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Diffstat (limited to 'src/mesa/swrast/s_alphabuf.c')
-rw-r--r--src/mesa/swrast/s_alphabuf.c332
1 files changed, 0 insertions, 332 deletions
diff --git a/src/mesa/swrast/s_alphabuf.c b/src/mesa/swrast/s_alphabuf.c
deleted file mode 100644
index 5d8107c2d6..0000000000
--- a/src/mesa/swrast/s_alphabuf.c
+++ /dev/null
@@ -1,332 +0,0 @@
-/*
- * Mesa 3-D graphics library
- * Version: 6.1
- *
- * 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"),
- * 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.
- */
-
-
-/*
- * Software alpha planes. Many frame buffers don't have alpha bits so
- * we simulate them in software.
- */
-
-
-#include "glheader.h"
-#include "colormac.h"
-#include "context.h"
-#include "imports.h"
-
-#include "s_context.h"
-#include "s_alphabuf.h"
-
-
-/*
- * Allocate a new front and back alpha buffer.
- */
-void
-_swrast_alloc_alpha_buffers( GLframebuffer *buffer )
-{
- const GLint bytes = buffer->Width * buffer->Height * sizeof(GLchan);
-
- ASSERT(buffer->UseSoftwareAlphaBuffers);
-
- if (buffer->FrontLeftAlpha) {
- MESA_PBUFFER_FREE( buffer->FrontLeftAlpha );
- }
- buffer->FrontLeftAlpha = (GLchan *) MESA_PBUFFER_ALLOC( bytes );
- if (!buffer->FrontLeftAlpha) {
- /* out of memory */
- _mesa_error( NULL, GL_OUT_OF_MEMORY,
- "Couldn't allocate front-left alpha buffer" );
- }
-
- if (buffer->Visual.doubleBufferMode) {
- if (buffer->BackLeftAlpha) {
- MESA_PBUFFER_FREE( buffer->BackLeftAlpha );
- }
- buffer->BackLeftAlpha = (GLchan *) MESA_PBUFFER_ALLOC( bytes );
- if (!buffer->BackLeftAlpha) {
- /* out of memory */
- _mesa_error( NULL, GL_OUT_OF_MEMORY,
- "Couldn't allocate back-left alpha buffer" );
- }
- }
-
- if (buffer->Visual.stereoMode) {
- if (buffer->FrontRightAlpha) {
- MESA_PBUFFER_FREE( buffer->FrontRightAlpha );
- }
- buffer->FrontRightAlpha = (GLchan *) MESA_PBUFFER_ALLOC( bytes );
- if (!buffer->FrontRightAlpha) {
- /* out of memory */
- _mesa_error( NULL, GL_OUT_OF_MEMORY,
- "Couldn't allocate front-right alpha buffer" );
- }
-
- if (buffer->Visual.doubleBufferMode) {
- if (buffer->BackRightAlpha) {
- MESA_PBUFFER_FREE( buffer->BackRightAlpha );
- }
- buffer->BackRightAlpha = (GLchan *) MESA_PBUFFER_ALLOC( bytes );
- if (!buffer->BackRightAlpha) {
- /* out of memory */
- _mesa_error( NULL, GL_OUT_OF_MEMORY,
- "Couldn't allocate back-right alpha buffer" );
- }
- }
- }
-}
-
-
-/*
- * Clear all the alpha buffers
- */
-void
-_swrast_clear_alpha_buffers( GLcontext *ctx )
-{
- GLchan aclear;
- GLuint bufferBit;
-
- CLAMPED_FLOAT_TO_CHAN(aclear, ctx->Color.ClearColor[3]);
-
- ASSERT(ctx->DrawBuffer->UseSoftwareAlphaBuffers);
- ASSERT(ctx->Color.ColorMask[ACOMP]);
-
- /* loop over four possible alpha buffers */
- for (bufferBit = 1; bufferBit <= 8; bufferBit = bufferBit << 1) {
- if (bufferBit & ctx->Color._DrawDestMask[0]) {
- GLchan *buffer;
- if (bufferBit == DD_FRONT_LEFT_BIT) {
- buffer = ctx->DrawBuffer->FrontLeftAlpha;
- }
- else if (bufferBit == DD_FRONT_RIGHT_BIT) {
- buffer = ctx->DrawBuffer->FrontRightAlpha;
- }
- else if (bufferBit == DD_BACK_LEFT_BIT) {
- buffer = ctx->DrawBuffer->BackLeftAlpha;
- }
- else {
- buffer = ctx->DrawBuffer->BackRightAlpha;
- }
-
- if (ctx->Scissor.Enabled) {
- /* clear scissor region */
- GLint j;
- GLint rowLen = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
- GLint rows = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
- GLint width = ctx->DrawBuffer->Width;
- GLchan *aptr = buffer
- + ctx->DrawBuffer->_Ymin * ctx->DrawBuffer->Width
- + ctx->DrawBuffer->_Xmin;
- for (j = 0; j < rows; j++) {
-#if CHAN_BITS == 8
- MEMSET( aptr, aclear, rowLen );
