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-rw-r--r--mesalib/src/mesa/swrast/s_alpha.c320
1 files changed, 160 insertions, 160 deletions
diff --git a/mesalib/src/mesa/swrast/s_alpha.c b/mesalib/src/mesa/swrast/s_alpha.c
index 509477433..798b506e4 100644
--- a/mesalib/src/mesa/swrast/s_alpha.c
+++ b/mesalib/src/mesa/swrast/s_alpha.c
@@ -1,160 +1,160 @@
-/*
- * Mesa 3-D graphics library
- * Version: 6.5.2
- *
- * Copyright (C) 1999-2006 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 swrast/s_alpha.c
- * \brief Functions to apply alpha test.
- */
-
-#include "main/glheader.h"
-#include "main/context.h"
-#include "main/colormac.h"
-#include "main/macros.h"
-
-#include "s_alpha.h"
-#include "s_context.h"
-
-
-#define ALPHA_TEST(ALPHA, LOOP_CODE) \
-do { \
- switch (ctx->Color.AlphaFunc) { \
- case GL_LESS: \
- for (i = 0; i < n; i++) { \
- mask[i] &= (ALPHA < ref); \
- LOOP_CODE; \
- } \
- break; \
- case GL_LEQUAL: \
- for (i = 0; i < n; i++) { \
- mask[i] &= (ALPHA <= ref); \
- LOOP_CODE; \
- } \
- break; \
- case GL_GEQUAL: \
- for (i = 0; i < n; i++) { \
- mask[i] &= (ALPHA >= ref); \
- LOOP_CODE; \
- } \
- break; \
- case GL_GREATER: \
- for (i = 0; i < n; i++) { \
- mask[i] &= (ALPHA > ref); \
- LOOP_CODE; \
- } \
- break; \
- case GL_NOTEQUAL: \
- for (i = 0; i < n; i++) { \
- mask[i] &= (ALPHA != ref); \
- LOOP_CODE; \
- } \
- break; \
- case GL_EQUAL: \
- for (i = 0; i < n; i++) { \
- mask[i] &= (ALPHA == ref); \
- LOOP_CODE; \
- } \
- break; \
- default: \
- _mesa_problem(ctx, "Invalid alpha test in _swrast_alpha_test" ); \
- return 0; \
- } \
-} while (0)
-
-
-
-/**
- * Perform the alpha test for an array of pixels.
- * For pixels that fail the test, mask[i] will be set to 0.
- * \return 0 if all pixels in the span failed the alpha test,
- * 1 if one or more pixels passed the alpha test.
- */
-GLint
-_swrast_alpha_test(const GLcontext *ctx, SWspan *span)
-{
- const GLuint n = span->end;
- GLubyte *mask = span->array->mask;
- GLuint i;
-
- if (ctx->Color.AlphaFunc == GL_ALWAYS) {
- /* do nothing */
- return 1;
- }
- else if (ctx->Color.AlphaFunc == GL_NEVER) {
- /* All pixels failed - caller should check for this return value and
- * act accordingly.
- */
- span->writeAll = GL_FALSE;
- return 0;
- }
-
- if (span->arrayMask & SPAN_RGBA) {
- /* Use array's alpha values */
- if (span->array->ChanType == GL_UNSIGNED_BYTE) {
- GLubyte (*rgba)[4] = span->array->rgba8;
- GLubyte ref;
- CLAMPED_FLOAT_TO_UBYTE(ref, ctx->Color.AlphaRef);
- ALPHA_TEST(rgba[i][ACOMP], ;);
- }
- else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
- GLushort (*rgba)[4] = span->array->rgba16;
- GLushort ref;
- CLAMPED_FLOAT_TO_USHORT(ref, ctx->Color.AlphaRef);
- ALPHA_TEST(rgba[i][ACOMP], ;);
- }
- else {
- GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
- const GLfloat ref = ctx->Color.AlphaRef;
- ALPHA_TEST(rgba[i][ACOMP], ;);
- }
- }
- else {
- /* Interpolate alpha values */
- ASSERT(span->interpMask & SPAN_RGBA);
- if (span->array->ChanType == GL_UNSIGNED_BYTE) {
- const GLfixed alphaStep = span->alphaStep;
- GLfixed alpha = span->alpha;
- GLubyte ref;
- CLAMPED_FLOAT_TO_UBYTE(ref, ctx->Color.AlphaRef);
- ALPHA_TEST(FixedToInt(alpha), alpha += alphaStep);
- }
- else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
- const GLfixed alphaStep = span->alphaStep;
- GLfixed alpha = span->alpha;
- GLushort ref;
- CLAMPED_FLOAT_TO_USHORT(ref, ctx->Color.AlphaRef);
- ALPHA_TEST(FixedToInt(alpha), alpha += alphaStep);
- }
- else {
- const GLfloat alphaStep = FixedToFloat(span->alphaStep);
- GLfloat alpha = FixedToFloat(span->alpha);
- const GLfloat ref = ctx->Color.AlphaRef;
- ALPHA_TEST(alpha, alpha += alphaStep);
- }
- }
-
- span->writeAll = GL_FALSE;
-
- /* XXX examine mask[] values? */
- return 1;
-}
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 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 swrast/s_alpha.c
+ * \brief Functions to apply alpha test.
