/*
* Mesa 3-D graphics library
- * Version: 6.5.2
+ * Version: 7.1
*
- * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ * 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"),
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
-/*
- * Regarding GL_NV_blend_square:
+
+/**
+ * \file swrast/s_blend.c
+ * \brief software blending.
+ * \author Brian Paul
*
- * 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.
+ * Only a few blend modes have been optimized (min, max, transparency, add)
+ * more optimized cases can easily be added if needed.
+ * Celestia uses glBlendFunc(GL_SRC_ALPHA, GL_ONE), for example.
*/
-#include "glheader.h"
-#include "context.h"
-#include "colormac.h"
-#include "macros.h"
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/macros.h"
#include "s_blend.h"
#include "s_context.h"
/**
- * Special case for glBlendFunc(GL_ZERO, GL_ONE)
+ * Integer divide by 255
+ * Declare "int divtemp" before using.
+ * This satisfies Glean and should be reasonably fast.
+ * Contributed by Nathan Hand.
+ */
+#define DIV255(X) (divtemp = (X), ((divtemp << 8) + divtemp + 256) >> 16)
+
+
+
+/**
+ * Special case for glBlendFunc(GL_ZERO, GL_ONE).
+ * No-op means the framebuffer values remain unchanged.
+ * Any chanType ok.
*/
static void _BLENDAPI
-blend_noop_ubyte(GLcontext *ctx, GLuint n, const GLubyte mask[],
- GLchan rgba[][4], CONST GLchan dest[][4], GLenum chanType)
+blend_noop(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
{
- GLuint i;
+ GLint bytes;
+
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;
- for (i = 0; i < n; i++) {
- if (mask[i]) {
- COPY_CHAN4( rgba[i], dest[i] );
- }
- }
+ /* just memcpy */
+ if (chanType == GL_UNSIGNED_BYTE)
+ bytes = 4 * n * sizeof(GLubyte);
+ else if (chanType == GL_UNSIGNED_SHORT)
+ bytes = 4 * n * sizeof(GLushort);
+ else
+ bytes = 4 * n * sizeof(GLfloat);
+
+ memcpy(src, dst, bytes);
}
/**
* Special case for glBlendFunc(GL_ONE, GL_ZERO)
+ * Any chanType ok.
*/
static void _BLENDAPI
-blend_replace(GLcontext *ctx, GLuint n, const GLubyte mask[],
- GLchan rgba[][4], CONST GLchan dest[][4], GLenum chanType)
+blend_replace(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
{
ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD);
ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD);
(void) ctx;
(void) n;
(void) mask;
- (void) rgba;
- (void) dest;
+ (void) src;
+ (void) dst;
}
/**
- * Common transparency blending mode.
+ * Common transparency blending mode:
+ * glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA).
*/
static void _BLENDAPI
-blend_transparency_ubyte(GLcontext *ctx, GLuint n, const GLubyte mask[],
- GLchan rgba[][4], CONST GLchan dest[][4],
- GLenum chanType)
+blend_transparency_ubyte(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
{
+ GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+ const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
GLuint i;
+
ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD);
ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD);
ASSERT(ctx->Color.BlendSrcRGB == GL_SRC_ALPHA);
ASSERT(ctx->Color.BlendSrcA == GL_SRC_ALPHA);
ASSERT(ctx->Color.BlendDstRGB == GL_ONE_MINUS_SRC_ALPHA);
ASSERT(ctx->Color.BlendDstA == GL_ONE_MINUS_SRC_ALPHA);
+ ASSERT(chanType == GL_UNSIGNED_BYTE);
+
(void) ctx;
- for (i=0;i<n;i++) {
+ for (i = 0; i < n; i++) {
if (mask[i]) {
- const GLchan t = rgba[i][ACOMP]; /* t in [0, CHAN_MAX] */
+ const GLint t = rgba[i][ACOMP]; /* t is in [0, 255] */
if (t == 0) {
/* 0% alpha */
- rgba[i][RCOMP] = dest[i][RCOMP];
- rgba[i][GCOMP] = dest[i][GCOMP];
- rgba[i][BCOMP] = dest[i][BCOMP];
- rgba[i][ACOMP] = dest[i][ACOMP];
+ COPY_4UBV(rgba[i], dest[i]);
}
- else if (t == CHAN_MAX) {
- /* 100% alpha, no-op */
- }
- else {
-#if 0
- /* This is pretty close, but Glean complains */
- const GLint s = CHAN_MAX - t;
- const GLint r = (rgba[i][RCOMP] * t + dest[i][RCOMP] * s + 1) >> 8;
- const GLint g = (rgba[i][GCOMP] * t + dest[i][GCOMP] * s + 1) >> 8;
- const GLint b = (rgba[i][BCOMP] * t + dest[i][BCOMP] * s + 1) >> 8;
- const GLint a = (rgba[i][ACOMP] * t + dest[i][ACOMP] * s + 1) >> 8;
-#elif 0
- /* This is slower but satisfies Glean */
- const GLint s = CHAN_MAX - t;
- const GLint r = (rgba[i][RCOMP] * t + dest[i][RCOMP] * s) / 255;
- const GLint g = (rgba[i][GCOMP] * t + dest[i][GCOMP] * s) / 255;
- const GLint b = (rgba[i][BCOMP] * t + dest[i][BCOMP] * s) / 255;
