Add enum ImageBufferKind, ImageBufferKind and YuvColorSpace.

Also use enum_from_primitive to convert a primitive to these enum value.

webrender/src/lib.rs

@@ -45,6 +45,10 @@ extern crate bitflags;
 #[macro_use]
 extern crate thread_profiler;
 
+#[macro_use]
+extern crate enum_primitive;
+extern crate num;
+
 mod border;
 mod clip_scroll_node;
 mod clip_scroll_tree;

webrender/src/renderer.rs

@@ -81,6 +81,48 @@ const GPU_TAG_PRIM_BORDER_EDGE: GpuProfileTag = GpuProfileTag { label: "BorderEd
 const GPU_TAG_PRIM_CACHE_IMAGE: GpuProfileTag = GpuProfileTag { label: "CacheImage", color: debug_colors::SILVER };
 const GPU_TAG_BLUR: GpuProfileTag = GpuProfileTag { label: "Blur", color: debug_colors::VIOLET };
 
+enum_from_primitive! {
+    #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+    pub enum ImageBufferKind {
+        Texture2D = 0,
+        TextureRect = 1,
+        TextureExternal = 2,
+        TotalNum = 3,
+    }
+}
+
+impl ImageBufferKind {
+    pub fn get_feature_string(&self) -> &'static str {
+        match *self {
+            ImageBufferKind::Texture2D => "",
+            ImageBufferKind::TextureRect => "TEXTURE_RECT",
+            ImageBufferKind::TextureExternal => "TEXTURE_EXTERNAL",
+            ImageBufferKind::TotalNum => "Invalid",
+        }
+    }
+
+    pub fn is_platform_support(&self, gl_type: &gl::GlType) -> bool {
+        match *gl_type {
+            gl::GlType::Gles => {
+                match *self {
+                    ImageBufferKind::Texture2D => true,
+                    ImageBufferKind::TextureRect => true,
+                    ImageBufferKind::TextureExternal => true,
+                    ImageBufferKind::TotalNum => false,
+                }
+            }
+            gl::GlType::Gl => {
+                match *self {
+                    ImageBufferKind::Texture2D => true,
+                    ImageBufferKind::TextureRect => true,
+                    ImageBufferKind::TextureExternal => false,
+                    ImageBufferKind::TotalNum => false,
+                }
+            }
+        }
+    }
+}
+
 #[derive(Debug, Copy, Clone)]
 pub enum RendererKind {
     Native,

webrender/src/tiling.rs

@@ -17,6 +17,7 @@ use render_task::{AlphaRenderItem, MaskGeometryKind, MaskSegment, RenderTask, Re
 use render_task::{RenderTaskId, RenderTaskIndex, RenderTaskKey, RenderTaskKind};
 use render_task::RenderTaskLocation;
 use renderer::BlendMode;
+use renderer::ImageBufferKind;
 use resource_cache::ResourceCache;
 use std::{f32, i32, mem, usize};
 use std::collections::HashMap;

webrender_traits/src/display_item.rs

@@ -361,11 +361,50 @@ pub struct YuvImageDisplayItem {
     pub color_space: YuvColorSpace,
 }
 
-#[repr(u32)]
-#[derive(Clone, Copy, Debug, Deserialize, Eq, Hash, PartialEq, Serialize)]
-pub enum YuvColorSpace {
-    Rec601 = 1, // The values must match the ones in prim_shared.glsl
-    Rec709 = 2,
+enum_from_primitive! {
+    #[derive(Clone, Copy, Debug, Deserialize, Eq, Hash, PartialEq, Serialize)]
+    pub enum YuvColorSpace {
+        Rec601 = 0,
+        Rec709 = 1,
+        TotalNum = 2,
+    }
+}
+
+impl YuvColorSpace {
+    pub fn get_feature_string(&self) -> &'static str {
+        match *self {
+            YuvColorSpace::Rec601 => "YUV_REC601",
+            YuvColorSpace::Rec709 => "YUV_REC709",
+            YuvColorSpace::TotalNum => "Invalid",
+        }
+    }
+}
+
+enum_from_primitive! {
+    #[derive(Clone, Copy, Debug, Deserialize, Eq, Hash, PartialEq, Serialize)]
+    pub enum YuvFormat {
+        NV12 = 0,
+        PlanarYCbCr = 1,
+        TotalNum = 2,
+    }
+}
+
+impl YuvFormat {
+    pub fn get_plane_num(&self) -> usize {
+        match *self {
+            YuvFormat::NV12 => 2,
+            YuvFormat::PlanarYCbCr => 3,
+            YuvFormat::TotalNum => 0,
+        }
+    }
+
+    pub fn get_feature_string(&self) -> &'static str {
+        match *self {
+            YuvFormat::NV12 => "NV12",
+            YuvFormat::PlanarYCbCr => "",
+            YuvFormat::TotalNum => "Invalid",
+        }
+    }
 }
 
 #[derive(Clone, Copy, Debug, Deserialize, PartialEq, Serialize)]

webrender_traits/src/lib.rs

@@ -31,6 +31,10 @@ extern crate core_graphics;
 #[cfg(target_os = "windows")]
 extern crate dwrote;
 
+#[macro_use]
+extern crate enum_primitive;
+extern crate num;
+
 mod units;
 mod api;
 mod color;