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 "shader/program.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
  43 #include "util/u_blit.h"
  44 #include "util/u_inlines.h"
  45
  46
  47 void
  48 st_init_blit(struct st_context *st)
  49 {
  50    st->blit = util_create_blit(st->pipe, st->cso_context);
  51 }
  52
  53
  54 void
  55 st_destroy_blit(struct st_context *st)
  56 {
  57    util_destroy_blit(st->blit);
  58    st->blit = NULL;
  59 }
  60
  61
  62 #if FEATURE_EXT_framebuffer_blit
  63
  64 static void
  65 st_BlitFramebuffer(GLcontext *ctx,
  66                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
  67                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
  68                    GLbitfield mask, GLenum filter)
  69 {
  70    const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
  71                                     GL_STENCIL_BUFFER_BIT);
  72    struct st_context *st = st_context(ctx);
  73    struct pipe_context *pipe = st->pipe;
  74    const uint pFilter = ((filter == GL_NEAREST)
  75                          ? PIPE_TEX_MIPFILTER_NEAREST
  76                          : PIPE_TEX_MIPFILTER_LINEAR);
  77    struct gl_framebuffer *readFB = ctx->ReadBuffer;
  78    struct gl_framebuffer *drawFB = ctx->DrawBuffer;
  79
  80    if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
  81                         &dstX0, &dstY0, &dstX1, &dstY1)) {
  82       return; /* nothing to draw/blit */
  83    }
  84
  85    if (st_fb_orientation(drawFB) == Y_0_TOP) {
  86       /* invert Y for dest */
  87       dstY0 = drawFB->Height - dstY0;
  88       dstY1 = drawFB->Height - dstY1;
  89    }
  90
  91    if (st_fb_orientation(readFB) == Y_0_TOP) {
  92       /* invert Y for src */
  93       srcY0 = readFB->Height - srcY0;
  94       srcY1 = readFB->Height - srcY1;
  95    }
  96
  97    if (srcY0 > srcY1 && dstY0 > dstY1) {
  98       /* Both src and dst are upside down.  Swap Y to make it
  99        * right-side up to increase odds of using a fast path.
 100        * Recall that all Gallium raster coords have Y=0=top.
 101        */
 102       GLint tmp;
 103       tmp = srcY0;
 104       srcY0 = srcY1;
 105       srcY1 = tmp;
 106       tmp = dstY0;
 107       dstY0 = dstY1;
 108       dstY1 = tmp;
 109    }
 110
 111    if (mask & GL_COLOR_BUFFER_BIT) {
 112       struct gl_renderbuffer_attachment *srcAtt =
 113          &readFB->Attachment[readFB->_ColorReadBufferIndex];
 114
 115       if(srcAtt->Type == GL_TEXTURE) {
 116          struct st_texture_object *srcObj =
 117             st_texture_object(srcAtt->Texture);
 118          struct st_renderbuffer *dstRb =
 119             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 120          struct pipe_subresource srcSub;
 121          struct pipe_surface *dstSurf = dstRb->surface;
 122
 123          if (!srcObj->pt)
 124             return;
 125
 126          srcSub.face = srcAtt->CubeMapFace;
 127          srcSub.level = srcAtt->TextureLevel;
 128
 129          util_blit_pixels(st->blit, srcObj->pt, srcSub,
 130                           srcX0, srcY0, srcX1, srcY1, srcAtt->Zoffset,
 131                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 132                           0.0, pFilter);
 133       }
 134       else {
 135          struct st_renderbuffer *srcRb =
 136             st_renderbuffer(readFB->_ColorReadBuffer);
 137          struct st_renderbuffer *dstRb =
 138             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 139          struct pipe_surface *srcSurf = srcRb->surface;
 140          struct pipe_surface *dstSurf = dstRb->surface;
 141          struct pipe_subresource srcSub;
 142
 143          srcSub.face = srcSurf->face;
 144          srcSub.level = srcSurf->level;
 145
 146          util_blit_pixels(st->blit,
 147                           srcRb->texture, srcSub, srcX0, srcY0, srcX1, srcY1,
 148                           srcSurf->zslice,
 149                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 150                           0.0, pFilter);
 151       }
 152    }
 153
 154    if (mask & depthStencil) {
 155       /* depth and/or stencil blit */
 156
 157       /* get src/dst depth surfaces */
 158       struct st_renderbuffer *srcDepthRb =
 159          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 160       struct st_renderbuffer *dstDepthRb =
 161          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 162       struct pipe_surface *srcDepthSurf =
 163          srcDepthRb ? srcDepthRb->surface : NULL;
 164       struct pipe_surface *dstDepthSurf =
 165          dstDepthRb ? dstDepthRb->surface : NULL;
 166
 167       /* get src/dst stencil surfaces */
 168       struct st_renderbuffer *srcStencilRb =
 169          st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 170       struct st_renderbuffer *dstStencilRb =
 171          st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 172       struct pipe_surface *srcStencilSurf =
 173          srcStencilRb ? srcStencilRb->surface : NULL;
 174       struct pipe_surface *dstStencilSurf =
 175          dstStencilRb ? dstStencilRb->surface : NULL;
 176
 177       if ((mask & depthStencil) == depthStencil &&
 178           srcDepthSurf == srcStencilSurf &&
 179           dstDepthSurf == dstStencilSurf) {
 180          struct pipe_subresource srcSub;
 181
 182          srcSub.face = srcDepthRb->surface->face;
 183          srcSub.level = srcDepthRb->surface->level;
 184
 185          /* Blitting depth and stencil values between combined
 186           * depth/stencil buffers.  This is the ideal case for such buffers.
 187           */
 188          util_blit_pixels(st->blit,
 189                           srcDepthRb->texture, srcSub, srcX0, srcY0, srcX1, srcY1,
 190                           srcDepthRb->surface->zslice,
 191                           dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
 192                           0.0, pFilter);
 193       }
 194       else {
 195          /* blitting depth and stencil separately */
 196
 197          if (mask & GL_DEPTH_BUFFER_BIT) {
 198             /* blit Z only */
 199             _mesa_problem(ctx, "st_BlitFramebuffer(DEPTH) not completed");
 200          }
 201
 202          if (mask & GL_STENCIL_BUFFER_BIT) {
 203             /* blit stencil only */
 204             _mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) not completed");
 205          }
 206       }
 207    }
 208 }
 209
 210
 211 void
 212 st_init_blit_functions(struct dd_function_table *functions)
 213 {
 214    functions->BlitFramebuffer = st_BlitFramebuffer;
 215 }
 216
 217 #endif /* FEATURE_EXT_framebuffer_blit */