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 #include "main/mfeatures.h"
  37
  38 #include "st_context.h"
  39 #include "st_texture.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_BlitFramebuffer(struct gl_context *ctx,
  49                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
  50                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
  51                    GLbitfield mask, GLenum filter)
  52 {
  53    const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
  54                                     GL_STENCIL_BUFFER_BIT);
  55    struct st_context *st = st_context(ctx);
  56    const uint pFilter = ((filter == GL_NEAREST)
  57                          ? PIPE_TEX_FILTER_NEAREST
  58                          : PIPE_TEX_FILTER_LINEAR);
  59    struct gl_framebuffer *readFB = ctx->ReadBuffer;
  60    struct gl_framebuffer *drawFB = ctx->DrawBuffer;
  61    struct {
  62       GLint srcX0, srcY0, srcX1, srcY1;
  63       GLint dstX0, dstY0, dstX1, dstY1;
  64    } clip;
  65    struct pipe_blit_info blit;
  66
  67    st_validate_state(st);
  68
  69    clip.srcX0 = srcX0;
  70    clip.srcY0 = srcY0;
  71    clip.srcX1 = srcX1;
  72    clip.srcY1 = srcY1;
  73    clip.dstX0 = dstX0;
  74    clip.dstY0 = dstY0;
  75    clip.dstX1 = dstX1;
  76    clip.dstY1 = dstY1;
  77
  78    /* NOTE: If the src and dst dimensions don't match, we cannot simply adjust
  79     * the integer coordinates to account for clipping (or scissors) because that
  80     * would make us cut off fractional parts, affecting the result of the blit.
  81     *
  82     * XXX: This should depend on mask !
  83     */
  84    if (!_mesa_clip_blit(ctx,
  85                         &clip.srcX0, &clip.srcY0, &clip.srcX1, &clip.srcY1,
  86                         &clip.dstX0, &clip.dstY0, &clip.dstX1, &clip.dstY1)) {
  87       return; /* nothing to draw/blit */
  88    }
  89    blit.scissor_enable =
  90       (dstX0 != clip.dstX0) ||
  91       (dstY0 != clip.dstY0) ||
  92       (dstX1 != clip.dstX1) ||
  93       (dstY1 != clip.dstY1);
  94
  95    if (st_fb_orientation(drawFB) == Y_0_TOP) {
  96       /* invert Y for dest */
  97       dstY0 = drawFB->Height - dstY0;
  98       dstY1 = drawFB->Height - dstY1;
  99       /* invert Y for clip */
 100       clip.dstY0 = drawFB->Height - clip.dstY0;
 101       clip.dstY1 = drawFB->Height - clip.dstY1;
 102    }
 103    if (blit.scissor_enable) {
 104       blit.scissor.minx = MIN2(clip.dstX0, clip.dstX1);
 105       blit.scissor.miny = MIN2(clip.dstY0, clip.dstY1);
 106       blit.scissor.maxx = MAX2(clip.dstX0, clip.dstX1);
 107       blit.scissor.maxy = MAX2(clip.dstY0, clip.dstY1);
 108 #if 0
 109       debug_printf("scissor = (%i,%i)-(%i,%i)\n",
 110                    blit.scissor.minx,blit.scissor.miny,
 111                    blit.scissor.maxx,blit.scissor.maxy);
 112 #endif
 113    }
 114
 115    if (st_fb_orientation(readFB) == Y_0_TOP) {
 116       /* invert Y for src */
 117       srcY0 = readFB->Height - srcY0;
 118       srcY1 = readFB->Height - srcY1;
 119    }
 120
 121    if (srcY0 > srcY1 && dstY0 > dstY1) {
 122       /* Both src and dst are upside down.  Swap Y to make it
 123        * right-side up to increase odds of using a fast path.
 124        * Recall that all Gallium raster coords have Y=0=top.
