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//-----------------------------------------------------------------------------
// Name: image_export.cpp
// Developer: Wolfire Games LLC
// Author: Phillip Isola
// Description: Wraps up FreeImage library
// License: Read below
//-----------------------------------------------------------------------------
//
//
// Copyright 2022 Wolfire Games LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//-----------------------------------------------------------------------------
#include "image_export.hpp"
#include <Images/image_export.hpp>
#include <Images/freeimage_wrapper.h>
#include <Internal/error.h>
#include <Internal/filesystem.h>
#include <Internal/common.h>
#include <Compat/fileio.h>
#include <Compat/compat.h>
#include <Memory/allocation.h>
#include <Logging/logdata.h>
#include <FreeImage.h>
#include <crnlib.h>
#include <vector>
#include <cstring>
#include <algorithm>
#include <cstdio>
using std::min;
using std::max;
namespace {
void RGBAtoYCOCG(unsigned char *data, unsigned long width, unsigned long height) {
int index = 0;
for(unsigned i=0; i<width*height; i++){
const int r = data[index+2];
const int g = data[index+1];
const int b = data[index+0];
const int Co = r - b;
const int t = b + Co/2;
const int Cg = g - t;
const int Y = t + Cg/2;
data[index+2] = min(max(Co + 128, 0), 255);
data[index+1] = min(max(Cg + 128, 0), 255);
data[index+0] = 0;
data[index+3] = Y;
index+=4;
}
}
}
std::string ImageExport::FindEmptySequentialFile(const char* filename, const char* suffix) {
char abs_path[kPathSize];
for(int i=1; i<99999; i++){
FormatString(abs_path, kPathSize,"%s%s%05d%s", GetWritePath(CoreGameModID).c_str(), filename, i, suffix);
if(!CheckFileAccess(abs_path)) {
return abs_path;
}
}
return filename;
}
void ImageExport::ScaleImageUp(const unsigned char *data,
int levels,
unsigned long *width_ptr,
unsigned long *height_ptr,
std::vector<unsigned char> *new_data_ptr)
{
unsigned long& width = *width_ptr;
unsigned long& height = *height_ptr;
std::vector<unsigned char> &new_data = *new_data_ptr;
const int bytes_per_pixel = 4;
size_t image_size = width*height*bytes_per_pixel;
new_data.resize(image_size);
memcpy(&(new_data[0]), data, image_size);
for(int i=0; i<levels; i++){
width *= 2;
height *= 2;
image_size = width*height*bytes_per_pixel;
std::vector<unsigned char> new_new_data(image_size);
for(unsigned i=0; i<width; i++){
for(unsigned j=0; j<height; j++){
for(int k=0; k<bytes_per_pixel; k++){
new_new_data[(i+j*width)*bytes_per_pixel+k] = new_data[((i/2)+(j/2)*width/2)*bytes_per_pixel+k];
}
}
}
new_data = new_new_data;
}
}
void ImageExport::SavePNG(const char *file_path, unsigned char *data, unsigned long width, unsigned long height, unsigned short levels) {
std::vector<unsigned char> scaled_data;
ImageExport::ScaleImageUp(data, levels, &width, &height, &scaled_data);
FREE_IMAGE_FORMAT format = FIF_PNG;
FIBITMAP *image = FreeImage_ConvertFromRawBits(&scaled_data[0], width, height, 4*width, 32, 0xC0, 0x38, 0x7);
CreateParentDirs(file_path);
#ifdef _WIN32
createfile(file_path);
std::string short_path(file_path);
ShortenWindowsPath(short_path);
if(!FreeImage_Save(format, image, short_path.c_str())) {
