imports/ImHex-Patterns
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patterns: Added APNG support to PNG pattern (#53)

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This commit is contained in:
Fredrick Brennan
2022-11-10 04:36:46 -05:00
committed by GitHub
parent ff3c796de8
commit e7ea6fd77f
1 changed files with 36 additions and 10 deletions
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46
patterns/png.hexpat
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@@ -1,6 +1,5 @@
#pragma MIME image/png
#pragma endian big
#pragma pattern_limit 0
struct header_t {
u8 highBitByte;
@@ -88,6 +87,33 @@ fn text_len() {
return len;
};
enum BlendOp: u8 {
Source = 0x0,
Over
};
enum DisposeOp: u8 {
None = 0x0,
Background,
Previous
};
struct fctl_t {
u32 sequence_no [[comment("Sequence №")]];
u32 width [[comment("Frame width")]];
u32 height [[comment("Frame height")]];
u32 xoff;
u32 yoff;
u16 delay_num [[comment("Frame delay fraction numerator")]];
u16 delay_den [[comment("Frame delay fraction denominator")]];
DisposeOp dispose_op;
BlendOp blend_op;
};
struct fdat_t {
u32 sequence_no;
};
struct itxt_t {
char keyword[];
u8 compression_flag;
@@ -145,18 +171,20 @@ struct chunk_t {
sRGB srgb;
} else if (name == pHYs_k) {
phys_t phys;
} else if (name == acTL_k) {
actl_t actl;
} else if (name == fcTL_k) {
} else if (type == acTL_k) {
actl_t actl [[comment("Animation control chunk")]];
} else if (type == fcTL_k) {
fctl_t fctl [[comment("Frame control chunk")]];
} else if (name == iTXt_k) {
} else if (type == iTXt_k) {
itxt_t text;
} else if (type == gAMA_k) {
u32 gamma [[name("image gamma"), comment("4 byte unsigned integer representing gamma times 100000")]];
} else if (type == iCCP_k) {
iccp_t iccp;
} else if (name == tEXt_k) {
text_t text;
} else if (name == zTXt_k) {
ztxt_t text;
} else if (name == gAMA_k) {
u32 gamma [[name("image gamma"), comment("4 byte unsigned integer representing gamma times 100000")]];
} else if (name == iCCP_k) {
iccp_t iccp;
} else if (name == fdAT_k) {
@@ -180,6 +208,4 @@ struct chunk_set {
header_t header @ 0x00 [[comment("PNG file signature"), name("Signature")]];
chunk_t ihdr_chunk @ 0x08 [[comment("PNG Header chunk"), name("IHDR")]];
chunk_set set @ $ [[comment("PNG Chunks"), name("Chunks"), inline]];
chunk_t iend_chunk @ $ [[comment("Image End Chunk"), name("IEND")]];
// vim: syntax=rust
chunk_t iend_chunk @ $ [[comment("Image End Chunk"), name("IEND")]];