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_blit.h"
  40 #include "st_cb_fbo.h"
  41 #include "st_atom.h"
  42
  43 #include "util/u_format.h"
  44
  45
  46 static void
  47 st_adjust_blit_for_msaa_resolve(struct pipe_blit_info *blit)
  48 {
  49    /* Even though we do multisample resolves at the time of the blit, OpenGL
  50     * specification defines them as if they happen at the time of rendering,
  51     * which means that the type of averaging we do during the resolve should
  52     * only depend on the source format; the destination format should be
  53     * ignored. But, specification doesn't seem to be strict about it.
  54     *
  55     * It has been observed that mulitisample resolves produce slightly better
  56     * looking images when averaging is done using destination format. NVIDIA's
  57     * proprietary OpenGL driver also follows this approach.
  58     *
  59     * When multisampling, if the source and destination formats are equal
  60     * (aside from the color space), we choose to blit in sRGB space to get
  61     * this higher quality image.
  62     */
  63    if (blit->src.resource->nr_samples > 1 &&
  64        blit->dst.resource->nr_samples <= 1) {
  65       blit->dst.format = blit->dst.resource->format;
  66
  67       if (util_format_is_srgb(blit->dst.resource->format))
  68          blit->src.format = util_format_srgb(blit->src.resource->format);
  69       else
  70          blit->src.format = util_format_linear(blit->src.resource->format);
  71    }
  72 }
  73
  74 static void
  75 st_BlitFramebuffer(struct gl_context *ctx,
  76                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
  77                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
  78                    GLbitfield mask, GLenum filter)
  79 {
  80    const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
  81                                     GL_STENCIL_BUFFER_BIT);
  82    struct st_context *st = st_context(ctx);
  83    const uint pFilter = ((filter == GL_NEAREST)
  84                          ? PIPE_TEX_FILTER_NEAREST
  85                          : PIPE_TEX_FILTER_LINEAR);
  86    struct gl_framebuffer *readFB = ctx->ReadBuffer;
  87    struct gl_framebuffer *drawFB = ctx->DrawBuffer;
  88    struct {
  89       GLint srcX0, srcY0, srcX1, srcY1;
  90       GLint dstX0, dstY0, dstX1, dstY1;
  91    } clip;
  92    struct pipe_blit_info blit;
  93
  94    st_validate_state(st);
  95
  96    clip.srcX0 = srcX0;
  97    clip.srcY0 = srcY0;
  98    clip.srcX1 = srcX1;
  99    clip.srcY1 = srcY1;
 100    clip.dstX0 = dstX0;
 101    clip.dstY0 = dstY0;
 102    clip.dstX1 = dstX1;
 103    clip.dstY1 = dstY1;
 104
 105    /* NOTE: If the src and dst dimensions don't match, we cannot simply adjust
 106     * the integer coordinates to account for clipping (or scissors) because that
 107     * would make us cut off fractional parts, affecting the result of the blit.
 108     *
 109     * XXX: This should depend on mask !
 110     */
 111    if (!_mesa_clip_blit(ctx,
 112                         &clip.srcX0, &clip.srcY0, &clip.srcX1, &clip.srcY1,
 113                         &clip.dstX0, &clip.dstY0, &clip.dstX1, &clip.dstY1)) {
 114       return; /* nothing to draw/blit */
 115    }
 116    blit.scissor_enable =
 117       (dstX0 != clip.dstX0) ||
 118       (dstY0 != clip.dstY0) ||
 119       (dstX1 != clip.dstX1) ||
 120       (dstY1 != clip.dstY1);
 121
 122    if (st_fb_orientation(drawFB) == Y_0_TOP) {
 123       /* invert Y for dest */
 124       dstY0 = drawFB->Height - dstY0;
 125       dstY1 = drawFB->Height - dstY1;
 126       /* invert Y for clip */
 127       clip.dstY0 = drawFB->Height - clip.dstY0;
 128       clip.dstY1 = drawFB->Height - clip.dstY1;
 129    }
 130    if (blit.scissor_enable) {
 131       blit.scissor.minx = MIN2(clip.dstX0, clip.dstX1);
 132       blit.scissor.miny = MIN2(clip.dstY0, clip.dstY1);
 133       blit.scissor.maxx = MAX2(clip.dstX0, clip.dstX1);
 134       blit.scissor.maxy = MAX2(clip.dstY0, clip.dstY1);
 135 #if 0
 136       debug_printf("scissor = (%i,%i)-(%i,%i)\n",
 137                    blit.scissor.minx,blit.scissor.miny,
 138                    blit.scissor.maxx,blit.scissor.maxy);
 139 #endif
 140    }
 141
 142    if (st_fb_orientation(readFB) == Y_0_TOP) {
 143       /* invert Y for src */
 144       srcY0 = readFB->Height - srcY0;
 145       srcY1 = readFB->Height - srcY1;
 146    }
 147
 148    if (srcY0 > srcY1 && dstY0 > dstY1) {
 149       /* Both src and dst are upside down.  Swap Y to make it
 150        * right-side up to increase odds of using a fast path.
