src/mesa/state_tracker/st_cb_blit.c

   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_atom.h"
  43
  44 #include "util/u_format.h"
  45
  46
  47 static void
  48 st_adjust_blit_for_msaa_resolve(struct pipe_blit_info *blit)
  49 {
  50    /* Even though we do multisample resolves at the time of the blit, OpenGL
  51     * specification defines them as if they happen at the time of rendering,
  52     * which means that the type of averaging we do during the resolve should
  53     * only depend on the source format; the destination format should be
  54     * ignored. But, specification doesn't seem to be strict about it.
  55     *
  56     * It has been observed that mulitisample resolves produce slightly better
  57     * looking images when averaging is done using destination format. NVIDIA's
  58     * proprietary OpenGL driver also follows this approach.
  59     *
  60     * When multisampling, if the source and destination formats are equal
  61     * (aside from the color space), we choose to blit in sRGB space to get
  62     * this higher quality image.
  63     */
  64    if (blit->src.resource->nr_samples > 1 &&
  65        blit->dst.resource->nr_samples <= 1) {
  66       blit->dst.format = blit->dst.resource->format;
  67
  68       if (util_format_is_srgb(blit->dst.resource->format))
  69          blit->src.format = util_format_srgb(blit->src.resource->format);
  70       else
  71          blit->src.format = util_format_linear(blit->src.resource->format);
  72    }
  73 }
  74
  75 static void
  76 st_BlitFramebuffer(struct gl_context *ctx,
  77                    struct gl_framebuffer *readFB,
  78                    struct gl_framebuffer *drawFB,
  79                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
  80                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
  81                    GLbitfield mask, GLenum filter)
  82 {
  83    const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
  84                                     GL_STENCIL_BUFFER_BIT);
  85    struct st_context *st = st_context(ctx);
  86    const uint pFilter = ((filter == GL_NEAREST)
  87                          ? PIPE_TEX_FILTER_NEAREST
  88                          : PIPE_TEX_FILTER_LINEAR);
  89    struct {
  90       GLint srcX0, srcY0, srcX1, srcY1;
  91       GLint dstX0, dstY0, dstX1, dstY1;
  92    } clip;
  93    struct pipe_blit_info blit;
  94
  95    st_validate_state(st);
  96
  97    /* Make sure bitmap rendering has landed in the framebuffers */
  98    st_flush_bitmap_cache(st);
  99
 100    clip.srcX0 = srcX0;
 101    clip.srcY0 = srcY0;
 102    clip.srcX1 = srcX1;
 103    clip.srcY1 = srcY1;
 104    clip.dstX0 = dstX0;
 105    clip.dstY0 = dstY0;
 106    clip.dstX1 = dstX1;
 107    clip.dstY1 = dstY1;
 108
 109    /* NOTE: If the src and dst dimensions don't match, we cannot simply adjust
 110     * the integer coordinates to account for clipping (or scissors) because that
 111     * would make us cut off fractional parts, affecting the result of the blit.
 112     *
 113     * XXX: This should depend on mask !
 114     */
 115    if (!_mesa_clip_blit(ctx, readFB, drawFB,
 116                         &clip.srcX0, &clip.srcY0, &clip.srcX1, &clip.srcY1,
 117                         &clip.dstX0, &clip.dstY0, &clip.dstX1, &clip.dstY1)) {
 118       return; /* nothing to draw/blit */
 119    }
 120    blit.scissor_enable =
 121       (dstX0 != clip.dstX0) ||
 122       (dstY0 != clip.dstY0) ||
 123       (dstX1 != clip.dstX1) ||
 124       (dstY1 != clip.dstY1);
 125
 126    if (st_fb_orientation(drawFB) == Y_0_TOP) {
 127       /* invert Y for dest */
 128       dstY0 = drawFB->Height - dstY0;
 129       dstY1 = drawFB->Height - dstY1;
 130       /* invert Y for clip */
 131       clip.dstY0 = drawFB->Height - clip.dstY0;
 132       clip.dstY1 = drawFB->Height - clip.dstY1;
 133    }
 134    if (blit.scissor_enable) {
 135       blit.scissor.minx = MIN2(clip.dstX0, clip.dstX1);
 136       blit.scissor.miny = MIN2(clip.dstY0, clip.dstY1);
 137       blit.scissor.maxx = MAX2(clip.dstX0, clip.dstX1);
 138       blit.scissor.maxy = MAX2(clip.dstY0, clip.dstY1);
 139 #if 0
 140       debug_printf("scissor = (%i,%i)-(%i,%i)\n",
 141                    blit.scissor.minx,blit.scissor.miny,
 142                    blit.scissor.maxx,blit.scissor.maxy);
 143 #endif
 144    }
 145
 146    if (st_fb_orientation(readFB) == Y_0_TOP) {
 147       /* invert Y for src */
 148       srcY0 = readFB->Height - srcY0;
 149       srcY1 = readFB->Height - srcY1;
 150    }
 151
 152    if (srcY0 > srcY1 && dstY0 > dstY1) {
 153       /* Both src and dst are upside down.  Swap Y to make it
 154        * right-side up to increase odds of using a fast path.