 125        */
 126       GLint tmp;
 127       tmp = srcY0;
 128       srcY0 = srcY1;
 129       srcY1 = tmp;
 130       tmp = dstY0;
 131       dstY0 = dstY1;
 132       dstY1 = tmp;
 133    }
 134
 135    blit.src.box.depth = 1;
 136    blit.dst.box.depth = 1;
 137
 138    /* Destination dimensions have to be positive: */
 139    if (dstX0 < dstX1) {
 140       blit.dst.box.x = dstX0;
 141       blit.src.box.x = srcX0;
 142       blit.dst.box.width = dstX1 - dstX0;
 143       blit.src.box.width = srcX1 - srcX0;
 144    } else {
 145       blit.dst.box.x = dstX1;
 146       blit.src.box.x = srcX1;
 147       blit.dst.box.width = dstX0 - dstX1;
 148       blit.src.box.width = srcX0 - srcX1;
 149    }
 150    if (dstY0 < dstY1) {
 151       blit.dst.box.y = dstY0;
 152       blit.src.box.y = srcY0;
 153       blit.dst.box.height = dstY1 - dstY0;
 154       blit.src.box.height = srcY1 - srcY0;
 155    } else {
 156       blit.dst.box.y = dstY1;
 157       blit.src.box.y = srcY1;
 158       blit.dst.box.height = dstY0 - dstY1;
 159       blit.src.box.height = srcY0 - srcY1;
 160    }
 161
 162    blit.filter = pFilter;
 163
 164    if (mask & GL_COLOR_BUFFER_BIT) {
 165       struct gl_renderbuffer_attachment *srcAtt =
 166          &readFB->Attachment[readFB->_ColorReadBufferIndex];
 167
 168       blit.mask = PIPE_MASK_RGBA;
 169
 170       if (srcAtt->Type == GL_TEXTURE) {
 171          struct st_texture_object *srcObj = st_texture_object(srcAtt->Texture);
 172          GLuint i;
 173
 174          if (!srcObj || !srcObj->pt) {
 175             return;
 176          }
 177
 178          for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
 179             struct st_renderbuffer *dstRb =
 180                st_renderbuffer(drawFB->_ColorDrawBuffers[i]);
 181
 182             if (dstRb) {
 183                struct pipe_surface *dstSurf = dstRb->surface;
 184
 185                if (dstSurf) {
 186                   blit.dst.resource = dstSurf->texture;
 187                   blit.dst.level = dstSurf->u.tex.level;
 188                   blit.dst.box.z = dstSurf->u.tex.first_layer;
 189                   blit.dst.format = util_format_linear(dstSurf->format);
 190
 191                   blit.src.resource = srcObj->pt;
 192                   blit.src.level = srcAtt->TextureLevel;
 193                   blit.src.box.z = srcAtt->Zoffset + srcAtt->CubeMapFace;
 194                   blit.src.format = util_format_linear(srcObj->pt->format);
 195
 196                   st->pipe->blit(st->pipe, &blit);
 197                }
 198             }
 199          }
 200       }
 201       else {
 202          struct st_renderbuffer *srcRb =
 203             st_renderbuffer(readFB->_ColorReadBuffer);
 204          struct pipe_surface *srcSurf;
 205          GLuint i;
 206
 207          if (!srcRb || !srcRb->surface) {
 208             return;
 209          }
 210
 211          srcSurf = srcRb->surface;
 212
 213          for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
 214             struct st_renderbuffer *dstRb =
 215                st_renderbuffer(drawFB->_ColorDrawBuffers[i]);
 216
 217             if (dstRb) {
 218                struct pipe_surface *dstSurf = dstRb->surface;
 219
 220                if (dstSurf) {
 221                   blit.dst.resource = dstSurf->texture;
 222                   blit.dst.level = dstSurf->u.tex.level;
 223                   blit.dst.box.z = dstSurf->u.tex.first_layer;
 224                   blit.dst.format = util_format_linear(dstSurf->format);
 225
 226                   blit.src.resource = srcSurf->texture;
 227                   blit.src.level = srcSurf->u.tex.level;
 228                   blit.src.box.z = srcSurf->u.tex.first_layer;
 229                   blit.src.format = util_format_linear(srcSurf->format);
 230
 231                   st->pipe->blit(st->pipe, &blit);
