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r61524: improve mono emulation with centering and a border

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This reaches 7.5 ms so nothing to add there.
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Lephe 2024-03-23 23:21:32 +01:00
parent 5548bf68ab
commit ee109e4977
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GPG key ID: 1BBA026E13FC0495
1 changed files with 66 additions and 8 deletions
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68
src/r61524/r61524.c
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@ -202,21 +202,79 @@ void r61524_display_rect(uint16_t *vram, int xmin, int xmax, int ymin,
void r61524_display_mono_128x64(uint32_t *vram)
{
dma_transfer_wait(0);
r61524_start_frame(0, 383, 0, 191);
r61524_start_frame(0, 395, 0, 223);
int border = 0xe71c; /* C_RGB(28, 28, 28) */
for(int i = 0; i < 16 * 396; i++)
write(border);
for(int y = 0; y < 64; y++) {
/* sub-y position */
for(int sy = 0; sy < 3; sy++) {
/* Get pixels manually, ooh, slow */
for(int x = 0; x < 128; x++) {
int pixel = vram[x >> 5] >> (~x & 31);
int color = (pixel & 1) ? 0x0000 : 0xffff;
for(int i = 0; i < 6; i++)
write(border);
/* longword-x position */
for(int lwx = 0; lwx < 4; lwx++) {
int32_t i = vram[lwx];
/* sub-x position */
for(int sx = 0; sx < 32; sx++) {
int color = ~(i >> 31);
i <<= 1;
write(color);
write(color);
write(color);
}
}
for(int i = 0; i < 6; i++)
write(border);
}
vram += 4;
}
for(int i = 0; i < 16 * 396; i++)
write(border);
}
void r61524_display_gray_128x64(uint32_t *vram)
{
dma_transfer_wait(0);
r61524_start_frame(0, 395, 0, 223);
int border = 0xe71c; /* C_RGB(28, 28, 28) */
for(int i = 0; i < 16 * 396; i++)
write(border);
for(int y = 0; y < 64; y++) {
/* sub-y position */
for(int sy = 0; sy < 3; sy++) {
for(int i = 0; i < 6; i++)
write(border);
/* longword-x position */
for(int lwx = 0; lwx < 4; lwx++) {
int32_t i = vram[lwx];
/* sub-x position */
for(int sx = 0; sx < 32; sx++) {
int color = ~(i >> 31);
i <<= 1;
write(color);
write(color);
write(color);
}
}
for(int i = 0; i < 6; i++)
write(border);
}
vram += 4;
}
for(int i = 0; i < 16 * 396; i++)
write(border);
}
//---