Bug 1883336 - Make patterns work for composited quads. r=gw

Differential Revision: https://phabricator.services.mozilla.com/D204773

gfx/wr/webrender/src/quad.rs

@@ -518,7 +518,7 @@ fn add_composite_prim(
 
     frame_state.push_cmd(
         &PrimitiveCommand::quad(
-            pattern.kind,
+            PatternKind::ColorOrTexture,
             pattern.shader_input,
             prim_instance_index,
             composite_prim_address,

gfx/wr/webrender/src/render_target.rs

@@ -211,6 +211,7 @@ impl<T: RenderTarget> RenderTargetList<T> {
     }
 }
 
+const NUM_PATTERNS: usize = crate::pattern::NUM_PATTERNS as usize;
 
 /// Contains the work (in the form of instance arrays) needed to fill a color
 /// color output surface (RGBA8).
@@ -236,8 +237,8 @@ pub struct ColorRenderTarget {
     pub resolve_ops: Vec<ResolveOp>,
     pub clear_color: Option<ColorF>,
 
-    pub prim_instances: Vec<PrimitiveInstanceData>,
-    pub prim_instances_with_scissor: FastHashMap<DeviceIntRect, Vec<PrimitiveInstanceData>>,
+    pub prim_instances: [Vec<PrimitiveInstanceData>; NUM_PATTERNS],
+    pub prim_instances_with_scissor: FastHashMap<(DeviceIntRect, PatternKind), Vec<PrimitiveInstanceData>>,
     
     pub clip_masks: ClipMaskInstanceList,
 }
@@ -262,7 +263,7 @@ impl RenderTarget for ColorRenderTarget {
             used_rect,
             resolve_ops: Vec::new(),
             clear_color: Some(ColorF::TRANSPARENT),
-            prim_instances: Vec::new(),
+            prim_instances: [Vec::new(), Vec::new()],
             prim_instances_with_scissor: FastHashMap::default(),
             clip_masks: ClipMaskInstanceList::new(),
         }
@@ -393,11 +394,11 @@ impl RenderTarget for ColorRenderTarget {
                     |_, instance| {
                         if info.prim_needs_scissor_rect {
                             self.prim_instances_with_scissor
-                                .entry(target_rect)
+                                .entry((target_rect, info.pattern))
                                 .or_insert(Vec::new())
                                 .push(instance);
                         } else {
-                            self.prim_instances.push(instance);
+                            self.prim_instances[info.pattern as usize].push(instance);
                         }
                     }
                 );

gfx/wr/webrender/src/renderer/mod.rs

@@ -2173,8 +2173,8 @@ impl Renderer {
     fn handle_prims(
         &mut self,
         draw_target: &DrawTarget,
-        prim_instances: &[PrimitiveInstanceData],
-        prim_instances_with_scissor: &FastHashMap<DeviceIntRect, Vec<PrimitiveInstanceData>>,
+        prim_instances: &[Vec<PrimitiveInstanceData>],
+        prim_instances_with_scissor: &FastHashMap<(DeviceIntRect, PatternKind), Vec<PrimitiveInstanceData>>,
         projection: &default::Transform3D<f32>,
         stats: &mut RendererStats,
     ) {
@@ -2183,10 +2183,17 @@ impl Renderer {
         {
             let _timer = self.gpu_profiler.start_timer(GPU_TAG_INDIRECT_PRIM);
 
-            if !prim_instances.is_empty() {
+            if prim_instances.iter().any(|instances| !instances.is_empty()) {
                 self.set_blend(false, FramebufferKind::Other);
+            }
 
-                self.shaders.borrow_mut().ps_quad_textured.bind(
+            for (pattern_idx, prim_instances) in prim_instances.iter().enumerate() {
+                if prim_instances.is_empty() {
+                    continue;
+                }
+                let pattern = PatternKind::from_u32(pattern_idx as u32);
+
+                self.shaders.borrow_mut().get_quad_shader(pattern).bind(
                     &mut self.device,
                     projection,
                     None,
@@ -2194,10 +2201,13 @@ impl Renderer {
                     &mut self.profile,
                 );
 
+                // TODO: Some patterns will need to be able to sample textures.
+                let texture_bindings = BatchTextures::empty();
+
                 self.draw_instanced_batch(
                     prim_instances,
                     VertexArrayKind::Primitive,
-                    &BatchTextures::empty(),
+                    &texture_bindings,
                     stats,
                 );
             }
@@ -2207,17 +2217,22 @@ impl Renderer {
                 self.device.set_blend_mode_premultiplied_alpha();
                 self.device.enable_scissor();
 
-                self.shaders.borrow_mut().ps_quad_textured.bind(
+                let mut prev_pattern = None;
+
+                for ((scissor_rect, pattern), prim_instances) in prim_instances_with_scissor {
+                    if prev_pattern != Some(*pattern) {
+                        prev_pattern = Some(*pattern);
+                        self.shaders.borrow_mut().get_quad_shader(*pattern).bind(
                             &mut self.device,
                             projection,
                             None,
                             &mut self.renderer_errors,
                             &mut self.profile,
                         );
+                    }
 
-                for (scissor_rect, prim_instances) in prim_instances_with_scissor {
                     self.device.set_scissor_rect(draw_target.to_framebuffer_rect(*scissor_rect));
-
+                    // TODO: hook up the right pattern.
                     self.draw_instanced_batch(
                         prim_instances,
                         VertexArrayKind::Primitive,

gfx/wr/webrender/src/renderer/shade.rs

@@ -1154,6 +1154,16 @@ impl Shaders {
             .expect("bug: unsupported scale shader requested")
     }
 
+    pub fn get_quad_shader(
+        &mut self,
+        pattern: PatternKind
+    ) -> &mut LazilyCompiledShader {
+        match pattern {
+            PatternKind::ColorOrTexture => &mut self.ps_quad_textured,
+            PatternKind::Mask => unreachable!(),
+        }
+    }
+
     pub fn get(&
         mut self,
         key: &BatchKey,