gallium: Add texture usage flags, special-case allocation of display targets

For many envirionments it's necessary to allocate display targets
in a window-system friendly manner.  Add facilities so that a driver
can tell if a texture is likely to be used to generate a display surface
and if use special allocation paths if necessary.

Hook up softpipe to call into the winsys->surface_alloc_storage()
routine in this case, though we probably want to change that interface
slightly also.

7 files changed, 38 insertions, 17 deletions

diff --git a/src/mesa/state_tracker/st_atom_pixeltransfer.c b/src/mesa/state_tracker/st_atom_pixeltransfer.c
index 0c32d53c4ab..e500ac8684d 100644
--- a/src/mesa/state_tracker/st_atom_pixeltransfer.c
+++ b/src/mesa/state_tracker/st_atom_pixeltransfer.c
@@ -126,7 +126,8 @@ create_color_map_texture(GLcontext *ctx)
 
    /* create texture for color map/table */
    pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, format, 0,
-                          texSize, texSize, 1, 0);
+                          texSize, texSize, 1, 0,
+                          PIPE_TEXTURE_USAGE_SAMPLER);
    return pt;
 }
 
diff --git a/src/mesa/state_tracker/st_cb_bitmap.c b/src/mesa/state_tracker/st_cb_bitmap.c
index 873b765c2c2..f816e591042 100644
--- a/src/mesa/state_tracker/st_cb_bitmap.c
+++ b/src/mesa/state_tracker/st_cb_bitmap.c
@@ -321,7 +321,8 @@ make_bitmap_texture(GLcontext *ctx, GLsizei width, GLsizei height,
     * Create texture to hold bitmap pattern.
     */
    pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, ctx->st->bitmap.tex_format,
-                          0, width, height, 1, 0);
+                          0, width, height, 1, 0,
+                          PIPE_TEXTURE_USAGE_SAMPLER);
    if (!pt) {
       _mesa_unmap_bitmap_pbo(ctx, unpack);
       return NULL;
@@ -539,7 +540,8 @@ reset_cache(struct st_context *st)
    cache->texture = st_texture_create(st, PIPE_TEXTURE_2D,
                                       st->bitmap.tex_format, 0,
                                       BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT,
-                                      1, 0);
+                                      1, 0,
+                                      PIPE_TEXTURE_USAGE_SAMPLER);
 
    /* Map the texture surface.
     * Subsequent glBitmap calls will write into the texture image.
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c
index 9ae53c95f86..8c775ad8864 100644
--- a/src/mesa/state_tracker/st_cb_drawpixels.c
+++ b/src/mesa/state_tracker/st_cb_drawpixels.c
@@ -346,7 +346,8 @@ make_texture(struct st_context *st,
       return NULL;
 
    pt = st_texture_create(st, PIPE_TEXTURE_2D, pipeFormat, 0, width, height,
-			  1, 0);
+			  1, 0,
+                          PIPE_TEXTURE_USAGE_SAMPLER);
    if (!pt) {
       _mesa_unmap_drawpix_pbo(ctx, unpack);
       return NULL;
@@ -994,7 +995,8 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
    }
 
    pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, texFormat, 0,
-                          width, height, 1, 0);
+                          width, height, 1, 0,
+                          PIPE_TEXTURE_USAGE_SAMPLER);
    if (!pt)
       return;
 
diff --git a/src/mesa/state_tracker/st_cb_fbo.c b/src/mesa/state_tracker/st_cb_fbo.c
index b1747141710..21d61e21638 100644
--- a/src/mesa/state_tracker/st_cb_fbo.c
+++ b/src/mesa/state_tracker/st_cb_fbo.c
@@ -90,8 +90,8 @@ st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 {
    struct pipe_context *pipe = ctx->st->pipe;
    struct st_renderbuffer *strb = st_renderbuffer(rb);
-
    struct pipe_texture template, *texture;
+   unsigned surface_usage;
 