- const GLint a = (rgba[i][ACOMP] * t + dest[i][ACOMP] * s) / 255;
-#else
-#if CHAN_BITS == 8
- /* This satisfies Glean and should be reasonably fast */
- /* Contributed by Nathan Hand */
-#if 0
-#define DIV255(X) (((X) << 8) + (X) + 256) >> 16
-#else
- GLint temp;
-#define DIV255(X) (temp = (X), ((temp << 8) + temp + 256) >> 16)
-#endif
+ else if (t != 255) {
+ GLint divtemp;
const GLint r = DIV255((rgba[i][RCOMP] - dest[i][RCOMP]) * t) + dest[i][RCOMP];
const GLint g = DIV255((rgba[i][GCOMP] - dest[i][GCOMP]) * t) + dest[i][GCOMP];
const GLint b = DIV255((rgba[i][BCOMP] - dest[i][BCOMP]) * t) + dest[i][BCOMP];
const GLint a = DIV255((rgba[i][ACOMP] - dest[i][ACOMP]) * t) + dest[i][ACOMP];
+ ASSERT(r <= 255);
+ ASSERT(g <= 255);
+ ASSERT(b <= 255);
+ ASSERT(a <= 255);
+ rgba[i][RCOMP] = (GLubyte) r;
+ rgba[i][GCOMP] = (GLubyte) g;
+ rgba[i][BCOMP] = (GLubyte) b;
+ rgba[i][ACOMP] = (GLubyte) a;
+ }
+ }
+ }
+}
-#undef DIV255
-#elif CHAN_BITS == 16
- const GLfloat tt = (GLfloat) t / CHAN_MAXF;
- const GLint r = (GLint) ((rgba[i][RCOMP] - dest[i][RCOMP]) * tt + dest[i][RCOMP]);
- const GLint g = (GLint) ((rgba[i][GCOMP] - dest[i][GCOMP]) * tt + dest[i][GCOMP]);
- const GLint b = (GLint) ((rgba[i][BCOMP] - dest[i][BCOMP]) * tt + dest[i][BCOMP]);
- const GLint a = (GLint) ((rgba[i][ACOMP] - dest[i][ACOMP]) * tt + dest[i][ACOMP]);
-#else /* CHAN_BITS == 32 */
- const GLfloat tt = (GLfloat) t / CHAN_MAXF;
- const GLfloat r = (rgba[i][RCOMP] - dest[i][RCOMP]) * tt + dest[i][RCOMP];
- const GLfloat g = (rgba[i][GCOMP] - dest[i][GCOMP]) * tt + dest[i][GCOMP];
- const GLfloat b = (rgba[i][BCOMP] - dest[i][BCOMP]) * tt + dest[i][BCOMP];
- const GLfloat a = CLAMP( rgba[i][ACOMP], 0.0F, CHAN_MAXF ) * t +
- CLAMP( dest[i][ACOMP], 0.0F, CHAN_MAXF ) * (1.0F - t);
-#endif
-#endif
- ASSERT(r <= CHAN_MAX);
- ASSERT(g <= CHAN_MAX);
- ASSERT(b <= CHAN_MAX);
- ASSERT(a <= CHAN_MAX);
- rgba[i][RCOMP] = (GLchan) r;
- rgba[i][GCOMP] = (GLchan) g;
- rgba[i][BCOMP] = (GLchan) b;
- rgba[i][ACOMP] = (GLchan) a;
+
+static void _BLENDAPI
+blend_transparency_ushort(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+ GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+ const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+ GLuint i;
+
+ ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendSrcRGB == GL_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendSrcA == GL_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendDstRGB == GL_ONE_MINUS_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendDstA == GL_ONE_MINUS_SRC_ALPHA);
+ ASSERT(chanType == GL_UNSIGNED_SHORT);
+
+ (void) ctx;
+
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ const GLint t = rgba[i][ACOMP];
+ if (t == 0) {
+ /* 0% alpha */
+ COPY_4V(rgba[i], dest[i]);
+ }
+ else if (t != 65535) {
+ const GLfloat tt = (GLfloat) t / 65535.0F;
+ GLushort r = (GLushort) ((rgba[i][RCOMP] - dest[i][RCOMP]) * tt + dest[i][RCOMP]);
+ GLushort g = (GLushort) ((rgba[i][GCOMP] - dest[i][GCOMP]) * tt + dest[i][GCOMP]);
+ GLushort b = (GLushort) ((rgba[i][BCOMP] - dest[i][BCOMP]) * tt + dest[i][BCOMP]);
+ GLushort a = (GLushort) ((rgba[i][ACOMP] - dest[i][ACOMP]) * tt + dest[i][ACOMP]);
+ ASSIGN_4V(rgba[i], r, g, b, a);
+ }
+ }
+ }
+}
+
+
+static void _BLENDAPI
+blend_transparency_float(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+ const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+ GLuint i;
+
+ ASSERT(ctx->Color.BlendEquationRGB == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendEquationA == GL_FUNC_ADD);
+ ASSERT(ctx->Color.BlendSrcRGB == GL_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendSrcA == GL_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendDstRGB == GL_ONE_MINUS_SRC_ALPHA);
+ ASSERT(ctx->Color.BlendDstA == GL_ONE_MINUS_SRC_ALPHA);
+ ASSERT(chanType == GL_FLOAT);
+
+ (void) ctx;
+
+ for (i = 0; i < n; i++) {
+ if (mask[i]) {
+ const GLfloat t = rgba[i][ACOMP]; /* t in [0, 1] */
+ if (t == 0.0F) {
+ /* 0% alpha */
+ COPY_4V(rgba[i], dest[i]);
+ }
+ else if (t != 1.0F) {
+ GLfloat r = (rgba[i][RCOMP] - dest[i][RCOMP]) * t + dest[i][RCOMP];
+ GLfloat g = (rgba[i][GCOMP] - dest[i][GCOMP]) * t + dest[i][GCOMP];
+ GLfloat b = (rgba[i][BCOMP] - dest[i][BCOMP]) * t + dest[i][BCOMP];
+ GLfloat a = (rgba[i][ACOMP] - dest[i][ACOMP]) * t + dest[i][ACOMP];
+ ASSIGN_4V(rgba[i], r, g, b, a);
}
}
}
/**
- * Add src and dest.
