forks
/
arsd
mirror of https://github.com/adamdruppe/arsd.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

lol

This commit is contained in:
Adam D. Ruppe 2019-01-06 17:28:34 -05:00
parent 08efa61c7d
commit e2e8a917e5
1 changed files with 29 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
png.d
View File

@ -25,17 +25,19 @@ void writePng(string filename, MemoryImage mi) {
/// ///
enum PngType { enum PngType {
greyscale = 0, /// The data must be `depth` bits per pixel greyscale = 0, /// The data must be `depth` bits per pixel
truecolor = 2, /// The data will be RGB triples, so `depth * 3` bits per pixel truecolor = 2, /// The data will be RGB triples, so `depth * 3` bits per pixel. Depth must be 8 or 16.
indexed = 3, /// The data must be `depth` bits per pixel, with a palette attached. Use [writePng] with [IndexedImage] for this mode indexed = 3, /// The data must be `depth` bits per pixel, with a palette attached. Use [writePng] with [IndexedImage] for this mode. Depth must be <= 8.
greyscale_with_alpha = 4, /// The data must be (grey, alpha) byte pairs for each pixel. Thus `depth * 2` bits per pixel greyscale_with_alpha = 4, /// The data must be (grey, alpha) byte pairs for each pixel. Thus `depth * 2` bits per pixel. Depth must be 8 or 16.
truecolor_with_alpha = 6 /// The data must be RGBA quads for each pixel. Thus, `depth * 4` bits per pixel. truecolor_with_alpha = 6 /// The data must be RGBA quads for each pixel. Thus, `depth * 4` bits per pixel. Depth must be 8 or 16.
} }
/// Saves an image from an existing array. Note that depth other than 8 may not be implemented yet. /// Saves an image from an existing array. Note that depth other than 8 may not be implemented yet. Also note depth of 16 must be stored big endian
void writePng(string filename, const ubyte[] data, int width, int height, PngType type, ubyte depth = 8) { void writePng(string filename, const ubyte[] data, int width, int height, PngType type, ubyte depth = 8) {
PngHeader h; PngHeader h;
h.width = width; h.width = width;
h.height = height; h.height = height;
h.type = cast(ubyte) type;
h.depth = depth;
auto png = blankPNG(h); auto png = blankPNG(h);
addImageDatastreamToPng(data, png); addImageDatastreamToPng(data, png);
@ -652,9 +654,28 @@ void addImageDatastreamToPng(const(ubyte)[] data, PNG* png) {
PngHeader h = getHeader(png); PngHeader h = getHeader(png);
auto bytesPerLine = h.width * 4; int bytesPerLine;
if(h.type == 3) switch(h.type) {
bytesPerLine = h.width * h.depth / 8; case 0:
// FIXME: < 8 depth not supported here but should be
bytesPerLine = h.width * 1 * h.depth / 8;
break;
case 2:
bytesPerLine = h.width * 3 * h.depth / 8;
break;
case 3:
bytesPerLine = h.width * 1 * h.depth / 8;
break;
case 4:
// FIXME: < 8 depth not supported here but should be
bytesPerLine = h.width * 2 * h.depth / 8;
break;
case 6:
bytesPerLine = h.width * 4 * h.depth / 8;
break;
default: assert(0);
}
Chunk dat; Chunk dat;
dat.type = ['I', 'D', 'A', 'T']; dat.type = ['I', 'D', 'A', 'T'];
int pos = 0; int pos = 0;