1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/**************************************************************************
*
* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
#include "main/glheader.h"
#include "main/enums.h"
#include "main/mtypes.h"
#include "main/macros.h"
#include "main/image.h"
#include "main/bufferobj.h"
#include "main/state.h"
#include "swrast/swrast.h"
#include "intel_screen.h"
#include "intel_context.h"
#include "intel_blit.h"
#include "intel_buffers.h"
#include "intel_regions.h"
#include "intel_pixel.h"
#include "intel_buffer_objects.h"
/* For many applications, the new ability to pull the source buffers
* back out of the GTT and then do the packing/conversion operations
* in software will be as much of an improvement as trying to get the
* blitter and/or texture engine to do the work.
*
* This step is gated on private backbuffers.
*
* Obviously the frontbuffer can't be pulled back, so that is either
* an argument for blit/texture readpixels, or for blitting to a
* temporary and then pulling that back.
*
* When the destination is a pbo, however, it's not clear if it is
* ever going to be pulled to main memory (though the access param
* will be a good hint). So it sounds like we do want to be able to
* choose between blit/texture implementation on the gpu and pullback
* and cpu-based copying.
*
* Unless you can magically turn client memory into a PBO for the
* duration of this call, there will be a cpu-based copying step in
* any case.
*/
static GLboolean
do_blit_readpixels(GLcontext * ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
{
struct intel_context *intel = intel_context(ctx);
struct intel_region *src = intel_readbuf_region(intel);
struct intel_buffer_object *dst = intel_buffer_object(pack->BufferObj);
GLuint dst_offset;
GLuint rowLength;
drm_intel_bo *dst_buffer;
GLboolean all;
GLint dst_x, dst_y;
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s\n", __FUNCTION__);
if (!src)
return GL_FALSE;
if (!_mesa_is_bufferobj(pack->BufferObj)) {
/* PBO only for now:
*/
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s - not PBO\n", __FUNCTION__);
return GL_FALSE;
}
if (ctx->_ImageTransferState ||
!intel_check_blit_format(src, format, type)) {
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s - bad format for blit\n", __FUNCTION__);
return GL_FALSE;
}
if (pack->Alignment != 1 || pack->SwapBytes || pack->LsbFirst) {
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s: bad packing params\n", __FUNCTION__);
return GL_FALSE;
}
if (pack->RowLength > 0)
rowLength = pack->RowLength;
else
rowLength = width;
if (pack->Invert) {
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s: MESA_PACK_INVERT not done yet\n", __FUNCTION__);
return GL_FALSE;
}
else {
if (ctx->ReadBuffer->Name == 0)
rowLength = -rowLength;
}
dst_offset = (GLintptr) _mesa_image_address(2, pack, pixels, width, height,
format, type, 0, 0, 0);
if (!_mesa_clip_copytexsubimage(ctx,
&dst_x, &dst_y,
&x, &y,
&width, &height)) {
return GL_TRUE;
}
intel_prepare_render(intel);
all = (width * height * src->cpp == dst->Base.Size &&
x == 0 && dst_offset == 0);
dst_x = 0;
dst_y = 0;
dst_buffer = intel_bufferobj_buffer(intel, dst,
all ? INTEL_WRITE_FULL :
INTEL_WRITE_PART);
if (ctx->ReadBuffer->Name == 0)
y = ctx->ReadBuffer->Height - (y + height);
if (!intelEmitCopyBlit(intel,
src->cpp,
src->pitch, src->buffer, 0, src->tiling,
rowLength, dst_buffer, dst_offset, GL_FALSE,
x, y,
dst_x, dst_y,
width, height,
GL_COPY)) {
return GL_FALSE;
}
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s - DONE\n", __FUNCTION__);
return GL_TRUE;
}
void
intelReadPixels(GLcontext * ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
{
struct intel_context *intel = intel_context(ctx);
GLboolean dirty;
if (INTEL_DEBUG & DEBUG_PIXEL)
fprintf(stderr, "%s\n", __FUNCTION__);
intelFlush(ctx);
/* glReadPixels() wont dirty the front buffer, so reset the dirty
* flag after calling intel_prepare_render(). */
dirty = intel->front_buffer_dirty;
intel_prepare_render(intel);
intel->front_buffer_dirty = dirty;
if (do_blit_readpixels
(ctx, x, y, width, height, format, type, pack, pixels))
return;
if (INTEL_DEBUG & DEBUG_PIXEL)
printf("%s: fallback to swrast\n", __FUNCTION__);
/* Update Mesa state before calling down into _swrast_ReadPixels, as
* the spans code requires the computed buffer states to be up to date,
* but _swrast_ReadPixels only updates Mesa state after setting up
* the spans code.
*/
if (ctx->NewState)
_mesa_update_state(ctx);
_swrast_ReadPixels(ctx, x, y, width, height, format, type, pack, pixels);
/* There's an intel_prepare_render() call in intelSpanRenderStart(). */
intel->front_buffer_dirty = dirty;
}
|
