mirror of
https://github.com/thorvg/thorvg.git
synced 2025-06-14 12:04:29 +00:00
9c9999169e
Fix allplience of the blend method, that setuped for scene, but not for a shape Overlay blend func changed to be close to spec
540 lines
19 KiB
C++
540 lines
19 KiB
C++
/*
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* Copyright (c) 2023 - 2024 the ThorVG project. All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "tvgWgShaderSrc.h"
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#include <string>
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//************************************************************************
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// shader pipeline fill
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//************************************************************************
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const char* cShaderSource_PipelineFill = R"(
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// vertex input
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struct VertexInput {
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@location(0) position: vec2f
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};
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// vertex output
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struct VertexOutput {
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@builtin(position) position: vec4f
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};
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// uniforms
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@group(0) @binding(0) var<uniform> uViewMat : mat4x4f;
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@group(1) @binding(0) var<uniform> uModelMat : mat4x4f;
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@vertex
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fn vs_main(in: VertexInput) -> VertexOutput {
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// fill output
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var out: VertexOutput;
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out.position = uViewMat * uModelMat * vec4f(in.position.xy, 0.0, 1.0);
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return out;
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}
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@fragment
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fn fs_main(in: VertexOutput) -> void {
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// nothing to draw, just stencil value
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}
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)";
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//************************************************************************
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// shader pipeline solid
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//************************************************************************
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const char* cShaderSource_PipelineSolid = R"(
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// vertex input
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struct VertexInput {
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@location(0) position: vec2f
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};
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// BlendSettigs
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struct BlendSettigs {
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format : u32, // ColorSpace
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dummy0 : f32,
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dummy1 : f32,
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opacity : f32
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};
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// vertex output
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struct VertexOutput {
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@builtin(position) position: vec4f
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};
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// uniforms
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@group(0) @binding(0) var<uniform> uViewMat : mat4x4f;
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@group(1) @binding(0) var<uniform> uModelMat : mat4x4f;
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@group(1) @binding(1) var<uniform> uBlendSettigs : BlendSettigs;
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@group(2) @binding(0) var<uniform> uSolidColor : vec4f;
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@vertex
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fn vs_main(in: VertexInput) -> VertexOutput {
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// fill output
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var out: VertexOutput;
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out.position = uViewMat * uModelMat * vec4f(in.position.xy, 0.0, 1.0);
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return out;
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}
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@fragment
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fn fs_main(in: VertexOutput) -> @location(0) vec4f {
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// resulting color
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var color = vec4(1.0);
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// get color
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color = uSolidColor;
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return vec4f(color.rgb, color.a * uBlendSettigs.opacity);
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}
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)";
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//************************************************************************
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// shader pipeline linear
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//************************************************************************
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const char* cShaderSource_PipelineLinear = R"(
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// vertex input
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struct VertexInput {
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@location(0) position: vec2f
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};
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// BlendSettigs
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struct BlendSettigs {
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format : u32, // ColorSpace
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dummy0 : f32,
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dummy1 : f32,
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opacity : f32
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};
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// LinearGradient
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const MAX_LINEAR_GRADIENT_STOPS = 32;
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const MAX_LINEAR_GRADIENT_STOPS_PACKED = MAX_LINEAR_GRADIENT_STOPS / 4;
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struct LinearGradient {
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nStops : u32,
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spread : u32,
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dummy0 : u32,
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dummy1 : u32,
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gradStartPos : vec2f,
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gradEndPos : vec2f,
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stopPoints : array<vec4f, MAX_LINEAR_GRADIENT_STOPS_PACKED>,
