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Optimize image channel detection

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Speeds up compression
This commit is contained in:
Juan Linietsky 2021-03-26 15:14:12 -03:00
parent 2bd89ac249
commit 4763835c11
1 changed files with 20 additions and 18 deletions
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38
core/io/image.cpp
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@ -3010,26 +3010,28 @@ Image::UsedChannels Image::detect_used_channels(CompressSource p_source) {
ERR_FAIL_COND_V(is_compressed(), USED_CHANNELS_RGBA);
bool r = false, g = false, b = false, a = false, c = false;
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
Color col = get_pixel(i, j);
const uint8_t *data_ptr = data.ptr();
if (col.r > 0.001) {
r = true;
}
if (col.g > 0.001) {
g = true;
}
if (col.b > 0.001) {
b = true;
}
if (col.a < 0.999) {
a = true;
}
uint32_t data_total = width * height;
if (col.r != col.b || col.r != col.g || col.b != col.g) {
c = true;
}
for (uint32_t i = 0; i < data_total; i++) {
Color col = _get_color_at_ofs(data_ptr, i);
if (col.r > 0.001) {
r = true;
}
if (col.g > 0.001) {
g = true;
}
if (col.b > 0.001) {
b = true;
}
if (col.a < 0.999) {
a = true;
}
if (col.r != col.b || col.r != col.g || col.b != col.g) {
c = true;
}
}