tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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pattern.rs (3878B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 use api::{ColorF, units::DeviceRect};
      6 
      7 use crate::clip::ClipStore;
      8 use crate::frame_builder::FrameBuilderConfig;
      9 use crate::render_task_graph::{RenderTaskGraphBuilder, RenderTaskId};
     10 use crate::renderer::GpuBufferBuilder;
     11 use crate::scene::SceneProperties;
     12 use crate::spatial_tree::SpatialTree;
     13 
     14 #[repr(u32)]
     15 #[cfg_attr(feature = "capture", derive(Serialize))]
     16 #[cfg_attr(feature = "replay", derive(Deserialize))]
     17 #[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
     18 pub enum PatternKind {
     19    ColorOrTexture = 0,
     20    RadialGradient = 1,
     21    ConicGradient = 2,
     22    Gradient = 3,
     23 
     24    Mask = 4,
     25    // When adding patterns, don't forget to update the NUM_PATTERNS constant.
     26 }
     27 
     28 pub const NUM_PATTERNS: u32 = 5;
     29 
     30 impl PatternKind {
     31    pub fn from_u32(val: u32) -> Self {
     32        assert!(val < NUM_PATTERNS);
     33        unsafe { std::mem::transmute(val) }
     34    }
     35 }
     36 
     37 /// A 32bit payload used as input for the pattern-specific logic in the shader.
     38 ///
     39 /// Patterns typically use it as a GpuBuffer offset to fetch their data.
     40 #[cfg_attr(feature = "capture", derive(Serialize))]
     41 #[cfg_attr(feature = "replay", derive(Deserialize))]
     42 #[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
     43 pub struct PatternShaderInput(pub i32, pub i32);
     44 
     45 impl Default for PatternShaderInput {
     46    fn default() -> Self {
     47        PatternShaderInput(0, 0)
     48    }
     49 }
     50 
     51 #[cfg_attr(feature = "capture", derive(Serialize))]
     52 #[cfg_attr(feature = "replay", derive(Deserialize))]
     53 #[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
     54 pub struct PatternTextureInput {
     55    pub task_id: RenderTaskId,
     56 }
     57 
     58 impl Default for PatternTextureInput {
     59    fn default() -> Self {
     60        PatternTextureInput {
     61            task_id: RenderTaskId::INVALID,
     62        }
     63    }
     64 }
     65 
     66 impl PatternTextureInput {
     67    pub fn new(task_id: RenderTaskId) -> Self {
     68        PatternTextureInput {
     69            task_id,
     70        }
     71    }
     72 }
     73 
     74 pub struct PatternBuilderContext<'a> {
     75    pub scene_properties: &'a SceneProperties,
     76    pub spatial_tree: &'a SpatialTree,
     77    pub fb_config: &'a FrameBuilderConfig,
     78 }
     79 
     80 pub struct PatternBuilderState<'a> {
     81    pub frame_gpu_data: &'a mut GpuBufferBuilder,
     82    pub rg_builder: &'a mut RenderTaskGraphBuilder,
     83    pub clip_store: &'a mut ClipStore,
     84 }
     85 
     86 pub trait PatternBuilder {
     87    fn build(
     88        &self,
     89        _sub_rect: Option<DeviceRect>,
     90        _ctx: &PatternBuilderContext,
     91        _state: &mut PatternBuilderState,
     92    ) -> Pattern;
     93 
     94    fn get_base_color(
     95        &self,
     96        _ctx: &PatternBuilderContext,
     97    ) -> ColorF;
     98 
     99    fn use_shared_pattern(
    100        &self,
    101    ) -> bool;
    102 
    103    fn can_use_nine_patch(&self) -> bool {
    104        true
    105    }
    106 }
    107 
    108 #[cfg_attr(feature = "capture", derive(Serialize))]
    109 #[derive(Clone, Debug)]
    110 pub struct Pattern {
    111    pub kind: PatternKind,
    112    pub shader_input: PatternShaderInput,
    113    pub texture_input: PatternTextureInput,
    114    pub base_color: ColorF,
    115    pub is_opaque: bool,
    116 }
    117 
    118 impl Pattern {
    119    pub fn texture(task_id: RenderTaskId, color: ColorF) -> Self {
    120        Pattern {
    121            kind: PatternKind::ColorOrTexture,
    122            shader_input: PatternShaderInput::default(),
    123            texture_input: PatternTextureInput::new(task_id),
    124            base_color: color,
    125            // TODO(gw): We may want to add support to render tasks to query
    126            //           if they are known to be opaque.
    127            is_opaque: false,
    128        }
    129    }
    130 
    131    pub fn color(color: ColorF) -> Self {
    132        Pattern {
    133            kind: PatternKind::ColorOrTexture,
    134            shader_input: PatternShaderInput::default(),
    135            texture_input: PatternTextureInput::default(),
    136            base_color: color,
    137            is_opaque: color.a >= 1.0,
    138        }
    139    }
    140 }