Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

971 lines (788 sloc) 23.231 kb
#include "imageri.h"
#include "log.h"
#include "iolayer.h"
#include <stdlib.h>
#include <errno.h>
/*
=head1 NAME
tga.c - implements reading and writing targa files, uses io layer.
=head1 SYNOPSIS
io_glue *ig = io_new_fd( fd );
i_img *im = i_readtga_wiol(ig, -1); // no limit on how much is read
// or
io_glue *ig = io_new_fd( fd );
return_code = i_writetga_wiol(im, ig);
=head1 DESCRIPTION
tga.c implements the basic functions to read and write portable targa
files. It uses the iolayer and needs either a seekable source or an
entire memory mapped buffer.
=head1 FUNCTION REFERENCE
Some of these functions are internal.
=over
=cut
*/
typedef struct {
unsigned char idlength;
char colourmaptype;
char datatypecode;
short int colourmaporigin;
short int colourmaplength;
char colourmapdepth;
short int x_origin;
short int y_origin;
int width;
int height;
char bitsperpixel;
char imagedescriptor;
} tga_header;
typedef enum { NoInit, Raw, Rle } rle_state;
typedef struct {
int compressed;
size_t bytepp;
rle_state state;
unsigned char cval[4];
int len;
unsigned char hdr;
io_glue *ig;
} tga_source;
typedef struct {
int compressed;
int bytepp;
io_glue *ig;
} tga_dest;
#define TGA_MAX_DIM 0xFFFF
/*
=item bpp_to_bytes(bpp)
Convert bits per pixel into bytes per pixel
bpp - bits per pixel
=cut
*/
static
size_t
bpp_to_bytes(unsigned int bpp) {
switch (bpp) {
case 8:
return 1;
case 15:
case 16:
return 2;
case 24:
return 3;
case 32:
return 4;
}
return 0;
}
/*
=item bpp_to_channels(bpp)
Convert bits per pixel and the number of attribute bits into channels
in the image
bpp - bits per pixel
attr_bit_count - number of attribute bits
=cut
*/
static
int
bpp_to_channels(unsigned int bpp, int attr_bit_count) {
switch (bpp) {
case 8:
return 1;
case 16:
if (attr_bit_count == 1)
return 4;
case 15:
return 3;
case 32:
if (attr_bit_count == 8)
return 4;
case 24:
return 3;
}
return 0;
}
/*
* Packing functions - used for (un)packing
* datastructures into raw bytes.
*/
/*
=item color_unpack(buf, bytepp, val)
Unpacks bytes into colour structures, for 2 byte type the first byte
coming from the file will actually be GGGBBBBB, and the second will be
ARRRRRGG. "A" represents an attribute bit. The 3 byte entry contains
1 byte each of blue, green, and red. The 4 byte entry contains 1 byte
each of blue, green, red, and attribute.
buf - pointer to data
bytepp - bytes per pixel
val - pointer to color to store to
=cut
*/
static
void
color_unpack(unsigned char *buf, int bytepp, i_color *val) {
switch (bytepp) {
case 1:
val->gray.gray_color = buf[0];
break;
case 2:
val->rgba.r = (buf[1] & 0x7c) << 1;
val->rgba.g = ((buf[1] & 0x03) << 6) | ((buf[0] & 0xe0) >> 2);
val->rgba.b = (buf[0] & 0x1f) << 3;
val->rgba.a = (buf[1] & 0x80) ? 0 : 255;
val->rgba.r |= val->rgba.r >> 5;
val->rgba.g |= val->rgba.g >> 5;
val->rgba.b |= val->rgba.b >> 5;
break;
case 3:
val->rgb.b = buf[0];
val->rgb.g = buf[1];
val->rgb.r = buf[2];
break;
case 4:
val->rgba.b = buf[0];
val->rgba.g = buf[1];
val->rgba.r = buf[2];
val->rgba.a = buf[3];
break;
}
}
/*
=item color_pack
Packs a colour into an array of bytes, for 2 byte type the first byte
will be GGGBBBBB, and the second will be ARRRRRGG. "A" represents an
attribute bit. The 3 byte entry contains 1 byte each of blue, green,
and red. The 4 byte entry contains 1 byte each of blue, green, red,
and attribute.
