// Copyright 2017 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef COBALT_RENDERER_RASTERIZER_EGL_DRAW_RECT_COLOR_TEXTURE_H_
#define COBALT_RENDERER_RASTERIZER_EGL_DRAW_RECT_COLOR_TEXTURE_H_

#include "base/callback.h"
#include "cobalt/math/matrix3_f.h"
#include "cobalt/math/rect_f.h"
#include "cobalt/render_tree/color_rgba.h"
#include "cobalt/renderer/backend/egl/texture.h"
#include "cobalt/renderer/rasterizer/egl/draw_object.h"

namespace cobalt {
namespace renderer {
namespace rasterizer {
namespace egl {

// Handles drawing a textured rectangle modulated by a given color.
class DrawRectColorTexture : public DrawObject {
 public:
  DrawRectColorTexture(GraphicsState* graphics_state,
                       const BaseState& base_state,
                       const math::RectF& rect,
                       const render_tree::ColorRGBA& color,
                       const backend::TextureEGL* texture,
                       const math::Matrix3F& texcoord_transform,
                       bool clamp_texcoords);

  DrawRectColorTexture(GraphicsState* graphics_state,
                       const BaseState& base_state,
                       const math::RectF& rect,
                       const render_tree::ColorRGBA& color,
                       const backend::TextureEGL* texture,
                       const math::Matrix3F& texcoord_transform,
                       const base::Closure& draw_offscreen,
                       const base::Closure& draw_onscreen);

  void ExecuteOffscreenRasterize(GraphicsState* graphics_state,
      ShaderProgramManager* program_manager) OVERRIDE;
  void ExecuteOnscreenUpdateVertexBuffer(GraphicsState* graphics_state,
      ShaderProgramManager* program_manager) OVERRIDE;
  void ExecuteOnscreenRasterize(GraphicsState* graphics_state,
      ShaderProgramManager* program_manager) OVERRIDE;

 private:
  math::Matrix3F texcoord_transform_;
  math::RectF rect_;
  uint32_t color_;
  const backend::TextureEGL* texture_;
  base::Closure draw_offscreen_;
  base::Closure draw_onscreen_;

  uint8_t* vertex_buffer_;
  float texcoord_clamp_[4];   // texcoord clamping (min u, min v, max u, max v)
  bool clamp_texcoords_;
  bool tile_texture_;
};

}  // namespace egl
}  // namespace rasterizer
}  // namespace renderer
}  // namespace cobalt

#endif  // COBALT_RENDERER_RASTERIZER_EGL_DRAW_RECT_COLOR_TEXTURE_H_