main/mtypes.h
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@@ -1,4 +1,4 @@
/* $Id: mtypes.h,v 1.73 2002/04/21 20:37:04 brianp Exp $ */
/* $Id: mtypes.h,v 1.74 2002/05/02 00:59:20 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -1389,6 +1389,7 @@ struct gl_extensions {
GLboolean ARB_texture_compression;
GLboolean ARB_texture_cube_map;
GLboolean ARB_texture_env_combine;
GLboolean ARB_texture_env_crossbar;
GLboolean ARB_texture_env_dot3;
GLboolean ARB_texture_mirrored_repeat;
GLboolean ARB_window_pos;

140
src/mesa/main/texstate.c
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@@ -1,4 +1,4 @@
/* $Id: texstate.c,v 1.70 2002/04/26 13:40:11 brianp Exp $ */
/* $Id: texstate.c,v 1.71 2002/05/02 00:59:20 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -77,40 +77,31 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
if (target==GL_TEXTURE_ENV) {
switch (pname) {
case GL_TEXTURE_ENV_MODE: {
GLenum mode = (GLenum) (GLint) *param;
switch (mode) {
case GL_ADD:
if (!ctx->Extensions.EXT_texture_env_add) {
TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
return;
}
break;
case GL_COMBINE_EXT:
if (!ctx->Extensions.EXT_texture_env_combine &&
!ctx->Extensions.ARB_texture_env_combine) {
TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
return;
}
break;
case GL_MODULATE:
case GL_BLEND:
case GL_DECAL:
case GL_REPLACE:
break;
default:
TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
return;
}
case GL_TEXTURE_ENV_MODE:
{
const GLenum mode = (GLenum) (GLint) *param;
if (mode == GL_MODULATE ||
mode == GL_BLEND ||
mode == GL_DECAL ||
mode == GL_REPLACE ||
(mode == GL_ADD && ctx->Extensions.EXT_texture_env_add) ||
(mode == GL_COMBINE_EXT &&
(ctx->Extensions.EXT_texture_env_combine ||
ctx->Extensions.ARB_texture_env_combine))) {
/* legal */
if (texUnit->EnvMode == mode)
return;
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
texUnit->EnvMode = mode;
break;
}
case GL_TEXTURE_ENV_COLOR: {
else {
TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
return;
}
}
break;
case GL_TEXTURE_ENV_COLOR:
{
GLfloat tmp[4];
tmp[0] = CLAMP( param[0], 0.0F, 1.0F );
tmp[1] = CLAMP( param[1], 0.0F, 1.0F );
@@ -120,8 +111,8 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
return;
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
COPY_4FV(texUnit->EnvColor, tmp);
break;
}
break;
case GL_COMBINE_RGB_EXT:
if (ctx->Extensions.EXT_texture_env_combine ||
ctx->Extensions.ARB_texture_env_combine) {
@@ -172,29 +163,24 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
if (ctx->Extensions.EXT_texture_env_combine ||
ctx->Extensions.ARB_texture_env_combine) {
const GLenum mode = (GLenum) (GLint) *param;
switch (mode) {
case GL_REPLACE:
case GL_MODULATE:
case GL_ADD:
case GL_ADD_SIGNED_EXT:
case GL_INTERPOLATE_EXT:
/* OK */
break;
case GL_SUBTRACT_ARB:
if (!ctx->Extensions.ARB_texture_env_combine) {
TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
return;
}
break;
default:
TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
return;
}
if (mode == GL_REPLACE ||
mode == GL_MODULATE ||
mode == GL_ADD ||
mode == GL_ADD_SIGNED_EXT ||
mode == GL_INTERPOLATE_EXT ||
(mode == GL_SUBTRACT_ARB &&
ctx->Extensions.ARB_texture_env_combine)) {
/* legal */
if (texUnit->CombineModeA == mode)
return;
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
texUnit->CombineModeA = mode;
}
else {
TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
return;
}
}
else {
TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
return;
@@ -205,19 +191,22 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
case GL_SOURCE2_RGB_EXT:
if (ctx->Extensions.EXT_texture_env_combine ||
ctx->Extensions.ARB_texture_env_combine) {
GLenum source = (GLenum) (GLint) *param;
GLuint s = pname - GL_SOURCE0_RGB_EXT;
switch (source) {
case GL_TEXTURE:
case GL_CONSTANT_EXT:
case GL_PRIMARY_COLOR_EXT:
case GL_PREVIOUS_EXT:
