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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::max;
using std::min;
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;
}
}
} // namespace
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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