mirror of https://github.com/bsnes-emu/bsnes.git
95 lines
2.5 KiB
C++
95 lines
2.5 KiB
C++
struct VideoGDI : Video {
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VideoGDI() { initialize(); }
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~VideoGDI() { terminate(); }
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auto driver() -> string override { return "GDI"; }
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auto ready() -> bool override { return _ready; }
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auto hasContext() -> bool override { return true; }
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auto setContext(uintptr context) -> bool override {
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if(context == Video::context()) return true;
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if(!Video::setContext(context)) return false;
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return initialize();
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}
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auto clear() -> void override {
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if(!ready()) return;
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}
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auto acquire(uint32_t*& data, uint& pitch, uint width, uint height) -> bool override {
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if(!ready()) return false;
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if(!_buffer || _width != width || _height != height) {
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if(_buffer) delete[] _buffer;
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if(_bitmap) DeleteObject(_bitmap);
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if(_dc) DeleteObject(_dc);
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_buffer = new uint32_t[width * height]();
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_width = width;
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_height = height;
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HDC hdc = GetDC((HWND)_context);
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_dc = CreateCompatibleDC(hdc);
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_bitmap = CreateCompatibleBitmap(hdc, width, height);
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SelectObject(_dc, _bitmap);
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ReleaseDC((HWND)_context, hdc);
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memory::fill(&_info, sizeof(BITMAPINFO));
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_info.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
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_info.bmiHeader.biWidth = width;
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_info.bmiHeader.biHeight = -height;
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_info.bmiHeader.biPlanes = 1;
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_info.bmiHeader.biBitCount = 32;
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_info.bmiHeader.biCompression = BI_RGB;
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_info.bmiHeader.biSizeImage = width * height * sizeof(uint32_t);
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}
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pitch = _width * sizeof(uint32_t);
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return data = _buffer;
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}
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auto release() -> void override {
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if(!ready()) return;
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}
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auto output() -> void override {
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if(!ready()) return;
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RECT rc;
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GetClientRect((HWND)_context, &rc);
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SetDIBits(_dc, _bitmap, 0, _height, (void*)_buffer, &_info, DIB_RGB_COLORS);
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HDC hdc = GetDC((HWND)_context);
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StretchBlt(hdc, rc.left, rc.top, rc.right, rc.bottom, _dc, 0, 0, _width, _height, SRCCOPY);
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ReleaseDC((HWND)_context, hdc);
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}
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private:
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auto initialize() -> bool {
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terminate();
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if(!_context) return false;
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_width = 0;
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_height = 0;
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return _ready = true;
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}
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auto terminate() -> void {
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_ready = false;
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if(_buffer) { delete[] _buffer; _buffer = nullptr; }
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if(_bitmap) { DeleteObject(_bitmap); _bitmap = nullptr; }
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if(_dc) { DeleteDC(_dc); _dc = nullptr; }
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}
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bool _ready = false;
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uint32_t* _buffer = nullptr;
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uint _width = 0;
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uint _height = 0;
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HBITMAP _bitmap = nullptr;
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HDC _dc = nullptr;
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BITMAPINFO _info = {};
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};
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