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    struct pipe_context *pipe = st->pipe;
  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 = pipe->screen;
 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_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, st_get_stobj_sampler_view(srcObj),
 137                           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_sampler_view *srcView = st_renderbuffer_get_sampler_view(srcRb, pipe);
 150          struct pipe_surface *dstSurf = dstRb->surface;
 151
 152          util_blit_pixels(st->blit,
 153                           srcSurf, srcView, srcX0, srcY0, srcX1, srcY1,
 154                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 155                           0.0, pFilter);
 156       }
 157    }
 158
 159    if (mask & depthStencil) {
 160       /* depth and/or stencil blit */
 161
 162       /* get src/dst depth surfaces */
 163       struct st_renderbuffer *srcDepthRb =
 164          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 165       struct st_renderbuffer *dstDepthRb =
 166          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 167       struct pipe_surface *srcDepthSurf =
 168          srcDepthRb ? srcDepthRb->surface : NULL;
 169       struct pipe_surface *dstDepthSurf =
 170          dstDepthRb ? dstDepthRb->surface : NULL;
 171
 172       /* get src/dst stencil surfaces */
 173       struct st_renderbuffer *srcStencilRb =
 174          st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 175       struct st_renderbuffer *dstStencilRb =
 176          st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 177       struct pipe_surface *srcStencilSurf =
 178          srcStencilRb ? srcStencilRb->surface : NULL;
 179       struct pipe_surface *dstStencilSurf =
 180          dstStencilRb ? dstStencilRb->surface : NULL;
 181
 182       if ((mask & depthStencil) == depthStencil &&
 183           srcDepthSurf == srcStencilSurf &&
 184           dstDepthSurf == dstStencilSurf) {
 185          struct pipe_sampler_view *srcView = st_renderbuffer_get_sampler_view(srcDepthRb, pipe);
 186
 187          /* Blitting depth and stencil values between combined
 188           * depth/stencil buffers.  This is the ideal case for such buffers.
 189           */
 190          util_blit_pixels(st->blit,
 191                           srcDepthSurf, srcView, srcX0, srcY0, srcX1, srcY1,
 192                           dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
 193                           0.0, pFilter);
 194       }
 195       else {
 196          /* blitting depth and stencil separately */
 197
 198          if (mask & GL_DEPTH_BUFFER_BIT) {
 199             /* blit Z only */
 200             _mesa_problem(ctx, "st_BlitFramebuffer(DEPTH) not completed");
 201          }
 202
 203          if (mask & GL_STENCIL_BUFFER_BIT) {
 204             /* blit stencil only */
 205             _mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) not completed");
 206          }
 207       }
 208    }
 209 }
 210 #endif /* FEATURE_EXT_framebuffer_blit */
 211
 212
 213
 214 void
 215 st_init_blit_functions(struct dd_function_table *functions)
 216 {
 217 #if FEATURE_EXT_framebuffer_blit
 218    functions->BlitFramebuffer = st_BlitFramebuffer;
 219 #endif
 220 }