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win32_gl.h
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win32_gl.h
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#ifndef _WIN32_GL_H_
#define _WIN32_GL_H_
#include <gl/GL.h>
#include <gl/glext.h>
#include <gl/wglext.h>
#include <gl/glcorearb.h>
#ifndef MEMSET
#define MEMSET(ptr, val, size) memset(ptr, val, size)
#endif
#ifndef MEMCPY
#define MEMCPY(ptr_a, ptr_b, size) memcpy(ptr_a, ptr_b, size);
#endif
static HMODULE ogl_instance;
#pragma warning (disable : /* Data ptr to func ptr cast */ 4055 4054)
#define WIN32_LOAD_GL_EXT(E, F) ((F) = ((E)__win32_load_gl_ext((#F))))
static void * __win32_load_gl_ext(char *func_name)
{
void *func_ptr = (void *) wglGetProcAddress(func_name);
if(func_ptr == (void *) 0 ||
(func_ptr == (void *) 0x1) ||
(func_ptr == (void *) 0x2) ||
(func_ptr == (void *) 0x3)) {
func_ptr = (void *) GetProcAddress(ogl_instance, func_name);
}
return func_ptr;
}
#define OPENGL_PROCS_LIST \
OPENGL_LOAD_FUNC(PFNGLACTIVETEXTUREPROC, glActiveTexture) \
OPENGL_LOAD_FUNC(PFNGLCOMPRESSEDTEXIMAGE2DPROC, glCompressedTexImage2D) \
OPENGL_LOAD_FUNC(PFNGLBINDTEXTUREUNITPROC, glBindTextureUnit) \
OPENGL_LOAD_FUNC(PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC, glGetFramebufferAttachmentParameteriv) \
OPENGL_LOAD_FUNC(PFNGLTEXIMAGE2DMULTISAMPLEPROC, glTexImage2DMultisample) \
OPENGL_LOAD_FUNC(PFNGLGETSHADERIVPROC, glGetShaderiv) \
OPENGL_LOAD_FUNC(PFNGLGETSHADERINFOLOGPROC, glGetShaderInfoLog) \
OPENGL_LOAD_FUNC(PFNGLGETPROGRAMIVPROC, glGetProgramiv) \
OPENGL_LOAD_FUNC(PFNGLGETPROGRAMINFOLOGPROC, glGetProgramInfoLog) \
OPENGL_LOAD_FUNC(PFNGLGETUNIFORMLOCATIONPROC, glGetUniformLocation) \
OPENGL_LOAD_FUNC(PFNGLUNIFORMMATRIX4FVPROC, glUniformMatrix4fv) \
OPENGL_LOAD_FUNC(PFNGLUNIFORM1IPROC, glUniform1i) \
OPENGL_LOAD_FUNC(PFNGLUNIFORM1FPROC, glUniform1f) \
OPENGL_LOAD_FUNC(PFNGLUNIFORM2FPROC, glUniform2f) \
OPENGL_LOAD_FUNC(PFNGLUNIFORM3FPROC, glUniform3f) \
OPENGL_LOAD_FUNC(PFNGLUNIFORM4FPROC, glUniform4f) \
OPENGL_LOAD_FUNC(PFNGLUNIFORM3FVPROC, glUniform3fv) \
OPENGL_LOAD_FUNC(PFNGLUNIFORM3UIPROC, glUniform3ui) \
OPENGL_LOAD_FUNC(PFNGLUNIFORM4UIPROC, glUniform4ui) \
OPENGL_LOAD_FUNC(PFNGLSHADERSOURCEPROC, glShaderSource) \
OPENGL_LOAD_FUNC(PFNGLCREATESHADERPROC, glCreateShader) \
OPENGL_LOAD_FUNC(PFNGLCOMPILESHADERPROC, glCompileShader) \
OPENGL_LOAD_FUNC(PFNGLDELETESHADERPROC, glDeleteShader) \
OPENGL_LOAD_FUNC(PFNGLATTACHSHADERPROC, glAttachShader) \
OPENGL_LOAD_FUNC(PFNGLCREATEPROGRAMPROC, glCreateProgram) \
OPENGL_LOAD_FUNC(PFNGLDELETEPROGRAMPROC, glDeleteProgram) \
OPENGL_LOAD_FUNC(PFNGLLINKPROGRAMPROC, glLinkProgram) \
OPENGL_LOAD_FUNC(PFNGLUSEPROGRAMPROC, glUseProgram) \
OPENGL_LOAD_FUNC(PFNGLGETATTACHEDSHADERSPROC, glGetAttachedShaders) \
OPENGL_LOAD_FUNC(PFNGLBINDATTRIBLOCATIONPROC, glBindAttribLocation) \