 155        * Recall that all Gallium raster coords have Y=0=top.
 156        */
 157       GLint tmp;
 158       tmp = srcY0;
 159       srcY0 = srcY1;
 160       srcY1 = tmp;
 161       tmp = dstY0;
 162       dstY0 = dstY1;
 163       dstY1 = tmp;
 164    }
 165
 166    blit.src.box.depth = 1;
 167    blit.dst.box.depth = 1;
 168
 169    /* Destination dimensions have to be positive: */
 170    if (dstX0 < dstX1) {
 171       blit.dst.box.x = dstX0;
 172       blit.src.box.x = srcX0;
 173       blit.dst.box.width = dstX1 - dstX0;
 174       blit.src.box.width = srcX1 - srcX0;
 175    } else {
 176       blit.dst.box.x = dstX1;
 177       blit.src.box.x = srcX1;
 178       blit.dst.box.width = dstX0 - dstX1;
 179       blit.src.box.width = srcX0 - srcX1;
 180    }
 181    if (dstY0 < dstY1) {
 182       blit.dst.box.y = dstY0;
 183       blit.src.box.y = srcY0;
 184       blit.dst.box.height = dstY1 - dstY0;
 185       blit.src.box.height = srcY1 - srcY0;
 186    } else {
 187       blit.dst.box.y = dstY1;
 188       blit.src.box.y = srcY1;
 189       blit.dst.box.height = dstY0 - dstY1;
 190       blit.src.box.height = srcY0 - srcY1;
 191    }
 192
 193    blit.filter = pFilter;
 194    blit.render_condition_enable = TRUE;
 195
 196    if (mask & GL_COLOR_BUFFER_BIT) {
 197       struct gl_renderbuffer_attachment *srcAtt =
 198          &readFB->Attachment[readFB->_ColorReadBufferIndex];
 199
 200       blit.mask = PIPE_MASK_RGBA;
 201
 202       if (srcAtt->Type == GL_TEXTURE) {
 203          struct st_texture_object *srcObj = st_texture_object(srcAtt->Texture);
 204          GLuint i;
 205
 206          if (!srcObj || !srcObj->pt) {
 207             return;
 208          }
 209
 210          for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
 211             struct st_renderbuffer *dstRb =
 212                st_renderbuffer(drawFB->_ColorDrawBuffers[i]);
 213
 214             if (dstRb) {
 215                struct pipe_surface *dstSurf = dstRb->surface;
 216
 217                if (dstSurf) {
 218                   blit.dst.resource = dstSurf->texture;
 219                   blit.dst.level = dstSurf->u.tex.level;
 220                   blit.dst.box.z = dstSurf->u.tex.first_layer;
 221                   blit.dst.format = util_format_linear(dstSurf->format);
 222
 223                   blit.src.resource = srcObj->pt;
 224                   blit.src.level = srcAtt->TextureLevel;
 225                   blit.src.box.z = srcAtt->Zoffset + srcAtt->CubeMapFace;
 226                   blit.src.format = util_format_linear(srcObj->pt->format);
 227
 228                   st_adjust_blit_for_msaa_resolve(&blit);
 229
 230                   st->pipe->blit(st->pipe, &blit);
 231                }
 232             }
 233          }
 234       }
 235       else {
 236          struct st_renderbuffer *srcRb =
 237             st_renderbuffer(readFB->_ColorReadBuffer);
 238          struct pipe_surface *srcSurf;
 239          GLuint i;
 240
 241          if (!srcRb || !srcRb->surface) {
 242             return;
 243          }
 244
 245          srcSurf = srcRb->surface;
 246
 247          for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
 248             struct st_renderbuffer *dstRb =
 249                st_renderbuffer(drawFB->_ColorDrawBuffers[i]);
 250
 251             if (dstRb) {
 252                struct pipe_surface *dstSurf = dstRb->surface;
 253
 254                if (dstSurf) {
 255                   blit.dst.resource = dstSurf->texture;
 256                   blit.dst.level = dstSurf->u.tex.level;
 257                   blit.dst.box.z = dstSurf->u.tex.first_layer;
 258                   blit.dst.format = util_format_linear(dstSurf->format);
 259
 260                   blit.src.resource = srcSurf->texture;
