libxtrans libX11 libX11 libXext mesa xserver git update 22 sep 2011

1 files changed, 794 insertions, 790 deletions

diff --git a/mesalib/src/gallium/auxiliary/util/u_blit.c b/mesalib/src/gallium/auxiliary/util/u_blit.c
index e892a4a77..87530e94a 100644
--- a/mesalib/src/gallium/auxiliary/util/u_blit.c
+++ b/mesalib/src/gallium/auxiliary/util/u_blit.c
@@ -1,790 +1,794 @@
-/**************************************************************************

- *

- * Copyright 2008 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.

- *

- **************************************************************************/

-

-/**

- * @file

- * Copy/blit pixel rect between surfaces

- *  

- * @author Brian Paul

- */

-

-

-#include "pipe/p_context.h"

-#include "util/u_debug.h"

-#include "pipe/p_defines.h"

-#include "util/u_inlines.h"

-#include "pipe/p_shader_tokens.h"

-#include "pipe/p_state.h"

-

-#include "util/u_blit.h"

-#include "util/u_draw_quad.h"

-#include "util/u_format.h"

-#include "util/u_math.h"

-#include "util/u_memory.h"

-#include "util/u_sampler.h"

-#include "util/u_simple_shaders.h"

-

-#include "cso_cache/cso_context.h"

-

-

-struct blit_state

-{

-   struct pipe_context *pipe;

-   struct cso_context *cso;

-

-   struct pipe_blend_state blend;

-   struct pipe_depth_stencil_alpha_state depthstencil_keep;

-   struct pipe_depth_stencil_alpha_state depthstencil_write;

-   struct pipe_rasterizer_state rasterizer;

-   struct pipe_sampler_state sampler;

-   struct pipe_viewport_state viewport;

-   struct pipe_clip_state clip;

-   struct pipe_vertex_element velem[2];

-   enum pipe_texture_target internal_target;

-

-   void *vs;

-   void *fs[TGSI_WRITEMASK_XYZW + 1];

-   void *fs_depth;

-

-   struct pipe_resource *vbuf;  /**< quad vertices */

-   unsigned vbuf_slot;

-

-   float vertices[4][2][4];   /**< vertex/texcoords for quad */

-};

-

-

-/**

- * Create state object for blit.

- * Intended to be created once and re-used for many blit() calls.

- */

-struct blit_state *

-util_create_blit(struct pipe_context *pipe, struct cso_context *cso)

-{

-   struct blit_state *ctx;

-   uint i;

-

-   ctx = CALLOC_STRUCT(blit_state);

-   if (!ctx)

-      return NULL;

-

-   ctx->pipe = pipe;

-   ctx->cso = cso;

-

-   /* disabled blending/masking */

-   memset(&ctx->blend, 0, sizeof(ctx->blend));

-   ctx->blend.rt[0].colormask = PIPE_MASK_RGBA;

-

-   /* no-op depth/stencil/alpha */

-   memset(&ctx->depthstencil_keep, 0, sizeof(ctx->depthstencil_keep));

-   memset(&ctx->depthstencil_write, 0, sizeof(ctx->depthstencil_write));

-   ctx->depthstencil_write.depth.enabled = 1;

-   ctx->depthstencil_write.depth.writemask = 1;

-   ctx->depthstencil_write.depth.func = PIPE_FUNC_ALWAYS;

-

-   /* rasterizer */

-   memset(&ctx->rasterizer, 0, sizeof(ctx->rasterizer));

-   ctx->rasterizer.cull_face = PIPE_FACE_NONE;

-   ctx->rasterizer.gl_rasterization_rules = 1;

-

-   /* samplers */

-   memset(&ctx->sampler, 0, sizeof(ctx->sampler));

-   ctx->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;

-   ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;

-   ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;

-   ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;

-   ctx->sampler.min_img_filter = 0; /* set later */

-   ctx->sampler.mag_img_filter = 0; /* set later */

-

-   /* vertex elements state */

-   memset(&ctx->velem[0], 0, sizeof(ctx->velem[0]) * 2);

-   for (i = 0; i < 2; i++) {

-      ctx->velem[i].src_offset = i * 4 * sizeof(float);

-      ctx->velem[i].instance_divisor = 0;

-      ctx->velem[i].vertex_buffer_index = 0;

-      ctx->velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;

-   }

-

-   ctx->vbuf = NULL;

-

-   /* init vertex data that doesn't change */

-   for (i = 0; i < 4; i++) {

-      ctx->vertices[i][0][3] = 1.0f; /* w */

-      ctx->vertices[i][1][2] = 0.0f; /* r */

-      ctx->vertices[i][1][3] = 1.0f; /* q */

-   }

-

-   if(pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))

-      ctx->internal_target = PIPE_TEXTURE_2D;

-   else

-      ctx->internal_target = PIPE_TEXTURE_RECT;

-

-   return ctx;

-}

-

-

-/**

- * Destroy a blit context

- */

-void

-util_destroy_blit(struct blit_state *ctx)

-{

-   struct pipe_context *pipe = ctx->pipe;

-   unsigned i;

-

-   if (ctx->vs)

-      pipe->delete_vs_state(pipe, ctx->vs);

-

-   for (i = 0; i < Elements(ctx->fs); i++)

-      if (ctx->fs[i])

-         pipe->delete_fs_state(pipe, ctx->fs[i]);

-

-   if (ctx->fs_depth)

-      pipe->delete_fs_state(pipe, ctx->fs_depth);

-

-   pipe_resource_reference(&ctx->vbuf, NULL);

-

-   FREE(ctx);

-}

-

-

-/**

- * Helper function to set the fragment shaders.

- */

-static INLINE void

-set_fragment_shader(struct blit_state *ctx, uint writemask)

-{

-   if (!ctx->fs[writemask])

-      ctx->fs[writemask] =

-         util_make_fragment_tex_shader_writemask(ctx->pipe, TGSI_TEXTURE_2D,

-                                                 TGSI_INTERPOLATE_LINEAR,

-                                                 writemask);

-

-   cso_set_fragment_shader_handle(ctx->cso, ctx->fs[writemask]);

-}

-

-

-/**

- * Helper function to set the depthwrite shader.

- */

-static INLINE void

-set_depth_fragment_shader(struct blit_state *ctx)

-{

-   if (!ctx->fs_depth)

-      ctx->fs_depth =

-         util_make_fragment_tex_shader_writedepth(ctx->pipe, TGSI_TEXTURE_2D,

-                                                  TGSI_INTERPOLATE_LINEAR);

-

-   cso_set_fragment_shader_handle(ctx->cso, ctx->fs_depth);

-}

-

-

-/**

- * Helper function to set the vertex shader.

- */

-static INLINE void

-set_vertex_shader(struct blit_state *ctx)

-{

-   /* vertex shader - still required to provide the linkage between

-    * fragment shader input semantics and vertex_element/buffers.

-    */

-   if (!ctx->vs) {

-      const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,

-                                      TGSI_SEMANTIC_GENERIC };

-      const uint semantic_indexes[] = { 0, 0 };

-      ctx->vs = util_make_vertex_passthrough_shader(ctx->pipe, 2,

-                                                    semantic_names,

-                                                    semantic_indexes);

-   }

-

-   cso_set_vertex_shader_handle(ctx->cso, ctx->vs);

-}

-

-

-/**

- * Get offset of next free slot in vertex buffer for quad vertices.

