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/*
* Mesa 3-D graphics library
*
* 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
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#include "main/glheader.h"
#include "main/context.h"
#include "main/imports.h"
#include "main/macros.h"
#include "s_context.h"
#include "s_logic.h"
#include "s_span.h"
/**
* We do all logic ops on 4-byte GLuints.
* Depending on bytes per pixel, the mask array elements correspond to
* 1, 2 or 4 GLuints.
*/
#define LOGIC_OP_LOOP(MODE, MASKSTRIDE) \
do { \
GLuint i; \
switch (MODE) { \
case GL_CLEAR: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = 0; \
} \
} \
break; \
case GL_SET: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = ~0; \
} \
} \
break; \
case GL_COPY: \
/* do nothing */ \
break; \
case GL_COPY_INVERTED: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = ~src[i]; \
} \
} \
break; \
case GL_NOOP: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = dest[i]; \
} \
} \
break; \
case GL_INVERT: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = ~dest[i]; \
} \
} \
break; \
case GL_AND: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] &= dest[i]; \
} \
} \
break; \
case GL_NAND: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = ~(src[i] & dest[i]); \
} \
} \
break; \
case GL_OR: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] |= dest[i]; \
} \
} \
break; \
case GL_NOR: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = ~(src[i] | dest[i]); \
} \
} \
break; \
case GL_XOR: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] ^= dest[i]; \
} \
} \
break; \
case GL_EQUIV: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = ~(src[i] ^ dest[i]); \
} \
} \
break; \
case GL_AND_REVERSE: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = src[i] & ~dest[i]; \
} \
} \
break; \
case GL_AND_INVERTED: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = ~src[i] & dest[i]; \
} \
} \
break; \
case GL_OR_REVERSE: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = src[i] | ~dest[i]; \
} \
} \
break; \
case GL_OR_INVERTED: \
for (i = 0; i < n; i++) { \
if (mask[i / MASKSTRIDE]) { \
src[i] = ~src[i] | dest[i]; \
} \
} \
break; \
default: \
_mesa_problem(ctx, "bad logicop mode");\
} \
} while (0)
static inline void
logicop_uint1(struct gl_context *ctx, GLuint n, GLuint src[], const GLuint dest[],
const GLubyte mask[])
{
LOGIC_OP_LOOP(ctx->Color.LogicOp, 1);
}
static inline void
logicop_uint2(struct gl_context *ctx, GLuint n, GLuint src[], const GLuint dest[],
const GLubyte mask[])
{
LOGIC_OP_LOOP(ctx->Color.LogicOp, 2);
}
static inline void
logicop_uint4(struct gl_context *ctx, GLuint n, GLuint src[], const GLuint dest[],
const GLubyte mask[])
{
LOGIC_OP_LOOP(ctx->Color.LogicOp, 4);
}
/**
* Apply the current logic operator to a span of RGBA pixels.
* We can handle horizontal runs of pixels (spans) or arrays of x/y
* pixel coordinates.
*/
void
_swrast_logicop_rgba_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
SWspan *span)
{
void *rbPixels;
assert(span->end < SWRAST_MAX_WIDTH);
assert(span->arrayMask & SPAN_RGBA);
rbPixels = _swrast_get_dest_rgba(ctx, rb, span);
if (span->array->ChanType == GL_UNSIGNED_BYTE) {
/* treat 4*GLubyte as GLuint */
logicop_uint1(ctx, span->end,
(GLuint *) span->array->rgba8,
(const GLuint *) rbPixels, span->array->mask);
}
else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
/* treat 2*GLushort as GLuint */
logicop_uint2(ctx, 2 * span->end,
(GLuint *) span->array->rgba16,
(const GLuint *) rbPixels, span->array->mask);
}
else {
logicop_uint4(ctx, 4 * span->end,
(GLuint *) span->array->attribs[VARYING_SLOT_COL0],
(const GLuint *) rbPixels, span->array->mask);
}
}
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