ID2D1HwndRenderTarget *makeHWNDRenderTarget(HWND hwnd)
{
D2D1_RENDER_TARGET_PROPERTIES props;
D2D1_HWND_RENDER_TARGET_PROPERTIES hprops;
HDC dc;
RECT r;
ID2D1HwndRenderTarget *rt;
HRESULT hr;
// we need a DC for the DPI
// we *could* just use the screen DPI but why when we have a window handle and its DC has a DPI
dc = GetDC(hwnd);
if (dc == NULL)
logLastError("error getting DC to find DPI in makeHWNDRenderTarget()");
ZeroMemory(&props, sizeof (D2D1_RENDER_TARGET_PROPERTIES));
props.type = D2D1_RENDER_TARGET_TYPE_DEFAULT;
props.pixelFormat.format = DXGI_FORMAT_UNKNOWN;
props.pixelFormat.alphaMode = D2D1_ALPHA_MODE_UNKNOWN;
props.dpiX = GetDeviceCaps(dc, LOGPIXELSX);
props.dpiY = GetDeviceCaps(dc, LOGPIXELSY);
props.usage = D2D1_RENDER_TARGET_USAGE_NONE;
props.minLevel = D2D1_FEATURE_LEVEL_DEFAULT;
if (ReleaseDC(hwnd, dc) == 0)
logLastError("error releasing DC for finding DPI in makeHWNDRenderTarget()");
if (GetClientRect(hwnd, &r) == 0)
logLastError("error getting current size of window in makeHWNDRenderTarget()");
ZeroMemory(&hprops, sizeof (D2D1_HWND_RENDER_TARGET_PROPERTIES));
hprops.hwnd = hwnd;
hprops.pixelSize.width = r.right - r.left;
hprops.pixelSize.height = r.bottom - r.top;
hprops.presentOptions = D2D1_PRESENT_OPTIONS_NONE;
hr = ID2D1Factory_CreateHwndRenderTarget(d2dfactory,
&props,
&hprops,
&rt);
if (hr != S_OK)
logHRESULT("error creating area HWND render target in makeHWNDRenderTarget()", hr);
return rt;
}
/**
* Creates a ID2D1HwndRenderTarget and associated ID2D1Bitmap
*/
static int D2D_CreateRenderTarget(vout_display_t *vd)
{
vout_display_sys_t *sys = vd->sys;
sys->d2_render_target = NULL;
D2D1_PIXEL_FORMAT pf = {
DXGI_FORMAT_B8G8R8A8_UNORM,
D2D1_ALPHA_MODE_IGNORE
};
D2D1_RENDER_TARGET_PROPERTIES rtp = {
D2D1_RENDER_TARGET_TYPE_DEFAULT,
pf,
0,
0,
D2D1_RENDER_TARGET_USAGE_NONE,
D2D1_FEATURE_LEVEL_DEFAULT
};
D2D1_SIZE_U size = {
sys->rect_dest.right - sys->rect_dest.left,
sys->rect_dest.bottom - sys->rect_dest.top
};
D2D1_HWND_RENDER_TARGET_PROPERTIES hrtp = {
sys->hvideownd,
size,
D2D1_PRESENT_OPTIONS_IMMEDIATELY /* this might need fiddling */
};
HRESULT hr = ID2D1Factory_CreateHwndRenderTarget(sys->d2_factory,
&rtp,
&hrtp,
&sys->d2_render_target);
if (hr != S_OK) {
msg_Err(vd, "Cannot create render target (hvideownd = 0x%x, width = %d, height = %d, pf.format = %d, hr = 0x%x)!",
(unsigned)hrtp.hwnd, hrtp.pixelSize.width,
hrtp.pixelSize.height, pf.format, (unsigned)hr);
sys->d2_render_target = NULL;
return VLC_EGENERIC;
}
FLOAT dpi_x, dpi_y;
ID2D1Factory_GetDesktopDpi(sys->d2_factory,
&dpi_x,
&dpi_y);
D2D1_BITMAP_PROPERTIES bp = {
pf,
dpi_x,
dpi_y
};
D2D1_SIZE_U bitmap_size = {
vd->fmt.i_width,
vd->fmt.i_height
};
hr = ID2D1HwndRenderTarget_CreateBitmap(sys->d2_render_target,
bitmap_size,
NULL,
0,
&bp,
&sys->d2_bitmap);
if (hr != S_OK) {
msg_Err(vd, "Failed to create bitmap (hr = 0x%x)!", (unsigned)hr);
sys->d2_bitmap = NULL;
D2D_DestroyRenderTarget(vd);
return VLC_EGENERIC;
}
#ifndef NDEBUG
msg_Dbg(vd, "Render trgt dbg: dpi = %f, render_target = %p, bitmap = %p",
dpi_x, sys->d2_render_target, sys->d2_bitmap);
#endif
return VLC_SUCCESS;
}