- */

-static unsigned

-get_next_slot( struct blit_state *ctx )

-{

-   const unsigned max_slots = 4096 / sizeof ctx->vertices;

-

-   if (ctx->vbuf_slot >= max_slots) 

-      util_blit_flush( ctx );

-

-   if (!ctx->vbuf) {

-      ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,

-                                     PIPE_BIND_VERTEX_BUFFER,

-                                     PIPE_USAGE_STREAM,

-                                     max_slots * sizeof ctx->vertices);

-   }

-   

-   return ctx->vbuf_slot++ * sizeof ctx->vertices;

-}

-

-

-

-

-/**

- * Setup vertex data for the textured quad we'll draw.

- * Note: y=0=top

- */

-static unsigned

-setup_vertex_data_tex(struct blit_state *ctx,

-                      float x0, float y0, float x1, float y1,

-                      float s0, float t0, float s1, float t1,

-                      float z)

-{

-   unsigned offset;

-

-   ctx->vertices[0][0][0] = x0;

-   ctx->vertices[0][0][1] = y0;

-   ctx->vertices[0][0][2] = z;

-   ctx->vertices[0][1][0] = s0; /*s*/

-   ctx->vertices[0][1][1] = t0; /*t*/

-

-   ctx->vertices[1][0][0] = x1;

-   ctx->vertices[1][0][1] = y0;

-   ctx->vertices[1][0][2] = z;

-   ctx->vertices[1][1][0] = s1; /*s*/

-   ctx->vertices[1][1][1] = t0; /*t*/

-

-   ctx->vertices[2][0][0] = x1;

-   ctx->vertices[2][0][1] = y1;

-   ctx->vertices[2][0][2] = z;

-   ctx->vertices[2][1][0] = s1;

-   ctx->vertices[2][1][1] = t1;

-

-   ctx->vertices[3][0][0] = x0;

-   ctx->vertices[3][0][1] = y1;

-   ctx->vertices[3][0][2] = z;

-   ctx->vertices[3][1][0] = s0;

-   ctx->vertices[3][1][1] = t1;

-

-   offset = get_next_slot( ctx );

-

-   pipe_buffer_write_nooverlap(ctx->pipe, ctx->vbuf,

-                               offset, sizeof(ctx->vertices), ctx->vertices);

-

-   return offset;

-}

-

-

-/**

- * \return TRUE if two regions overlap, FALSE otherwise

- */

-static boolean

-regions_overlap(int srcX0, int srcY0,

-                int srcX1, int srcY1,

-                int dstX0, int dstY0,

-                int dstX1, int dstY1)

-{

-   if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))

-      return FALSE; /* src completely left of dst */

-

-   if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))

-      return FALSE; /* dst completely left of src */

-

-   if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))

-      return FALSE; /* src completely above dst */

-

-   if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))

-      return FALSE; /* dst completely above src */

-

-   return TRUE; /* some overlap */

-}

-

-

-/**

- * Copy pixel block from src surface to dst surface.

- * Overlapping regions are acceptable.

- * Flipping and stretching are supported.

- * \param filter  one of PIPE_TEX_MIPFILTER_NEAREST/LINEAR

- * \param writemask  controls which channels in the dest surface are sourced

- *                   from the src surface.  Disabled channels are sourced

- *                   from (0,0,0,1).

- * XXX need some control over blitting stencil.

- */

-void

-util_blit_pixels_writemask(struct blit_state *ctx,

-                           struct pipe_resource *src_tex,

-                           unsigned src_level,

-                           int srcX0, int srcY0,

-                           int srcX1, int srcY1,

-                           int srcZ0,

-                           struct pipe_surface *dst,

-                           int dstX0, int dstY0,

-                           int dstX1, int dstY1,

-                           float z, uint filter,

-                           uint writemask)

-{

-   struct pipe_context *pipe = ctx->pipe;

-   struct pipe_screen *screen = pipe->screen;

-   enum pipe_format src_format, dst_format;

-   struct pipe_sampler_view *sampler_view = NULL;

-   struct pipe_sampler_view sv_templ;

-   struct pipe_surface *dst_surface;

-   struct pipe_framebuffer_state fb;

-   const int srcW = abs(srcX1 - srcX0);

-   const int srcH = abs(srcY1 - srcY0);

-   unsigned offset;

-   boolean overlap, dst_is_depth;

-   float s0, t0, s1, t1;

-   boolean normalized;

-

-   assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||

-          filter == PIPE_TEX_MIPFILTER_LINEAR);

-

-   assert(src_level <= src_tex->last_level);

-

-   /* do the regions overlap? */

-   overlap = src_tex == dst->texture &&

-             dst->u.tex.level == src_level &&

-             dst->u.tex.first_layer == srcZ0 &&

-      regions_overlap(srcX0, srcY0, srcX1, srcY1,

-                      dstX0, dstY0, dstX1, dstY1);

-

-   src_format = util_format_linear(src_tex->format);

-   dst_format = util_format_linear(dst->format);

-

-   /*

-    * Check for simple case:  no format conversion, no flipping, no stretching,

-    * no overlapping.

-    * Filter mode should not matter since there's no stretching.

-    */

-   if (dst_format == src_format &&

-       srcX0 < srcX1 &&

-       dstX0 < dstX1 &&

-       srcY0 < srcY1 &&

-       dstY0 < dstY1 &&

-       (dstX1 - dstX0) == (srcX1 - srcX0) &&

-       (dstY1 - dstY0) == (srcY1 - srcY0) &&

-       !overlap) {

-      struct pipe_box src_box;

-      src_box.x = srcX0;

-      src_box.y = srcY0;

-      src_box.z = srcZ0;

-      src_box.width = srcW;

-      src_box.height = srcH;

-      src_box.depth = 1;

-      pipe->resource_copy_region(pipe,

-                                 dst->texture, dst->u.tex.level,

-                                 dstX0, dstY0, dst->u.tex.first_layer,/* dest */

-                                 src_tex, src_level,

-                                 &src_box);

-       return;

-   }

-

-   if (dst_format == dst->format) {

-      dst_surface = dst;

-   } else {

-      struct pipe_surface templ = *dst;

-      templ.format = dst_format;

-      dst_surface = pipe->create_surface(pipe, dst->texture, &templ);

-   }

-

-   /* Create a temporary texture when src and dest alias or when src

-    * is anything other than a 2d texture.

-    * XXX should just use appropriate shader to access 1d / 3d slice / cube face,

-    * much like the u_blitter code does (should be pretty trivial).

-    * 

-    * This can still be improved upon.