+ * Add src and dest: glBlendFunc(GL_ONE, GL_ONE).
+ * Any chanType ok.
*/
static void _BLENDAPI
-blend_add_ubyte(GLcontext *ctx, GLuint n, const GLubyte mask[],
- GLchan rgba[][4], CONST GLchan dest[][4], GLenum chanType)
+blend_add(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
{
GLuint i;
+
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;
- for (i=0;i<n;i++) {
- if (mask[i]) {
-#if CHAN_TYPE == GL_FLOAT
- /* don't RGB clamp to max */
- GLfloat a = CLAMP(rgba[i][ACOMP], 0.0F, CHAN_MAXF) + dest[i][ACOMP];
- rgba[i][RCOMP] += dest[i][RCOMP];
- rgba[i][GCOMP] += dest[i][GCOMP];
- rgba[i][BCOMP] += dest[i][BCOMP];
- rgba[i][ACOMP] = (GLchan) MIN2( a, CHAN_MAXF );
-#else
- GLint r = rgba[i][RCOMP] + dest[i][RCOMP];
- GLint g = rgba[i][GCOMP] + dest[i][GCOMP];
- GLint b = rgba[i][BCOMP] + dest[i][BCOMP];
- GLint a = rgba[i][ACOMP] + dest[i][ACOMP];
- rgba[i][RCOMP] = (GLchan) MIN2( r, CHAN_MAX );
- rgba[i][GCOMP] = (GLchan) MIN2( g, CHAN_MAX );
- rgba[i][BCOMP] = (GLchan) MIN2( b, CHAN_MAX );
- rgba[i][ACOMP] = (GLchan) MIN2( a, CHAN_MAX );
-#endif
+ if (chanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+ const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLint r = rgba[i][RCOMP] + dest[i][RCOMP];
+ GLint g = rgba[i][GCOMP] + dest[i][GCOMP];
+ GLint b = rgba[i][BCOMP] + dest[i][BCOMP];
+ GLint a = rgba[i][ACOMP] + dest[i][ACOMP];
+ rgba[i][RCOMP] = (GLubyte) MIN2( r, 255 );
+ rgba[i][GCOMP] = (GLubyte) MIN2( g, 255 );
+ rgba[i][BCOMP] = (GLubyte) MIN2( b, 255 );
+ rgba[i][ACOMP] = (GLubyte) MIN2( a, 255 );
+ }
+ }
+ }
+ else if (chanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+ const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLint r = rgba[i][RCOMP] + dest[i][RCOMP];
+ GLint g = rgba[i][GCOMP] + dest[i][GCOMP];
+ GLint b = rgba[i][BCOMP] + dest[i][BCOMP];
+ GLint a = rgba[i][ACOMP] + dest[i][ACOMP];
+ rgba[i][RCOMP] = (GLshort) MIN2( r, 255 );
+ rgba[i][GCOMP] = (GLshort) MIN2( g, 255 );
+ rgba[i][BCOMP] = (GLshort) MIN2( b, 255 );
+ rgba[i][ACOMP] = (GLshort) MIN2( a, 255 );
+ }
+ }
+ }
+ else {
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+ const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+ ASSERT(chanType == GL_FLOAT);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ /* don't RGB clamp to max */
+ rgba[i][RCOMP] += dest[i][RCOMP];
+ rgba[i][GCOMP] += dest[i][GCOMP];
+ rgba[i][BCOMP] += dest[i][BCOMP];
+ rgba[i][ACOMP] += dest[i][ACOMP];
+ }
}
}
}
/**
- * Blend min function (for GL_EXT_blend_minmax)
+ * Blend min function.
+ * Any chanType ok.
*/
static void _BLENDAPI
-blend_min_ubyte(GLcontext *ctx, GLuint n, const GLubyte mask[],
- GLchan rgba[][4], CONST GLchan dest[][4], GLenum chanType)
+blend_min(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
{
GLuint i;
ASSERT(ctx->Color.BlendEquationRGB == GL_MIN);
ASSERT(ctx->Color.BlendEquationA == GL_MIN);
(void) ctx;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- rgba[i][RCOMP] = (GLchan) MIN2( rgba[i][RCOMP], dest[i][RCOMP] );
- rgba[i][GCOMP] = (GLchan) MIN2( rgba[i][GCOMP], dest[i][GCOMP] );
- rgba[i][BCOMP] = (GLchan) MIN2( rgba[i][BCOMP], dest[i][BCOMP] );
-#if CHAN_TYPE == GL_FLOAT
- rgba[i][ACOMP] = (GLchan) MIN2(CLAMP(rgba[i][ACOMP], 0.0F, CHAN_MAXF),
- dest[i][ACOMP]);
-#else
- rgba[i][ACOMP] = (GLchan) MIN2( rgba[i][ACOMP], dest[i][ACOMP] );
-#endif
+ if (chanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+ const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
+ }
+ }
+ else if (chanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+ const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
+ }
+ }
+ else {
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+ const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+ ASSERT(chanType == GL_FLOAT);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
}
}
}
-
/**
- * Blend max function (for GL_EXT_blend_minmax)
+ * Blend max function.
+ * Any chanType ok.
