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#define GR3_WIN_C
#include "gr3.h"
#include "gr3_win.h"
#include "gr3_internals.h"
/* OpenGL Context creation on windows */
static HINSTANCE g_hInstance;
static HWND hWnd;
static HDC dc;
static HGLRC glrc;
BOOL APIENTRY DllMain(HINSTANCE hInstance, DWORD fdwReason, LPVOID lpvReserved)
{
(void)lpvReserved;
if (fdwReason == DLL_PROCESS_ATTACH)
{
g_hInstance = hInstance;
/*fprintf(stderr,"DLL attached to a process\n");*/
}
return TRUE;
}
int gr3_initGL_WIN_(void)
{
WNDCLASS wndclass;
gr3_log_("gr3_initGL_WIN_();");
glrc = wglGetCurrentContext();
if (!glrc)
{
/* Register the frame class */
wndclass.style = 0;
wndclass.lpfnWndProc = DefWindowProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = g_hInstance;
wndclass.hIcon = NULL;
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = NULL;
wndclass.lpszMenuName = "OpenGLWindow";
wndclass.lpszClassName = "OpenGLWindow";
if (RegisterClass(&wndclass))
{
/*fprintf(stderr,"Window Class registered successfully.\n"); */
}
else
{
gr3_log_("failed to register a window class");
return FALSE;
}
hWnd = CreateWindow("OpenGLWindow", "Generic OpenGL Sample", 0, 0, 0, 1, 1, NULL, NULL, g_hInstance, NULL);
if (hWnd != NULL)
{
/*fprintf(stderr,"Window created successfully.\n"); */
}
else
{
gr3_log_("failed to create a window");
RETURN_ERROR(GR3_ERROR_INIT_FAILED);
}
dc = GetDC(hWnd);
/* Pixel Format selection */ {
PIXELFORMATDESCRIPTOR pfd;
int iPixelFormat;
BOOL result;
memset(&pfd, 0, sizeof(pfd));
pfd.nSize = sizeof(pfd);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cAlphaBits = 8;
pfd.cDepthBits = 24;
pfd.iLayerType = PFD_MAIN_PLANE;
iPixelFormat = ChoosePixelFormat(dc, &pfd);
result = SetPixelFormat(dc, iPixelFormat, &pfd);
if (result)
{
/*fprintf(stderr,"Pixel Format set for Device Context successfully.\n");*/
}
else
{
gr3_log_("failed to set a pixel format for the device context");
RETURN_ERROR(GR3_ERROR_INIT_FAILED);
}
}
/* OpenGL Rendering Context creation */ {
BOOL result;
glrc = wglCreateContext(dc);
if (glrc != NULL)
{
/*fprintf(stderr,"OpenGL Rendering Context was created successfully.\n");*/
}
else
{
gr3_log_("failed to create an OpenGL context for the device context");
RETURN_ERROR(GR3_ERROR_INIT_FAILED);
}
result = wglMakeCurrent(dc, glrc);
if (result)
{
/*fprintf(stderr,"OpenGL Rendering Context made current successfully.\n");*/
}
else
{
gr3_log_("failed to make OpenGL context current with the device context");
RETURN_ERROR(GR3_ERROR_INIT_FAILED);
}
}
}
/* Load Function pointers */ {
#ifdef GR3_CAN_USE_VBO
glBufferData = (PFNGLBUFFERDATAPROC)wglGetProcAddress("glBufferData");
glBindBuffer = (PFNGLBINDBUFFERPROC)wglGetProcAddress("glBindBuffer");
glGenBuffers = (PFNGLGENBUFFERSPROC)wglGetProcAddress("glGenBuffers");
glDeleteBuffers = (PFNGLGENBUFFERSPROC)wglGetProcAddress("glDeleteBuffers");
glVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERPROC)wglGetProcAddress("glVertexAttribPointer");
glGetAttribLocation = (PFNGLGETATTRIBLOCATIONPROC)wglGetProcAddress("glGetAttribLocation");
glEnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)wglGetProcAddress("glEnableVertexAttribArray");
glUseProgram = (PFNGLUSEPROGRAMPROC)wglGetProcAddress("glUseProgram");
glDeleteShader = (PFNGLDELETESHADERPROC)wglGetProcAddress("glDeleteShader");
glLinkProgram = (PFNGLLINKPROGRAMPROC)wglGetProcAddress("glLinkProgram");
glAttachShader = (PFNGLATTACHSHADERPROC)wglGetProcAddress("glAttachShader");
glCreateShader = (PFNGLCREATESHADERPROC)wglGetProcAddress("glCreateShader");
glCompileShader = (PFNGLCOMPILESHADERPROC)wglGetProcAddress("glCompileShader");
glCreateProgram = (PFNGLCREATEPROGRAMPROC)wglGetProcAddress("glCreateProgram");
