90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
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#include <assert.h>
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struct VideoGDI : Video {
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~VideoGDI() { term(); }
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uint32_t* buffer = nullptr;
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HBITMAP bitmap = nullptr;
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HDC bitmapdc = nullptr;
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BITMAPINFO bmi;
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struct {
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HWND handle = nullptr;
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unsigned width = 0;
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unsigned height = 0;
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} settings;
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auto cap(const string& name) -> bool {
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if(name == Video::Handle) return true;
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return false;
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}
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auto get(const string& name) -> any {
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if(name == Video::Handle) return (uintptr_t)settings.handle;
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return {};
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}
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auto set(const string& name, const any& value) -> bool {
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if(name == Video::Handle && value.is<uintptr_t>()) {
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settings.handle = (HWND)value.get<uintptr_t>();
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return true;
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}
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return false;
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}
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auto lock(uint32_t*& data, unsigned& pitch, unsigned width, unsigned height) -> bool {
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settings.width = width;
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settings.height = height;
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pitch = 1024 * 4;
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return data = buffer;
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}
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auto unlock() -> void {}
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auto clear() -> void {}
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auto refresh() -> void {
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RECT rc;
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GetClientRect(settings.handle, &rc);
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SetDIBits(bitmapdc, bitmap, 0, settings.height, (void*)buffer, &bmi, DIB_RGB_COLORS);
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HDC hdc = GetDC(settings.handle);
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StretchBlt(hdc, rc.left, rc.top, rc.right, rc.bottom, bitmapdc, 0, 1024 - settings.height, settings.width, settings.height, SRCCOPY);
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ReleaseDC(settings.handle, hdc);
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}
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auto init() -> bool {
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buffer = (uint32_t*)memory::allocate(1024 * 1024 * sizeof(uint32_t));
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HDC hdc = GetDC(settings.handle);
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bitmapdc = CreateCompatibleDC(hdc);
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assert(bitmapdc);
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bitmap = CreateCompatibleBitmap(hdc, 1024, 1024);
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assert(bitmap);
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SelectObject(bitmapdc, bitmap);
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ReleaseDC(settings.handle, hdc);
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memset(&bmi, 0, sizeof(BITMAPINFO));
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bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
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bmi.bmiHeader.biWidth = 1024;
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bmi.bmiHeader.biHeight = -1024;
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bmi.bmiHeader.biPlanes = 1;
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bmi.bmiHeader.biBitCount = 32; //biBitCount of 15 is invalid, biBitCount of 16 is really RGB555
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bmi.bmiHeader.biCompression = BI_RGB;
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bmi.bmiHeader.biSizeImage = 1024 * 1024 * sizeof(uint32_t);
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settings.width = 256;
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settings.height = 256;
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return true;
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}
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auto term() -> void {
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DeleteObject(bitmap);
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DeleteDC(bitmapdc);
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if(buffer) { memory::free(buffer); buffer = nullptr; }
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}
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};
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