+
+static struct pipe_texture *
+create_sampler_texture(struct exa_context *ctx,
+ struct pipe_texture *src)
+{
+ enum pipe_format format;
+ struct pipe_context *pipe = ctx->pipe;
+ struct pipe_screen *screen = pipe->screen;
+ struct pipe_texture *pt;
+ struct pipe_texture templ;
+
+ pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+ /* the coming in texture should already have that invariance */
+ debug_assert(screen->is_format_supported(screen, src->format,
+ PIPE_TEXTURE_2D,
+ PIPE_TEXTURE_USAGE_SAMPLER, 0));
+
+ format = src->format;
+
+ memset(&templ, 0, sizeof(templ));
+ templ.target = PIPE_TEXTURE_2D;
+ templ.format = format;
+ templ.last_level = 0;
+ templ.width[0] = src->width[0];
+ templ.height[0] = src->height[0];
+ templ.depth[0] = 1;
+ pf_get_block(format, &templ.block);
+ templ.tex_usage = PIPE_TEXTURE_USAGE_SAMPLER;
+
+ pt = screen->texture_create(screen, &templ);
+
+ debug_assert(!pt || pipe_is_referenced(&pt->reference));
+
+ if (!pt)
+ return NULL;
+
+ {
+ /* copy source framebuffer surface into texture */
+ struct pipe_surface *ps_read = screen->get_tex_surface(
+ screen, src, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_READ);
+ struct pipe_surface *ps_tex = screen->get_tex_surface(
+ screen, pt, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_WRITE );
+ pipe->surface_copy(pipe,
+ ps_tex, /* dest */
+ 0, 0, /* destx/y */
+ ps_read,
+ 0, 0, src->width[0], src->height[0]);
+ pipe_surface_reference(&ps_read, NULL);
+ pipe_surface_reference(&ps_tex, NULL);
+ }
+
+ return pt;
+}
+