 151        * Recall that all Gallium raster coords have Y=0=top.
 152        */
 153       GLint tmp;
 154       tmp = srcY0;
 155       srcY0 = srcY1;
 156       srcY1 = tmp;
 157       tmp = dstY0;
 158       dstY0 = dstY1;
 159       dstY1 = tmp;
 160    }
 161
 162    blit.src.box.depth = 1;
 163    blit.dst.box.depth = 1;
 164
 165    /* Destination dimensions have to be positive: */
 166    if (dstX0 < dstX1) {
 167       blit.dst.box.x = dstX0;
 168       blit.src.box.x = srcX0;
 169       blit.dst.box.width = dstX1 - dstX0;
 170       blit.src.box.width = srcX1 - srcX0;
 171    } else {
 172       blit.dst.box.x = dstX1;
 173       blit.src.box.x = srcX1;
 174       blit.dst.box.width = dstX0 - dstX1;
 175       blit.src.box.width = srcX0 - srcX1;
 176    }
 177    if (dstY0 < dstY1) {
 178       blit.dst.box.y = dstY0;
 179       blit.src.box.y = srcY0;
 180       blit.dst.box.height = dstY1 - dstY0;
 181       blit.src.box.height = srcY1 - srcY0;
 182    } else {
 183       blit.dst.box.y = dstY1;
 184       blit.src.box.y = srcY1;
 185       blit.dst.box.height = dstY0 - dstY1;
 186       blit.src.box.height = srcY0 - srcY1;
 187    }
 188
 189    blit.filter = pFilter;
 190
 191    if (mask & GL_COLOR_BUFFER_BIT) {
 192       struct gl_renderbuffer_attachment *srcAtt =
 193          &readFB->Attachment[readFB->_ColorReadBufferIndex];
 194
 195       blit.mask = PIPE_MASK_RGBA;
 196
 197       if (srcAtt->Type == GL_TEXTURE) {
 198          struct st_texture_object *srcObj = st_texture_object(srcAtt->Texture);
 199          GLuint i;
 200
 201          if (!srcObj || !srcObj->pt) {
 202             return;
 203          }
 204
 205          for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
 206             struct st_renderbuffer *dstRb =
 207                st_renderbuffer(drawFB->_ColorDrawBuffers[i]);
 208
 209             if (dstRb) {
 210                struct pipe_surface *dstSurf = dstRb->surface;
 211
 212                if (dstSurf) {
 213                   blit.dst.resource = dstSurf->texture;
 214                   blit.dst.level = dstSurf->u.tex.level;
 215                   blit.dst.box.z = dstSurf->u.tex.first_layer;
 216                   blit.dst.format = util_format_linear(dstSurf->format);
 217
 218                   blit.src.resource = srcObj->pt;
 219                   blit.src.level = srcAtt->TextureLevel;
 220                   blit.src.box.z = srcAtt->Zoffset + srcAtt->CubeMapFace;
 221                   blit.src.format = util_format_linear(srcObj->pt->format);
 222
 223                   st_adjust_blit_for_msaa_resolve(&blit);
 224
 225                   st->pipe->blit(st->pipe, &blit);
 226                }
 227             }
 228          }
 229       }
 230       else {
 231          struct st_renderbuffer *srcRb =
 232             st_renderbuffer(readFB->_ColorReadBuffer);
 233          struct pipe_surface *srcSurf;
 234          GLuint i;
 235
 236          if (!srcRb || !srcRb->surface) {
 237             return;
 238          }
 239
 240          srcSurf = srcRb->surface;
 241
 242          for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
 243             struct st_renderbuffer *dstRb =
 244                st_renderbuffer(drawFB->_ColorDrawBuffers[i]);
 245
 246             if (dstRb) {
 247                struct pipe_surface *dstSurf = dstRb->surface;
 248
 249                if (dstSurf) {
 250                   blit.dst.resource = dstSurf->texture;
 251                   blit.dst.level = dstSurf->u.tex.level;
 252                   blit.dst.box.z = dstSurf->u.tex.first_layer;
 253                   blit.dst.format = util_format_linear(dstSurf->format);
 254
 255                   blit.src.resource = srcSurf->texture;
