mirror of https://github.com/bsnes-emu/bsnes.git
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
#include "lq2x.hpp"
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void LQ2xFilter::size(unsigned &outwidth, unsigned &outheight, unsigned width, unsigned height) {
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if(height > 240) return filter_direct.size(outwidth, outheight, width, height);
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outwidth = (width <= 256) ? width * 2 : width;
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outheight = (height <= 240) ? height * 2 : height;
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}
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void LQ2xFilter::render(
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uint32_t *output, unsigned outpitch, const uint16_t *input, unsigned pitch,
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const unsigned *line, unsigned width, unsigned height
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) {
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if(height > 240) {
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filter_direct.render(output, outpitch, input, pitch, line, 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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unsigned linewidth = line[y];
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if(linewidth == 256) {
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int prevline = (y == 0) || (linewidth != line[y - 1]) ? 0 : pitch;
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int nextline = (y == height - 1) || (linewidth != line[y + 1]) ? 0 : pitch;
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for(unsigned x = 0; x < 256; 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[C + A - ((C ^ A) & 0x0421) >> 1] : c);
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*out0++ = (A == D ? colortable[C + A - ((C ^ A) & 0x0421) >> 1] : c);
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*out1++ = (E == B ? colortable[C + E - ((C ^ E) & 0x0421) >> 1] : c);
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*out1++ = (E == D ? colortable[C + E - ((C ^ E) & 0x0421) >> 1] : 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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} else {
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for(unsigned x = 0; x < 512; x++) {
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*out0++ = *out1++ = colortable[*input++];
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}
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}
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input += pitch - linewidth;
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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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