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8 bit coordinates are sufficient, saving 46 bytes

This commit is contained in:
Christian Kroll 2011-03-31 21:38:22 +00:00
parent 40eae390d1
commit 07c9d27b75
1 changed files with 6 additions and 6 deletions
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12
animations/bitmapscroller.c
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@ -46,8 +46,8 @@ bitmap_t;
*/
static unsigned char bitmap_getAlignedChunk(bitmap_t const *const pBitmap,
unsigned char const nBorgPlane,
unsigned int const x,
unsigned int const y)
unsigned char const x,
unsigned char const y)
{
assert(x <= pBitmap->nChunkDomain);
assert(y < pBitmap->nHeight);
@ -96,8 +96,8 @@ static unsigned char bitmap_getAlignedChunk(bitmap_t const *const pBitmap,
* left of the viewport.
*/
static void bitmap_drawViewport(bitmap_t const *const pBitmap,
unsigned int const nX,
unsigned int const nY)
unsigned char const nX,
unsigned char const nY)
{
assert(nX <= pBitmap->nXDomain);
assert(nY <= pBitmap->nYDomain);
@ -199,8 +199,8 @@ void bitmap_scroll(unsigned char const nWidth,
bitmap.nChunkCount = (((bitmap.nViewportWidth - 1) / 8) + 1);
// initial starting point
int x = bitmap.nXDomain > 0 ? random8() % bitmap.nXDomain : 0;
int y = bitmap.nYDomain > 0 ? random8() % bitmap.nYDomain : 0;
unsigned char x = bitmap.nXDomain > 0 ? random8() % bitmap.nXDomain : 0;
unsigned char y = bitmap.nYDomain > 0 ? random8() % bitmap.nYDomain : 0;
char dx = 0;
char dy = 0;