RT_B RT_API RtGdipStretchBitmap(RT_H hBitmap, RT_H hDc, RT_N nWidth, RT_N nHeight, RT_GDIP_INTERPOLATION_MODE nInterpolationMode)
{
GpGraphics* lpGraphics;
GpBitmap* lpBitmap;
GpBrush* lpBrush;
GpStatus nStatus;
RT_B bResult;
lpGraphics = RT_NULL;
lpBitmap = RT_NULL;
lpBrush = RT_NULL;
/* Create destination graphics hDc. */
nStatus = GdipCreateFromHDC(hDc, &lpGraphics);
if (nStatus)
{
RtGdipSetLastErrorFromGpStatus(nStatus);
goto handle_error;
}
/* Adjust quality. */
nStatus = GdipSetInterpolationMode(lpGraphics, (InterpolationMode)nInterpolationMode);
if (nStatus)
{
RtGdipSetLastErrorFromGpStatus(nStatus);
goto handle_error;
}
/* Create a brush to fill the background. */
nStatus = GdipCreateSolidFill(0xFFFFFFFF, &lpBrush);
if (nStatus)
{
RtGdipSetLastErrorFromGpStatus(nStatus);
goto handle_error;
}
/* Fill the destination DC with a background. Necessary to avoid edges artifacts. */
nStatus = GdipFillRectangleI(lpGraphics, lpBrush, 0, 0, nWidth, nHeight);
if (nStatus)
{
RtGdipSetLastErrorFromGpStatus(nStatus);
goto handle_error;
}
/* Create source image/bitmap from hBitmap. */
nStatus = GdipCreateBitmapFromHBITMAP(hBitmap, RT_NULL, &lpBitmap);
if (nStatus)
{
RtGdipSetLastErrorFromGpStatus(nStatus);
goto handle_error;
}
/* Stretch. */
nStatus = GdipDrawImageRectI(lpGraphics, lpBitmap, 0, 0, nWidth, nHeight);
if (nStatus)
{
RtGdipSetLastErrorFromGpStatus(nStatus);
goto handle_error;
}
bResult = RT_TRUE;
goto free_resources;
handle_error:
bResult = RT_FALSE;
free_resources:
if (lpGraphics)
{
nStatus = GdipDeleteGraphics(lpGraphics);
lpGraphics = RT_NULL;
if (nStatus && bResult)
{
RtGdipSetLastErrorFromGpStatus(nStatus);
goto handle_error;
}
}
if (lpBitmap)
{
nStatus = GdipDisposeImage(lpBitmap);
lpBitmap = RT_NULL;
if (nStatus && bResult)
{
RtGdipSetLastErrorFromGpStatus(nStatus);
goto handle_error;
}
}
if (lpBrush)
{
nStatus = GdipDeleteBrush(lpBrush);
lpBrush = RT_NULL;
if (nStatus && bResult)
{
RtGdipSetLastErrorFromGpStatus(nStatus);
goto handle_error;
}
}
return bResult;
}
void
win_emoji_show(int x, int y, wchar * efn, int elen, ushort lattr)
{
GpStatus s;
static GdiplusStartupInput gi = (GdiplusStartupInput){1, NULL, FALSE, FALSE};
static ULONG_PTR gis = 0;
if (!gis) {
s = GdiplusStartup(&gis, &gi, NULL);
gpcheck("startup", s);
}
bool use_stream = true;
IStream * fs = 0;
if (use_stream) {
s = GdipCreateStreamOnFile(efn, 0 /* FileMode.Open */, &fs);
gpcheck("stream", s);
}
else
s = NotImplemented;
GpImage * img = 0;
if (s == Ok) {
s = GdipLoadImageFromStream(fs, &img);
gpcheck("load stream", s);
}
else {
// This is reported to generate a memory leak, so rather use the stream.
s = GdipLoadImageFromFile(efn, &img);
gpcheck("load file", s);
}
int col = PADDING + x * cell_width;
int row = PADDING + y * cell_height;
if ((lattr & LATTR_MODE) >= LATTR_BOT)
row -= cell_height;
int w = elen * cell_width;
if ((lattr & LATTR_MODE) != LATTR_NORM)
w *= 2;
int h = cell_height;
if ((lattr & LATTR_MODE) >= LATTR_TOP)
h *= 2;
if (cfg.emoji_placement) {
uint iw, ih;
s = GdipGetImageWidth(img, &iw);
gpcheck("width", s);
s = GdipGetImageHeight(img, &ih);
gpcheck("height", s);
// consider aspect ratio so that ih/iw == h/w;
// if EMPL_FULL, always adjust w
// if ih/iw > h/w, make w smaller
// if iw/ih > w/h, make h smaller
if (cfg.emoji_placement == EMPL_FULL && ih * w != h * iw) {
w = h * iw / ih;
}
else if (ih * w > h * iw) {
int w0 = w;
w = h * iw / ih;
if (cfg.emoji_placement == EMPL_MIDDLE) {
// horizontally center
col += (w0 - w) / 2;
}
}
else if (iw * h > w * ih) {
int h0 = h;
h = w * ih / iw;
// vertically center
row += (h0 - h) / 2;
}
}
GpGraphics * gr;
s = GdipCreateFromHDC(GetDC(wnd), &gr);
gpcheck("hdc", s);
s = GdipDrawImageRectI(gr, img, col, row, w, h);
gpcheck("draw", s);
s = GdipFlush(gr, FlushIntentionFlush);
gpcheck("flush", s);
s = GdipDeleteGraphics(gr);
gpcheck("delete gr", s);
s = GdipDisposeImage(img);
gpcheck("dispose img", s);
if (fs) {
// Release stream resources, close file.
fs->lpVtbl->Release(fs);
}
}