void tileutils_EncodeShadowRun(Pixel32 **inBuf, int *pos, int width, Pixel16 **outBufPtr)
{
Pixel16 pix16;
unsigned char alpha;
int runLen = 0;
Pixel16 * headerPtr = *outBufPtr;
(*outBufPtr)++;
RGB32Info(**inBuf, &pix16, &alpha);
Pixel32 pix32 = (**inBuf) & k_32_BIT_RGB_MASK;
while (pix32 == k_32_BIT_SHADOW_PIXEL && (*pos < width)) {
(*inBuf)++;
(*pos)++;
runLen++;
RGB32Info(**inBuf, &pix16, &alpha);
pix32 = (**inBuf) & k_32_BIT_RGB_MASK;
}
Pixel16 footer = static_cast<Pixel16>(k_TILE_SHADOW_RUN_ID << 8 | runLen);
if (*pos >= width) footer |= k_TILE_EOLN_ID << 8;
*headerPtr = footer;
}
void spriteutils_EncodeShadowRun(Pixel32 **inBuf, sint32 *pos, sint32 width, Pixel16 **outBufPtr)
{
Pixel16 pix16;
uint8 alpha;
sint32 runLen = 0;
Pixel16 footer=0;
Pixel16 shadowPixel;
if (g_is565Format) shadowPixel = k_SHADOW_PIXEL_565;
else shadowPixel = k_SHADOW_PIXEL_555;
RGB32Info(**inBuf, &pix16, &alpha);
while (pix16 == shadowPixel && (*pos < width)) {
(*inBuf)++;
(*pos)++;
runLen++;
RGB32Info(**inBuf, &pix16, &alpha);
}
footer = (Pixel16)(k_SHADOW_RUN_ID << 8 | runLen);
if (*pos >= width) footer |= k_EOLN_ID << 8;
**outBufPtr = footer;
(*outBufPtr)++;
}
void spriteutils_EncodeCopyRun(Pixel32 **inBuf, sint32 *pos, sint32 width, Pixel16 **outBufPtr)
{
Pixel16 pix16;
uint8 alpha;
sint32 runLen = 0;
Pixel16 footer=0;
Pixel16 *headerPtr;
Pixel16 shadowPixel;
if (g_is565Format) {
shadowPixel = k_SHADOW_PIXEL_565;
} else {
shadowPixel = k_SHADOW_PIXEL_555;
}
headerPtr = *outBufPtr;
(*outBufPtr)++;
RGB32Info(**inBuf, &pix16, &alpha);
while (pix16 != shadowPixel && alpha == k_ALL_ALPHA && (*pos < width)) {
if (pix16 == 0x0000) pix16 = 0x0001;
**outBufPtr = pix16;
(*outBufPtr)++;
(*inBuf)++;
(*pos)++;
runLen++;
RGB32Info(**inBuf, &pix16, &alpha);
}
footer = (Pixel16) (k_COPY_RUN_ID << 8 | runLen);
if (*pos >= width) footer |= k_EOLN_ID << 8;
*headerPtr = footer;
}
char tileutils_EncodeScanline(Pixel32 *scanline, int width, Pixel16 **outBufPtr)
{
Pixel16 pix16;
Pixel32 pix32;
Pixel32 * scanPtr = scanline;
unsigned char alpha;
int pos = 0;
char empty = FALSE;
while (scanPtr < (scanline + width)) {
pix32 = *scanPtr;
RGB32Info(pix32, &pix16, &alpha);
pix32 = pix32 & 0x00FFFFFF;
switch (pix32) {
case k_32_BIT_SKIP_PIXEL :
empty = tileutils_EncodeSkipRun(&scanPtr, &pos, width, outBufPtr);
break;
case k_32_BIT_COLORIZE_PIXEL :
tileutils_EncodeColorizeRun(&scanPtr, &pos, width, outBufPtr);
break;
case k_32_BIT_SHADOW_PIXEL :
tileutils_EncodeShadowRun(&scanPtr, &pos, width, outBufPtr);
break;
default:
tileutils_EncodeCopyRun(&scanPtr, &pos, width, outBufPtr);
}
}
return empty;
}
char spriteutils_EncodeScanlineWshadow(Pixel32 *scanline, sint32 width, Pixel16 **outBufPtr)