buf - destination buffer
bitspp - bits per pixel
val - color to pack
=cut
*/
static
void
color_pack(unsigned char *buf, int bitspp, i_color *val) {
switch (bitspp) {
case 8:
buf[0] = val->gray.gray_color;
break;
case 16:
buf[0] = (val->rgba.b >> 3);
buf[0] |= (val->rgba.g & 0x38) << 2;
buf[1] = (val->rgba.r & 0xf8)>> 1;
buf[1] |= (val->rgba.g >> 6);
buf[1] |= val->rgba.a > 0x7f ? 0 : 0x80;
break;
case 15:
buf[0] = (val->rgba.b >> 3);
buf[0] |= (val->rgba.g & 0x38) << 2;
buf[1] = (val->rgba.r & 0xf8)>> 1;
buf[1] |= (val->rgba.g >> 6);
break;
case 24:
buf[0] = val->rgb.b;
buf[1] = val->rgb.g;
buf[2] = val->rgb.r;
break;
case 32:
buf[0] = val->rgba.b;
buf[1] = val->rgba.g;
buf[2] = val->rgba.r;
buf[3] = val->rgba.a;
break;
}
}
/*
=item find_repeat
Helper function for rle compressor to find the next triple repeat of the
same pixel value in buffer.
buf - buffer
length - number of pixel values in buffer
bytepp - number of bytes in a pixel value
=cut
*/
static
int
find_repeat(unsigned char *buf, int length, int bytepp) {
int i = 0;
while(i<length-1) {
if(memcmp(buf+i*bytepp, buf+(i+1)*bytepp, bytepp) == 0) {
if (i == length-2) return -1;
if (memcmp(buf+(i+1)*bytepp, buf+(i+2)*bytepp,bytepp) == 0)
return i;
else i++;
}
i++;
}
return -1;
}
/*
=item find_span
Helper function for rle compressor to find the length of a span where
the same pixel value is in the buffer.
buf - buffer
length - number of pixel values in buffer
bytepp - number of bytes in a pixel value
=cut
*/
static
int
find_span(unsigned char *buf, int length, int bytepp) {
int i = 0;
while(i<length) {
if(memcmp(buf, buf+(i*bytepp), bytepp) != 0) return i;
i++;
}
return length;
}
/*
=item tga_header_unpack(header, headbuf)
Unpacks the header structure into from buffer and stores
in the header structure.
header - header structure
headbuf - buffer to unpack from
=cut
*/
static
void
tga_header_unpack(tga_header *header, unsigned char headbuf[18]) {
header->idlength = headbuf[0];
header->colourmaptype = headbuf[1];
header->datatypecode = headbuf[2];
header->colourmaporigin = (headbuf[4] << 8) + headbuf[3];
header->colourmaplength = (headbuf[6] << 8) + headbuf[5];
header->colourmapdepth = headbuf[7];
header->x_origin = (headbuf[9] << 8) + headbuf[8];
header->y_origin = (headbuf[11] << 8) + headbuf[10];
header->width = (headbuf[13] << 8) + headbuf[12];
header->height = (headbuf[15] << 8) + headbuf[14];
header->bitsperpixel = headbuf[16];
header->imagedescriptor = headbuf[17];
}
/* this function should never produce diagnostics to stdout, maybe to the logfile */
int
tga_header_verify(unsigned char headbuf[18]) {
tga_header header;
tga_header_unpack(&header, headbuf);
switch (header.datatypecode) {
default:
/*printf("bad typecode!\n");*/
return 0;
case 1: /* Uncompressed, color-mapped images */
case 3: /* Uncompressed, grayscale images */
case 9: /* Compressed, color-mapped images */
case 11: /* Compressed, grayscale images */
if (header.bitsperpixel != 8)
return 0;
break;
case 0:
case 2: /* Uncompressed, rgb images */
case 10: /* Compressed, rgb images */
if (header.bitsperpixel != 15 && header.bitsperpixel != 16
&& header.bitsperpixel != 24 && header.bitsperpixel != 32)
return 0;
break;
}
switch (header.colourmaptype) {
default:
/*printf("bad colourmaptype!\n");*/
return 0;
case 1:
if (header.datatypecode != 1 && header.datatypecode != 9)
return 0; /* only get a color map on a color mapped image */
case 0:
break;
}
switch (header.colourmapdepth) {
default:
return 0;
case 0: /* can be 0 if no colour map */
case 15:
case 16:
case 24:
case 32:
break;
}
return 1;
}
/*
=item tga_header_pack(header, headbuf)
Packs header structure into buffer for writing.
