static
void
_gdPutHeader (gdImagePtr im, gdIOCtx * out)
{
/* 65535 indicates this is a gd 2.x .gd file. */
gdPutWord (65535, out);
gdPutWord (im->sx, out);
gdPutWord (im->sy, out);
_gdPutColors (im, out);
}
static void
_gdPutHeader (gdImagePtr im, gdIOCtx * out)
{
/* 65535 indicates this is a gd 2.x .gd file.
2.0.12: 65534 indicates truecolor. */
if (im->trueColor) {
gdPutWord (65534, out);
} else {
gdPutWord (65535, out);
}
gdPutWord (im->sx, out);
gdPutWord (im->sy, out);
_gdPutColors (im, out);
}
static void
_gdImageGd2 (gdImagePtr im, gdIOCtx * out, int cs, int fmt)
{
int ncx, ncy, cx, cy;
int x, y, ylo, yhi, xlo, xhi;
int chunkLen;
int chunkNum = 0;
char *chunkData = NULL; /* So we can gdFree it with impunity. */
char *compData = NULL; /* So we can gdFree it with impunity. */
uLongf compLen;
int idxPos = 0;
int idxSize;
t_chunk_info *chunkIdx = NULL;
int posSave;
int bytesPerPixel = im->trueColor ? 4 : 1;
int compMax = 0;
/*printf("Trying to write GD2 file\n"); */
/* */
/* Force fmt to a valid value since we don't return anything. */
/* */
if ((fmt != GD2_FMT_RAW) && (fmt != GD2_FMT_COMPRESSED))
{
fmt = im->trueColor ? GD2_FMT_TRUECOLOR_COMPRESSED : GD2_FMT_COMPRESSED;
};
if (im->trueColor)
{
fmt += 2;
}
/* */
/* Make sure chunk size is valid. These are arbitrary values; 64 because it seems */
/* a little silly to expect performance improvements on a 64x64 bit scale, and */
/* 4096 because we buffer one chunk, and a 16MB buffer seems a little large - it may be */
/* OK for one user, but for another to read it, they require the buffer. */
/* */
if (cs == 0)
{
cs = GD2_CHUNKSIZE;
}
else if (cs < GD2_CHUNKSIZE_MIN)
{
cs = GD2_CHUNKSIZE_MIN;
}
else if (cs > GD2_CHUNKSIZE_MAX)
{
cs = GD2_CHUNKSIZE_MAX;
};
/* Work out number of chunks. */
ncx = im->sx / cs + 1;
ncy = im->sy / cs + 1;
/* Write the standard header. */
_gd2PutHeader (im, out, cs, fmt, ncx, ncy);
if (gd2_compressed (fmt))
{
/* */
/* Work out size of buffer for compressed data, If CHUNKSIZE is large, */
/* then these will be large! */
/* */
/* The zlib notes say output buffer size should be (input size) * 1.01 * 12 */
/* - we'll use 1.02 to be paranoid. */
/* */
compMax = cs * bytesPerPixel * cs * 1.02 + 12;
/* */
/* Allocate the buffers. */
/* */
chunkData = gdCalloc (cs * bytesPerPixel * cs, 1);
if (!chunkData) {
goto fail;
}
compData = gdCalloc (compMax, 1);
if (!compData) {
goto fail;
}
/* */
/* Save the file position of chunk index, and allocate enough space for */
/* each chunk_info block . */
/* */
idxPos = gdTell (out);
idxSize = ncx * ncy * sizeof (t_chunk_info);
GD2_DBG (printf ("Index size is %d\n", idxSize));
gdSeek (out, idxPos + idxSize);
chunkIdx = gdCalloc (idxSize * sizeof (t_chunk_info), 1);
if (!chunkIdx) {
goto fail;
}
};
_gdPutColors (im, out);
GD2_DBG (printf ("Size: %dx%d\n", im->sx, im->sy));
GD2_DBG (printf ("Chunks: %dx%d\n", ncx, ncy));
for (cy = 0; (cy < ncy); cy++)
{
for (cx = 0; (cx < ncx); cx++)
{
ylo = cy * cs;
yhi = ylo + cs;
if (yhi > im->sy)
{
yhi = im->sy;
};
GD2_DBG (printf
("Processing Chunk (%dx%d), y from %d to %d\n", cx, cy,
ylo, yhi));
chunkLen = 0;
for (y = ylo; (y < yhi); y++)
{
/*GD2_DBG(printf("y=%d: ",y)); */
xlo = cx * cs;
xhi = xlo + cs;
if (xhi > im->sx)
{
xhi = im->sx;
};
if (gd2_compressed (fmt))
{
for (x = xlo; x < xhi; x++)
{
/* 2.0.11: use truecolor pixel array. TBB */
/*GD2_DBG(printf("%d...",x)); */
if (im->trueColor)
{
int p = im->tpixels[y][x];
chunkData[chunkLen++] = gdTrueColorGetAlpha (p);
chunkData[chunkLen++] = gdTrueColorGetRed (p);
chunkData[chunkLen++] = gdTrueColorGetGreen (p);
chunkData[chunkLen++] = gdTrueColorGetBlue (p);
}
else
{
int p = im->pixels[y][x];
chunkData[chunkLen++] = p;
}
};
}
else
{
for (x = xlo; x < xhi; x++)
{
/*GD2_DBG(printf("%d, ",x)); */
if (im->trueColor)
{
gdPutInt (im->tpixels[y][x], out);
}
else
{
gdPutC ((unsigned char) im->pixels[y][x], out);
}
};
};
/*GD2_DBG(printf("y=%d done.\n",y)); */
};
if (gd2_compressed (fmt))
{
compLen = compMax;
if (compress ((unsigned char *)
&compData[0], &compLen,
(unsigned char *) &chunkData[0],
chunkLen) != Z_OK)
{
printf ("Error from compressing\n");
}
else
{
chunkIdx[chunkNum].offset = gdTell (out);
chunkIdx[chunkNum++].size = compLen;
GD2_DBG (printf
("Chunk %d size %d offset %d\n", chunkNum,
chunkIdx[chunkNum - 1].size,
chunkIdx[chunkNum - 1].offset));
if (gdPutBuf (compData, compLen, out) <= 0)
{
fprintf(stderr, "gd write error\n");
};
};
};
};
};
if (gd2_compressed (fmt))
{
/* Save the position, write the index, restore position (paranoia). */
GD2_DBG (printf ("Seeking %d to write index\n", idxPos));
posSave = gdTell (out);
gdSeek (out, idxPos);
GD2_DBG (printf ("Writing index\n"));
for (x = 0; x < chunkNum; x++)
{
GD2_DBG (printf
("Chunk %d size %d offset %d\n", x, chunkIdx[x].size,
chunkIdx[x].offset));
gdPutInt (chunkIdx[x].offset, out);
gdPutInt (chunkIdx[x].size, out);
};
/* We don't use fwrite for *endian reasons. */
/*fwrite(chunkIdx, sizeof(int)*2, chunkNum, out); */
gdSeek (out, posSave);
};
/*printf("Memory block size is %d\n",gdTell(out)); */
fail:
GD2_DBG (printf ("Freeing memory\n"));
if (chunkData) {
gdFree (chunkData);
}
if (compData) {
gdFree (compData);
}
if (chunkIdx) {
gdFree (chunkIdx);
}
GD2_DBG (printf ("Done\n"));
}