1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
33 #include "main/imports.h"
34 #include "main/image.h"
35 #include "main/macros.h"
37 #include "st_context.h"
39 #include "st_cb_accum.h"
40 #include "st_cb_fbo.h"
42 #include "st_format.h"
43 #include "pipe/p_context.h"
44 #include "pipe/p_defines.h"
45 #include "pipe/p_inlines.h"
49 * For hardware that supports deep color buffers, we could accelerate
50 * most/all the accum operations with blending/texturing.
51 * For now, just use the get/put_tile() functions and do things in software.
56 st_clear_accum_buffer(GLcontext
*ctx
, struct gl_renderbuffer
*rb
)
58 struct pipe_context
*pipe
= ctx
->st
->pipe
;
59 struct st_renderbuffer
*acc_strb
= st_renderbuffer(rb
);
60 struct pipe_surface
*acc_ps
= acc_strb
->surface
;
61 const GLint xpos
= ctx
->DrawBuffer
->_Xmin
;
62 const GLint ypos
= ctx
->DrawBuffer
->_Ymin
;
63 const GLint width
= ctx
->DrawBuffer
->_Xmax
- xpos
;
64 const GLint height
= ctx
->DrawBuffer
->_Ymax
- ypos
;
65 const GLfloat r
= ctx
->Accum
.ClearColor
[0];
66 const GLfloat g
= ctx
->Accum
.ClearColor
[1];
67 const GLfloat b
= ctx
->Accum
.ClearColor
[2];
68 const GLfloat a
= ctx
->Accum
.ClearColor
[3];
72 (void) pipe_surface_map(acc_ps
);
74 accBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
76 for (i
= 0; i
< width
* height
; i
++) {
77 accBuf
[i
* 4 + 0] = r
;
78 accBuf
[i
* 4 + 1] = g
;
79 accBuf
[i
* 4 + 2] = b
;
80 accBuf
[i
* 4 + 3] = a
;
83 pipe
->put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
87 pipe_surface_unmap(acc_ps
);
94 accum_mad(struct pipe_context
*pipe
, GLfloat scale
, GLfloat bias
,
95 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
96 struct pipe_surface
*acc_ps
)
101 accBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
103 (void) pipe_surface_map(acc_ps
);
105 pipe
->get_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
107 for (i
= 0; i
< 4 * width
* height
; i
++) {
108 accBuf
[i
] = accBuf
[i
] * scale
+ bias
;
111 pipe
->put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
115 pipe_surface_unmap(acc_ps
);
120 accum_accum(struct pipe_context
*pipe
, GLfloat value
,
121 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
122 struct pipe_surface
*acc_ps
,
123 struct pipe_surface
*color_ps
)
125 ubyte
*colorMap
, *accMap
;
126 GLfloat
*colorBuf
, *accBuf
;
129 colorBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
130 accBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
132 colorMap
= pipe_surface_map(color_ps
);
133 accMap
= pipe_surface_map(acc_ps
);
135 pipe
->get_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, colorBuf
);
136 pipe
->get_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
138 for (i
= 0; i
< 4 * width
* height
; i
++) {
139 accBuf
[i
] = accBuf
[i
] + colorBuf
[i
] * value
;
142 pipe
->put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
147 pipe_surface_unmap(color_ps
);
148 pipe_surface_unmap(acc_ps
);
153 accum_load(struct pipe_context
*pipe
, GLfloat value
,
154 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
155 struct pipe_surface
*acc_ps
,
156 struct pipe_surface
*color_ps
)
161 buf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
163 (void) pipe_surface_map(color_ps
);
164 (void) pipe_surface_map(acc_ps
);
166 pipe
->get_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, buf
);
168 for (i
= 0; i
< 4 * width
* height
; i
++) {
169 buf
[i
] = buf
[i
] * value
;
172 pipe
->put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, buf
);
176 pipe_surface_unmap(color_ps
);
177 pipe_surface_unmap(acc_ps
);
182 accum_return(GLcontext
*ctx
, GLfloat value
,
183 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
184 struct pipe_surface
*acc_ps
,
185 struct pipe_surface
*color_ps
)
187 struct pipe_context
*pipe
= ctx
->st
->pipe
;
188 const GLubyte
*colormask
= ctx
->Color
.ColorMask
;
189 GLfloat
*abuf
, *cbuf
= NULL
;
192 abuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
194 (void) pipe_surface_map(color_ps
);
195 (void) pipe_surface_map(acc_ps
);
197 pipe
->get_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, abuf
);
199 if (!colormask
[0] || !colormask
[1] || !colormask
[2] || !colormask
[3]) {
200 cbuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
201 pipe
->get_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, cbuf
);
204 for (i
= 0; i
< width
* height
; i
++) {
205 for (ch
= 0; ch
< 4; ch
++) {
207 GLfloat val
= abuf
[i
* 4 + ch
] * value
;
208 abuf
[i
* 4 + ch
] = CLAMP(val
, 0.0, 1.0);
211 abuf
[i
* 4 + ch
] = cbuf
[i
* 4 + ch
];
216 pipe
->put_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, abuf
);
222 pipe_surface_unmap(color_ps
);
223 pipe_surface_unmap(acc_ps
);
228 st_Accum(GLcontext
*ctx
, GLenum op
, GLfloat value
)
230 struct st_context
*st
= ctx
->st
;
231 struct pipe_context
*pipe
= st
->pipe
;
232 struct st_renderbuffer
*acc_strb
233 = st_renderbuffer(ctx
->DrawBuffer
->Attachment
[BUFFER_ACCUM
].Renderbuffer
);
234 struct st_renderbuffer
*color_strb
235 = st_renderbuffer(ctx
->ReadBuffer
->_ColorReadBuffer
);
236 struct pipe_surface
*acc_ps
= acc_strb
->surface
;
237 struct pipe_surface
*color_ps
= color_strb
->surface
;
239 const GLint xpos
= ctx
->DrawBuffer
->_Xmin
;
240 const GLint ypos
= ctx
->DrawBuffer
->_Ymin
;
241 const GLint width
= ctx
->DrawBuffer
->_Xmax
- xpos
;
242 const GLint height
= ctx
->DrawBuffer
->_Ymax
- ypos
;
244 /* make sure color bufs aren't cached */
245 pipe
->flush(pipe
, 0);
250 accum_mad(pipe
, 1.0, value
, xpos
, ypos
, width
, height
, acc_ps
);
255 accum_mad(pipe
, value
, 0.0, xpos
, ypos
, width
, height
, acc_ps
);
260 accum_accum(pipe
, value
, xpos
, ypos
, width
, height
, acc_ps
, color_ps
);
264 accum_load(pipe
, value
, xpos
, ypos
, width
, height
, acc_ps
, color_ps
);
267 accum_return(ctx
, value
, xpos
, ypos
, width
, height
, acc_ps
, color_ps
);
276 void st_init_accum_functions(struct dd_function_table
*functions
)
278 functions
->Accum
= st_Accum
;