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 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 = ctx->st;
  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 pipe_screen *screen = ctx->st->pipe->screen;
 115          const struct st_texture_object *srcObj =
 116             st_texture_object(srcAtt->Texture);
 117          struct st_renderbuffer *dstRb =
 118             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 119          struct pipe_surface *srcSurf;
 120          struct pipe_surface *dstSurf = dstRb->surface;
 121
 122          if (!srcObj->pt)
 123             return;
 124
 125          srcSurf = screen->get_tex_surface(screen,
 126                                            srcObj->pt,
 127                                            srcAtt->CubeMapFace,
 128                                            srcAtt->TextureLevel,
 129                                            srcAtt->Zoffset,
 130                                            PIPE_BUFFER_USAGE_GPU_READ);
 131          if(!srcSurf)
 132             return;
 133
 134          util_blit_pixels(st->blit,
 135                           srcSurf, srcX0, srcY0, srcX1, srcY1,
 136                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 137                           0.0, pFilter);
 138
 139          pipe_surface_reference(&srcSurf, NULL);
 140       }
 141       else {
 142          struct st_renderbuffer *srcRb =
 143             st_renderbuffer(readFB->_ColorReadBuffer);
 144          struct st_renderbuffer *dstRb =
 145             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 146          struct pipe_surface *srcSurf = srcRb->surface;
 147          struct pipe_surface *dstSurf = dstRb->surface;
 148
 149          util_blit_pixels(st->blit,
 150                           srcSurf, srcX0, srcY0, srcX1, srcY1,
 151                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 152                           0.0, pFilter);
 153       }
 154    }
 155
 156    if (mask & depthStencil) {
 157       /* depth and/or stencil blit */
 158
 159       /* get src/dst depth surfaces */
 160       struct st_renderbuffer *srcDepthRb =
 161          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 162       struct st_renderbuffer *dstDepthRb =
 163          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 164       struct pipe_surface *srcDepthSurf =
 165          srcDepthRb ? srcDepthRb->surface : NULL;
 166       struct pipe_surface *dstDepthSurf =
 167          dstDepthRb ? dstDepthRb->surface : NULL;
 168
 169       /* get src/dst stencil surfaces */
 170       struct st_renderbuffer *srcStencilRb =
 171          st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 172       struct st_renderbuffer *dstStencilRb =
 173          st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 174       struct pipe_surface *srcStencilSurf =
 175          srcStencilRb ? srcStencilRb->surface : NULL;
 176       struct pipe_surface *dstStencilSurf =
 177          dstStencilRb ? dstStencilRb->surface : NULL;
 178
 179       if ((mask & depthStencil) == depthStencil &&
 180           srcDepthSurf == srcStencilSurf &&
 181           dstDepthSurf == dstStencilSurf) {
 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                           srcDepthSurf, srcX0, srcY0, srcX1, srcY1,
 187                           dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
 188                           0.0, pFilter);
 189       }
 190       else {
 191          /* blitting depth and stencil separately */
 192
 193          if (mask & GL_DEPTH_BUFFER_BIT) {
 194             /* blit Z only */
 195             _mesa_problem(ctx, "st_BlitFramebuffer(DEPTH) not completed");
 196          }
 197
 198          if (mask & GL_STENCIL_BUFFER_BIT) {
 199             /* blit stencil only */
 200             _mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) not completed");
 201          }
 202       }
 203    }
 204 }
 205 #endif /* FEATURE_EXT_framebuffer_blit */
 206
 207
 208
 209 void
 210 st_init_blit_functions(struct dd_function_table *functions)
 211 {
 212 #if FEATURE_EXT_framebuffer_blit
 213    functions->BlitFramebuffer = st_BlitFramebuffer;
 214 #endif
 215 }