home *** CD-ROM | disk | FTP | other *** search
- /* $Id: logic.c,v 1.2.2.1 1999/12/12 18:30:47 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.
- */
-
-
-
-
-
- #ifdef PC_HEADER
- #include "all.h"
- #else
- #ifndef XFree86Server
- #include <stdlib.h>
- #else
- #include "GL/xf86glx.h"
- #endif
- #include "alphabuf.h"
- #include "context.h"
- #include "logic.h"
- #include "macros.h"
- #include "pb.h"
- #include "span.h"
- #include "types.h"
- #endif
-
-
-
- void gl_LogicOp( GLcontext *ctx, GLenum opcode )
- {
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glLogicOp");
- switch (opcode) {
- case GL_CLEAR:
- case GL_SET:
- case GL_COPY:
- case GL_COPY_INVERTED:
- case GL_NOOP:
- case GL_INVERT:
- case GL_AND:
- case GL_NAND:
- case GL_OR:
- case GL_NOR:
- case GL_XOR:
- case GL_EQUIV:
- case GL_AND_REVERSE:
- case GL_AND_INVERTED:
- case GL_OR_REVERSE:
- case GL_OR_INVERTED:
- ctx->Color.LogicOp = opcode;
- ctx->NewState |= NEW_RASTER_OPS;
- return;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glLogicOp" );
- return;
- }
-
- if (ctx->Driver.LogicOpcode)
- ctx->Driver.LogicOpcode( ctx, opcode );
- }
-
-
-
- /*
- * Apply logic op to array of CI pixels.
- */
- static void index_logicop( GLcontext *ctx, GLuint n,
- GLuint index[], const GLuint dest[],
- const GLubyte mask[] )
- {
- GLuint i;
- switch (ctx->Color.LogicOp) {
- case GL_CLEAR:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = 0;
- }
- }
- break;
- case GL_SET:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = 1;
- }
- }
- break;
- case GL_COPY:
- /* do nothing */
- break;
- case GL_COPY_INVERTED:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = ~index[i];
- }
- }
- break;
- case GL_NOOP:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = dest[i];
- }
- }
- break;
- case GL_INVERT:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = ~dest[i];
- }
- }
- break;
- case GL_AND:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] &= dest[i];
- }
- }
- break;
- case GL_NAND:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = ~(index[i] & dest[i]);
- }
- }
- break;
- case GL_OR:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] |= dest[i];
- }
- }
- break;
- case GL_NOR:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = ~(index[i] | dest[i]);
- }
- }
- break;
- case GL_XOR:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] ^= dest[i];
- }
- }
- break;
- case GL_EQUIV:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = ~(index[i] ^ dest[i]);
- }
- }
- break;
- case GL_AND_REVERSE:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = index[i] & ~dest[i];
- }
- }
- break;
- case GL_AND_INVERTED:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = ~index[i] & dest[i];
- }
- }
- break;
- case GL_OR_REVERSE:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = index[i] | ~dest[i];
- }
- }
- break;
- case GL_OR_INVERTED:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- index[i] = ~index[i] | dest[i];
- }
- }
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "gl_logic error" );
- }
- }
-
-
-
- /*
- * Apply the current logic operator to a span of CI pixels. This is only
- * used if the device driver can't do logic ops.
- */
- void gl_logicop_ci_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
- GLuint index[], const GLubyte mask[] )
- {
- GLuint dest[MAX_WIDTH];
- /* Read dest values from frame buffer */
- (*ctx->Driver.ReadCI32Span)( ctx, n, x, y, dest );
- index_logicop( ctx, n, index, dest, mask );
- }
-
-
-
- /*
- * Apply the current logic operator to an array of CI pixels. This is only
- * used if the device driver can't do logic ops.
- */
- void gl_logicop_ci_pixels( GLcontext *ctx,
- GLuint n, const GLint x[], const GLint y[],
- GLuint index[], const GLubyte mask[] )
- {
- GLuint dest[PB_SIZE];
- /* Read dest values from frame buffer */
- (*ctx->Driver.ReadCI32Pixels)( ctx, n, x, y, dest, mask );
- index_logicop( ctx, n, index, dest, mask );
- }
-
-
-
- /*
- * Apply logic operator to rgba pixels.
- * Input: ctx - the context
- * n - number of pixels
- * mask - pixel mask array
- * In/Out: src - incoming pixels which will be modified
- * Input: dest - frame buffer values
- *
- * Note: Since the R, G, B, and A channels are all treated the same we
- * process them as 4-byte GLuints instead of four GLubytes.
- */
- static void rgba_logicop( const GLcontext *ctx, GLuint n,
- const GLubyte mask[],
- GLuint src[], const GLuint dest[] )
- {
- GLuint i;
- switch (ctx->Color.LogicOp) {
- case GL_CLEAR:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = 0;
- }
- }
- break;
- case GL_SET:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = 0xffffffff;
- }
- }
- break;
- case GL_COPY:
- /* do nothing */
- break;
- case GL_COPY_INVERTED:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = ~src[i];
- }
- }
- break;
- case GL_NOOP:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = dest[i];
- }
- }
- break;
- case GL_INVERT:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = ~dest[i];
- }
- }
- break;
- case GL_AND:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] &= dest[i];
- }
- }
- break;
- case GL_NAND:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = ~(src[i] & src[i]);
- }
- }
- break;
- case GL_OR:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i]|= dest[i];
- }
- }
- break;
- case GL_NOR:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = ~(src[i] | dest[i]);
- }
- }
- break;
- case GL_XOR:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] ^= dest[i];
- }
- }
- break;
- case GL_EQUIV:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = ~(src[i] ^ dest[i]);
- }
- }
- break;
- case GL_AND_REVERSE:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = src[i] & ~dest[i];
- }
- }
- break;
- case GL_AND_INVERTED:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = ~src[i] & dest[i];
- }
- }
- break;
- case GL_OR_REVERSE:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = src[i] | ~dest[i];
- }
- }
- break;
- case GL_OR_INVERTED:
- for (i=0;i<n;i++) {
- if (mask[i]) {
- src[i] = ~src[i] | dest[i];
- }
- }
- break;
- default:
- /* should never happen */
- gl_problem(ctx, "Bad function in rgba_logicop");
- }
- }
-
-
-
- /*
- * Apply the current logic operator to a span of RGBA pixels.
- * This is only used if the device driver can't do logic ops.
- */
- void gl_logicop_rgba_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y,
- GLubyte rgba[][4], const GLubyte mask[] )
- {
- GLubyte dest[MAX_WIDTH][4];
- gl_read_rgba_span( ctx, n, x, y, dest );
- rgba_logicop( ctx, n, mask, (GLuint *) rgba, (const GLuint *) dest );
- }
-
-
-
- /*
- * Apply the current logic operator to an array of RGBA pixels.
- * This is only used if the device driver can't do logic ops.
- */
- void gl_logicop_rgba_pixels( GLcontext *ctx,
- GLuint n, const GLint x[], const GLint y[],
- GLubyte rgba[][4], const GLubyte mask[] )
- {
- GLubyte dest[PB_SIZE][4];
- (*ctx->Driver.ReadRGBAPixels)( ctx, n, x, y, dest, mask );
- if (ctx->RasterMask & ALPHABUF_BIT) {
- gl_read_alpha_pixels( ctx, n, x, y, dest, mask );
- }
- rgba_logicop( ctx, n, mask, (GLuint *) rgba, (const GLuint *) dest );
- }
-