*/
static void _BLENDAPI
-blend_max_ubyte(GLcontext *ctx, GLuint n, const GLubyte mask[],
- GLchan rgba[][4], CONST GLchan dest[][4], GLenum chanType)
+blend_max(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
{
GLuint i;
ASSERT(ctx->Color.BlendEquationRGB == GL_MAX);
ASSERT(ctx->Color.BlendEquationA == GL_MAX);
(void) ctx;
- for (i=0;i<n;i++) {
- if (mask[i]) {
- rgba[i][RCOMP] = (GLchan) MAX2( rgba[i][RCOMP], dest[i][RCOMP] );
- rgba[i][GCOMP] = (GLchan) MAX2( rgba[i][GCOMP], dest[i][GCOMP] );
- rgba[i][BCOMP] = (GLchan) MAX2( rgba[i][BCOMP], dest[i][BCOMP] );
-#if CHAN_TYPE == GL_FLOAT
- rgba[i][ACOMP] = (GLchan) MAX2(CLAMP(rgba[i][ACOMP], 0.0F, CHAN_MAXF),
- dest[i][ACOMP]);
-#else
- rgba[i][ACOMP] = (GLchan) MAX2( rgba[i][ACOMP], dest[i][ACOMP] );
-#endif
+ if (chanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+ const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
+ }
+ }
+ else if (chanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+ const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
+ }
+ }
+ else {
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+ const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+ ASSERT(chanType == GL_FLOAT);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );
+ rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );
+ rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );
+ rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );
+ }
}
}
}
/**
* Modulate: result = src * dest
+ * Any chanType ok.
*/
static void _BLENDAPI
-blend_modulate_ubyte(GLcontext *ctx, GLuint n, const GLubyte mask[],
- GLchan rgba[][4], CONST GLchan dest[][4], GLenum chanType)
+blend_modulate(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst, GLenum chanType)
{
GLuint i;
(void) ctx;
- for (i=0;i<n;i++) {
- if (mask[i]) {
-#if CHAN_TYPE == GL_FLOAT
- rgba[i][RCOMP] = rgba[i][RCOMP] * dest[i][RCOMP];
- rgba[i][GCOMP] = rgba[i][GCOMP] * dest[i][GCOMP];
- rgba[i][BCOMP] = rgba[i][BCOMP] * dest[i][BCOMP];
- rgba[i][ACOMP] = rgba[i][ACOMP] * dest[i][ACOMP];
-#elif CHAN_TYPE == GL_UNSIGNED_SHORT
- GLint r = (rgba[i][RCOMP] * dest[i][RCOMP] + 65535) >> 16;
- GLint g = (rgba[i][GCOMP] * dest[i][GCOMP] + 65535) >> 16;
- GLint b = (rgba[i][BCOMP] * dest[i][BCOMP] + 65535) >> 16;
- GLint a = (rgba[i][ACOMP] * dest[i][ACOMP] + 65535) >> 16;
- rgba[i][RCOMP] = (GLchan) r;
- rgba[i][GCOMP] = (GLchan) g;
- rgba[i][BCOMP] = (GLchan) b;
- rgba[i][ACOMP] = (GLchan) a;
-#else
- GLint r = (rgba[i][RCOMP] * dest[i][RCOMP] + 255) >> 8;
- GLint g = (rgba[i][GCOMP] * dest[i][GCOMP] + 255) >> 8;
- GLint b = (rgba[i][BCOMP] * dest[i][BCOMP] + 255) >> 8;
- GLint a = (rgba[i][ACOMP] * dest[i][ACOMP] + 255) >> 8;
- rgba[i][RCOMP] = (GLchan) r;
- rgba[i][GCOMP] = (GLchan) g;
- rgba[i][BCOMP] = (GLchan) b;
- rgba[i][ACOMP] = (GLchan) a;
-#endif
+ if (chanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+ const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ GLint divtemp;
+ rgba[i][RCOMP] = DIV255(rgba[i][RCOMP] * dest[i][RCOMP]);
+ rgba[i][GCOMP] = DIV255(rgba[i][GCOMP] * dest[i][GCOMP]);
+ rgba[i][BCOMP] = DIV255(rgba[i][BCOMP] * dest[i][BCOMP]);
+ rgba[i][ACOMP] = DIV255(rgba[i][ACOMP] * dest[i][ACOMP]);
+ }
+ }
+ }
+ else if (chanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+ const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = (rgba[i][RCOMP] * dest[i][RCOMP] + 65535) >> 16;
+ rgba[i][GCOMP] = (rgba[i][GCOMP] * dest[i][GCOMP] + 65535) >> 16;
+ rgba[i][BCOMP] = (rgba[i][BCOMP] * dest[i][BCOMP] + 65535) >> 16;
+ rgba[i][ACOMP] = (rgba[i][ACOMP] * dest[i][ACOMP] + 65535) >> 16;
+ }
+ }
+ }
+ else {
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+ const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+ ASSERT(chanType == GL_FLOAT);
+ for (i=0;i<n;i++) {
+ if (mask[i]) {
+ rgba[i][RCOMP] = rgba[i][RCOMP] * dest[i][RCOMP];
+ rgba[i][GCOMP] = rgba[i][GCOMP] * dest[i][GCOMP];
+ rgba[i][BCOMP] = rgba[i][BCOMP] * dest[i][BCOMP];
+ rgba[i][ACOMP] = rgba[i][ACOMP] * dest[i][ACOMP];
+ }
}
}
}
-#if 0
/**
* Do any blending operation, using floating point.
