1/**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
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 VMWARE 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 /*
29  * Authors:
30  *   Brian Paul
31  */
32
33#include "main/imports.h"
34#include "main/image.h"
35#include "main/macros.h"
36
37#include "st_context.h"
38#include "st_texture.h"
39#include "st_cb_bitmap.h"
40#include "st_cb_blit.h"
41#include "st_cb_fbo.h"
42#include "st_manager.h"
43#include "st_scissor.h"
44#include "st_util.h"
45
46#include "util/u_format.h"
47
48static void
49st_BlitFramebuffer(struct gl_context *ctx,
50                   struct gl_framebuffer *readFB,
51                   struct gl_framebuffer *drawFB,
52                   GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
53                   GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
54                   GLbitfield mask, GLenum filter)
55{
56   const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
57                                    GL_STENCIL_BUFFER_BIT);
58   struct st_context *st = st_context(ctx);
59   const uint pFilter = ((filter == GL_NEAREST)
60                         ? PIPE_TEX_FILTER_NEAREST
61                         : PIPE_TEX_FILTER_LINEAR);
62   struct {
63      GLint srcX0, srcY0, srcX1, srcY1;
64      GLint dstX0, dstY0, dstX1, dstY1;
65   } clip;
66   struct pipe_blit_info blit;
67
68   st_manager_validate_framebuffers(st);
69
70   /* Make sure bitmap rendering has landed in the framebuffers */
71   st_flush_bitmap_cache(st);
72   st_invalidate_readpix_cache(st);
73
74   clip.srcX0 = srcX0;
75   clip.srcY0 = srcY0;
76   clip.srcX1 = srcX1;
77   clip.srcY1 = srcY1;
78   clip.dstX0 = dstX0;
79   clip.dstY0 = dstY0;
80   clip.dstX1 = dstX1;
81   clip.dstY1 = dstY1;
82
83   /* NOTE: If the src and dst dimensions don't match, we cannot simply adjust
84    * the integer coordinates to account for clipping (or scissors) because that
85    * would make us cut off fractional parts, affecting the result of the blit.
86    *
87    * XXX: This should depend on mask !
88    */
89   if (!_mesa_clip_blit(ctx, readFB, drawFB,
90                        &clip.srcX0, &clip.srcY0, &clip.srcX1, &clip.srcY1,
91                        &clip.dstX0, &clip.dstY0, &clip.dstX1, &clip.dstY1)) {
92      return; /* nothing to draw/blit */
93   }
94   memset(&blit, 0, sizeof(struct pipe_blit_info));
95   blit.scissor_enable =
96      (dstX0 != clip.dstX0) ||
97      (dstY0 != clip.dstY0) ||
98      (dstX1 != clip.dstX1) ||
99      (dstY1 != clip.dstY1);
100
101   if (st_fb_orientation(drawFB) == Y_0_TOP) {
102      /* invert Y for dest */
103      dstY0 = drawFB->Height - dstY0;
104      dstY1 = drawFB->Height - dstY1;
105      /* invert Y for clip */
106      clip.dstY0 = drawFB->Height - clip.dstY0;
107      clip.dstY1 = drawFB->Height - clip.dstY1;
108   }
109   if (blit.scissor_enable) {
110      blit.scissor.minx = MIN2(clip.dstX0, clip.dstX1);
111      blit.scissor.miny = MIN2(clip.dstY0, clip.dstY1);
112      blit.scissor.maxx = MAX2(clip.dstX0, clip.dstX1);
113      blit.scissor.maxy = MAX2(clip.dstY0, clip.dstY1);
114#if 0
115      debug_printf("scissor = (%i,%i)-(%i,%i)\n",
116                   blit.scissor.minx,blit.scissor.miny,
117                   blit.scissor.maxx,blit.scissor.maxy);
118#endif
119   }
120
121   if (st_fb_orientation(readFB) == Y_0_TOP) {
122      /* invert Y for src */
123      srcY0 = readFB->Height - srcY0;
124      srcY1 = readFB->Height - srcY1;
125   }
126
127   if (srcY0 > srcY1 && dstY0 > dstY1) {
128      /* Both src and dst are upside down.  Swap Y to make it
129       * right-side up to increase odds of using a fast path.
130       * Recall that all Gallium raster coords have Y=0=top.
