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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! A pattern tha repeats another pattern.
//! See ps_quad_repeat.glsl.
use api::units::*;
use api::ColorF;
use crate::pattern::PatternBuilder;
use crate::pattern::PatternBuilderContext;
use crate::pattern::PatternBuilderState;
use crate::pattern::{Pattern, PatternKind, PatternShaderInput, PatternTextureInput};
use crate::render_task_graph::RenderTaskId;
use crate::renderer::GpuBufferBuilder;
pub struct RepeatedPattern {
pub stretch_size: LayoutSize,
pub spacing: LayoutSize,
pub src_task_id: RenderTaskId,
pub src_is_opaque: bool,
}
pub fn repeated_pattern(
repeat: &RepeatedPattern,
gpu_buffer_builder: &mut GpuBufferBuilder,
) -> Pattern {
let mut writer = gpu_buffer_builder.f32.write_blocks(1);
writer.push_one([
repeat.stretch_size.width,
repeat.stretch_size.height,
repeat.spacing.width,
repeat.spacing.height,
]);
let repeat_address = writer.finish();
Pattern {
kind: PatternKind::Repeat,
shader_input: PatternShaderInput(
repeat_address.as_int(),
0,
),
texture_input: PatternTextureInput::new(repeat.src_task_id),
base_color: ColorF::WHITE,
is_opaque: repeat.src_is_opaque && repeat.spacing.is_empty(),
}
}
impl PatternBuilder for RepeatedPattern {
fn build(
&self,
_sub_rect: Option<DeviceRect>,
_offset: LayoutVector2D,
_ctx: &PatternBuilderContext,
state: &mut PatternBuilderState,
) -> Pattern {
repeated_pattern(self, state.frame_gpu_data)
}
}