YUMEALIGN16 void window::draw_triangle(const triangle& src) {
triangle t = src;
t.points[0] = translate(t.points[0]);
t.points[1] = translate(t.points[1]);
t.points[2] = translate(t.points[2]);
std::sort(t.points.begin(), t.points.end(), ysort);
float dP1P2 = 0.0f, dP1P3 = 0.0f; // Inverse slopes.
if (t.points[1].y() - t.points[0].y() > 0.0f)
dP1P2 = (t.points[1].x() - t.points[0].x()) / (t.points[1].y() - t.points[0].y());
if (t.points[2].y() - t.points[0].y() > 0.0f)
dP1P3 = (t.points[2].x() - t.points[0].x()) / (t.points[2].y() - t.points[0].y());
if (dP1P2 > dP1P3) {
for (auto y = static_cast<int>(t.points[0].y()); y <= static_cast<int>(t.points[2].y()); ++y) {
if (y < t.points[1].y()) {
process_scanline(y, t.points[0], t.points[2], t.points[0], t.points[1]);
} else {
process_scanline(y, t.points[0], t.points[2], t.points[1], t.points[2]);
}
}
} else {
for (auto y = static_cast<int>(t.points[0].y()); y <= static_cast<int>(t.points[2].y()); ++y) {
if (y < t.points[1].y()) {
process_scanline(y, t.points[0], t.points[1], t.points[0], t.points[2]);
} else {
process_scanline(y, t.points[1], t.points[2], t.points[0], t.points[2]);
}
}
}
}
/*
* Collects extents from all scanlines in a frame and stores them in
* the extent_line array el.
*/
static void process_frame(uint8_t *lines, int width, int height,
struct extent_line *el, struct blobservation *ob)
{
struct extent_line *last_el;
int index = 0;
int y;
ob->num_blobs = 0;
index = process_scanline(lines, width, height, 0, el, NULL, 0, ob);
for (y = 1; y < height; y++) {
last_el = el++;
lines += width;
index = process_scanline(lines, width, height, y, el, last_el,
index, ob);
}
ob->num_blobs = min(MAX_BLOBS_PER_FRAME, index);
}
void decompress(FILE *fp, FILE *fout) {
int row_stride;
struct jpeg_error_mgr jerr;
struct jpeg_decompress_struct jpg;
JSAMPARRAY buffer;
Image image;
jpg.err = jpeg_std_error(&jerr);
jpeg_create_decompress(&jpg);
jpeg_stdio_src(&jpg, fp);
jpeg_read_header(&jpg, TRUE);
jpeg_start_decompress(&jpg);
if ( jpg.data_precision != 8 ) {
fprintf(stderr,
"Image has %d bits color channels, we only support 8-bit.\n",
jpg.data_precision);
exit(1);
}
row_stride = jpg.output_width * jpg.output_components;
buffer = (*jpg.mem->alloc_sarray)((j_common_ptr) &jpg, JPOOL_IMAGE, row_stride, 1);
aspect_ratio(jpg.output_width, jpg.output_height);
malloc_image(&image);
clear(&image);
if ( verbose ) print_info(&jpg);
init_image(&image, &jpg);
while ( jpg.output_scanline < jpg.output_height ) {
jpeg_read_scanlines(&jpg, buffer, 1);
process_scanline(&jpg, buffer[0], &image);
if ( verbose ) print_progress(&jpg);
}
if ( verbose ) {
fprintf(stderr, "\n");
fflush(stderr);
}
normalize(&image);
if ( clearscr ) {
fprintf(fout, "%c[2J", 27); // ansi code for clear
fprintf(fout, "%c[0;0H", 27); // move to upper left
}
if ( html && !html_rawoutput ) print_html_start(html_fontsize, fout);
if ( use_border ) print_border(image.width);
(!usecolors? print_image : print_image_colors) (&image, (int) strlen(ascii_palette) - 1, fout);
if ( use_border ) print_border(image.width);
if ( html && !html_rawoutput ) print_html_end(fout);
free_image(&image);
jpeg_finish_decompress(&jpg);
jpeg_destroy_decompress(&jpg);
}
