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-rw-r--r--hl/tools/gif2h5/decompress.c176
1 files changed, 87 insertions, 89 deletions
diff --git a/hl/tools/gif2h5/decompress.c b/hl/tools/gif2h5/decompress.c
index 129fa60..710d29f 100644
--- a/hl/tools/gif2h5/decompress.c
+++ b/hl/tools/gif2h5/decompress.c
@@ -15,45 +15,43 @@
#include "gif.h"
-GIFWORD iWIDE, iHIGH, eWIDE, eHIGH, expand, numcols, strip, nostrip;
-unsigned long cols[256];
-char *cmd;
+GIFWORD iWIDE, iHIGH, eWIDE, eHIGH, expand, numcols, strip, nostrip;
+unsigned long cols[256];
+char * cmd;
FILE *fp;
-static GIFWORD
- XC = 0, YC = 0, /* Output X and Y coords of current pixel */
- InitCodeSize, /* Starting code size, used during Clear */
- CodeSize, /* Code size, read from GIF header */
- BytesPerScanline, /* Bytes per scanline in output raster */
- IWidth, IHeight; /* image dimensions */
-static int
- BitOffset = 0, /* Bit Offset of next code */
- Pass = 0, /* Used by output routine if GIFWORDerlaced pic */
- OutCount = 0, /* Decompressor output 'stack count' */
- Code, /* Value returned by ReadCode */
- MaxCode, /* limiting value for current code size */
- ClearCode, /* GIF clear code */
- EOFCode, /* GIF end-of-information code */
- CurCode, OldCode, InCode, /* Decompressor variables */
- FirstFree, /* First free code, generated per GIF spec */
- FreeCode, /* Decompressor, next free slot in hash table */
- FinChar, /* Decompressor variable */
- DataMask, /* AND mask for data size */
- ReadMask; /* Code AND mask for current code size */
+static GIFWORD XC = 0, YC = 0, /* Output X and Y coords of current pixel */
+ InitCodeSize, /* Starting code size, used during Clear */
+ CodeSize, /* Code size, read from GIF header */
+ BytesPerScanline, /* Bytes per scanline in output raster */
+ IWidth, IHeight; /* image dimensions */
+static int BitOffset = 0, /* Bit Offset of next code */
+ Pass = 0, /* Used by output routine if GIFWORDerlaced pic */
+ OutCount = 0, /* Decompressor output 'stack count' */
+ Code, /* Value returned by ReadCode */
+ MaxCode, /* limiting value for current code size */
+ ClearCode, /* GIF clear code */
+ EOFCode, /* GIF end-of-information code */
+ CurCode, OldCode, InCode, /* Decompressor variables */
+ FirstFree, /* First free code, generated per GIF spec */
+ FreeCode, /* Decompressor, next free slot in hash table */
+ FinChar, /* Decompressor variable */
+ DataMask, /* AND mask for data size */
+ ReadMask; /* Code AND mask for current code size */
/*MODIFICATIONS*/
-GIFBYTE tempbyte[10];
-GIFBYTE * tempGIFBYTEptr[10];
-GIFWORD tempint[10];
-GIFWORD ImageCount = 0;
+GIFBYTE tempbyte[10];
+GIFBYTE *tempGIFBYTEptr[10];
+GIFWORD tempint[10];
+GIFWORD ImageCount = 0;
/*END MODIFICATION*/
boolean Interlace, HasColormap;
-GIFBYTE *Image; /* The result array */
-GIFBYTE *RawGIF; /* The heap array to hold it, raw */
-GIFBYTE *Raster; /* The raster data stream, unblocked */
+GIFBYTE *Image; /* The result array */
+GIFBYTE *RawGIF; /* The heap array to hold it, raw */
+GIFBYTE *Raster; /* The raster data stream, unblocked */
/* The hash table used by the decompressor */
@@ -66,7 +64,7 @@ int *OutCode;
/* The color map, read from the GIF header */
-int numused;
+int numused;
/*
* Fetch the next code from the raster data stream. The codes can be any
@@ -82,7 +80,7 @@ ReadCode(void)
int RawCode, ByteOffset;
ByteOffset = BitOffset / 8;
- RawCode = Raster[ByteOffset] + (0x100 * Raster[ByteOffset + 1]);
+ RawCode = Raster[ByteOffset] + (0x100 * Raster[ByteOffset + 1]);
if (CodeSize >= 8)
RawCode += (0x10000 * Raster[ByteOffset + 2]);
@@ -95,10 +93,8 @@ ReadCode(void)
static void
AddToPixel(GIFBYTE Index)
{
- if (YC<IHeight)
- *(Image + YC * BytesPerScanline + XC) = Index;
-
-
+ if (YC < IHeight)