-    */

-   if ((src_tex == dst_surface->texture &&

-       dst_surface->u.tex.level == src_level &&

-       dst_surface->u.tex.first_layer == srcZ0) ||

-       (src_tex->target != PIPE_TEXTURE_2D &&

-       src_tex->target != PIPE_TEXTURE_2D &&

-       src_tex->target != PIPE_TEXTURE_RECT))

-   {

-      struct pipe_resource texTemp;

-      struct pipe_resource *tex;

-      struct pipe_sampler_view sv_templ;

-      struct pipe_box src_box;

-      const int srcLeft = MIN2(srcX0, srcX1);

-      const int srcTop = MIN2(srcY0, srcY1);

-

-      if (srcLeft != srcX0) {

-         /* left-right flip */

-         int tmp = dstX0;

-         dstX0 = dstX1;

-         dstX1 = tmp;

-      }

-

-      if (srcTop != srcY0) {

-         /* up-down flip */

-         int tmp = dstY0;

-         dstY0 = dstY1;

-         dstY1 = tmp;

-      }

-

-      /* create temp texture */

-      memset(&texTemp, 0, sizeof(texTemp));

-      texTemp.target = ctx->internal_target;

-      texTemp.format = src_format;

-      texTemp.last_level = 0;

-      texTemp.width0 = srcW;

-      texTemp.height0 = srcH;

-      texTemp.depth0 = 1;

-      texTemp.array_size = 1;

-      texTemp.bind = PIPE_BIND_SAMPLER_VIEW;

-

-      tex = screen->resource_create(screen, &texTemp);

-      if (!tex)

-         return;

-

-      src_box.x = srcLeft;

-      src_box.y = srcTop;

-      src_box.z = srcZ0;

-      src_box.width = srcW;

-      src_box.height = srcH;

-      src_box.depth = 1;

-      /* load temp texture */

-      pipe->resource_copy_region(pipe,

-                                 tex, 0, 0, 0, 0,  /* dest */

-                                 src_tex, src_level, &src_box);

-

-      normalized = tex->target != PIPE_TEXTURE_RECT;

-      if(normalized) {

-         s0 = 0.0f;

-         s1 = 1.0f;

-         t0 = 0.0f;

-         t1 = 1.0f;

-      }

-      else {

-         s0 = 0;

-         s1 = srcW;

-         t0 = 0;

-         t1 = srcH;

-      }

-

-      u_sampler_view_default_template(&sv_templ, tex, tex->format);

-      sampler_view = pipe->create_sampler_view(pipe, tex, &sv_templ);

-

-      if (!sampler_view) {

-         pipe_resource_reference(&tex, NULL);

-         return;

-      }

-      pipe_resource_reference(&tex, NULL);

-   }

-   else {

-      u_sampler_view_default_template(&sv_templ, src_tex, src_format);

-      sampler_view = pipe->create_sampler_view(pipe, src_tex, &sv_templ);

-

-      if (!sampler_view) {

-         return;

-      }

-

-      s0 = srcX0;

-      s1 = srcX1;

-      t0 = srcY0;

-      t1 = srcY1;

-      normalized = sampler_view->texture->target != PIPE_TEXTURE_RECT;

-      if(normalized)

-      {

-         s0 /= (float)(u_minify(sampler_view->texture->width0, src_level));

-         s1 /= (float)(u_minify(sampler_view->texture->width0, src_level));

-         t0 /= (float)(u_minify(sampler_view->texture->height0, src_level));

-         t1 /= (float)(u_minify(sampler_view->texture->height0, src_level));

-      }

-   }

-

-   dst_is_depth = util_format_is_depth_or_stencil(dst_format);

-

-   assert(screen->is_format_supported(screen, sampler_view->format, ctx->internal_target,

-                                      sampler_view->texture->nr_samples,

-                                      PIPE_BIND_SAMPLER_VIEW));

-   assert(screen->is_format_supported(screen, dst_format, ctx->internal_target,

-                                      dst_surface->texture->nr_samples,

-                                      dst_is_depth ? PIPE_BIND_DEPTH_STENCIL :

-                                                     PIPE_BIND_RENDER_TARGET));

-   /* save state (restored below) */

-   cso_save_blend(ctx->cso);

-   cso_save_depth_stencil_alpha(ctx->cso);

-   cso_save_rasterizer(ctx->cso);

-   cso_save_samplers(ctx->cso);

-   cso_save_fragment_sampler_views(ctx->cso);

-   cso_save_viewport(ctx->cso);

-   cso_save_framebuffer(ctx->cso);

-   cso_save_fragment_shader(ctx->cso);

-   cso_save_vertex_shader(ctx->cso);

-   cso_save_clip(ctx->cso);

-   cso_save_vertex_elements(ctx->cso);

-   cso_save_vertex_buffers(ctx->cso);

-

-   /* set misc state we care about */

-   cso_set_blend(ctx->cso, &ctx->blend);

-   cso_set_depth_stencil_alpha(ctx->cso,

-                               dst_is_depth ? &ctx->depthstencil_write :

-                                              &ctx->depthstencil_keep);

-   cso_set_rasterizer(ctx->cso, &ctx->rasterizer);

-   cso_set_clip(ctx->cso, &ctx->clip);

-   cso_set_vertex_elements(ctx->cso, 2, ctx->velem);

-

-   /* sampler */

-   ctx->sampler.normalized_coords = normalized;

-   ctx->sampler.min_img_filter = filter;

-   ctx->sampler.mag_img_filter = filter;

-   ctx->sampler.min_lod = src_level;

-   ctx->sampler.max_lod = src_level;

-   cso_single_sampler(ctx->cso, 0, &ctx->sampler);

-   cso_single_sampler_done(ctx->cso);

-

-   /* viewport */

-   ctx->viewport.scale[0] = 0.5f * dst_surface->width;

-   ctx->viewport.scale[1] = 0.5f * dst_surface->height;

-   ctx->viewport.scale[2] = 0.5f;

-   ctx->viewport.scale[3] = 1.0f;

-   ctx->viewport.translate[0] = 0.5f * dst_surface->width;

-   ctx->viewport.translate[1] = 0.5f * dst_surface->height;

-   ctx->viewport.translate[2] = 0.5f;

-   ctx->viewport.translate[3] = 0.0f;

-   cso_set_viewport(ctx->cso, &ctx->viewport);

-

-   /* texture */

-   cso_set_fragment_sampler_views(ctx->cso, 1, &sampler_view);

-

-   /* shaders */

-   if (dst_is_depth) {

-      set_depth_fragment_shader(ctx);

-   } else {

-      set_fragment_shader(ctx, writemask);

-   }

-   set_vertex_shader(ctx);

-

-   /* drawing dest */

-   memset(&fb, 0, sizeof(fb));

-   fb.width = dst_surface->width;

-   fb.height = dst_surface->height;

-   if (dst_is_depth) {

-      fb.zsbuf = dst_surface;

-   } else {

-      fb.nr_cbufs = 1;

-      fb.cbufs[0] = dst_surface;

-   }

-   cso_set_framebuffer(ctx->cso, &fb);

-

-   /* draw quad */

-   offset = setup_vertex_data_tex(ctx,

-                                  (float) dstX0 / dst_surface->width * 2.0f - 1.0f,

-                                  (float) dstY0 / dst_surface->height * 2.0f - 1.0f,

-                                  (float) dstX1 / dst_surface->width * 2.0f - 1.0f,

-                                  (float) dstY1 / dst_surface->height * 2.0f - 1.0f,

-                                  s0, t0,

-                                  s1, t1,

-                                  z);

