392 lines
10 KiB
C++
392 lines
10 KiB
C++
/*************************************************************************/
|
|
/* image_loader_png.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
|
|
#include "image_loader_png.h"
|
|
|
|
#include "core/os/os.h"
|
|
#include "core/print_string.h"
|
|
|
|
#include <string.h>
|
|
|
|
void ImageLoaderPNG::_read_png_data(png_structp png_ptr, png_bytep data, png_size_t p_length) {
|
|
|
|
FileAccess *f = (FileAccess *)png_get_io_ptr(png_ptr);
|
|
f->get_buffer((uint8_t *)data, p_length);
|
|
}
|
|
|
|
/*
|
|
png_structp png_ptr = png_create_read_struct_2
|
|
(PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
|
|
user_error_fn, user_warning_fn, (png_voidp)
|
|
user_mem_ptr, user_malloc_fn, user_free_fn);
|
|
*/
|
|
static png_voidp _png_malloc_fn(png_structp png_ptr, png_size_t size) {
|
|
|
|
return memalloc(size);
|
|
}
|
|
|
|
static void _png_free_fn(png_structp png_ptr, png_voidp ptr) {
|
|
|
|
memfree(ptr);
|
|
}
|
|
|
|
static void _png_error_function(png_structp, png_const_charp text) {
|
|
|
|
ERR_PRINT(text);
|
|
}
|
|
|
|
static void _png_warn_function(png_structp, png_const_charp text) {
|
|
|
|
WARN_PRINT(text);
|
|
}
|
|
|
|
typedef void(PNGAPI *png_error_ptr) PNGARG((png_structp, png_const_charp));
|
|
|
|
Error ImageLoaderPNG::_load_image(void *rf_up, png_rw_ptr p_func, Ref<Image> p_image) {
|
|
|
|
png_structp png;
|
|
png_infop info;
|
|
|
|
//png = png_create_read_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, NULL, NULL);
|
|
|
|
png = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, _png_error_function, _png_warn_function, (png_voidp)NULL,
|
|
_png_malloc_fn, _png_free_fn);
|
|
|
|
ERR_FAIL_COND_V(!png, ERR_OUT_OF_MEMORY);
|
|
|
|
info = png_create_info_struct(png);
|
|
if (!info) {
|
|
png_destroy_read_struct(&png, NULL, NULL);
|
|
ERR_PRINT("Out of Memory");
|
|
return ERR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
if (setjmp(png_jmpbuf(png))) {
|
|
|
|
png_destroy_read_struct(&png, NULL, NULL);
|
|
ERR_PRINT("PNG Corrupted");
|
|
return ERR_FILE_CORRUPT;
|
|
}
|
|
|
|
png_set_read_fn(png, (void *)rf_up, p_func);
|
|
|
|
png_uint_32 width, height;
|
|
int depth, color;
|
|
|
|
png_read_info(png, info);
|
|
png_get_IHDR(png, info, &width, &height, &depth, &color, NULL, NULL, NULL);
|
|
|
|
//https://svn.gov.pt/projects/ccidadao/repository/middleware-offline/trunk/_src/eidmw/FreeImagePTEiD/Source/FreeImage/PluginPNG.cpp
|
|
//png_get_text(png,info,)
|
|
/*
|
|
printf("Image width:%i\n", width);
|
|
printf("Image Height:%i\n", height);
|
|
printf("Bit depth:%i\n", depth);
|
|
printf("Color type:%i\n", color);
|
|
*/
|
|
|
|
bool update_info = false;
|
|
|
|
if (depth < 8) { //only bit dept 8 per channel is handled
|
|
|
|
png_set_packing(png);
|
|
update_info = true;
|
|
};
|
|
|
|
if (png_get_color_type(png, info) == PNG_COLOR_TYPE_PALETTE) {
|
|
png_set_palette_to_rgb(png);
|
|
update_info = true;
|
|
}
|
|
|
|
if (depth > 8) {
|
|
png_set_strip_16(png);
|
|
update_info = true;
|
|
}
|
|
|
|
if (png_get_valid(png, info, PNG_INFO_tRNS)) {
|
|