* \param n number of pixels
* \param mask fragment writemask array
- * \param src array of incoming (and modified) pixels
- * \param dst array of pixels from the dest color buffer
+ * \param rgba array of incoming (and modified) pixels
+ * \param dest array of pixels from the dest color buffer
*/
static void
-blend_general_float(GLcontext *ctx, GLuint n, const GLubyte mask[],
- GLvoid *src, const GLvoid *dst, GLenum chanType)
+blend_general_float(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLfloat rgba[][4], GLfloat dest[][4],
+ GLenum chanType)
{
- GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
- const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
GLuint i;
for (i = 0; i < n; i++) {
case GL_ONE_MINUS_CONSTANT_ALPHA:
sR = sG = sB = 1.0F - ctx->Color.BlendColor[3];
break;
- case GL_SRC_COLOR: /* GL_NV_blend_square */
+ case GL_SRC_COLOR:
sR = Rs;
sG = Gs;
sB = Bs;
break;
- case GL_ONE_MINUS_SRC_COLOR: /* GL_NV_blend_square */
+ case GL_ONE_MINUS_SRC_COLOR:
sR = 1.0F - Rs;
sG = 1.0F - Gs;
sB = 1.0F - Bs;
case GL_ONE_MINUS_CONSTANT_ALPHA:
sA = 1.0F - ctx->Color.BlendColor[3];
break;
- case GL_SRC_COLOR: /* GL_NV_blend_square */
+ case GL_SRC_COLOR:
sA = As;
break;
- case GL_ONE_MINUS_SRC_COLOR: /* GL_NV_blend_square */
+ case GL_ONE_MINUS_SRC_COLOR:
sA = 1.0F - As;
break;
default:
case GL_ONE_MINUS_CONSTANT_ALPHA:
dR = dG = dB = 1.0F - ctx->Color.BlendColor[3];
break;
- case GL_DST_COLOR: /* GL_NV_blend_square */
+ case GL_DST_COLOR:
dR = Rd;
dG = Gd;
dB = Bd;
break;
- case GL_ONE_MINUS_DST_COLOR: /* GL_NV_blend_square */
+ case GL_ONE_MINUS_DST_COLOR:
dR = 1.0F - Rd;
dG = 1.0F - Gd;
dB = 1.0F - Bd;
case GL_ONE_MINUS_CONSTANT_ALPHA:
dA = 1.0F - ctx->Color.BlendColor[3];
break;
- case GL_DST_COLOR: /* GL_NV_blend_square */
+ case GL_DST_COLOR:
dA = Ad;
break;
- case GL_ONE_MINUS_DST_COLOR: /* GL_NV_blend_square */
+ case GL_ONE_MINUS_DST_COLOR:
dA = 1.0F - Ad;
break;
default:
rgba[i][RCOMP] = MAX2( r, 0.0F );
rgba[i][GCOMP] = MAX2( g, 0.0F );
rgba[i][BCOMP] = MAX2( b, 0.0F );
- rgba[i][ACOMP] = CLAMP( a, 0.0F, CHAN_MAXF );
+ rgba[i][ACOMP] = CLAMP( a, 0.0F, 1.0F );
#else
ASSIGN_4V(rgba[i], r, g, b, a);
#endif
}
}
}
-#endif
-#if 0 /* not ready yet */
+/**
+ * Do any blending operation, any chanType.
+ */
static void
-blend_general2(GLcontext *ctx, GLuint n, const GLubyte mask[],
- void *src, const void *dst, GLenum chanType)
+blend_general(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ void *src, const void *dst, GLenum chanType)
{
GLfloat rgbaF[MAX_WIDTH][4], destF[MAX_WIDTH][4];
}
}
else {
- blend_general_float(ctx, n, mask, (GLfloat (*)[4]) rgbaF,
- (const GLfloat (*)[4]) destF, chanType);
+ blend_general_float(ctx, n, mask, (GLfloat (*)[4]) src,
+ (GLfloat (*)[4]) dst, chanType);
}
}
-#endif
-
-
-static void _BLENDAPI
-blend_general(GLcontext *ctx, GLuint n, const GLubyte mask[],
- GLchan rgba[][4], CONST GLchan dest[][4],
- GLenum chanType)
-{
- const GLfloat rscale = 1.0F / CHAN_MAXF;
- const GLfloat gscale = 1.0F / CHAN_MAXF;
- const GLfloat bscale = 1.0F / CHAN_MAXF;
- const GLfloat ascale = 1.0F / CHAN_MAXF;
- GLuint i;
-
- for (i=0;i<n;i++) {
- if (mask[i]) {
-#if CHAN_TYPE == GL_FLOAT
- GLfloat Rs, Gs, Bs, As; /* Source colors */
- GLfloat Rd, Gd, Bd, Ad; /* Dest colors */
-#else
- GLint Rs, Gs, Bs, As; /* Source colors */
- GLint Rd, Gd, Bd, Ad; /* Dest colors */
-#endif
- GLfloat sR, sG, sB, sA; /* Source scaling */
- GLfloat dR, dG, dB, dA; /* Dest scaling */
- GLfloat r, g, b, a; /* result color */
-
- /* Incoming/source Color */
- Rs = rgba[i][RCOMP];
- Gs = rgba[i][GCOMP];
- Bs = rgba[i][BCOMP];
- As = rgba[i][ACOMP];
-#if CHAN_TYPE == GL_FLOAT
- /* clamp */
- Rs = MIN2(Rs, CHAN_MAXF);
- Gs = MIN2(Gs, CHAN_MAXF);
- Bs = MIN2(Bs, CHAN_MAXF);
- As = MIN2(As, CHAN_MAXF);
-#endif
-
- /* Frame buffer/dest color */
- Rd = dest[i][RCOMP];
- Gd = dest[i][GCOMP];
- Bd = dest[i][BCOMP];
- Ad = dest[i][ACOMP];
-#if CHAN_TYPE == GL_FLOAT
- /* clamp */
- Rd = MIN2(Rd, CHAN_MAXF);
- Gd = MIN2(Gd, CHAN_MAXF);
- Bd = MIN2(Bd, CHAN_MAXF);
- Ad = MIN2(Ad, CHAN_MAXF);
-#endif
-
- /* Source RGB factor */
