src/mesa/state_tracker/st_cb_blit.c - platform/external/mesa3d - Git at Google

 /**************************************************************************
  *
  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
  * without limitation the rights to use, copy, modify, merge, publish,
  * distribute, sub license, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
  *
  * The above copyright notice and this permission notice (including the
  * next paragraph) shall be included in all copies or substantial portions
  * of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
  **************************************************************************/

  /*
   * Authors:
   *   Brian Paul
   */

 #include "main/imports.h"
 #include "main/image.h"
 #include "main/macros.h"
 #include "main/mfeatures.h"

 #include "st_context.h"
 #include "st_texture.h"
 #include "st_cb_blit.h"
 #include "st_cb_fbo.h"
 #include "st_atom.h"

 #include "util/u_blit.h"


 void
 st_init_blit(struct st_context *st)
 {
    st->blit = util_create_blit(st->pipe, st->cso_context);
 }


 void
 st_destroy_blit(struct st_context *st)
 {
    util_destroy_blit(st->blit);
    st->blit = NULL;
 }


 #if FEATURE_EXT_framebuffer_blit

 static void
 st_BlitFramebuffer_resolve(struct gl_context *ctx,
                            GLbitfield mask,
                            struct pipe_resolve_info *info)
 {
    const GLbitfield depthStencil = GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT;

    struct st_context *st = st_context(ctx);

    struct st_renderbuffer *srcRb, *dstRb;

    if (mask & GL_COLOR_BUFFER_BIT) {
       srcRb = st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
       dstRb = st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);

       info->mask = PIPE_MASK_RGBA;

       info->src.res = srcRb->texture;
       info->src.layer = srcRb->surface->u.tex.first_layer;
       info->dst.res = dstRb->texture;
       info->dst.level = dstRb->surface->u.tex.level;
       info->dst.layer = dstRb->surface->u.tex.first_layer;

       st->pipe->resource_resolve(st->pipe, info);
    }

    if (mask & depthStencil) {
       struct gl_renderbuffer_attachment *srcDepth, *srcStencil;
       struct gl_renderbuffer_attachment *dstDepth, *dstStencil;
       boolean combined;

       srcDepth = &ctx->ReadBuffer->Attachment[BUFFER_DEPTH];
       dstDepth = &ctx->DrawBuffer->Attachment[BUFFER_DEPTH];
       srcStencil = &ctx->ReadBuffer->Attachment[BUFFER_STENCIL];
       dstStencil = &ctx->DrawBuffer->Attachment[BUFFER_STENCIL];

       combined =
          st_is_depth_stencil_combined(srcDepth, srcStencil) &&
          st_is_depth_stencil_combined(dstDepth, dstStencil);

       if ((mask & GL_DEPTH_BUFFER_BIT) || combined) {
          /* resolve depth and, if combined and requested, stencil as well */
          srcRb = st_renderbuffer(srcDepth->Renderbuffer);
          dstRb = st_renderbuffer(dstDepth->Renderbuffer);

          info->mask = (mask & GL_DEPTH_BUFFER_BIT) ? PIPE_MASK_Z : 0;
          if (combined && (mask & GL_STENCIL_BUFFER_BIT)) {
             mask &= ~GL_STENCIL_BUFFER_BIT;
             info->mask |= PIPE_MASK_S;
          }

          info->src.res = srcRb->texture;
          info->src.layer = srcRb->surface->u.tex.first_layer;
          info->dst.res = dstRb->texture;
          info->dst.level = dstRb->surface->u.tex.level;
          info->dst.layer = dstRb->surface->u.tex.first_layer;

          st->pipe->resource_resolve(st->pipe, info);
       }

       if (mask & GL_STENCIL_BUFFER_BIT) {
          /* resolve separate stencil buffer */
          srcRb = st_renderbuffer(srcStencil->Renderbuffer);
          dstRb = st_renderbuffer(dstStencil->Renderbuffer);

          info->mask = PIPE_MASK_S;

          info->src.res = srcRb->texture;
          info->src.layer = srcRb->surface->u.tex.first_layer;
          info->dst.res = dstRb->texture;
          info->dst.level = dstRb->surface->u.tex.level;
          info->dst.layer = dstRb->surface->u.tex.first_layer;

