glyph_atlas_context_stb.cc

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// 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.
 
#include "impeller/typographer/backends/stb/glyph_atlas_context_stb.h"
 
namespace impeller {
 
BitmapSTB::BitmapSTB() = default;
 
BitmapSTB::~BitmapSTB() = default;
 
BitmapSTB::BitmapSTB(size_t width, size_t height, size_t bytes_per_pixel)
    : width_(width),
      height_(height),
      bytes_per_pixel_(bytes_per_pixel),
      pixels_(std::vector<uint8_t>(width * height * bytes_per_pixel, 0)) {}
 
uint8_t* BitmapSTB::GetPixels() {
  return pixels_.data();
}
 
uint8_t* BitmapSTB::GetPixelAddress(TPoint<size_t> coords) {
  FML_DCHECK(coords.x < width_);
  FML_DCHECK(coords.x < height_);
 
  return &pixels_.data()[(coords.x + width_ * coords.y) * bytes_per_pixel_];
}
 
size_t BitmapSTB::GetRowBytes() const {
  return width_ * bytes_per_pixel_;
}
 
size_t BitmapSTB::GetWidth() const {
  return width_;
}
 
size_t BitmapSTB::GetHeight() const {
  return height_;
}
 
size_t BitmapSTB::GetSize() const {
  return width_ * height_ * bytes_per_pixel_;
}
 
GlyphAtlasContextSTB::GlyphAtlasContextSTB(GlyphAtlas::Type type)
    : GlyphAtlasContext(type) {}
 
GlyphAtlasContextSTB::~GlyphAtlasContextSTB() = default;
 
std::shared_ptr<BitmapSTB> GlyphAtlasContextSTB::GetBitmap() const {
  return bitmap_;
}
 
void GlyphAtlasContextSTB::UpdateBitmap(std::shared_ptr<BitmapSTB> bitmap) {
  bitmap_ = std::move(bitmap);
}
 
}  // namespace impeller