2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 * Modified version of swrast/s_spantemp.h for front-buffer rendering. The
28 * no-mask paths use a scratch row to avoid repeated calls to the loader.
30 * For the mask paths we always use an array of 4 elements of RB_TYPE. This is
31 * to satisfy the xorg loader requirement of an image pitch of 32 bits and
32 * should be ok for other loaders also.
36 #ifndef _SWRAST_SPANTEMP_ONCE
37 #define _SWRAST_SPANTEMP_ONCE
40 PUT_PIXEL( struct gl_context *glCtx, GLint x, GLint y, GLvoid *p )
42 __DRIcontext *ctx = swrast_context(glCtx)->cPriv;
43 __DRIdrawable *draw = swrast_drawable(glCtx->DrawBuffer)->dPriv;
45 __DRIscreen *screen = ctx->driScreenPriv;
47 screen->swrast_loader->putImage(draw, __DRI_SWRAST_IMAGE_OP_DRAW,
48 x, y, 1, 1, (char *)p,
54 GET_PIXEL( struct gl_context *glCtx, GLint x, GLint y, GLubyte *p )
56 __DRIcontext *ctx = swrast_context(glCtx)->cPriv;
57 __DRIdrawable *read = swrast_drawable(glCtx->ReadBuffer)->dPriv;
59 __DRIscreen *screen = ctx->driScreenPriv;
61 screen->swrast_loader->getImage(read, x, y, 1, 1, (char *)p,
66 PUT_ROW( struct gl_context *glCtx, GLint x, GLint y, GLuint n, char *row )
68 __DRIcontext *ctx = swrast_context(glCtx)->cPriv;
69 __DRIdrawable *draw = swrast_drawable(glCtx->DrawBuffer)->dPriv;
71 __DRIscreen *screen = ctx->driScreenPriv;
73 screen->swrast_loader->putImage(draw, __DRI_SWRAST_IMAGE_OP_DRAW,
79 GET_ROW( struct gl_context *glCtx, GLint x, GLint y, GLuint n, char *row )
81 __DRIcontext *ctx = swrast_context(glCtx)->cPriv;
82 __DRIdrawable *read = swrast_drawable(glCtx->ReadBuffer)->dPriv;
84 __DRIscreen *screen = ctx->driScreenPriv;
86 screen->swrast_loader->getImage(read, x, y, n, 1, row,
90 #endif /* _SWRAST_SPANTEMP_ONCE */
94 * Templates for the span/pixel-array write/read functions called via
95 * the gl_renderbuffer's GetRow, GetValues, PutRow, PutMonoRow, PutValues
96 * and PutMonoValues functions.
98 * Define the following macros before including this file:
99 * NAME(BASE) to generate the function name (i.e. add prefix or suffix)
100 * RB_TYPE the renderbuffer DataType
101 * SPAN_VARS to declare any local variables
102 * INIT_PIXEL_PTR(P, X, Y) to initialize a pointer to a pixel
103 * INC_PIXEL_PTR(P) to increment a pixel pointer by one pixel
104 * STORE_PIXEL(DST, X, Y, VALUE) to store pixel values in buffer
105 * FETCH_PIXEL(DST, SRC) to fetch pixel values from buffer
107 * Note that in the STORE_PIXEL macros, we also pass in the (X,Y) coordinates
108 * for the pixels to be stored. This is useful when dithering and probably
112 #include "main/macros.h"
115 #if !defined(RB_COMPONENTS)
116 #define RB_COMPONENTS 4
121 NAME(get_row)( struct gl_context *ctx, struct gl_renderbuffer *rb,
122 GLuint count, GLint x, GLint y, void *values )
127 RB_TYPE (*dest)[RB_COMPONENTS] = (RB_TYPE (*)[RB_COMPONENTS]) values;
129 char *row = swrast_drawable(ctx->ReadBuffer)->row;
130 INIT_PIXEL_PTR(pixel, x, y);
131 GET_ROW( ctx, x, YFLIP(xrb, y), count, row );
132 for (i = 0; i < count; i++) {
133 FETCH_PIXEL(dest[i], pixel);
134 INC_PIXEL_PTR(pixel);
141 NAME(get_values)( struct gl_context *ctx, struct gl_renderbuffer *rb,
