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| 1 | +// Copyright 2013 The Flutter Authors. All rights reserved. |
| 2 | +// Use of this source code is governed by a BSD-style license that can be |
| 3 | +// found in the LICENSE file. |
| 4 | + |
| 5 | +#include "foreground_blend_contents.h" |
| 6 | + |
| 7 | +#include "flutter/impeller/entity/contents/content_context.h" |
| 8 | +#include "flutter/impeller/renderer/render_pass.h" |
| 9 | +#include "flutter/impeller/renderer/sampler_library.h" |
| 10 | + |
| 11 | +namespace impeller { |
| 12 | + |
| 13 | +AdvancedForegroundBlendContents::AdvancedForegroundBlendContents() {} |
| 14 | + |
| 15 | +AdvancedForegroundBlendContents::~AdvancedForegroundBlendContents() {} |
| 16 | + |
| 17 | +void AdvancedForegroundBlendContents::SetBlendMode(BlendMode blend_mode) { |
| 18 | + FML_DCHECK(blend_mode > Entity::kLastPipelineBlendMode); |
| 19 | + blend_mode_ = blend_mode; |
| 20 | +} |
| 21 | + |
| 22 | +void AdvancedForegroundBlendContents::SetSrcInput( |
| 23 | + std::shared_ptr<FilterInput> input) { |
| 24 | + input_ = std::move(input); |
| 25 | +} |
| 26 | + |
| 27 | +void AdvancedForegroundBlendContents::SetForegroundColor(Color color) { |
| 28 | + foreground_color_ = color; |
| 29 | +} |
| 30 | + |
| 31 | +void AdvancedForegroundBlendContents::SetCoverage(Rect rect) { |
| 32 | + rect_ = rect; |
| 33 | +} |
| 34 | + |
| 35 | +std::optional<Rect> AdvancedForegroundBlendContents::GetCoverage( |
| 36 | + const Entity& entity) const { |
| 37 | + return rect_.TransformBounds(entity.GetTransformation()); |
| 38 | +} |
| 39 | + |
| 40 | +bool AdvancedForegroundBlendContents::Render(const ContentContext& renderer, |
| 41 | + const Entity& entity, |
| 42 | + RenderPass& pass) const { |
| 43 | + using VS = BlendScreenPipeline::VertexShader; |
| 44 | + using FS = BlendScreenPipeline::FragmentShader; |
| 45 | + |
| 46 | + auto& host_buffer = pass.GetTransientsBuffer(); |
| 47 | + |
| 48 | + auto dst_snapshot = input_->GetSnapshot(renderer, entity); |
| 49 | + if (!dst_snapshot.has_value()) { |
| 50 | + return false; |
| 51 | + } |
| 52 | + auto maybe_dst_uvs = dst_snapshot->GetCoverageUVs(rect_); |
| 53 | + if (!maybe_dst_uvs.has_value()) { |
| 54 | + return false; |
| 55 | + } |
| 56 | + auto dst_uvs = maybe_dst_uvs.value(); |
| 57 | + |
| 58 | + auto size = rect_.size; |
| 59 | + VertexBufferBuilder<VS::PerVertexData> vtx_builder; |
| 60 | + vtx_builder.AddVertices({ |
| 61 | + {Point(0, 0), dst_uvs[0], dst_uvs[0]}, |
| 62 | + {Point(size.width, 0), dst_uvs[1], dst_uvs[1]}, |
| 63 | + {Point(size.width, size.height), dst_uvs[3], dst_uvs[3]}, |
| 64 | + {Point(0, 0), dst_uvs[0], dst_uvs[0]}, |
| 65 | + {Point(size.width, size.height), dst_uvs[3], dst_uvs[3]}, |
| 66 | + {Point(0, size.height), dst_uvs[2], dst_uvs[2]}, |
| 67 | + }); |
| 68 | + auto vtx_buffer = vtx_builder.CreateVertexBuffer(host_buffer); |
| 69 | + |
| 70 | + Command cmd; |
| 71 | + cmd.label = "Foreground Advanced Blend Filter"; |
| 72 | + cmd.BindVertices(vtx_buffer); |
| 73 | + cmd.stencil_reference = entity.GetStencilDepth(); |
| 74 | + auto options = OptionsFromPass(pass); |
| 75 | + |
| 76 | + switch (blend_mode_) { |
| 77 | + case BlendMode::kScreen: |
| 78 | + cmd.pipeline = renderer.GetBlendScreenPipeline(options); |
| 79 | + break; |
| 80 | + case BlendMode::kOverlay: |
| 81 | + cmd.pipeline = renderer.GetBlendOverlayPipeline(options); |
| 82 | + break; |
