/*
* Mesa 3-D graphics library
- * Version: 5.1
+ * Version: 6.0
*
- * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2004 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"),
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
+/*
+ * Regarding GL_NV_blend_square:
+ *
+ * Portions of this software may use or implement intellectual
+ * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims
+ * any and all warranties with respect to such intellectual property,
+ * including any use thereof or modifications thereto.
+ */
#include "glheader.h"
GLchan rgba[][4], CONST GLchan dest[][4] )
{
GLuint i;
- ASSERT(ctx->Color.BlendEquation==GL_FUNC_ADD_EXT);
+ ASSERT(ctx->Color.BlendEquationRGB==GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA==GL_FUNC_ADD);
ASSERT(ctx->Color.BlendSrcRGB==GL_ZERO);
ASSERT(ctx->Color.BlendDstRGB==GL_ONE);
(void) ctx;
blend_replace( GLcontext *ctx, GLuint n, const GLubyte mask[],
GLchan rgba[][4], CONST GLchan dest[][4] )
{
- ASSERT(ctx->Color.BlendEquation==GL_FUNC_ADD_EXT);
+ ASSERT(ctx->Color.BlendEquationRGB==GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA==GL_FUNC_ADD);
ASSERT(ctx->Color.BlendSrcRGB==GL_ONE);
ASSERT(ctx->Color.BlendDstRGB==GL_ZERO);
(void) ctx;
GLchan rgba[][4], CONST GLchan dest[][4] )
{
GLuint i;
- ASSERT(ctx->Color.BlendEquation==GL_FUNC_ADD_EXT);
+ ASSERT(ctx->Color.BlendEquationRGB==GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA==GL_FUNC_ADD);
ASSERT(ctx->Color.BlendSrcRGB==GL_SRC_ALPHA);
ASSERT(ctx->Color.BlendDstRGB==GL_ONE_MINUS_SRC_ALPHA);
(void) ctx;
GLchan rgba[][4], CONST GLchan dest[][4] )
{
GLuint i;
- ASSERT(ctx->Color.BlendEquation==GL_FUNC_ADD_EXT);
+ ASSERT(ctx->Color.BlendEquationRGB==GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA==GL_FUNC_ADD);
ASSERT(ctx->Color.BlendSrcRGB==GL_ONE);
ASSERT(ctx->Color.BlendDstRGB==GL_ONE);
(void) ctx;
GLchan rgba[][4], CONST GLchan dest[][4] )
{
GLuint i;
- ASSERT(ctx->Color.BlendEquation==GL_MIN_EXT);
+ ASSERT(ctx->Color.BlendEquationRGB==GL_MIN);
+ ASSERT(ctx->Color.BlendEquationA==GL_MIN);
(void) ctx;
for (i=0;i<n;i++) {
GLchan rgba[][4], CONST GLchan dest[][4] )
{
GLuint i;
- ASSERT(ctx->Color.BlendEquation==GL_MAX_EXT);
+ ASSERT(ctx->Color.BlendEquationRGB==GL_MAX);
+ ASSERT(ctx->Color.BlendEquationA==GL_MAX);
(void) ctx;
for (i=0;i<n;i++) {
/* compute blended color */
#if CHAN_TYPE == GL_FLOAT
- if (ctx->Color.BlendEquation==GL_FUNC_ADD_EXT) {
+ if (ctx->Color.BlendEquationRGB==GL_FUNC_ADD) {
r = Rs * sR + Rd * dR;
g = Gs * sG + Gd * dG;
b = Bs * sB + Bd * dB;
a = As * sA + Ad * dA;
}
- else if (ctx->Color.BlendEquation==GL_FUNC_SUBTRACT_EXT) {
+ else if (ctx->Color.BlendEquationRGB==GL_FUNC_SUBTRACT) {
r = Rs * sR - Rd * dR;
g = Gs * sG - Gd * dG;
b = Bs * sB - Bd * dB;
a = As * sA - Ad * dA;
}
- else if (ctx->Color.BlendEquation==GL_FUNC_REVERSE_SUBTRACT_EXT) {
+ else if (ctx->Color.BlendEquationRGB==GL_FUNC_REVERSE_SUBTRACT) {
r = Rd * dR - Rs * sR;
g = Gd * dG - Gs * sG;
b = Bd * dB - Bs * sB;
a = Ad * dA - As * sA;
