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_resolve(struct gl_context *ctx,
  66                            GLbitfield mask,
  67                            struct pipe_resolve_info *info)
  68 {
  69    const GLbitfield depthStencil = GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT;
  70
  71    struct st_context *st = st_context(ctx);
  72
  73    struct st_renderbuffer *srcRb, *dstRb;
  74
  75    if (mask & GL_COLOR_BUFFER_BIT) {
  76       srcRb = st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
  77       dstRb = st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
  78
  79       info->mask = PIPE_MASK_RGBA;
  80
  81       info->src.res = srcRb->texture;
  82       info->src.layer = srcRb->surface->u.tex.first_layer;
  83       info->dst.res = dstRb->texture;
  84       info->dst.level = dstRb->surface->u.tex.level;
  85       info->dst.layer = dstRb->surface->u.tex.first_layer;
  86
  87       st->pipe->resource_resolve(st->pipe, info);
  88    }
  89
  90    if (mask & depthStencil) {
  91       struct gl_renderbuffer_attachment *srcDepth, *srcStencil;
  92       struct gl_renderbuffer_attachment *dstDepth, *dstStencil;
  93       boolean combined;
  94
  95       srcDepth = &ctx->ReadBuffer->Attachment[BUFFER_DEPTH];
  96       dstDepth = &ctx->DrawBuffer->Attachment[BUFFER_DEPTH];
  97       srcStencil = &ctx->ReadBuffer->Attachment[BUFFER_STENCIL];
  98       dstStencil = &ctx->DrawBuffer->Attachment[BUFFER_STENCIL];
  99
 100       combined =
 101          st_is_depth_stencil_combined(srcDepth, srcStencil) &&
 102          st_is_depth_stencil_combined(dstDepth, dstStencil);
 103
 104       if ((mask & GL_DEPTH_BUFFER_BIT) || combined) {
 105          /* resolve depth and, if combined and requested, stencil as well */
 106          srcRb = st_renderbuffer(srcDepth->Renderbuffer);
 107          dstRb = st_renderbuffer(dstDepth->Renderbuffer);
 108
 109          info->mask = (mask & GL_DEPTH_BUFFER_BIT) ? PIPE_MASK_Z : 0;
 110          if (combined && (mask & GL_STENCIL_BUFFER_BIT)) {
 111             mask &= ~GL_STENCIL_BUFFER_BIT;
 112             info->mask |= PIPE_MASK_S;
 113          }
 114
 115          info->src.res = srcRb->texture;
 116          info->src.layer = srcRb->surface->u.tex.first_layer;
 117          info->dst.res = dstRb->texture;
 118          info->dst.level = dstRb->surface->u.tex.level;
 119          info->dst.layer = dstRb->surface->u.tex.first_layer;
 120
 121          st->pipe->resource_resolve(st->pipe, info);
 122       }
 123
 124       if (mask & GL_STENCIL_BUFFER_BIT) {
 125          /* resolve separate stencil buffer */
 126          srcRb = st_renderbuffer(srcStencil->Renderbuffer);
 127          dstRb = st_renderbuffer(dstStencil->Renderbuffer);
 128
 129          info->mask = PIPE_MASK_S;
 130
 131          info->src.res = srcRb->texture;
 132          info->src.layer = srcRb->surface->u.tex.first_layer;
 133          info->dst.res = dstRb->texture;
 134          info->dst.level = dstRb->surface->u.tex.level;
 135          info->dst.layer = dstRb->surface->u.tex.first_layer;
 136
 137          st->pipe->resource_resolve(st->pipe, info);
 138       }
 139    }
 140 }
 141
 142 static void
 143 st_BlitFramebuffer(struct gl_context *ctx,
 144                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
 145                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
 146                    GLbitfield mask, GLenum filter)
 147 {
 148    const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
 149                                     GL_STENCIL_BUFFER_BIT);
 150    struct st_context *st = st_context(ctx);
 151    const uint pFilter = ((filter == GL_NEAREST)
 152                          ? PIPE_TEX_MIPFILTER_NEAREST
 153                          : PIPE_TEX_MIPFILTER_LINEAR);
 154    struct gl_framebuffer *readFB = ctx->ReadBuffer;
 155    struct gl_framebuffer *drawFB = ctx->DrawBuffer;
 156
 157    st_validate_state(st);
 158
 159    if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
 160                         &dstX0, &dstY0, &dstX1, &dstY1)) {
 161       return; /* nothing to draw/blit */
 162    }
 163
 164    if (st_fb_orientation(drawFB) == Y_0_TOP) {
 165       /* invert Y for dest */
 166       dstY0 = drawFB->Height - dstY0;
 167       dstY1 = drawFB->Height - dstY1;
 168    }
 169
 170    if (st_fb_orientation(readFB) == Y_0_TOP) {
 171       /* invert Y for src */
 172       srcY0 = readFB->Height - srcY0;
 173       srcY1 = readFB->Height - srcY1;
 174    }
 175
 176    /* Disable conditional rendering. */
 177    if (st->render_condition) {
 178       st->pipe->render_condition(st->pipe, NULL, 0);
 179    }
 180
 181    if (readFB->Visual.sampleBuffers > drawFB->Visual.sampleBuffers &&
 182        readFB->Visual.samples > 1) {
 183       struct pipe_resolve_info info;
 184
 185       if (dstX0 < dstX1) {
 186          info.dst.x0 = dstX0;
 187          info.dst.x1 = dstX1;
 188          info.src.x0 = srcX0;
 189          info.src.x1 = srcX1;
 190       } else {
 191          info.dst.x0 = dstX1;
 192          info.dst.x1 = dstX0;
 193          info.src.x0 = srcX1;
 194          info.src.x1 = srcX0;
 195       }
 196       if (dstY0 < dstY1) {
 197          info.dst.y0 = dstY0;
 198          info.dst.y1 = dstY1;
 199          info.src.y0 = srcY0;
 200          info.src.y1 = srcY1;
 201       } else {
 202          info.dst.y0 = dstY1;
 203          info.dst.y1 = dstY0;
 204          info.src.y0 = srcY1;
 205          info.src.y1 = srcY0;
 206       }
 207
 208       st_BlitFramebuffer_resolve(ctx, mask, &info); /* filter doesn't apply */
 209
 210       goto done;
 211    }
 212
 213    if (srcY0 > srcY1 && dstY0 > dstY1) {
 214       /* Both src and dst are upside down.  Swap Y to make it
 215        * right-side up to increase odds of using a fast path.
