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- /* $Id: masking.c,v 1.3 1999/10/08 09:27:11 keithw Exp $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 3.1
- *
- * Copyright (C) 1999 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.
- */
-
-
-
-
-
- /*
- * Implement the effect of glColorMask and glIndexMask in software.
- */
-
-
- #ifdef PC_HEADER
- #include "all.h"
- #else
- #ifndef XFree86Server
- #include <string.h>
- #include <stdio.h>
- #else
- #include "GL/xf86glx.h"
- #endif
- #include "alphabuf.h"
- #include "context.h"
- #include "enums.h"
- #include "macros.h"
- #include "masking.h"
- #include "pb.h"
- #include "span.h"
- #include "types.h"
- #endif
-
-
-
- void gl_IndexMask( GLcontext *ctx, GLuint mask )
- {
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glIndexMask");
- ctx->Color.IndexMask = mask;
- ctx->NewState |= NEW_RASTER_OPS;
- }
-
-
-
- void gl_ColorMask( GLcontext *ctx, GLboolean red, GLboolean green,
- GLboolean blue, GLboolean alpha )
- {
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glColorMask");
-
- if (MESA_VERBOSE & VERBOSE_API)
- fprintf(stderr, "glColorMask %d %d %d %d\n", red, green, blue, alpha);
-
- ctx->Color.ColorMask[RCOMP] = red ? 0xff : 0x0;
- ctx->Color.ColorMask[GCOMP] = green ? 0xff : 0x0;
- ctx->Color.ColorMask[BCOMP] = blue ? 0xff : 0x0;
- ctx->Color.ColorMask[ACOMP] = alpha ? 0xff : 0x0;
-
- if (ctx->Driver.ColorMask)
- ctx->Driver.ColorMask( ctx, red, green, blue, alpha );
-
- ctx->NewState |= NEW_RASTER_OPS;
- }
-
-
-
-
- /*
- * Apply glColorMask to a span of RGBA pixels.
- */
- void gl_mask_rgba_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, GLubyte rgba[][4] )
- {
- GLubyte dest[MAX_WIDTH][4];
- GLuint srcMask = *((GLuint*)ctx->Color.ColorMask);
- GLuint dstMask = ~srcMask;
- GLuint *rgba32 = (GLuint *) rgba;
- GLuint *dest32 = (GLuint *) dest;
- GLuint i;
-
- gl_read_rgba_span( ctx, n, x, y, dest );
-
- for (i=0; i<n; i++) {
- rgba32[i] = (rgba32[i] & srcMask) | (dest32[i] & dstMask);
- }
- }
-
-
-
- /*
- * Apply glColorMask to an array of RGBA pixels.
- */
- void gl_mask_rgba_pixels( GLcontext *ctx,
- GLuint n, const GLint x[], const GLint y[],
- GLubyte rgba[][4], const GLubyte mask[] )
- {
- GLubyte dest[PB_SIZE][4];
- GLuint srcMask = *((GLuint*)ctx->Color.ColorMask);
- GLuint dstMask = ~srcMask;
- GLuint *rgba32 = (GLuint *) rgba;
- GLuint *dest32 = (GLuint *) dest;
- GLuint i;
-
- (*ctx->Driver.ReadRGBAPixels)( ctx, n, x, y, dest, mask );
- if (ctx->RasterMask & ALPHABUF_BIT) {
- gl_read_alpha_pixels( ctx, n, x, y, dest, mask );
- }
-
- for (i=0; i<n; i++) {
- rgba32[i] = (rgba32[i] & srcMask) | (dest32[i] & dstMask);
- }
- }
-
-
-
- /*
- * Apply glIndexMask to a span of CI pixels.
- */
- void gl_mask_index_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, GLuint index[] )
- {
- GLuint i;
- GLuint fbindexes[MAX_WIDTH];
- GLuint msrc, mdest;
-
- gl_read_index_span( ctx, n, x, y, fbindexes );
-
- msrc = ctx->Color.IndexMask;
- mdest = ~msrc;
-
- for (i=0;i<n;i++) {
- index[i] = (index[i] & msrc) | (fbindexes[i] & mdest);
- }
- }
-
-
-
- /*
- * Apply glIndexMask to an array of CI pixels.
- */
- void gl_mask_index_pixels( GLcontext *ctx,
- GLuint n, const GLint x[], const GLint y[],
- GLuint index[], const GLubyte mask[] )
- {
- GLuint i;
- GLuint fbindexes[PB_SIZE];
- GLuint msrc, mdest;
-
- (*ctx->Driver.ReadCI32Pixels)( ctx, n, x, y, fbindexes, mask );
-
- msrc = ctx->Color.IndexMask;
- mdest = ~msrc;
-
- for (i=0;i<n;i++) {
- index[i] = (index[i] & msrc) | (fbindexes[i] & mdest);
- }
- }
-
-