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Comments (3)

bbbbbr avatar bbbbbr commented on May 26, 2024

Can you summarize the suggestion? Is it to use the single source file hqx?

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zvezdochiot avatar zvezdochiot commented on May 26, 2024

@bbbbbr say:

Is it to use the single source file hqx?

Header for all scaler:

PS:

gimp-plugin-pixel-art-scalers/src/hqx_init.c

Lines 22 to 38 in 2c79cf2

uint32_t RGBtoYUV[16777216]; // TODO: can this be shared between HQX & XBR? ~16MB of lookup table
uint32_t YUV1, YUV2;
void hqxInit(void)
{
/* Initalize RGB to YUV lookup table */
uint32_t c, r, g, b, y, u, v;
for (c = 0; c < 16777215; c++) {
r = (c & 0xFF0000) >> 16;
g = (c & 0x00FF00) >> 8;
b = c & 0x0000FF;
y = (uint32_t)(0.299*r + 0.587*g + 0.114*b);
u = (uint32_t)(-0.169*r - 0.331*g + 0.5*b) + 128;
v = (uint32_t)(0.5*r - 0.419*g - 0.081*b) + 128;
RGBtoYUV[c] = (y << 16) + (u << 8) + v;
}
}

⚠ī¸ Init is completely unnecessary. It only slows down and eats away memory.

ℹī¸ See also:

from gimp-plugin-pixel-art-scalers.

zvezdochiot avatar zvezdochiot commented on May 26, 2024

Overdue.

from gimp-plugin-pixel-art-scalers.

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