 261                   blit.src.level = srcSurf->u.tex.level;
 262                   blit.src.box.z = srcSurf->u.tex.first_layer;
 263                   blit.src.format = util_format_linear(srcSurf->format);
 264
 265                   st_adjust_blit_for_msaa_resolve(&blit);
 266
 267                   st->pipe->blit(st->pipe, &blit);
 268                }
 269             }
 270          }
 271       }
 272    }
 273
 274    if (mask & depthStencil) {
 275       /* depth and/or stencil blit */
 276
 277       /* get src/dst depth surfaces */
 278       struct st_renderbuffer *srcDepthRb =
 279          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 280       struct st_renderbuffer *dstDepthRb =
 281          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 282       struct pipe_surface *dstDepthSurf =
 283          dstDepthRb ? dstDepthRb->surface : NULL;
 284
 285       struct st_renderbuffer *srcStencilRb =
 286          st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 287       struct st_renderbuffer *dstStencilRb =
 288          st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 289       struct pipe_surface *dstStencilSurf =
 290          dstStencilRb ? dstStencilRb->surface : NULL;
 291
 292       if (_mesa_has_depthstencil_combined(readFB) &&
 293           _mesa_has_depthstencil_combined(drawFB)) {
 294          blit.mask = 0;
 295          if (mask & GL_DEPTH_BUFFER_BIT)
 296             blit.mask |= PIPE_MASK_Z;
 297          if (mask & GL_STENCIL_BUFFER_BIT)
 298             blit.mask |= PIPE_MASK_S;
 299
 300          blit.dst.resource = dstDepthSurf->texture;
 301          blit.dst.level = dstDepthSurf->u.tex.level;
 302          blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
 303          blit.dst.format = dstDepthSurf->format;
 304
 305          blit.src.resource = srcDepthRb->texture;
 306          blit.src.level = srcDepthRb->surface->u.tex.level;
 307          blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
 308          blit.src.format = srcDepthRb->surface->format;
 309
 310          st->pipe->blit(st->pipe, &blit);
 311       }
 312       else {
 313          /* blitting depth and stencil separately */
 314
 315          if (mask & GL_DEPTH_BUFFER_BIT) {
 316             blit.mask = PIPE_MASK_Z;
 317
 318             blit.dst.resource = dstDepthSurf->texture;
 319             blit.dst.level = dstDepthSurf->u.tex.level;
 320             blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
 321             blit.dst.format = dstDepthSurf->format;
 322
 323             blit.src.resource = srcDepthRb->texture;
 324             blit.src.level = srcDepthRb->surface->u.tex.level;
 325             blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
 326             blit.src.format = srcDepthRb->surface->format;
 327
 328             st->pipe->blit(st->pipe, &blit);
 329          }
 330
 331          if (mask & GL_STENCIL_BUFFER_BIT) {
 332             blit.mask = PIPE_MASK_S;
 333
 334             blit.dst.resource = dstStencilSurf->texture;
 335             blit.dst.level = dstStencilSurf->u.tex.level;
 336             blit.dst.box.z = dstStencilSurf->u.tex.first_layer;
 337             blit.dst.format = dstStencilSurf->format;
 338
 339             blit.src.resource = srcStencilRb->texture;
 340             blit.src.level = srcStencilRb->surface->u.tex.level;
 341             blit.src.box.z = srcStencilRb->surface->u.tex.first_layer;
 342             blit.src.format = srcStencilRb->surface->format;
 343
 344             st->pipe->blit(st->pipe, &blit);
 345          }
 346       }
 347    }
 348 }
 349
 350
 351 void
 352 st_init_blit_functions(struct dd_function_table *functions)
 353 {
 354    functions->BlitFramebuffer = st_BlitFramebuffer;
 355 }