-

-   util_draw_vertex_buffer(ctx->pipe, ctx->cso, ctx->vbuf, offset,

-                           PIPE_PRIM_TRIANGLE_FAN,

-                           4,  /* verts */

-                           2); /* attribs/vert */

-

-   /* restore state we changed */

-   cso_restore_blend(ctx->cso);

-   cso_restore_depth_stencil_alpha(ctx->cso);

-   cso_restore_rasterizer(ctx->cso);

-   cso_restore_samplers(ctx->cso);

-   cso_restore_fragment_sampler_views(ctx->cso);

-   cso_restore_viewport(ctx->cso);

-   cso_restore_framebuffer(ctx->cso);

-   cso_restore_fragment_shader(ctx->cso);

-   cso_restore_vertex_shader(ctx->cso);

-   cso_restore_clip(ctx->cso);

-   cso_restore_vertex_elements(ctx->cso);

-   cso_restore_vertex_buffers(ctx->cso);

-

-   pipe_sampler_view_reference(&sampler_view, NULL);

-   if (dst_surface != dst)

-      pipe_surface_reference(&dst_surface, NULL);

-}

-

-

-void

-util_blit_pixels(struct blit_state *ctx,

-                 struct pipe_resource *src_tex,

-                 unsigned src_level,

-                 int srcX0, int srcY0,

-                 int srcX1, int srcY1,

-                 int srcZ,

-                 struct pipe_surface *dst,

-                 int dstX0, int dstY0,

-                 int dstX1, int dstY1,

-                 float z, uint filter )

-{

-   util_blit_pixels_writemask( ctx, src_tex,

-                               src_level,

-                               srcX0, srcY0,

-                               srcX1, srcY1,

-                               srcZ,

-                               dst,

-                               dstX0, dstY0,

-                               dstX1, dstY1,

-                               z, filter,

-                               TGSI_WRITEMASK_XYZW );

-}

-

-

-/* Release vertex buffer at end of frame to avoid synchronous

- * rendering.

- */

-void util_blit_flush( struct blit_state *ctx )

-{

-   pipe_resource_reference(&ctx->vbuf, NULL);

-   ctx->vbuf_slot = 0;

-} 

-

-

-

-/**

- * Copy pixel block from src texture to dst surface.

- *

- * XXX Should support selection of level.

- * XXX need some control over blitting Z and/or stencil.

- */

-void

-util_blit_pixels_tex(struct blit_state *ctx,

-                     struct pipe_sampler_view *src_sampler_view,

-                     int srcX0, int srcY0,

-                     int srcX1, int srcY1,

-                     struct pipe_surface *dst,

-                     int dstX0, int dstY0,

-                     int dstX1, int dstY1,

-                     float z, uint filter)

-{

-   boolean normalized = src_sampler_view->texture->target != PIPE_TEXTURE_RECT;

-   struct pipe_framebuffer_state fb;

-   float s0, t0, s1, t1;

-   unsigned offset;

-   struct pipe_resource *tex = src_sampler_view->texture;

-

-   assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||

-          filter == PIPE_TEX_MIPFILTER_LINEAR);

-

-   assert(tex);

-   assert(tex->width0 != 0);

-   assert(tex->height0 != 0);

-

-   s0 = srcX0;

-   s1 = srcX1;

-   t0 = srcY0;

-   t1 = srcY1;

-

-   if(normalized)

-   {

-      s0 /= (float)tex->width0;

-      s1 /= (float)tex->width0;

-      t0 /= (float)tex->height0;

-      t1 /= (float)tex->height0;

-   }

-

-   assert(ctx->pipe->screen->is_format_supported(ctx->pipe->screen, dst->format,

-                                                 PIPE_TEXTURE_2D,

-                                                 dst->texture->nr_samples,

-                                                 PIPE_BIND_RENDER_TARGET));

-

-   /* save state (restored below) */

-   cso_save_blend(ctx->cso);

-   cso_save_depth_stencil_alpha(ctx->cso);

-   cso_save_rasterizer(ctx->cso);

-   cso_save_samplers(ctx->cso);

-   cso_save_fragment_sampler_views(ctx->cso);

-   cso_save_viewport(ctx->cso);

-   cso_save_framebuffer(ctx->cso);

-   cso_save_fragment_shader(ctx->cso);

-   cso_save_vertex_shader(ctx->cso);

-   cso_save_clip(ctx->cso);

-   cso_save_vertex_elements(ctx->cso);

-   cso_save_vertex_buffers(ctx->cso);

-

-   /* set misc state we care about */

-   cso_set_blend(ctx->cso, &ctx->blend);

-   cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil_keep);

-   cso_set_rasterizer(ctx->cso, &ctx->rasterizer);

-   cso_set_clip(ctx->cso, &ctx->clip);

-   cso_set_vertex_elements(ctx->cso, 2, ctx->velem);

-

-   /* sampler */

-   ctx->sampler.normalized_coords = normalized;

-   ctx->sampler.min_img_filter = filter;

-   ctx->sampler.mag_img_filter = filter;

-   cso_single_sampler(ctx->cso, 0, &ctx->sampler);

-   cso_single_sampler_done(ctx->cso);

-

-   /* viewport */

-   ctx->viewport.scale[0] = 0.5f * dst->width;

-   ctx->viewport.scale[1] = 0.5f * dst->height;

-   ctx->viewport.scale[2] = 0.5f;

-   ctx->viewport.scale[3] = 1.0f;

-   ctx->viewport.translate[0] = 0.5f * dst->width;

-   ctx->viewport.translate[1] = 0.5f * dst->height;

-   ctx->viewport.translate[2] = 0.5f;

-   ctx->viewport.translate[3] = 0.0f;

-   cso_set_viewport(ctx->cso, &ctx->viewport);

-

-   /* texture */

-   cso_set_fragment_sampler_views(ctx->cso, 1, &src_sampler_view);

-

-   /* shaders */

-   set_fragment_shader(ctx, TGSI_WRITEMASK_XYZW);

-   set_vertex_shader(ctx);

-

-   /* drawing dest */

-   memset(&fb, 0, sizeof(fb));

-   fb.width = dst->width;

-   fb.height = dst->height;

-   fb.nr_cbufs = 1;

-   fb.cbufs[0] = dst;

-   cso_set_framebuffer(ctx->cso, &fb);

-

-   /* draw quad */

-   offset = setup_vertex_data_tex(ctx,

-                                  (float) dstX0 / dst->width * 2.0f - 1.0f,

-                                  (float) dstY0 / dst->height * 2.0f - 1.0f,

-                                  (float) dstX1 / dst->width * 2.0f - 1.0f,

-                                  (float) dstY1 / dst->height * 2.0f - 1.0f,

-                                  s0, t0, s1, t1,

-                                  z);

-

-   util_draw_vertex_buffer(ctx->pipe, ctx->cso,

-                           ctx->vbuf, offset,

-                           PIPE_PRIM_TRIANGLE_FAN,

-                           4,  /* verts */

-                           2); /* attribs/vert */

-

-   /* restore state we changed */

-   cso_restore_blend(ctx->cso);

-   cso_restore_depth_stencil_alpha(ctx->cso);

-   cso_restore_rasterizer(ctx->cso);

-   cso_restore_samplers(ctx->cso);

-   cso_restore_fragment_sampler_views(ctx->cso);

-   cso_restore_viewport(ctx->cso);

