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/*
* Mesa 3-D graphics library
* Version: 6.3
*
* Copyright (C) 1999-2005 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.
*/
#include "glheader.h"
#include "context.h"
#include "imports.h"
#include "macros.h"
#include "s_context.h"
#include "s_logic.h"
#include "s_span.h"
#define LOGIC_OP_LOOP(MODE) \
do { \
GLuint i; \
switch (MODE) { \
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] = ~0; \
} \
} \
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] & dest[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: \
_mesa_problem(ctx, "bad logicop mode");\
} \
} while (0)
static void
logicop_ubyte(GLcontext *ctx, GLuint n, GLubyte src[], const GLubyte dest[],
const GLubyte mask[])
{
LOGIC_OP_LOOP(ctx->Color.LogicOp);
}
static void
logicop_ushort(GLcontext *ctx, GLuint n, GLushort src[], const GLushort dest[],
const GLubyte mask[])
{
LOGIC_OP_LOOP(ctx->Color.LogicOp);
}
static void
logicop_uint(GLcontext *ctx, GLuint n, GLuint src[], const GLuint dest[],
const GLubyte mask[])
{
LOGIC_OP_LOOP(ctx->Color.LogicOp);
}
/*
* 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
_swrast_logicop_ci_span(GLcontext *ctx, struct gl_renderbuffer *rb,
const struct sw_span *span, GLuint index[])
{
GLuint dest[MAX_WIDTH];
ASSERT(span->end < MAX_WIDTH);
ASSERT(rb->DataType == GL_UNSIGNED_INT);
/* Read dest values from frame buffer */
if (span->arrayMask & SPAN_XY) {
rb->GetValues(ctx, rb, span->end, span->array->x, span->array->y, dest);
}
else {
rb->GetRow(ctx, rb, span->end, span->x, span->y, dest);
}
logicop_uint(ctx, span->end, index, dest, span->array->mask);
}
/**
* 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(GLcontext *ctx, struct gl_renderbuffer *rb,
const struct sw_span *span, GLchan rgba[][4])
{
GLchan dest[MAX_WIDTH][4];
ASSERT(span->end < MAX_WIDTH);
ASSERT(span->arrayMask & SPAN_RGBA);
ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
if (span->arrayMask & SPAN_XY) {
rb->GetValues(ctx, rb, span->end, span->array->x, span->array->y, dest);
}
else {
_swrast_read_rgba_span(ctx, rb, span->end, span->x, span->y, dest);
}
/* XXX make this a runtime test */
#if CHAN_TYPE == GL_UNSIGNED_BYTE
/* treat 4*GLubyte as GLuint */
logicop_uint(ctx, span->end, (GLuint *) rgba,
(const GLuint *) dest, span->array->mask);
#elif CHAN_TYPE == GL_UNSIGNED_SHORT
logicop_ushort(ctx, 4 * span->end, (GLushort *) rgba,
(const GLushort *) dest, span->array->mask);
#elif CHAN_TYPE == GL_FLOAT
logicop_uint(ctx, 4 * span->end, (GLuint *) rgba,
(const GLuint *) dest, span->array->mask);
#endif
(void) logicop_ubyte;
(void) logicop_ushort;
(void) logicop_uint;
}
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