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stopColors : array<vec4f, MAX_LINEAR_GRADIENT_STOPS>
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};
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// vertex output
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struct VertexOutput {
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@builtin(position) position : vec4f,
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@location(0) vScreenCoord : vec2f
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};
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// uniforms
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@group(0) @binding(0) var<uniform> uViewMat : mat4x4f;
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@group(1) @binding(0) var<uniform> uModelMat : mat4x4f;
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@group(1) @binding(1) var<uniform> uBlendSettigs : BlendSettigs;
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@group(2) @binding(0) var<uniform> uLinearGradient : LinearGradient;
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@vertex
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fn vs_main(in: VertexInput) -> VertexOutput {
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// fill output
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var out: VertexOutput;
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out.position = uViewMat * uModelMat * vec4f(in.position.xy, 0.0, 1.0);
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out.vScreenCoord = in.position.xy;
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return out;
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}
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@fragment
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fn fs_main(in: VertexOutput) -> @location(0) vec4f {
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// resulting color
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var color = vec4(1.0);
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let pos: vec2f = in.vScreenCoord;
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let st: vec2f = uLinearGradient.gradStartPos;
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let ed: vec2f = uLinearGradient.gradEndPos;
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let ba: vec2f = ed - st;
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// get interpolation factor
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var t: f32 = abs(dot(pos - st, ba) / dot(ba, ba));
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// fill spread
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switch uLinearGradient.spread {
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/* Pad */ case 0u: { t = clamp(t, 0.0, 1.0); }
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/* Reflect */ case 1u: { t = select(1.0 - fract(t), fract(t), u32(t) % 2 == 0); }
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/* Repeat */ case 2u: { t = fract(t); }
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default: { t = t; }
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}
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// get stops count
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let last: i32 = i32(uLinearGradient.nStops) - 1;
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// closer than first stop
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if (t <= uLinearGradient.stopPoints[0][0]) {
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color = uLinearGradient.stopColors[0];
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}
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// further than last stop
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if (t >= uLinearGradient.stopPoints[last/4][last%4]) {
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color = uLinearGradient.stopColors[last];
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}
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// look in the middle
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for (var i = 0i; i < last; i++) {
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let strt = uLinearGradient.stopPoints[i/4][i%4];
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let stop = uLinearGradient.stopPoints[(i+1)/4][(i+1)%4];
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if ((t > strt) && (t < stop)) {
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let step: f32 = (t - strt) / (stop - strt);
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color = mix(uLinearGradient.stopColors[i], uLinearGradient.stopColors[i+1], step);
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}
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}
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return vec4f(color.rgb, color.a * uBlendSettigs.opacity);
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}
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)";
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//************************************************************************
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// shader pipeline radial
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//************************************************************************
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const char* cShaderSource_PipelineRadial = R"(
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// vertex input
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struct VertexInput {
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@location(0) position: vec2f
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};
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// BlendSettigs
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struct BlendSettigs {
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format : u32, // ColorSpace
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dummy0 : f32,
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dummy1 : f32,
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opacity : f32
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};
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// RadialGradient
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const MAX_RADIAL_GRADIENT_STOPS = 32;
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const MAX_RADIAL_GRADIENT_STOPS_PACKED = MAX_RADIAL_GRADIENT_STOPS / 4;
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struct RadialGradient {
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nStops : u32,
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spread : u32,
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dummy0 : u32,
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dummy1 : u32,
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centerPos : vec2f,
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radius : vec2f,
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stopPoints : array<vec4f, MAX_RADIAL_GRADIENT_STOPS_PACKED>,
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stopColors : array<vec4f, MAX_RADIAL_GRADIENT_STOPS>
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};
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// vertex output
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struct VertexOutput {
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@builtin(position) position : vec4f,
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@location(0) vScreenCoord : vec2f
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};
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// uniforms
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@group(0) @binding(0) var<uniform> uViewMat : mat4x4f;
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@group(1) @binding(0) var<uniform> uModelMat : mat4x4f;
