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 "main/texformat.h"
  37 #include "shader/program.h"
  38 #include "shader/prog_parameter.h"
  39 #include "shader/prog_print.h"
  40
  41 #include "st_context.h"
  42 #include "st_texture.h"
  43 #include "st_program.h"
  44 #include "st_cb_blit.h"
  45 #include "st_cb_fbo.h"
  46
  47 #include "util/u_blit.h"
  48
  49 #include "cso_cache/cso_context.h"
  50
  51
  52 void
  53 st_init_blit(struct st_context *st)
  54 {
  55    st->blit = util_create_blit(st->pipe, st->cso_context);
  56 }
  57
  58
  59 void
  60 st_destroy_blit(struct st_context *st)
  61 {
  62    util_destroy_blit(st->blit);
  63    st->blit = NULL;
  64 }
  65
  66
  67 static void
  68 st_BlitFramebuffer(GLcontext *ctx,
  69                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
  70                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
  71                    GLbitfield mask, GLenum filter)
  72 {
  73    const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
  74                                     GL_STENCIL_BUFFER_BIT);
  75    struct st_context *st = ctx->st;
  76    const uint pFilter = ((filter == GL_NEAREST)
  77                          ? PIPE_TEX_MIPFILTER_NEAREST
  78                          : PIPE_TEX_MIPFILTER_LINEAR);
  79    struct gl_framebuffer *readFB = ctx->ReadBuffer;
  80    struct gl_framebuffer *drawFB = ctx->DrawBuffer;
  81
  82    if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
  83                         &dstX0, &dstY0, &dstX1, &dstY1)) {
  84       return; /* nothing to draw/blit */
  85    }
  86
  87    if (st_fb_orientation(drawFB) == Y_0_TOP) {
  88       /* invert Y for dest */
  89       dstY0 = drawFB->Height - dstY0;
  90       dstY1 = drawFB->Height - dstY1;
  91    }
  92
  93    if (st_fb_orientation(readFB) == Y_0_TOP) {
  94       /* invert Y for src */
  95       srcY0 = readFB->Height - srcY0;
  96       srcY1 = readFB->Height - srcY1;
  97    }
  98
  99    if (srcY0 > srcY1 && dstY0 > dstY1) {
 100       /* Both src and dst are upside down.  Swap Y to make it
 101        * right-side up to increase odds of using a fast path.
 102        * Recall that all Gallium raster coords have Y=0=top.
 103        */
 104       GLint tmp;
 105       tmp = srcY0;
 106       srcY0 = srcY1;
 107       srcY1 = tmp;
 108       tmp = dstY0;
 109       dstY0 = dstY1;
 110       dstY1 = tmp;
 111    }
 112
 113    if (mask & GL_COLOR_BUFFER_BIT) {
 114       struct gl_renderbuffer_attachment *srcAtt =
 115          &readFB->Attachment[readFB->_ColorReadBufferIndex];
 116
 117       if(srcAtt->Type == GL_TEXTURE) {
 118          struct pipe_screen *screen = ctx->st->pipe->screen;
 119          const struct st_texture_object *srcObj =
 120             st_texture_object(srcAtt->Texture);
 121          struct st_renderbuffer *dstRb =
 122             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 123          struct pipe_surface *srcSurf;
 124          struct pipe_surface *dstSurf = dstRb->surface;
 125
 126          if (!srcObj->pt)
 127             return;
 128
 129          srcSurf = screen->get_tex_surface(screen,
 130                                            srcObj->pt,
 131                                            srcAtt->CubeMapFace,
 132                                            srcAtt->TextureLevel,
 133                                            srcAtt->Zoffset,
 134                                            PIPE_BUFFER_USAGE_GPU_READ);
 135          if(!srcSurf)
 136             return;
 137
 138          util_blit_pixels(st->blit,
 139                           srcSurf, srcX0, srcY0, srcX1, srcY1,
 140                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 141                           0.0, pFilter);
 142
 143          pipe_surface_reference(&srcSurf, NULL);
 144       }
 145       else {
 146          struct st_renderbuffer *srcRb =
 147             st_renderbuffer(readFB->_ColorReadBuffer);
 148          struct st_renderbuffer *dstRb =
 149             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 150          struct pipe_surface *srcSurf = srcRb->surface;
 151          struct pipe_surface *dstSurf = dstRb->surface;
 152
 153          util_blit_pixels(st->blit,
 154                           srcSurf, srcX0, srcY0, srcX1, srcY1,
 155                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 156                           0.0, pFilter);
 157       }
 158    }
 159
 160    if (mask & depthStencil) {
 161       /* depth and/or stencil blit */
 162
 163       /* get src/dst depth surfaces */
 164       struct st_renderbuffer *srcDepthRb =
 165          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 166       struct st_renderbuffer *dstDepthRb =
 167          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 168       struct pipe_surface *srcDepthSurf =
 169          srcDepthRb ? srcDepthRb->surface : NULL;
 170       struct pipe_surface *dstDepthSurf =
 171          dstDepthRb ? dstDepthRb->surface : NULL;
 172
 173       /* get src/dst stencil surfaces */
 174       struct st_renderbuffer *srcStencilRb =
 175          st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 176       struct st_renderbuffer *dstStencilRb =
 177          st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
 178       struct pipe_surface *srcStencilSurf =
 179          srcStencilRb ? srcStencilRb->surface : NULL;
 180       struct pipe_surface *dstStencilSurf =
 181          dstStencilRb ? dstStencilRb->surface : NULL;
 182
 183       if ((mask & depthStencil) == depthStencil &&
 184           srcDepthSurf == srcStencilSurf &&
 185           dstDepthSurf == dstStencilSurf) {
 186          /* Blitting depth and stencil values between combined
 187           * depth/stencil buffers.  This is the ideal case for such buffers.
 188           */
 189          util_blit_pixels(st->blit,
 190                           srcDepthSurf, srcX0, srcY0, srcX1, srcY1,
 191                           dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
 192                           0.0, pFilter);
 193       }
 194       else {
 195          /* blitting depth and stencil separately */
 196
 197          if (mask & GL_DEPTH_BUFFER_BIT) {
 198             /* blit Z only */
 199             _mesa_problem(ctx, "st_BlitFramebuffer(DEPTH) not completed");
 200          }
 201
 202          if (mask & GL_STENCIL_BUFFER_BIT) {
 203             /* blit stencil only */
 204             _mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) not completed");
 205          }
 206       }
 207    }
 208 }
 209
 210
 211
 212 void
 213 st_init_blit_functions(struct dd_function_table *functions)
 214 {
 215 #if FEATURE_EXT_framebuffer_blit
 216    functions->BlitFramebuffer = st_BlitFramebuffer;
 217 #endif
 218 }