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_manager.h"
  43 #include "st_scissor.h"
  44
  45 #include "util/u_format.h"
  46
  47
  48 static void
  49 st_adjust_blit_for_msaa_resolve(struct pipe_blit_info *blit)
  50 {
  51    /* Even though we do multisample resolves at the time of the blit, OpenGL
  52     * specification defines them as if they happen at the time of rendering,
  53     * which means that the type of averaging we do during the resolve should
  54     * only depend on the source format; the destination format should be
  55     * ignored. But, specification doesn't seem to be strict about it.
  56     *
  57     * It has been observed that mulitisample resolves produce slightly better
  58     * looking images when averaging is done using destination format. NVIDIA's
  59     * proprietary OpenGL driver also follows this approach.
  60     *
  61     * When multisampling, if the source and destination formats are equal
  62     * (aside from the color space), we choose to blit in sRGB space to get
  63     * this higher quality image.
  64     */
  65    if (blit->src.resource->nr_samples > 1 &&
  66        blit->dst.resource->nr_samples <= 1) {
  67       blit->dst.format = blit->dst.resource->format;
  68
  69       if (util_format_is_srgb(blit->dst.resource->format))
  70          blit->src.format = util_format_srgb(blit->src.resource->format);
  71       else
  72          blit->src.format = util_format_linear(blit->src.resource->format);
  73    }
  74 }
  75
  76 static void
  77 st_BlitFramebuffer(struct gl_context *ctx,
  78                    struct gl_framebuffer *readFB,
  79                    struct gl_framebuffer *drawFB,
  80                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
  81                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
  82                    GLbitfield mask, GLenum filter)
  83 {
  84    const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
  85                                     GL_STENCIL_BUFFER_BIT);
  86    struct st_context *st = st_context(ctx);
  87    const uint pFilter = ((filter == GL_NEAREST)
  88                          ? PIPE_TEX_FILTER_NEAREST
  89                          : PIPE_TEX_FILTER_LINEAR);
  90    struct {
  91       GLint srcX0, srcY0, srcX1, srcY1;
  92       GLint dstX0, dstY0, dstX1, dstY1;
  93    } clip;
  94    struct pipe_blit_info blit;
  95
  96    st_manager_validate_framebuffers(st);
  97
  98    /* Make sure bitmap rendering has landed in the framebuffers */
  99    st_flush_bitmap_cache(st);
 100    st_invalidate_readpix_cache(st);
 101
 102    clip.srcX0 = srcX0;
 103    clip.srcY0 = srcY0;
 104    clip.srcX1 = srcX1;
 105    clip.srcY1 = srcY1;
 106    clip.dstX0 = dstX0;
 107    clip.dstY0 = dstY0;
 108    clip.dstX1 = dstX1;
 109    clip.dstY1 = dstY1;
 110
 111    /* NOTE: If the src and dst dimensions don't match, we cannot simply adjust
 112     * the integer coordinates to account for clipping (or scissors) because that
 113     * would make us cut off fractional parts, affecting the result of the blit.
 114     *
 115     * XXX: This should depend on mask !
 116     */
 117    if (!_mesa_clip_blit(ctx, readFB, drawFB,
 118                         &clip.srcX0, &clip.srcY0, &clip.srcX1, &clip.srcY1,
 119                         &clip.dstX0, &clip.dstY0, &clip.dstX1, &clip.dstY1)) {
 120       return; /* nothing to draw/blit */
 121    }
 122    memset(&blit, 0, sizeof(struct pipe_blit_info));
 123    blit.scissor_enable =
 124       (dstX0 != clip.dstX0) ||
 125       (dstY0 != clip.dstY0) ||
 126       (dstX1 != clip.dstX1) ||
 127       (dstY1 != clip.dstY1);
 128
 129    if (st_fb_orientation(drawFB) == Y_0_TOP) {
 130       /* invert Y for dest */
 131       dstY0 = drawFB->Height - dstY0;
 132       dstY1 = drawFB->Height - dstY1;
 133       /* invert Y for clip */
 134       clip.dstY0 = drawFB->Height - clip.dstY0;
 135       clip.dstY1 = drawFB->Height - clip.dstY1;
 136    }
 137    if (blit.scissor_enable) {
 138       blit.scissor.minx = MIN2(clip.dstX0, clip.dstX1);
 139       blit.scissor.miny = MIN2(clip.dstY0, clip.dstY1);
 140       blit.scissor.maxx = MAX2(clip.dstX0, clip.dstX1);
 141       blit.scissor.maxy = MAX2(clip.dstY0, clip.dstY1);
 142 #if 0
 143       debug_printf("scissor = (%i,%i)-(%i,%i)\n",
 144                    blit.scissor.minx,blit.scissor.miny,
 145                    blit.scissor.maxx,blit.scissor.maxy);
 146 #endif
 147    }
 148
 149    if (st_fb_orientation(readFB) == Y_0_TOP) {
 150       /* invert Y for src */
 151       srcY0 = readFB->Height - srcY0;
 152       srcY1 = readFB->Height - srcY1;
 153    }
 154
 155    if (srcY0 > srcY1 && dstY0 > dstY1) {
 156       /* Both src and dst are upside down.  Swap Y to make it
 157        * right-side up to increase odds of using a fast path.
