1 /**************************************************************************
2 *
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
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:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
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.
25 *
26 **************************************************************************/
27
28 #include "main/glheader.h"
29 #include "main/image.h"
30 #include "main/state.h"
31 #include "main/mtypes.h"
32 #include "main/condrender.h"
33 #include "main/fbobject.h"
34 #include "drivers/common/meta.h"
35
36 #include "intel_context.h"
37 #include "intel_buffers.h"
38 #include "intel_mipmap_tree.h"
39 #include "intel_regions.h"
40 #include "intel_pixel.h"
41 #include "intel_fbo.h"
42
43 #define FILE_DEBUG_FLAG DEBUG_PIXEL
44
45 /**
46 * Check if any fragment operations are in effect which might effect
47 * glCopyPixels. Differs from intel_check_blit_fragment_ops in that
48 * we allow Scissor.
49 */
50 static bool
intel_check_copypixel_blit_fragment_ops(struct gl_context * ctx)51 intel_check_copypixel_blit_fragment_ops(struct gl_context * ctx)
52 {
53 if (ctx->NewState)
54 _mesa_update_state(ctx);
55
56 /* Could do logicop with the blitter:
57 */
58 return !(ctx->_ImageTransferState ||
59 ctx->Color.AlphaEnabled ||
60 ctx->Depth.Test ||
61 ctx->Fog.Enabled ||
62 ctx->Stencil._Enabled ||
63 !ctx->Color.ColorMask[0][0] ||
64 !ctx->Color.ColorMask[0][1] ||
65 !ctx->Color.ColorMask[0][2] ||
66 !ctx->Color.ColorMask[0][3] ||
67 ctx->Texture._EnabledUnits ||
68 ctx->FragmentProgram._Enabled ||
69 ctx->Color.BlendEnabled);
70 }
71
72
73 /**
74 * CopyPixels with the blitter. Don't support zooming, pixel transfer, etc.
75 */
76 static bool
do_blit_copypixels(struct gl_context * ctx,GLint srcx,GLint srcy,GLsizei width,GLsizei height,GLint dstx,GLint dsty,GLenum type)77 do_blit_copypixels(struct gl_context * ctx,
78 GLint srcx, GLint srcy,
79 GLsizei width, GLsizei height,
80 GLint dstx, GLint dsty, GLenum type)
81 {
82 struct intel_context *intel = intel_context(ctx);
83 struct gl_framebuffer *fb = ctx->DrawBuffer;
84 struct gl_framebuffer *read_fb = ctx->ReadBuffer;
85 GLint orig_dstx;
86 GLint orig_dsty;
87 GLint orig_srcx;
88 GLint orig_srcy;
89 bool flip = false;
90 struct intel_renderbuffer *draw_irb = NULL;
91 struct intel_renderbuffer *read_irb = NULL;
92 gl_format read_format, draw_format;
93
94 /* Update draw buffer bounds */
95 _mesa_update_state(ctx);
96
97 switch (type) {
98 case GL_COLOR:
99 if (fb->_NumColorDrawBuffers != 1) {
100 fallback_debug("glCopyPixels() fallback: MRT\n");
101 return false;
102 }
103
104 draw_irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
105 read_irb = intel_renderbuffer(read_fb->_ColorReadBuffer);
106 break;
107 case GL_DEPTH_STENCIL_EXT:
108 draw_irb = intel_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
109 read_irb =
110 intel_renderbuffer(read_fb->Attachment[BUFFER_DEPTH].Renderbuffer);
111 break;
112 case GL_DEPTH:
113 fallback_debug("glCopyPixels() fallback: GL_DEPTH\n");
114 return false;
115 case GL_STENCIL:
116 fallback_debug("glCopyPixels() fallback: GL_STENCIL\n");
117 return false;
118 default:
119 fallback_debug("glCopyPixels(): Unknown type\n");
