mirror of
https://github.com/zint/zint
synced 2024-11-16 20:57:25 +13:00
- raster/BMP/GIF/PCX/TIF: fix dealing with very large data (use
`size_t` as appropriate) - BMP: lessen heap memory usage by only `malloc()`ing a row, not whole file - GIF: lessen heap memory usage by paging (also simplifies some function returns); use standard colour char map - raster: add `raster_malloc()` to fail > 1GB (avoids very large output files that most systems can't handle; also lessens to some degree chances of being victim of OOM killer on Linux) - GUI: printing scale dialog: set maxima on X-dim and resolution to keep scale <= 200
This commit is contained in:
gitlost
375
backend/gif.c
375
backend/gif.c
@ -43,47 +43,35 @@
|
||||
#define GIF_LZW_PAGE_SIZE 0x100000 /* Megabyte */
|
||||
|
||||
typedef struct s_statestruct {
|
||||
FILE *file;
|
||||
unsigned char *pOut;
|
||||
const unsigned char *pIn;
|
||||
unsigned int InLen;
|
||||
unsigned int OutLength;
|
||||
unsigned int OutPosCur;
|
||||
unsigned int OutByteCountPos;
|
||||
const unsigned char *pInEnd;
|
||||
size_t OutLength;
|
||||
size_t OutPosCur;
|
||||
size_t OutByteCountPos;
|
||||
unsigned short ClearCode;
|
||||
unsigned short FreeCode;
|
||||
char fByteCountByteSet;
|
||||
char fOutPaged;
|
||||
unsigned char OutBitsFree;
|
||||
unsigned short NodeAxon[4096];
|
||||
unsigned short NodeNext[4096];
|
||||
unsigned char NodePix[4096];
|
||||
unsigned char colourCode[10];
|
||||
unsigned char colourPaletteIndex[10];
|
||||
int colourCount;
|
||||
unsigned char map[256];
|
||||
} statestruct;
|
||||
|
||||
/* Transform a Pixel to a lzw colourmap index and move to next pixel.
|
||||
* All colour values are listed in colourCode with corresponding palette index
|
||||
*/
|
||||
static unsigned char NextPaletteIndex(statestruct *pState)
|
||||
{
|
||||
unsigned char pixelColour;
|
||||
int colourIndex;
|
||||
pixelColour = *(pState->pIn);
|
||||
(pState->pIn)++;
|
||||
(pState->InLen)--;
|
||||
for (colourIndex = 0; colourIndex < pState->colourCount; colourIndex++) {
|
||||
if (pixelColour == pState->colourCode[colourIndex])
|
||||
return pState->colourPaletteIndex[colourIndex];
|
||||
|
||||
}
|
||||
return 0; /* Not reached */
|
||||
}
|
||||
|
||||
|
||||
static int BufferNextByte(statestruct *pState) {
|
||||
static void BufferNextByte(statestruct *pState) {
|
||||
(pState->OutPosCur)++;
|
||||
if (pState->fOutPaged && pState->OutPosCur + 2 >= pState->OutLength) {
|
||||
/* Keep last 256 bytes so `OutByteCountPos` within range */
|
||||
fwrite(pState->pOut, 1, pState->OutPosCur - 256, pState->file);
|
||||
memmove(pState->pOut, pState->pOut + pState->OutPosCur - 256, 256);
|
||||
pState->OutByteCountPos -= pState->OutPosCur - 256;
|
||||
pState->OutPosCur = 256;
|
||||
}
|
||||
/* Check if this position is a byte count position
|
||||
* fg_f_bytecountbyte_set indicates, if byte count position bytes should be
|
||||
* `fByteCountByteSet` indicates, if byte count position bytes should be
|
||||
* inserted in general.
