-#include "image.h"
-#include "io.h"
+#include "imageri.h"
#include "log.h"
#include "iolayer.h"
Some of these functions are internal.
-=over 4
+=over
=cut
*/
typedef struct {
- char idlength;
+ unsigned char idlength;
char colourmaptype;
char datatypecode;
short int colourmaporigin;
char colourmapdepth;
short int x_origin;
short int y_origin;
- short width;
- short height;
+ int width;
+ int height;
char bitsperpixel;
char imagedescriptor;
} tga_header;
+typedef enum { NoInit, Raw, Rle } rle_state;
+
typedef struct {
int compressed;
- int bytepp;
- enum { NoInit, Raw, Rle } state;
+ size_t bytepp;
+ rle_state state;
unsigned char cval[4];
int len;
unsigned char hdr;
} 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
-int
+size_t
bpp_to_bytes(unsigned int bpp) {
switch (bpp) {
case 8:
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) {
+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 16:
- return 4;
+ case 32:
+ if (attr_bit_count == 8)
+ return 4;
case 24:
return 3;
- case 32:
- return 4;
}
return 0;
}
-/* color_unpack
+/*
+ * 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.
-Unpacks bytes into colours, 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
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);
+ 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->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;
}
-/*
- tga_source_read
-
- Does not byte reorder, returns true on success, 0 otherwise
+
+/*
+=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
tga_source_read(tga_source *s, unsigned char *buf, size_t pixels) {
int cp = 0, j, k;
if (!s->compressed) {
- if (s->ig->readcb(s->ig, buf, pixels*s->bytepp) != pixels*s->bytepp) return 0;
+ if (i_io_read(s->ig, buf, pixels*s->bytepp) != pixels*s->bytepp) return 0;
return 1;
}
if (s->len == 0) s->state = NoInit;
switch (s->state) {
case NoInit:
- if (s->ig->readcb(s->ig, &s->hdr, 1) != 1) return 0;
+ 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;
- if (s->state == Rle && s->ig->readcb(s->ig, s->cval, s->bytepp) != s->bytepp) return 0;
+ {
+/*
+ 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 = min(s->len, pixels-cp);
+ 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];
- // memset(buf+cp, s->cidx, ml);
cp += ml;
s->len -= ml;
break;
case Raw:
- ml = min(s->len, pixels-cp);
- if (s->ig->readcb(s->ig, buf+cp*s->bytepp, ml*s->bytepp) != ml*s->bytepp) return 0;
+ 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) {
palbsize = colourmaplength*bytepp;
palbuf = mymalloc(palbsize);
- if (ig->readcb(ig, palbuf, palbsize) != palbsize) {
+ if (i_io_read(ig, palbuf, palbsize) != palbsize) {
i_push_error(errno, "could not read targa colourmap");
return 0;
}
}
+/*
+=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)
-Retrieve an image and stores in the iolayer object. Returns NULL on fatal error.
+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
i_img *
i_readtga_wiol(io_glue *ig, int length) {
- i_img* img;
- int x, y, i;
+ i_img* img = NULL;
+ int x, y;
int width, height, channels;
int mapped;
- char *idstring;
+ char *idstring = NULL;
tga_source src;
tga_header header;
unsigned char headbuf[18];
unsigned char *databuf;
- unsigned char *reorderbuf;
i_color *linebuf = NULL;
i_clear_error();
mm_log((1,"i_readtga(ig %p, length %d)\n", ig, length));
- io_glue_commit_types(ig);
-
- if (ig->readcb(ig, &headbuf, 18) != 18) {
+ if (i_io_read(ig, &headbuf, 18) != 18) {
i_push_error(errno, "could not read targa header");
return NULL;
}
- 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];
+ 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,"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 (ig->readcb(ig, idstring, header.idlength) != header.idlength) {
+ if (i_io_read(ig, idstring, header.idlength) != header.idlength) {
i_push_error(errno, "short read on targa idstring");
return NULL;
}
- myfree(idstring); /* Move this later, once this is stored in a tag */
}
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 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;
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;
}
mapped = 1;
switch (header.datatypecode) {
- int tbpp;
case 2: /* Uncompressed, rgb images */
case 10: /* Compressed, rgb images */
mapped = 0;
case 9: /* Compressed, color-mapped images */
if ((channels = bpp_to_channels(mapped ?
header.colourmapdepth :
- header.bitsperpixel))) break;
+ 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 */
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,
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;
}
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 rc;
- static int rgb_chan[] = { 2, 1, 0, 3 };
+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 char *data;
- int compress = 0;
- char *idstring = "testing";
- int idlen = strlen(idstring);
- int mapped = img->type == i_palette_type;
+ unsigned int bitspp;
+ unsigned int attr_bits = 0;
+
+ int mapped;
- mm_log((1,"i_writetga_wiol(img %p, ig %p)\n", img, ig));
- i_clear_error();
+ /* parameters */
+
+ /*
+ int compress = 1;
+ char *idstring = "testing";
+ int wierdpack = 0;
+ */
- io_glue_commit_types(ig);
+ 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;
header.idlength = idlen;
header.colourmaptype = mapped ? 1 : 0;
header.datatypecode = mapped ? 1 : img->channels == 1 ? 3 : 2;
- mm_log((1, "datatypecode %d\n", header.datatypecode));
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 ? img->channels*8 : 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 : 8*img->channels;
- header.imagedescriptor = (1<<5); /* normal order instead of upside down */
-
- 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;
-
- if (ig->writecb(ig, &headbuf, sizeof(headbuf)) != sizeof(headbuf)) {
+ 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 (ig->writecb(ig, idstring, idlen) != 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) {
- /* write palette */
- if (!img->virtual) {
- if (ig->writecb(ig, img->idata, img->bytes) != img->bytes) {
+ 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;
}
i_palidx *vals = mymalloc(sizeof(i_palidx)*img->xsize);
for(y=0; y<img->ysize; y++) {
i_gpal(img, 0, img->xsize, y, vals);
- if (ig->writecb(ig, vals, img->xsize) != img->xsize) {
- i_push_error(errno, "could not write targa data to file");
- myfree(vals);
- return 0;
- }
+ tga_dest_write(&dest, vals, img->xsize);
}
myfree(vals);
}
- } else {
- int y, lsize = img->channels * img->xsize;
- data = mymalloc(lsize);
+ } 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_gsamp(img, 0, img->xsize, y, data, rgb_chan, img->channels);
- if ( ig->writecb(ig, data, lsize) != lsize ) {
- i_push_error(errno, "could not write targa data to file");
- myfree(data);
- return 0;
- }
+ 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(data);
+ 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
+*/
projects / imager.git / blobdiff