src/graphics/display/testing/image.h

// Copyright 2018 The Fuchsia 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 SRC_GRAPHICS_DISPLAY_TESTING_IMAGE_H_
#define SRC_GRAPHICS_DISPLAY_TESTING_IMAGE_H_

#include <fuchsia/hardware/display/llcpp/fidl.h>
#include <lib/zx/channel.h>
#include <lib/zx/event.h>
#include <zircon/pixelformat.h>
#include <zircon/types.h>

// Indicies into event and event_ids
#define WAIT_EVENT 0
#define SIGNAL_EVENT 1

namespace testing {
namespace display {

typedef struct image_import {
  uint64_t id;
  zx::event events[2];
  uint64_t event_ids[2];
} image_import_t;

class Image {
 public:
  enum class Pattern {
    kCheckerboard,
    kBorder,
  };

  static Image* Create(fidl::WireSyncClient<fuchsia_hardware_display::Controller>* dc,
                       uint32_t width, uint32_t height, zx_pixel_format_t format, Pattern pattern,
                       uint32_t fg_color, uint32_t bg_color, uint64_t modifier);

  void Render(int32_t prev_step, int32_t step_num);

  void* buffer() { return buf_; }
  uint32_t width() { return width_; }
  uint32_t height() { return height_; }
  uint32_t stride() { return stride_; }
  zx_pixel_format_t format() { return format_; }

  void GetConfig(fuchsia_hardware_display::wire::ImageConfig* config_out);
  bool Import(fidl::WireSyncClient<fuchsia_hardware_display::Controller>* dc,
              image_import_t* import_out);

 private:
  Image(uint32_t width, uint32_t height, int32_t stride, zx_pixel_format_t format,
        uint32_t collection_id, void* buf, Pattern pattern, uint32_t fg_color, uint32_t bg_color,
        uint64_t modifier);

  void RenderNv12(int32_t prev_step, int32_t step_num);

  // pixel_generator takes a width and a height and generates a uint32_t pixel color for it.
  template <typename T>
  void RenderLinear(T pixel_generator, uint32_t start_y, uint32_t end_y);
  template <typename T>
  void RenderTiled(T pixel_generator, uint32_t start_y, uint32_t end_y);

  uint32_t width_;
  uint32_t height_;
  uint32_t stride_;
  zx_pixel_format_t format_;

  uint32_t collection_id_;
  void* buf_;

  const Pattern pattern_;
  uint32_t fg_color_;
  uint32_t bg_color_;
  uint64_t modifier_;
};

}  // namespace display
}  // namespace testing

#endif  // SRC_GRAPHICS_DISPLAY_TESTING_IMAGE_H_