|
||||
* If this is true, and the distance to the last byte count position is 256
|
||||
* (e.g. 255 bytes in between), a byte count byte is inserted, and the value
|
||||
@ -94,34 +82,22 @@ static int BufferNextByte(statestruct *pState) {
|
||||
pState->OutByteCountPos = pState->OutPosCur;
|
||||
(pState->OutPosCur)++;
|
||||
}
|
||||
if (pState->OutPosCur >= pState->OutLength) {
|
||||
unsigned char *pOut;
|
||||
pState->OutLength += GIF_LZW_PAGE_SIZE;
|
||||
/* Note pState->pOut not free()d by realloc() on failure */
|
||||
if (!(pOut = (unsigned char *) realloc(pState->pOut, pState->OutLength))) {
|
||||
return 1;
|
||||
}
|
||||
pState->pOut = pOut;
|
||||
}
|
||||
|
||||
(pState->pOut)[pState->OutPosCur] = 0x00;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int AddCodeToBuffer(statestruct *pState, unsigned short CodeIn, unsigned char CodeBits) {
|
||||
static void AddCodeToBuffer(statestruct *pState, unsigned short CodeIn, unsigned char CodeBits) {
|
||||
/* Check, if we may fill up the current byte completely */
|
||||
if (CodeBits >= pState->OutBitsFree) {
|
||||
(pState->pOut)[pState->OutPosCur] |= (unsigned char) (CodeIn << (8 - pState->OutBitsFree));
|
||||
if (BufferNextByte(pState))
|
||||
return -1;
|
||||
BufferNextByte(pState);
|
||||
CodeIn = (unsigned short) (CodeIn >> pState->OutBitsFree);
|
||||
CodeBits -= pState->OutBitsFree;
|
||||
pState->OutBitsFree = 8;
|
||||
/* Write a full byte if there are at least 8 code bits left */
|
||||
if (CodeBits >= pState->OutBitsFree) {
|
||||
(pState->pOut)[pState->OutPosCur] = (unsigned char) CodeIn;
|
||||
if (BufferNextByte(pState))
|
||||
return -1;
|
||||
BufferNextByte(pState);
|
||||
CodeIn = (unsigned short) (CodeIn >> 8);
|
||||
CodeBits -= 8;
|
||||
}
|
||||
@ -131,7 +107,6 @@ static int AddCodeToBuffer(statestruct *pState, unsigned short CodeIn, unsigned
|
||||
(pState->pOut)[pState->OutPosCur] |= (unsigned char) (CodeIn << (8 - pState->OutBitsFree));
|
||||
pState->OutBitsFree -= CodeBits;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void FlushStringTable(statestruct *pState) {
|
||||
@ -158,21 +133,22 @@ static int NextCode(statestruct *pState, unsigned char *pPixelValueCur, unsigned
|
||||
unsigned short DownNode;
|
||||
/* start with the root node for last pixel chain */
|
||||
UpNode = *pPixelValueCur;
|
||||
if ((pState->InLen) == 0)
|
||||
return AddCodeToBuffer(pState, UpNode, CodeBits);
|
||||
|
||||
*pPixelValueCur = NextPaletteIndex(pState);
|
||||
if (pState->pIn == pState->pInEnd) {
|
||||
AddCodeToBuffer(pState, UpNode, CodeBits);
|
||||
return 0;
|
||||
}
|
||||
*pPixelValueCur = pState->map[*pState->pIn++];
|
||||
/* Follow the string table and the data stream to the end of the longest string that has a code */
|
||||
while (0 != (DownNode = FindPixelOutlet(pState, UpNode, *pPixelValueCur))) {
|
||||
UpNode = DownNode;
|
||||
if ((pState->InLen) == 0)
|
||||
return AddCodeToBuffer(pState, UpNode, CodeBits);
|
||||
|
||||
*pPixelValueCur = NextPaletteIndex(pState);
|
||||
if (pState->pIn == pState->pInEnd) {
|
||||
AddCodeToBuffer(pState, UpNode, CodeBits);
|
||||
return 0;
|
||||
}
|
||||
*pPixelValueCur = pState->map[*pState->pIn++];
|
||||
}
|
||||
/* Submit 'UpNode' which is the code of the longest string */
|
||||
if (AddCodeToBuffer(pState, UpNode, CodeBits))
|
||||
return -1;
|
||||
AddCodeToBuffer(pState, UpNode, CodeBits);
|
||||
