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Store pointers for indexed sprites for anything that's redrawn every frame.

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stevenhowes
2021-08-31 18:20:11 +01:00
parent afe572da82
commit 8002b764c5
5 changed files with 60 additions and 16 deletions
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!TheEsc/c/Graphics
+29
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@@ -132,6 +132,35 @@ void draw_rectangle(int x1,int y1,int x2,int y2)
draw_line(x2,y2,x1,y2);
}
int get_sprite_address(char* spritename)
{
inreg.r[0] = 256+24;
inreg.r[1] = (int) buffer;
inreg.r[2] = (int) spritename;
_kernel_swi(OS_SpriteOp,&inreg,&outreg);
if(outreg.r[2] == inreg.r[2])
outreg.r[2] = 0;
return outreg.r[2];
}
void draw_sprite_pointer(int pointer,int x, int y)
{
// Unable to look up address (or never tried)
if(pointer == 0)
return;
// SpriteOp 34 to put sprite at a location
inreg.r[0] = 512+34;
inreg.r[1] = (int) buffer;
inreg.r[2] = pointer;
inreg.r[3] = x;
inreg.r[4] = y;
inreg.r[5] = 8; // GCOL dest=source and sprite mask
_kernel_swi(OS_SpriteOp,&inreg,&outreg);
}
void draw_sprite(char* spritename,int x, int y)
{
// SpriteOp 34 to put sprite at a location