-   cso_restore_framebuffer(ctx->cso);

-   cso_restore_fragment_shader(ctx->cso);

-   cso_restore_vertex_shader(ctx->cso);

-   cso_restore_clip(ctx->cso);

-   cso_restore_vertex_elements(ctx->cso);

-   cso_restore_vertex_buffers(ctx->cso);

-}

+/**************************************************************************
+ *
+ * Copyright 2008 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.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * Copy/blit pixel rect between surfaces
+ *  
+ * @author Brian Paul
+ */
+
+
+#include "pipe/p_context.h"
+#include "util/u_debug.h"
+#include "pipe/p_defines.h"
+#include "util/u_inlines.h"
+#include "pipe/p_shader_tokens.h"
+#include "pipe/p_state.h"
+
+#include "util/u_blit.h"
+#include "util/u_draw_quad.h"
+#include "util/u_format.h"
+#include "util/u_math.h"
+#include "util/u_memory.h"
+#include "util/u_sampler.h"
+#include "util/u_simple_shaders.h"
+
+#include "cso_cache/cso_context.h"
+
+
+struct blit_state
+{
+   struct pipe_context *pipe;
+   struct cso_context *cso;
+
+   struct pipe_blend_state blend;
+   struct pipe_depth_stencil_alpha_state depthstencil_keep;
+   struct pipe_depth_stencil_alpha_state depthstencil_write;
+   struct pipe_rasterizer_state rasterizer;
+   struct pipe_sampler_state sampler;
+   struct pipe_viewport_state viewport;
+   struct pipe_clip_state clip;
+   struct pipe_vertex_element velem[2];
+   enum pipe_texture_target internal_target;
+
+   void *vs;
+   void *fs[TGSI_WRITEMASK_XYZW + 1];
+   void *fs_depth;
+
+   struct pipe_resource *vbuf;  /**< quad vertices */
+   unsigned vbuf_slot;
+
+   float vertices[4][2][4];   /**< vertex/texcoords for quad */
+};
+
+
+/**
+ * Create state object for blit.
+ * Intended to be created once and re-used for many blit() calls.
+ */
+struct blit_state *
+util_create_blit(struct pipe_context *pipe, struct cso_context *cso)
+{
+   struct blit_state *ctx;
+   uint i;
+
+   ctx = CALLOC_STRUCT(blit_state);
+   if (!ctx)
+      return NULL;
+
+   ctx->pipe = pipe;
+   ctx->cso = cso;
+
+   /* disabled blending/masking */
+   memset(&ctx->blend, 0, sizeof(ctx->blend));
+   ctx->blend.rt[0].colormask = PIPE_MASK_RGBA;
+
+   /* no-op depth/stencil/alpha */
+   memset(&ctx->depthstencil_keep, 0, sizeof(ctx->depthstencil_keep));
+   memset(&ctx->depthstencil_write, 0, sizeof(ctx->depthstencil_write));
+   ctx->depthstencil_write.depth.enabled = 1;
+   ctx->depthstencil_write.depth.writemask = 1;
+   ctx->depthstencil_write.depth.func = PIPE_FUNC_ALWAYS;
+
+   /* rasterizer */
+   memset(&ctx->rasterizer, 0, sizeof(ctx->rasterizer));
+   ctx->rasterizer.cull_face = PIPE_FACE_NONE;
+   ctx->rasterizer.gl_rasterization_rules = 1;
+
+   /* samplers */
+   memset(&ctx->sampler, 0, sizeof(ctx->sampler));
+   ctx->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+   ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+   ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+   ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
+   ctx->sampler.min_img_filter = 0; /* set later */
+   ctx->sampler.mag_img_filter = 0; /* set later */
+
+   /* vertex elements state */
+   memset(&ctx->velem[0], 0, sizeof(ctx->velem[0]) * 2);
+   for (i = 0; i < 2; i++) {
+      ctx->velem[i].src_offset = i * 4 * sizeof(float);
+      ctx->velem[i].instance_divisor = 0;
+      ctx->velem[i].vertex_buffer_index = 0;
+      ctx->velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+   }
+
+   ctx->vbuf = NULL;
+
+   /* init vertex data that doesn't change */
+   for (i = 0; i < 4; i++) {
+      ctx->vertices[i][0][3] = 1.0f; /* w */
+      ctx->vertices[i][1][2] = 0.0f; /* r */
+      ctx->vertices[i][1][3] = 1.0f; /* q */
+   }
+
+   if(pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
+      ctx->internal_target = PIPE_TEXTURE_2D;
+   else
+      ctx->internal_target = PIPE_TEXTURE_RECT;
+
+   return ctx;
+}
+
+
+/**
+ * Destroy a blit context
+ */
+void
+util_destroy_blit(struct blit_state *ctx)
+{
+   struct pipe_context *pipe = ctx->pipe;
+   unsigned i;
+
+   if (ctx->vs)
+      pipe->delete_vs_state(pipe, ctx->vs);
+
+   for (i = 0; i < Elements(ctx->fs); i++)
+      if (ctx->fs[i])
+         pipe->delete_fs_state(pipe, ctx->fs[i]);
+
+   if (ctx->fs_depth)
+      pipe->delete_fs_state(pipe, ctx->fs_depth);
+
+   pipe_resource_reference(&ctx->vbuf, NULL);
+
+   FREE(ctx);
+}
+
+
+/**
+ * Helper function to set the fragment shaders.
+ */
+static INLINE void
+set_fragment_shader(struct blit_state *ctx, uint writemask)
+{
+   if (!ctx->fs[writemask])
+      ctx->fs[writemask] =
+         util_make_fragment_tex_shader_writemask(ctx->pipe, TGSI_TEXTURE_2D,
+                                                 TGSI_INTERPOLATE_LINEAR,
+                                                 writemask);
+
+   cso_set_fragment_shader_handle(ctx->cso, ctx->fs[writemask]);
+}
+
+
+/**
+ * Helper function to set the depthwrite shader.
+ */
+static INLINE void
+set_depth_fragment_shader(struct blit_state *ctx)
+{
+   if (!ctx->fs_depth)
+      ctx->fs_depth =
+         util_make_fragment_tex_shader_writedepth(ctx->pipe, TGSI_TEXTURE_2D,
+                                                  TGSI_INTERPOLATE_LINEAR);
+
+   cso_set_fragment_shader_handle(ctx->cso, ctx->fs_depth);
+}
+
+
+/**
+ * Helper function to set the vertex shader.
+ */
+static INLINE void
+set_vertex_shader(struct blit_state *ctx)
+{
+   /* vertex shader - still required to provide the linkage between
+    * fragment shader input semantics and vertex_element/buffers.
+    */
+   if (!ctx->vs) {
+      const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
+                                      TGSI_SEMANTIC_GENERIC };
+      const uint semantic_indexes[] = { 0, 0 };
+      ctx->vs = util_make_vertex_passthrough_shader(ctx->pipe, 2,
+                                                    semantic_names,
+                                                    semantic_indexes);
+   }
+
+   cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
+}
+
+
+/**
+ * Get offset of next free slot in vertex buffer for quad vertices.
+ */
+static unsigned
+get_next_slot( struct blit_state *ctx )
+{
+   const unsigned max_slots = 4096 / sizeof ctx->vertices;
+
+   if (ctx->vbuf_slot >= max_slots) 
+      util_blit_flush( ctx );
+
