44 lines
1006 B
C++
44 lines
1006 B
C++
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#include <cstdint>
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void S9xForceHires(void *buffer, int pitch, int &width, int &height)
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{
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if (width <= 256)
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{
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for (int y = (height)-1; y >= 0; y--)
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{
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uint16_t *line = (uint16_t *)((uint8_t *)buffer + y * pitch);
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for (int x = (width * 2) - 1; x >= 0; x--)
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{
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*(line + x) = *(line + (x >> 1));
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}
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}
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width *= 2;
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}
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}
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static inline uint16_t average_565(uint16_t colora, uint16_t colorb)
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{
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return (((colora) & (colorb)) + ((((colora) ^ (colorb)) & 0xF7DE) >> 1));
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}
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void S9xMergeHires(void *buffer, int pitch, int &width, int &height)
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{
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if (width < 512)
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return;
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for (int y = 0; y < height; y++)
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{
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uint16_t *input = (uint16_t *)((uint8_t *)buffer + y * pitch);
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uint16_t *output = input;
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for (int x = 0; x < (width >> 1); x++)
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{
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*output++ = average_565(input[0], input[1]);
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input += 2;
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}
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}
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width >>= 1;
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}
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