          st->pipe->resource_resolve(st->pipe, info);
       }
    }
 }

 static void
 st_BlitFramebuffer(struct gl_context *ctx,
                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
                    GLbitfield mask, GLenum filter)
 {
    const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
                                     GL_STENCIL_BUFFER_BIT);
    struct st_context *st = st_context(ctx);
    const uint pFilter = ((filter == GL_NEAREST)
                          ? PIPE_TEX_MIPFILTER_NEAREST
                          : PIPE_TEX_MIPFILTER_LINEAR);
    struct gl_framebuffer *readFB = ctx->ReadBuffer;
    struct gl_framebuffer *drawFB = ctx->DrawBuffer;

    st_validate_state(st);

    if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
                         &dstX0, &dstY0, &dstX1, &dstY1)) {
       return; /* nothing to draw/blit */
    }

    if (st_fb_orientation(drawFB) == Y_0_TOP) {
       /* invert Y for dest */
       dstY0 = drawFB->Height - dstY0;
       dstY1 = drawFB->Height - dstY1;
    }

    if (st_fb_orientation(readFB) == Y_0_TOP) {
       /* invert Y for src */
       srcY0 = readFB->Height - srcY0;
       srcY1 = readFB->Height - srcY1;
    }

    /* Disable conditional rendering. */
    if (st->render_condition) {
       st->pipe->render_condition(st->pipe, NULL, 0);
    }

    if (readFB->Visual.sampleBuffers > drawFB->Visual.sampleBuffers &&
        readFB->Visual.samples > 1) {
       struct pipe_resolve_info info;

       if (dstX0 < dstX1) {
          info.dst.x0 = dstX0;
          info.dst.x1 = dstX1;
          info.src.x0 = srcX0;
          info.src.x1 = srcX1;
       } else {
          info.dst.x0 = dstX1;
          info.dst.x1 = dstX0;
          info.src.x0 = srcX1;
          info.src.x1 = srcX0;
       }
       if (dstY0 < dstY1) {
          info.dst.y0 = dstY0;
          info.dst.y1 = dstY1;
          info.src.y0 = srcY0;
          info.src.y1 = srcY1;
       } else {
          info.dst.y0 = dstY1;
          info.dst.y1 = dstY0;
          info.src.y0 = srcY1;
          info.src.y1 = srcY0;
       }

       st_BlitFramebuffer_resolve(ctx, mask, &info); /* filter doesn't apply */

       goto done;
    }

    if (srcY0 > srcY1 && dstY0 > dstY1) {
       /* Both src and dst are upside down.  Swap Y to make it
        * right-side up to increase odds of using a fast path.
        * Recall that all Gallium raster coords have Y=0=top.
        */
       GLint tmp;
       tmp = srcY0;
       srcY0 = srcY1;
       srcY1 = tmp;
       tmp = dstY0;
       dstY0 = dstY1;
       dstY1 = tmp;
    }

    if (mask & GL_COLOR_BUFFER_BIT) {
       struct gl_renderbuffer_attachment *srcAtt =
          &readFB->Attachment[readFB->_ColorReadBufferIndex];

       if(srcAtt->Type == GL_TEXTURE) {
          struct st_texture_object *srcObj =
             st_texture_object(srcAtt->Texture);
          struct st_renderbuffer *dstRb =
             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
          struct pipe_surface *dstSurf = dstRb->surface;

          if (!srcObj->pt)
             goto done;

          util_blit_pixels(st->blit, srcObj->pt, srcAtt->TextureLevel,
                           srcX0, srcY0, srcX1, srcY1,
                           srcAtt->Zoffset + srcAtt->CubeMapFace,
                           dstSurf, dstX0, dstY0, dstX1, dstY1,
                           0.0, pFilter, TGSI_WRITEMASK_XYZW, 0);
       }
       else {
          struct st_renderbuffer *srcRb =
             st_renderbuffer(readFB->_ColorReadBuffer);
          struct st_renderbuffer *dstRb =
             st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
          struct pipe_surface *srcSurf = srcRb->surface;
          struct pipe_surface *dstSurf = dstRb->surface;

