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Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.c')
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.c224
1 files changed, 0 insertions, 224 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.c
deleted file mode 100644
index 55c1e6a58..000000000
--- a/nx-X11/extras/Mesa/src/mesa/swrast/s_alpha.c
+++ /dev/null
@@ -1,224 +0,0 @@
-
-/*
- * Mesa 3-D graphics library
- * Version: 4.1
- *
- * Copyright (C) 1999-2002 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 "glheader.h"
-#include "context.h"
-#include "colormac.h"
-#include "macros.h"
-
-#include "s_alpha.h"
-#include "s_context.h"
-
-
-/**
- * \fn GLint _swrast_alpha_test( const GLcontext *ctx, struct sw_span *span )
- * \brief Apply the alpha test to a span of pixels.
- * \return
- * - "0" = all pixels in the span failed the alpha test.
- * - "1" = one or more pixels passed the alpha test.
- */
-GLint
-_swrast_alpha_test( const GLcontext *ctx, struct sw_span *span )
-{
- const GLchan (*rgba)[4] = (const GLchan (*)[4]) span->array->rgba;
- GLchan ref;
- const GLuint n = span->end;
- GLubyte *mask = span->array->mask;
- GLuint i;
-
- CLAMPED_FLOAT_TO_CHAN(ref, ctx->Color.AlphaRef);
-
- if (span->arrayMask & SPAN_RGBA) {
- /* Use the array values */
- switch (ctx->Color.AlphaFunc) {
- case GL_LESS:
- for (i = 0; i < n; i++)
- mask[i] &= (rgba[i][ACOMP] < ref);
- break;
- case GL_LEQUAL:
- for (i = 0; i < n; i++)
- mask[i] &= (rgba[i][ACOMP] <= ref);
- break;
- case GL_GEQUAL:
- for (i = 0; i < n; i++)
- mask[i] &= (rgba[i][ACOMP] >= ref);
- break;
- case GL_GREATER:
- for (i = 0; i < n; i++)
- mask[i] &= (rgba[i][ACOMP] > ref);
- break;
- case GL_NOTEQUAL:
- for (i = 0; i < n; i++)
- mask[i] &= (rgba[i][ACOMP] != ref);
- break;
- case GL_EQUAL:
- for (i = 0; i < n; i++)
- mask[i] &= (rgba[i][ACOMP] == ref);
- break;
- case GL_ALWAYS:
- /* do nothing */
- return 1;
- case GL_NEVER:
- /* caller should check for zero! */
- span->writeAll = GL_FALSE;
- return 0;
- default:
- _mesa_problem( ctx, "Invalid alpha test in _swrast_alpha_test" );
- return 0;
- }
- }
- else {
- /* Use the interpolation values */
-#if CHAN_TYPE == GL_FLOAT
- const GLfloat alphaStep = span->alphaStep;
- GLfloat alpha = span->alpha;
- ASSERT(span->interpMask & SPAN_RGBA);
- switch (ctx->Color.AlphaFunc) {
- case GL_LESS:
- for (i = 0; i < n; i++) {
- mask[i] &= (alpha < ref);
- alpha += alphaStep;
- }
- break;
- case GL_LEQUAL:
- for (i = 0; i < n; i++) {
- mask[i] &= (alpha <= ref);
- alpha += alphaStep;
- }
- break;
- case GL_GEQUAL:
- for (i = 0; i < n; i++) {
- mask[i] &= (alpha >= ref);
- alpha += alphaStep;
- }
- break;
- case GL_GREATER:
- for (i = 0; i < n; i++) {
- mask[i] &= (alpha > ref);
- alpha += alphaStep;
- }
- break;
- case GL_NOTEQUAL:
- for (i = 0; i < n; i++) {
- mask[i] &= (alpha != ref);
- alpha += alphaStep;
- }
- break;
- case GL_EQUAL:
- for (i = 0; i < n; i++) {
- mask[i] &= (alpha == ref);
- alpha += alphaStep;
- }
- break;
- case GL_ALWAYS:
- /* do nothing */
- return 1;
- case GL_NEVER:
- /* caller should check for zero! */
- span->writeAll = GL_FALSE;
- return 0;
- default:
- _mesa_problem( ctx, "Invalid alpha test in gl_alpha_test" );
- return 0;
- }
-#else
- /* 8 or 16-bit channel interpolation */
- const GLfixed alphaStep = span->alphaStep;
- GLfixed alpha = span->alpha;
- ASSERT(span->interpMask & SPAN_RGBA);
- switch (ctx->Color.AlphaFunc) {
- case GL_LESS:
- for (i = 0; i < n; i++) {
- mask[i] &= (FixedToChan(alpha) < ref);
- alpha += alphaStep;
- }
- break;
- case GL_LEQUAL:
- for (i = 0; i < n; i++) {
- mask[i] &= (FixedToChan(alpha) <= ref);
- alpha += alphaStep;
- }
- break;
- case GL_GEQUAL:
- for (i = 0; i < n; i++) {
- mask[i] &= (FixedToChan(alpha) >= ref);
- alpha += alphaStep;
- }
- break;
- case GL_GREATER:
- for (i = 0; i < n; i++) {
- mask[i] &= (FixedToChan(alpha) > ref);
- alpha += alphaStep;
- }
- break;
- case GL_NOTEQUAL:
- for (i = 0; i < n; i++) {
- mask[i] &= (FixedToChan(alpha) != ref);
- alpha += alphaStep;
- }
- break;
- case GL_EQUAL:
- for (i = 0; i < n; i++) {
- mask[i] &= (FixedToChan(alpha) == ref);
- alpha += alphaStep;
- }
- break;
- case GL_ALWAYS:
- /* do nothing */
- return 1;
- case GL_NEVER:
- /* caller should check for zero! */
- span->writeAll = GL_FALSE;
- return 0;
- default:
- _mesa_problem( ctx, "Invalid alpha test in gl_alpha_test" );
- return 0;
- }
-#endif /* CHAN_TYPE */
- }
-
-#if 0
- /* XXXX This causes conformance failures!!!! */
- while ((span->start <= span->end) &&
- (mask[span->start] == 0))
- span->start ++;
-
- while ((span->end >= span->start) &&
- (mask[span->end] == 0))
- span->end --;
-#endif
-
- span->writeAll = GL_FALSE;
-
- if (span->start >= span->end)
- return 0;
- else
- return 1;
-}
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