1 /*
2 * Copyright (C) 2010 Maciej Cencora <m.cencora@gmail.com>
3 *
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a 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, sublicense, 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:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial
16 * portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 */
27
28 #include "stdint.h"
29 #include "main/bufferobj.h"
30 #include "main/enums.h"
31 #include "main/fbobject.h"
32 #include "main/image.h"
33 #include "main/readpix.h"
34 #include "main/state.h"
35
36 #include "radeon_common_context.h"
37 #include "radeon_buffer_objects.h"
38 #include "radeon_debug.h"
39 #include "radeon_mipmap_tree.h"
40
gl_format_and_type_to_mesa_format(GLenum format,GLenum type)41 static mesa_format gl_format_and_type_to_mesa_format(GLenum format, GLenum type)
42 {
43 switch (format)
44 {
45 case GL_RGB:
46 switch (type) {
47 case GL_UNSIGNED_SHORT_5_6_5:
48 return MESA_FORMAT_B5G6R5_UNORM;
49 case GL_UNSIGNED_SHORT_5_6_5_REV:
50 return MESA_FORMAT_R5G6B5_UNORM;
51 }
52 break;
53 case GL_RGBA:
54 switch (type) {
55 case GL_FLOAT:
56 return MESA_FORMAT_RGBA_FLOAT32;
57 case GL_UNSIGNED_SHORT_5_5_5_1:
58 return MESA_FORMAT_A1B5G5R5_UNORM;
59 case GL_UNSIGNED_INT_8_8_8_8:
60 return MESA_FORMAT_A8B8G8R8_UNORM;
61 case GL_UNSIGNED_BYTE:
62 case GL_UNSIGNED_INT_8_8_8_8_REV:
63 return MESA_FORMAT_R8G8B8A8_UNORM;
64 }
65 break;
66 case GL_BGRA:
67 switch (type) {
68 case GL_UNSIGNED_SHORT_4_4_4_4:
69 return MESA_FORMAT_A4R4G4B4_UNORM;
70 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
71 return MESA_FORMAT_B4G4R4A4_UNORM;
72 case GL_UNSIGNED_SHORT_5_5_5_1:
73 return MESA_FORMAT_A1R5G5B5_UNORM;
74 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
75 return MESA_FORMAT_B5G5R5A1_UNORM;
76 case GL_UNSIGNED_INT_8_8_8_8:
77 return MESA_FORMAT_A8R8G8B8_UNORM;
78 case GL_UNSIGNED_BYTE:
79 case GL_UNSIGNED_INT_8_8_8_8_REV:
80 return MESA_FORMAT_B8G8R8A8_UNORM;
81
82 }
83 break;
84 }
85
86 return MESA_FORMAT_NONE;
87 }
88
89 static GLboolean
do_blit_readpixels(struct gl_context * ctx,GLint x,GLint y,GLsizei width,GLsizei height,GLenum format,GLenum type,const struct gl_pixelstore_attrib * pack,GLvoid * pixels)90 do_blit_readpixels(struct gl_context * ctx,
91 GLint x, GLint y, GLsizei width, GLsizei height,
92 GLenum format, GLenum type,
93 const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
94 {
95 radeonContextPtr radeon = RADEON_CONTEXT(ctx);
96 const struct radeon_renderbuffer *rrb = radeon_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
97 const mesa_format dst_format = gl_format_and_type_to_mesa_format(format, type);
98 unsigned dst_rowstride, dst_imagesize, aligned_rowstride, flip_y;
99 struct radeon_bo *dst_buffer;
100 GLint dst_x = 0, dst_y = 0;
101 intptr_t dst_offset;
102
103 /* It's not worth if number of pixels to copy is really small */
104 if (width * height < 100) {
105 return GL_FALSE;
106 }
107
108 if (dst_format == MESA_FORMAT_NONE ||
109 !radeon->vtbl.check_blit(dst_format, rrb->pitch / rrb->cpp) || !radeon->vtbl.blit) {
110 return GL_FALSE;