}
+ else if (ctx->Color.BlendEquationRGB==GL_MIN) {
+ r = MIN2( Rd, Rs );
+ g = MIN2( Gd, Gs );
+ b = MIN2( Bd, Bs );
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_MAX) {
+ r = MAX2( Rd, Rs );
+ g = MAX2( Gd, Gs );
+ b = MAX2( Bd, Bs );
+ }
else {
/* should never get here */
- r = g = b = a = 0.0F; /* silence uninitialized var warning */
+ r = g = b = 0.0F; /* silence uninitialized var warning */
+ _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+ }
+
+ if (ctx->Color.BlendEquationA==GL_FUNC_ADD) {
+ a = As * sA + Ad * dA;
+ }
+ else if (ctx->Color.BlendEquationA==GL_FUNC_SUBTRACT) {
+ a = As * sA - Ad * dA;
+ }
+ else if (ctx->Color.BlendEquationA==GL_FUNC_REVERSE_SUBTRACT) {
+ a = Ad * dA - As * sA;
+ }
+ else if (ctx->Color.BlendEquationA==GL_MIN) {
+ a = MIN2( Ad, As );
+ }
+ else if (ctx->Color.BlendEquationA==GL_MAX) {
+ a = MAX2( Ad, As );
+ }
+ else {
+ /* should never get here */
+ a = 0.0F; /* silence uninitialized var warning */
_mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
}
rgba[i][BCOMP] = MAX2( b, 0.0F );
rgba[i][ACOMP] = CLAMP( a, 0.0F, CHAN_MAXF );
#else
- if (ctx->Color.BlendEquation==GL_FUNC_ADD_EXT) {
+ if (ctx->Color.BlendEquationRGB==GL_FUNC_ADD) {
r = Rs * sR + Rd * dR + 0.5F;
g = Gs * sG + Gd * dG + 0.5F;
b = Bs * sB + Bd * dB + 0.5F;
- a = As * sA + Ad * dA + 0.5F;
}
- else if (ctx->Color.BlendEquation==GL_FUNC_SUBTRACT_EXT) {
+ else if (ctx->Color.BlendEquationRGB==GL_FUNC_SUBTRACT) {
r = Rs * sR - Rd * dR + 0.5F;
g = Gs * sG - Gd * dG + 0.5F;
b = Bs * sB - Bd * dB + 0.5F;
- a = As * sA - Ad * dA + 0.5F;
}
- else if (ctx->Color.BlendEquation==GL_FUNC_REVERSE_SUBTRACT_EXT) {
+ else if (ctx->Color.BlendEquationRGB==GL_FUNC_REVERSE_SUBTRACT) {
r = Rd * dR - Rs * sR + 0.5F;
g = Gd * dG - Gs * sG + 0.5F;
b = Bd * dB - Bs * sB + 0.5F;
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_MIN) {
+ r = MIN2( Rd, Rs );
+ g = MIN2( Gd, Gs );
+ b = MIN2( Bd, Bs );
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_MAX) {
+ r = MAX2( Rd, Rs );
+ g = MAX2( Gd, Gs );
+ b = MAX2( Bd, Bs );
+ }
+ else {
+ /* should never get here */
+ r = g = b = 0.0F; /* silence uninitialized var warning */
+ _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+ }
+
+ if (ctx->Color.BlendEquationA==GL_FUNC_ADD) {
+ a = As * sA + Ad * dA + 0.5F;
+ }
+ else if (ctx->Color.BlendEquationA==GL_FUNC_SUBTRACT) {
+ a = As * sA - Ad * dA + 0.5F;
+ }
+ else if (ctx->Color.BlendEquationA==GL_FUNC_REVERSE_SUBTRACT) {
a = Ad * dA - As * sA + 0.5F;
}
+ else if (ctx->Color.BlendEquationA==GL_MIN) {
+ a = MIN2( Ad, As );
+ }
+ else if (ctx->Color.BlendEquationA==GL_MAX) {
+ a = MAX2( Ad, As );
+ }
else {
/* should never get here */
- r = g = b = a = 0.0F; /* silence uninitialized var warning */
+ a = 0.0F; /* silence uninitialized var warning */
_mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
}
}
-
-
-
/*
* Analyze current blending parameters to pick fastest blending function.
* Result: the ctx->Color.BlendFunc pointer is updated.