120 return false;
121 }
122
123 if (!draw_irb) {
124 fallback_debug("glCopyPixels() fallback: missing draw buffer\n");
125 return false;
126 }
127
128 if (!read_irb) {
129 fallback_debug("glCopyPixels() fallback: missing read buffer\n");
130 return false;
131 }
132
133 read_format = intel_rb_format(read_irb);
134 draw_format = intel_rb_format(draw_irb);
135
136 if (draw_format != read_format &&
137 !(draw_format == MESA_FORMAT_XRGB8888 &&
138 read_format == MESA_FORMAT_ARGB8888)) {
139 fallback_debug("glCopyPixels() fallback: mismatched formats (%s -> %s\n",
140 _mesa_get_format_name(read_format),
141 _mesa_get_format_name(draw_format));
142 return false;
143 }
144
145 /* Copypixels can be more than a straight copy. Ensure all the
146 * extra operations are disabled:
147 */
148 if (!intel_check_copypixel_blit_fragment_ops(ctx) ||
149 ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F)
150 return false;
151
152 intel_prepare_render(intel);
153
154 intel_flush(&intel->ctx);
155
156 /* Clip to destination buffer. */
157 orig_dstx = dstx;
158 orig_dsty = dsty;
159 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
160 fb->_Xmax, fb->_Ymax,
161 &dstx, &dsty, &width, &height))
162 goto out;
163 /* Adjust src coords for our post-clipped destination origin */
164 srcx += dstx - orig_dstx;
165 srcy += dsty - orig_dsty;
166
167 /* Clip to source buffer. */
168 orig_srcx = srcx;
169 orig_srcy = srcy;
170 if (!_mesa_clip_to_region(0, 0,
171 read_fb->Width, read_fb->Height,
172 &srcx, &srcy, &width, &height))
173 goto out;
174 /* Adjust dst coords for our post-clipped source origin */
175 dstx += srcx - orig_srcx;
176 dsty += srcy - orig_srcy;
177
178 /* Flip dest Y if it's a window system framebuffer. */
179 if (_mesa_is_winsys_fbo(fb)) {
180 /* copypixels to a window system framebuffer */
181 dsty = fb->Height - dsty - height;
182 flip = !flip;
183 }
184
185 /* Flip source Y if it's a window system framebuffer. */
186 if (_mesa_is_winsys_fbo(read_fb)) {
187 srcy = read_fb->Height - srcy - height;
188 flip = !flip;
189 }
190
191 srcx += read_irb->draw_x;
192 srcy += read_irb->draw_y;
193 dstx += draw_irb->draw_x;
194 dsty += draw_irb->draw_y;
195
196 if (!intel_region_copy(intel,
197 draw_irb->mt->region, 0, dstx, dsty,
198 read_irb->mt->region, 0, srcx, srcy,
199 width, height, flip,
200 ctx->Color.ColorLogicOpEnabled ?
201 ctx->Color.LogicOp : GL_COPY)) {
202 DBG("%s: blit failure\n", __FUNCTION__);
203 return false;
204 }
205
206 out:
207 intel_check_front_buffer_rendering(intel);
208
209 DBG("%s: success\n", __FUNCTION__);
210 return true;
211 }
212
213
214 void
intelCopyPixels(struct gl_context * ctx,GLint srcx,GLint srcy,GLsizei width,GLsizei height,GLint destx,GLint desty,GLenum type)215 intelCopyPixels(struct gl_context * ctx,
216 GLint srcx, GLint srcy,
217 GLsizei width, GLsizei height,
218 GLint destx, GLint desty, GLenum type)
219 {
220 DBG("%s\n", __FUNCTION__);
221
222 if (!_mesa_check_conditional_render(ctx))
223 return;
224
225 if (do_blit_copypixels(ctx, srcx, srcy, width, height, destx, desty, type))
226 return;
227
228 /* this will use swrast if needed */
229 _mesa_meta_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type);
230 }
231