sheet_image_import.h

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#ifndef YAZE_APP_EDITOR_GRAPHICS_SHEET_IMAGE_IMPORT_H
#define YAZE_APP_EDITOR_GRAPHICS_SHEET_IMAGE_IMPORT_H
 
#include <array>
#include <cstdint>
#include <string>
#include <string_view>
#include <vector>
 
#include "absl/status/statusor.h"
#include "util/indexed_png.h"
 
namespace yaze::editor {
 
enum class ImportedImageSource {
  kIndexedPng,    // indices and PLTE order taken from the file
  kPaletteStrip,  // RGB pixels matched exactly against a palette strip
};
 
struct ImportedSheetImage {
  int width = 0;
  int height = 0;                // art only, without the palette strip
  std::vector<uint8_t> indices;  // width * height, row-major
  // Index order. For a palette strip, the strip's colors; for an indexed PNG,
  // its PLTE (with tRNS alpha).
  std::vector<std::array<uint8_t, 4>> palette;
  ImportedImageSource source = ImportedImageSource::kIndexedPng;
  bool strip_removed = false;
  int max_index = 0;  // highest index the art uses
};
 
absl::StatusOr<ImportedSheetImage> ImportSheetImage(const util::PngImage& png);
 
absl::StatusOr<ImportedSheetImage> ImportSheetImagePng(
    const std::vector<uint8_t>& png_bytes);
 
absl::StatusOr<std::vector<uint8_t>> EncodeImportedSheetTiles(
    const ImportedSheetImage& image, int bpp);
 
absl::StatusOr<std::vector<uint8_t>> EncodeImportedSheetPng(
    const ImportedSheetImage& image);
 
std::string DescribeImportedSheetImage(const ImportedSheetImage& image);
 
absl::StatusOr<std::vector<int>> PreviewPaletteSlots(
    std::string_view group_name, size_t palette_size, int row, int count);
 
}  // namespace yaze::editor
 
#endif  // YAZE_APP_EDITOR_GRAPHICS_SHEET_IMAGE_IMPORT_H