const GLenum source = (GLenum) (GLint) *param;
const GLuint s = pname - GL_SOURCE0_RGB_EXT;
if (source == GL_TEXTURE ||
source == GL_CONSTANT_EXT ||
source == GL_PRIMARY_COLOR_EXT ||
source == GL_PREVIOUS_EXT ||
(ctx->Extensions.ARB_texture_env_crossbar &&
source >= GL_TEXTURE0_ARB &&
source < GL_TEXTURE0_ARB + ctx->Const.MaxTextureUnits)) {
/* legal */
if (texUnit->CombineSourceRGB[s] == source)
return;
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
texUnit->CombineSourceRGB[s] = source;
break;
default:
}
else {
TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", source);
return;
}
@@ -232,18 +221,22 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
case GL_SOURCE2_ALPHA_EXT:
if (ctx->Extensions.EXT_texture_env_combine ||
ctx->Extensions.ARB_texture_env_combine) {
GLenum source = (GLenum) (GLint) *param;
GLuint s = pname - GL_SOURCE0_ALPHA_EXT;
switch (source) {
case GL_TEXTURE:
case GL_CONSTANT_EXT:
case GL_PRIMARY_COLOR_EXT:
case GL_PREVIOUS_EXT:
if (texUnit->CombineSourceA[s] == source) return;
const GLenum source = (GLenum) (GLint) *param;
const GLuint s = pname - GL_SOURCE0_ALPHA_EXT;
if (source == GL_TEXTURE ||
source == GL_CONSTANT_EXT ||
source == GL_PRIMARY_COLOR_EXT ||
source == GL_PREVIOUS_EXT ||
(ctx->Extensions.ARB_texture_env_crossbar &&
source >= GL_TEXTURE0_ARB &&
source < GL_TEXTURE0_ARB + ctx->Const.MaxTextureUnits)) {
/* legal */
if (texUnit->CombineSourceA[s] == source)
return;
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
texUnit->CombineSourceA[s] = source;
break;
default:
}
else {
TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", source);
return;
}
@@ -257,8 +250,8 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
case GL_OPERAND1_RGB_EXT:
if (ctx->Extensions.EXT_texture_env_combine ||
ctx->Extensions.ARB_texture_env_combine) {
GLenum operand = (GLenum) (GLint) *param;
GLuint s = pname - GL_OPERAND0_RGB_EXT;
const GLenum operand = (GLenum) (GLint) *param;
const GLuint s = pname - GL_OPERAND0_RGB_EXT;
switch (operand) {
case GL_SRC_COLOR:
case GL_ONE_MINUS_SRC_COLOR:
@@ -283,7 +276,7 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
case GL_OPERAND1_ALPHA_EXT:
if (ctx->Extensions.EXT_texture_env_combine ||
ctx->Extensions.ARB_texture_env_combine) {
GLenum operand = (GLenum) (GLint) *param;
const GLenum operand = (GLenum) (GLint) *param;
switch (operand) {
case GL_SRC_ALPHA:
case GL_ONE_MINUS_SRC_ALPHA:
@@ -306,7 +299,7 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
case GL_OPERAND2_RGB_EXT:
if (ctx->Extensions.EXT_texture_env_combine ||
ctx->Extensions.ARB_texture_env_combine) {
GLenum operand = (GLenum) (GLint) *param;
const GLenum operand = (GLenum) (GLint) *param;
switch (operand) {
case GL_SRC_COLOR: /* ARB combine only */
case GL_ONE_MINUS_SRC_COLOR: /* ARB combine only */
@@ -329,7 +322,7 @@ _mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
case GL_OPERAND2_ALPHA_EXT:
if (ctx->Extensions.EXT_texture_env_combine ||
ctx->Extensions.ARB_texture_env_combine) {
GLenum operand = (GLenum) (GLint) *param;
const GLenum operand = (GLenum) (GLint) *param;
switch (operand) {
case GL_SRC_ALPHA:
case GL_ONE_MINUS_SRC_ALPHA: /* ARB combine only */
@@ -1261,6 +1254,7 @@ _mesa_GetTexLevelParameteriv( GLenum target, GLint level,
GLint maxLevels;
ASSERT_OUTSIDE_BEGIN_END(ctx);
/* this will catch bad target values */
dimensions = tex_image_dimensions(ctx, target); /* 1, 2 or 3 */
if (dimensions == 0) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(target)");

50
src/mesa/swrast/s_context.c
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@@ -1,4 +1,4 @@
/* $Id: s_context.c,v 1.31 2002/04/19 14:05:50 brianp Exp $ */
/* $Id: s_context.c,v 1.32 2002/05/02 00:59:20 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -40,9 +40,6 @@
#include "s_texture.h"
/*
* Recompute the value of swrast->_RasterMask, etc. according to
* the current context.
