blob: 0a33c3aba316f1a52ac236a8d1a207ea7d8b4e66 [file] [log] [blame]
// Copyright 2018 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "testing/utils/bitmap_saver.h"
#include <fstream>
#include <vector>
#include "core/fxcrt/check.h"
#include "core/fxcrt/fx_safe_types.h"
#include "testing/image_diff/image_diff_png.h"
// static
void BitmapSaver::WriteBitmapToPng(FPDF_BITMAP bitmap,
const std::string& filename) {
const int stride = FPDFBitmap_GetStride(bitmap);
const int width = FPDFBitmap_GetWidth(bitmap);
const int height = FPDFBitmap_GetHeight(bitmap);
CHECK(stride >= 0);
CHECK(width >= 0);
CHECK(height >= 0);
FX_SAFE_FILESIZE size = stride;
size *= height;
auto input = pdfium::make_span(
static_cast<const uint8_t*>(FPDFBitmap_GetBuffer(bitmap)),
pdfium::ValueOrDieForType<size_t>(size));
std::vector<uint8_t> png;
int format = FPDFBitmap_GetFormat(bitmap);
if (format == FPDFBitmap_Gray) {
png = image_diff_png::EncodeGrayPNG(input, width, height, stride);
} else if (format == FPDFBitmap_BGR) {
png = image_diff_png::EncodeBGRPNG(input, width, height, stride);
} else {
png = image_diff_png::EncodeBGRAPNG(input, width, height, stride,
/*discard_transparency=*/false);
}
DCHECK(!png.empty());
DCHECK(filename.size() < 256u);
std::ofstream png_file;
png_file.open(filename, std::ios_base::out | std::ios_base::binary);
png_file.write(reinterpret_cast<char*>(&png.front()), png.size());
DCHECK(png_file.good());
png_file.close();
}
// static
void BitmapSaver::WriteBitmapToPng(CFX_DIBitmap* bitmap,
const std::string& filename) {
WriteBitmapToPng(reinterpret_cast<FPDF_BITMAP>(bitmap), filename);
}