 158        * Recall that all Gallium raster coords have Y=0=top.
 159        */
 160       GLint tmp;
 161       tmp = srcY0;
 162       srcY0 = srcY1;
 163       srcY1 = tmp;
 164       tmp = dstY0;
 165       dstY0 = dstY1;
 166       dstY1 = tmp;
 167    }
 168
 169    blit.src.box.depth = 1;
 170    blit.dst.box.depth = 1;
 171
 172    /* Destination dimensions have to be positive: */
 173    if (dstX0 < dstX1) {
 174       blit.dst.box.x = dstX0;
 175       blit.src.box.x = srcX0;
 176       blit.dst.box.width = dstX1 - dstX0;
 177       blit.src.box.width = srcX1 - srcX0;
 178    } else {
 179       blit.dst.box.x = dstX1;
 180       blit.src.box.x = srcX1;
 181       blit.dst.box.width = dstX0 - dstX1;
 182       blit.src.box.width = srcX0 - srcX1;
 183    }
 184    if (dstY0 < dstY1) {
 185       blit.dst.box.y = dstY0;
 186       blit.src.box.y = srcY0;
 187       blit.dst.box.height = dstY1 - dstY0;
 188       blit.src.box.height = srcY1 - srcY0;
 189    } else {
 190       blit.dst.box.y = dstY1;
 191       blit.src.box.y = srcY1;
 192       blit.dst.box.height = dstY0 - dstY1;
 193       blit.src.box.height = srcY0 - srcY1;
 194    }
 195
 196    if (drawFB != ctx->WinSysDrawBuffer)
 197       st_window_rectangles_to_blit(ctx, &blit);
 198
 199    blit.filter = pFilter;
 200    blit.render_condition_enable = TRUE;
 201    blit.alpha_blend = FALSE;
 202
 203    if (mask & GL_COLOR_BUFFER_BIT) {
 204       struct gl_renderbuffer_attachment *srcAtt =
 205          &readFB->Attachment[readFB->_ColorReadBufferIndex];
 206
 207       blit.mask = PIPE_MASK_RGBA;
 208
 209       if (srcAtt->Type == GL_TEXTURE) {
 210          struct st_texture_object *srcObj = st_texture_object(srcAtt->Texture);
 211          GLuint i;
 212
 213          if (!srcObj || !srcObj->pt) {
 214             return;
 215          }
 216
 217          for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
 218             struct st_renderbuffer *dstRb =
 219                st_renderbuffer(drawFB->_ColorDrawBuffers[i]);
 220
 221             if (dstRb) {
 222                struct pipe_surface *dstSurf = dstRb->surface;
 223
 224                if (dstSurf) {
 225                   blit.dst.resource = dstSurf->texture;
 226                   blit.dst.level = dstSurf->u.tex.level;
 227                   blit.dst.box.z = dstSurf->u.tex.first_layer;
 228                   blit.dst.format = util_format_linear(dstSurf->format);
 229
 230                   blit.src.resource = srcObj->pt;
 231                   blit.src.level = srcAtt->TextureLevel;
 232                   blit.src.box.z = srcAtt->Zoffset + srcAtt->CubeMapFace;
 233                   blit.src.format = util_format_linear(srcObj->pt->format);
 234
 235                   st_adjust_blit_for_msaa_resolve(&blit);
 236
 237                   st->pipe->blit(st->pipe, &blit);
 238                   dstRb->defined = true; /* front buffer tracking */
 239                }
 240             }
 241          }
 242       }
 243       else {
 244          struct st_renderbuffer *srcRb =
 245             st_renderbuffer(readFB->_ColorReadBuffer);
 246          struct pipe_surface *srcSurf;
 247          GLuint i;
 248
 249          if (!srcRb || !srcRb->surface) {
 250             return;
 251          }
 252
 253          srcSurf = srcRb->surface;
 254
 255          for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
 256             struct st_renderbuffer *dstRb =
 257                st_renderbuffer(drawFB->_ColorDrawBuffers[i]);
 258
 259             if (dstRb) {
 260                struct pipe_surface *dstSurf = dstRb->surface;
 261
 262                if (dstSurf) {
 263                   blit.dst.resource = dstSurf->texture;
 264                   blit.dst.level = dstSurf->u.tex.level;
 265                   blit.dst.box.z = dstSurf->u.tex.first_layer;
 266                   blit.dst.format = util_format_linear(dstSurf->format);
