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 #include "cso_cache/cso_context.h"
  47
  48
  49 void
  50 st_init_blit(struct st_context *st)
  51 {
  52    st->blit = util_create_blit(st->pipe, st->cso_context);
  53 }
  54
  55
  56 void
  57 st_destroy_blit(struct st_context *st)
  58 {
  59    util_destroy_blit(st->blit);
  60    st->blit = NULL;
  61 }
  62
  63
  64 #if FEATURE_EXT_framebuffer_blit
  65 static void
  66 st_BlitFramebuffer(GLcontext *ctx,
  67                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
  68                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
  69                    GLbitfield mask, GLenum filter)
  70 {
  71    const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
  72                                     GL_STENCIL_BUFFER_BIT);
  73    struct st_context *st = ctx->st;
  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 pipe_screen *screen = ctx->st->pipe->screen;
 117          const struct st_texture_object *srcObj =
 118             st_texture_object(srcAtt->Texture);
 119          struct st_renderbuffer *dstRb =
 120             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 121          struct pipe_surface *srcSurf;
 122          struct pipe_surface *dstSurf = dstRb->surface;
 123
 124          if (!srcObj->pt)
 125             return;
 126
 127          srcSurf = screen->get_tex_surface(screen,
 128                                            srcObj->pt,
 129                                            srcAtt->CubeMapFace,
 130                                            srcAtt->TextureLevel,
 131                                            srcAtt->Zoffset,
 132                                            PIPE_BUFFER_USAGE_GPU_READ);
 133          if(!srcSurf)
 134             return;
 135
 136          util_blit_pixels(st->blit,
 137                           srcSurf, srcX0, srcY0, srcX1, srcY1,
 138                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 139                           0.0, pFilter);
 140
 141          pipe_surface_reference(&srcSurf, NULL);
 142       }
 143       else {
 144          struct st_renderbuffer *srcRb =
 145             st_renderbuffer(readFB->_ColorReadBuffer);
 146          struct st_renderbuffer *dstRb =
 147             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 148          struct pipe_surface *srcSurf = srcRb->surface;
 149          struct pipe_surface *dstSurf = dstRb->surface;
 150
 151          util_blit_pixels(st->blit,
 152                           srcSurf, srcX0, srcY0, srcX1, srcY1,
 153                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 154                           0.0, pFilter);
 155       }
 156    }
 157
 158    if (mask & depthStencil) {
 159       /* depth and/or stencil blit */
 160
 161       /* get src/dst depth surfaces */
 162       struct st_renderbuffer *srcDepthRb =
 163          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 164       struct st_renderbuffer *dstDepthRb =
 165          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 166       struct pipe_surface *srcDepthSurf =
 167          srcDepthRb ? srcDepthRb->surface : NULL;
 168       struct pipe_surface *dstDepthSurf =
 169          dstDepthRb ? dstDepthRb->surface : NULL;
 170
 171       /* get src/dst stencil surfaces */
 172       struct st_renderbuffer *srcStencilRb =
 173          st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 174       struct st_renderbuffer *dstStencilRb =
 175          st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 176       struct pipe_surface *srcStencilSurf =
 177          srcStencilRb ? srcStencilRb->surface : NULL;
 178       struct pipe_surface *dstStencilSurf =
 179          dstStencilRb ? dstStencilRb->surface : NULL;
 180
 181       if ((mask & depthStencil) == depthStencil &&
 182           srcDepthSurf == srcStencilSurf &&
 183           dstDepthSurf == dstStencilSurf) {
 184          /* Blitting depth and stencil values between combined
 185           * depth/stencil buffers.  This is the ideal case for such buffers.
 186           */
 187          util_blit_pixels(st->blit,
 188                           srcDepthSurf, srcX0, srcY0, srcX1, srcY1,
 189                           dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
 190                           0.0, pFilter);
 191       }
 192       else {
 193          /* blitting depth and stencil separately */
 194
 195          if (mask & GL_DEPTH_BUFFER_BIT) {
 196             /* blit Z only */
 197             _mesa_problem(ctx, "st_BlitFramebuffer(DEPTH) not completed");
 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 #endif /* FEATURE_EXT_framebuffer_blit */
 208
 209
 210
 211 void
 212 st_init_blit_functions(struct dd_function_table *functions)
 213 {
 214 #if FEATURE_EXT_framebuffer_blit
 215    functions->BlitFramebuffer = st_BlitFramebuffer;
 216 #endif
 217 }