OPENGL_LOAD_FUNC(PFNGLGETPROGRAMRESOURCEIVPROC, glGetProgramResourceiv) \
OPENGL_LOAD_FUNC(PFNGLGETPROGRAMINTERFACEIVPROC, glGetProgramInterfaceiv) \
OPENGL_LOAD_FUNC(PFNGLGETPROGRAMRESOURCENAMEPROC, glGetProgramResourceName) \
OPENGL_LOAD_FUNC(PFNGLBLENDEQUATIONPROC, glBlendEquation) \
OPENGL_LOAD_FUNC(PFNGLGENFRAMEBUFFERSPROC, glGenFramebuffers) \
OPENGL_LOAD_FUNC(PFNGLBINDFRAMEBUFFERPROC, glBindFramebuffer) \
OPENGL_LOAD_FUNC(PFNGLFRAMEBUFFERRENDERBUFFERPROC, glFramebufferRenderbuffer) \
OPENGL_LOAD_FUNC(PFNGLFRAMEBUFFERTEXTURE2DPROC, glFramebufferTexture2D) \
OPENGL_LOAD_FUNC(PFNGLCHECKFRAMEBUFFERSTATUSPROC, glCheckFramebufferStatus) \
OPENGL_LOAD_FUNC(PFNGLGENVERTEXARRAYSPROC, glGenVertexArrays) \
OPENGL_LOAD_FUNC(PFNGLBINDVERTEXARRAYPROC, glBindVertexArray) \
OPENGL_LOAD_FUNC(PFNGLENABLEVERTEXATTRIBARRAYPROC, glEnableVertexAttribArray) \
OPENGL_LOAD_FUNC(PFNGLVERTEXATTRIBPOINTERPROC, glVertexAttribPointer) \
OPENGL_LOAD_FUNC(PFNGLVERTEXATTRIBIPOINTERPROC, glVertexAttribIPointer) \
OPENGL_LOAD_FUNC(PFNGLDISABLEVERTEXATTRIBARRAYPROC, glDisableVertexAttribArray) \
OPENGL_LOAD_FUNC(PFNGLGENBUFFERSPROC, glGenBuffers) \
OPENGL_LOAD_FUNC(PFNGLBINDBUFFERPROC, glBindBuffer) \
OPENGL_LOAD_FUNC(PFNGLBUFFERDATAPROC, glBufferData) \
OPENGL_LOAD_FUNC(PFNGLBUFFERSUBDATAPROC, glBufferSubData) \
OPENGL_LOAD_FUNC(PFNGLDELETEVERTEXARRAYSPROC, glDeleteVertexArrays) \
OPENGL_LOAD_FUNC(PFNGLDELETEBUFFERSPROC, glDeleteBuffers) \
OPENGL_LOAD_FUNC(PFNGLGENRENDERBUFFERSPROC, glGenRenderbuffers) \
OPENGL_LOAD_FUNC(PFNGLBINDRENDERBUFFERPROC, glBindRenderbuffer) \
OPENGL_LOAD_FUNC(PFNGLRENDERBUFFERSTORAGEPROC, glRenderbufferStorage) \
OPENGL_LOAD_FUNC(PFNGLDRAWBUFFERSPROC, glDrawBuffers) \
OPENGL_LOAD_FUNC(PFNGLMAPBUFFERPROC, glMapBuffer) \
OPENGL_LOAD_FUNC(PFNGLUNMAPBUFFERPROC, glUnmapBuffer) \
OPENGL_LOAD_FUNC(PFNGLUNMAPNAMEDBUFFERPROC, glUnmapNamedBuffer) \
OPENGL_LOAD_FUNC(PFNGLMAPBUFFERRANGEPROC, glMapBufferRange) \
OPENGL_LOAD_FUNC(PFNGLFRAMEBUFFERTEXTUREPROC, glFramebufferTexture) \
OPENGL_LOAD_FUNC(PFNGLGETBUFFERSUBDATAPROC, glGetBufferSubData) \
OPENGL_LOAD_FUNC(PFNGLDELETEFRAMEBUFFERSPROC, glDeleteFramebuffers) \
OPENGL_LOAD_FUNC(PFNGLBINDBUFFERRANGEPROC, glBindBufferRange) \
OPENGL_LOAD_FUNC(PFNGLVERTEXATTRIBDIVISORPROC, glVertexAttribDivisor) \
OPENGL_LOAD_FUNC(PFNGLDRAWARRAYSINSTANCEDPROC, glDrawArraysInstanced) \
OPENGL_LOAD_FUNC(PFNGLGETBUFFERPARAMETERIVPROC, glGetBufferParameteriv) \
OPENGL_LOAD_FUNC(PFNGLBLITFRAMEBUFFERPROC, glBlitFramebuffer) \
OPENGL_LOAD_FUNC(PFNGLPRIMITIVERESTARTINDEXPROC, glPrimitiveRestartIndex) \
OPENGL_LOAD_FUNC(PFNGLBLENDFUNCSEPARATEPROC, glBlendFuncSeparate) \
OPENGL_LOAD_FUNC(PFNGLDRAWELEMENTSBASEVERTEXPROC, glDrawElementsBaseVertex) \
OPENGL_LOAD_FUNC(PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXPROC, glDrawElementsInstancedBaseVertex) \