//png_set_expand_gray_1_2_4_to_8(png);
|
|
png_set_tRNS_to_alpha(png);
|
|
update_info = true;
|
|
}
|
|
|
|
if (update_info) {
|
|
png_read_update_info(png, info);
|
|
png_get_IHDR(png, info, &width, &height, &depth, &color, NULL, NULL, NULL);
|
|
}
|
|
|
|
int components = 0;
|
|
|
|
Image::Format fmt;
|
|
switch (color) {
|
|
|
|
case PNG_COLOR_TYPE_GRAY: {
|
|
|
|
fmt = Image::FORMAT_L8;
|
|
components = 1;
|
|
} break;
|
|
case PNG_COLOR_TYPE_GRAY_ALPHA: {
|
|
|
|
fmt = Image::FORMAT_LA8;
|
|
components = 2;
|
|
} break;
|
|
case PNG_COLOR_TYPE_RGB: {
|
|
|
|
fmt = Image::FORMAT_RGB8;
|
|
components = 3;
|
|
} break;
|
|
case PNG_COLOR_TYPE_RGB_ALPHA: {
|
|
|
|
fmt = Image::FORMAT_RGBA8;
|
|
components = 4;
|
|
} break;
|
|
default: {
|
|
|
|
ERR_PRINT("INVALID PNG TYPE");
|
|
png_destroy_read_struct(&png, &info, NULL);
|
|
return ERR_UNAVAILABLE;
|
|
} break;
|
|
}
|
|
|
|
//int rowsize = png_get_rowbytes(png, info);
|
|
int rowsize = components * width;
|
|
|
|
PoolVector<uint8_t> dstbuff;
|
|
|
|
dstbuff.resize(rowsize * height);
|
|
|
|
PoolVector<uint8_t>::Write dstbuff_write = dstbuff.write();
|
|
|
|
uint8_t *data = dstbuff_write.ptr();
|
|
|
|
uint8_t **row_p = memnew_arr(uint8_t *, height);
|
|
|
|
for (unsigned int i = 0; i < height; i++) {
|
|
row_p[i] = &data[components * width * i];
|
|
}
|
|
|
|
png_read_image(png, (png_bytep *)row_p);
|
|
|
|
memdelete_arr(row_p);
|
|
|
|
p_image->create(width, height, 0, fmt, dstbuff);
|
|
|
|
png_destroy_read_struct(&png, &info, NULL);
|
|
|
|
return OK;
|
|
}
|
|
|
|
Error ImageLoaderPNG::load_image(Ref<Image> p_image, FileAccess *f, bool p_force_linear, float p_scale) {
|
|
|
|
Error err = _load_image(f, _read_png_data, p_image);
|
|
f->close();
|
|
|
|
return err;
|
|
}
|
|
|
|
void ImageLoaderPNG::get_recognized_extensions(List<String> *p_extensions) const {
|
|
|
|
p_extensions->push_back("png");
|
|
}
|
|
|
|
struct PNGReadStatus {
|
|
|
|
uint32_t offset;
|
|
uint32_t size;
|
|
const unsigned char *image;
|
|
};
|
|
|
|
static void user_read_data(png_structp png_ptr, png_bytep data, png_size_t p_length) {
|
|
|
|
PNGReadStatus *rstatus;
|
|
rstatus = (PNGReadStatus *)png_get_io_ptr(png_ptr);
|
|
|
|
png_size_t to_read = MIN(p_length, rstatus->size - rstatus->offset);
|
|
memcpy(data, &rstatus->image[rstatus->offset], to_read);
|
|
rstatus->offset += to_read;
|
|
|
|
if (to_read < p_length) {
|
|
memset(&data[to_read], 0, p_length - to_read);
|
|
}
|
|
}
|
|
|
|
static Ref<Image> _load_mem_png(const uint8_t *p_png, int p_size) {
|
|
|
|
PNGReadStatus prs;
|
|
prs.image = p_png;
|
|
prs.offset = 0;
|
|
prs.size = p_size;
|
|
|
|
Ref<Image> img;
|
|
img.instance();
|
|
Error err = ImageLoaderPNG::_load_image(&prs, user_read_data, img);
|
|
ERR_FAIL_COND_V(err, Ref<Image>());
|
|
|
|
return img;
|
|
}
|
|
|
|
static Ref<Image> _lossless_unpack_png(const PoolVector<uint8_t> &p_data) {
|
|
|
|
int len = p_data.size();
|
|
ERR_FAIL_COND_V(len < 4, Ref<Image>());
|
|
PoolVector<uint8_t>::Read r = p_data.read();
|
|
ERR_FAIL_COND_V(r[0] != 'P' || r[1] != 'N' || r[2] != 'G' || r[3] != ' ', Ref<Image>());
