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-rw-r--r--image/png.cpp16
-rw-r--r--image/png.h4
2 files changed, 13 insertions, 7 deletions
diff --git a/image/png.cpp b/image/png.cpp
index 37617a1690..e11f0459d2 100644
--- a/image/png.cpp
+++ b/image/png.cpp
@@ -39,7 +39,7 @@
namespace Image {
-PNGDecoder::PNGDecoder() : _outputSurface(0), _palette(0), _paletteColorCount(0) {
+PNGDecoder::PNGDecoder() : _outputSurface(0), _palette(0), _paletteColorCount(0), _skipSignature(false) {
}
PNGDecoder::~PNGDecoder() {
@@ -99,12 +99,14 @@ bool PNGDecoder::loadStream(Common::SeekableReadStream &stream) {
#ifdef USE_PNG
destroy();
- // First, check the PNG signature
- if (stream.readUint32BE() != MKTAG(0x89, 'P', 'N', 'G')) {
- return false;
- }
- if (stream.readUint32BE() != MKTAG(0x0d, 0x0a, 0x1a, 0x0a)) {
- return false;
+ // First, check the PNG signature (if not set to skip it)
+ if (!_skipSignature) {
+ if (stream.readUint32BE() != MKTAG(0x89, 'P', 'N', 'G')) {
+ return false;
+ }
+ if (stream.readUint32BE() != MKTAG(0x0d, 0x0a, 0x1a, 0x0a)) {
+ return false;
+ }
}
// The following is based on the guide provided in:
diff --git a/image/png.h b/image/png.h
index 7ecf68e76d..cdc3e3faf1 100644
--- a/image/png.h
+++ b/image/png.h
@@ -56,10 +56,14 @@ public:
const Graphics::Surface *getSurface() const { return _outputSurface; }
const byte *getPalette() const { return _palette; }
uint16 getPaletteColorCount() const { return _paletteColorCount; }
+ void setSkipSignature(bool skip) { _skipSignature = skip; }
private:
byte *_palette;
uint16 _paletteColorCount;
+ // flag to skip the png signature check for headless png files
+ bool _skipSignature;
+
Graphics::Surface *_outputSurface;
};