src/mesa/state_tracker/st_cb_blit.c

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