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* Mesa 3-D graphics library
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* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
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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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* 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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* 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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* Modified version of swrast/s_spantemp.h for front-buffer rendering. The
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* no-mask paths use a scratch row to avoid repeated calls to the loader.
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* For the mask paths we always use an array of 4 elements of RB_TYPE. This is
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* to satisfy the xorg loader requirement of an image pitch of 32 bits and
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* should be ok for other loaders also.
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#ifndef _SWRAST_SPANTEMP_ONCE
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#define _SWRAST_SPANTEMP_ONCE
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PUT_PIXEL( GLcontext *glCtx, GLint x, GLint y, GLubyte *p )
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__DRIcontext *ctx = swrast_context(glCtx);
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__DRIdrawable *draw = swrast_drawable(glCtx->DrawBuffer);
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__DRIscreen *screen = ctx->driScreenPriv;
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screen->swrast_loader->putImage(draw, __DRI_SWRAST_IMAGE_OP_DRAW,
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x, y, 1, 1, (char *)p,
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GET_PIXEL( GLcontext *glCtx, GLint x, GLint y, GLubyte *p )
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__DRIcontext *ctx = swrast_context(glCtx);
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__DRIdrawable *read = swrast_drawable(glCtx->ReadBuffer);
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__DRIscreen *screen = ctx->driScreenPriv;
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screen->swrast_loader->getImage(read, x, y, 1, 1, (char *)p,
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PUT_ROW( GLcontext *glCtx, GLint x, GLint y, GLuint n, char *row )
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__DRIcontext *ctx = swrast_context(glCtx);
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__DRIdrawable *draw = swrast_drawable(glCtx->DrawBuffer);
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__DRIscreen *screen = ctx->driScreenPriv;
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screen->swrast_loader->putImage(draw, __DRI_SWRAST_IMAGE_OP_DRAW,
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GET_ROW( GLcontext *glCtx, GLint x, GLint y, GLuint n, char *row )
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__DRIcontext *ctx = swrast_context(glCtx);
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__DRIdrawable *read = swrast_drawable(glCtx->ReadBuffer);
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__DRIscreen *screen = ctx->driScreenPriv;
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screen->swrast_loader->getImage(read, x, y, n, 1, row,
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#endif /* _SWRAST_SPANTEMP_ONCE */
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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, PutMonoRow, PutValues
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* and PutMonoValues functions.
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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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* CI_MODE if set, color index mode, else RGBA
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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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* 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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#include "main/macros.h"
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#define RB_COMPONENTS 1
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#elif !defined(RB_COMPONENTS)
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#define RB_COMPONENTS 4
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NAME(get_row)( GLcontext *ctx, struct gl_renderbuffer *rb,
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GLuint count, GLint x, GLint y, void *values )
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RB_TYPE *dest = (RB_TYPE *) values;
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RB_TYPE (*dest)[RB_COMPONENTS] = (RB_TYPE (*)[RB_COMPONENTS]) values;
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char *row = swrast_drawable(ctx->ReadBuffer)->row;
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INIT_PIXEL_PTR(pixel, x, y);
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GET_ROW( ctx, x, YFLIP(xrb, y), count, row );
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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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NAME(get_values)( GLcontext *ctx, struct gl_renderbuffer *rb,
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GLuint count, const GLint x[], const GLint y[], void *values )
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RB_TYPE *dest = (RB_TYPE *) values;
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RB_TYPE (*dest)[RB_COMPONENTS] = (RB_TYPE (*)[RB_COMPONENTS]) values;
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for (i = 0; i < count; i++) {
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GET_PIXEL(ctx, x[i], YFLIP(xrb, y[i]), pixel);
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FETCH_PIXEL(dest[i], pixel);
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NAME(put_row)( GLcontext *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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const RB_TYPE (*src)[RB_COMPONENTS] = (const RB_TYPE (*)[RB_COMPONENTS]) values;
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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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PUT_PIXEL(ctx, x + i, YFLIP(xrb, y), pixel);
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char *row = swrast_drawable(ctx->DrawBuffer)->row;
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INIT_PIXEL_PTR(pixel, x, y);
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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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PUT_ROW( ctx, x, YFLIP(xrb, y), count, row );
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#if !defined(CI_MODE)
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NAME(put_row_rgb)( GLcontext *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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const RB_TYPE (*src)[3] = (const RB_TYPE (*)[3]) values;
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for (i = 0; i < count; i++) {
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#ifdef STORE_PIXEL_RGB
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STORE_PIXEL_RGB(pixel, x + i, y, src[i]);
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STORE_PIXEL(pixel, x + i, y, src[i]);
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PUT_PIXEL(ctx, x + i, YFLIP(xrb, y), pixel);
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char *row = swrast_drawable(ctx->DrawBuffer)->row;
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INIT_PIXEL_PTR(pixel, x, y);
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for (i = 0; i < count; i++) {
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#ifdef STORE_PIXEL_RGB
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STORE_PIXEL_RGB(pixel, x + i, y, src[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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PUT_ROW( ctx, x, YFLIP(xrb, y), count, row );
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NAME(put_mono_row)( GLcontext *ctx, struct gl_renderbuffer *rb,
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GLuint count, GLint x, GLint y,
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const void *value, const GLubyte mask[] )
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const RB_TYPE *src = (const RB_TYPE *) value;
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for (i = 0; i < count; i++) {
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STORE_PIXEL(pixel, x + i, y, src);
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PUT_PIXEL(ctx, x + i, YFLIP(xrb, y), pixel);
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char *row = swrast_drawable(ctx->DrawBuffer)->row;
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INIT_PIXEL_PTR(pixel, x, y);
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for (i = 0; i < count; i++) {
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STORE_PIXEL(pixel, x + i, y, src);
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INC_PIXEL_PTR(pixel);
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PUT_ROW( ctx, x, YFLIP(xrb, y), count, row );
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NAME(put_values)( GLcontext *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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const RB_TYPE (*src)[RB_COMPONENTS] = (const RB_TYPE (*)[RB_COMPONENTS]) values;
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for (i = 0; i < count; i++) {
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STORE_PIXEL(pixel, x[i], y[i], src[i]);
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PUT_PIXEL(ctx, x[i], YFLIP(xrb, y[i]), pixel);
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NAME(put_mono_values)( GLcontext *ctx, struct gl_renderbuffer *rb,
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GLuint count, const GLint x[], const GLint y[],
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const void *value, const GLubyte mask[] )
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const RB_TYPE *src = (const RB_TYPE *) value;
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for (i = 0; i < count; i++) {
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STORE_PIXEL(pixel, x[i], y[i], src);
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PUT_PIXEL(ctx, x[i], YFLIP(xrb, y[i]), pixel);
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#undef INIT_PIXEL_PTR
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#undef STORE_PIXEL_RGB