          util_blit_pixels(st->blit,
                           srcRb->texture, srcSurf->u.tex.level,
                           srcX0, srcY0, srcX1, srcY1,
                           srcSurf->u.tex.first_layer,
                           dstSurf, dstX0, dstY0, dstX1, dstY1,
                           0.0, pFilter, TGSI_WRITEMASK_XYZW, 0);
       }
    }

    if (mask & depthStencil) {
       /* depth and/or stencil blit */

       /* get src/dst depth surfaces */
       struct gl_renderbuffer_attachment *srcDepth =
          &readFB->Attachment[BUFFER_DEPTH];
       struct gl_renderbuffer_attachment *dstDepth =
          &drawFB->Attachment[BUFFER_DEPTH];
       struct gl_renderbuffer_attachment *srcStencil =
          &readFB->Attachment[BUFFER_STENCIL];
       struct gl_renderbuffer_attachment *dstStencil =
          &drawFB->Attachment[BUFFER_STENCIL];

       struct st_renderbuffer *srcDepthRb =
          st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
       struct st_renderbuffer *dstDepthRb =
          st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
       struct pipe_surface *dstDepthSurf =
          dstDepthRb ? dstDepthRb->surface : NULL;

       struct st_renderbuffer *srcStencilRb =
          st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
       struct st_renderbuffer *dstStencilRb =
          st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
       struct pipe_surface *dstStencilSurf =
          dstStencilRb ? dstStencilRb->surface : NULL;

       if ((mask & depthStencil) == depthStencil &&
           st_is_depth_stencil_combined(srcDepth, srcStencil) &&
           st_is_depth_stencil_combined(dstDepth, dstStencil)) {

          /* Blitting depth and stencil values between combined
           * depth/stencil buffers.  This is the ideal case for such buffers.
           */
          util_blit_pixels(st->blit,
                           srcDepthRb->texture,
                           srcDepthRb->surface->u.tex.level,
                           srcX0, srcY0, srcX1, srcY1,
                           srcDepthRb->surface->u.tex.first_layer,
                           dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
                           0.0, pFilter, 0,
                           BLIT_WRITEMASK_Z |
                           (st->has_stencil_export ? BLIT_WRITEMASK_STENCIL
                                                   : 0));

          if (!st->has_stencil_export) {
             _mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) "
                                "software fallback not implemented");
          }
       }
       else {
          /* blitting depth and stencil separately */

          if (mask & GL_DEPTH_BUFFER_BIT) {
             util_blit_pixels(st->blit, srcDepthRb->texture,
                              srcDepthRb->surface->u.tex.level,
                              srcX0, srcY0, srcX1, srcY1,
                              srcDepthRb->surface->u.tex.first_layer,
                              dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
                              0.0, pFilter, 0, BLIT_WRITEMASK_Z);
          }

          if (mask & GL_STENCIL_BUFFER_BIT) {
             if (st->has_stencil_export) {
                util_blit_pixels(st->blit, srcStencilRb->texture,
                                 srcStencilRb->surface->u.tex.level,
                                 srcX0, srcY0, srcX1, srcY1,
                                 srcStencilRb->surface->u.tex.first_layer,
                                 dstStencilSurf, dstX0, dstY0, dstX1, dstY1,
                                 0.0, pFilter, 0, BLIT_WRITEMASK_STENCIL);
             }
             else {
                _mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) "
                                   "software fallback not implemented");
             }
          }
       }
    }

 done:
    /* Restore conditional rendering state. */
    if (st->render_condition) {
       st->pipe->render_condition(st->pipe, st->render_condition,
                                  st->condition_mode);
    }
 }


 void
 st_init_blit_functions(struct dd_function_table *functions)
 {
    functions->BlitFramebuffer = st_BlitFramebuffer;
 }