- switch (ctx->Color.BlendSrcRGB) {
- case GL_ZERO:
- sR = sG = sB = 0.0F;
- break;
- case GL_ONE:
- sR = sG = sB = 1.0F;
- break;
- case GL_DST_COLOR:
- sR = (GLfloat) Rd * rscale;
- sG = (GLfloat) Gd * gscale;
- sB = (GLfloat) Bd * bscale;
- break;
- case GL_ONE_MINUS_DST_COLOR:
- sR = 1.0F - (GLfloat) Rd * rscale;
- sG = 1.0F - (GLfloat) Gd * gscale;
- sB = 1.0F - (GLfloat) Bd * bscale;
- break;
- case GL_SRC_ALPHA:
- sR = sG = sB = (GLfloat) As * ascale;
- break;
- case GL_ONE_MINUS_SRC_ALPHA:
- sR = sG = sB = 1.0F - (GLfloat) As * ascale;
- break;
- case GL_DST_ALPHA:
- sR = sG = sB = (GLfloat) Ad * ascale;
- break;
- case GL_ONE_MINUS_DST_ALPHA:
- sR = sG = sB = 1.0F - (GLfloat) Ad * ascale;
- break;
- case GL_SRC_ALPHA_SATURATE:
- if (As < CHAN_MAX - Ad) {
- sR = sG = sB = (GLfloat) As * ascale;
- }
- else {
- sR = sG = sB = 1.0F - (GLfloat) Ad * ascale;
- }
- break;
- case GL_CONSTANT_COLOR:
- sR = ctx->Color.BlendColor[0];
- sG = ctx->Color.BlendColor[1];
- sB = ctx->Color.BlendColor[2];
- break;
- case GL_ONE_MINUS_CONSTANT_COLOR:
- sR = 1.0F - ctx->Color.BlendColor[0];
- sG = 1.0F - ctx->Color.BlendColor[1];
- sB = 1.0F - ctx->Color.BlendColor[2];
- break;
- case GL_CONSTANT_ALPHA:
- sR = sG = sB = ctx->Color.BlendColor[3];
- break;
- case GL_ONE_MINUS_CONSTANT_ALPHA:
- sR = sG = sB = 1.0F - ctx->Color.BlendColor[3];
- break;
- case GL_SRC_COLOR: /* GL_NV_blend_square */
- sR = (GLfloat) Rs * rscale;
- sG = (GLfloat) Gs * gscale;
- sB = (GLfloat) Bs * bscale;
- break;
- case GL_ONE_MINUS_SRC_COLOR: /* GL_NV_blend_square */
- sR = 1.0F - (GLfloat) Rs * rscale;
- sG = 1.0F - (GLfloat) Gs * gscale;
- sB = 1.0F - (GLfloat) Bs * bscale;
- break;
- default:
- /* this should never happen */
- _mesa_problem(ctx, "Bad blend source RGB factor in blend_general");
- return;
- }
-
- /* Source Alpha factor */
- switch (ctx->Color.BlendSrcA) {
- case GL_ZERO:
- sA = 0.0F;
- break;
- case GL_ONE:
- sA = 1.0F;
- break;
- case GL_DST_COLOR:
- sA = (GLfloat) Ad * ascale;
- break;
- case GL_ONE_MINUS_DST_COLOR:
- sA = 1.0F - (GLfloat) Ad * ascale;
- break;
- case GL_SRC_ALPHA:
- sA = (GLfloat) As * ascale;
- break;
- case GL_ONE_MINUS_SRC_ALPHA:
- sA = 1.0F - (GLfloat) As * ascale;
- break;
- case GL_DST_ALPHA:
- sA = (GLfloat) Ad * ascale;
- break;
- case GL_ONE_MINUS_DST_ALPHA:
- sA = 1.0F - (GLfloat) Ad * ascale;
- break;
- case GL_SRC_ALPHA_SATURATE:
- sA = 1.0;
- break;
- case GL_CONSTANT_COLOR:
- sA = ctx->Color.BlendColor[3];
- break;
- case GL_ONE_MINUS_CONSTANT_COLOR:
- sA = 1.0F - ctx->Color.BlendColor[3];
- break;
- case GL_CONSTANT_ALPHA:
- sA = ctx->Color.BlendColor[3];
- break;
- case GL_ONE_MINUS_CONSTANT_ALPHA:
- sA = 1.0F - ctx->Color.BlendColor[3];
- break;
- case GL_SRC_COLOR: /* GL_NV_blend_square */
- sA = (GLfloat) As * ascale;
- break;
- case GL_ONE_MINUS_SRC_COLOR: /* GL_NV_blend_square */
- sA = 1.0F - (GLfloat) As * ascale;
- break;
- default:
- /* this should never happen */
- sA = 0.0F;
- _mesa_problem(ctx, "Bad blend source A factor in blend_general");
- return;
- }
- /* Dest RGB factor */
- switch (ctx->Color.BlendDstRGB) {
- case GL_ZERO:
- dR = dG = dB = 0.0F;
- break;
- case GL_ONE:
- dR = dG = dB = 1.0F;
- break;
- case GL_SRC_COLOR:
- dR = (GLfloat) Rs * rscale;
- dG = (GLfloat) Gs * gscale;
- dB = (GLfloat) Bs * bscale;
- break;
- case GL_ONE_MINUS_SRC_COLOR:
- dR = 1.0F - (GLfloat) Rs * rscale;
- dG = 1.0F - (GLfloat) Gs * gscale;
- dB = 1.0F - (GLfloat) Bs * bscale;
- break;
- case GL_SRC_ALPHA:
- dR = dG = dB = (GLfloat) As * ascale;
- break;
- case GL_ONE_MINUS_SRC_ALPHA:
- dR = dG = dB = 1.0F - (GLfloat) As * ascale;
- break;
- case GL_DST_ALPHA:
- dR = dG = dB = (GLfloat) Ad * ascale;
- break;
- case GL_ONE_MINUS_DST_ALPHA:
- dR = dG = dB = 1.0F - (GLfloat) Ad * ascale;
- break;
- case GL_CONSTANT_COLOR:
- dR = ctx->Color.BlendColor[0];
- dG = ctx->Color.BlendColor[1];
- dB = ctx->Color.BlendColor[2];
- break;
- case GL_ONE_MINUS_CONSTANT_COLOR:
- dR = 1.0F - ctx->Color.BlendColor[0];
- dG = 1.0F - ctx->Color.BlendColor[1];
- dB = 1.0F - ctx->Color.BlendColor[2];
- break;
- case GL_CONSTANT_ALPHA:
- dR = dG = dB = ctx->Color.BlendColor[3];