+   if (!ctx->vbuf) {
+      ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
+                                     PIPE_BIND_VERTEX_BUFFER,
+                                     PIPE_USAGE_STREAM,
+                                     max_slots * sizeof ctx->vertices);
+   }
+   
+   return ctx->vbuf_slot++ * sizeof ctx->vertices;
+}
+
+
+
+
+/**
+ * Setup vertex data for the textured quad we'll draw.
+ * Note: y=0=top
+ */
+static unsigned
+setup_vertex_data_tex(struct blit_state *ctx,
+                      float x0, float y0, float x1, float y1,
+                      float s0, float t0, float s1, float t1,
+                      float z)
+{
+   unsigned offset;
+
+   ctx->vertices[0][0][0] = x0;
+   ctx->vertices[0][0][1] = y0;
+   ctx->vertices[0][0][2] = z;
+   ctx->vertices[0][1][0] = s0; /*s*/
+   ctx->vertices[0][1][1] = t0; /*t*/
+
+   ctx->vertices[1][0][0] = x1;
+   ctx->vertices[1][0][1] = y0;
+   ctx->vertices[1][0][2] = z;
+   ctx->vertices[1][1][0] = s1; /*s*/
+   ctx->vertices[1][1][1] = t0; /*t*/
+
+   ctx->vertices[2][0][0] = x1;
+   ctx->vertices[2][0][1] = y1;
+   ctx->vertices[2][0][2] = z;
+   ctx->vertices[2][1][0] = s1;
+   ctx->vertices[2][1][1] = t1;
+
+   ctx->vertices[3][0][0] = x0;
+   ctx->vertices[3][0][1] = y1;
+   ctx->vertices[3][0][2] = z;
+   ctx->vertices[3][1][0] = s0;
+   ctx->vertices[3][1][1] = t1;
+
+   offset = get_next_slot( ctx );
+
+   pipe_buffer_write_nooverlap(ctx->pipe, ctx->vbuf,
+                               offset, sizeof(ctx->vertices), ctx->vertices);
+
+   return offset;
+}
+
+
+/**
+ * \return TRUE if two regions overlap, FALSE otherwise
+ */
+static boolean
+regions_overlap(int srcX0, int srcY0,
+                int srcX1, int srcY1,
+                int dstX0, int dstY0,
+                int dstX1, int dstY1)
+{
+   if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))
+      return FALSE; /* src completely left of dst */
+
+   if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
+      return FALSE; /* dst completely left of src */
+
+   if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
+      return FALSE; /* src completely above dst */
+
+   if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
+      return FALSE; /* dst completely above src */
+
+   return TRUE; /* some overlap */
+}
+
+
+/**
+ * Copy pixel block from src surface to dst surface.
+ * Overlapping regions are acceptable.
+ * Flipping and stretching are supported.
+ * \param filter  one of PIPE_TEX_MIPFILTER_NEAREST/LINEAR
+ * \param writemask  controls which channels in the dest surface are sourced
+ *                   from the src surface.  Disabled channels are sourced
+ *                   from (0,0,0,1).
+ * XXX need some control over blitting stencil.
+ */
+void
+util_blit_pixels_writemask(struct blit_state *ctx,
+                           struct pipe_resource *src_tex,
+                           unsigned src_level,
+                           int srcX0, int srcY0,
+                           int srcX1, int srcY1,
+                           int srcZ0,
+                           struct pipe_surface *dst,
+                           int dstX0, int dstY0,
+                           int dstX1, int dstY1,
+                           float z, uint filter,
+                           uint writemask)
+{
+   struct pipe_context *pipe = ctx->pipe;
+   struct pipe_screen *screen = pipe->screen;
+   enum pipe_format src_format, dst_format;
+   struct pipe_sampler_view *sampler_view = NULL;
+   struct pipe_sampler_view sv_templ;
+   struct pipe_surface *dst_surface;
+   struct pipe_framebuffer_state fb;
+   const int srcW = abs(srcX1 - srcX0);
+   const int srcH = abs(srcY1 - srcY0);
+   unsigned offset;
+   boolean overlap, dst_is_depth;
+   float s0, t0, s1, t1;
+   boolean normalized;
+
+   assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
+          filter == PIPE_TEX_MIPFILTER_LINEAR);
+
+   assert(src_level <= src_tex->last_level);
+
+   /* do the regions overlap? */
+   overlap = src_tex == dst->texture &&
+             dst->u.tex.level == src_level &&
+             dst->u.tex.first_layer == srcZ0 &&
+      regions_overlap(srcX0, srcY0, srcX1, srcY1,
+                      dstX0, dstY0, dstX1, dstY1);
+
+   src_format = util_format_linear(src_tex->format);
+   dst_format = util_format_linear(dst->format);
+
+   /*
+    * Check for simple case:  no format conversion, no flipping, no stretching,
+    * no overlapping.
+    * Filter mode should not matter since there's no stretching.
+    */
+   if (dst_format == src_format &&
+       srcX0 < srcX1 &&
+       dstX0 < dstX1 &&
+       srcY0 < srcY1 &&
+       dstY0 < dstY1 &&
+       (dstX1 - dstX0) == (srcX1 - srcX0) &&
+       (dstY1 - dstY0) == (srcY1 - srcY0) &&
+       !overlap) {
+      struct pipe_box src_box;
+      src_box.x = srcX0;
+      src_box.y = srcY0;
+      src_box.z = srcZ0;
+      src_box.width = srcW;
+      src_box.height = srcH;
+      src_box.depth = 1;
+      pipe->resource_copy_region(pipe,
+                                 dst->texture, dst->u.tex.level,
+                                 dstX0, dstY0, dst->u.tex.first_layer,/* dest */
+                                 src_tex, src_level,
+                                 &src_box);
+       return;
+   }
+
+   if (dst_format == dst->format) {
+      dst_surface = dst;
+   } else {
+      struct pipe_surface templ = *dst;
+      templ.format = dst_format;
+      dst_surface = pipe->create_surface(pipe, dst->texture, &templ);
+   }
+
+   /* Create a temporary texture when src and dest alias or when src
+    * is anything other than a 2d texture.
+    * XXX should just use appropriate shader to access 1d / 3d slice / cube face,
+    * much like the u_blitter code does (should be pretty trivial).
+    * 
+    * This can still be improved upon.
+    */
+   if ((src_tex == dst_surface->texture &&
+       dst_surface->u.tex.level == src_level &&
+       dst_surface->u.tex.first_layer == srcZ0) ||
+       (src_tex->target != PIPE_TEXTURE_2D &&
+       src_tex->target != PIPE_TEXTURE_2D &&
+       src_tex->target != PIPE_TEXTURE_RECT))
+   {
+      struct pipe_resource texTemp;
+      struct pipe_resource *tex;
+      struct pipe_sampler_view sv_templ;
+      struct pipe_box src_box;
+      const int srcLeft = MIN2(srcX0, srcX1);