/* ... and extend the string by appending 'PixelValueCur' */
|
||||
/* Create a successor node for 'PixelValueCur' whose code is 'freecode' */
|
||||
(pState->NodePix)[pState->FreeCode] = *pPixelValueCur;
|
||||
@ -196,9 +172,9 @@ static int gif_lzw(statestruct *pState, int paletteBitSize) {
|
||||
unsigned short Pos;
|
||||
|
||||
/* > Get first data byte */
|
||||
if (pState->InLen == 0)
|
||||
if (pState->pIn == pState->pInEnd)
|
||||
return 0;
|
||||
PixelValueCur = NextPaletteIndex(pState);
|
||||
PixelValueCur = pState->map[*pState->pIn++];
|
||||
/* Number of bits per data item (=pixel)
|
||||
* We need at least a value of 2, otherwise the cc and eoi code consumes
|
||||
* the whole string table
|
||||
@ -211,12 +187,9 @@ static int gif_lzw(statestruct *pState, int paletteBitSize) {
|
||||
pState->ClearCode = (1 << paletteBitSize);
|
||||
pState->FreeCode = pState->ClearCode + 2;
|
||||
pState->OutBitsFree = 8;
|
||||
pState->OutPosCur = -1;
|
||||
pState->OutPosCur = 0;
|
||||
pState->fByteCountByteSet = 0;
|
||||
|
||||
if (BufferNextByte(pState))
|
||||
return 0;
|
||||
|
||||
for (Pos = 0; Pos < pState->ClearCode; Pos++)
|
||||
(pState->NodePix)[Pos] = (unsigned char) Pos;
|
||||
|
||||
@ -225,31 +198,21 @@ static int gif_lzw(statestruct *pState, int paletteBitSize) {
|
||||
/* Write what the GIF specification calls the "code size". */
|
||||
(pState->pOut)[pState->OutPosCur] = paletteBitSize;
|
||||
/* Reserve first bytecount byte */
|
||||
if (BufferNextByte(pState))
|
||||
return 0;
|
||||
BufferNextByte(pState);
|
||||
pState->OutByteCountPos = pState->OutPosCur;
|
||||
if (BufferNextByte(pState))
|
||||
return 0;
|
||||
BufferNextByte(pState);
|
||||
pState->fByteCountByteSet = 1;
|
||||
/* Submit one 'ClearCode' as the first code */
|
||||
if (AddCodeToBuffer(pState, pState->ClearCode, CodeBits))
|
||||
return 0;
|
||||
AddCodeToBuffer(pState, pState->ClearCode, CodeBits);
|
||||
|
||||
for (;;) {
|
||||
int Res;
|
||||
/* generate and save the next code, which may consist of multiple input pixels. */
|
||||
Res = NextCode(pState, &PixelValueCur, CodeBits);
|
||||
if (Res < 0)
|
||||
return 0;
|
||||
/* Check for end of data stream */
|
||||
if (!Res) {
|
||||
if (!NextCode(pState, &PixelValueCur, CodeBits)) { /* Check for end of data stream */
|
||||
/* submit 'eoi' as the last item of the code stream */
|
||||
if (AddCodeToBuffer(pState, (unsigned short) (pState->ClearCode + 1), CodeBits))
|
||||
return 0;
|
||||
AddCodeToBuffer(pState, (unsigned short) (pState->ClearCode + 1), CodeBits);
|
||||
pState->fByteCountByteSet = 0;
|
||||
if (pState->OutBitsFree < 8) {
|
||||
if (BufferNextByte(pState))
|
||||
return 0;
|
||||
BufferNextByte(pState);
|
||||
}
|
||||
/* > Update last bytecount byte; */
|
||||
if (pState->OutByteCountPos < pState->OutPosCur) {
|
||||
@ -257,17 +220,16 @@ static int gif_lzw(statestruct *pState, int paletteBitSize) {
|
||||
= (unsigned char) (pState->OutPosCur - pState->OutByteCountPos - 1);
|
||||
}
|
||||
pState->OutPosCur++;
|
||||
return pState->OutPosCur;
|
||||
return 1;
|
||||
}
|
||||
/* Check for currently last code */
|
||||
if (pState->FreeCode == (1U << CodeBits))
|
||||
CodeBits++;
|
||||
pState->FreeCode++;
|
||||
/* Check for full stringtable */
|
||||
/* Check for full stringtable - for widest compatibility with gif decoders, empty when 0xfff, not 0x1000 */
|
||||
if (pState->FreeCode == 0xfff) {