 #endif /* FEATURE_EXT_framebuffer_blit */
	/**************************************************************************
	*
	* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
	* All Rights Reserved.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the
	* "Software"), to deal in the Software without restriction, including
	* without limitation the rights to use, copy, modify, merge, publish,
	* distribute, sub license, and/or sell copies of the Software, and to
	* permit persons to whom the Software is furnished to do so, subject to
	* the following conditions:
	*
	* The above copyright notice and this permission notice (including the
	* next paragraph) shall be included in all copies or substantial portions
	* of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
	* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
	* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
	* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
	* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	*
	**************************************************************************/

	/*
	* Authors:
	* Brian Paul
	*/

	#include "main/imports.h"
	#include "main/image.h"
	#include "main/macros.h"
	#include "main/mfeatures.h"

	#include "st_context.h"
	#include "st_texture.h"
	#include "st_cb_blit.h"
	#include "st_cb_fbo.h"
	#include "st_atom.h"

	#include "util/u_blit.h"


	void
	st_init_blit(struct st_context *st)
	{
	st->blit = util_create_blit(st->pipe, st->cso_context);
	}


	void
	st_destroy_blit(struct st_context *st)
	{
	util_destroy_blit(st->blit);
	st->blit = NULL;
	}


	#if FEATURE_EXT_framebuffer_blit

	static void
	st_BlitFramebuffer_resolve(struct gl_context *ctx,
	GLbitfield mask,
	struct pipe_resolve_info *info)
	{
	const GLbitfield depthStencil = GL_DEPTH_BUFFER_BIT \| GL_STENCIL_BUFFER_BIT;

	struct st_context *st = st_context(ctx);

	struct st_renderbuffer srcRb, dstRb;

	if (mask & GL_COLOR_BUFFER_BIT) {
	srcRb = st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
	dstRb = st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);

	info->mask = PIPE_MASK_RGBA;

	info->src.res = srcRb->texture;
	info->src.layer = srcRb->surface->u.tex.first_layer;
	info->dst.res = dstRb->texture;
	info->dst.level = dstRb->surface->u.tex.level;
	info->dst.layer = dstRb->surface->u.tex.first_layer;

	st->pipe->resource_resolve(st->pipe, info);
	}

	if (mask & depthStencil) {
	struct gl_renderbuffer_attachment srcDepth, srcStencil;
	struct gl_renderbuffer_attachment dstDepth, dstStencil;
	boolean combined;

	srcDepth = &ctx->ReadBuffer->Attachment[BUFFER_DEPTH];
	dstDepth = &ctx->DrawBuffer->Attachment[BUFFER_DEPTH];
	srcStencil = &ctx->ReadBuffer->Attachment[BUFFER_STENCIL];
	dstStencil = &ctx->DrawBuffer->Attachment[BUFFER_STENCIL];

	combined =
	st_is_depth_stencil_combined(srcDepth, srcStencil) &&
	st_is_depth_stencil_combined(dstDepth, dstStencil);

	if ((mask & GL_DEPTH_BUFFER_BIT) \|\| combined) {
	/* resolve depth and, if combined and requested, stencil as well */
	srcRb = st_renderbuffer(srcDepth->Renderbuffer);
	dstRb = st_renderbuffer(dstDepth->Renderbuffer);

	info->mask = (mask & GL_DEPTH_BUFFER_BIT) ? PIPE_MASK_Z : 0;
	if (combined && (mask & GL_STENCIL_BUFFER_BIT)) {
	mask &= ~GL_STENCIL_BUFFER_BIT;
	info->mask \|= PIPE_MASK_S;
	}

	info->src.res = srcRb->texture;
	info->src.layer = srcRb->surface->u.tex.first_layer;
	info->dst.res = dstRb->texture;
	info->dst.level = dstRb->surface->u.tex.level;
	info->dst.layer = dstRb->surface->u.tex.first_layer;

	st->pipe->resource_resolve(st->pipe, info);
	}

	if (mask & GL_STENCIL_BUFFER_BIT) {
	/* resolve separate stencil buffer */
	srcRb = st_renderbuffer(srcStencil->Renderbuffer);
	dstRb = st_renderbuffer(dstStencil->Renderbuffer);

	info->mask = PIPE_MASK_S;

