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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBitmap.h"
#include "SkColorPriv.h"
#include "SkCommandLineFlags.h"
#include "SkData.h"
#include "SkForceLinking.h"
#include "SkGraphics.h"
#include "SkImageDecoder.h"
#include "SkImageEncoder.h"
#include "SkOSFile.h"
#include "SkRandom.h"
#include "SkStream.h"
#include "SkTArray.h"
#include "SkTemplates.h"
__SK_FORCE_IMAGE_DECODER_LINKING;
DEFINE_string2(readPath, r, "", "Folder(s) and files to decode images. Required.");
struct Format {
SkImageEncoder::Type fType;
SkImageDecoder::Format fFormat;
const char* fSuffix;
};
/*
static const Format gFormats[] = {
{ SkImageEncoder::kBMP_Type, SkImageDecoder::kBMP_Format, ".bmp" },
{ SkImageEncoder::kGIF_Type, SkImageDecoder::kGIF_Format, ".gif" },
{ SkImageEncoder::kICO_Type, SkImageDecoder::kICO_Format, ".ico" },
{ SkImageEncoder::kJPEG_Type, SkImageDecoder::kJPEG_Format, ".jpg" },
{ SkImageEncoder::kPNG_Type, SkImageDecoder::kPNG_Format, ".png" },
{ SkImageEncoder::kWBMP_Type, SkImageDecoder::kWBMP_Format, ".wbmp" },
{ SkImageEncoder::kWEBP_Type, SkImageDecoder::kWEBP_Format, ".webp" }
};
*/
static SkISize opaqueSize(const SkBitmap& bm) {
int width = 1;
int height = 1;
for (int y = 0 ; y < bm.height(); y++) {
for (int x = 0 ; x < bm.width(); x++) {
SkColor color = bm.getColor(x, y);
if (SkColorGetA(color) != 0) {
height = y + 1;
width = width > (x + 1) ? width : x + 1;
}
}
}
return SkISize::Make(width, height);
}
static void setup_bitmap(SkBitmap* bitmap, int width, int height) {
bitmap->allocN32Pixels(width, height);
}
static bool write_bitmap(const char outName[], const SkBitmap& bm) {
SkISize size = opaqueSize(bm);
SkBitmap dst;
setup_bitmap(&dst, size.width(), size.height());
for (int y = 0 ; y < dst.height(); y++) {
for (int x = 0 ; x < dst.width(); x++) {
SkColor color = bm.getColor(x, y);
if (SkColorGetA(color) != 0xff) {
int a = SkColorGetA(color);
int r = SkColorGetR(color);
int g = SkColorGetG(color);
int b = SkColorGetB(color);
if (a == 0) {
r = g = b = 0;
} else {
r = (r * a) / 255;
g = (g * a) / 255;
b = (b * a) / 255;
a = 255;
}
color = SkColorSetARGB((U8CPU)a, (U8CPU)r, (U8CPU)g, (U8CPU)b);
}
*dst.getAddr32(x, y) = color;
}
}
return SkImageEncoder::EncodeFile(outName, dst, SkImageEncoder::kPNG_Type, 100);
}
static void decodeFileAndWrite(const char srcPath[]) {
SkBitmap bitmap;
SkFILEStream stream(srcPath);
if (!stream.isValid()) {
return;
}
SkImageDecoder* codec = SkImageDecoder::Factory(&stream);
if (NULL == codec) {
return;
}
SkAutoTDelete<SkImageDecoder> ad(codec);
stream.rewind();
if (!codec->decode(&stream, &bitmap, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode)) {
return;
}
write_bitmap(srcPath, bitmap);
}
/**
* Return true if the filename represents an image.
*/
static bool is_image_file(const char* filename) {
const char* gImageExtensions[] = {
".png", ".PNG", ".jpg", ".JPG", ".jpeg", ".JPEG", ".bmp", ".BMP",
".webp", ".WEBP", ".ico", ".ICO", ".wbmp", ".WBMP", ".gif", ".GIF"
};
for (size_t i = 0; i < SK_ARRAY_COUNT(gImageExtensions); ++i) {
if (SkStrEndsWith(filename, gImageExtensions[i])) {
return true;
}
}
return false;
}
int tool_main(int argc, char** argv);
int tool_main(int argc, char** argv) {
SkCommandLineFlags::SetUsage("Decode files, and optionally write the results to files.");
SkCommandLineFlags::Parse(argc, argv);
if (FLAGS_readPath.count() < 1) {
SkDebugf("Folder(s) or image(s) to decode are required.\n");
return -1;
}
SkAutoGraphics ag;
for (int i = 0; i < FLAGS_readPath.count(); i++) {
const char* readPath = FLAGS_readPath[i];
if (strlen(readPath) < 1) {
break;
}
if (sk_isdir(readPath)) {
const char* dir = readPath;
SkOSFile::Iter iter(dir);
SkString filename;
while (iter.next(&filename)) {
if (!is_image_file(filename.c_str())) {
continue;
}
SkString fullname = SkOSPath::Join(dir, filename.c_str());
decodeFileAndWrite(fullname.c_str());
}
} else if (sk_exists(readPath) && is_image_file(readPath)) {
decodeFileAndWrite(readPath);
}
}
return 0;
}
#if !defined SK_BUILD_FOR_IOS
int main(int argc, char * const argv[]) {
return tool_main(argc, (char**) argv);
}
#endif
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