 256                   blit.src.level = srcSurf->u.tex.level;
 257                   blit.src.box.z = srcSurf->u.tex.first_layer;
 258                   blit.src.format = util_format_linear(srcSurf->format);
 259
 260                   st_adjust_blit_for_msaa_resolve(&blit);
 261
 262                   st->pipe->blit(st->pipe, &blit);
 263                }
 264             }
 265          }
 266       }
 267    }
 268
 269    if (mask & depthStencil) {
 270       /* depth and/or stencil blit */
 271
 272       /* get src/dst depth surfaces */
 273       struct st_renderbuffer *srcDepthRb =
 274          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 275       struct st_renderbuffer *dstDepthRb =
 276          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 277       struct pipe_surface *dstDepthSurf =
 278          dstDepthRb ? dstDepthRb->surface : NULL;
 279
 280       struct st_renderbuffer *srcStencilRb =
 281          st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 282       struct st_renderbuffer *dstStencilRb =
 283          st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 284       struct pipe_surface *dstStencilSurf =
 285          dstStencilRb ? dstStencilRb->surface : NULL;
 286
 287       if (_mesa_has_depthstencil_combined(readFB) &&
 288           _mesa_has_depthstencil_combined(drawFB)) {
 289          blit.mask = 0;
 290          if (mask & GL_DEPTH_BUFFER_BIT)
 291             blit.mask |= PIPE_MASK_Z;
 292          if (mask & GL_STENCIL_BUFFER_BIT)
 293             blit.mask |= PIPE_MASK_S;
 294
 295          blit.dst.resource = dstDepthSurf->texture;
 296          blit.dst.level = dstDepthSurf->u.tex.level;
 297          blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
 298          blit.dst.format = dstDepthSurf->format;
 299
 300          blit.src.resource = srcDepthRb->texture;
 301          blit.src.level = srcDepthRb->surface->u.tex.level;
 302          blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
 303          blit.src.format = srcDepthRb->surface->format;
 304
 305          st->pipe->blit(st->pipe, &blit);
 306       }
 307       else {
 308          /* blitting depth and stencil separately */
 309
 310          if (mask & GL_DEPTH_BUFFER_BIT) {
 311             blit.mask = PIPE_MASK_Z;
 312
 313             blit.dst.resource = dstDepthSurf->texture;
 314             blit.dst.level = dstDepthSurf->u.tex.level;
 315             blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
 316             blit.dst.format = dstDepthSurf->format;
 317
 318             blit.src.resource = srcDepthRb->texture;
 319             blit.src.level = srcDepthRb->surface->u.tex.level;
 320             blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
 321             blit.src.format = srcDepthRb->surface->format;
 322
 323             st->pipe->blit(st->pipe, &blit);
 324          }
 325
 326          if (mask & GL_STENCIL_BUFFER_BIT) {
 327             blit.mask = PIPE_MASK_S;
 328
 329             blit.dst.resource = dstStencilSurf->texture;
 330             blit.dst.level = dstStencilSurf->u.tex.level;
 331             blit.dst.box.z = dstStencilSurf->u.tex.first_layer;
 332             blit.dst.format = dstStencilSurf->format;
 333
 334             blit.src.resource = srcStencilRb->texture;
 335             blit.src.level = srcStencilRb->surface->u.tex.level;
 336             blit.src.box.z = srcStencilRb->surface->u.tex.first_layer;
 337             blit.src.format = srcStencilRb->surface->format;
 338
 339             st->pipe->blit(st->pipe, &blit);
 340          }
 341       }
 342    }
 343 }
 344
 345
 346 void
 347 st_init_blit_functions(struct dd_function_table *functions)
 348 {
 349    functions->BlitFramebuffer = st_BlitFramebuffer;
 350 }