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@group(1) @binding(1) var<uniform> uBlendSettigs : BlendSettigs;
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@group(2) @binding(0) var<uniform> uRadialGradient : RadialGradient;
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@vertex
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fn vs_main(in: VertexInput) -> VertexOutput {
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// fill output
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var out: VertexOutput;
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out.position = uViewMat * uModelMat * vec4f(in.position.xy, 0.0, 1.0);
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out.vScreenCoord = in.position.xy;
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return out;
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}
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@fragment
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fn fs_main(in: VertexOutput) -> @location(0) vec4f {
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// resulting color
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var color = vec4(1.0);
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// get interpolation factor
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var t: f32 = distance(uRadialGradient.centerPos, in.vScreenCoord) / uRadialGradient.radius.x;
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// fill spread
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switch uRadialGradient.spread {
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/* Pad */ case 0u: { t = clamp(t, 0.0, 1.0); }
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/* Reflect */ case 1u: { t = select(1.0 - fract(t), fract(t), u32(t) % 2 == 0); }
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/* Repeat */ case 2u: { t = fract(t); }
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default: { t = t; }
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}
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// get stops count
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let last: i32 = i32(uRadialGradient.nStops) - 1;
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// closer than first stop
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if (t <= uRadialGradient.stopPoints[0][0]) {
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color = uRadialGradient.stopColors[0];
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}
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// further than last stop
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if (t >= uRadialGradient.stopPoints[last/4][last%4]) {
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color = uRadialGradient.stopColors[last];
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}
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// look in the middle
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for (var i = 0i; i < last; i++) {
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let strt = uRadialGradient.stopPoints[i/4][i%4];
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let stop = uRadialGradient.stopPoints[(i+1)/4][(i+1)%4];
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if ((t > strt) && (t < stop)) {
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let step: f32 = (t - strt) / (stop - strt);
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color = mix(uRadialGradient.stopColors[i], uRadialGradient.stopColors[i+1], step);
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}
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}
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return vec4f(color.rgb, color.a * uBlendSettigs.opacity);
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}
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)";
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//************************************************************************
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// cShaderSource_PipelineImage
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//************************************************************************
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const char* cShaderSource_PipelineImage = R"(
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// vertex input
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struct VertexInput {
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@location(0) position: vec2f,
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@location(1) texCoord: vec2f
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};
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// BlendSettigs
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struct BlendSettigs {
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format : u32, // ColorSpace
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dummy0 : f32,
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dummy1 : f32,
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opacity : f32
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};
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// vertex output
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struct VertexOutput {
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@builtin(position) position: vec4f,
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@location(0) texCoord: vec2f
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};
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@group(0) @binding(0) var<uniform> uViewMat : mat4x4f;
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@group(1) @binding(0) var<uniform> uModelMat : mat4x4f;
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@group(1) @binding(1) var<uniform> uBlendSettigs : BlendSettigs;
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@group(2) @binding(0) var uSampler : sampler;
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@group(2) @binding(1) var uTextureView : texture_2d<f32>;
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@vertex
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fn vs_main(in: VertexInput) -> VertexOutput {
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// fill output
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var out: VertexOutput;
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out.position = uViewMat * uModelMat * vec4f(in.position.xy, 0.0, 1.0);
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out.texCoord = in.texCoord;
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return out;
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}
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@fragment
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fn fs_main(in: VertexOutput) -> @location(0) vec4f {
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var color: vec4f = textureSample(uTextureView, uSampler, in.texCoord.xy);
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var result: vec4f = color;
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var format: u32 = uBlendSettigs.format;
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if (format == 1u) { /* FMT_ARGB8888 */
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result = color.bgra;
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} else if (format == 2u) { /* FMT_ABGR8888S */
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result = vec4(color.rgb * color.a, color.a);
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} else if (format == 3u) { /* FMT_ARGB8888S */
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result = vec4(color.bgr * color.a, color.a);
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}
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return vec4f(result.rgb, result.a * uBlendSettigs.opacity);
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};
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)";