- break;
- case GL_ONE_MINUS_CONSTANT_ALPHA:
- dR = dG = dB = 1.0F - ctx->Color.BlendColor[3];
- break;
- case GL_DST_COLOR: /* GL_NV_blend_square */
- dR = (GLfloat) Rd * rscale;
- dG = (GLfloat) Gd * gscale;
- dB = (GLfloat) Bd * bscale;
- break;
- case GL_ONE_MINUS_DST_COLOR: /* GL_NV_blend_square */
- dR = 1.0F - (GLfloat) Rd * rscale;
- dG = 1.0F - (GLfloat) Gd * gscale;
- dB = 1.0F - (GLfloat) Bd * bscale;
- break;
- default:
- /* this should never happen */
- dR = dG = dB = 0.0F;
- _mesa_problem(ctx, "Bad blend dest RGB factor in blend_general");
- return;
- }
-
- /* Dest Alpha factor */
- switch (ctx->Color.BlendDstA) {
- case GL_ZERO:
- dA = 0.0F;
- break;
- case GL_ONE:
- dA = 1.0F;
- break;
- case GL_SRC_COLOR:
- dA = (GLfloat) As * ascale;
- break;
- case GL_ONE_MINUS_SRC_COLOR:
- dA = 1.0F - (GLfloat) As * ascale;
- break;
- case GL_SRC_ALPHA:
- dA = (GLfloat) As * ascale;
- break;
- case GL_ONE_MINUS_SRC_ALPHA:
- dA = 1.0F - (GLfloat) As * ascale;
- break;
- case GL_DST_ALPHA:
- dA = (GLfloat) Ad * ascale;
- break;
- case GL_ONE_MINUS_DST_ALPHA:
- dA = 1.0F - (GLfloat) Ad * ascale;
- break;
- case GL_CONSTANT_COLOR:
- dA = ctx->Color.BlendColor[3];
- break;
- case GL_ONE_MINUS_CONSTANT_COLOR:
- dA = 1.0F - ctx->Color.BlendColor[3];
- break;
- case GL_CONSTANT_ALPHA:
- dA = ctx->Color.BlendColor[3];
- break;
- case GL_ONE_MINUS_CONSTANT_ALPHA:
- dA = 1.0F - ctx->Color.BlendColor[3];
- break;
- case GL_DST_COLOR: /* GL_NV_blend_square */
- dA = (GLfloat) Ad * ascale;
- break;
- case GL_ONE_MINUS_DST_COLOR: /* GL_NV_blend_square */
- dA = 1.0F - (GLfloat) Ad * ascale;
- break;
- default:
- /* this should never happen */
- dA = 0.0F;
- _mesa_problem(ctx, "Bad blend dest A factor in blend_general");
- return;
- }
-
- /* Due to round-off problems we have to clamp against zero. */
- /* Optimization: we don't have to do this for all src & dst factors */
- if (dA < 0.0F) dA = 0.0F;
- if (dR < 0.0F) dR = 0.0F;
- if (dG < 0.0F) dG = 0.0F;
- if (dB < 0.0F) dB = 0.0F;
- if (sA < 0.0F) sA = 0.0F;
- if (sR < 0.0F) sR = 0.0F;
- if (sG < 0.0F) sG = 0.0F;
- if (sB < 0.0F) sB = 0.0F;
-
- ASSERT( sR <= 1.0 );
- ASSERT( sG <= 1.0 );
- ASSERT( sB <= 1.0 );
- ASSERT( sA <= 1.0 );
- ASSERT( dR <= 1.0 );
- ASSERT( dG <= 1.0 );
- ASSERT( dB <= 1.0 );
- ASSERT( dA <= 1.0 );
-
- /* compute blended color */
-#if CHAN_TYPE == GL_FLOAT
- switch (ctx->Color.BlendEquationRGB) {
- case GL_FUNC_ADD:
- r = Rs * sR + Rd * dR;
- g = Gs * sG + Gd * dG;
- b = Bs * sB + Bd * dB;
- a = As * sA + Ad * dA;
- break;
- case GL_FUNC_SUBTRACT:
- r = Rs * sR - Rd * dR;
- g = Gs * sG - Gd * dG;
- b = Bs * sB - Bd * dB;
- a = As * sA - Ad * dA;
- break;
- case GL_FUNC_REVERSE_SUBTRACT:
- r = Rd * dR - Rs * sR;
- g = Gd * dG - Gs * sG;
- b = Bd * dB - Bs * sB;
- a = Ad * dA - As * sA;
- break;
- case GL_MIN:
- r = MIN2( Rd, Rs );
- g = MIN2( Gd, Gs );
- b = MIN2( Bd, Bs );
- break;
- case GL_MAX:
- r = MAX2( Rd, Rs );
- g = MAX2( Gd, Gs );
- b = MAX2( Bd, Bs );
- break;
- default:
- /* should never get here */
- r = g = b = 0.0F; /* silence uninitialized var warning */
- _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
- return;
- }
-
- switch (ctx->Color.BlendEquationA) {
- case GL_FUNC_ADD:
- a = As * sA + Ad * dA;
- break;
- case GL_FUNC_SUBTRACT:
- a = As * sA - Ad * dA;
- break;
- case GL_FUNC_REVERSE_SUBTRACT:
- a = Ad * dA - As * sA;
- break;
- case GL_MIN:
- a = MIN2( Ad, As );
- break;
- case GL_MAX:
- a = MAX2( Ad, As );
- break;
- default:
- /* should never get here */
- a = 0.0F; /* silence uninitialized var warning */
- _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
- return;
- }
-
- /* final clamping */
- rgba[i][RCOMP] = MAX2( r, 0.0F );
- rgba[i][GCOMP] = MAX2( g, 0.0F );
- rgba[i][BCOMP] = MAX2( b, 0.0F );
- rgba[i][ACOMP] = CLAMP( a, 0.0F, CHAN_MAXF );
-#else
- switch (ctx->Color.BlendEquationRGB) {
- case GL_FUNC_ADD:
- r = Rs * sR + Rd * dR + 0.5F;
- g = Gs * sG + Gd * dG + 0.5F;
- b = Bs * sB + Bd * dB + 0.5F;
- break;
- case GL_FUNC_SUBTRACT:
- r = Rs * sR - Rd * dR + 0.5F;
- g = Gs * sG - Gd * dG + 0.5F;
- b = Bs * sB - Bd * dB + 0.5F;