header - header structure
headbuf - buffer to pack into
=cut
*/
static
void
tga_header_pack(tga_header *header, unsigned char headbuf[18]) {
headbuf[0] = header->idlength;
headbuf[1] = header->colourmaptype;
headbuf[2] = header->datatypecode;
headbuf[3] = header->colourmaporigin & 0xff;
headbuf[4] = header->colourmaporigin >> 8;
headbuf[5] = header->colourmaplength & 0xff;
headbuf[6] = header->colourmaplength >> 8;
headbuf[7] = header->colourmapdepth;
headbuf[8] = header->x_origin & 0xff;
headbuf[9] = header->x_origin >> 8;
headbuf[10] = header->y_origin & 0xff;
headbuf[11] = header->y_origin >> 8;
headbuf[12] = header->width & 0xff;
headbuf[13] = header->width >> 8;
headbuf[14] = header->height & 0xff;
headbuf[15] = header->height >> 8;
headbuf[16] = header->bitsperpixel;
headbuf[17] = header->imagedescriptor;
}
/*
=item tga_source_read(s, buf, pixels)
Reads pixel number of pixels from source s into buffer buf. Takes
care of decompressing the stream if needed.
s - data source
buf - destination buffer
pixels - number of pixels to put into buffer
=cut
*/
static
int
tga_source_read(tga_source *s, unsigned char *buf, size_t pixels) {
int cp = 0, j, k;
if (!s->compressed) {
if (i_io_read(s->ig, buf, pixels*s->bytepp) != pixels*s->bytepp) return 0;
return 1;
}
while(cp < pixels) {
int ml;
if (s->len == 0) s->state = NoInit;
switch (s->state) {
case NoInit:
if (i_io_read(s->ig, &s->hdr, 1) != 1) return 0;
s->len = (s->hdr &~(1<<7))+1;
s->state = (s->hdr & (1<<7)) ? Rle : Raw;
{
/*
static cnt = 0;
printf("%04d %s: %d\n", cnt++, s->state==Rle?"RLE":"RAW", s->len);
*/
}
if (s->state == Rle && i_io_read(s->ig, s->cval, s->bytepp) != s->bytepp) return 0;
break;
case Rle:
ml = i_min(s->len, pixels-cp);
for(k=0; k<ml; k++) for(j=0; j<s->bytepp; j++)
buf[(cp+k)*s->bytepp+j] = s->cval[j];
cp += ml;
s->len -= ml;
break;
case Raw:
ml = i_min(s->len, pixels-cp);
if (i_io_read(s->ig, buf+cp*s->bytepp, ml*s->bytepp) != ml*s->bytepp) return 0;
cp += ml;
s->len -= ml;
break;
}
}
return 1;
}
/*
=item tga_dest_write(s, buf, pixels)
Writes pixels from buf to destination s. Takes care of compressing if the
destination is compressed.
s - data destination
buf - source buffer
pixels - number of pixels to put write to destination
=cut
*/
static
int
tga_dest_write(tga_dest *s, unsigned char *buf, size_t pixels) {
int cp = 0;
if (!s->compressed) {
if (i_io_write(s->ig, buf, pixels*s->bytepp) != pixels*s->bytepp) return 0;
return 1;
}
while(cp < pixels) {
int tlen;
int nxtrip = find_repeat(buf+cp*s->bytepp, pixels-cp, s->bytepp);
tlen = (nxtrip == -1) ? pixels-cp : nxtrip;
while(tlen) {
unsigned char clen = (tlen>128) ? 128 : tlen;
clen--;
if (i_io_write(s->ig, &clen, 1) != 1) return 0;
clen++;
if (i_io_write(s->ig, buf+cp*s->bytepp, clen*s->bytepp) != clen*s->bytepp) return 0;
tlen -= clen;
cp += clen;
}
if (cp >= pixels) break;
tlen = find_span(buf+cp*s->bytepp, pixels-cp, s->bytepp);
if (tlen <3) continue;
while (tlen) {
unsigned char clen = (tlen>128) ? 128 : tlen;
clen = (clen - 1) | 0x80;
if (i_io_write(s->ig, &clen, 1) != 1) return 0;
clen = (clen & ~0x80) + 1;
if (i_io_write(s->ig, buf+cp*s->bytepp, s->bytepp) != s->bytepp) return 0;
tlen -= clen;
cp += clen;
}
}
return 1;
}
/*
=item tga_palette_read(ig, img, bytepp, colourmaplength)
Reads the colormap from a tga file and stores in the paletted image
structure.
