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This commit is contained in:
Juan Linietsky
2015-05-31 01:59:42 -03:00
parent f62961aba3
commit d5348eebdc
30 changed files with 2485 additions and 28 deletions
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22
drivers/png/image_loader_png.cpp
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@@ -31,6 +31,8 @@
#include "print_string.h"
#include "os/os.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);
@@ -253,6 +255,7 @@ void ImageLoaderPNG::get_recognized_extensions(List<String> *p_extensions) const
struct PNGReadStatus {
int offset;
int size;
const unsigned char *image;
};
@@ -261,17 +264,26 @@ static void user_read_data(png_structp png_ptr,png_bytep data, png_size_t p_leng
PNGReadStatus *rstatus;
rstatus=(PNGReadStatus*)png_get_io_ptr(png_ptr);
memcpy(data,&rstatus->image[rstatus->offset],p_length);
rstatus->offset+=p_length;
int to_read=p_length;
if (rstatus->size>=0) {
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 Image _load_mem_png(const uint8_t* p_png) {
static 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;
Image img;
Error err = ImageLoaderPNG::_load_image(&prs,user_read_data,&img);
@@ -283,9 +295,10 @@ static Image _load_mem_png(const uint8_t* p_png) {
static Image _lossless_unpack_png(const DVector<uint8_t>& p_data) {
int len = p_data.size();
DVector<uint8_t>::Read r = p_data.read();
ERR_FAIL_COND_V(r[0]!='P' || r[1]!='N' || r[2]!='G' || r[3]!=' ',Image());
return _load_mem_png(&r[4]);
return _load_mem_png(&r[4],len-4);
}
@@ -424,6 +437,7 @@ static DVector<uint8_t> _lossless_pack_png(const Image& p_image) {
ImageLoaderPNG::ImageLoaderPNG() {
Image::_png_mem_loader_func=_load_mem_png;
Image::lossless_unpacker=_lossless_unpack_png;
Image::lossless_packer=_lossless_pack_png;