OPENGL_LOAD_FUNC(PFNGLDRAWELEMENTSINSTANCEDPROC, glDrawElementsInstanced) \
OPENGL_LOAD_FUNC(PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC, glRenderbufferStorageMultisample) \
OPENGL_LOAD_FUNC(PFNGLBLITNAMEDFRAMEBUFFERPROC, glBlitNamedFramebuffer) \
OPENGL_LOAD_FUNC(PFNGLBLENDCOLORPROC, glBlendColor) \
OPENGL_LOAD_FUNC(PFNWGLCHOOSEPIXELFORMATARBPROC, wglChoosePixelFormatARB) \
OPENGL_LOAD_FUNC(PFNWGLCREATECONTEXTATTRIBSARBPROC, wglCreateContextAttribsARB) \
OPENGL_LOAD_FUNC(PFNWGLSWAPINTERVALEXTPROC, wglSwapIntervalEXT) \
OPENGL_LOAD_FUNC(PFNGLBINDRENDERBUFFERPROC, glBindRenderBuffer) \
OPENGL_LOAD_FUNC(PFNGLGENRENDERBUFFERSPROC, glGenRenderBuffers) \
OPENGL_LOAD_FUNC(PFNGLRENDERBUFFERSTORAGEPROC, glRenderBufferStorage) \
OPENGL_LOAD_FUNC(PFNGLBINDFRAGDATALOCATIONINDEXEDPROC, glBindFragDataLocationIndexed) \
OPENGL_LOAD_FUNC(PFNGLADDSWAPHINTRECTWINPROC, glAddSwapHintRectWIN) \
OPENGL_LOAD_FUNC(PFNGLGETTEXTUREIMAGEPROC, glGetTextureImage) \
OPENGL_LOAD_FUNC(PFNGLDEBUGMESSAGECALLBACKPROC, glDebugMessageCallback) \
OPENGL_LOAD_FUNC(PFNGLGENERATEMIPMAPPROC, glGenerateMipmap) \
/* end */
#define OPENGL_LOAD_FUNC(type, name) type name;
OPENGL_PROCS_LIST
#undef OPENGL_LOAD_FUNC
static void win32_load_ogl_exts()
{
#define OPENGL_LOAD_FUNC(type, name) WIN32_LOAD_GL_EXT(type, name);
OPENGL_PROCS_LIST
#undef OPENGL_LOAD_FUNC
}
typedef HGLRC WINAPI PFN_wglCreateContextAttribsARB(HDC hDC, HGLRC hShareContext,
const int *attribList);
typedef BOOL WINAPI PFN_wglGetPixelFormatAttribivARB(HDC hdc,
int iPixelFormat,
int iLayerPlane,
UINT nAttributes,
const int *piAttributes,
int *piValues);
typedef BOOL WINAPI PFN_wglChoosePixelFormatARB(HDC hdc,
const int *piAttribIList,
const FLOAT *pfAttribFList,
UINT nMaxFormats,
int *piFormats,
UINT *nNumFormats);
typedef BOOL WINAPI PFN_wglGetPixelFormatAttribfvARB(HDC hdc,
int iPixelFormat,
int iLayerPlane,
UINT nAttributes,
const int *piAttributes,
FLOAT *pfValues);
static BOOL win32_make_gl_window(LPCTSTR title,
DWORD width, DWORD height,
BYTE bpp_count,
BYTE depth_bit_count,
BYTE stencil_bit_count,
WNDPROC proc,
HWND * out_handle,
HGLRC * out_glctx,
HDC * out_dc)
{
HINSTANCE instance = GetModuleHandle(NULL);
HANDLE handle = 0;
HGLRC glctx = 0;
HDC dc = 0;
BOOL done = FALSE;
WNDCLASS wnd_class;
ogl_instance = LoadLibrary("opengl32.dll");
if(!ogl_instance) {
return FALSE;
}
MEMSET(&wnd_class, 0, sizeof(wnd_class));
wnd_class.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
wnd_class.lpfnWndProc = proc;
wnd_class.hInstance = GetModuleHandle(NULL);
wnd_class.lpszClassName = "win32_window_class_name";
wnd_class.hIcon = NULL;
if(RegisterClassA(&wnd_class)) {
RECT wnd_rect;
int ext_style = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
int wnd_style = WS_OVERLAPPEDWINDOW;
wnd_rect.left = 0;