|
||||
FlushStringTable(pState);
|
||||
if (AddCodeToBuffer(pState, pState->ClearCode, CodeBits))
|
||||
return 0;
|
||||
AddCodeToBuffer(pState, pState->ClearCode, CodeBits);
|
||||
|
||||
CodeBits = (unsigned char) (1 + paletteBitSize);
|
||||
pState->FreeCode = (unsigned short) (pState->ClearCode + 2);
|
||||
@ -280,13 +242,9 @@ static int gif_lzw(statestruct *pState, int paletteBitSize) {
|
||||
*/
|
||||
INTERNAL int gif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf) {
|
||||
unsigned char outbuf[10];
|
||||
FILE *gif_file;
|
||||
unsigned short usTemp;
|
||||
int byte_out;
|
||||
int colourCount;
|
||||
unsigned char paletteRGB[10][3];
|
||||
int paletteCount, paletteCountCur, paletteIndex;
|
||||
unsigned int pixelIndex;
|
||||
int paletteCount, i;
|
||||
int paletteBitSize;
|
||||
int paletteSize;
|
||||
statestruct State;
|
||||
@ -294,30 +252,49 @@ INTERNAL int gif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
|
||||
int bgindex = -1, fgindex = -1;
|
||||
const int output_to_stdout = symbol->output_options & BARCODE_STDOUT;
|
||||
|
||||
unsigned char backgroundColourIndex;
|
||||
unsigned char RGBCur[3];
|
||||
unsigned char RGBUnused[3] = {0,0,0};
|
||||
static const unsigned char RGBUnused[3] = {0,0,0};
|
||||
unsigned char RGBfg[3];
|
||||
unsigned char RGBbg[3];
|
||||
unsigned char fgalpha;
|
||||
unsigned char bgalpha;
|
||||
|
||||
int colourIndex;
|
||||
|
||||
int fFound;
|
||||
|
||||
unsigned char pixelColour;
|
||||
unsigned int bitmapSize = symbol->bitmap_height * symbol->bitmap_width;
|
||||
|
||||
/* Allow for overhead of 4 == code size + byte count + overflow byte + zero terminator */
|
||||
unsigned int lzoutbufSize = bitmapSize + 4;
|
||||
if (lzoutbufSize > GIF_LZW_PAGE_SIZE) {
|
||||
lzoutbufSize = GIF_LZW_PAGE_SIZE;
|
||||
}
|
||||
const size_t bitmapSize = (size_t) symbol->bitmap_height * symbol->bitmap_width;
|
||||
|
||||
(void) out_colour_get_rgb(symbol->fgcolour, &RGBfg[0], &RGBfg[1], &RGBfg[2], &fgalpha);
|
||||
(void) out_colour_get_rgb(symbol->bgcolour, &RGBbg[0], &RGBbg[1], &RGBbg[2], &bgalpha);
|
||||
|
||||
/* prepare state array */
|
||||
State.pIn = pixelbuf;
|
||||
State.pInEnd = pixelbuf + bitmapSize;
|
||||
/* Allow for overhead of 4 == code size + byte count + overflow byte + zero terminator */
|
||||
State.OutLength = bitmapSize + 4;
|
||||
State.fOutPaged = State.OutLength > GIF_LZW_PAGE_SIZE;
|
||||
if (State.fOutPaged) {
|
||||
State.OutLength = GIF_LZW_PAGE_SIZE;
|
||||
}
|
||||
if (!(State.pOut = (unsigned char *) malloc(State.OutLength))) {
|
||||
strcpy(symbol->errtxt, "614: Insufficient memory for LZW buffer");
|
||||
return ZINT_ERROR_MEMORY;
|
||||
}
|
||||
|
||||
/* Open output file in binary mode */
|
||||
if (output_to_stdout) {
|
||||
#ifdef _MSC_VER
|
||||
if (-1 == _setmode(_fileno(stdout), _O_BINARY)) {
|
||||
sprintf(symbol->errtxt, "610: Could not set stdout to binary (%d: %.30s)", errno, strerror(errno));
|
||||
free(State.pOut);
|
||||
return ZINT_ERROR_FILE_ACCESS;
|
||||
}
|
||||
#endif
|
||||
State.file = stdout;
|
||||
} else {
|
||||
if (!(State.file = out_fopen(symbol->outfile, "wb"))) {
|
||||
sprintf(symbol->errtxt, "611: Could not open output file (%d: %.30s)", errno, strerror(errno));
|
||||
free(State.pOut);
|
||||
return ZINT_ERROR_FILE_ACCESS;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Build a table of the used palette items.