 232                }
 233             }
 234          }
 235       }
 236    }
 237
 238    if (mask & depthStencil) {
 239       /* depth and/or stencil blit */
 240
 241       /* get src/dst depth surfaces */
 242       struct gl_renderbuffer_attachment *srcDepth =
 243          &readFB->Attachment[BUFFER_DEPTH];
 244       struct gl_renderbuffer_attachment *dstDepth =
 245          &drawFB->Attachment[BUFFER_DEPTH];
 246       struct gl_renderbuffer_attachment *srcStencil =
 247          &readFB->Attachment[BUFFER_STENCIL];
 248       struct gl_renderbuffer_attachment *dstStencil =
 249          &drawFB->Attachment[BUFFER_STENCIL];
 250
 251       struct st_renderbuffer *srcDepthRb =
 252          st_renderbuffer(srcDepth->Renderbuffer);
 253       struct st_renderbuffer *dstDepthRb =
 254          st_renderbuffer(dstDepth->Renderbuffer);
 255       struct pipe_surface *dstDepthSurf =
 256          dstDepthRb ? dstDepthRb->surface : NULL;
 257
 258       struct st_renderbuffer *srcStencilRb =
 259          st_renderbuffer(srcStencil->Renderbuffer);
 260       struct st_renderbuffer *dstStencilRb =
 261          st_renderbuffer(dstStencil->Renderbuffer);
 262       struct pipe_surface *dstStencilSurf =
 263          dstStencilRb ? dstStencilRb->surface : NULL;
 264
 265       if (st_is_depth_stencil_combined(srcDepth, srcStencil) &&
 266           st_is_depth_stencil_combined(dstDepth, dstStencil)) {
 267          blit.mask = 0;
 268          if (mask & GL_DEPTH_BUFFER_BIT)
 269             blit.mask |= PIPE_MASK_Z;
 270          if (mask & GL_STENCIL_BUFFER_BIT)
 271             blit.mask |= PIPE_MASK_S;
 272
 273          blit.dst.resource = dstDepthSurf->texture;
 274          blit.dst.level = dstDepthSurf->u.tex.level;
 275          blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
 276          blit.dst.format = dstDepthSurf->format;
 277
 278          blit.src.resource = srcDepthRb->texture;
 279          blit.src.level = srcDepthRb->surface->u.tex.level;
 280          blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
 281          blit.src.format = srcDepthRb->surface->format;
 282
 283          st->pipe->blit(st->pipe, &blit);
 284       }
 285       else {
 286          /* blitting depth and stencil separately */
 287
 288          if (mask & GL_DEPTH_BUFFER_BIT) {
 289             blit.mask = PIPE_MASK_Z;
 290
 291             blit.dst.resource = dstDepthSurf->texture;
 292             blit.dst.level = dstDepthSurf->u.tex.level;
 293             blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
 294             blit.dst.format = dstDepthSurf->format;
 295
 296             blit.src.resource = srcDepthRb->texture;
 297             blit.src.level = srcDepthRb->surface->u.tex.level;
 298             blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
 299             blit.src.format = srcDepthRb->surface->format;
 300
 301             st->pipe->blit(st->pipe, &blit);
 302          }
 303
 304          if (mask & GL_STENCIL_BUFFER_BIT) {
 305             blit.mask = PIPE_MASK_S;
 306
 307             blit.dst.resource = dstStencilSurf->texture;
 308             blit.dst.level = dstStencilSurf->u.tex.level;
 309             blit.dst.box.z = dstStencilSurf->u.tex.first_layer;
 310             blit.dst.format = dstStencilSurf->format;
 311
 312             blit.src.resource = srcStencilRb->texture;
 313             blit.src.level = srcStencilRb->surface->u.tex.level;
 314             blit.src.box.z = srcStencilRb->surface->u.tex.first_layer;
 315             blit.src.format = srcStencilRb->surface->format;
 316
 317             st->pipe->blit(st->pipe, &blit);
 318          }
 319       }
 320    }
 321 }
 322
 323
 324 void
 325 st_init_blit_functions(struct dd_function_table *functions)
 326 {
 327    functions->BlitFramebuffer = st_BlitFramebuffer;
 328 }