+ *(Image + YC * BytesPerScanline + XC) = Index;
/* Update the X-coordinate, and if it overflows, update the
* Y-coordinate */
@@ -113,40 +109,41 @@ AddToPixel(GIFBYTE Index)
if (!Interlace) {
YC++;
- } else {
+ }
+ else {
switch (Pass) {
- case 0:
- YC += 8;
-
- if (YC >= IHeight) {
- Pass++;
- YC = 4;
- }
-
- break;
- case 1:
- YC += 8;
-
- if (YC >= IHeight) {
- Pass++;
- YC = 2;
- }
-
- break;
- case 2:
- YC += 4;
-
- if (YC >= IHeight) {
- Pass++;
- YC = 1;
- }
-
- break;
- case 3:
- YC += 2;
- break;
- default:
- break;
+ case 0:
+ YC += 8;
+
+ if (YC >= IHeight) {
+ Pass++;
+ YC = 4;
+ }
+
+ break;
+ case 1:
+ YC += 8;
+
+ if (YC >= IHeight) {
+ Pass++;
+ YC = 2;
+ }
+
+ break;
+ case 2:
+ YC += 4;
+
+ if (YC >= IHeight) {
+ Pass++;
+ YC = 1;
+ }
+
+ break;
+ case 3:
+ YC += 2;
+ break;
+ default:
+ break;
}
}
}
@@ -172,20 +169,20 @@ Decompress(GIFIMAGEDESC *GifImageDesc, GIFHEAD *GifHead)
exit(EXIT_FAILURE);
}
- XC = 0;
- YC = 0;
- Pass = 0;
- OutCount = 0;
+ XC = 0;
+ YC = 0;
+ Pass = 0;
+ OutCount = 0;
BitOffset = 0;
- DataMask = (1 << ((GifHead->PackedField & 0x07) +1)) -1;
- Raster = GifImageDesc->GIFImage;
+ DataMask = (1 << ((GifHead->PackedField & 0x07) + 1)) - 1;
+ Raster = GifImageDesc->GIFImage;
/* Check for image seperator */
/* Now read in values from the image descriptor */
- IWidth = GifImageDesc->ImageWidth;
- IHeight = GifImageDesc->ImageHeight;
+ IWidth = GifImageDesc->ImageWidth;
+ IHeight = GifImageDesc->ImageHeight;
Interlace = (uint8_t)(GifImageDesc->PackedField & 0x40);
/*
@@ -200,9 +197,9 @@ Decompress(GIFIMAGEDESC *GifImageDesc, GIFHEAD *GifHead)
* compute decompressor constant values, based on this code size.
*/
- CodeSize = GifImageDesc->CodeSize;
+ CodeSize = GifImageDesc->CodeSize;
ClearCode = (1 << CodeSize);
- EOFCode = ClearCode + 1;
+ EOFCode = ClearCode + 1;
FreeCode = FirstFree = ClearCode + 2;
/*
@@ -214,8 +211,8 @@ Decompress(GIFIMAGEDESC *GifImageDesc, GIFHEAD *GifHead)
CodeSize++;
InitCodeSize = CodeSize;
- MaxCode = (1 << CodeSize);
- ReadMask = MaxCode - 1;
+ MaxCode = (1 << CodeSize);
+ ReadMask = MaxCode - 1;
/*
* Read the raster data. Here we just transpose it from the GIF array to
@@ -225,7 +222,7 @@ Decompress(GIFIMAGEDESC *GifImageDesc, GIFHEAD *GifHead)
/* Allocate the Image */
- if (!(Image = (GIFBYTE *)malloc((size_t)IWidth*(size_t)IHeight))) {
+ if (!(Image = (GIFBYTE *)malloc((size_t)IWidth * (size_t)IHeight))) {
printf("Out of memory");
exit(EXIT_FAILURE);
}
@@ -246,13 +243,14 @@ Decompress(GIFIMAGEDESC *GifImageDesc, GIFHEAD *GifHead)
*/
if (Code == ClearCode) {
CodeSize = InitCodeSize;
- MaxCode = (1 << CodeSize);
+ MaxCode = (1 << CodeSize);
ReadMask = MaxCode - 1;
FreeCode = FirstFree;
CurCode = OldCode = Code = ReadCode();
- FinChar = CurCode & DataMask;
+ FinChar = CurCode & DataMask;
AddToPixel((GIFBYTE)FinChar);
- } else {
+ }
+ else {
/*
* If not a clear code, then must be data: save same as CurCode
* and InCode
@@ -264,7 +262,7 @@ Decompress(GIFIMAGEDESC *GifImageDesc, GIFHEAD *GifHead)
* repeat the last character decoded
*/
if (CurCode >= FreeCode) {
- CurCode = OldCode;
+ CurCode = OldCode;
OutCode[OutCount++] = FinChar;
}
@@ -279,11 +277,11 @@ Decompress(GIFIMAGEDESC *GifImageDesc, GIFHEAD *GifHead)
}
OutCode[OutCount++] = Suffix[CurCode];
- CurCode = Prefix[CurCode];
+ CurCode = Prefix[CurCode];
}
/* The last code in the chain is treated as raw data. */
- FinChar = CurCode & DataMask;
+ FinChar = CurCode & DataMask;
OutCode[OutCount++] = FinChar;
/*
@@ -301,7 +299,7 @@ Decompress(GIFIMAGEDESC *GifImageDesc, GIFHEAD *GifHead)
*/
Prefix[FreeCode] = OldCode;
Suffix[FreeCode] = FinChar;
- OldCode = InCode;
+ OldCode = InCode;
/*
* Point to the next slot in the table. If we exceed the current
generated by cgit v0.12 at 2024-07-22 06:08:23 (GMT)