@@ -145,6 +142,26 @@ _swrast_update_hint( GLcontext *ctx )
swrast->AllowPixelFog));
}
/*
* Update the swrast->_AnyTextureCombine flag.
*/
static void
_swrast_update_texture_env( GLcontext *ctx )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLuint i;
swrast->_AnyTextureCombine = GL_FALSE;
for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
if (ctx->Texture.Unit[i].EnvMode == GL_COMBINE_EXT ||
ctx->Texture.Unit[i].EnvMode == GL_COMBINE4_NV) {
swrast->_AnyTextureCombine = GL_TRUE;
return;
}
}
}
#define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \
_NEW_TEXTURE | \
_NEW_HINT | \
@@ -183,6 +200,8 @@ _swrast_update_hint( GLcontext *ctx )
#define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
#define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
#define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
@@ -315,7 +334,6 @@ _swrast_invalidate_state( GLcontext *ctx, GLuint new_state )
for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++)
swrast->TextureSample[i] = _swrast_validate_texture_sample;
if (ctx->Visual.rgbMode) {
ASSERT(swrast->Driver.WriteRGBASpan);
ASSERT(swrast->Driver.WriteRGBSpan);
@@ -334,18 +352,15 @@ _swrast_invalidate_state( GLcontext *ctx, GLuint new_state )
ASSERT(swrast->Driver.ReadCI32Span);
ASSERT(swrast->Driver.ReadCI32Pixels);
}
}
void
_swrast_validate_derived( GLcontext *ctx )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (swrast->NewState)
{
if (swrast->NewState) {
if (swrast->NewState & _SWRAST_NEW_RASTERMASK)
_swrast_update_rasterflags( ctx );
@@ -355,6 +370,9 @@ _swrast_validate_derived( GLcontext *ctx )
if (swrast->NewState & _NEW_HINT)
_swrast_update_hint( ctx );
if (swrast->NewState & _SWRAST_NEW_TEXTURE_ENV_MODE)
_swrast_update_texture_env( ctx );
swrast->NewState = 0;
swrast->StateChanges = 0;
swrast->InvalidateState = _swrast_invalidate_state;
@@ -490,7 +508,6 @@ _swrast_CreateContext( GLcontext *ctx )
swrast->_IntegerAccumMode = GL_TRUE;
swrast->_IntegerAccumScaler = 0.0;
for (i = 0 ; i < MAX_TEXTURE_UNITS ; i++)
swrast->TextureSample[i] = _swrast_validate_texture_sample;
@@ -500,6 +517,17 @@ _swrast_CreateContext( GLcontext *ctx )
return GL_FALSE;
}
assert(ctx->Const.MaxTextureUnits > 0);
assert(ctx->Const.MaxTextureUnits <= MAX_TEXTURE_UNITS);
swrast->TexelBuffer = (GLchan *) MALLOC(ctx->Const.MaxTextureUnits *
MAX_WIDTH * 4 * sizeof(GLchan));
if (!swrast->TexelBuffer) {
FREE(swrast->span);
FREE(swrast);
return GL_FALSE;
}
ctx->swrast_context = swrast;
return GL_TRUE;
@@ -515,7 +543,7 @@ _swrast_DestroyContext( GLcontext *ctx )
}
FREE( swrast->span );
FREE( swrast->TexelBuffer );
FREE( swrast );
ctx->swrast_context = 0;

8
src/mesa/swrast/s_context.h
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@@ -1,4 +1,4 @@
/* $Id: s_context.h,v 1.17 2002/04/19 14:05:50 brianp Exp $ */
/* $Id: s_context.h,v 1.18 2002/05/02 00:59:20 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -124,6 +124,7 @@ typedef struct
GLfloat _MinMagThresh[MAX_TEXTURE_UNITS];
GLfloat _backface_sign;
GLboolean _PreferPixelFog;
GLboolean _AnyTextureCombine;
/* Accum buffer temporaries.