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//************************************************************************
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// cShaderSource_PipelineComputeBlend
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//************************************************************************
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// pipeline shader modules clear
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const char* cShaderSource_PipelineComputeClear = R"(
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@group(0) @binding(0) var imageDst : texture_storage_2d<rgba8unorm, read_write>;
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@compute @workgroup_size(8, 8)
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fn cs_main( @builtin(global_invocation_id) id: vec3u) {
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textureStore(imageDst, id.xy, vec4f(0.0, 0.0, 0.0, 0.0));
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}
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)";
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// pipeline shader modules blend
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const char* cShaderSource_PipelineComputeBlend = R"(
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@group(0) @binding(0) var imageSrc : texture_storage_2d<rgba8unorm, read_write>;
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@group(1) @binding(0) var imageDst : texture_storage_2d<rgba8unorm, read_write>;
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@group(2) @binding(0) var<uniform> blendMethod : u32;
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@compute @workgroup_size(8, 8)
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fn cs_main( @builtin(global_invocation_id) id: vec3u) {
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let texSize = textureDimensions(imageSrc);
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if ((id.x >= texSize.x) || (id.y >= texSize.y)) { return; };
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let srcColor = textureLoad(imageSrc, id.xy);
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if (srcColor.a == 0.0) { return; };
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let dstColor = textureLoad(imageDst, id.xy);
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let Sa: f32 = srcColor.a;
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let Da: f32 = dstColor.a;
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let S: vec3f = srcColor.xyz;
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let D: vec3f = dstColor.xyz;
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let One: vec3f = vec3(1.0);
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var color: vec3f = vec3f(0.0, 0.0, 0.0);
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switch blendMethod {
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/* Normal */ case 0u: { color = (Sa * S) + (1.0 - Sa) * D; }
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/* Add */ case 1u: { color = (S + D); }
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/* Screen */ case 2u: { color = (S + D) - (S * D); }
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/* Multiply */ case 3u: { color = (S * D); }
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/* Overlay */ case 4u: { color = (Sa * Da) - 2 * (Da - S) * (Sa - D); }
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/* Difference */ case 5u: { color = abs(S - D); }
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/* Exclusion */ case 6u: { color = S + D - (2 * S * D); }
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/* SrcOver */ case 7u: { color = S; }
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/* Darken */ case 8u: { color = min(S, D); }
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/* Lighten */ case 9u: { color = max(S, D); }
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/* ColorDodge */ case 10u: { color = D / (One - S); }
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/* ColorBurn */ case 11u: { color = One - (One - D) / S; }
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/* HardLight */ case 12u: { color = (Sa * Da) - 2.0 * (Da - S) * (Sa - D); }
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/* SoftLight */ case 13u: { color = (One - 2 * S) * (D * D) + (2 * S * D); }
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default: { color = (Sa * S) + (1.0 - Sa) * D; }
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}
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textureStore(imageDst, id.xy, vec4f(color, Sa));
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}
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)";
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// pipeline shader modules compose
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const char* cShaderSource_PipelineComputeCompose = R"(
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@group(0) @binding(0) var imageSrc : texture_storage_2d<rgba8unorm, read_write>;
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@group(1) @binding(0) var imageMsk : texture_storage_2d<rgba8unorm, read_write>;
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@group(2) @binding(0) var<uniform> composeMethod : u32;
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@group(3) @binding(0) var<uniform> opacity : f32;
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@compute @workgroup_size(8, 8)
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fn cs_main( @builtin(global_invocation_id) id: vec3u) {
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let texSize = textureDimensions(imageSrc);
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if ((id.x >= texSize.x) || (id.y >= texSize.y)) { return; };
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let colorSrc = textureLoad(imageSrc, id.xy);
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let colorMsk = textureLoad(imageMsk, id.xy);
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var color: vec3f = colorSrc.xyz;
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var alpha: f32 = colorMsk.a;
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switch composeMethod {
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/* None */ case 0u: { color = colorSrc.xyz; }
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/* ClipPath */ case 1u: { if (colorMsk.a == 0) { alpha = 0.0; }; }
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/* AlphaMask */ case 2u: { color = mix(colorMsk.xyz, colorSrc.xyz, colorSrc.a * colorMsk.b); }
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/* InvAlphaMask */ case 3u: { color = mix(colorSrc.xyz, colorMsk.xyz, colorSrc.a * colorMsk.b); alpha = 1.0 - colorMsk.b; }
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/* LumaMask */ case 4u: { color = colorSrc.xyz * (0.299 * colorMsk.r + 0.587 * colorMsk.g + 0.114 * colorMsk.b); }
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/* InvLumaMask */ case 5u: { color = colorSrc.xyz * (1.0 - (0.299 * colorMsk.r + 0.587 * colorMsk.g + 0.114 * colorMsk.b)); alpha = 1.0 - colorMsk.b; }
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/* AddMask */ case 6u: { color = colorSrc.xyz * colorSrc.a + colorMsk.xyz * (1.0 - colorSrc.a); }
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/* SubtractMask */ case 7u: { color = colorSrc.xyz * colorSrc.a - colorMsk.xyz * (1.0 - colorSrc.a); }
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/* IntersectMask */ case 8u: { color = colorSrc.xyz * min(colorSrc.a, colorMsk.a); }
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/* DifferenceMask */ case 9u: { color = abs(colorSrc.xyz - colorMsk.xyz * (1.0 - colorMsk.a)); }
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default: { color = colorSrc.xyz; }
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}