131       */
132      GLint tmp;
133      tmp = srcY0;
134      srcY0 = srcY1;
135      srcY1 = tmp;
136      tmp = dstY0;
137      dstY0 = dstY1;
138      dstY1 = tmp;
139   }
140
141   blit.src.box.depth = 1;
142   blit.dst.box.depth = 1;
143
144   /* Destination dimensions have to be positive: */
145   if (dstX0 < dstX1) {
146      blit.dst.box.x = dstX0;
147      blit.src.box.x = srcX0;
148      blit.dst.box.width = dstX1 - dstX0;
149      blit.src.box.width = srcX1 - srcX0;
150   } else {
151      blit.dst.box.x = dstX1;
152      blit.src.box.x = srcX1;
153      blit.dst.box.width = dstX0 - dstX1;
154      blit.src.box.width = srcX0 - srcX1;
155   }
156   if (dstY0 < dstY1) {
157      blit.dst.box.y = dstY0;
158      blit.src.box.y = srcY0;
159      blit.dst.box.height = dstY1 - dstY0;
160      blit.src.box.height = srcY1 - srcY0;
161   } else {
162      blit.dst.box.y = dstY1;
163      blit.src.box.y = srcY1;
164      blit.dst.box.height = dstY0 - dstY1;
165      blit.src.box.height = srcY0 - srcY1;
166   }
167
168   if (drawFB != ctx->WinSysDrawBuffer)
169      st_window_rectangles_to_blit(ctx, &blit);
170
171   blit.filter = pFilter;
172   blit.render_condition_enable = TRUE;
173   blit.alpha_blend = FALSE;
174
175   if (mask & GL_COLOR_BUFFER_BIT) {
176      struct gl_renderbuffer_attachment *srcAtt =
177         &readFB->Attachment[readFB->_ColorReadBufferIndex];
178      GLuint i;
179
180      blit.mask = PIPE_MASK_RGBA;
181
182      if (srcAtt->Type == GL_TEXTURE) {
183         struct st_texture_object *srcObj = st_texture_object(srcAtt->Texture);
184
185         if (!srcObj || !srcObj->pt) {
186            return;
187         }
188
189         blit.src.resource = srcObj->pt;
190         blit.src.level = srcAtt->TextureLevel;
191         blit.src.box.z = srcAtt->Zoffset + srcAtt->CubeMapFace;
192         blit.src.format = srcObj->pt->format;
193
194         if (!ctx->Color.sRGBEnabled)
195            blit.src.format = util_format_linear(blit.src.format);
196      }
197      else {
198         struct st_renderbuffer *srcRb =
199            st_renderbuffer(readFB->_ColorReadBuffer);
200         struct pipe_surface *srcSurf;
201
202         if (!srcRb)
203            return;
204
205         st_update_renderbuffer_surface(st, srcRb);
206
207         if (!srcRb->surface)
208            return;
209
210         srcSurf = srcRb->surface;
211
212         blit.src.resource = srcSurf->texture;
213         blit.src.level = srcSurf->u.tex.level;
214         blit.src.box.z = srcSurf->u.tex.first_layer;
215         blit.src.format = srcSurf->format;
216      }
217
218      for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
219         struct st_renderbuffer *dstRb =
220            st_renderbuffer(drawFB->_ColorDrawBuffers[i]);
221
222         if (dstRb) {
223            struct pipe_surface *dstSurf;
224
225            st_update_renderbuffer_surface(st, dstRb);
226
227            dstSurf = dstRb->surface;
228
229            if (dstSurf) {
230               blit.dst.resource = dstSurf->texture;
231               blit.dst.level = dstSurf->u.tex.level;
232               blit.dst.box.z = dstSurf->u.tex.first_layer;
233               blit.dst.format = dstSurf->format;
234
235               st->pipe->blit(st->pipe, &blit);
236               dstRb->defined = true; /* front buffer tracking */
237            }
238         }
239      }
240   }
241
242   if (mask & depthStencil) {
243      /* depth and/or stencil blit */
244
245      /* get src/dst depth surfaces */
246      struct st_renderbuffer *srcDepthRb =
247         st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
248      struct st_renderbuffer *dstDepthRb =
249         st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
250      struct pipe_surface *dstDepthSurf =
251         dstDepthRb ? dstDepthRb->surface : NULL;
252
253      struct st_renderbuffer *srcStencilRb =
254         st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
255      struct st_renderbuffer *dstStencilRb =
256         st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
257      struct pipe_surface *dstStencilSurf =
258         dstStencilRb ? dstStencilRb->surface : NULL;
259
260      if (_mesa_has_depthstencil_combined(readFB) &&
261          _mesa_has_depthstencil_combined(drawFB)) {
262         blit.mask = 0;
263         if (mask & GL_DEPTH_BUFFER_BIT)
264            blit.mask |= PIPE_MASK_Z;
265         if (mask & GL_STENCIL_BUFFER_BIT)
266            blit.mask |= PIPE_MASK_S;
267
268         blit.dst.resource = dstDepthSurf->texture;
269         blit.dst.level = dstDepthSurf->u.tex.level;
270         blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
271         blit.dst.format = dstDepthSurf->format;
272
273         blit.src.resource = srcDepthRb->texture;
274         blit.src.level = srcDepthRb->surface->u.tex.level;
275         blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
276         blit.src.format = srcDepthRb->surface->format;
277
278         st->pipe->blit(st->pipe, &blit);
279      }
280      else {
281         /* blitting depth and stencil separately */
282
283         if (mask & GL_DEPTH_BUFFER_BIT) {
284            blit.mask = PIPE_MASK_Z;
285
286            blit.dst.resource = dstDepthSurf->texture;
287            blit.dst.level = dstDepthSurf->u.tex.level;
288            blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
289            blit.dst.format = dstDepthSurf->format;
290
291            blit.src.resource = srcDepthRb->texture;
292            blit.src.level = srcDepthRb->surface->u.tex.level;
293            blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
294            blit.src.format = srcDepthRb->surface->format;
295
296            st->pipe->blit(st->pipe, &blit);
297         }
298
299         if (mask & GL_STENCIL_BUFFER_BIT) {
300            blit.mask = PIPE_MASK_S;
301
302            blit.dst.resource = dstStencilSurf->texture;
303            blit.dst.level = dstStencilSurf->u.tex.level;
304            blit.dst.box.z = dstStencilSurf->u.tex.first_layer;
305            blit.dst.format = dstStencilSurf->format;
306
307            blit.src.resource = srcStencilRb->texture;
308            blit.src.level = srcStencilRb->surface->u.tex.level;
309            blit.src.box.z = srcStencilRb->surface->u.tex.first_layer;
310            blit.src.format = srcStencilRb->surface->format;
311
312            st->pipe->blit(st->pipe, &blit);
313         }
314      }
315   }
316}
317
318
319void
320st_init_blit_functions(struct dd_function_table *functions)
321{
322   functions->BlitFramebuffer = st_BlitFramebuffer;
323}
324