/*********************************************************************
*
* GUI_USAGE_DecUseCnt
*
* Purpose: Decrements the usage count and deletes the usage object if
* the counter reaches 0.
*/
void GUI_USAGE_DecUseCnt(GUI_USAGE_Handle hUsage) {
GUI_USAGE* pThis;
GUI_LOCK();
pThis = GUI_USAGE_H2P(hUsage);
if (--pThis->UseCnt == 0) {
GUI_ALLOC_Free(hUsage);
}
GUI_UNLOCK();
}
/*********************************************************************
*
* GUI_MEMDEV_Clear
*/
void GUI_MEMDEV_Clear(GUI_MEMDEV_Handle hMem) {
if (!hMem) {
if ((hMem = GUI_Context.hDevData) == 0) {
return;
}
}
{
GUI_MEMDEV* pDev;
GUI_USAGE_h hUsage;
GUI_LOCK();
pDev = GUI_MEMDEV_H2P(hMem); /* Convert to pointer */
hUsage = pDev->hUsage;
if (hUsage) {
GUI_USAGE* pUsage = GUI_USAGE_H2P(hUsage);
GUI_USAGE_Clear(pUsage);
}
GUI_UNLOCK();
}
}
/*********************************************************************
*
* _WriteAlphaToActiveAt
*/
static void _WriteAlphaToActiveAt(GUI_MEMDEV_Handle hMem, int Intens, int x, int y) {
/* Make sure the memory handle is valid */
if (hMem) {
GUI_MEMDEV * pDev = GUI_MEMDEV_H2P(hMem);
GUI_USAGE_h hUsage = pDev->hUsage;
GUI_USAGE* pUsage;
int YSize = pDev->YSize;
int yi;
if (hUsage) {
pUsage = GUI_USAGE_H2P(hUsage);
for (yi = 0; yi < YSize; yi++) {
int xOff = 0;
int XSize;
XSize = GUI_USAGE_GetNextDirty(pUsage, &xOff, yi);
/* Draw the partial line which needs to be drawn */
for (; XSize; ) {
U8* pData;
pData = (U8*)GUI_MEMDEV__XY2PTREx(pDev, xOff, yi);
do {
LCD_COLOR Color, BkColor;
int xPos, yPos, Index;
if (pDev->BitsPerPixel == 8) {
Index = *pData++;
} else {
Index = *(U16*)pData;
pData += 2;
}
Color = LCD_Index2Color(Index);
xPos = xOff + x;
yPos = yi +y;
BkColor = LCD_GetPixelColor(xPos, yPos);
Color = LCD_MixColors256(Color, BkColor, Intens);
Index = LCD_Color2Index(Color);
LCD_SetPixelIndex(xPos, yPos, Index);
xOff++;
} while (--XSize);
XSize = GUI_USAGE_GetNextDirty(pUsage, &xOff, yi);
}
}
}
}
}
