/**
* Get information about an image.
*
* @param id Image to query.
* @param pii Destination for image information.
* @return TRUE on success, FALSE on error.
*/
MWBOOL
GdGetImageInfo(int id, PMWIMAGEINFO pii)
{
PMWIMAGEHDR pimage;
PIMAGEITEM pItem;
int i;
pItem = findimage(id);
if (!pItem) {
memset(pii, 0, sizeof(*pii));
return FALSE;
}
pimage = pItem->pimage;
pii->id = id;
pii->width = pimage->width;
pii->height = pimage->height;
pii->planes = pimage->planes;
pii->bpp = pimage->bpp;
pii->pitch = pimage->pitch;
pii->bytesperpixel = pimage->bytesperpixel;
pii->compression = pimage->compression;
pii->palsize = pimage->palsize;
if (pimage->palsize) {
if (pimage->palette) {
for (i=0; i<pimage->palsize; ++i)
pii->palette[i] = pimage->palette[i];
} else {
/* FIXME handle jpeg's without palette*/
GdGetPalette(pItem->psd, 0, pimage->palsize,
pii->palette);
}
}
return TRUE;
}
/* 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;
}
UINT WINAPI
GetSystemPaletteEntries(HDC hdc,UINT iStartIndex,UINT nEntries,
LPPALETTEENTRY lppe)
{
UINT i;
MWPALENTRY rgb;
/* currently, we only work for screen device*/
if(!hdc || hdc->psd != &scrdev)
return 0;
for(i=0; i<nEntries; ++i) {
if(!GdGetPalette(hdc->psd, i+iStartIndex, 1, &rgb))
break;
lppe->peRed = rgb.r;
lppe->peGreen = rgb.g;
lppe->peBlue = rgb.b;
lppe->peFlags = 0;
++lppe;
}
return i;
}