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textureStore(imageSrc, id.xy, vec4f(color, alpha * opacity));
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}
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)";
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// pipeline shader modules compose blend
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const char* cShaderSource_PipelineComputeComposeBlend = R"(
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@group(0) @binding(0) var imageSrc : texture_storage_2d<rgba8unorm, read>;
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@group(0) @binding(1) var imageMsk : texture_storage_2d<rgba8unorm, read>;
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@group(0) @binding(2) var imageDst : texture_storage_2d<rgba8unorm, read_write>;
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@group(1) @binding(0) var<uniform> composeMethod : u32;
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@group(2) @binding(0) var<uniform> blendMethod : u32;
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@group(3) @binding(0) var<uniform> opacity : f32;
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@compute @workgroup_size(8, 8)
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fn cs_main( @builtin(global_invocation_id) id: vec3u) {
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let texSize = textureDimensions(imageSrc);
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if ((id.x >= texSize.x) || (id.y >= texSize.y)) { return; };
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let colorSrc = textureLoad(imageSrc, id.xy);
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let colorMsk = textureLoad(imageMsk, id.xy);
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if ((length(colorSrc) == 0.0) || (length(colorMsk) == 0.0)) { return; };
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let colorDst = textureLoad(imageDst, id.xy);
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var color: vec3f = colorSrc.xyz;
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var alpha: f32 = colorMsk.a;
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let luma: f32 = dot(colorMsk.xyz, vec3f(0.299, 0.587, 0.114));
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switch composeMethod {
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/* None */ case 0u: { color = colorSrc.xyz; }
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/* ClipPath */ case 1u: { if (colorMsk.a == 0) { alpha = 0.0; }; }
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/* AlphaMask */ case 2u: { color = colorSrc.xyz; alpha = colorSrc.a * colorMsk.a; }
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/* InvAlphaMask */ case 3u: { color = colorSrc.xyz; alpha = colorSrc.a * (1.0 - colorMsk.a); }
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/* LumaMask */ case 4u: { color = colorSrc.xyz; alpha = colorSrc.a * luma; }
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/* InvLumaMask */ case 5u: { color = colorSrc.xyz; alpha = colorSrc.a * (1.0 - luma); }
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/* AddMask */ case 6u: { color = colorSrc.xyz * colorSrc.a + colorMsk.xyz * (1.0 - colorSrc.a); }
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/* SubtractMask */ case 7u: { color = colorSrc.xyz * colorSrc.a - colorMsk.xyz * (1.0 - colorSrc.a); }
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/* IntersectMask */ case 8u: { color = colorSrc.xyz * min(colorSrc.a, colorMsk.a); }
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/* DifferenceMask */ case 9u: { color = abs(colorMsk.xyz - colorSrc.xyz * (1.0 - colorMsk.a)); }
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default: { color = colorSrc.xyz; }
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}
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let S: vec3f = color.xyz;
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let D: vec3f = colorDst.xyz;
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let Sa: f32 = alpha;
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let Da: f32 = colorDst.a;
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let One: vec3f = vec3(1.0);
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switch blendMethod {
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/* Normal */ case 0u: { color = (Sa * S) + (1.0 - Sa) * D; }
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/* Add */ case 1u: { color = (S + D); }
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/* Screen */ case 2u: { color = (S + D) - (S * D); }
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/* Multiply */ case 3u: { color = (S * D); }
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/* Overlay */ case 4u: { color = (Sa * Da) - 2 * (Da - S) * (Sa - D); }
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/* Difference */ case 5u: { color = abs(S - D); }
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/* Exclusion */ case 6u: { color = S + D - (2 * S * D); }
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/* SrcOver */ case 7u: { color = S; }
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/* Darken */ case 8u: { color = min(S, D); }
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/* Lighten */ case 9u: { color = max(S, D); }
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/* ColorDodge */ case 10u: { color = D / (One - S); }
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/* ColorBurn */ case 11u: { color = One - (One - D) / S; }
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/* HardLight */ case 12u: { color = (Sa * Da) - 2.0 * (Da - S) * (Sa - D); }
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/* SoftLight */ case 13u: { color = (One - 2 * S) * (D * D) + (2 * S * D); }
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default: { color = (Sa * S) + (1.0 - Sa) * D; }
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}
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textureStore(imageDst, id.xy, vec4f(color, Sa));
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}
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)";
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// pipeline shader modules anti-aliasing
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const char* cShaderSource_PipelineComputeAntiAlias = R"(
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@group(0) @binding(0) var imageSrc : texture_storage_2d<rgba8unorm, read_write>;
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@group(1) @binding(0) var imageDst : texture_storage_2d<bgra8unorm, write>;
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@compute @workgroup_size(8, 8)
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fn cs_main( @builtin(global_invocation_id) id: vec3u) {
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let texSizeSrc = textureDimensions(imageSrc);
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let texSizeDst = textureDimensions(imageDst);
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if ((id.x >= texSizeDst.x) || (id.y >= texSizeDst.y)) { return; };
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let samples = u32(texSizeSrc.x / texSizeDst.x);
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var color = vec4f(0);
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for (var i = 0u; i < samples; i++) {
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for (var j = 0u; j < samples; j++) {
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color += textureLoad(imageSrc, vec2(id.x * samples + j, id.y * samples + i));
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}
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}
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textureStore(imageDst, id.xy, color / f32(samples * samples));
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}
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)";
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