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zrle: Fix run-length encoding with palette

tight-png
Andri Yngvason 2019-09-05 23:36:00 +00:00 committed by Andri Yngvason
parent 3e374c97f0
commit fb335247aa
1 changed files with 10 additions and 15 deletions
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23
src/zrle.c
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@ -192,7 +192,7 @@ void zrle_encode_unichrome_tile(struct vec *dst,
dst->len += bytes_per_cpixel;
}
void encode_run_length(struct vec *dst, int index, int run_length)
void encode_run_length(struct vec *dst, uint8_t index, int run_length)
{
if (run_length == 1) {
vec_fast_append_8(dst, index);
@ -222,33 +222,28 @@ void zrle_encode_packed_tile(struct vec *dst,
pixel32_to_cpixel((uint8_t*)cpalette, dst_fmt, palette,
src_fmt, bytes_per_cpixel, palette_size);
vec_fast_append_8(dst, 128 + palette_size);
vec_fast_append_8(dst, 128 | palette_size);
vec_append(dst, cpalette, palette_size * bytes_per_cpixel);
int index;
int run_length = -1;
uint32_t old_colour = src[0];
int run_length = 1;
for (size_t i = 0; i < length; ++i) {
uint32_t colour = src[i];
for (size_t i = 1; i < length; ++i) {
if (src[i] == src[i - 1]) {
run_length++;
if (colour == old_colour)
continue;
}
index = find_colour_in_palette(palette, palette_size,
old_colour);
src[i - 1]);
encode_run_length(dst, index, run_length);
old_colour = colour;
run_length = 0;
run_length = 1;
}
if (run_length > 0) {
index = find_colour_in_palette(palette, palette_size,
old_colour);
src[length - 1]);
encode_run_length(dst, index, run_length);
}
}