wnd_rect.top = 0;
wnd_rect.right = width;
wnd_rect.bottom = height;
AdjustWindowRectEx(&wnd_rect, wnd_style, 0, ext_style);
width = wnd_rect.right - wnd_rect.left;
height = wnd_rect.bottom - wnd_rect.top;
handle = CreateWindowEx(ext_style, wnd_class.lpszClassName,
title, wnd_style,
CW_USEDEFAULT, CW_USEDEFAULT,
width, height,
0, 0, instance, 0);
if(handle) {
PIXELFORMATDESCRIPTOR pxfmt_data;
int pxfmt;
UINT fmt_count;
INT ctx_attribs[] = {
WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
WGL_CONTEXT_MINOR_VERSION_ARB, 0,
WGL_CONTEXT_FLAGS_ARB, 0, //WGL_CONTEXT_DEBUG_BIT_ARB,
WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
0,
};
INT int_attribs[] = {
WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
WGL_COLOR_BITS_ARB, 24,
WGL_ALPHA_BITS_ARB, 8,
WGL_DEPTH_BITS_ARB, 16,
WGL_STENCIL_BITS_ARB, 0,
WGL_SAMPLE_BUFFERS_ARB, GL_TRUE,
WGL_SAMPLES_ARB, 0,
0,
};
#if 0
switch(0) {
case 2:
int_attribs[19] = 2;
break;
case 4:
int_attribs[19] = 4;
break;
case 9:
int_attribs[19] = 8;
break;
}
#endif
MEMSET(&pxfmt, 0, sizeof(pxfmt));
pxfmt_data.nSize = sizeof(pxfmt);
pxfmt_data.nVersion = 1;
pxfmt_data.dwFlags = PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_DOUBLEBUFFER|PFD_SWAP_COPY;
pxfmt_data.iPixelType = PFD_TYPE_RGBA;
pxfmt_data.cColorBits = bpp_count;
pxfmt_data.cDepthBits = depth_bit_count;
pxfmt_data.cStencilBits = stencil_bit_count;
pxfmt_data.iLayerType = PFD_MAIN_PLANE;
dc = GetDC(handle);
done = SetPixelFormat(dc, ChoosePixelFormat(dc, &pxfmt_data), &pxfmt_data);
ASSERT(done);
glctx = wglCreateContext(dc);
ASSERT(glctx);
done = wglMakeCurrent(dc, glctx);
ASSERT(done);
WIN32_LOAD_GL_EXT(PFNWGLCREATECONTEXTATTRIBSARBPROC, wglCreateContextAttribsARB);
WIN32_LOAD_GL_EXT(PFNWGLCHOOSEPIXELFORMATARBPROC, wglChoosePixelFormatARB);
WIN32_LOAD_GL_EXT(PFNWGLSWAPINTERVALEXTPROC, wglSwapIntervalEXT);
// Cleaning up
//
done = wglMakeCurrent(NULL, NULL);
ASSERT(done);
done = wglDeleteContext(glctx);
ASSERT(done);
done = ReleaseDC(handle, dc);
ASSERT(done);
done = DestroyWindow(handle);
ASSERT(done);
// Creating usable OpenGL context.
//
handle = CreateWindowEx(ext_style, wnd_class.lpszClassName, title, wnd_style, CW_USEDEFAULT, CW_USEDEFAULT, width, height, 0, 0, instance, 0);
ASSERT(handle);
dc = GetDC(handle);
ASSERT(dc);
done = wglChoosePixelFormatARB(dc, int_attribs, 0, 1, &pxfmt, &fmt_count);
if(!done || fmt_count == 0) {
pxfmt = ChoosePixelFormat(dc, &pxfmt_data);
}
done = SetPixelFormat(dc, pxfmt, &pxfmt_data);
ASSERT(done);
glctx = wglCreateContextAttribsARB(dc, 0, ctx_attribs);
ASSERT(glctx);
done = wglMakeCurrent(dc, glctx);
ASSERT(done);
if(wglSwapIntervalEXT) {
wglSwapIntervalEXT(0);
}
}
}
if(done) {
*out_handle = handle;
*out_glctx = glctx;
*out_dc = dc;
} else {
UnregisterClassA("win32_window_class_name", instance);
}
return done;
}
#endif