wined3d: Make the surface parameter to blit_shader.set_shader() const.

dlls/wined3d/arb_program_shader.c

@@ -7121,7 +7121,7 @@ static GLuint gen_yuv_shader(struct arbfp_blit_priv *priv, const struct wined3d_
 }
 
 /* Context activation is done by the caller. */
-static HRESULT arbfp_blit_set(void *blit_priv, struct wined3d_context *context, struct wined3d_surface *surface)
+static HRESULT arbfp_blit_set(void *blit_priv, struct wined3d_context *context, const struct wined3d_surface *surface)
 {
     GLenum shader;
     float size[4] = {(float) surface->pow2Width, (float) surface->pow2Height, 1.0f, 1.0f};

dlls/wined3d/surface.c

@@ -6260,7 +6260,7 @@ static void ffp_blit_p8_upload_palette(const struct wined3d_surface *surface, co
 }
 
 /* Context activation is done by the caller. */
-static HRESULT ffp_blit_set(void *blit_priv, struct wined3d_context *context, struct wined3d_surface *surface)
+static HRESULT ffp_blit_set(void *blit_priv, struct wined3d_context *context, const struct wined3d_surface *surface)
 {
     enum complex_fixup fixup = get_complex_fixup(surface->resource.format->color_fixup);
 
@@ -6409,7 +6409,7 @@ static void cpu_blit_free(struct wined3d_device *device)
 }
 
 /* Context activation is done by the caller. */
-static HRESULT cpu_blit_set(void *blit_priv, struct wined3d_context *context, struct wined3d_surface *surface)
+static HRESULT cpu_blit_set(void *blit_priv, struct wined3d_context *context, const struct wined3d_surface *surface)
 {
     return WINED3D_OK;
 }

dlls/wined3d/wined3d_private.h

@@ -1201,7 +1201,7 @@ struct blit_shader
 {
     HRESULT (*alloc_private)(struct wined3d_device *device);
     void (*free_private)(struct wined3d_device *device);
-    HRESULT (*set_shader)(void *blit_priv, struct wined3d_context *context, struct wined3d_surface *surface);
+    HRESULT (*set_shader)(void *blit_priv, struct wined3d_context *context, const struct wined3d_surface *surface);
     void (*unset_shader)(const struct wined3d_gl_info *gl_info);
     BOOL (*blit_supported)(const struct wined3d_gl_info *gl_info, enum wined3d_blit_op blit_op,
             const RECT *src_rect, DWORD src_usage, WINED3DPOOL src_pool, const struct wined3d_format *src_format,