|
|
return _load_mem_png(&r[4], len - 4);
|
|
}
|
|
|
|
static void _write_png_data(png_structp png_ptr, png_bytep data, png_size_t p_length) {
|
|
|
|
PoolVector<uint8_t> &v = *(PoolVector<uint8_t> *)png_get_io_ptr(png_ptr);
|
|
int vs = v.size();
|
|
|
|
v.resize(vs + p_length);
|
|
PoolVector<uint8_t>::Write w = v.write();
|
|
copymem(&w[vs], data, p_length);
|
|
}
|
|
|
|
static PoolVector<uint8_t> _lossless_pack_png(const Ref<Image> &p_image) {
|
|
|
|
Ref<Image> img = p_image->duplicate();
|
|
|
|
if (img->is_compressed())
|
|
img->decompress();
|
|
|
|
ERR_FAIL_COND_V(img->is_compressed(), PoolVector<uint8_t>());
|
|
|
|
png_structp png_ptr;
|
|
png_infop info_ptr;
|
|
png_bytep *row_pointers;
|
|
|
|
/* initialize stuff */
|
|
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
|
|
|
|
ERR_FAIL_COND_V(!png_ptr, PoolVector<uint8_t>());
|
|
|
|
info_ptr = png_create_info_struct(png_ptr);
|
|
|
|
ERR_FAIL_COND_V(!info_ptr, PoolVector<uint8_t>());
|
|
|
|
if (setjmp(png_jmpbuf(png_ptr))) {
|
|
ERR_FAIL_V(PoolVector<uint8_t>());
|
|
}
|
|
PoolVector<uint8_t> ret;
|
|
ret.push_back('P');
|
|
ret.push_back('N');
|
|
ret.push_back('G');
|
|
ret.push_back(' ');
|
|
|
|
png_set_write_fn(png_ptr, &ret, _write_png_data, NULL);
|
|
|
|
/* write header */
|
|
if (setjmp(png_jmpbuf(png_ptr))) {
|
|
ERR_FAIL_V(PoolVector<uint8_t>());
|
|
}
|
|
|
|
int pngf = 0;
|
|
int cs = 0;
|
|
|
|
switch (img->get_format()) {
|
|
|
|
case Image::FORMAT_L8: {
|
|
|
|
pngf = PNG_COLOR_TYPE_GRAY;
|
|
cs = 1;
|
|
} break;
|
|
case Image::FORMAT_LA8: {
|
|
|
|
pngf = PNG_COLOR_TYPE_GRAY_ALPHA;
|
|
cs = 2;
|
|
} break;
|
|
case Image::FORMAT_RGB8: {
|
|
|
|
pngf = PNG_COLOR_TYPE_RGB;
|
|
cs = 3;
|
|
} break;
|
|
case Image::FORMAT_RGBA8: {
|
|
|
|
pngf = PNG_COLOR_TYPE_RGB_ALPHA;
|
|
cs = 4;
|
|
} break;
|
|
default: {
|
|
|
|
if (img->detect_alpha()) {
|
|
|
|
img->convert(Image::FORMAT_RGBA8);
|
|
pngf = PNG_COLOR_TYPE_RGB_ALPHA;
|
|
cs = 4;
|
|
} else {
|
|
|
|
img->convert(Image::FORMAT_RGB8);
|
|
pngf = PNG_COLOR_TYPE_RGB;
|
|
cs = 3;
|
|
}
|
|
}
|
|
}
|
|
|
|
int w = img->get_width();
|
|
int h = img->get_height();
|
|
png_set_IHDR(png_ptr, info_ptr, w, h,
|
|
8, pngf, PNG_INTERLACE_NONE,
|
|
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
|
|
|
|
png_write_info(png_ptr, info_ptr);
|
|
|
|
/* write bytes */
|
|
if (setjmp(png_jmpbuf(png_ptr))) {
|
|
ERR_FAIL_V(PoolVector<uint8_t>());
|
|
}
|
|
|
|
PoolVector<uint8_t>::Read r = img->get_data().read();
|
|
|
|
row_pointers = (png_bytep *)memalloc(sizeof(png_bytep) * h);
|
|
for (int i = 0; i < h; i++) {
|
|
|
|
row_pointers[i] = (png_bytep)&r[i * w * cs];
|
|
}
|
|
png_write_image(png_ptr, row_pointers);
|
|
|
|
memfree(row_pointers);
|
|
|
|
/* end write */
|
|
if (setjmp(png_jmpbuf(png_ptr))) {
|
|
|
|
ERR_FAIL_V(PoolVector<uint8_t>());
|
|
}
|
|
|
|
png_write_end(png_ptr, NULL);
|
|
|
|
return ret;
|
|
}
|
|
|
|
ImageLoaderPNG::ImageLoaderPNG() {
|
|
|
|
Image::_png_mem_loader_func = _load_mem_png;
|
|
Image::lossless_unpacker = _lossless_unpack_png;
|
|
Image::lossless_packer = _lossless_pack_png;
|
|
}
|