- break;
- case 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;
- break;
- case GL_MIN:
- r = MIN2( Rd, Rs );
- g = MIN2( Gd, Gs );
- b = MIN2( Bd, Bs );
- break;
- case GL_MAX:
- r = MAX2( Rd, Rs );
- g = MAX2( Gd, Gs );
- b = MAX2( Bd, Bs );
- break;
- default:
- /* should never get here */
- r = g = b = 0.0F; /* silence uninitialized var warning */
- _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
- return;
- }
-
- switch (ctx->Color.BlendEquationA) {
- case GL_FUNC_ADD:
- a = As * sA + Ad * dA + 0.5F;
- break;
- case GL_FUNC_SUBTRACT:
- a = As * sA - Ad * dA + 0.5F;
- break;
- case GL_FUNC_REVERSE_SUBTRACT:
- a = Ad * dA - As * sA + 0.5F;
- break;
- case GL_MIN:
- a = MIN2( Ad, As );
- break;
- case GL_MAX:
- a = MAX2( Ad, As );
- break;
- default:
- /* should never get here */
- a = 0.0F; /* silence uninitialized var warning */
- _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
- return;
- }
-
- /* final clamping */
- rgba[i][RCOMP] = (GLchan) (GLint) CLAMP( r, 0.0F, CHAN_MAXF );
- rgba[i][GCOMP] = (GLchan) (GLint) CLAMP( g, 0.0F, CHAN_MAXF );
- rgba[i][BCOMP] = (GLchan) (GLint) CLAMP( b, 0.0F, CHAN_MAXF );
- rgba[i][ACOMP] = (GLchan) (GLint) CLAMP( a, 0.0F, CHAN_MAXF );
-#endif
- }
- }
-}
/**
* Analyze current blending parameters to pick fastest blending function.
* Result: the ctx->Color.BlendFunc pointer is updated.
*/
-void _swrast_choose_blend_func( GLcontext *ctx )
+void
+_swrast_choose_blend_func(struct gl_context *ctx, GLenum chanType)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
const GLenum eq = ctx->Color.BlendEquationRGB;
else if (eq == GL_MIN) {
/* Note: GL_MIN ignores the blending weight factors */
#if defined(USE_MMX_ASM)
- if ( cpu_has_mmx ) {
+ if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
swrast->BlendFunc = _mesa_mmx_blend_min;
}
else
#endif
- swrast->BlendFunc = blend_min_ubyte;
+ swrast->BlendFunc = blend_min;
}
else if (eq == GL_MAX) {
/* Note: GL_MAX ignores the blending weight factors */
#if defined(USE_MMX_ASM)
- if ( cpu_has_mmx ) {
+ if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
swrast->BlendFunc = _mesa_mmx_blend_max;
}
else
#endif
- swrast->BlendFunc = blend_max_ubyte;
+ swrast->BlendFunc = blend_max;
}
else if (srcRGB != srcA || dstRGB != dstA) {
swrast->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 ) {
+ if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
swrast->BlendFunc = _mesa_mmx_blend_transparency;
}
else
#endif
- swrast->BlendFunc = blend_transparency_ubyte;
+ {
+ if (chanType == GL_UNSIGNED_BYTE)
+ swrast->BlendFunc = blend_transparency_ubyte;
+ else if (chanType == GL_UNSIGNED_SHORT)
+ swrast->BlendFunc = blend_transparency_ushort;
+ else
+ swrast->BlendFunc = blend_transparency_float;
+ }
}
else if (eq == GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ONE) {
#if defined(USE_MMX_ASM)
- if ( cpu_has_mmx ) {
+ if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
swrast->BlendFunc = _mesa_mmx_blend_add;
}
else
#endif
- swrast->BlendFunc = blend_add_ubyte;
+ swrast->BlendFunc = blend_add;
}
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 ) {
+ if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
swrast->BlendFunc = _mesa_mmx_blend_modulate;
}
else
#endif
- swrast->BlendFunc = blend_modulate_ubyte;
+ swrast->BlendFunc = blend_modulate;
}
else if (eq == GL_FUNC_ADD && srcRGB == GL_ZERO && dstRGB == GL_ONE) {
- swrast->BlendFunc = blend_noop_ubyte;
+ swrast->BlendFunc = blend_noop;
}
else if (eq == GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ZERO) {
swrast->BlendFunc = blend_replace;
* pixel coordinates.
*/
void
-_swrast_blend_span(GLcontext *ctx, struct gl_renderbuffer *rb,
- struct sw_span *span)
+_swrast_blend_span(struct gl_context *ctx, struct gl_renderbuffer *rb, SWspan *span)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
void *rbPixels;
rbPixels = _swrast_get_dest_rgba(ctx, rb, span);
swrast->BlendFunc(ctx, span->end, span->array->mask,
- span->array->rgba, (const GLchan (*)[4]) rbPixels,
- span->array->ChanType);
+ span->array->rgba, rbPixels, span->array->ChanType);
}
projects / mesa.git / blobdiff