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
  42 #include "util/u_blit.h"
  43 #include "util/u_inlines.h"
  44
  45
  46 void
  47 st_init_blit(struct st_context *st)
  48 {
  49    st->blit = util_create_blit(st->pipe, st->cso_context);
  50 }
  51
  52
  53 void
  54 st_destroy_blit(struct st_context *st)
  55 {
  56    util_destroy_blit(st->blit);
  57    st->blit = NULL;
  58 }
  59
  60
  61 #if FEATURE_EXT_framebuffer_blit
  62
  63 static void
  64 st_BlitFramebuffer(GLcontext *ctx,
  65                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
  66                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
  67                    GLbitfield mask, GLenum filter)
  68 {
  69    const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
  70                                     GL_STENCIL_BUFFER_BIT);
  71    struct st_context *st = st_context(ctx);
  72    const uint pFilter = ((filter == GL_NEAREST)
  73                          ? PIPE_TEX_MIPFILTER_NEAREST
  74                          : PIPE_TEX_MIPFILTER_LINEAR);
  75    struct gl_framebuffer *readFB = ctx->ReadBuffer;
  76    struct gl_framebuffer *drawFB = ctx->DrawBuffer;
  77
  78    if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
  79                         &dstX0, &dstY0, &dstX1, &dstY1)) {
  80       return; /* nothing to draw/blit */
  81    }
  82
  83    if (st_fb_orientation(drawFB) == Y_0_TOP) {
  84       /* invert Y for dest */
  85       dstY0 = drawFB->Height - dstY0;
  86       dstY1 = drawFB->Height - dstY1;
  87    }
  88
  89    if (st_fb_orientation(readFB) == Y_0_TOP) {
  90       /* invert Y for src */
  91       srcY0 = readFB->Height - srcY0;
  92       srcY1 = readFB->Height - srcY1;
  93    }
  94
  95    if (srcY0 > srcY1 && dstY0 > dstY1) {
  96       /* Both src and dst are upside down.  Swap Y to make it
  97        * right-side up to increase odds of using a fast path.
  98        * Recall that all Gallium raster coords have Y=0=top.
  99        */
 100       GLint tmp;
 101       tmp = srcY0;
 102       srcY0 = srcY1;
 103       srcY1 = tmp;
 104       tmp = dstY0;
 105       dstY0 = dstY1;
 106       dstY1 = tmp;
 107    }
 108
 109    if (mask & GL_COLOR_BUFFER_BIT) {
 110       struct gl_renderbuffer_attachment *srcAtt =
 111          &readFB->Attachment[readFB->_ColorReadBufferIndex];
 112
 113       if(srcAtt->Type == GL_TEXTURE) {
 114          struct st_texture_object *srcObj =
 115             st_texture_object(srcAtt->Texture);
 116          struct st_renderbuffer *dstRb =
 117             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 118          struct pipe_subresource srcSub;
 119          struct pipe_surface *dstSurf = dstRb->surface;
 120
 121          if (!srcObj->pt)
 122             return;
 123
 124          srcSub.face = srcAtt->CubeMapFace;
 125          srcSub.level = srcAtt->TextureLevel;
 126
 127          util_blit_pixels(st->blit, srcObj->pt, srcSub,
 128                           srcX0, srcY0, srcX1, srcY1, srcAtt->Zoffset,
 129                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 130                           0.0, pFilter);
 131       }
 132       else {
 133          struct st_renderbuffer *srcRb =
 134             st_renderbuffer(readFB->_ColorReadBuffer);
 135          struct st_renderbuffer *dstRb =
 136             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 137          struct pipe_surface *srcSurf = srcRb->surface;
 138          struct pipe_surface *dstSurf = dstRb->surface;
 139          struct pipe_subresource srcSub;
 140
 141          srcSub.face = srcSurf->face;
 142          srcSub.level = srcSurf->level;
 143
 144          util_blit_pixels(st->blit,
 145                           srcRb->texture, srcSub, srcX0, srcY0, srcX1, srcY1,
 146                           srcSurf->zslice,
 147                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 148                           0.0, pFilter);
 149       }
 150    }
 151
 152    if (mask & depthStencil) {
 153       /* depth and/or stencil blit */
 154
 155       /* get src/dst depth surfaces */
 156       struct gl_renderbuffer_attachment *srcDepth =
 157          &readFB->Attachment[BUFFER_DEPTH];
 158       struct gl_renderbuffer_attachment *dstDepth =
 159          &drawFB->Attachment[BUFFER_DEPTH];
 160       struct gl_renderbuffer_attachment *srcStencil =
 161          &readFB->Attachment[BUFFER_STENCIL];
 162       struct gl_renderbuffer_attachment *dstStencil =
 163          &drawFB->Attachment[BUFFER_STENCIL];
 164
 165       struct st_renderbuffer *srcDepthRb =
 166          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 167       struct st_renderbuffer *dstDepthRb =
 168          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 169       struct pipe_surface *dstDepthSurf =
 170          dstDepthRb ? dstDepthRb->surface : NULL;
 171
 172       if ((mask & depthStencil) == depthStencil &&
 173           st_is_depth_stencil_combined(srcDepth, srcStencil) &&
 174           st_is_depth_stencil_combined(dstDepth, dstStencil)) {
 175
 176          /* Blitting depth and stencil values between combined
 177           * depth/stencil buffers.  This is the ideal case for such buffers.
 178           */
 179          util_blit_pixels(st->blit, srcDepthRb->texture,
 180                           u_subresource(srcDepthRb->surface->face,
 181                                         srcDepthRb->surface->level),
 182                           srcX0, srcY0, srcX1, srcY1,
 183                           srcDepthRb->surface->zslice,
 184                           dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
 185                           0.0, pFilter);
 186       }
 187       else {
 188          /* blitting depth and stencil separately */
 189
 190          if (mask & GL_DEPTH_BUFFER_BIT) {
 191             util_blit_pixels(st->blit, srcDepthRb->texture,
 192                              u_subresource(srcDepthRb->surface->face,
 193                                            srcDepthRb->surface->level),
 194                              srcX0, srcY0, srcX1, srcY1,
 195                              srcDepthRb->surface->zslice,
 196                              dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
 197                              0.0, pFilter);
 198          }
 199
 200          if (mask & GL_STENCIL_BUFFER_BIT) {
 201             /* blit stencil only */
 202             _mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) not completed");
 203          }
 204       }
 205    }
 206 }
 207
 208
 209 void
 210 st_init_blit_functions(struct dd_function_table *functions)
 211 {
 212    functions->BlitFramebuffer = st_BlitFramebuffer;
 213 }
 214
 215 #endif /* FEATURE_EXT_framebuffer_blit */