 216        * Recall that all Gallium raster coords have Y=0=top.
 217        */
 218       GLint tmp;
 219       tmp = srcY0;
 220       srcY0 = srcY1;
 221       srcY1 = tmp;
 222       tmp = dstY0;
 223       dstY0 = dstY1;
 224       dstY1 = tmp;
 225    }
 226
 227    if (mask & GL_COLOR_BUFFER_BIT) {
 228       struct gl_renderbuffer_attachment *srcAtt =
 229          &readFB->Attachment[readFB->_ColorReadBufferIndex];
 230
 231       if(srcAtt->Type == GL_TEXTURE) {
 232          struct st_texture_object *srcObj =
 233             st_texture_object(srcAtt->Texture);
 234          struct st_renderbuffer *dstRb =
 235             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 236          struct pipe_surface *dstSurf = dstRb->surface;
 237
 238          if (!srcObj->pt)
 239             goto done;
 240
 241          util_blit_pixels(st->blit, srcObj->pt, srcAtt->TextureLevel,
 242                           srcX0, srcY0, srcX1, srcY1,
 243                           srcAtt->Zoffset + srcAtt->CubeMapFace,
 244                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 245                           0.0, pFilter);
 246       }
 247       else {
 248          struct st_renderbuffer *srcRb =
 249             st_renderbuffer(readFB->_ColorReadBuffer);
 250          struct st_renderbuffer *dstRb =
 251             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
 252          struct pipe_surface *srcSurf = srcRb->surface;
 253          struct pipe_surface *dstSurf = dstRb->surface;
 254
 255          util_blit_pixels(st->blit,
 256                           srcRb->texture, srcSurf->u.tex.level,
 257                           srcX0, srcY0, srcX1, srcY1,
 258                           srcSurf->u.tex.first_layer,
 259                           dstSurf, dstX0, dstY0, dstX1, dstY1,
 260                           0.0, pFilter);
 261       }
 262    }
 263
 264    if (mask & depthStencil) {
 265       /* depth and/or stencil blit */
 266
 267       /* get src/dst depth surfaces */
 268       struct gl_renderbuffer_attachment *srcDepth =
 269          &readFB->Attachment[BUFFER_DEPTH];
 270       struct gl_renderbuffer_attachment *dstDepth =
 271          &drawFB->Attachment[BUFFER_DEPTH];
 272       struct gl_renderbuffer_attachment *srcStencil =
 273          &readFB->Attachment[BUFFER_STENCIL];
 274       struct gl_renderbuffer_attachment *dstStencil =
 275          &drawFB->Attachment[BUFFER_STENCIL];
 276
 277       struct st_renderbuffer *srcDepthRb =
 278          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 279       struct st_renderbuffer *dstDepthRb =
 280          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
 281       struct pipe_surface *dstDepthSurf =
 282          dstDepthRb ? dstDepthRb->surface : NULL;
 283
 284       if ((mask & depthStencil) == depthStencil &&
 285           st_is_depth_stencil_combined(srcDepth, srcStencil) &&
 286           st_is_depth_stencil_combined(dstDepth, dstStencil)) {
 287
 288          /* Blitting depth and stencil values between combined
 289           * depth/stencil buffers.  This is the ideal case for such buffers.
 290           */
 291          util_blit_pixels(st->blit,
 292                           srcDepthRb->texture,
 293                           srcDepthRb->surface->u.tex.level,
 294                           srcX0, srcY0, srcX1, srcY1,
 295                           srcDepthRb->surface->u.tex.first_layer,
 296                           dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
 297                           0.0, pFilter);
 298       }
 299       else {
 300          /* blitting depth and stencil separately */
 301
 302          if (mask & GL_DEPTH_BUFFER_BIT) {
 303             util_blit_pixels(st->blit, srcDepthRb->texture,
 304                              srcDepthRb->surface->u.tex.level,
 305                              srcX0, srcY0, srcX1, srcY1,
 306                              srcDepthRb->surface->u.tex.first_layer,
 307                              dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
 308                              0.0, pFilter);
 309          }
 310
 311          if (mask & GL_STENCIL_BUFFER_BIT) {
 312             /* blit stencil only */
 313             _mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) not completed");
 314          }
 315       }
 316    }
 317
 318 done:
 319    /* Restore conditional rendering state. */
 320    if (st->render_condition) {
 321       st->pipe->render_condition(st->pipe, st->render_condition,
 322                                  st->condition_mode);
 323    }
 324 }
 325
 326
 327 void
 328 st_init_blit_functions(struct dd_function_table *functions)
 329 {
 330    functions->BlitFramebuffer = st_BlitFramebuffer;
 331 }
 332
 333 #endif /* FEATURE_EXT_framebuffer_blit */