*/
void _swrast_choose_blend_func( GLcontext *ctx )
{
- const GLenum eq = ctx->Color.BlendEquation;
+ const GLenum eq = ctx->Color.BlendEquationRGB;
const GLenum srcRGB = ctx->Color.BlendSrcRGB;
const GLenum dstRGB = ctx->Color.BlendDstRGB;
const GLenum srcA = ctx->Color.BlendSrcA;
const GLenum dstA = ctx->Color.BlendDstA;
- if (srcRGB != srcA || dstRGB != dstA) {
+ if (ctx->Color.BlendEquationRGB != ctx->Color.BlendEquationA) {
SWRAST_CONTEXT(ctx)->BlendFunc = blend_general;
}
- else if (eq==GL_FUNC_ADD_EXT && srcRGB==GL_SRC_ALPHA
- && dstRGB==GL_ONE_MINUS_SRC_ALPHA) {
+ else if (eq==GL_MIN) {
+ /* Note: GL_MIN ignores the blending weight factors */
#if defined(USE_MMX_ASM)
if ( cpu_has_mmx ) {
- SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_transparency;
+ SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_min;
}
else
#endif
- SWRAST_CONTEXT(ctx)->BlendFunc = blend_transparency;
+ SWRAST_CONTEXT(ctx)->BlendFunc = blend_min;
}
- else if (eq==GL_FUNC_ADD_EXT && srcRGB==GL_ONE && dstRGB==GL_ONE) {
+ else if (eq==GL_MAX) {
+ /* Note: GL_MAX ignores the blending weight factors */
#if defined(USE_MMX_ASM)
if ( cpu_has_mmx ) {
- SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_add;
+ SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_max;
}
else
#endif
- SWRAST_CONTEXT(ctx)->BlendFunc = blend_add;
+ SWRAST_CONTEXT(ctx)->BlendFunc = blend_max;
}
- else if (((eq==GL_FUNC_ADD_EXT || eq==GL_FUNC_REVERSE_SUBTRACT_EXT)
- && (srcRGB==GL_ZERO && dstRGB==GL_SRC_COLOR))
- ||
- ((eq==GL_FUNC_ADD_EXT || eq==GL_FUNC_SUBTRACT_EXT)
- && (srcRGB==GL_DST_COLOR && dstRGB==GL_ZERO))) {
+ else if (srcRGB != srcA || dstRGB != dstA) {
+ SWRAST_CONTEXT(ctx)->BlendFunc = blend_general;
+ }
+ else if (eq==GL_FUNC_ADD && srcRGB==GL_SRC_ALPHA
+ && dstRGB==GL_ONE_MINUS_SRC_ALPHA) {
#if defined(USE_MMX_ASM)
if ( cpu_has_mmx ) {
- SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_modulate;
+ SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_transparency;
}
else
#endif
- SWRAST_CONTEXT(ctx)->BlendFunc = blend_modulate;
+ SWRAST_CONTEXT(ctx)->BlendFunc = blend_transparency;
}
- else if (eq==GL_MIN_EXT) {
+ else if (eq==GL_FUNC_ADD && srcRGB==GL_ONE && dstRGB==GL_ONE) {
#if defined(USE_MMX_ASM)
if ( cpu_has_mmx ) {
- SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_min;
+ SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_add;
}
else
#endif
- SWRAST_CONTEXT(ctx)->BlendFunc = blend_min;
+ SWRAST_CONTEXT(ctx)->BlendFunc = blend_add;
}
- else if (eq==GL_MAX_EXT) {
+ else if (((eq==GL_FUNC_ADD || eq==GL_FUNC_REVERSE_SUBTRACT)
+ && (srcRGB==GL_ZERO && dstRGB==GL_SRC_COLOR))
+ ||
+ ((eq==GL_FUNC_ADD || eq==GL_FUNC_SUBTRACT)
+ && (srcRGB==GL_DST_COLOR && dstRGB==GL_ZERO))) {
#if defined(USE_MMX_ASM)
if ( cpu_has_mmx ) {
- SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_max;
+ SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_modulate;
}
else
#endif
- SWRAST_CONTEXT(ctx)->BlendFunc = blend_max;
+ SWRAST_CONTEXT(ctx)->BlendFunc = blend_modulate;
}
- else if (eq==GL_FUNC_ADD_EXT && srcRGB == GL_ZERO && dstRGB == GL_ONE) {
+ else if (eq==GL_FUNC_ADD && srcRGB == GL_ZERO && dstRGB == GL_ONE) {
SWRAST_CONTEXT(ctx)->BlendFunc = blend_noop;
}
- else if (eq==GL_FUNC_ADD_EXT && srcRGB == GL_ONE && dstRGB == GL_ZERO) {
+ else if (eq==GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ZERO) {
SWRAST_CONTEXT(ctx)->BlendFunc = blend_replace;
}
else {