    /* Free the old surface (and texture if we hold the last
     * reference):
@@ -117,10 +117,15 @@ st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
    template.height[0] = height;
    template.depth[0] = 1;
    template.last_level = 0;
-   template.usage = (PIPE_BUFFER_USAGE_CPU_WRITE | 
-                     PIPE_BUFFER_USAGE_CPU_READ |
-                     PIPE_BUFFER_USAGE_GPU_WRITE |
-                     PIPE_BUFFER_USAGE_GPU_READ);
+   template.tex_usage = (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
+                         PIPE_TEXTURE_USAGE_RENDER_TARGET);
+
+   /* Probably need dedicated flags for surface usage too: 
+    */
+   surface_usage = (PIPE_BUFFER_USAGE_GPU_READ |
+                    PIPE_BUFFER_USAGE_GPU_WRITE |
+                    PIPE_BUFFER_USAGE_CPU_READ |
+                    PIPE_BUFFER_USAGE_CPU_WRITE);
 
    texture = pipe->screen->texture_create( pipe->screen,
                                            &template );
@@ -137,11 +142,13 @@ st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
        * to tell the driver to go ahead and allocate the buffer, even
        * if HW doesn't support the format.
        */
-      template.usage = (PIPE_BUFFER_USAGE_CPU_READ |
-                        PIPE_BUFFER_USAGE_CPU_WRITE);
+      template.tex_usage = 0;
+      surface_usage = (PIPE_BUFFER_USAGE_CPU_READ |
+                       PIPE_BUFFER_USAGE_CPU_WRITE);
 
       texture = pipe->screen->texture_create( pipe->screen,
                                               &template );
+
    }
 
    if (!texture) 
@@ -150,7 +157,7 @@ st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
    strb->surface = pipe->screen->get_tex_surface( pipe->screen,
                                                   texture,
                                                   0, 0, 0,
-                                                  template.usage );
+                                                  surface_usage );
 
    pipe_texture_reference( &texture, NULL );
 
diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index 4cca3364c15..06caa06e776 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -333,7 +333,9 @@ guess_and_alloc_texture(struct st_context *st,
                                  width,
                                  height,
                                  depth,
-                                 comp_byte);
+                                 comp_byte,
+                                 ( PIPE_TEXTURE_USAGE_RENDER_TARGET |
+                                   PIPE_TEXTURE_USAGE_SAMPLER ));
 
    DBG("%s - success\n", __FUNCTION__);
 }
@@ -1501,7 +1503,11 @@ st_finalize_texture(GLcontext *ctx,
                                     firstImage->base.Width2,
                                     firstImage->base.Height2,
                                     firstImage->base.Depth2,
-                                    comp_byte);
+                                    comp_byte,
+
+                                    ( PIPE_TEXTURE_USAGE_RENDER_TARGET |
+                                      PIPE_TEXTURE_USAGE_SAMPLER ));
+
       if (!stObj->pt) {
          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");
          return GL_FALSE;
diff --git a/src/mesa/state_tracker/st_texture.c b/src/mesa/state_tracker/st_texture.c
index d6268fc80ca..2b3742d4e5b 100644
--- a/src/mesa/state_tracker/st_texture.c
+++ b/src/mesa/state_tracker/st_texture.c
@@ -75,7 +75,8 @@ st_texture_create(struct st_context *st,
 		  GLuint width0,
 		  GLuint height0,
 		  GLuint depth0,
-		  GLuint compress_byte)
+		  GLuint compress_byte,
+                  GLuint usage )
 {
    struct pipe_texture pt, *newtex;
    struct pipe_screen *screen = st->pipe->screen;
@@ -98,6 +99,7 @@ st_texture_create(struct st_context *st,
    pt.depth[0] = depth0;
    pt.compressed = compress_byte ? 1 : 0;
    pt.cpp = pt.compressed ? compress_byte : st_sizeof_format(format);
+   pt.tex_usage = usage;
 
    newtex = screen->texture_create(screen, &pt);
 
diff --git a/src/mesa/state_tracker/st_texture.h b/src/mesa/state_tracker/st_texture.h
index f6d5733e210..6a9f08ec6b7 100644
--- a/src/mesa/state_tracker/st_texture.h
+++ b/src/mesa/state_tracker/st_texture.h
@@ -105,7 +105,8 @@ st_texture_create(struct st_context *st,
                   GLuint width0,
                   GLuint height0,
                   GLuint depth0,
-                  GLuint compress_byte);
+                  GLuint compress_byte,
+                  GLuint tex_usage );
 
 
 /* Check if an image fits into an existing texture object.