|
||||
* Currently, there are the following 10 colour codes:
|
||||
@ -332,138 +309,73 @@ INTERNAL int gif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
|
||||
* 'G': green
|
||||
* 'K': black
|
||||
* '0' and '1' may be identical to one of the other values
|
||||
*
|
||||
* A data structure is set up as follows:
|
||||
* state.colourCode: list of colour codes
|
||||
* paletteIndex: palette index of the corresponding colour code
|
||||
* There are colourCount entries in the upper lists.
|
||||
* paletteRGB: RGB value at the palette position
|
||||
* There are paletteCount entries.
|
||||
* This value is smaller to colourCount, if multiple colour codes have the
|
||||
* same RGB value and point to the same palette value.
|
||||
* Example:
|
||||
* 0 1 W K are present. 0 is equal to white, while 1 is blue
|
||||
* The resulting tables are:
|
||||
* paletteItem: ['0']=0 (white), ['1']=1 (blue), ['W']=0 (white),
|
||||
* ['K']=2 (black)
|
||||
* Thus, there are 4 colour codes and 3 palette entries.
|
||||
|
||||
*/
|
||||
colourCount = 0;
|
||||
paletteCount = 0;
|
||||
/* loop over all pixels */
|
||||
for (pixelIndex = 0; pixelIndex < bitmapSize; pixelIndex++) {
|
||||
fFound = 0;
|
||||
/* get pixel colour code */
|
||||
pixelColour = pixelbuf[pixelIndex];
|
||||
/* look, if colour code is already in colour list */
|
||||
for (colourIndex = 0; colourIndex < colourCount; colourIndex++) {
|
||||
if ((State.colourCode)[colourIndex] == pixelColour) {
|
||||
fFound = 1;
|
||||
break;
|
||||
memset(State.map, 0, sizeof(State.map));
|
||||
if (symbol->symbology == BARCODE_ULTRA) {
|
||||
static const unsigned char ultra_chars[8] = { 'W', 'C', 'B', 'M', 'R', 'Y', 'G', 'K' };
|
||||
for (i = 0; i < 8; i++) {
|
||||
State.map[ultra_chars[i]] = i;
|
||||
out_colour_char_to_rgb(ultra_chars[i], &paletteRGB[i][0], &paletteRGB[i][1], &paletteRGB[i][2]);
|
||||
}
|
||||
paletteCount = 8;
|
||||
paletteBitSize = 3;
|
||||
|
||||
/* For Ultracode, have foreground only if have bind/box */
|
||||
if (symbol->border_width > 0 && (symbol->output_options & (BARCODE_BIND | BARCODE_BOX | BARCODE_BIND_TOP))) {
|
||||
/* Check whether can re-use black */
|
||||
if (RGBfg[0] == 0 && RGBfg[1] == 0 && RGBfg[2] == 0) {
|
||||
State.map['1'] = fgindex = 7; /* Re-use black */
|
||||
} else {
|
||||
State.map['1'] = fgindex = paletteCount;
|
||||
memcpy(paletteRGB[paletteCount++], RGBfg, 3);
|
||||
paletteBitSize = 4;
|
||||
}
|
||||
}
|
||||
/* If colour is already present, go to next colour code */
|
||||
if (fFound)
|
||||
continue;
|
||||
|
||||
/* Colour code not present - add colour code */
|
||||
/* Get RGB value */
|
||||
switch (pixelColour) {
|
||||
case '0': /* standard background */
|
||||
RGBCur[0] = RGBbg[0]; RGBCur[1] = RGBbg[1]; RGBCur[2] = RGBbg[2];
|
||||
break;
|
||||
case '1': /* standard foreground */
|
||||
RGBCur[0] = RGBfg[0]; RGBCur[1] = RGBfg[1]; RGBCur[2] = RGBfg[2];
|
||||
break;
|
||||
default: /* Colour or error case */
|
||||
if (!out_colour_char_to_rgb(pixelColour, &RGBCur[0], &RGBCur[1], &RGBCur[2])) {