	info->src.res = srcRb->texture;
	info->src.layer = srcRb->surface->u.tex.first_layer;
	info->dst.res = dstRb->texture;
	info->dst.level = dstRb->surface->u.tex.level;
	info->dst.layer = dstRb->surface->u.tex.first_layer;

	st->pipe->resource_resolve(st->pipe, info);
	}
	}
	}

	static void
	st_BlitFramebuffer(struct gl_context *ctx,
	GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
	GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
	GLbitfield mask, GLenum filter)
	{
	const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT \|
	GL_STENCIL_BUFFER_BIT);
	struct st_context *st = st_context(ctx);
	const uint pFilter = ((filter == GL_NEAREST)
	? PIPE_TEX_MIPFILTER_NEAREST
	: PIPE_TEX_MIPFILTER_LINEAR);
	struct gl_framebuffer *readFB = ctx->ReadBuffer;
	struct gl_framebuffer *drawFB = ctx->DrawBuffer;

	st_validate_state(st);

	if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
	&dstX0, &dstY0, &dstX1, &dstY1)) {
	return; /* nothing to draw/blit */
	}

	if (st_fb_orientation(drawFB) == Y_0_TOP) {
	/* invert Y for dest */
	dstY0 = drawFB->Height - dstY0;
	dstY1 = drawFB->Height - dstY1;
	}

	if (st_fb_orientation(readFB) == Y_0_TOP) {
	/* invert Y for src */
	srcY0 = readFB->Height - srcY0;
	srcY1 = readFB->Height - srcY1;
	}

	/* Disable conditional rendering. */
	if (st->render_condition) {
	st->pipe->render_condition(st->pipe, NULL, 0);
	}

	if (readFB->Visual.sampleBuffers > drawFB->Visual.sampleBuffers &&
	readFB->Visual.samples > 1) {
	struct pipe_resolve_info info;

	if (dstX0 < dstX1) {
	info.dst.x0 = dstX0;
	info.dst.x1 = dstX1;
	info.src.x0 = srcX0;
	info.src.x1 = srcX1;
	} else {
	info.dst.x0 = dstX1;
	info.dst.x1 = dstX0;
	info.src.x0 = srcX1;
	info.src.x1 = srcX0;
	}
	if (dstY0 < dstY1) {
	info.dst.y0 = dstY0;
	info.dst.y1 = dstY1;
	info.src.y0 = srcY0;
	info.src.y1 = srcY1;
	} else {
	info.dst.y0 = dstY1;
	info.dst.y1 = dstY0;
	info.src.y0 = srcY1;
	info.src.y1 = srcY0;
	}

	st_BlitFramebuffer_resolve(ctx, mask, &info); /* filter doesn't apply */

	goto done;
	}

	if (srcY0 > srcY1 && dstY0 > dstY1) {
	/* Both src and dst are upside down. Swap Y to make it
	* right-side up to increase odds of using a fast path.
	* Recall that all Gallium raster coords have Y=0=top.
	*/
	GLint tmp;
	tmp = srcY0;
	srcY0 = srcY1;
	srcY1 = tmp;
	tmp = dstY0;
	dstY0 = dstY1;
	dstY1 = tmp;
	}

	if (mask & GL_COLOR_BUFFER_BIT) {
	struct gl_renderbuffer_attachment *srcAtt =
	&readFB->Attachment[readFB->_ColorReadBufferIndex];

	if(srcAtt->Type == GL_TEXTURE) {
	struct st_texture_object *srcObj =
	st_texture_object(srcAtt->Texture);
	struct st_renderbuffer *dstRb =
	st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
	struct pipe_surface *dstSurf = dstRb->surface;

	if (!srcObj->pt)
	goto done;

	util_blit_pixels(st->blit, srcObj->pt, srcAtt->TextureLevel,
	srcX0, srcY0, srcX1, srcY1,
	srcAtt->Zoffset + srcAtt->CubeMapFace,
	dstSurf, dstX0, dstY0, dstX1, dstY1,
	0.0, pFilter, TGSI_WRITEMASK_XYZW, 0);
	}
	else {
	struct st_renderbuffer *srcRb =
	st_renderbuffer(readFB->_ColorReadBuffer);
	struct st_renderbuffer *dstRb =
	st_renderbuffer(drawFB->_ColorDrawBuffers[0]);
	struct pipe_surface *srcSurf = srcRb->surface;
	struct pipe_surface *dstSurf = dstRb->surface;