| 83 | + case BlendMode::kDarken: |
| 84 | + cmd.pipeline = renderer.GetBlendDarkenPipeline(options); |
| 85 | + break; |
| 86 | + case BlendMode::kLighten: |
| 87 | + cmd.pipeline = renderer.GetBlendLightenPipeline(options); |
| 88 | + break; |
| 89 | + case BlendMode::kColorDodge: |
| 90 | + cmd.pipeline = renderer.GetBlendColorDodgePipeline(options); |
| 91 | + break; |
| 92 | + case BlendMode::kColorBurn: |
| 93 | + cmd.pipeline = renderer.GetBlendColorBurnPipeline(options); |
| 94 | + break; |
| 95 | + case BlendMode::kHardLight: |
| 96 | + cmd.pipeline = renderer.GetBlendHardLightPipeline(options); |
| 97 | + break; |
| 98 | + case BlendMode::kSoftLight: |
| 99 | + cmd.pipeline = renderer.GetBlendSoftLightPipeline(options); |
| 100 | + break; |
| 101 | + case BlendMode::kDifference: |
| 102 | + cmd.pipeline = renderer.GetBlendDifferencePipeline(options); |
| 103 | + break; |
| 104 | + case BlendMode::kExclusion: |
| 105 | + cmd.pipeline = renderer.GetBlendExclusionPipeline(options); |
| 106 | + break; |
| 107 | + case BlendMode::kMultiply: |
| 108 | + cmd.pipeline = renderer.GetBlendMultiplyPipeline(options); |
| 109 | + break; |
| 110 | + case BlendMode::kHue: |
| 111 | + cmd.pipeline = renderer.GetBlendHuePipeline(options); |
| 112 | + break; |
| 113 | + case BlendMode::kSaturation: |
| 114 | + cmd.pipeline = renderer.GetBlendSaturationPipeline(options); |
| 115 | + break; |
| 116 | + case BlendMode::kColor: |
| 117 | + cmd.pipeline = renderer.GetBlendColorPipeline(options); |
| 118 | + break; |
| 119 | + case BlendMode::kLuminosity: |
| 120 | + cmd.pipeline = renderer.GetBlendLuminosityPipeline(options); |
| 121 | + break; |
| 122 | + default: |
| 123 | + return false; |
| 124 | + } |
| 125 | + |
| 126 | + FS::BlendInfo blend_info; |
| 127 | + VS::FrameInfo frame_info; |
| 128 | + |
| 129 | + auto dst_sampler_descriptor = dst_snapshot->sampler_descriptor; |
| 130 | + if (renderer.GetDeviceCapabilities().SupportsDecalTileMode()) { |
| 131 | + dst_sampler_descriptor.width_address_mode = SamplerAddressMode::kDecal; |
| 132 | + dst_sampler_descriptor.height_address_mode = SamplerAddressMode::kDecal; |
| 133 | + } |
| 134 | + auto dst_sampler = renderer.GetContext()->GetSamplerLibrary()->GetSampler( |
| 135 | + dst_sampler_descriptor); |
| 136 | + FS::BindTextureSamplerDst(cmd, dst_snapshot->texture, dst_sampler); |
| 137 | + frame_info.dst_y_coord_scale = dst_snapshot->texture->GetYCoordScale(); |
| 138 | + blend_info.dst_input_alpha = dst_snapshot->opacity; |
| 139 | + |
| 140 | + blend_info.color_factor = 1; |
| 141 | + blend_info.color = foreground_color_; |
| 142 | + // This texture will not be sampled from due to the color factor. But |
| 143 | + // this is present so that validation doesn't trip on a missing |
| 144 | + // binding. |
| 145 | + FS::BindTextureSamplerSrc(cmd, dst_snapshot->texture, dst_sampler); |
| 146 | + |
| 147 | + auto blend_uniform = host_buffer.EmplaceUniform(blend_info); |
| 148 | + FS::BindBlendInfo(cmd, blend_uniform); |
| 149 | + |
| 150 | + frame_info.mvp = Matrix::MakeOrthographic(pass.GetRenderTargetSize()) * |
| 151 | + entity.GetTransformation(); |
| 152 | + |
| 153 | + auto uniform_view = host_buffer.EmplaceUniform(frame_info); |
| 154 | + VS::BindFrameInfo(cmd, uniform_view); |
| 155 | + |
| 156 | + return pass.AddCommand(cmd); |
| 157 | +} |
| 158 | + |
| 159 | +} // namespace impeller |
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