svn merge ^/branches/released .

1 files changed, 790 insertions, 0 deletions

diff --git a/mesalib/src/gallium/auxiliary/util/u_blit.c b/mesalib/src/gallium/auxiliary/util/u_blit.c
new file mode 100644
index 000000000..e892a4a77
--- /dev/null
+++ b/mesalib/src/gallium/auxiliary/util/u_blit.c
@@ -0,0 +1,790 @@
+/**************************************************************************

+ *

+ * 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);

+}