input_impl ( tu_file *in )
:
m_compressor_opened ( false )
// Constructor. Read the header data from in, and
// prepare to read data.
{
setup_jpeg_err ( &m_jerr );
m_cinfo.err = &m_jerr;
// Initialize decompression object.
jpeg_create_decompress ( &m_cinfo );
setup_rw_source ( &m_cinfo, in );
start_image();
}
RImage *bilinear (int argc, char **argv, int width, int height,
int relief) {
int color[4][3];
RImage *image;
unsigned char *cptr;
int i, j, k;
argc--;
argv++;
if (!start_image ("bilinear", argc, 4, 5, width, height, &image)) {
return (RImage *)0;
}
for (i=0; i<4; i++) {
if (!parse_color (argv[i], color[i])) {
error ("can't parse color: \"%s\"\n", argv[i]);
return 0;
}
}
cptr = image->data;
for (i=0; i<height; i++) {
int b = 0xff * i / height;
int t = 0xff - b;
for (j=0; j<width; j++) {
int r = 0xff * j / width;
int l = 0xff - r;
int f[4];
f[0] = (l*t) >> 8;
f[1] = (r*t) >> 8;
f[2] = (l*b) >> 8;
f[3] = (r*b) >> 8;
for (k=0; k<3; k++) {
*cptr++ =
( f[0] * color[0][k] +
f[1] * color[1][k] +
f[2] * color[2][k] +
f[3] * color[3][k] ) >> 8;
}
if (RRGBAFormat==image->format)
cptr++;
}
}
return image;
}
static void update_scroll(struct mb_display *disp)
{
if (disp->scroll < scroll_steps(disp)) {
struct mb_image img;
int i;
for (i = 0; i < 5; i++) {
const struct mb_image *i1 = current_img(disp);
const struct mb_image *i2 = next_img(disp);
img.row[i] = ((i1->row[i] >> disp->scroll) |
(i2->row[i] << (scroll_steps(disp) -
disp->scroll)));
}
disp->scroll++;
start_image(disp, &img);
} else {
if (disp->first) {