*/
@@ -176,6 +177,11 @@ typedef struct
blend_func BlendFunc;
TextureSampleFunc TextureSample[MAX_TEXTURE_UNITS];
/** Buffer for saving the sampled texture colors.
* Needed for GL_ARB_texture_env_crossbar implementation.
*/
GLchan *TexelBuffer;
} SWcontext;

43
src/mesa/swrast/s_pixeltex.c
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@@ -1,4 +1,4 @@
/* $Id: s_pixeltex.c,v 1.8 2002/04/12 15:39:59 brianp Exp $ */
/* $Id: s_pixeltex.c,v 1.9 2002/05/02 00:59:20 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -85,47 +85,34 @@ pixeltexgen(GLcontext *ctx, GLuint n, const GLchan rgba[][4],
/*
* Used byglDraw/CopyPixels: the incoming image colors are treated
* Used by glDraw/CopyPixels: the incoming image colors are treated
* as texture coordinates. Use those coords to texture the image.
* This is for GL_SGIS_pixel_texture / GL_SGIX_pixel_texture.
*/
void
_swrast_pixel_texture(GLcontext *ctx, struct sw_span *span)
{
if (ctx->Texture._ReallyEnabled & ~TEXTURE0_ANY) {
/* multitexture! */
GLchan primary_rgba[MAX_WIDTH][4];
GLuint unit;
ASSERT(!(span->arrayMask & SPAN_TEXTURE));
span->arrayMask |= SPAN_TEXTURE;
MEMCPY(primary_rgba, span->color.rgba, 4 * span->end * sizeof(GLchan));
for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
if (ctx->Texture.Unit[unit]._ReallyEnabled) {
pixeltexgen(ctx, span->end,
/* convert colors into texture coordinates */
pixeltexgen( ctx, span->end,
(const GLchan (*)[4]) span->color.rgba,
span->texcoords[unit]);
_swrast_texture_fragments(ctx, unit, span,
(CONST GLchan (*)[4]) primary_rgba);
span->texcoords[0] );
/* copy the new texture units for all enabled units */
for (unit = 1; unit < ctx->Const.MaxTextureUnits; unit++) {
if (ctx->Texture.Unit[unit]._ReallyEnabled) {
MEMCPY( span->texcoords[unit], span->texcoords[0],
span->end * 4 * sizeof(GLfloat) );
}
}
/* apply texture mapping */
_swrast_texture_span( ctx, span );
/* this is a work-around to be fixed by initializing again span */
span->arrayMask &= ~SPAN_TEXTURE;
}
else {
/* single texture, unit 0 */
ASSERT(ctx->Texture._ReallyEnabled & TEXTURE0_ANY);
ASSERT(!(span->arrayMask & SPAN_TEXTURE));
span->arrayMask |= SPAN_TEXTURE;
pixeltexgen(ctx, span->end,
(const GLchan (*)[4]) span->color.rgba,
span->texcoords[0]);
_swrast_texture_fragments(ctx, 0, span,
(CONST GLchan (*)[4]) span->color.rgba);
/* this is a work-around to be fixed */
span->arrayMask &= ~SPAN_TEXTURE;
}
}

6
src/mesa/swrast/s_span.c
View File

@@ -1,4 +1,4 @@
/* $Id: s_span.c,v 1.41 2002/04/20 17:54:55 brianp Exp $ */
/* $Id: s_span.c,v 1.42 2002/05/02 00:59:20 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -1171,7 +1171,7 @@ _mesa_write_texture_span( GLcontext *ctx, struct sw_span *span)
/* Texturing without alpha is done after depth-testing which
* gives a potential speed-up.