|
||||
strcpy(symbol->errtxt, "612: unknown pixel colour");
|
||||
return ZINT_ERROR_INVALID_DATA;
|
||||
}
|
||||
break;
|
||||
}
|
||||
/* Search, if RGB value is already present */
|
||||
fFound = 0;
|
||||
for (paletteIndex = 0; paletteIndex < paletteCount; paletteIndex++) {
|
||||
if (RGBCur[0] == paletteRGB[paletteIndex][0]
|
||||
&& RGBCur[1] == paletteRGB[paletteIndex][1]
|
||||
&& RGBCur[2] == paletteRGB[paletteIndex][2])
|
||||
{
|
||||
fFound = 1;
|
||||
break;
|
||||
/* For Ultracode, have background only if have whitespace/quiet zones */
|
||||
if (symbol->whitespace_width > 0 || symbol->whitespace_height > 0
|
||||
|| ((symbol->output_options & BARCODE_QUIET_ZONES)
|
||||
&& !(symbol->output_options & BARCODE_NO_QUIET_ZONES))) {
|
||||
/* Check whether can re-use white */
|
||||
if (RGBbg[0] == 0xff && RGBbg[1] == 0xff && RGBbg[2] == 0xff && bgalpha == fgalpha) {
|
||||
State.map['0'] = bgindex = 0; /* Re-use white */
|
||||
} else {
|
||||
State.map['0'] = bgindex = paletteCount;
|
||||
memcpy(paletteRGB[paletteCount++], RGBbg, 3);
|
||||
paletteBitSize = 4;
|
||||
}
|
||||
}
|
||||
/* RGB not present, add it */
|
||||
if (!fFound) {
|
||||
paletteIndex = paletteCount;
|
||||
paletteRGB[paletteIndex][0] = RGBCur[0];
|
||||
paletteRGB[paletteIndex][1] = RGBCur[1];
|
||||
|
||||
paletteRGB[paletteIndex][2] = RGBCur[2];
|
||||
|
||||
paletteCount++;
|
||||
|
||||
if (pixelColour == '0') bgindex = paletteIndex;
|
||||
if (pixelColour == '1') fgindex = paletteIndex;
|
||||
}
|
||||
/* Add palette index to current colour code */
|
||||
(State.colourCode)[colourCount] = pixelColour;
|
||||
(State.colourPaletteIndex)[colourCount] = paletteIndex;
|
||||
colourCount++;
|
||||
} else {
|
||||
State.map['0'] = bgindex = 0;
|
||||
memcpy(paletteRGB[bgindex], RGBbg, 3);
|
||||
State.map['1'] = fgindex = 1;
|
||||
memcpy(paletteRGB[fgindex], RGBfg, 3);
|
||||
paletteCount = 2;
|
||||
paletteBitSize = 1;
|
||||
}
|
||||
State.colourCount = colourCount;
|
||||
|
||||
/* Set transparency */
|
||||
/* Note: does not allow both transparent foreground and background -
|
||||
* background takes priority */
|
||||
transparent_index = -1;
|
||||
if (bgalpha == 0) {
|
||||
if (bgalpha == 0 && bgindex != -1) {
|
||||
/* Transparent background */
|
||||
transparent_index = bgindex;
|
||||
} else if (fgalpha == 0) {
|
||||
} else if (fgalpha == 0 && fgindex != -1) {
|
||||
/* Transparent foreground */
|
||||
transparent_index = fgindex;
|
||||
}
|
||||
|
||||
/* find palette bit size from palette size*/
|
||||
|
||||
/* 1,2 -> 1, 3,4 ->2, 5,6,7,8->3 */
|
||||
paletteBitSize = 0;
|
||||
paletteCountCur = paletteCount - 1;
|
||||
while (paletteCountCur != 0) {
|
||||
paletteBitSize++;
|
||||
paletteCountCur >>= 1;
|
||||
}
|
||||
/* Minimum is 1 */
|
||||
if (paletteBitSize == 0)
|
||||
paletteBitSize = 1;
|
||||
|
||||
/* palette size 2 ^ bit size */
|
||||
paletteSize = 1 << paletteBitSize;
|
||||
|
||||
/* Open output file in binary mode */
|
||||
if (output_to_stdout) {
|