+      const int srcTop = MIN2(srcY0, srcY1);
+
+      if (srcLeft != srcX0) {
+         /* left-right flip */
+         int tmp = dstX0;
+         dstX0 = dstX1;
+         dstX1 = tmp;
+      }
+
+      if (srcTop != srcY0) {
+         /* up-down flip */
+         int tmp = dstY0;
+         dstY0 = dstY1;
+         dstY1 = tmp;
+      }
+
+      /* create temp texture */
+      memset(&texTemp, 0, sizeof(texTemp));
+      texTemp.target = ctx->internal_target;
+      texTemp.format = src_format;
+      texTemp.last_level = 0;
+      texTemp.width0 = srcW;
+      texTemp.height0 = srcH;
+      texTemp.depth0 = 1;
+      texTemp.array_size = 1;
+      texTemp.bind = PIPE_BIND_SAMPLER_VIEW;
+
+      tex = screen->resource_create(screen, &texTemp);
+      if (!tex)
+         return;
+
+      src_box.x = srcLeft;
+      src_box.y = srcTop;
+      src_box.z = srcZ0;
+      src_box.width = srcW;
+      src_box.height = srcH;
+      src_box.depth = 1;
+      /* load temp texture */
+      pipe->resource_copy_region(pipe,
+                                 tex, 0, 0, 0, 0,  /* dest */
+                                 src_tex, src_level, &src_box);
+
+      normalized = tex->target != PIPE_TEXTURE_RECT;
+      if(normalized) {
+         s0 = 0.0f;
+         s1 = 1.0f;
+         t0 = 0.0f;
+         t1 = 1.0f;
+      }
+      else {
+         s0 = 0;
+         s1 = srcW;
+         t0 = 0;
+         t1 = srcH;
+      }
+
+      u_sampler_view_default_template(&sv_templ, tex, tex->format);
+      sampler_view = pipe->create_sampler_view(pipe, tex, &sv_templ);
+
+      if (!sampler_view) {
+         pipe_resource_reference(&tex, NULL);
+         return;
+      }
+      pipe_resource_reference(&tex, NULL);
+   }
+   else {
+      u_sampler_view_default_template(&sv_templ, src_tex, src_format);
+      sampler_view = pipe->create_sampler_view(pipe, src_tex, &sv_templ);
+
+      if (!sampler_view) {
+         return;
+      }
+
+      s0 = srcX0;
+      s1 = srcX1;
+      t0 = srcY0;
+      t1 = srcY1;
+      normalized = sampler_view->texture->target != PIPE_TEXTURE_RECT;
+      if(normalized)
+      {
+         s0 /= (float)(u_minify(sampler_view->texture->width0, src_level));
+         s1 /= (float)(u_minify(sampler_view->texture->width0, src_level));
+         t0 /= (float)(u_minify(sampler_view->texture->height0, src_level));
+         t1 /= (float)(u_minify(sampler_view->texture->height0, src_level));
+      }
+   }
+
+   dst_is_depth = util_format_is_depth_or_stencil(dst_format);
+
+   assert(screen->is_format_supported(screen, sampler_view->format, ctx->internal_target,
+                                      sampler_view->texture->nr_samples,
+                                      PIPE_BIND_SAMPLER_VIEW));
+   assert(screen->is_format_supported(screen, dst_format, ctx->internal_target,
+                                      dst_surface->texture->nr_samples,
+                                      dst_is_depth ? PIPE_BIND_DEPTH_STENCIL :
+                                                     PIPE_BIND_RENDER_TARGET));
+   /* save state (restored below) */
+   cso_save_blend(ctx->cso);
+   cso_save_depth_stencil_alpha(ctx->cso);
+   cso_save_rasterizer(ctx->cso);
+   cso_save_samplers(ctx->cso);
+   cso_save_fragment_sampler_views(ctx->cso);
+   cso_save_viewport(ctx->cso);
+   cso_save_framebuffer(ctx->cso);
+   cso_save_fragment_shader(ctx->cso);
+   cso_save_vertex_shader(ctx->cso);
+   cso_save_clip(ctx->cso);
+   cso_save_vertex_elements(ctx->cso);
+   cso_save_vertex_buffers(ctx->cso);
+
+   /* set misc state we care about */
+   cso_set_blend(ctx->cso, &ctx->blend);
+   cso_set_depth_stencil_alpha(ctx->cso,
+                               dst_is_depth ? &ctx->depthstencil_write :
+                                              &ctx->depthstencil_keep);
+   cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
+   cso_set_clip(ctx->cso, &ctx->clip);
+   cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
+
+   /* sampler */
+   ctx->sampler.normalized_coords = normalized;
+   ctx->sampler.min_img_filter = filter;
+   ctx->sampler.mag_img_filter = filter;
+   ctx->sampler.min_lod = src_level;
+   ctx->sampler.max_lod = src_level;
+   cso_single_sampler(ctx->cso, 0, &ctx->sampler);
+   cso_single_sampler_done(ctx->cso);
+
+   /* viewport */
+   ctx->viewport.scale[0] = 0.5f * dst_surface->width;
+   ctx->viewport.scale[1] = 0.5f * dst_surface->height;
+   ctx->viewport.scale[2] = 0.5f;
+   ctx->viewport.scale[3] = 1.0f;
+   ctx->viewport.translate[0] = 0.5f * dst_surface->width;
+   ctx->viewport.translate[1] = 0.5f * dst_surface->height;
+   ctx->viewport.translate[2] = 0.5f;
+   ctx->viewport.translate[3] = 0.0f;
+   cso_set_viewport(ctx->cso, &ctx->viewport);
+
+   /* texture */
+   cso_set_fragment_sampler_views(ctx->cso, 1, &sampler_view);
+
+   /* shaders */
+   if (dst_is_depth) {
+      set_depth_fragment_shader(ctx);
+   } else {
+      set_fragment_shader(ctx, writemask);
+   }
+   set_vertex_shader(ctx);
+
+   /* drawing dest */
+   memset(&fb, 0, sizeof(fb));
+   fb.width = dst_surface->width;
+   fb.height = dst_surface->height;
+   if (dst_is_depth) {
+      fb.zsbuf = dst_surface;
+   } else {
+      fb.nr_cbufs = 1;
+      fb.cbufs[0] = dst_surface;
+   }
+   cso_set_framebuffer(ctx->cso, &fb);
+
+   /* draw quad */
+   offset = setup_vertex_data_tex(ctx,
+                                  (float) dstX0 / dst_surface->width * 2.0f - 1.0f,
+                                  (float) dstY0 / dst_surface->height * 2.0f - 1.0f,
+                                  (float) dstX1 / dst_surface->width * 2.0f - 1.0f,
+                                  (float) dstY1 / dst_surface->height * 2.0f - 1.0f,
+                                  s0, t0,
+                                  s1, t1,
+                                  z);
+
+   util_draw_vertex_buffer(ctx->pipe, ctx->cso, ctx->vbuf, offset,
+                           PIPE_PRIM_TRIANGLE_FAN,
+                           4,  /* verts */
+                           2); /* attribs/vert */
+
+   /* restore state we changed */
+   cso_restore_blend(ctx->cso);
+   cso_restore_depth_stencil_alpha(ctx->cso);
+   cso_restore_rasterizer(ctx->cso);
+   cso_restore_samplers(ctx->cso);
+   cso_restore_fragment_sampler_views(ctx->cso);
