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author | rodri <rgl@antares-labs.eu> | 2020-02-15 09:41:35 +0000 |
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committer | rodri <rgl@antares-labs.eu> | 2020-02-15 09:41:35 +0000 |
commit | 5a3198e108fc868da57a002abaca9a4db28d096b (patch) | |
tree | 004bbc9743f430c7089df580eb86c8c9d6b2e840 /main.c | |
download | gbadev-5a3198e108fc868da57a002abaca9a4db28d096b.tar.gz gbadev-5a3198e108fc868da57a002abaca9a4db28d096b.tar.bz2 gbadev-5a3198e108fc868da57a002abaca9a4db28d096b.zip |
initial rom with basic gradient.
Diffstat (limited to 'main.c')
-rw-r--r-- | main.c | 43 |
1 files changed, 43 insertions, 0 deletions
@@ -0,0 +1,43 @@ +#include "dat.h" +#include "regs.h" + +uint *ioram = (uint*)IORAM; +ushort *vram = (ushort*)VRAM; + +Point +Pt(int x, int y) +{ + return (Point){x,y}; +} + +ushort +rgb(int r, int g, int b) +{ + ushort c; + + c = 0; + c |= (r&0x1f)<<10; + c |= (g&0x1f)<<5; + c |= b&0x1f; + return c; +} + +void +drawpixel(Point p, ushort col) +{ + vram[p.x+p.y*SCRW] = col; +} + +int +main() +{ + int i, c; + + *ioram = 0x0403; + for(i = 0; i < SCRH; i++){ + c = 31*i/SCRH; + drawpixel(Pt(i,i), rgb(c,c,c)); + } + for(;;); + return 0; +} |