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/*
* Copyright (C) 2015-2015 Gregory hainaut
*
* This Program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This Program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Make; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
#include "stdafx.h"
#include "GSPng.h"
#include <zlib.h>
#include <png.h>
struct {
int type;
int bytes_per_pixel_in;
int bytes_per_pixel_out;
int channel_bit_depth;
const char *extension[2];
} static const pixel[GSPng::Format::COUNT] = {
{PNG_COLOR_TYPE_RGBA, 4, 4, 8 , {"_full.png", nullptr}}, // RGBA_PNG
{PNG_COLOR_TYPE_RGB , 4, 3, 8 , {".png", nullptr}}, // RGB_PNG
{PNG_COLOR_TYPE_RGB , 4, 3, 8 , {".png", "_alpha.png"}}, // RGB_A_PNG
{PNG_COLOR_TYPE_GRAY, 4, 1, 8 , {"_alpha.png", nullptr}}, // ALPHA_PNG
{PNG_COLOR_TYPE_GRAY, 1, 1, 8 , {"_R8I.png", nullptr}}, // R8I_PNG
{PNG_COLOR_TYPE_GRAY, 2, 2, 16, {"_R16I.png", nullptr}}, // R16I_PNG
{PNG_COLOR_TYPE_GRAY, 4, 2, 16, {"_R32I_lsb.png", "_R32I_msb.png"}}, // R32I_PNG
};
namespace GSPng {
bool SaveFile(const std::string& file, const Format fmt, const uint8* const image,
uint8* const row, const int width, const int height, const int pitch,
const int compression, const bool rb_swapped = false, const bool first_image = false)
{
const int channel_bit_depth = pixel[fmt].channel_bit_depth;
const int bytes_per_pixel_in = pixel[fmt].bytes_per_pixel_in;
const int type = first_image ? pixel[fmt].type : PNG_COLOR_TYPE_GRAY;
const int offset = first_image ? 0 : pixel[fmt].bytes_per_pixel_out;
const int bytes_per_pixel_out = first_image ? pixel[fmt].bytes_per_pixel_out : bytes_per_pixel_in - offset;
FILE *fp = px_fopen(file, "wb");
if (fp == nullptr)
return false;
png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
png_infop info_ptr = nullptr;
bool success;
try {
if (png_ptr == nullptr)
throw GSDXRecoverableError();
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == nullptr)
throw GSDXRecoverableError();
if (setjmp(png_jmpbuf(png_ptr)))
throw GSDXRecoverableError();
png_init_io(png_ptr, fp);
png_set_compression_level(png_ptr, compression);
png_set_IHDR(png_ptr, info_ptr, width, height, channel_bit_depth, type,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
png_write_info(png_ptr, info_ptr);
if (channel_bit_depth > 8)
png_set_swap(png_ptr);
if (rb_swapped && type != PNG_COLOR_TYPE_GRAY)
png_set_bgr(png_ptr);
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x)
for (int i = 0; i < bytes_per_pixel_out; ++i)
row[bytes_per_pixel_out * x + i] = image[y * pitch + bytes_per_pixel_in * x + i + offset];
png_write_row(png_ptr, row);
}
png_write_end(png_ptr, nullptr);
success = true;
} catch (GSDXRecoverableError&) {
fprintf(stderr, "Failed to write image %s\n", file.c_str());
success = false;
}
if (png_ptr)
png_destroy_write_struct(&png_ptr, info_ptr ? &info_ptr : nullptr);
fclose(fp);
return success;
}
bool Save(GSPng::Format fmt, const std::string& file, uint8* image, int w, int h, int pitch, int compression, bool rb_swapped)
{
std::string root = file;
root.replace(file.length() - 4, 4, "");
ASSERT(fmt >= Format::START && fmt < Format::COUNT);
if (compression < 0 || compression > Z_BEST_COMPRESSION)
compression = Z_BEST_SPEED;
std::unique_ptr<uint8[]> row(new uint8[pixel[fmt].bytes_per_pixel_out * w]);
std::string filename = root + pixel[fmt].extension[0];
if (!SaveFile(filename, fmt, image, row.get(), w, h, pitch, compression, rb_swapped, true))
return false;
// Second image
if (pixel[fmt].extension[1] == nullptr)
return true;
filename = root + pixel[fmt].extension[1];
return SaveFile(filename, fmt, image, row.get(), w, h, pitch, compression);
}
Transaction::Transaction(GSPng::Format fmt, const std::string& file, const uint8* image, int w, int h, int pitch, int compression)
: m_fmt(fmt), m_file(file), m_w(w), m_h(h), m_pitch(pitch), m_compression(compression)
{
// Note: yes it would be better to use shared pointer
m_image = (uint8*)_aligned_malloc(pitch*h, 32);
if (m_image)
memcpy(m_image, image, pitch*h);
}
Transaction::~Transaction()
{
if (m_image)
_aligned_free(m_image);
}
void Process(std::shared_ptr<Transaction>& item)
{
Save(item->m_fmt, item->m_file, item->m_image, item->m_w, item->m_h, item->m_pitch, item->m_compression);
}
}
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