||||
#ifdef _MSC_VER
|
||||
if (-1 == _setmode(_fileno(stdout), _O_BINARY)) {
|
||||
sprintf(symbol->errtxt, "610: Could not set stdout to binary (%d: %.30s)", errno, strerror(errno));
|
||||
return ZINT_ERROR_FILE_ACCESS;
|
||||
}
|
||||
#endif
|
||||
gif_file = stdout;
|
||||
} else {
|
||||
if (!(gif_file = out_fopen(symbol->outfile, "wb"))) {
|
||||
sprintf(symbol->errtxt, "611: Could not open output file (%d: %.30s)", errno, strerror(errno));
|
||||
return ZINT_ERROR_FILE_ACCESS;
|
||||
}
|
||||
}
|
||||
|
||||
/* GIF signature (6) */
|
||||
memcpy(outbuf, "GIF87a", 6);
|
||||
if (transparent_index != -1)
|
||||
outbuf[4] = '9';
|
||||
|
||||
fwrite(outbuf, 6, 1, gif_file);
|
||||
fwrite(outbuf, 1, 6, State.file);
|
||||
/* Screen Descriptor (7) */
|
||||
/* Screen Width */
|
||||
usTemp = (unsigned short) symbol->bitmap_width;
|
||||
@ -479,7 +391,7 @@ INTERNAL int gif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
|
||||
* 1 : Global colour map
|
||||
* 111 : 8 bit colour depth of the palette
|
||||
* 0 : Not ordered in decreasing importance
|
||||
* xxx : palette bit zize - 1
|
||||
* xxx : palette bit size - 1
|
||||
*/
|
||||
outbuf[4] = (unsigned char) (0xf0 | (0x7 & (paletteBitSize - 1)));
|
||||
|
||||
@ -487,23 +399,15 @@ INTERNAL int gif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
|
||||
* Background colour index
|
||||
* Default to 0. If colour code 0 or K is present, it is used as index
|
||||
*/
|
||||
|
||||
backgroundColourIndex = 0;
|
||||
for (colourIndex = 0; colourIndex < colourCount; colourIndex++) {
|
||||
if ((State.colourCode)[colourIndex] == '0' || (State.colourCode)[colourIndex] == 'W') {
|
||||
backgroundColourIndex = (State.colourPaletteIndex)[colourIndex];
|
||||
break;
|
||||
}
|
||||
}
|
||||
outbuf[5] = backgroundColourIndex;
|
||||
outbuf[5] = bgindex == -1 ? 0 : bgindex;
|
||||
/* Byte 7 must be 0x00 */
|
||||
outbuf[6] = 0x00;
|
||||
fwrite(outbuf, 7, 1, gif_file);
|
||||
fwrite(outbuf, 1, 7, State.file);
|
||||
/* Global Color Table (paletteSize*3) */
|
||||
fwrite(paletteRGB, 3*paletteCount, 1, gif_file);
|
||||
fwrite(paletteRGB, 1, 3*paletteCount, State.file);
|
||||
/* add unused palette items to fill palette size */
|
||||
for (paletteIndex = paletteCount; paletteIndex < paletteSize; paletteIndex++) {
|
||||
fwrite(RGBUnused, 3, 1, gif_file);
|
||||
for (i = paletteCount; i < paletteSize; i++) {
|
||||
fwrite(RGBUnused, 1, 3, State.file);
|
||||
}
|
||||
|
||||
/* Graphic control extension (8) */
|
||||
@ -531,7 +435,7 @@ INTERNAL int gif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
|
||||
outbuf[6] = (unsigned char) transparent_index;
|
||||
/* Block Terminator */
|
||||
outbuf[7] = 0;
|
||||
fwrite(outbuf, 8, 1, gif_file);
|
||||
fwrite(outbuf, 1, 8, State.file);
|
||||
}
|
||||
/* Image Descriptor */
|
||||
/* Image separator character = ',' */
|
||||
@ -554,51 +458,38 @@ INTERNAL int gif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
|
||||
* There is no local color table if its most significant bit is reset.
