lib/gpu/fixtures.h

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef FLUTTER_LIB_GPU_FIXTURES_H_
#define FLUTTER_LIB_GPU_FIXTURES_H_

#include "impeller/core/shader_types.h"

struct FlutterGPUUnlitVertexShader {
  struct PerVertexData {
    impeller::Point position;  // (offset 0, size 8)
  };  // struct PerVertexData (size 8)

  static constexpr auto kInputPosition = impeller::ShaderStageIOSlot{
      // position
      "position",                    // name
      0u,                            // attribute location
      0u,                            // attribute set
      0u,                            // attribute binding
      impeller::ShaderType::kFloat,  // type
      32u,                           // bit width of type
      2u,                            // vec size
      1u,                            // number of columns
      0u,                            // offset for interleaved layout
  };

  static constexpr std::array<const impeller::ShaderStageIOSlot*, 1>
      kAllShaderStageInputs = {
          &kInputPosition,  // position
  };

  static constexpr auto kInterleavedLayout = impeller::ShaderStageBufferLayout{
      sizeof(PerVertexData),  // stride for interleaved layout
      0u,                     // attribute binding
  };
  static constexpr std::array<const impeller::ShaderStageBufferLayout*, 1>
      kInterleavedBufferLayout = {&kInterleavedLayout};
};

constexpr unsigned int kFlutterGPUUnlitVertIPLRLength = 856;
extern unsigned char kFlutterGPUUnlitVertIPLR[];

constexpr unsigned int kFlutterGPUUnlitFragIPLRLength = 556;
extern unsigned char kFlutterGPUUnlitFragIPLR[];

struct FlutterGPUTextureVertexShader {
  struct PerVertexData {
    impeller::Vector3 position;      // (offset 0, size 12)
    impeller::Point texture_coords;  // (offset 12, size 8)
    impeller::Vector4 color;         // (offset 20, size 16)
  };  // struct PerVertexData (size 36)

  static constexpr auto kInputTextureCoords = impeller::ShaderStageIOSlot{
      // texture_coords
      "texture_coords",              // name
      1u,                            // attribute location
      0u,                            // attribute set
      0u,                            // attribute binding
      impeller::ShaderType::kFloat,  // type
      32u,                           // bit width of type
      2u,                            // vec size
      1u,                            // number of columns
      12u,                           // offset for interleaved layout
  };

  static constexpr auto kInputColor = impeller::ShaderStageIOSlot{
      // color
      "color",                       // name
      2u,                            // attribute location
      0u,                            // attribute set
      0u,                            // attribute binding
      impeller::ShaderType::kFloat,  // type
      32u,                           // bit width of type
      4u,                            // vec size
      1u,                            // number of columns
      20u,                           // offset for interleaved layout
  };

  static constexpr auto kInputPosition = impeller::ShaderStageIOSlot{
      // position
      "position",                    // name
      0u,                            // attribute location
      0u,                            // attribute set
      0u,                            // attribute binding
      impeller::ShaderType::kFloat,  // type
      32u,                           // bit width of type
      3u,                            // vec size
      1u,                            // number of columns
      0u,                            // offset for interleaved layout
  };

  static constexpr std::array<const impeller::ShaderStageIOSlot*, 3>
      kAllShaderStageInputs = {
          &kInputTextureCoords,  // texture_coords
          &kInputColor,          // color
          &kInputPosition,       // position
  };

  static constexpr auto kInterleavedLayout = impeller::ShaderStageBufferLayout{
      sizeof(PerVertexData),  // stride for interleaved layout
      0u,                     // attribute binding
  };
  static constexpr std::array<const impeller::ShaderStageBufferLayout*, 1>
      kInterleavedBufferLayout = {&kInterleavedLayout};
};

constexpr unsigned int kFlutterGPUTextureVertIPLRLength = 920;
extern unsigned char kFlutterGPUTextureVertIPLR[];

constexpr unsigned int kFlutterGPUTextureFragIPLRLength = 800;
extern unsigned char kFlutterGPUTextureFragIPLR[];

#endif  // FLUTTER_LIB_GPU_FIXTURES_H_