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added boundary checking to setPixel() for development purposes

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HW
2012-06-10 17:34:46 +02:00
parent 0a4d49edfb
commit 33ec40f29a
1 changed files with 31 additions and 26 deletions
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57
blitbuffer.c
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@@ -21,8 +21,13 @@
#include "blitbuffer.h"
inline int setPixel(BlitBuffer *bb, int x, int y, int c) {
inline int setPixel(lua_State *L, BlitBuffer *bb, int x, int y, int c) {
uint8_t *dstptr = (uint8_t*)(bb->data) + (y * bb->pitch) + (x / 2);
#ifndef NO_CHECK_BOUNDS
if(x < 0 || x >= bb->w || y < 0 || y >= bb->h) {
return luaL_error(L, "out of bounds in blitbuffer.setPixel()");
}
#endif
if(x % 2 == 0) {
*dstptr &= 0x0F;
@@ -532,10 +537,10 @@ static int paintCircle(lua_State *L) {
/* draw two axles */
for(tmp_y = r; tmp_y > r2; tmp_y--) {
setPixel(dst, center_x+0, center_y+tmp_y, c);
setPixel(dst, center_x-0, center_y-tmp_y, c);
setPixel(dst, center_x+tmp_y, center_y+0, c);
setPixel(dst, center_x-tmp_y, center_y-0, c);
setPixel(L, dst, center_x+0, center_y+tmp_y, c);
setPixel(L, dst, center_x-0, center_y-tmp_y, c);
setPixel(L, dst, center_x+tmp_y, center_y+0, c);
setPixel(L, dst, center_x-tmp_y, center_y-0, c);
}
while(x < y) {
@@ -563,21 +568,21 @@ static int paintCircle(lua_State *L) {
}
for(tmp_y = y; tmp_y > y2; tmp_y--) {
setPixel(dst, center_x+x, center_y+tmp_y, c);
setPixel(dst, center_x+tmp_y, center_y+x, c);
setPixel(L, dst, center_x+x, center_y+tmp_y, c);
setPixel(L, dst, center_x+tmp_y, center_y+x, c);
setPixel(dst, center_x+tmp_y, center_y-x, c);
setPixel(dst, center_x+x, center_y-tmp_y, c);
setPixel(L, dst, center_x+tmp_y, center_y-x, c);
setPixel(L, dst, center_x+x, center_y-tmp_y, c);
setPixel(dst, center_x-x, center_y-tmp_y, c);
setPixel(dst, center_x-tmp_y, center_y-x, c);
setPixel(L, dst, center_x-x, center_y-tmp_y, c);
setPixel(L, dst, center_x-tmp_y, center_y-x, c);
setPixel(dst, center_x-tmp_y, center_y+x, c);
setPixel(dst, center_x-x, center_y+tmp_y, c);
setPixel(L, dst, center_x-tmp_y, center_y+x, c);
setPixel(L, dst, center_x-x, center_y+tmp_y, c);
}
}
if(r == w) {
setPixel(dst, center_x, center_y, c);
setPixel(L, dst, center_x, center_y, c);
}
return 0;
}
@@ -617,10 +622,10 @@ static int paintRoundedCorner(lua_State *L) {
/* draw two axles */
/*for(tmp_y = r; tmp_y > r2; tmp_y--) {*/
/*setPixel(dst, (w-r)+off_x+0, (h-r)+off_y+tmp_y-1, c);*/
/*setPixel(dst, (w-r)+off_x-0, (r)+off_y-tmp_y, c);*/
/*setPixel(dst, (w-r)+off_x+tmp_y, (h-r)+off_y+0, c);*/
/*setPixel(dst, (r)+off_x-tmp_y, (h-r)+off_y-0-1, c);*/
/*setPixel(L, dst, (w-r)+off_x+0, (h-r)+off_y+tmp_y-1, c);*/
/*setPixel(L, dst, (w-r)+off_x-0, (r)+off_y-tmp_y, c);*/
/*setPixel(L, dst, (w-r)+off_x+tmp_y, (h-r)+off_y+0, c);*/
/*setPixel(L, dst, (r)+off_x-tmp_y, (h-r)+off_y-0-1, c);*/
/*}*/
while(x < y) {
@@ -648,17 +653,17 @@ static int paintRoundedCorner(lua_State *L) {
}
for(tmp_y = y; tmp_y > y2; tmp_y--) {
setPixel(dst, (w-r)+off_x+x-1, (h-r)+off_y+tmp_y-1, c);
setPixel(dst, (w-r)+off_x+tmp_y-1, (h-r)+off_y+x-1, c);
setPixel(L, dst, (w-r)+off_x+x-1, (h-r)+off_y+tmp_y-1, c);
setPixel(L, dst, (w-r)+off_x+tmp_y-1, (h-r)+off_y+x-1, c);
setPixel(dst, (w-r)+off_x+tmp_y-1, (r)+off_y-x, c);
setPixel(dst, (w-r)+off_x+x-1, (r)+off_y-tmp_y, c);
setPixel(L, dst, (w-r)+off_x+tmp_y-1, (r)+off_y-x, c);
setPixel(L, dst, (w-r)+off_x+x-1, (r)+off_y-tmp_y, c);
setPixel(dst, (r)+off_x-x, (r)+off_y-tmp_y, c);
setPixel(dst, (r)+off_x-tmp_y, (r)+off_y-x, c);
setPixel(L, dst, (r)+off_x-x, (r)+off_y-tmp_y, c);
setPixel(L, dst, (r)+off_x-tmp_y, (r)+off_y-x, c);
setPixel(dst, (r)+off_x-tmp_y, (h-r)+off_y+x-1, c);
setPixel(dst, (r)+off_x-x, (h-r)+off_y+tmp_y-1, c);
setPixel(L, dst, (r)+off_x-tmp_y, (h-r)+off_y+x-1, c);
setPixel(L, dst, (r)+off_x-x, (h-r)+off_y+tmp_y-1, c);
}
}
return 0;