|
||||
*/
|
||||
outbuf[9] = 0x00;
|
||||
fwrite(outbuf, 10, 1, gif_file);
|
||||
|
||||
/* prepare state array */
|
||||
State.pIn = pixelbuf;
|
||||
State.InLen = bitmapSize;
|
||||
if (!(State.pOut = (unsigned char *) malloc(lzoutbufSize))) {
|
||||
if (!output_to_stdout) {
|
||||
(void) fclose(gif_file);
|
||||
}
|
||||
strcpy(symbol->errtxt, "614: Insufficient memory for LZW buffer");
|
||||
return ZINT_ERROR_MEMORY;
|
||||
}
|
||||
State.OutLength = lzoutbufSize;
|
||||
fwrite(outbuf, 1, 10, State.file);
|
||||
|
||||
/* call lzw encoding */
|
||||
byte_out = gif_lzw(&State, paletteBitSize);
|
||||
if (byte_out <= 0) {
|
||||
if (!gif_lzw(&State, paletteBitSize)) {
|
||||
free(State.pOut);
|
||||
if (!output_to_stdout) {
|
||||
(void) fclose(gif_file);
|
||||
(void) fclose(State.file);
|
||||
}
|
||||
strcpy(symbol->errtxt, "613: Insufficient memory for LZW buffer");
|
||||
return ZINT_ERROR_MEMORY;
|
||||
}
|
||||
fwrite((const char *) State.pOut, byte_out, 1, gif_file);
|
||||
fwrite((const char *) State.pOut, 1, State.OutPosCur, State.file);
|
||||
free(State.pOut);
|
||||
|
||||
/* GIF terminator */
|
||||
fputc('\x3b', gif_file);
|
||||
fputc('\x3b', State.file);
|
||||
|
||||
if (ferror(gif_file)) {
|
||||
if (ferror(State.file)) {
|
||||
sprintf(symbol->errtxt, "615: Incomplete write to output (%d: %.30s)", errno, strerror(errno));
|
||||
if (!output_to_stdout) {
|
||||
(void) fclose(gif_file);
|
||||
(void) fclose(State.file);
|
||||
}
|
||||
return ZINT_ERROR_FILE_WRITE;
|
||||
}
|
||||
|
||||
if (output_to_stdout) {
|
||||
if (fflush(gif_file) != 0) {
|
||||
if (fflush(State.file) != 0) {
|
||||
sprintf(symbol->errtxt, "616: Incomplete flush to output (%d: %.30s)", errno, strerror(errno));
|
||||
return ZINT_ERROR_FILE_WRITE;
|
||||
}
|
||||
} else {
|
||||
if (fclose(gif_file) != 0) {
|
||||
if (fclose(State.file) != 0) {
|
||||
sprintf(symbol->errtxt, "617: Failure on closing output file (%d: %.30s)", errno, strerror(errno));
|
||||
return ZINT_ERROR_FILE_WRITE;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user