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