dan/TIC-80-guile
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Update two pixels at once.

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This commit is contained in:
František Jahoda
2017-12-04 23:25:34 +01:00
parent 86a320e9ad
commit 2bb436eac6
1 changed files with 11 additions and 7 deletions
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18
src/tic.c
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@@ -1722,18 +1722,22 @@ static void api_blit(tic_mem* tic, tic_scanline scanline, tic_overlap overlap, v
memset4(&out[0 * TIC80_FULLWIDTH], pal[tic->ram.vram.vars.border], TIC80_FULLWIDTH*Top);
u32* rowPtr = out + (Top*TIC80_FULLWIDTH);
u32* colPtr = rowPtr + Left;
for(s32 r = 0; r < TIC80_HEIGHT; r++, rowPtr += TIC80_FULLWIDTH, colPtr += (Left + Right))
for(s32 r = 0; r < TIC80_HEIGHT; r++, rowPtr += TIC80_FULLWIDTH)
{
u32 *colPtr = rowPtr + Left;
memset4(rowPtr, pal[tic->ram.vram.vars.border], Left);
s32 pos = (r + tic->ram.vram.vars.offset.y + TIC80_HEIGHT) % TIC80_HEIGHT * TIC80_WIDTH;
s32 pos = (r + tic->ram.vram.vars.offset.y + TIC80_HEIGHT) % TIC80_HEIGHT * TIC80_WIDTH >> 1;
for(s32 c = 0, x = (tic->ram.vram.vars.offset.x + TIC80_WIDTH) % TIC80_WIDTH; c < TIC80_WIDTH; c++, colPtr++, x++)
u32 *endRow = colPtr + TIC80_WIDTH;
colPtr += (-tic->ram.vram.vars.offset.x + TIC80_WIDTH) % TIC80_WIDTH;
for(s32 c = 0; c < TIC80_WIDTH / 2; c++)
{
if(x >= TIC80_WIDTH) x %= TIC80_WIDTH;
*colPtr = pal[tic_tool_peek4(tic->ram.vram.screen.data, pos + x)];
u8 val = ((u8*)tic->ram.vram.screen.data)[pos + c];
*colPtr++ = pal[val & 0xf];
if(colPtr >= endRow) colPtr -= TIC80_WIDTH;
*colPtr++ = pal[val >> 4];
if(colPtr >= endRow) colPtr -= TIC80_WIDTH;
}
memset4(rowPtr + (TIC80_FULLWIDTH-Right), pal[tic->ram.vram.vars.border], Right);