ig - iolayer data source
img - image structure
bytepp - bytes per pixel
colourmaplength - number of colours in colourmap
=cut
*/
static
int
tga_palette_read(io_glue *ig, i_img *img, int bytepp, int colourmaplength) {
int i;
size_t palbsize;
unsigned char *palbuf;
i_color val;
palbsize = colourmaplength*bytepp;
palbuf = mymalloc(palbsize);
if (i_io_read(ig, palbuf, palbsize) != palbsize) {
i_push_error(errno, "could not read targa colourmap");
return 0;
}
/* populate the palette of the new image */
for(i=0; i<colourmaplength; i++) {
color_unpack(palbuf+i*bytepp, bytepp, &val);
i_addcolors(img, &val, 1);
}
myfree(palbuf);
return 1;
}
/*
=item tga_palette_write(ig, img, bitspp, colourmaplength)
Stores the colormap of an image in the destination ig.
ig - iolayer data source
img - image structure
bitspp - bits per pixel in colourmap
colourmaplength - number of colours in colourmap
=cut
*/
static
int
tga_palette_write(io_glue *ig, i_img *img, int bitspp, int colourmaplength) {
int i;
size_t bytepp = bpp_to_bytes(bitspp);
size_t palbsize = i_colorcount(img)*bytepp;
unsigned char *palbuf = mymalloc(palbsize);
for(i=0; i<colourmaplength; i++) {
i_color val;
i_getcolors(img, i, &val, 1);
color_pack(palbuf+i*bytepp, bitspp, &val);
}
if (i_io_write(ig, palbuf, palbsize) != palbsize) {
i_push_error(errno, "could not write targa colourmap");
return 0;
}
myfree(palbuf);
return 1;
}
/*
=item i_readtga_wiol(ig, length)
Read in an image from the iolayer data source and return the image structure to it.
Returns NULL on error.
ig - io_glue object
length - maximum length to read from data source, before closing it -1
signifies no limit.
=cut
*/
i_img *
i_readtga_wiol(io_glue *ig, int length) {
i_img* img = NULL;
int x, y;
int width, height, channels;
int mapped;
char *idstring = NULL;
tga_source src;
tga_header header;
unsigned char headbuf[18];
unsigned char *databuf;
i_color *linebuf = NULL;
i_clear_error();
mm_log((1,"i_readtga(ig %p, length %d)\n", ig, length));
if (i_io_read(ig, &headbuf, 18) != 18) {
i_push_error(errno, "could not read targa header");
return NULL;
}
tga_header_unpack(&header, headbuf);
mm_log((1,"Id length: %d\n",header.idlength));
mm_log((1,"Colour map type: %d\n",header.colourmaptype));
mm_log((1,"Image type: %d\n",header.datatypecode));
mm_log((1,"Colour map offset: %d\n",header.colourmaporigin));
mm_log((1,"Colour map length: %d\n",header.colourmaplength));
mm_log((1,"Colour map depth: %d\n",header.colourmapdepth));
mm_log((1,"X origin: %d\n",header.x_origin));
mm_log((1,"Y origin: %d\n",header.y_origin));
mm_log((1,"Width: %d\n",header.width));
mm_log((1,"Height: %d\n",header.height));
mm_log((1,"Bits per pixel: %d\n",header.bitsperpixel));
mm_log((1,"Descriptor: %d\n",header.imagedescriptor));
if (header.idlength) {
/* max of 256, so this is safe */
idstring = mymalloc(header.idlength+1);
if (i_io_read(ig, idstring, header.idlength) != header.idlength) {
i_push_error(errno, "short read on targa idstring");
return NULL;
}
}
width = header.width;
height = header.height;
/* Set tags here */
switch (header.datatypecode) {
case 0: /* No data in image */
i_push_error(0, "Targa image contains no image data");
if (idstring) myfree(idstring);
return NULL;
break;
case 1: /* Uncompressed, color-mapped images */
case 9: /* Compressed, color-mapped images */
case 3: /* Uncompressed, grayscale images */
case 11: /* Compressed, grayscale images */
if (header.bitsperpixel != 8) {
