Mojom interface for Surfaces service

mojo/services/public/interfaces/surfaces/quads.mojom

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import "../geometry/geometry.mojom"
+import "surface_id.mojom"
+
+module mojo.surfaces {
+
+struct Color {
+  uint32 rgba;
+};
+
+// TODO(jamesr): Populate subtype fields.
+struct CheckerboardQuadState {};
+
+struct DebugBorderQuadState {};
+
+struct IoSurfaceContentQuadState {};
+
+struct RenderPassQuadState {};
+
+struct SolidColorQuadState {
+  Color color;
+};
+
+struct SurfaceQuadState {
+  SurfaceId surface;
+};
+
+struct TextureQuadState {
+  uint32 resource_id;
+  bool premultiplied_alpha;
+  mojo.PointF uv_top_left;
+  mojo.PointF uv_bottom_right;
+  Color background_color;
+  // Should have exactly 4 entries.
+  float[] vertex_opacity;
+  bool flipped;
+};
+
+struct TiledContentQuadState {};
+
+struct StreamVideoQuadState {};
+
+struct YUVVideoQuadState {};
+
+enum Material {
+  CHECKERBOARD = 1,
+  DEBUG_BORDER,
+  IO_SURFACE_CONTENT,
+  RENDER_PASS,
+  SOLID_COLOR,
+  STREAM_VIDEO_CONTENT,
+  SURFACE_CONTENT,
+  TEXTURE_CONTENT,
+  TILED_CONTENT,
+  YUV_VIDEO_CONTENT,
+};
+
+struct Quad {
+  Material material;
+
+  // This rect, after applying the quad_transform(), gives the geometry that
+  // this quad should draw to. This rect lives in content space.
+  mojo.Rect rect;
+
+  // This specifies the region of the quad that is opaque. This rect lives in
+  // content space.
+  mojo.Rect opaque_rect;
+
+  // Allows changing the rect that gets drawn to make it smaller. This value
+  // should be clipped to |rect|. This rect lives in content space.
+  mojo.Rect visible_rect;
+
+  // Allows changing the rect that gets drawn to make it smaller. This value
+  // should be clipped to |rect|. This rect lives in content space.
+  bool needs_blending;
+
+  // Index into the containing pass' shared quad state array which has state
+  // (transforms etc) shared by multiple quads.
+  int32 shared_quad_state_index;
+  
+  // Only one of the following will be set, depending on the material.
+  CheckerboardQuadState checkerboard_quad_state;
+  DebugBorderQuadState debug_border_quad_state;
+  IoSurfaceContentQuadState io_surface_quad_state;
+  RenderPassQuadState render_pass_quad_state;
+  SolidColorQuadState solid_color_quad_state;
+  SurfaceQuadState surface_quad_state;
+  TextureQuadState texture_quad_state;
+  TiledContentQuadState tiled_content_quad_state;
+  StreamVideoQuadState stream_video_quad_state;
+  YUVVideoQuadState yuv_video_quad_state;
+};
+
+enum SkXfermode {
+  kClear_Mode = 0,    //!< [0, 0]
+  kSrc_Mode,      //!< [Sa, Sc]
+  kDst_Mode,      //!< [Da, Dc]
+  kSrcOver_Mode,  //!< [Sa + Da - Sa*Da, Rc = Sc + (1 - Sa)*Dc]
+  kDstOver_Mode,  //!< [Sa + Da - Sa*Da, Rc = Dc + (1 - Da)*Sc]
+  kSrcIn_Mode,    //!< [Sa * Da, Sc * Da]
+  kDstIn_Mode,    //!< [Sa * Da, Sa * Dc]
+  kSrcOut_Mode,   //!< [Sa * (1 - Da), Sc * (1 - Da)]
+  kDstOut_Mode,   //!< [Da * (1 - Sa), Dc * (1 - Sa)]
+  kSrcATop_Mode,  //!< [Da, Sc * Da + (1 - Sa) * Dc]
+  kDstATop_Mode,  //!< [Sa, Sa * Dc + Sc * (1 - Da)]
+  kXor_Mode,      //!< [Sa + Da - 2 * Sa * Da, Sc * (1 - Da) + (1 - Sa) * Dc]
+  kPlus_Mode,     //!< [Sa + Da, Sc + Dc]
+  kModulate_Mode, // multiplies all components (= alpha and color)
+
+  // Following blend modes are defined in the CSS Compositing standard:
+  // https://dvcs.w3.org/hg/FXTF/rawfile/tip/compositing/index.html#blending
+  kScreen_Mode,
+  kLastCoeffMode = kScreen_Mode,
+
+  kOverlay_Mode,
+  kDarken_Mode,
+  kLighten_Mode,
+  kColorDodge_Mode,
+  kColorBurn_Mode,
+  kHardLight_Mode,
+  kSoftLight_Mode,
+  kDifference_Mode,
+  kExclusion_Mode,
+  kMultiply_Mode,
+  kLastSeparableMode = kMultiply_Mode,
+
+  kHue_Mode,
+  kSaturation_Mode,
+  kColor_Mode,
+  kLuminosity_Mode,
+  kLastMode = kLuminosity_Mode
+};
+
+struct SharedQuadState {
+  // Transforms from quad's original content space to its target content space.
+  mojo.Transform content_to_target_transform;
+
+  // This size lives in the content space for the quad's originating layer.
+  mojo.Size content_bounds;
+
+  // This rect lives in the content space for the quad's originating layer.
+  mojo.Rect visible_content_rect;
+
+  // This rect lives in the target content space.
+  mojo.Rect clip_rect;
+
+  bool is_clipped;
+  float opacity;
+  SkXfermode blend_mode;
+};
+
+struct Pass {
+  int32 id;
+  mojo.Rect output_rect;
+  mojo.Rect damage_rect;
+  mojo.Transform transform_to_root_target;
+  bool has_transparent_pixels;
+  Quad[] quads;
+  SharedQuadState[] shared_quad_states;
+};
+
+}