111 }
112
113 if (ctx->_ImageTransferState || ctx->Color.ColorLogicOpEnabled) {
114 return GL_FALSE;
115 }
116
117 if (pack->SwapBytes || pack->LsbFirst) {
118 return GL_FALSE;
119 }
120
121 if (pack->RowLength > 0) {
122 dst_rowstride = pack->RowLength;
123 } else {
124 dst_rowstride = width;
125 }
126
127 if (!_mesa_clip_copytexsubimage(ctx, &dst_x, &dst_y, &x, &y, &width, &height)) {
128 return GL_TRUE;
129 }
130 assert(x >= 0 && y >= 0);
131
132 aligned_rowstride = get_texture_image_row_stride(radeon, dst_format, dst_rowstride, 0, GL_TEXTURE_2D);
133 dst_rowstride *= _mesa_get_format_bytes(dst_format);
134 if (pack->BufferObj && aligned_rowstride != dst_rowstride)
135 return GL_FALSE;
136 dst_imagesize = get_texture_image_size(dst_format,
137 aligned_rowstride,
138 height, 1, 0);
139
140 if (!pack->BufferObj)
141 {
142 dst_buffer = radeon_bo_open(radeon->radeonScreen->bom, 0, dst_imagesize, 1024, RADEON_GEM_DOMAIN_GTT, 0);
143 dst_offset = 0;
144 }
145 else
146 {
147 dst_buffer = get_radeon_buffer_object(pack->BufferObj)->bo;
148 dst_offset = (intptr_t)pixels;
149 }
150
151 /* Disable source Y flipping for FBOs */
152 flip_y = _mesa_is_winsys_fbo(ctx->ReadBuffer);
153 if (pack->Invert) {
154 y = rrb->base.Base.Height - height - y;
155 flip_y = !flip_y;
156 }
157
158 if (radeon->vtbl.blit(ctx,
159 rrb->bo,
160 rrb->draw_offset,
161 rrb->base.Base.Format,
162 rrb->pitch / rrb->cpp,
163 rrb->base.Base.Width,
164 rrb->base.Base.Height,
165 x,
166 y,
167 dst_buffer,
168 dst_offset,
169 dst_format,
170 aligned_rowstride / _mesa_get_format_bytes(dst_format),
171 width,
172 height,
173 0, /* dst_x */
174 0, /* dst_y */
175 width,
176 height,
177 flip_y))
178 {
179 if (!pack->BufferObj)
180 {
181 radeon_bo_map(dst_buffer, 0);
182 copy_rows(pixels, dst_rowstride, dst_buffer->ptr,
183 aligned_rowstride, height, dst_rowstride);
184 radeon_bo_unmap(dst_buffer);
185 radeon_bo_unref(dst_buffer);
186 }
187
188 return GL_TRUE;
189 }
190
191 if (!pack->BufferObj)
192 radeon_bo_unref(dst_buffer);
193
194 return GL_FALSE;
195 }
196
197 void
radeonReadPixels(struct gl_context * ctx,GLint x,GLint y,GLsizei width,GLsizei height,GLenum format,GLenum type,const struct gl_pixelstore_attrib * pack,GLvoid * pixels)198 radeonReadPixels(struct gl_context * ctx,
199 GLint x, GLint y, GLsizei width, GLsizei height,
200 GLenum format, GLenum type,
201 const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
202 {
203 radeonContextPtr radeon = RADEON_CONTEXT(ctx);
204 radeon_prepare_render(radeon);
205
206 if (do_blit_readpixels(ctx, x, y, width, height, format, type, pack, pixels))
207 return;
208
209 /* Update Mesa state before calling _mesa_readpixels().
210 * XXX this may not be needed since ReadPixels no longer uses the
211 * span code.
212 */
213 radeon_print(RADEON_FALLBACKS, RADEON_NORMAL,
214 "Falling back to sw for ReadPixels (format %s, type %s)\n",
215 _mesa_enum_to_string(format), _mesa_enum_to_string(type));
216
217 if (ctx->NewState)
218 _mesa_update_state(ctx);
219
220 _mesa_readpixels(ctx, x, y, width, height, format, type, pack, pixels);
221 }
222