i_push_error(0, "Targa: mapped/grayscale image's bpp is not 8, unsupported.");
if (idstring) myfree(idstring);
return NULL;
}
src.bytepp = 1;
break;
case 2: /* Uncompressed, rgb images */
case 10: /* Compressed, rgb images */
if ((src.bytepp = bpp_to_bytes(header.bitsperpixel)))
break;
i_push_error(0, "Targa: direct color image's bpp is not 15/16/24/32 - unsupported.");
if (idstring) myfree(idstring);
return NULL;
break;
case 32: /* Compressed color-mapped, Huffman, Delta and runlength */
case 33: /* Compressed color-mapped, Huffman, Delta and runlength */
i_push_error(0, "Unsupported Targa (Huffman/delta/rle/quadtree) subformat is not supported");
if (idstring) myfree(idstring);
return NULL;
break;
default: /* All others which we don't know which might be */
i_push_error(0, "Unknown targa format");
if (idstring) myfree(idstring);
return NULL;
break;
}
src.state = NoInit;
src.len = 0;
src.ig = ig;
src.compressed = !!(header.datatypecode & (1<<3));
/* Determine number of channels */
mapped = 1;
switch (header.datatypecode) {
case 2: /* Uncompressed, rgb images */
case 10: /* Compressed, rgb images */
mapped = 0;
case 1: /* Uncompressed, color-mapped images */
case 9: /* Compressed, color-mapped images */
if ((channels = bpp_to_channels(mapped ?
header.colourmapdepth :
header.bitsperpixel,
header.imagedescriptor & 0xF))) break;
i_push_error(0, "Targa Image has none of 15/16/24/32 pixel layout");
if (idstring) myfree(idstring);
return NULL;
break;
case 3: /* Uncompressed, grayscale images */
case 11: /* Compressed, grayscale images */
mapped = 0;
channels = 1;
break;
default:
i_push_error(0, "invalid or unsupported datatype code");
return NULL;
}
if (!i_int_check_image_file_limits(width, height, channels,
sizeof(i_sample_t))) {
mm_log((1, "i_readtga_wiol: image size exceeds limits\n"));
return NULL;
}
img = mapped ?
i_img_pal_new(width, height, channels, 256) :
i_img_empty_ch(NULL, width, height, channels);
if (!img) {
if (idstring)
myfree(idstring);
return NULL;
}
if (idstring) {
i_tags_add(&img->tags, "tga_idstring", 0, idstring, header.idlength, 0);
myfree(idstring);
}
if (mapped &&
!tga_palette_read(ig,
img,
bpp_to_bytes(header.colourmapdepth),
header.colourmaplength)
) {
i_push_error(0, "Targa Image has none of 15/16/24/32 pixel layout");
if (idstring) myfree(idstring);
if (img) i_img_destroy(img);
return NULL;
}
/* Allocate buffers */
/* width is max 0xffff, src.bytepp is max 4, so this is safe */
databuf = mymalloc(width*src.bytepp);
/* similarly here */
if (!mapped) linebuf = mymalloc(width*sizeof(i_color));
for(y=0; y<height; y++) {
if (!tga_source_read(&src, databuf, width)) {
i_push_error(errno, "read for targa data failed");
if (linebuf) myfree(linebuf);
myfree(databuf);
if (img) i_img_destroy(img);
return NULL;
}
if (mapped && header.colourmaporigin) for(x=0; x<width; x++) databuf[x] -= header.colourmaporigin;
if (mapped) i_ppal(img, 0, width, header.imagedescriptor & (1<<5) ? y : height-1-y, databuf);
else {
for(x=0; x<width; x++) color_unpack(databuf+x*src.bytepp, src.bytepp, linebuf+x);
i_plin(img, 0, width, header.imagedescriptor & (1<<5) ? y : height-1-y, linebuf);
}
}
myfree(databuf);
if (linebuf) myfree(linebuf);
i_tags_add(&img->tags, "i_format", 0, "tga", -1, 0);
i_tags_addn(&img->tags, "tga_bitspp", 0, mapped?header.colourmapdepth:header.bitsperpixel);
if (src.compressed) i_tags_addn(&img->tags, "compressed", 0, 1);
return img;
}
/*
=item i_writetga_wiol(img, ig)
Writes an image in targa format. Returns 0 on error.