*/
_swrast_multitexture_fragments( ctx, span );
_swrast_texture_span( ctx, span );
/* Do the alpha test */
if (!_mesa_alpha_test(ctx, span)) {
@@ -1220,7 +1220,7 @@ _mesa_write_texture_span( GLcontext *ctx, struct sw_span *span)
if ((span->interpMask & SPAN_RGBA) && (span->arrayMask & SPAN_RGBA) == 0)
interpolate_colors(ctx, span);
_swrast_multitexture_fragments( ctx, span );
_swrast_texture_span( ctx, span );
}
ASSERT(span->arrayMask & SPAN_RGBA);

239
src/mesa/swrast/s_texture.c
View File

@@ -1,4 +1,4 @@
/* $Id: s_texture.c,v 1.61 2002/04/19 00:38:27 brianp Exp $ */
/* $Id: s_texture.c,v 1.62 2002/05/02 00:59:20 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -2394,6 +2394,9 @@ sample_depth_texture2(const GLcontext *ctx,
#endif
/**
* We use this function when a texture object is in an "incomplete" state.
*/
static void
null_sample_func( GLcontext *ctx, GLuint texUnit,
const struct gl_texture_object *tObj, GLuint n,
@@ -2404,12 +2407,7 @@ null_sample_func( GLcontext *ctx, GLuint texUnit,
/**********************************************************************/
/* Texture Sampling Setup */
/**********************************************************************/
/*
/**
* Setup the texture sampling function for this texture object.
*/
void
@@ -2516,17 +2514,27 @@ _swrast_choose_texture_sample_func( GLcontext *ctx, GLuint texUnit,
#define PROD(A,B) ( (GLuint)(A) * ((GLuint)(B)+1) )
#define S_PROD(A,B) ( (GLint)(A) * ((GLint)(B)+1) )
/**
* Do texture application for GL_ARB/EXT_texture_env_combine.
* Input:
* ctx - rendering context
* textureUnit - the texture unit to apply
* n - number of fragments to process (span width)
* primary_rgba - incoming fragment color array
* texelBuffer - pointer to texel colors for all texture units
* Input/Output:
* rgba - incoming colors, which get modified here
*/
static INLINE void
texture_combine(const GLcontext *ctx,
const struct gl_texture_unit *textureUnit,
GLuint n,
texture_combine( const GLcontext *ctx, GLuint unit, GLuint n,
CONST GLchan (*primary_rgba)[4],
CONST GLchan (*texel)[4],
GLchan (*rgba)[4])
CONST GLchan *texelBuffer,
GLchan (*rgba)[4] )
{
const struct gl_texture_unit *textureUnit = &(ctx->Texture.Unit[unit]);
const GLchan (*argRGB [3])[4];
const GLchan (*argA [3])[4];
GLuint i, j;
const GLuint RGBshift = textureUnit->CombineScaleShiftRGB;
const GLuint Ashift = textureUnit->CombineScaleShiftA;
#if CHAN_TYPE == GL_FLOAT
@@ -2535,12 +2543,16 @@ texture_combine(const GLcontext *ctx,
#else
const GLint half = (CHAN_MAX + 1) / 2;
#endif
GLuint i, j;
/* GLchan ccolor[3][4]; */
DEFMNARRAY(GLchan, ccolor, 3, 3 * MAX_WIDTH, 4); /* mac 32k limitation */
CHECKARRAY(ccolor, return); /* mac 32k limitation */
ASSERT(ctx->Extensions.EXT_texture_env_combine ||
ctx->Extensions.ARB_texture_env_combine);
ASSERT(SWRAST_CONTEXT(ctx)->_AnyTextureCombine);
/*
printf("modeRGB 0x%x modeA 0x%x srcRGB1 0x%x srcA1 0x%x srcRGB2 0x%x srcA2 0x%x\n",
@@ -2556,9 +2568,13 @@ texture_combine(const GLcontext *ctx,
* Do operand setup for up to 3 operands. Loop over the terms.
