/* return RGB value at specified coordinates*/
COLORREF WINAPI
GetPixel(HDC hdc, int x, int y)
{
HWND hwnd;
POINT pt;
MWPIXELVAL pixel;
MWPALENTRY rgb;
hwnd = MwPrepareDC(hdc);
if(!hwnd)
return CLR_INVALID;
pt.x = x;
pt.y = y;
if(MwIsClientDC(hdc))
ClientToScreen(hwnd, &pt);
/* read pixel value*/
GdReadArea(hdc->psd, pt.x, pt.y, 1, 1, &pixel);
switch(hdc->psd->pixtype) {
case MWPF_TRUECOLOR0888:
case MWPF_TRUECOLOR888:
/* create RGB colorval from 8/8/8 pixel*/
return PIXEL888TOCOLORVAL(pixel);
case MWPF_TRUECOLOR565:
/* create RGB colorval from 5/6/5 pixel*/
return PIXEL565TOCOLORVAL(pixel);
case MWPF_TRUECOLOR555:
/* create RGB colorval from 5/5/5 pixel*/
return PIXEL555TOCOLORVAL(pixel);
case MWPF_TRUECOLOR332:
/* create RGB colorval from 3/3/2 pixel*/
return PIXEL332TOCOLORVAL(pixel);
case MWPF_TRUECOLOR233:
/* create RGB colorval from 2/3/3 pixel*/
return PIXEL233TOCOLORVAL(pixel);
case MWPF_PALETTE:
if(GdGetPalette(hdc->psd, pixel, 1, &rgb))
return RGB(rgb.r, rgb.g, rgb.b);
}
return CLR_INVALID;
}
/**
* Convert a color from a driver-dependent PIXELVAL to a COLORVAL.
*
* @param psd Screen device.
* @param pixel Hardware-specific color.
* @return 24-bit RGB color.
*/
MWCOLORVAL
GdGetColorRGB(PSD psd, MWPIXELVAL pixel)
{
switch (psd->pixtype) {
case MWPF_TRUECOLOR8888:
return PIXEL8888TOCOLORVAL(pixel);
case MWPF_TRUECOLORABGR:
return PIXELABGRTOCOLORVAL(pixel);
case MWPF_TRUECOLOR888:
return PIXEL888TOCOLORVAL(pixel);
case MWPF_TRUECOLOR565:
return PIXEL565TOCOLORVAL(pixel);
case MWPF_TRUECOLOR555:
return PIXEL555TOCOLORVAL(pixel);
case MWPF_TRUECOLOR1555:
return PIXEL1555TOCOLORVAL(pixel);
case MWPF_TRUECOLOR332:
return PIXEL332TOCOLORVAL(pixel);
case MWPF_TRUECOLOR233:
return PIXEL233TOCOLORVAL(pixel);
case MWPF_PALETTE:
return GETPALENTRY(gr_palette, pixel);
default:
assert(FALSE);
return 0;
}
}