+/*
+=item bpp_to_bytes(bpp)
+
+Convert bits per pixel into bytes per pixel
+
+ bpp - bits per pixel
+
+=cut
+*/
+
+
static
int
bpp_to_bytes(unsigned int bpp) {
return 0;
}
+
+
+/*
+=item bpp_to_channels(bpp)
+
+Convert bits per pixel into channels in the image
+
+ bpp - bits per pixel
+
+=cut
+*/
+
static
int
bpp_to_channels(unsigned int bpp) {
/*
* 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.
-/* color_unpack
+ buf - pointer to data
+ bytepp - bytes per pixel
+ val - pointer to color to store to
-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.
+=cut
*/
static
-/* color_pack
+/*
+=item color_pack
-Packs colous into bytes, for 2 byte type the first byte will be
-GGGBBBBB, and the second will be ARRRRRGG. "A" represents an
+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
break;
default:
}
- // printf("%d %3d %3d %3d\n", bitspp, val->rgb.r, val->rgb.g, val->rgb.b);
}
+/*
+=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
}
+/*
+=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) {
}
+/*
+=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];
+}
+
+
+/*
+=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_dest_write
-
- Note that it is possible for length to be more than 0 and the state
- still be noinit. That just means that there isn't enough data yet to
- determine the next packet type.
+/*
+=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
+/*
+=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
}
+/*
+=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
return 1;
}
-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];
-}
-
-
-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 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
+/*
+=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) {
+i_writetga_wiol(i_img *img, io_glue *ig, int wierdpack, int compress, char *idstring, size_t idlen) {
static int rgb_chan[] = { 2, 1, 0, 3 };
tga_header header;
tga_dest dest;
// unsigned char *data;
unsigned int bitspp;
- int idlen;
int mapped;
/* parameters */
- int compress = 1;
- char *idstring = "testing";
- int wierdpack = 0;
+
+ /*
+ 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)\n", img, ig));
+ mm_log((1,"i_writetga_wiol(img %p, ig %p, idstring %p, idlen %d, wierdpack %d, compress %d)\n",
+ img, ig, idstring, idlen, wierdpack, compress));
mm_log((1, "virtual %d, paletted %d\n", img->virtual, mapped));
mm_log((1, "channels %d\n", img->channels));
projects / imager.git / commitdiff