{
Pixel16 pix16;
Pixel32 pix32;
Pixel32 *scanPtr = scanline;
uint8 alpha;
sint32 pos;
Pixel16 *startPtr;
BOOL empty = FALSE;
Pixel16 shadowPixel;
if (g_is565Format) {
shadowPixel = k_SHADOW_PIXEL_565;
} else {
shadowPixel = k_SHADOW_PIXEL_555;
}
pos = 0;
startPtr = *outBufPtr;
while (scanPtr < (scanline + width)) {
pix32 = *scanPtr;
empty = FALSE;
RGB32Info(pix32, &pix16, &alpha);
if ( (pix16 == k_CHROMAKEY_PIXEL && alpha == k_NO_ALPHA) || (pix16 == k_SHADOWBACKGD_PIXEL) )
{
empty = spriteutils_EncodeChromakeyWshadowRun(&scanPtr, &pos, width, outBufPtr);
}
else
if (pix16 == shadowPixel) {
spriteutils_EncodeShadowRun(&scanPtr, &pos, width, outBufPtr);
}
else
if (alpha != k_NO_ALPHA && alpha != k_ALL_ALPHA) {
spriteutils_EncodeFeatheredRun(&scanPtr, &pos, width, outBufPtr);
}
else {
if (alpha == k_ALL_ALPHA)
spriteutils_EncodeCopyRun(&scanPtr, &pos, width, outBufPtr);
else {
printf("\nError in bitmap data. Pixel with no associated alpha.\n");
exit(-1);
}
}
}
return empty;
}
void spriteutils_EncodeFeatheredRun(Pixel32 **inBuf, sint32 *pos, sint32 width, Pixel16 **outBufPtr)
{
Pixel16 pix16;
Pixel16 footer=0;
uint8 alpha;
RGB32Info(**inBuf, &pix16, &alpha);
if (pix16 == 0x0000) pix16 = 0x0001;
(*inBuf)++;
(*pos)++;
footer = (k_FEATHERED_RUN_ID << 8) | alpha;
if (*pos >= width)
footer |= k_EOLN_ID << 8;
**outBufPtr = footer;
(*outBufPtr)++;
**outBufPtr = pix16;
(*outBufPtr)++;
}
char spriteutils_EncodeChromakeyWshadowRun(Pixel32 **inBuf, sint32 *pos, sint32 width, Pixel16 **outBufPtr)
{
Pixel16 pix16;
uint8 alpha;
sint32 runLen = 0;
Pixel16 footer=0;
RGB32Info(**inBuf, &pix16, &alpha);
while ( ((pix16 == k_CHROMAKEY_PIXEL && alpha == k_NO_ALPHA) || (pix16 == k_SHADOWBACKGD_PIXEL)) && (*pos < width) ) {
(*inBuf)++;
(*pos)++;
runLen++;
RGB32Info(**inBuf, &pix16, &alpha);
}
if (runLen < width) {
footer = (Pixel16)(k_CHROMAKEY_RUN_ID << 8 | runLen);
if (*pos >= width) footer |= k_EOLN_ID << 8;
**outBufPtr = footer;
(*outBufPtr)++;
} else {
return TRUE;
}
return FALSE;
}
char tileutils_EncodeSkipRun(Pixel32 **inBuf, int *pos, int width, Pixel16 **outBufPtr)
{
Pixel16 pix16;
unsigned char alpha;
int runLen = 0;
RGB32Info(**inBuf, &pix16, &alpha);
Pixel32 pix32 = (**inBuf) & k_32_BIT_RGB_MASK;
while (pix32 == k_32_BIT_SKIP_PIXEL && (*pos < width)) {
(*inBuf)++;
(*pos)++;
runLen++;
RGB32Info(**inBuf, &pix16, &alpha);
pix32 = (**inBuf) & k_32_BIT_RGB_MASK;
}
if (runLen < width) {
Pixel16 footer = static_cast<Pixel16>(k_TILE_SKIP_RUN_ID << 8 | runLen);
if (*pos >= width) footer |= k_EOLN_ID << 8;
**outBufPtr = footer;
(*outBufPtr)++;
return FALSE;
} else {
return TRUE;
}
}
