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#include "opengl/opengl.hpp"
#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
struct VideoWGL : Video, OpenGL {
~VideoWGL() { term(); }
auto (APIENTRY* wglCreateContextAttribs)(HDC, HGLRC, const int*) -> HGLRC = nullptr;
auto (APIENTRY* wglSwapInterval)(int) -> BOOL = nullptr;
HDC display = nullptr;
HGLRC wglcontext = nullptr;
HWND window = nullptr;
HINSTANCE glwindow = nullptr;
struct {
HWND handle = nullptr;
bool synchronize = false;
uint filter = Video::FilterNearest;
string shader;
} settings;
auto cap(const string& name) -> bool {
if(name == Video::Handle) return true;
if(name == Video::Synchronize) return true;
if(name == Video::Filter) return true;
if(name == Video::Shader) return true;
return false;
}
auto get(const string& name) -> any {
if(name == Video::Handle) return (uintptr)settings.handle;
if(name == Video::Synchronize) return settings.synchronize;
if(name == Video::Filter) return settings.filter;
return {};
}
auto set(const string& name, const any& value) -> bool {
if(name == Video::Handle && value.is<uintptr>()) {
settings.handle = (HWND)value.get<uintptr>();
return true;
}
if(name == Video::Synchronize && value.is<bool>()) {
if(settings.synchronize != value.get<bool>()) {
settings.synchronize = value.get<bool>();
if(wglcontext) {
init();
OpenGL::shader(settings.shader);
if(settings.shader.empty()) OpenGL::filter = settings.filter ? GL_LINEAR : GL_NEAREST;
}
}
}
if(name == Video::Filter && value.is<uint>()) {
settings.filter = value.get<uint>();
if(!settings.shader) OpenGL::filter = settings.filter ? GL_LINEAR : GL_NEAREST;
return true;
}
if(name == Video::Shader && value.is<string>()) {
settings.shader = value.get<string>();
OpenGL::shader(settings.shader);
if(!settings.shader) OpenGL::filter = settings.filter ? GL_LINEAR : GL_NEAREST;
return true;
}
return false;
}
auto lock(uint32_t*& data, uint& pitch, uint width, uint height) -> bool {
OpenGL::size(width, height);
return OpenGL::lock(data, pitch);
}
auto unlock() -> void {
}
auto clear() -> void {
OpenGL::clear();
SwapBuffers(display);
}
auto refresh() -> void {
RECT rc;
GetClientRect(settings.handle, &rc);
outputWidth = rc.right - rc.left, outputHeight = rc.bottom - rc.top;
OpenGL::refresh();
SwapBuffers(display);
}
auto init() -> bool {
GLuint pixel_format;
PIXELFORMATDESCRIPTOR pfd;
memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
display = GetDC(settings.handle);
pixel_format = ChoosePixelFormat(display, &pfd);
SetPixelFormat(display, pixel_format, &pfd);
wglcontext = wglCreateContext(display);
wglMakeCurrent(display, wglcontext);
wglCreateContextAttribs = (HGLRC (APIENTRY*)(HDC, HGLRC, const int*))glGetProcAddress("wglCreateContextAttribsARB");
wglSwapInterval = (BOOL (APIENTRY*)(int))glGetProcAddress("wglSwapIntervalEXT");
if(wglCreateContextAttribs) {
int attributes[] = {
WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
WGL_CONTEXT_MINOR_VERSION_ARB, 2,
0
};
HGLRC context = wglCreateContextAttribs(display, 0, attributes);
if(context) {
wglMakeCurrent(NULL, NULL);
wglDeleteContext(wglcontext);
wglMakeCurrent(display, wglcontext = context);
}
}
if(wglSwapInterval) {
wglSwapInterval(settings.synchronize);
}
OpenGL::init();
return true;
}
auto term() -> void {
OpenGL::term();
if(wglcontext) {
wglDeleteContext(wglcontext);
wglcontext = nullptr;
}
}
};
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