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Load/store RGBA separately instead of using a typecast; close #197

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This should fix problems on big-endian machines and with ILP64
This commit is contained in:
Dominic Szablewski 2022-04-11 23:19:04 +02:00
parent 59e0575c49
commit e42b0b3022
1 changed files with 10 additions and 12 deletions
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22
qoi.h
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@ -424,13 +424,12 @@ void *qoi_encode(const void *data, const qoi_desc *desc, int *out_len) {
channels = desc->channels; channels = desc->channels;
for (px_pos = 0; px_pos < px_len; px_pos += channels) { for (px_pos = 0; px_pos < px_len; px_pos += channels) {
px.rgba.r = pixels[px_pos + 0];
px.rgba.g = pixels[px_pos + 1];
px.rgba.b = pixels[px_pos + 2];
if (channels == 4) { if (channels == 4) {
px = *(qoi_rgba_t *)(pixels + px_pos); px.rgba.a = pixels[px_pos + 3];
}
else {
px.rgba.r = pixels[px_pos + 0];
px.rgba.g = pixels[px_pos + 1];
px.rgba.b = pixels[px_pos + 2];
} }
if (px.v == px_prev.v) { if (px.v == px_prev.v) {
@ -598,13 +597,12 @@ void *qoi_decode(const void *data, int size, qoi_desc *desc, int channels) {
index[QOI_COLOR_HASH(px) % 64] = px; index[QOI_COLOR_HASH(px) % 64] = px;
} }
pixels[px_pos + 0] = px.rgba.r;
pixels[px_pos + 1] = px.rgba.g;
pixels[px_pos + 2] = px.rgba.b;
if (channels == 4) { if (channels == 4) {
*(qoi_rgba_t*)(pixels + px_pos) = px; pixels[px_pos + 3] = px.rgba.a;
}
else {
pixels[px_pos + 0] = px.rgba.r;
pixels[px_pos + 1] = px.rgba.g;
pixels[px_pos + 2] = px.rgba.b;
} }
} }