 267
 268                   blit.src.resource = srcSurf->texture;
 269                   blit.src.level = srcSurf->u.tex.level;
 270                   blit.src.box.z = srcSurf->u.tex.first_layer;
 271                   blit.src.format = util_format_linear(srcSurf->format);
 272
 273                   st_adjust_blit_for_msaa_resolve(&blit);
 274
 275                   st->pipe->blit(st->pipe, &blit);
 276                   dstRb->defined = true; /* front buffer tracking */
 277                }
 278             }
 279          }
 280       }
 281    }
 282
 283    if (mask & depthStencil) {
 284       /* depth and/or stencil blit */
 285
 286       /* get src/dst depth surfaces */
 287       struct st_renderbuffer *srcDepthRb =
 288          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 289       struct st_renderbuffer *dstDepthRb =
 290          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 291       struct pipe_surface *dstDepthSurf =
 292          dstDepthRb ? dstDepthRb->surface : NULL;
 293
 294       struct st_renderbuffer *srcStencilRb =
 295          st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 296       struct st_renderbuffer *dstStencilRb =
 297          st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 298       struct pipe_surface *dstStencilSurf =
 299          dstStencilRb ? dstStencilRb->surface : NULL;
 300
 301       if (_mesa_has_depthstencil_combined(readFB) &&
 302           _mesa_has_depthstencil_combined(drawFB)) {
 303          blit.mask = 0;
 304          if (mask & GL_DEPTH_BUFFER_BIT)
 305             blit.mask |= PIPE_MASK_Z;
 306          if (mask & GL_STENCIL_BUFFER_BIT)
 307             blit.mask |= PIPE_MASK_S;
 308
 309          blit.dst.resource = dstDepthSurf->texture;
 310          blit.dst.level = dstDepthSurf->u.tex.level;
 311          blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
 312          blit.dst.format = dstDepthSurf->format;
 313
 314          blit.src.resource = srcDepthRb->texture;
 315          blit.src.level = srcDepthRb->surface->u.tex.level;
 316          blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
 317          blit.src.format = srcDepthRb->surface->format;
 318
 319          st->pipe->blit(st->pipe, &blit);
 320       }
 321       else {
 322          /* blitting depth and stencil separately */
 323
 324          if (mask & GL_DEPTH_BUFFER_BIT) {
 325             blit.mask = PIPE_MASK_Z;
 326
 327             blit.dst.resource = dstDepthSurf->texture;
 328             blit.dst.level = dstDepthSurf->u.tex.level;
 329             blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
 330             blit.dst.format = dstDepthSurf->format;
 331
 332             blit.src.resource = srcDepthRb->texture;
 333             blit.src.level = srcDepthRb->surface->u.tex.level;
 334             blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
 335             blit.src.format = srcDepthRb->surface->format;
 336
 337             st->pipe->blit(st->pipe, &blit);
 338          }
 339
 340          if (mask & GL_STENCIL_BUFFER_BIT) {
 341             blit.mask = PIPE_MASK_S;
 342
 343             blit.dst.resource = dstStencilSurf->texture;
 344             blit.dst.level = dstStencilSurf->u.tex.level;
 345             blit.dst.box.z = dstStencilSurf->u.tex.first_layer;
 346             blit.dst.format = dstStencilSurf->format;
 347
 348             blit.src.resource = srcStencilRb->texture;
 349             blit.src.level = srcStencilRb->surface->u.tex.level;
 350             blit.src.box.z = srcStencilRb->surface->u.tex.first_layer;
 351             blit.src.format = srcStencilRb->surface->format;
 352
 353             st->pipe->blit(st->pipe, &blit);
 354          }
 355       }
 356    }
 357 }
 358
 359
 360 void
 361 st_init_blit_functions(struct dd_function_table *functions)
 362 {
 363    functions->BlitFramebuffer = st_BlitFramebuffer;
 364 }