*/
for (j = 0; j < 3; j++) {
switch (textureUnit->CombineSourceA[j]) {
const GLenum srcA = textureUnit->CombineSourceA[j];
const GLenum srcRGB = textureUnit->CombineSourceRGB[j];
switch (srcA) {
case GL_TEXTURE:
argA[j] = texel;
argA[j] = (const GLchan (*)[4])
(texelBuffer + unit * (n * 4 * sizeof(GLchan)));
break;
case GL_PRIMARY_COLOR_EXT:
argA[j] = primary_rgba;
@@ -2576,12 +2592,21 @@ texture_combine(const GLcontext *ctx,
}
break;
default:
_mesa_problem(ctx, "invalid combine source");
/* ARB_texture_env_crossbar source */
{
const GLuint srcUnit = srcA - GL_TEXTURE0_ARB;
ASSERT(srcUnit < ctx->Const.MaxTextureUnits);
if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled)
return;
argA[j] = (const GLchan (*)[4])
(texelBuffer + srcUnit * (n * 4 * sizeof(GLchan)));
}
}
switch (textureUnit->CombineSourceRGB[j]) {
switch (srcRGB) {
case GL_TEXTURE:
argRGB[j] = texel;
argRGB[j] = (const GLchan (*)[4])
(texelBuffer + unit * (n * 4 * sizeof(GLchan)));
break;
case GL_PRIMARY_COLOR_EXT:
argRGB[j] = primary_rgba;
@@ -2607,7 +2632,16 @@ texture_combine(const GLcontext *ctx,
}
break;
default:
_mesa_problem(ctx, "invalid combine source");
/* ARB_texture_env_crossbar source */
{
const GLuint srcUnit = srcRGB - GL_TEXTURE0_ARB;
ASSERT(srcUnit < ctx->Const.MaxTextureUnits);
if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled)
return;
argRGB[j] = (const GLchan (*)[4])
(texelBuffer + srcUnit * (n * 4 * sizeof(GLchan)));
printf("unit %d from unit %d\n", unit, srcUnit);
}
}
if (textureUnit->CombineOperandRGB[j] != GL_SRC_COLOR) {
@@ -2991,14 +3025,23 @@ texture_combine(const GLcontext *ctx,
#undef PROD
/**********************************************************************/
/* Texture Application */
/**********************************************************************/
/**
* Implement NVIDIA's GL_NV_texture_env_combine4 extension when
* texUnit->EnvMode == GL_COMBINE4_NV.
*/
static INLINE void
texture_combine4( const GLcontext *ctx, GLuint unit, GLuint n,
CONST GLchan (*primary_rgba)[4],
CONST GLchan *texelBuffer,
GLchan (*rgba)[4] )
{
}
/*
* Combine incoming fragment color with texel color to produce output color.
/**
* Apply a conventional OpenGL texture env mode (REPLACE, ADD, BLEND,
* MODULATE, or DECAL) to an array of fragments.
* Input: textureUnit - pointer to texture unit to apply
* format - base internal texture format
* n - number of fragments
@@ -3008,7 +3051,7 @@ texture_combine(const GLcontext *ctx,
* according to the texture environment mode.
