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fix tic_modulo (#2676)
* use modulus to loop map
* use tic_modulo in drawMap
* fix tic_modulo for large negative values
authored by
Matt Zykan
and committed by
GitHub
794ee52b
e62e8922
+6
-11
+2
-7
src/core/draw.c
+2
-7
src/core/draw.c
···
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for (s32 j = y, jj = sy; j < y + height; j++, jj += size)
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for (s32 i = x, ii = sx; i < x + width; i++, ii += size)
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{
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s32 mi = i;
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s32 mj = j;
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-
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while (mi < 0) mi += TIC_MAP_WIDTH;
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while (mj < 0) mj += TIC_MAP_HEIGHT;
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while (mi >= TIC_MAP_WIDTH) mi -= TIC_MAP_WIDTH;
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while (mj >= TIC_MAP_HEIGHT) mj -= TIC_MAP_HEIGHT;
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s32 mi = tic_modulo(i, TIC_MAP_WIDTH);
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s32 mj = tic_modulo(j, TIC_MAP_HEIGHT);
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s32 index = mi + mj * TIC_MAP_WIDTH;
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RemapResult retile = { *(src->data + index), tic_no_flip, tic_no_rotate };
+4
-4
src/tools.h
+4
-4
src/tools.h
···
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inline s32 tic_modulo(s32 x, s32 m)
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{
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if(x >= m) return x % m;
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if(x < 0) return x % m + m;
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return x;
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s32 r = x % m;
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if (r < 0)
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r += m;
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return r;
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}
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tic_blitpal tic_tool_palette_blit(const tic_palette* src, tic80_pixel_color_format fmt);