142 GLuint count, const GLint x[], const GLint y[], void *values )
147 RB_TYPE (*dest)[RB_COMPONENTS] = (RB_TYPE (*)[RB_COMPONENTS]) values;
149 for (i = 0; i < count; i++) {
151 GET_PIXEL(ctx, x[i], YFLIP(xrb, y[i]), pixel);
152 FETCH_PIXEL(dest[i], pixel);
159 NAME(put_row)( struct gl_context *ctx, struct gl_renderbuffer *rb,
160 GLuint count, GLint x, GLint y,
161 const void *values, const GLubyte mask[] )
166 const RB_TYPE (*src)[RB_COMPONENTS] = (const RB_TYPE (*)[RB_COMPONENTS]) values;
169 for (i = 0; i < count; i++) {
172 INIT_PIXEL_PTR(pixel, x, y);
173 STORE_PIXEL(pixel, x + i, y, src[i]);
174 PUT_PIXEL(ctx, x + i, YFLIP(xrb, y), pixel);
179 char *row = swrast_drawable(ctx->DrawBuffer)->row;
180 INIT_PIXEL_PTR(pixel, x, y);
181 for (i = 0; i < count; i++) {
182 STORE_PIXEL(pixel, x + i, y, src[i]);
183 INC_PIXEL_PTR(pixel);
185 PUT_ROW( ctx, x, YFLIP(xrb, y), count, row );
192 NAME(put_row_rgb)( struct gl_context *ctx, struct gl_renderbuffer *rb,
193 GLuint count, GLint x, GLint y,
194 const void *values, const GLubyte mask[] )
199 const RB_TYPE (*src)[3] = (const RB_TYPE (*)[3]) values;
202 for (i = 0; i < count; i++) {
205 INIT_PIXEL_PTR(pixel, x, y);
206 #ifdef STORE_PIXEL_RGB
207 STORE_PIXEL_RGB(pixel, x + i, y, src[i]);
209 STORE_PIXEL(pixel, x + i, y, src[i]);
211 PUT_PIXEL(ctx, x + i, YFLIP(xrb, y), pixel);
216 char *row = swrast_drawable(ctx->DrawBuffer)->row;
217 INIT_PIXEL_PTR(pixel, x, y);
218 for (i = 0; i < count; i++) {
219 #ifdef STORE_PIXEL_RGB
220 STORE_PIXEL_RGB(pixel, x + i, y, src[i]);
222 STORE_PIXEL(pixel, x + i, y, src[i]);
224 INC_PIXEL_PTR(pixel);
226 PUT_ROW( ctx, x, YFLIP(xrb, y), count, row );
233 NAME(put_mono_row)( struct gl_context *ctx, struct gl_renderbuffer *rb,
234 GLuint count, GLint x, GLint y,
235 const void *value, const GLubyte mask[] )
240 const RB_TYPE *src = (const RB_TYPE *) value;
243 for (i = 0; i < count; i++) {
246 INIT_PIXEL_PTR(pixel, x, y);
247 STORE_PIXEL(pixel, x + i, y, src);
248 PUT_PIXEL(ctx, x + i, YFLIP(xrb, y), pixel);
253 char *row = swrast_drawable(ctx->DrawBuffer)->row;
254 INIT_PIXEL_PTR(pixel, x, y);
255 for (i = 0; i < count; i++) {
256 STORE_PIXEL(pixel, x + i, y, src);
257 INC_PIXEL_PTR(pixel);
259 PUT_ROW( ctx, x, YFLIP(xrb, y), count, row );
266 NAME(put_values)( struct gl_context *ctx, struct gl_renderbuffer *rb,
267 GLuint count, const GLint x[], const GLint y[],
268 const void *values, const GLubyte mask[] )
273 const RB_TYPE (*src)[RB_COMPONENTS] = (const RB_TYPE (*)[RB_COMPONENTS]) values;
276 for (i = 0; i < count; i++) {
279 INIT_PIXEL_PTR(pixel, x, y);
280 STORE_PIXEL(pixel, x[i], y[i], src[i]);
281 PUT_PIXEL(ctx, x[i], YFLIP(xrb, y[i]), pixel);
289 NAME(put_mono_values)( struct gl_context *ctx, struct gl_renderbuffer *rb,
290 GLuint count, const GLint x[], const GLint y[],
291 const void *value, const GLubyte mask[] )
296 const RB_TYPE *src = (const RB_TYPE *) value;
299 for (i = 0; i < count; i++) {
302 INIT_PIXEL_PTR(pixel, x, y);
303 STORE_PIXEL(pixel, x[i], y[i], src);
304 PUT_PIXEL(ctx, x[i], YFLIP(xrb, y[i]), pixel);
315 #undef INIT_PIXEL_PTR
318 #undef STORE_PIXEL_RGB