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Merge pull request #14622 from bruvzg/non-rectangular-windows

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Experimental support for windows with per-pixel transparency.
This commit is contained in:
Hein-Pieter van Braam
2018-05-08 16:44:35 +02:00
committed by GitHub
parent aacd7f012e ddae098dee
commit e668757aa9
16 changed files with 417 additions and 21 deletions
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121
platform/windows/os_windows.cpp
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@ -637,6 +637,28 @@ LRESULT OS_Windows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
maximized = false;
minimized = false;
}
if (is_layered_allowed() && layered_window) {
DeleteObject(hBitmap);
RECT r;
GetWindowRect(hWnd, &r);
dib_size = Size2(r.right - r.left, r.bottom - r.top);
BITMAPINFO bmi;
ZeroMemory(&bmi, sizeof(BITMAPINFO));
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth = dib_size.x;
bmi.bmiHeader.biHeight = dib_size.y;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 32;
bmi.bmiHeader.biCompression = BI_RGB;
bmi.bmiHeader.biSizeImage = dib_size.x, dib_size.y * 4;
hBitmap = CreateDIBSection(hDC_dib, &bmi, DIB_RGB_COLORS, (void **)&dib_data, NULL, 0x0);
SelectObject(hDC_dib, hBitmap);
ZeroMemory(dib_data, dib_size.x * dib_size.y * 4);
}
//return 0; // Jump Back
} break;
case WM_ENTERSIZEMOVE: {
@ -1151,6 +1173,9 @@ Error OS_Windows::initialize(const VideoMode &p_desired, int p_video_driver, int
SetFocus(hWnd); // Sets Keyboard Focus To
}
if (p_desired.layered_splash) {
set_window_per_pixel_transparency_enabled(true);
}
return OK;
}
@ -1542,6 +1567,9 @@ void OS_Windows::set_window_fullscreen(bool p_enabled) {
if (video_mode.fullscreen == p_enabled)
return;
if (layered_window)
set_window_per_pixel_transparency_enabled(false);
if (p_enabled) {
if (pre_fs_valid) {
@ -1646,10 +1674,97 @@ bool OS_Windows::is_window_always_on_top() const {
return video_mode.always_on_top;
}
bool OS_Windows::get_window_per_pixel_transparency_enabled() const {
if (!is_layered_allowed()) return false;
return layered_window;
}
void OS_Windows::set_window_per_pixel_transparency_enabled(bool p_enabled) {
if (!is_layered_allowed()) return;
if (layered_window != p_enabled) {
if (p_enabled) {
set_borderless_window(true);
//enable per-pixel alpha
hDC_dib = CreateCompatibleDC(GetDC(hWnd));
SetWindowLong(hWnd, GWL_EXSTYLE, GetWindowLong(hWnd, GWL_EXSTYLE) | WS_EX_LAYERED);
RECT r;
GetWindowRect(hWnd, &r);
dib_size = Size2(r.right - r.left, r.bottom - r.top);
BITMAPINFO bmi;
ZeroMemory(&bmi, sizeof(BITMAPINFO));
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth = dib_size.x;
bmi.bmiHeader.biHeight = dib_size.y;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 32;
bmi.bmiHeader.biCompression = BI_RGB;
bmi.bmiHeader.biSizeImage = dib_size.x * dib_size.y * 4;
hBitmap = CreateDIBSection(hDC_dib, &bmi, DIB_RGB_COLORS, (void **)&dib_data, NULL, 0x0);
SelectObject(hDC_dib, hBitmap);
ZeroMemory(dib_data, dib_size.x * dib_size.y * 4);
layered_window = true;
} else {
//disable per-pixel alpha
layered_window = false;
SetWindowLong(hWnd, GWL_EXSTYLE, GetWindowLong(hWnd, GWL_EXSTYLE) & ~WS_EX_LAYERED);
//cleanup
DeleteObject(hBitmap);
DeleteDC(hDC_dib);
}
}
}
uint8_t *OS_Windows::get_layered_buffer_data() {
return (is_layered_allowed() && layered_window) ? dib_data : NULL;
}
Size2 OS_Windows::get_layered_buffer_size() {
return (is_layered_allowed() && layered_window) ? dib_size : Size2();
}
void OS_Windows::swap_layered_buffer() {
if (is_layered_allowed() && layered_window) {
//premultiply alpha
for (int y = 0; y < dib_size.y; y++) {
for (int x = 0; x < dib_size.x; x++) {
float alpha = (float)dib_data[y * (int)dib_size.x * 4 + x * 4 + 3] / (float)0xFF;
dib_data[y * (int)dib_size.x * 4 + x * 4 + 0] *= alpha;
dib_data[y * (int)dib_size.x * 4 + x * 4 + 1] *= alpha;
dib_data[y * (int)dib_size.x * 4 + x * 4 + 2] *= alpha;
}
}
//swap layered window buffer
POINT ptSrc = { 0, 0 };
SIZE sizeWnd = { (long)dib_size.x, (long)dib_size.y };
BLENDFUNCTION bf;
bf.BlendOp = AC_SRC_OVER;
bf.BlendFlags = 0;
bf.AlphaFormat = AC_SRC_ALPHA;
bf.SourceConstantAlpha = 0xFF;
UpdateLayeredWindow(hWnd, NULL, NULL, &sizeWnd, hDC_dib, &ptSrc, 0, &bf, ULW_ALPHA);
}
}
void OS_Windows::set_borderless_window(bool p_borderless) {
if (video_mode.borderless_window == p_borderless)
return;
if (!p_borderless && layered_window)
set_window_per_pixel_transparency_enabled(false);
video_mode.borderless_window = p_borderless;
_update_window_style();
@ -2582,6 +2697,8 @@ Error OS_Windows::move_to_trash(const String &p_path) {
OS_Windows::OS_Windows(HINSTANCE _hInstance) {
key_event_pos = 0;
layered_window = false;
hBitmap = NULL;
force_quit = false;
alt_mem = false;
gr_mem = false;
@ -2615,6 +2732,10 @@ OS_Windows::OS_Windows(HINSTANCE _hInstance) {
}
OS_Windows::~OS_Windows() {
if (is_layered_allowed() && layered_window) {
DeleteObject(hBitmap);
DeleteDC(hDC_dib);
}
#ifdef STDOUT_FILE
fclose(stdo);
#endif