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