*/
static void
apply_texture( const GLcontext *ctx,
texture_apply( const GLcontext *ctx,
const struct gl_texture_unit *texUnit,
GLuint n,
CONST GLchan primary_rgba[][4], CONST GLchan texel[][4],
@@ -3087,7 +3130,7 @@ apply_texture( const GLcontext *ctx,
}
break;
default:
_mesa_problem(ctx, "Bad format (GL_REPLACE) in apply_texture");
_mesa_problem(ctx, "Bad format (GL_REPLACE) in texture_apply");
return;
}
break;
@@ -3153,7 +3196,7 @@ apply_texture( const GLcontext *ctx,
}
break;
default:
_mesa_problem(ctx, "Bad format (GL_MODULATE) in apply_texture");
_mesa_problem(ctx, "Bad format (GL_MODULATE) in texture_apply");
return;
}
break;
@@ -3186,7 +3229,7 @@ apply_texture( const GLcontext *ctx,
}
break;
default:
_mesa_problem(ctx, "Bad format (GL_DECAL) in apply_texture");
_mesa_problem(ctx, "Bad format (GL_DECAL) in texture_apply");
return;
}
break;
@@ -3256,7 +3299,7 @@ apply_texture( const GLcontext *ctx,
}
break;
default:
_mesa_problem(ctx, "Bad format (GL_BLEND) in apply_texture");
_mesa_problem(ctx, "Bad format (GL_BLEND) in texture_apply");
return;
}
break;
@@ -3333,63 +3376,57 @@ apply_texture( const GLcontext *ctx,
}
break;
default:
_mesa_problem(ctx, "Bad format (GL_ADD) in apply_texture");
_mesa_problem(ctx, "Bad format (GL_ADD) in texture_apply");
return;
}
break;
case GL_COMBINE_EXT:
texture_combine(ctx, texUnit, n, primary_rgba, texel, rgba);
break;
default:
_mesa_problem(ctx, "Bad env mode in apply_texture");
_mesa_problem(ctx, "Bad env mode in texture_apply");
return;
}
}
/*
* Apply a unit of texture mapping to the incoming fragments.
/**
* Apply texture mapping to a span of fragments.
*/
void
_swrast_texture_fragments( GLcontext *ctx, GLuint texUnit,
struct sw_span *span,
CONST GLchan primary_rgba[][4])
_swrast_texture_span( GLcontext *ctx, struct sw_span *span )
{
const GLuint mask = TEXTURE0_ANY << (texUnit * 4);
GLfloat (*texcoords)[4] = span->texcoords[texUnit];
GLfloat *lambda = span->lambda[texUnit];
if (ctx->Texture._ReallyEnabled & mask) {
const struct gl_texture_unit *textureUnit = &ctx->Texture.Unit[texUnit];
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLchan primary_rgba[MAX_WIDTH][4];
GLuint unit;
ASSERT(span->end < MAX_WIDTH);
ASSERT(span->arrayMask & SPAN_TEXTURE);
if (textureUnit->_Current) { /* XXX need this? */
const struct gl_texture_object *curObj = textureUnit->_Current;
GLchan texel[MAX_WIDTH][4];
/*
* Save copy of the incoming fragment colors (the GL_PRIMARY_COLOR)
*/
if (swrast->_AnyTextureCombine)
MEMCPY(primary_rgba, span->color.rgba, 4 * span->end * sizeof(GLchan));
/*
* Must do all texture sampling before combining in order to
* accomodate GL_ARB_texture_env_crossbar.
*/
for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
if (ctx->Texture.Unit[unit]._ReallyEnabled) {
const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
const struct gl_texture_object *curObj = texUnit->_Current;
GLfloat *lambda = span->lambda[unit];
GLchan (*texels)[4] = (GLchan (*)[4])
(swrast->TexelBuffer + unit * (span->end * 4 * sizeof(GLchan)));
/* adjust texture lod (lambda) */
if (span->arrayMask | SPAN_LAMBDA) {
#if 0
float min, max;
int i;
min = max = lambda[0];
for (i = 1; i < span->end; i++) {
if (lambda[i] > max)
max = lambda[i];
if (lambda[i] < min)
min = lambda[i];
}
printf("min/max %g / %g\n", min, max);
#endif
if (textureUnit->LodBias != 0.0F) {
if (texUnit->LodBias != 0.0F) {
/* apply LOD bias, but don't clamp yet */
GLuint i;
for (i=0;i<span->end;i++) {
lambda[i] += textureUnit->LodBias;
for (i = 0; i < span->end; i++) {
lambda[i] += texUnit->LodBias;
}
}
@@ -3398,60 +3435,50 @@ _swrast_texture_fragments( GLcontext *ctx, GLuint texUnit,
const GLfloat min = curObj->MinLod;
const GLfloat max = curObj->MaxLod;
GLuint i;
for (i=0;i<span->end;i++) {
for (i = 0; i < span->end; i++) {
GLfloat l = lambda[i];
lambda[i] = CLAMP(l, min, max);
}
}
}
/* Sample the texture for n fragments */
SWRAST_CONTEXT(ctx)->TextureSample[texUnit]( ctx, texUnit,
textureUnit->_Current,
span->end, texcoords,
lambda, texel );
apply_texture( ctx, textureUnit, span->end, primary_rgba,
(const GLchan (*)[4]) texel, span->color.rgba );
/* Sample the texture (span->end fragments) */
swrast->TextureSample[unit]( ctx, unit, texUnit->_Current,
span->end, span->texcoords[unit],
lambda, texels );
}
}
}
/*
* Apply multiple texture stages (or just unit 0) to the span.
