st/vega: Masks and surfaces should share orientation.

The alpha mask is addressed with unnormalized coordinates in the
fragment shader.  It should have the same orientation as the surface
does.

This fixes "mask" OpenVG demo.

diff --git a/src/gallium/state_trackers/vega/mask.c b/src/gallium/state_trackers/vega/mask.c
index ef28ebd..ec3e344 100644 (file)
--- a/src/gallium/state_trackers/vega/mask.c
+++ b/src/gallium/state_trackers/vega/mask.c
@@ -339,12 +339,6 @@ static void setup_mask_fill(const VGfloat color[4])
                                                      VEGA_SOLID_FILL_SHADER));
 }
 
-static void setup_mask_viewport()
-{
-   struct vg_context *ctx = vg_current_context();
-   vg_set_viewport(ctx, VEGA_Y0_TOP);
-}
-
 static void setup_mask_blend()
 {
    struct vg_context *ctx = vg_current_context();
@@ -382,12 +376,10 @@ static void surface_fill(struct pipe_surface *surf,
    cso_save_framebuffer(ctx->cso_context);
    cso_save_blend(ctx->cso_context);
    cso_save_fragment_shader(ctx->cso_context);
-   cso_save_viewport(ctx->cso_context);
 
    setup_mask_blend();
    setup_mask_fill(color);
    setup_mask_framebuffer(surf, surf_width, surf_height);
-   setup_mask_viewport();
 
    renderer_draw_quad(ctx->renderer, x, y,
                       x + width, y + height, 0.0f/*depth should be disabled*/);
@@ -405,7 +397,6 @@ static void surface_fill(struct pipe_surface *surf,
    cso_restore_blend(ctx->cso_context);
    cso_restore_framebuffer(ctx->cso_context);
    cso_restore_fragment_shader(ctx->cso_context);
-   cso_restore_viewport(ctx->cso_context);
 }
 
 
@@ -442,13 +433,11 @@ static void mask_using_texture(struct pipe_sampler_view *sampler_view,
    cso_save_framebuffer(ctx->cso_context);
    cso_save_blend(ctx->cso_context);
    cso_save_fragment_shader(ctx->cso_context);
-   cso_save_viewport(ctx->cso_context);
 
    setup_mask_samplers(sampler_view);
    setup_mask_blend();
    setup_mask_operation(operation);
    setup_mask_framebuffer(surface, surface->width, surface->height);
-   setup_mask_viewport();
 
    /* render the quad to propagate the rendering from stencil */
    renderer_draw_texture(ctx->renderer, texture,
@@ -463,7 +452,6 @@ static void mask_using_texture(struct pipe_sampler_view *sampler_view,
    cso_restore_fragment_shader(ctx->cso_context);
    cso_restore_samplers(ctx->cso_context);
    cso_restore_fragment_sampler_views(ctx->cso_context);
-   cso_restore_viewport(ctx->cso_context);
 
    pipe_surface_reference(&surface, NULL);
 }
@@ -577,12 +565,10 @@ static void mask_layer_render_to(struct vg_mask_layer *layer,
 
    cso_save_framebuffer(ctx->cso_context);
    cso_save_fragment_shader(ctx->cso_context);
-   cso_save_viewport(ctx->cso_context);
 
    setup_mask_blend();
    setup_mask_fill(fill_color);
    setup_mask_framebuffer(surface, layer->width, layer->height);
-   setup_mask_viewport();
 
    if (paint_modes & VG_FILL_PATH) {
       struct matrix *mat = &ctx->state.vg.path_user_to_surface_matrix;
@@ -599,7 +585,6 @@ static void mask_layer_render_to(struct vg_mask_layer *layer,
 
    cso_restore_framebuffer(ctx->cso_context);
    cso_restore_fragment_shader(ctx->cso_context);
-   cso_restore_viewport(ctx->cso_context);
    ctx->state.dirty |= BLEND_DIRTY;
 
    screen->tex_surface_release(ctx->pipe->screen, &surface);