-#elif CHAN_BITS == 16
- MEMSET16( aptr, aclear, rowLen );
-#else
- GLint i;
- for (i = 0; i < rowLen; i++) {
- aptr[i] = aclear;
- }
-#endif
- aptr += width;
- }
- }
- else {
- /* clear whole buffer */
- GLuint pixels = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height;
-#if CHAN_BITS == 8
- MEMSET(buffer, aclear, pixels);
-#elif CHAN_BITS == 16
- MEMSET16(buffer, aclear, pixels);
-#else
- GLuint i;
- for (i = 0; i < pixels; i++) {
- buffer[i] = aclear;
- }
-#endif
- }
- }
- }
-}
-
-
-
-static INLINE
-GLchan *get_alpha_buffer( GLcontext *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
- switch (swrast->CurrentBufferBit) {
- case DD_FRONT_LEFT_BIT:
- return ctx->DrawBuffer->FrontLeftAlpha;
- case DD_BACK_LEFT_BIT:
- return ctx->DrawBuffer->BackLeftAlpha;
- case DD_FRONT_RIGHT_BIT:
- return ctx->DrawBuffer->FrontRightAlpha;
- case DD_BACK_RIGHT_BIT:
- return ctx->DrawBuffer->BackRightAlpha;
- default:
- _mesa_problem(ctx, "Bad CurrentBuffer in get_alpha_buffer()");
- return (GLchan *) ctx->DrawBuffer->FrontLeftAlpha;
- }
-}
-
-
-void
-_swrast_write_alpha_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
- CONST GLchan rgba[][4], const GLubyte mask[] )
-{
- GLchan *buffer, *aptr;
- GLuint i;
-
- buffer = get_alpha_buffer(ctx);
- aptr = buffer + y * ctx->DrawBuffer->Width + x;
-
- if (mask) {
- for (i=0;i<n;i++) {
- if (mask[i]) {
- *aptr = rgba[i][ACOMP];
- }
- aptr++;
- }
- }
- else {
- for (i=0;i<n;i++) {
- *aptr++ = rgba[i][ACOMP];
- }
- }
-}
-
-
-void
-_swrast_write_mono_alpha_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
- GLchan alpha, const GLubyte mask[] )
-{
- GLchan *buffer, *aptr;
- GLuint i;
-
- buffer = get_alpha_buffer(ctx);
- aptr = buffer + y * ctx->DrawBuffer->Width + x;
-
- if (mask) {
- for (i=0;i<n;i++) {
- if (mask[i]) {
- *aptr = alpha;
- }
- aptr++;
- }
- }
- else {
- for (i=0;i<n;i++) {
- *aptr++ = alpha;
- }
- }
-}
-
-
-void
-_swrast_write_alpha_pixels( GLcontext *ctx,
- GLuint n, const GLint x[], const GLint y[],
- CONST GLchan rgba[][4], const GLubyte mask[] )
-{
- GLchan *buffer;
- GLuint i;
-
- buffer = get_alpha_buffer(ctx);
-
- if (mask) {
- for (i=0;i<n;i++) {
- if (mask[i]) {
- GLchan *aptr = buffer + y[i] * ctx->DrawBuffer->Width + x[i];
- *aptr = rgba[i][ACOMP];
- }
- }
- }
- else {
- for (i=0;i<n;i++) {
- GLchan *aptr = buffer + y[i] * ctx->DrawBuffer->Width + x[i];
- *aptr = rgba[i][ACOMP];
- }
- }
-}
-
-
-void
-_swrast_write_mono_alpha_pixels( GLcontext *ctx,
- GLuint n, const GLint x[], const GLint y[],
- GLchan alpha, const GLubyte mask[] )
-{
- GLchan *buffer;
- GLuint i;
-
- buffer = get_alpha_buffer(ctx);
-
- if (mask) {
- for (i=0;i<n;i++) {
- if (mask[i]) {
- GLchan *aptr = buffer + y[i] * ctx->DrawBuffer->Width + x[i];
- *aptr = alpha;
- }
- }
- }
- else {
- for (i=0;i<n;i++) {
- GLchan *aptr = buffer + y[i] * ctx->DrawBuffer->Width + x[i];
- *aptr = alpha;
- }
- }
-}
-
-
-
-void
-_swrast_read_alpha_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, GLchan rgba[][4] )
-{
- const GLchan *buffer, *aptr;
- GLuint i;
-
- buffer = get_alpha_buffer(ctx);
- aptr = buffer + y * ctx->DrawBuffer->Width + x;
-
- for (i = 0; i < n; i++)
- rgba[i][ACOMP] = *aptr++;
-}
-
-
-void
-_swrast_read_alpha_pixels( GLcontext *ctx,
- GLuint n, const GLint x[], const GLint y[],
- GLchan rgba[][4], const GLubyte mask[] )
-{
- const GLchan *buffer;
- GLuint i;
-
- buffer = get_alpha_buffer(ctx);
-
- for (i = 0; i < n; i++) {
- if (mask[i]) {
- const GLchan *aptr = buffer + y[i] * ctx->DrawBuffer->Width + x[i];
- rgba[i][ACOMP] = *aptr;
- }
- }
-}
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