mirror of https://github.com/bsnes-emu/bsnes.git
54 lines
1.5 KiB
C++
Executable File
54 lines
1.5 KiB
C++
Executable File
#include "scale2x.hpp"
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void Scale2xFilter::size(unsigned &outwidth, unsigned &outheight, unsigned width, unsigned height) {
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if(width > 256 || height > 240) return filter_direct.size(outwidth, outheight, width, height);
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outwidth = width * 2;
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outheight = height * 2;
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}
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void Scale2xFilter::render(
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uint32_t *output, unsigned outpitch,
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const uint16_t *input, unsigned pitch, unsigned width, unsigned height
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) {
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if(width > 256 || height > 240) {
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filter_direct.render(output, outpitch, input, pitch, width, height);
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return;
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}
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pitch >>= 1;
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outpitch >>= 2;
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uint32_t *out0 = output;
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uint32_t *out1 = output + outpitch;
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for(unsigned y = 0; y < height; y++) {
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int prevline = (y == 0 ? 0 : pitch);
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int nextline = (y == height - 1 ? 0 : pitch);
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for(unsigned x = 0; x < width; x++) {
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uint16_t A = *(input - prevline);
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uint16_t B = (x > 0) ? *(input - 1) : *input;
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uint16_t C = *input;
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uint16_t D = (x < 255) ? *(input + 1) : *input;
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uint16_t E = *(input++ + nextline);
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uint32_t c = colortable[C];
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if(A != E && B != D) {
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*out0++ = (A == B ? colortable[A] : c);
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*out0++ = (A == D ? colortable[A] : c);
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*out1++ = (E == B ? colortable[E] : c);
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*out1++ = (E == D ? colortable[E] : c);
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} else {
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*out0++ = c;
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*out0++ = c;
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*out1++ = c;
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*out1++ = c;
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}
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}
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input += pitch - width;
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out0 += outpitch + outpitch - 512;
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out1 += outpitch + outpitch - 512;
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}
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}
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