img - image to store
ig - io_glue object
=cut
*/
undef_int
i_writetga_wiol(i_img *img, io_glue *ig, int wierdpack, int compress, char *idstring, size_t idlen) {
tga_header header;
tga_dest dest;
unsigned char headbuf[18];
unsigned int bitspp;
unsigned int attr_bits = 0;
int mapped;
/* parameters */
/*
int compress = 1;
char *idstring = "testing";
int wierdpack = 0;
*/
idlen = strlen(idstring);
mapped = img->type == i_palette_type;
mm_log((1,"i_writetga_wiol(img %p, ig %p, idstring %p, idlen %ld, wierdpack %d, compress %d)\n",
img, ig, idstring, (long)idlen, wierdpack, compress));
mm_log((1, "virtual %d, paletted %d\n", img->virtual, mapped));
mm_log((1, "channels %d\n", img->channels));
i_clear_error();
if (img->xsize > TGA_MAX_DIM || img->ysize > TGA_MAX_DIM) {
i_push_error(0, "image too large for TGA");
return 0;
}
switch (img->channels) {
case 1:
bitspp = 8;
if (wierdpack) {
mm_log((1,"wierdpack option ignored for 1 channel images\n"));
wierdpack=0;
}
break;
case 2:
i_push_error(0, "Cannot store 2 channel image in targa format");
return 0;
break;
case 3:
bitspp = wierdpack ? 15 : 24;
break;
case 4:
bitspp = wierdpack ? 16 : 32;
attr_bits = wierdpack ? 1 : 8;
break;
default:
i_push_error(0, "Targa only handles 1,3 and 4 channel images.");
return 0;
}
header.idlength = idlen;
header.colourmaptype = mapped ? 1 : 0;
header.datatypecode = mapped ? 1 : img->channels == 1 ? 3 : 2;
header.datatypecode += compress ? 8 : 0;
mm_log((1, "datatypecode %d\n", header.datatypecode));
header.colourmaporigin = 0;
header.colourmaplength = mapped ? i_colorcount(img) : 0;
header.colourmapdepth = mapped ? bitspp : 0;
header.x_origin = 0;
header.y_origin = 0;
header.width = img->xsize;
header.height = img->ysize;
header.bitsperpixel = mapped ? 8 : bitspp;
header.imagedescriptor = (1<<5) | attr_bits; /* normal order instead of upside down */
tga_header_pack(&header, headbuf);
if (i_io_write(ig, &headbuf, sizeof(headbuf)) != sizeof(headbuf)) {
i_push_error(errno, "could not write targa header");
return 0;
}
if (idlen) {
if (i_io_write(ig, idstring, idlen) != idlen) {
i_push_error(errno, "could not write targa idstring");
return 0;
}
}
/* Make this into a constructor? */
dest.compressed = compress;
dest.bytepp = mapped ? 1 : bpp_to_bytes(bitspp);
dest.ig = ig;
mm_log((1, "dest.compressed = %d\n", dest.compressed));
mm_log((1, "dest.bytepp = %d\n", dest.bytepp));
if (img->type == i_palette_type) {
if (!tga_palette_write(ig, img, bitspp, i_colorcount(img))) return 0;
if (!img->virtual && !dest.compressed) {
if (i_io_write(ig, img->idata, img->bytes) != img->bytes) {
i_push_error(errno, "could not write targa image data");
return 0;
}
} else {
int y;
i_palidx *vals = mymalloc(sizeof(i_palidx)*img->xsize);
for(y=0; y<img->ysize; y++) {
i_gpal(img, 0, img->xsize, y, vals);
tga_dest_write(&dest, vals, img->xsize);
}
myfree(vals);
}
} else { /* direct type */
int x, y;
size_t bytepp = wierdpack ? 2 : bpp_to_bytes(bitspp);
size_t lsize = bytepp * img->xsize;
i_color *vals = mymalloc(img->xsize*sizeof(i_color));
unsigned char *buf = mymalloc(lsize);
for(y=0; y<img->ysize; y++) {
i_glin(img, 0, img->xsize, y, vals);
for(x=0; x<img->xsize; x++) color_pack(buf+x*bytepp, bitspp, vals+x);
tga_dest_write(&dest, buf, img->xsize);
}
myfree(buf);
myfree(vals);
}
if (i_io_close(ig))
return 0;
return 1;
}
/*
=back
=head1 AUTHOR
Arnar M. Hrafnkelsson <addi@umich.edu>
=head1 SEE ALSO
Imager(3)
=cut
*/
Jump to Line
Something went wrong with that request. Please try again.