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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.
*/
/*
* Templates for the span/pixel-array write/read functions called via
* the gl_renderbuffer's GetRow, GetValues, PutRow, PutMonoRow, PutValues
* and PutMonoValues functions.
*
* Define the following macros before including this file:
* NAME(PREFIX) to generate the function name
* FORMAT must be either GL_RGBA, GL_RGBA8 or GL_COLOR_INDEX8_EXT
* SPAN_VARS to declare any local variables
* INIT_PIXEL_PTR(P, X, Y) to initialize a pointer to a pixel
* INC_PIXEL_PTR(P) to increment a pixel pointer by one pixel
* STORE_PIXEL(DST, X, Y, VALUE) to store pixel values in buffer
* FETCH_PIXEL(DST, SRC) to fetch pixel values from buffer
*
* Note that in the STORE_PIXEL macros, we also pass in the (X,Y) coordinates
* for the pixels to be stored. This is useful when dithering and probably
* ignored otherwise.
*/
#include "macros.h"
static void
NAME(get_row)( GLcontext *ctx, struct gl_renderbuffer *rb,
GLuint count, GLint x, GLint y, void *values )
{
#ifdef SPAN_VARS
SPAN_VARS
#endif
#if FORMAT == GL_RGBA
GLchan (*dest)[4] = (GLchan (*)[4]) values;
#elif FORMAT == GL_RGBA8
GLubyte (*dest)[4] = (GLubyte (*)[4]) values;
#elif FORMAT == GL_COLOR_INDEX8_EXT
GLubyte *dest = (GLubyte *) values;
#else
#error FORMAT must be set!!!!
#endif
GLuint i;
INIT_PIXEL_PTR(pixel, x, y);
for (i = 0; i < count; i++) {
FETCH_PIXEL(dest[i], pixel);
INC_PIXEL_PTR(pixel);
}
}
static void
NAME(get_values)( GLcontext *ctx, struct gl_renderbuffer *rb,
GLuint count, const GLint x[], const GLint y[], void *values )
{
#ifdef SPAN_VARS
SPAN_VARS
#endif
#if FORMAT == GL_RGBA
GLchan (*dest)[4] = (GLchan (*)[4]) values;
#elif FORMAT == GL_RGBA8
GLubyte (*dest)[4] = (GLubyte (*)[4]) values;
#elif FORMAT == GL_COLOR_INDEX8_EXT
GLubyte *dest = (GLubyte *) values;
#endif
GLuint i;
for (i = 0; i < count; i++) {
INIT_PIXEL_PTR(pixel, x[i], y[i]);
FETCH_PIXEL(dest[i], pixel);
}
}
static void
NAME(put_row)( GLcontext *ctx, struct gl_renderbuffer *rb,
GLuint count, GLint x, GLint y,
const void *values, const GLubyte mask[] )
{
#ifdef SPAN_VARS
SPAN_VARS
#endif
#if FORMAT == GL_RGBA
const GLchan (*src)[4] = (const GLchan (*)[4]) values;
#elif FORMAT == GL_RGBA8
const GLubyte (*src)[4] = (const GLubyte (*)[4]) values;
#elif FORMAT == GL_COLOR_INDEX8_EXT
const GLubyte (*src)[1] = (const GLubyte (*)[1]) values;
#endif
GLuint i;
INIT_PIXEL_PTR(pixel, x, y);
if (mask) {
for (i = 0; i < count; i++) {
if (mask[i]) {
STORE_PIXEL(pixel, x + i, y, src[i]);
}
INC_PIXEL_PTR(pixel);
}
}
else {
for (i = 0; i < count; i++) {
STORE_PIXEL(pixel, x + i, y, src[i]);
INC_PIXEL_PTR(pixel);
}
}
}
#if 00
static void
NAME(write_rgb_span)( const GLcontext *ctx, struct gl_renderbuffer *rb,
GLuint count, GLint x, GLint y,
CONST GLchan rgb[][3], const GLubyte mask[] )
{
#ifdef SPAN_VARS
SPAN_VARS
#endif
GLuint i;
INIT_PIXEL_PTR(pixel, x, y);
if (mask) {
for (i = 0; i < count; i++) {
if (mask[i]) {
STORE_RGB_PIXEL(pixel, x+i, y, rgb[i][RCOMP], rgb[i][GCOMP],
rgb[i][BCOMP]);
}
INC_PIXEL_PTR(pixel);
}
}
else {
for (i = 0; i < count; i++) {
STORE_RGB_PIXEL(pixel, x+i, y, rgb[i][RCOMP], rgb[i][GCOMP],
rgb[i][BCOMP]);
INC_PIXEL_PTR(pixel);
}
}
}
#endif
static void
NAME(put_mono_row)( GLcontext *ctx, struct gl_renderbuffer *rb,
GLuint count, GLint x, GLint y,
const void *value, const GLubyte mask[] )
{
#ifdef SPAN_VARS
SPAN_VARS
#endif
#if FORMAT == GL_RGBA
const GLchan *src = (const GLchan *) value;
#elif FORMAT == GL_RGBA8
const GLubyte *src = (const GLubyte *) value;
#elif FORMAT == GL_COLOR_INDEX8_EXT
const GLubyte *src = (const GLubyte *) value;
#endif
GLuint i;
INIT_PIXEL_PTR(pixel, x, y);
if (mask) {
for (i = 0; i < count; i++) {
if (mask[i]) {
STORE_PIXEL(pixel, x + i, y, src);
}
INC_PIXEL_PTR(pixel);
}
}
else {
for (i = 0; i < count; i++) {
STORE_PIXEL(pixel, x + i, y, src);
INC_PIXEL_PTR(pixel);
}
}
}
static void
NAME(put_values)( GLcontext *ctx, struct gl_renderbuffer *rb,
GLuint count, const GLint x[], const GLint y[],
const void *values, const GLubyte mask[] )
{
#ifdef SPAN_VARS
SPAN_VARS
#endif
#if FORMAT == GL_RGBA
const GLchan (*src)[4] = (const GLchan (*)[4]) values;
#elif FORMAT == GL_RGBA8
const GLubyte (*src)[4] = (const GLubyte (*)[4]) values;
#elif FORMAT == GL_COLOR_INDEX8_EXT
const GLubyte (*src)[1] = (const GLubyte (*)[1]) values;
#endif
GLuint i;
ASSERT(mask);
for (i = 0; i < count; i++) {
if (mask[i]) {
INIT_PIXEL_PTR(pixel, x[i], y[i]);
STORE_PIXEL(pixel, x[i], y[i], src[i]);
}
}
}
static void
NAME(put_mono_values)( GLcontext *ctx, struct gl_renderbuffer *rb,
GLuint count, const GLint x[], const GLint y[],
const void *value, const GLubyte mask[] )
{
#ifdef SPAN_VARS
SPAN_VARS
#endif
#if FORMAT == GL_RGBA
const GLchan *src = (const GLchan *) value;
#elif FORMAT == GL_RGBA8
const GLubyte *src = (const GLubyte *) value;
#elif FORMAT == GL_COLOR_INDEX8_EXT
const GLubyte *src = (const GLubyte *) value;
#endif
GLuint i;
ASSERT(mask);
for (i = 0; i < count; i++) {
if (mask[i]) {
INIT_PIXEL_PTR(pixel, x[i], y[i]);
STORE_PIXEL(pixel, x[i], y[i], src);
}
}
}
#undef NAME
#undef SPAN_VARS
#undef INIT_PIXEL_PTR
#undef INC_PIXEL_PTR
#undef STORE_PIXEL
#undef FETCH_PIXEL
#undef FORMAT
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