+ */
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+
+#include "s_alpha.h"
+#include "s_context.h"
+
+
+#define ALPHA_TEST(ALPHA, LOOP_CODE) \
+do { \
+ switch (ctx->Color.AlphaFunc) { \
+ case GL_LESS: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA < ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ case GL_LEQUAL: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA <= ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ case GL_GEQUAL: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA >= ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ case GL_GREATER: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA > ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ case GL_NOTEQUAL: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA != ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ case GL_EQUAL: \
+ for (i = 0; i < n; i++) { \
+ mask[i] &= (ALPHA == ref); \
+ LOOP_CODE; \
+ } \
+ break; \
+ default: \
+ _mesa_problem(ctx, "Invalid alpha test in _swrast_alpha_test" ); \
+ return 0; \
+ } \
+} while (0)
+
+
+
+/**
+ * Perform the alpha test for an array of pixels.
+ * For pixels that fail the test, mask[i] will be set to 0.
+ * \return 0 if all pixels in the span failed the alpha test,
+ * 1 if one or more pixels passed the alpha test.
+ */
+GLint
+_swrast_alpha_test(const struct gl_context *ctx, SWspan *span)
+{
+ const GLuint n = span->end;
+ GLubyte *mask = span->array->mask;
+ GLuint i;
+
+ if (ctx->Color.AlphaFunc == GL_ALWAYS) {
+ /* do nothing */
+ return 1;
+ }
+ else if (ctx->Color.AlphaFunc == GL_NEVER) {
+ /* All pixels failed - caller should check for this return value and
+ * act accordingly.
+ */
+ span->writeAll = GL_FALSE;
+ return 0;
+ }
+
+ if (span->arrayMask & SPAN_RGBA) {
+ /* Use array's alpha values */
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ GLubyte ref;
+ CLAMPED_FLOAT_TO_UBYTE(ref, ctx->Color.AlphaRef);
+ ALPHA_TEST(rgba[i][ACOMP], ;);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ GLushort ref;
+ CLAMPED_FLOAT_TO_USHORT(ref, ctx->Color.AlphaRef);
+ ALPHA_TEST(rgba[i][ACOMP], ;);
+ }
+ else {
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ const GLfloat ref = ctx->Color.AlphaRef;
+ ALPHA_TEST(rgba[i][ACOMP], ;);
+ }
+ }
+ else {
+ /* Interpolate alpha values */
+ ASSERT(span->interpMask & SPAN_RGBA);
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ const GLfixed alphaStep = span->alphaStep;
+ GLfixed alpha = span->alpha;
+ GLubyte ref;
+ CLAMPED_FLOAT_TO_UBYTE(ref, ctx->Color.AlphaRef);
+ ALPHA_TEST(FixedToInt(alpha), alpha += alphaStep);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ const GLfixed alphaStep = span->alphaStep;
+ GLfixed alpha = span->alpha;
+ GLushort ref;
+ CLAMPED_FLOAT_TO_USHORT(ref, ctx->Color.AlphaRef);
+ ALPHA_TEST(FixedToInt(alpha), alpha += alphaStep);
+ }
+ else {
+ const GLfloat alphaStep = FixedToFloat(span->alphaStep);
+ GLfloat alpha = FixedToFloat(span->alpha);
+ const GLfloat ref = ctx->Color.AlphaRef;
+ ALPHA_TEST(alpha, alpha += alphaStep);
+ }
+ }
+
+ span->writeAll = GL_FALSE;
+
+ /* XXX examine mask[] values? */
+ return 1;
+}
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