+   cso_restore_viewport(ctx->cso);
+   cso_restore_framebuffer(ctx->cso);
+   cso_restore_fragment_shader(ctx->cso);
+   cso_restore_vertex_shader(ctx->cso);
+   cso_restore_clip(ctx->cso);
+   cso_restore_vertex_elements(ctx->cso);
+   cso_restore_vertex_buffers(ctx->cso);
+
+   pipe_sampler_view_reference(&sampler_view, NULL);
+   if (dst_surface != dst)
+      pipe_surface_reference(&dst_surface, NULL);
+}
+
+
+void
+util_blit_pixels(struct blit_state *ctx,
+                 struct pipe_resource *src_tex,
+                 unsigned src_level,
+                 int srcX0, int srcY0,
+                 int srcX1, int srcY1,
+                 int srcZ,
+                 struct pipe_surface *dst,
+                 int dstX0, int dstY0,
+                 int dstX1, int dstY1,
+                 float z, uint filter )
+{
+   util_blit_pixels_writemask( ctx, src_tex,
+                               src_level,
+                               srcX0, srcY0,
+                               srcX1, srcY1,
+                               srcZ,
+                               dst,
+                               dstX0, dstY0,
+                               dstX1, dstY1,
+                               z, filter,
+                               TGSI_WRITEMASK_XYZW );
+}
+
+
+/* Release vertex buffer at end of frame to avoid synchronous
+ * rendering.
+ */
+void util_blit_flush( struct blit_state *ctx )
+{
+   pipe_resource_reference(&ctx->vbuf, NULL);
+   ctx->vbuf_slot = 0;
+} 
+
+
+
+/**
+ * Copy pixel block from src texture to dst surface.
+ * The sampler view's first_level field indicates the source
+ * mipmap level to use.
+ * XXX need some control over blitting Z and/or stencil.
+ */
+void
+util_blit_pixels_tex(struct blit_state *ctx,
+                     struct pipe_sampler_view *src_sampler_view,
+                     int srcX0, int srcY0,
+                     int srcX1, int srcY1,
+                     struct pipe_surface *dst,
+                     int dstX0, int dstY0,
+                     int dstX1, int dstY1,
+                     float z, uint filter)
+{
+   boolean normalized = src_sampler_view->texture->target != PIPE_TEXTURE_RECT;
+   struct pipe_framebuffer_state fb;
+   float s0, t0, s1, t1;
+   unsigned offset;
+   struct pipe_resource *tex = src_sampler_view->texture;
+
+   assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
+          filter == PIPE_TEX_MIPFILTER_LINEAR);
+
+   assert(tex);
+   assert(tex->width0 != 0);
+   assert(tex->height0 != 0);
+
+   s0 = srcX0;
+   s1 = srcX1;
+   t0 = srcY0;
+   t1 = srcY1;
+
+   if(normalized)
+   {
+      /* normalize according to the mipmap level's size */
+      int level = src_sampler_view->u.tex.first_level;
+      float w = (float) u_minify(tex->width0, level);
+      float h = (float) u_minify(tex->height0, level);
+      s0 /= w;
+      s1 /= w;
+      t0 /= h;
+      t1 /= h;
+   }
+
+   assert(ctx->pipe->screen->is_format_supported(ctx->pipe->screen, dst->format,
+                                                 PIPE_TEXTURE_2D,
+                                                 dst->texture->nr_samples,
+                                                 PIPE_BIND_RENDER_TARGET));
+
+   /* save state (restored below) */
+   cso_save_blend(ctx->cso);
+   cso_save_depth_stencil_alpha(ctx->cso);
+   cso_save_rasterizer(ctx->cso);
+   cso_save_samplers(ctx->cso);
+   cso_save_fragment_sampler_views(ctx->cso);
+   cso_save_viewport(ctx->cso);
+   cso_save_framebuffer(ctx->cso);
+   cso_save_fragment_shader(ctx->cso);
+   cso_save_vertex_shader(ctx->cso);
+   cso_save_clip(ctx->cso);
+   cso_save_vertex_elements(ctx->cso);
+   cso_save_vertex_buffers(ctx->cso);
+
+   /* set misc state we care about */
+   cso_set_blend(ctx->cso, &ctx->blend);
+   cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil_keep);
+   cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
+   cso_set_clip(ctx->cso, &ctx->clip);
+   cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
+
+   /* sampler */
+   ctx->sampler.normalized_coords = normalized;
+   ctx->sampler.min_img_filter = filter;
+   ctx->sampler.mag_img_filter = filter;
+   cso_single_sampler(ctx->cso, 0, &ctx->sampler);
+   cso_single_sampler_done(ctx->cso);
+
+   /* viewport */
+   ctx->viewport.scale[0] = 0.5f * dst->width;
+   ctx->viewport.scale[1] = 0.5f * dst->height;
+   ctx->viewport.scale[2] = 0.5f;
+   ctx->viewport.scale[3] = 1.0f;
+   ctx->viewport.translate[0] = 0.5f * dst->width;
+   ctx->viewport.translate[1] = 0.5f * dst->height;
+   ctx->viewport.translate[2] = 0.5f;
+   ctx->viewport.translate[3] = 0.0f;
+   cso_set_viewport(ctx->cso, &ctx->viewport);
+
+   /* texture */
+   cso_set_fragment_sampler_views(ctx->cso, 1, &src_sampler_view);
+
+   /* shaders */
+   set_fragment_shader(ctx, TGSI_WRITEMASK_XYZW);
+   set_vertex_shader(ctx);
+
+   /* drawing dest */
+   memset(&fb, 0, sizeof(fb));
+   fb.width = dst->width;
+   fb.height = dst->height;
+   fb.nr_cbufs = 1;
+   fb.cbufs[0] = dst;
+   cso_set_framebuffer(ctx->cso, &fb);
+
+   /* draw quad */
+   offset = setup_vertex_data_tex(ctx,
+                                  (float) dstX0 / dst->width * 2.0f - 1.0f,
+                                  (float) dstY0 / dst->height * 2.0f - 1.0f,
+                                  (float) dstX1 / dst->width * 2.0f - 1.0f,
+                                  (float) dstY1 / dst->height * 2.0f - 1.0f,
+                                  s0, t0, s1, t1,
+                                  z);
+
+   util_draw_vertex_buffer(ctx->pipe, ctx->cso,
+                           ctx->vbuf, offset,
+                           PIPE_PRIM_TRIANGLE_FAN,
+                           4,  /* verts */
+                           2); /* attribs/vert */
+
+   /* restore state we changed */
+   cso_restore_blend(ctx->cso);
+   cso_restore_depth_stencil_alpha(ctx->cso);
+   cso_restore_rasterizer(ctx->cso);
+   cso_restore_samplers(ctx->cso);
+   cso_restore_fragment_sampler_views(ctx->cso);
+   cso_restore_viewport(ctx->cso);
+   cso_restore_framebuffer(ctx->cso);
+   cso_restore_fragment_shader(ctx->cso);
+   cso_restore_vertex_shader(ctx->cso);
+   cso_restore_clip(ctx->cso);
+   cso_restore_vertex_elements(ctx->cso);
+   cso_restore_vertex_buffers(ctx->cso);
+}