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/mfeatures.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 #include "st_atom.h"
  43
  44 #include "util/u_blit.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
  64 static void
  65 st_BlitFramebuffer(struct gl_context *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 = st_context(ctx);
  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    st_validate_state(st);
  80
  81    if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
  82                         &dstX0, &dstY0, &dstX1, &dstY1)) {
  83       return; /* nothing to draw/blit */
  84    }
  85
  86    if (st_fb_orientation(drawFB) == Y_0_TOP) {
  87       /* invert Y for dest */
  88       dstY0 = drawFB->Height - dstY0;
  89       dstY1 = drawFB->Height - dstY1;
  90    }
  91
  92    if (st_fb_orientation(readFB) == Y_0_TOP) {
  93       /* invert Y for src */
  94       srcY0 = readFB->Height - srcY0;
  95       srcY1 = readFB->Height - srcY1;
  96    }
  97
  98    if (srcY0 > srcY1 && dstY0 > dstY1) {
  99       /* Both src and dst are upside down.  Swap Y to make it
 100        * right-side up to increase odds of using a fast path.
 101        * Recall that all Gallium raster coords have Y=0=top.
 102        */
 103       GLint tmp;
 104       tmp = srcY0;
 105       srcY0 = srcY1;
 106       srcY1 = tmp;
 107       tmp = dstY0;
 108       dstY0 = dstY1;
 109       dstY1 = tmp;
 110    }
 111
 112    /* Disable conditional rendering. */
 113    if (st->render_condition) {
 114       st->pipe->render_condition(st->pipe, NULL, 0);
 115    }
 116
 117    if (mask & GL_COLOR_BUFFER_BIT) {
 118       struct gl_renderbuffer_attachment *srcAtt =
 119          &readFB->Attachment[readFB->_ColorReadBufferIndex];
 120
 121       if(srcAtt->Type == GL_TEXTURE) {
 122          struct st_texture_object *srcObj =
 123             st_texture_object(srcAtt->Texture);
 124          struct st_renderbuffer *dstRb =
 125             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 126          struct pipe_surface *dstSurf = dstRb->surface;
 127
 128          if (!srcObj->pt)
 129             goto done;
 130
 131          util_blit_pixels(st->blit, srcObj->pt, srcAtt->TextureLevel,
 132                           srcX0, srcY0, srcX1, srcY1,
 133                           srcAtt->Zoffset + srcAtt->CubeMapFace,
 134                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 135                           0.0, pFilter);
 136       }
 137       else {
 138          struct st_renderbuffer *srcRb =
 139             st_renderbuffer(readFB->_ColorReadBuffer);
 140          struct st_renderbuffer *dstRb =
 141             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 142          struct pipe_surface *srcSurf = srcRb->surface;
 143          struct pipe_surface *dstSurf = dstRb->surface;
 144
 145          util_blit_pixels(st->blit,
 146                           srcRb->texture, srcSurf->u.tex.level,
 147                           srcX0, srcY0, srcX1, srcY1,
 148                           srcSurf->u.tex.first_layer,
 149                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 150                           0.0, pFilter);
 151       }
 152    }
 153
 154    if (mask & depthStencil) {
 155       /* depth and/or stencil blit */
 156
 157       /* get src/dst depth surfaces */
 158       struct gl_renderbuffer_attachment *srcDepth =
 159          &readFB->Attachment[BUFFER_DEPTH];
 160       struct gl_renderbuffer_attachment *dstDepth =
 161          &drawFB->Attachment[BUFFER_DEPTH];
 162       struct gl_renderbuffer_attachment *srcStencil =
 163          &readFB->Attachment[BUFFER_STENCIL];
 164       struct gl_renderbuffer_attachment *dstStencil =
 165          &drawFB->Attachment[BUFFER_STENCIL];
 166
 167       struct st_renderbuffer *srcDepthRb =
 168          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 169       struct st_renderbuffer *dstDepthRb =
 170          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 171       struct pipe_surface *dstDepthSurf =
 172          dstDepthRb ? dstDepthRb->surface : NULL;
 173
 174       if ((mask & depthStencil) == depthStencil &&
 175           st_is_depth_stencil_combined(srcDepth, srcStencil) &&
 176           st_is_depth_stencil_combined(dstDepth, dstStencil)) {
 177
 178          /* Blitting depth and stencil values between combined
 179           * depth/stencil buffers.  This is the ideal case for such buffers.
 180           */
 181          util_blit_pixels(st->blit,
 182                           srcDepthRb->texture,
 183                           srcDepthRb->surface->u.tex.level,
 184                           srcX0, srcY0, srcX1, srcY1,
 185                           srcDepthRb->surface->u.tex.first_layer,
 186                           dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
 187                           0.0, pFilter);
 188       }
 189       else {
 190          /* blitting depth and stencil separately */
 191
 192          if (mask & GL_DEPTH_BUFFER_BIT) {
 193             util_blit_pixels(st->blit, srcDepthRb->texture,
 194                              srcDepthRb->surface->u.tex.level,
 195                              srcX0, srcY0, srcX1, srcY1,
 196                              srcDepthRb->surface->u.tex.first_layer,
 197                              dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
 198                              0.0, pFilter);
 199          }
 200
 201          if (mask & GL_STENCIL_BUFFER_BIT) {
 202             /* blit stencil only */
 203             _mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) not completed");
 204          }
 205       }
 206    }
 207
 208 done:
 209    /* Restore conditional rendering state. */
 210    if (st->render_condition) {
 211       st->pipe->render_condition(st->pipe, st->render_condition,
 212                                  st->condition_mode);
 213    }
 214 }
 215
 216
 217 void
 218 st_init_blit_functions(struct dd_function_table *functions)
 219 {
 220    functions->BlitFramebuffer = st_BlitFramebuffer;
 221 }
 222
 223 #endif /* FEATURE_EXT_framebuffer_blit */