* At some point in the future we'll probably modify this so that
* texels from any texture unit are available in any combiner unit.
* That'll require doing all the texture sampling first, and then
* all the application (blending) afterward.
/*
* OK, now apply the texture (aka texture combine/blend).
* We modify the span->color.rgba values.
*/
void
_swrast_multitexture_fragments( GLcontext *ctx, struct sw_span *span )
{
if (ctx->Texture._ReallyEnabled & ~TEXTURE0_ANY) {
/* multitexture */
GLchan primary_rgba[MAX_WIDTH][4];
GLuint unit;
ASSERT(span->end < MAX_WIDTH);
ASSERT(span->arrayMask & SPAN_TEXTURE);
/* save copy of the span colors (the GL_PRIMARY_COLOR) */
MEMCPY(primary_rgba, span->color.rgba, 4 * span->end * sizeof(GLchan));
/* loop over texture units, modifying the span->color.rgba values */
for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
if (ctx->Texture.Unit[unit]._ReallyEnabled) {
_swrast_texture_fragments( ctx, unit, span,
(CONST GLchan (*)[4]) primary_rgba);
}
const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
if (texUnit->EnvMode == GL_COMBINE_EXT) {
/* GL_ARB/EXT_texture_env_combine */
texture_combine( ctx, unit, span->end,
(CONST GLchan (*)[4]) primary_rgba,
swrast->TexelBuffer,
span->color.rgba );
}
else if (texUnit->EnvMode == GL_COMBINE4_NV) {
/* GL_NV_texture_env_combine4 */
texture_combine4( ctx, unit, span->end,
(CONST GLchan (*)[4]) primary_rgba,
swrast->TexelBuffer,
span->color.rgba );
}
else {
/* Just unit 0 enabled */
ASSERT(ctx->Texture._ReallyEnabled & TEXTURE0_ANY);
_swrast_texture_fragments( ctx, 0, span,
(CONST GLchan (*)[4]) span->color.rgba);
/* conventional texture blend */
const GLchan (*texels)[4] = (const GLchan (*)[4])
(swrast->TexelBuffer + unit *
(span->end * 4 * sizeof(GLchan)));
texture_apply( ctx, texUnit, span->end,
(CONST GLchan (*)[4]) primary_rgba, texels,
span->color.rgba );
}
}
}
}

10
src/mesa/swrast/s_texture.h
View File

@@ -1,4 +1,4 @@
/* $Id: s_texture.h,v 1.12 2002/04/12 15:39:59 brianp Exp $ */
/* $Id: s_texture.h,v 1.13 2002/05/02 00:59:20 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -40,12 +40,6 @@ _swrast_choose_texture_sample_func( GLcontext *ctx,
extern void
_swrast_texture_fragments( GLcontext *ctx, GLuint texUnit,
struct sw_span *span,
CONST GLchan primary_rgba[][4]);
extern void
_swrast_multitexture_fragments( GLcontext *ctx, struct sw_span *span );
_swrast_texture_span( GLcontext *ctx, struct sw_span *span );
#endif