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/*
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* Mesa 3-D graphics library
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* Version: 6.5.1
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*
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* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* Templates for the span/pixel-array write/read functions called via
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* the gl_renderbuffer's GetRow, GetValues, PutRow, and PutValues.
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*
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* Define the following macros before including this file:
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* NAME(BASE) to generate the function name (i.e. add prefix or suffix)
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* RB_TYPE the renderbuffer DataType
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* SPAN_VARS to declare any local variables
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* INIT_PIXEL_PTR(P, X, Y) to initialize a pointer to a pixel
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* INC_PIXEL_PTR(P) to increment a pixel pointer by one pixel
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* STORE_PIXEL(DST, X, Y, VALUE) to store pixel values in buffer
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* FETCH_PIXEL(DST, SRC) to fetch pixel values from buffer
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*
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* Note that in the STORE_PIXEL macros, we also pass in the (X,Y) coordinates
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* for the pixels to be stored. This is useful when dithering and probably
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* ignored otherwise.
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*/
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#include "main/macros.h"
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#if !defined(RB_COMPONENTS)
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#define RB_COMPONENTS 4
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#endif
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static void
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NAME(get_row)( struct gl_context *ctx, struct gl_renderbuffer *rb,
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GLuint count, GLint x, GLint y, void *values )
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{
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#ifdef SPAN_VARS
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SPAN_VARS
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#endif
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RB_TYPE (*dest)[RB_COMPONENTS] = (RB_TYPE (*)[RB_COMPONENTS]) values;
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GLuint i;
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INIT_PIXEL_PTR(pixel, x, y);
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for (i = 0; i < count; i++) {
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FETCH_PIXEL(dest[i], pixel);
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INC_PIXEL_PTR(pixel);
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}
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(void) rb;
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(void) ctx;
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}
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static void
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NAME(get_values)( struct gl_context *ctx, struct gl_renderbuffer *rb,
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GLuint count, const GLint x[], const GLint y[], void *values )
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{
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#ifdef SPAN_VARS
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SPAN_VARS
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#endif
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RB_TYPE (*dest)[RB_COMPONENTS] = (RB_TYPE (*)[RB_COMPONENTS]) values;
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GLuint i;
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for (i = 0; i < count; i++) {
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INIT_PIXEL_PTR(pixel, x[i], y[i]);
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FETCH_PIXEL(dest[i], pixel);
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}
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(void) rb;
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(void) ctx;
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}
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static void
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NAME(put_row)( struct gl_context *ctx, struct gl_renderbuffer *rb,
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GLuint count, GLint x, GLint y,
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const void *values, const GLubyte mask[] )
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{
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#ifdef SPAN_VARS
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SPAN_VARS
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#endif
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const RB_TYPE (*src)[RB_COMPONENTS] = (const RB_TYPE (*)[RB_COMPONENTS]) values;
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GLuint i;
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INIT_PIXEL_PTR(pixel, x, y);
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if (mask) {
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for (i = 0; i < count; i++) {
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if (mask[i]) {
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STORE_PIXEL(pixel, x + i, y, src[i]);
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}
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INC_PIXEL_PTR(pixel);
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}
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}
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else {
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for (i = 0; i < count; i++) {
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STORE_PIXEL(pixel, x + i, y, src[i]);
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INC_PIXEL_PTR(pixel);
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}
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}
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(void) rb;
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(void) ctx;
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}
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static void
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NAME(put_values)( struct gl_context *ctx, struct gl_renderbuffer *rb,
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GLuint count, const GLint x[], const GLint y[],
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const void *values, const GLubyte mask[] )
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{
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#ifdef SPAN_VARS
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SPAN_VARS
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#endif
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const RB_TYPE (*src)[RB_COMPONENTS] = (const RB_TYPE (*)[RB_COMPONENTS]) values;
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GLuint i;
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ASSERT(mask);
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for (i = 0; i < count; i++) {
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if (mask[i]) {
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INIT_PIXEL_PTR(pixel, x[i], y[i]);
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STORE_PIXEL(pixel, x[i], y[i], src[i]);
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}
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}
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(void) rb;
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(void) ctx;
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}
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#undef NAME
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#undef RB_TYPE
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#undef RB_COMPONENTS
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#undef SPAN_VARS
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#undef INIT_PIXEL_PTR
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#undef INC_PIXEL_PTR
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#undef STORE_PIXEL
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#undef STORE_PIXEL_RGB
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#undef FETCH_PIXEL
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