120 lines
4.5 KiB
C++
120 lines
4.5 KiB
C++
inline void *OpenGL_LoadFunction(char *Name)
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{
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void *Result = (void *)wglGetProcAddress(Name);
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if((Result == 0) || (Result == (void *)1) || (Result == (void *)2) || (Result == (void *)3))
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{
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HMODULE Module = LoadLibraryA("opengl32.dll");
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Result = (void *)GetProcAddress(Module, Name);
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}
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return(Result);
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}
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static void *OpenGL_AllocateMemory(umm Size)
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{
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void *Result = VirtualAlloc(0, Size, MEM_COMMIT|MEM_RESERVE, PAGE_READWRITE);
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return(Result);
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}
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static void OpenGL_DeallocateMemory(void *Memory)
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{
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VirtualFree(Memory, 0, MEM_RELEASE);
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}
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#define WGL_DRAW_TO_WINDOW_ARB 0x2001
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#define WGL_SUPPORT_OPENGL_ARB 0x2010
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#define WGL_DOUBLE_BUFFER_ARB 0x2011
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#define WGL_PIXEL_TYPE_ARB 0x2013
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#define WGL_TYPE_RGBA_ARB 0x202B
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#define WGL_COLOR_BITS_ARB 0x2014
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#define WGL_DEPTH_BITS_ARB 0x2022
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#define WGL_STENCIL_BITS_ARB 0x2023
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#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
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#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
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#define WGL_CONTEXT_FLAGS_ARB 0x2094
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#define WGL_CONTEXT_DEBUG_BIT_ARB 0x00000001
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#define WGL_SAMPLE_BUFFERS_ARB 0x2041
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#define WGL_SAMPLES_ARB 0x2042
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#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
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#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
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typedef BOOL wgl_choose_pixel_format_arb(HDC hdc,
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const int *piAttribIList,
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const FLOAT *pfAttribFList,
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UINT nMaxFormats,
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int *piFormats,
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UINT *nNumFormats);
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typedef HGLRC wgl_create_context_attribs_arb(HDC hDC, HGLRC hShareContext,
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const int *attribList);
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typedef BOOL wgl_make_context_current_arb(HDC hDrawDC, HDC hReadDC, HGLRC hglrc);
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typedef BOOL wgl_swap_interval_ext(int interval);
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static wgl_choose_pixel_format_arb *wglChoosePixelFormatARB;
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static wgl_create_context_attribs_arb *wglCreateContextAttribsARB;
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static wgl_make_context_current_arb *wglMakeContextCurrentARB;
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static wgl_swap_interval_ext *wglSwapIntervalEXT;
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#include "opengl_render.h"
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#include "opengl_render.cpp"
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static void Win32_CreateOpenGLContext(HDC DeviceContext)
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{
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PIXELFORMATDESCRIPTOR PixelFormatDesc = {};
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PixelFormatDesc.nSize = sizeof(PixelFormatDesc);
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PixelFormatDesc.nVersion = 1;
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PixelFormatDesc.dwFlags = PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_DOUBLEBUFFER;
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PixelFormatDesc.iPixelType = PFD_TYPE_RGBA;
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PixelFormatDesc.cColorBits = 32;
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PixelFormatDesc.cDepthBits = 24;
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PixelFormatDesc.cStencilBits = 8;
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PixelFormatDesc.iLayerType = PFD_MAIN_PLANE;
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int PixelFormat = ChoosePixelFormat(DeviceContext, &PixelFormatDesc);
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Assert(PixelFormat);
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SetPixelFormat(DeviceContext, PixelFormat, &PixelFormatDesc);
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HGLRC DummyContext = wglCreateContext(DeviceContext);
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wglMakeCurrent(DeviceContext, DummyContext);
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wglChoosePixelFormatARB = (wgl_choose_pixel_format_arb *)OpenGL_LoadFunction("wglChoosePixelFormatARB");
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wglCreateContextAttribsARB = (wgl_create_context_attribs_arb *)OpenGL_LoadFunction("wglCreateContextAttribsARB");
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wglMakeContextCurrentARB = (wgl_make_context_current_arb *)OpenGL_LoadFunction("wglMakeContextCurrentARB");
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wglSwapIntervalEXT = (wgl_swap_interval_ext *)OpenGL_LoadFunction("wglSwapIntervalEXT");
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int AttribList[] =
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{
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WGL_DRAW_TO_WINDOW_ARB, 1,
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WGL_SUPPORT_OPENGL_ARB, 1,
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WGL_DOUBLE_BUFFER_ARB, 1,
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WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
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WGL_COLOR_BITS_ARB, 32,
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WGL_DEPTH_BITS_ARB, 24,
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WGL_STENCIL_BITS_ARB, 8,
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WGL_SAMPLE_BUFFERS_ARB, true,
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WGL_SAMPLES_ARB, 16,
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0
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};
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UINT NumFormats;
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wglChoosePixelFormatARB(DeviceContext, AttribList, 0, 1, &PixelFormat, &NumFormats);
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int ContextAttribs[] =
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{
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WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
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WGL_CONTEXT_MINOR_VERSION_ARB, 3,
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WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
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WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_DEBUG_BIT_ARB,
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0
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};
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HGLRC RenderContext = wglCreateContextAttribsARB(DeviceContext, DummyContext, ContextAttribs);
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wglMakeCurrent(DeviceContext, RenderContext);
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wglDeleteContext(DummyContext);
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wglSwapIntervalEXT(1);
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OpenGL_LoadAllFunctions();
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} |