DisplayError("Error","Problem exporting .png file");
}
#else
if(!FreeImage_Save(format, image, file_path)) {
DisplayError("Error","Problem exporting .png file");
}
#endif
FreeImage_Unload(image);
}
void ImageExport::SavePNGTransparent(const char *file_path, unsigned char *data, unsigned long width, unsigned long height, unsigned short levels) {
std::vector<unsigned char> scaled_data;
ImageExport::ScaleImageUp(data, levels, &width, &height, &scaled_data);
FREE_IMAGE_FORMAT format = FIF_PNG;
FIBITMAP *image = FreeImage_ConvertFromRawBits(&scaled_data[0], width, height, 4*width, 32, 0xC0, 0x38, 0x7);
LOGI << "BPP: " << (int)FreeImage_GetBPP(image) << std::endl;
LOGI << "IsTransparent: " << (int)FreeImage_IsTransparent(image) << std::endl;
FreeImage_SetTransparent(image, true);
LOGI << "IsTransparent: " << (int)FreeImage_IsTransparent(image) << std::endl;
int bytespp = FreeImage_GetLine(image) / FreeImage_GetWidth(image);
for(unsigned y = 0; y < FreeImage_GetHeight(image); y++) {
BYTE *bits = FreeImage_GetScanLine(image, y);
for(unsigned x = 0; x < FreeImage_GetWidth(image); x++) {
// Set pixel color to green with a transparency of 128
bits[FI_RGBA_RED] = min(255,(int)((bits[FI_RGBA_RED]/255.0f / (scaled_data[y*width*4+x*4+3]/255.0f))*255));
bits[FI_RGBA_GREEN] = min(255,(int)((bits[FI_RGBA_GREEN]/255.0f / (scaled_data[y*width*4+x*4+3]/255.0f))*255));
bits[FI_RGBA_BLUE] = min(255,(int)((bits[FI_RGBA_BLUE]/255.0f / (scaled_data[y*width*4+x*4+3]/255.0f))*255));
bits[FI_RGBA_ALPHA] = scaled_data[y*width*4+x*4+3];
// jump to next pixel
bits += bytespp;
}
}
CreateParentDirs(file_path);
#ifdef _WIN32
createfile(file_path);
std::string short_path(file_path);
ShortenWindowsPath(short_path);
if(!FreeImage_Save(format, image, short_path.c_str())) {
DisplayError("Error","Problem exporting .png file");
}
#else
if(!FreeImage_Save(format, image, file_path)) {
DisplayError("Error","Problem exporting .png file");
}
#endif
FreeImage_Unload(image);
}
void ImageExport::SaveJPEG(const char* abs_path, unsigned char *data, unsigned long width, unsigned long height) {
FREE_IMAGE_FORMAT format = FIF_JPEG;
FIBITMAP *image = FreeImage_ConvertFromRawBits(data, width, height, 3*width, 24, 0xC0, 0x38, 0x7);
CreateParentDirs(abs_path);
#ifdef _WIN32
createfile(abs_path);
std::string short_path(abs_path);
ShortenWindowsPath(short_path);
if(!FreeImage_Save(format, image, short_path.c_str(), JPEG_QUALITYSUPERB)) {
DisplayError("Error","Problem exporting .jpeg file");
}
#else
if(!FreeImage_Save(format, image, abs_path, JPEG_QUALITYSUPERB)) {
DisplayError("Error","Problem exporting .jpeg file");
}
#endif
FreeImage_Unload(image);
}
void ImageExport::SavePNGofGrayscaleFloats(const char *file_path, std::vector<float>& data, unsigned long width, unsigned long height) {
if (data.size() != width*height) return;
unsigned char* byte_data = (unsigned char*)(OG_MALLOC(sizeof(*byte_data)*data.size()*4));
for (unsigned i = 0; i < data.size(); i++) {
unsigned char data_i = (unsigned char)(data[i]*255);
byte_data[4*i] = data_i;
byte_data[4*i+1] = data_i;
byte_data[4*i+2] = data_i;
byte_data[4*i+3] = 255;
}
SavePNG(file_path, byte_data, width, height);
OG_FREE(byte_data);
}
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