	util_blit_pixels(st->blit,
	srcRb->texture, srcSurf->u.tex.level,
	srcX0, srcY0, srcX1, srcY1,
	srcSurf->u.tex.first_layer,
	dstSurf, dstX0, dstY0, dstX1, dstY1,
	0.0, pFilter, TGSI_WRITEMASK_XYZW, 0);
	}
	}

	if (mask & depthStencil) {
	/* depth and/or stencil blit */

	/* get src/dst depth surfaces */
	struct gl_renderbuffer_attachment *srcDepth =
	&readFB->Attachment[BUFFER_DEPTH];
	struct gl_renderbuffer_attachment *dstDepth =
	&drawFB->Attachment[BUFFER_DEPTH];
	struct gl_renderbuffer_attachment *srcStencil =
	&readFB->Attachment[BUFFER_STENCIL];
	struct gl_renderbuffer_attachment *dstStencil =
	&drawFB->Attachment[BUFFER_STENCIL];

	struct st_renderbuffer *srcDepthRb =
	st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
	struct st_renderbuffer *dstDepthRb =
	st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
	struct pipe_surface *dstDepthSurf =
	dstDepthRb ? dstDepthRb->surface : NULL;

	struct st_renderbuffer *srcStencilRb =
	st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
	struct st_renderbuffer *dstStencilRb =
	st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
	struct pipe_surface *dstStencilSurf =
	dstStencilRb ? dstStencilRb->surface : NULL;

	if ((mask & depthStencil) == depthStencil &&
	st_is_depth_stencil_combined(srcDepth, srcStencil) &&
	st_is_depth_stencil_combined(dstDepth, dstStencil)) {

	/* Blitting depth and stencil values between combined
	* depth/stencil buffers. This is the ideal case for such buffers.
	*/
	util_blit_pixels(st->blit,
	srcDepthRb->texture,
	srcDepthRb->surface->u.tex.level,
	srcX0, srcY0, srcX1, srcY1,
	srcDepthRb->surface->u.tex.first_layer,
	dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
	0.0, pFilter, 0,
	BLIT_WRITEMASK_Z \|
	(st->has_stencil_export ? BLIT_WRITEMASK_STENCIL
	: 0));

	if (!st->has_stencil_export) {
	_mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) "
	"software fallback not implemented");
	}
	}
	else {
	/* blitting depth and stencil separately */

	if (mask & GL_DEPTH_BUFFER_BIT) {
	util_blit_pixels(st->blit, srcDepthRb->texture,
	srcDepthRb->surface->u.tex.level,
	srcX0, srcY0, srcX1, srcY1,
	srcDepthRb->surface->u.tex.first_layer,
	dstDepthSurf, dstX0, dstY0, dstX1, dstY1,
	0.0, pFilter, 0, BLIT_WRITEMASK_Z);
	}

	if (mask & GL_STENCIL_BUFFER_BIT) {
	if (st->has_stencil_export) {
	util_blit_pixels(st->blit, srcStencilRb->texture,
	srcStencilRb->surface->u.tex.level,
	srcX0, srcY0, srcX1, srcY1,
	srcStencilRb->surface->u.tex.first_layer,
	dstStencilSurf, dstX0, dstY0, dstX1, dstY1,
	0.0, pFilter, 0, BLIT_WRITEMASK_STENCIL);
	}
	else {
	_mesa_problem(ctx, "st_BlitFramebuffer(STENCIL) "
	"software fallback not implemented");
	}
	}
	}
	}

	done:
	/* Restore conditional rendering state. */
	if (st->render_condition) {
	st->pipe->render_condition(st->pipe, st->render_condition,
	st->condition_mode);
	}
	}


	void
	st_init_blit_functions(struct dd_function_table *functions)
	{
	functions->BlitFramebuffer = st_BlitFramebuffer;
	}

	#endif /* FEATURE_EXT_framebuffer_blit */