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
  45 #include "cso_cache/cso_context.h"
  46
  47
  48 void
  49 st_init_blit(struct st_context *st)
  50 {
  51    st->blit = util_create_blit(st->pipe, st->cso_context);
  52 }
  53
  54
  55 void
  56 st_destroy_blit(struct st_context *st)
  57 {
  58    util_destroy_blit(st->blit);
  59    st->blit = NULL;
  60 }
  61
  62
  63 #if FEATURE_EXT_framebuffer_blit
  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 = ctx->st;
  73    const uint pFilter = ((filter == GL_NEAREST)
  74                          ? PIPE_TEX_MIPFILTER_NEAREST
  75                          : PIPE_TEX_MIPFILTER_LINEAR);
  76    struct gl_framebuffer *readFB = ctx->ReadBuffer;
  77    struct gl_framebuffer *drawFB = ctx->DrawBuffer;
  78
  79    if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
  80                         &dstX0, &dstY0, &dstX1, &dstY1)) {
  81       return; /* nothing to draw/blit */
  82    }
  83
  84    if (st_fb_orientation(drawFB) == Y_0_TOP) {
  85       /* invert Y for dest */
  86       dstY0 = drawFB->Height - dstY0;
  87       dstY1 = drawFB->Height - dstY1;
  88    }
  89
  90    if (st_fb_orientation(readFB) == Y_0_TOP) {
  91       /* invert Y for src */
  92       srcY0 = readFB->Height - srcY0;
  93       srcY1 = readFB->Height - srcY1;
  94    }
  95
  96    if (srcY0 > srcY1 && dstY0 > dstY1) {
  97       /* Both src and dst are upside down.  Swap Y to make it
  98        * right-side up to increase odds of using a fast path.
  99        * Recall that all Gallium raster coords have Y=0=top.
 100        */
 101       GLint tmp;
 102       tmp = srcY0;
 103       srcY0 = srcY1;
 104       srcY1 = tmp;
 105       tmp = dstY0;
 106       dstY0 = dstY1;
 107       dstY1 = tmp;
 108    }
 109
 110    if (mask & GL_COLOR_BUFFER_BIT) {
 111       struct gl_renderbuffer_attachment *srcAtt =
 112          &readFB->Attachment[readFB->_ColorReadBufferIndex];
 113
 114       if(srcAtt->Type == GL_TEXTURE) {
 115          struct pipe_screen *screen = ctx->st->pipe->screen;
 116          const 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_surface *srcSurf;
 121          struct pipe_surface *dstSurf = dstRb->surface;
 122
 123          if (!srcObj->pt)
 124             return;
 125
 126          srcSurf = screen->get_tex_surface(screen,
 127                                            srcObj->pt,
 128                                            srcAtt->CubeMapFace,
 129                                            srcAtt->TextureLevel,
 130                                            srcAtt->Zoffset,
 131                                            PIPE_BUFFER_USAGE_GPU_READ);
 132          if(!srcSurf)
 133             return;
 134
 135          util_blit_pixels(st->blit,
 136                           srcSurf, srcX0, srcY0, srcX1, srcY1,
 137                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 138                           0.0, pFilter);
 139
 140          pipe_surface_reference(&srcSurf, NULL);
 141       }
 142       else {
 143          struct st_renderbuffer *srcRb =
 144             st_renderbuffer(readFB->_ColorReadBuffer);
 145          struct st_renderbuffer *dstRb =
 146             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 147          struct pipe_surface *srcSurf = srcRb->surface;
 148          struct pipe_surface *dstSurf = dstRb->surface;
 149
 150          util_blit_pixels(st->blit,
 151                           srcSurf, srcX0, srcY0, srcX1, srcY1,
 152                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 153                           0.0, pFilter);
 154       }
 155    }
 156
 157    if (mask & depthStencil) {
 158       /* depth and/or stencil blit */
 159
 160       /* get src/dst depth surfaces */
 161       struct st_renderbuffer *srcDepthRb =
 162          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 163       struct st_renderbuffer *dstDepthRb =
 164          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 165       struct pipe_surface *srcDepthSurf =
 166          srcDepthRb ? srcDepthRb->surface : NULL;
 167       struct pipe_surface *dstDepthSurf =
 168          dstDepthRb ? dstDepthRb->surface : NULL;
 169
 170       /* get src/dst stencil surfaces */
 171       struct st_renderbuffer *srcStencilRb =
 172          st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 173       struct st_renderbuffer *dstStencilRb =
 174          st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 175       struct pipe_surface *srcStencilSurf =
 176          srcStencilRb ? srcStencilRb->surface : NULL;
 177       struct pipe_surface *dstStencilSurf =
 178          dstStencilRb ? dstStencilRb->surface : NULL;
 179
 180       if ((mask & depthStencil) == depthStencil &&
 181           srcDepthSurf == srcStencilSurf &&
 182           dstDepthSurf == dstStencilSurf) {
 183          /* Blitting depth and stencil values between combined
 184           * depth/stencil buffers.  This is the ideal case for such buffers.
 185           */
 186          util_blit_pixels(st->blit,
 187                           srcDepthSurf, srcX0, srcY0, srcX1, srcY1,
 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 #endif /* FEATURE_EXT_framebuffer_blit */
 207
 208
 209
 210 void
 211 st_init_blit_functions(struct dd_function_table *functions)
 212 {
 213 #if FEATURE_EXT_framebuffer_blit
 214    functions->BlitFramebuffer = st_BlitFramebuffer;
 215 #endif
 216 }