glDeleteProgram = (PFNGLDELETEPROGRAMPROC)wglGetProcAddress("glDeleteProgram");
glUniform1i = (PFNGLUNIFORM1IPROC)wglGetProcAddress("glUniform1i");
glUniform3f = (PFNGLUNIFORM3FPROC)wglGetProcAddress("glUniform3f");
glUniform3fv = (PFNGLUNIFORM3FVPROC)wglGetProcAddress("glUniform3fv");
glUniformMatrix4fv = (PFNGLUNIFORMMATRIX4FVPROC)wglGetProcAddress("glUniformMatrix4fv");
glUniform4f = (PFNGLUNIFORM4FPROC)wglGetProcAddress("glUniform4f");
glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)wglGetProcAddress("glGetUniformLocation");
glShaderSource = (PFNGLSHADERSOURCEPROC)wglGetProcAddress("glShaderSource");
glGetShaderiv = (PFNGLGETSHADERIVPROC)wglGetProcAddress("glGetShaderiv");
glGetProgramiv = (PFNGLGETPROGRAMIVPROC)wglGetProcAddress("glGetProgramiv");
glActiveTexture = (PFNGLACTIVETEXTUREPROC)wglGetProcAddress("glActiveTexture");
glTexImage3D = (PFNGLTEXIMAGE3DPROC)wglGetProcAddress("glTexImage3D");
#endif
glDrawBuffers = (PFNGLDRAWBUFFERSPROC)wglGetProcAddress("glDrawBuffers");
glBlendColor = (PFNGLBLENDCOLORPROC)wglGetProcAddress("glBlendColor");
#ifdef GL_ARB_framebuffer_object
glBindRenderbuffer = (PFNGLBINDRENDERBUFFERPROC)wglGetProcAddress("glBindRenderbuffer");
glCheckFramebufferStatus = (PFNGLCHECKFRAMEBUFFERSTATUSPROC)wglGetProcAddress("glCheckFramebufferStatus");
glFramebufferRenderbuffer = (PFNGLFRAMEBUFFERRENDERBUFFERPROC)wglGetProcAddress("glFramebufferRenderbuffer");
glRenderbufferStorage = (PFNGLRENDERBUFFERSTORAGEPROC)wglGetProcAddress("glRenderbufferStorage");
glBindFramebuffer = (PFNGLBINDFRAMEBUFFERPROC)wglGetProcAddress("glBindFramebuffer");
glGenFramebuffers = (PFNGLGENFRAMEBUFFERSPROC)wglGetProcAddress("glGenFramebuffers");
glGenRenderbuffers = (PFNGLGENRENDERBUFFERSPROC)wglGetProcAddress("glGenRenderbuffers");
glDeleteFramebuffers = (PFNGLDELETEFRAMEBUFFERSPROC)wglGetProcAddress("glDeleteFramebuffers");
glDeleteRenderbuffers = (PFNGLDELETERENDERBUFFERSPROC)wglGetProcAddress("glDeleteRenderbuffers");
glFramebufferTexture2D = (PFNGLFRAMEBUFFERTEXTURE2DPROC)wglGetProcAddress("glFramebufferTexture2D");
#endif
#ifdef GL_EXT_framebuffer_object
glBindRenderbufferEXT = (PFNGLBINDRENDERBUFFEREXTPROC)wglGetProcAddress("glBindRenderbufferEXT");
glCheckFramebufferStatusEXT = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)wglGetProcAddress("glCheckFramebufferStatusEXT");
glFramebufferRenderbufferEXT =
(PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC)wglGetProcAddress("glFramebufferRenderbufferEXT");
glRenderbufferStorageEXT = (PFNGLRENDERBUFFERSTORAGEEXTPROC)wglGetProcAddress("glRenderbufferStorageEXT");
glBindFramebufferEXT = (PFNGLBINDFRAMEBUFFEREXTPROC)wglGetProcAddress("glBindFramebufferEXT");
glGenFramebuffersEXT = (PFNGLGENFRAMEBUFFERSEXTPROC)wglGetProcAddress("glGenFramebuffersEXT");
glGenRenderbuffersEXT = (PFNGLGENRENDERBUFFERSEXTPROC)wglGetProcAddress("glGenRenderbuffersEXT");
glDeleteFramebuffersEXT = (PFNGLDELETEFRAMEBUFFERSEXTPROC)wglGetProcAddress("glDeleteFramebuffersEXT");
glDeleteRenderbuffersEXT = (PFNGLDELETERENDERBUFFERSEXTPROC)wglGetProcAddress("glDeleteRenderbuffersEXT");
glFramebufferTexture2DEXT = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)wglGetProcAddress("glFramebufferTexture2DEXT");
#endif
}
context_struct_.terminateGL = gr3_terminateGL_WIN_;
context_struct_.gl_is_initialized = 1;
gr3_appendtorenderpathstring_("Windows");
return GR3_ERROR_NONE;
}
void gr3_terminateGL_WIN_(void)
{
gr3_log_("gr3_terminateGL_WIN_();");
if (dc)
{
wglDeleteContext(glrc);
ReleaseDC(hWnd, dc);
DestroyWindow(hWnd);
UnregisterClass("OpenGLWindow", g_hInstance);
}
}
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