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static void
init_opengl_extensions(void)
{
// Before we can load extensions, we need a dummy OpenGL context, created using a dummy window.
// We use a dummy window because you can only set the pixel format for a window once. For the
// real window, we want to use wglChoosePixelFormatARB (so we can potentially specify options
// that aren't available in PIXELFORMATDESCRIPTOR), but we can't load and use that before we
// have a context.
WNDCLASSA window_class = { 0 };
window_class.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
window_class.lpfnWndProc = DefWindowProcA;
window_class.hInstance = GetModuleHandle(0);
window_class.lpszClassName = "Dummy_WGL_djuasiodwa";
if (!RegisterClassA(&window_class)) {
fatal_error("Failed to register dummy OpenGL window.");
}
HWND dummy_window = CreateWindowExA(
0,
window_class.lpszClassName,
"Dummy OpenGL Window",
0,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
0,
0,
window_class.hInstance,
0);
if (!dummy_window) {
fatal_error("Failed to create dummy OpenGL window.");
}
HDC dummy_dc = GetDC(dummy_window);
PIXELFORMATDESCRIPTOR pfd;
pfd.nSize = sizeof(pfd);
pfd.nVersion = 1;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.cColorBits = 32;
pfd.cAlphaBits = 8;
pfd.iLayerType = PFD_MAIN_PLANE;
pfd.cDepthBits = 24;
pfd.cStencilBits = 8;
int pixel_format = ChoosePixelFormat(dummy_dc, &pfd);
if (!pixel_format) {
fatal_error("Failed to find a suitable pixel format.");
}
if (!SetPixelFormat(dummy_dc, pixel_format, &pfd)) {
fatal_error("Failed to set the pixel format.");
}
HGLRC dummy_context = wglCreateContext(dummy_dc);
if (!dummy_context) {
fatal_error("Failed to create a dummy OpenGL rendering context.");
}
if (!wglMakeCurrent(dummy_dc, dummy_context)) {
fatal_error("Failed to activate dummy OpenGL rendering context.");
}
wglCreateContextAttribsARB = (wglCreateContextAttribsARB_type*)wglGetProcAddress(
"wglCreateContextAttribsARB");
wglChoosePixelFormatARB = (wglChoosePixelFormatARB_type*)wglGetProcAddress(
"wglChoosePixelFormatARB");
wglMakeCurrent(dummy_dc, 0);
wglDeleteContext(dummy_context);
ReleaseDC(dummy_window, dummy_dc);
DestroyWindow(dummy_window);
}
void EnableOpenGL(HWND hWnd, HDC* hDC, HGLRC* hRC)
{
init_opengl_extensions();
// get the device context (DC)
/*wglCreateContextAttribsARB = (wglCreateContextAttribsARB_type*)wglGetProcAddress(
"wglCreateContextAttribsARB");
wglChoosePixelFormatARB = (wglChoosePixelFormatARB_type*)wglGetProcAddress(
"wglChoosePixelFormatARB");*/
if ((wglCreateContextAttribsARB != NULL)&&(wglChoosePixelFormatARB!=NULL))
{
*hDC = GetDC(hWnd);
// int pixel_format_attribs[] = {
//WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
//WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
//WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
//WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
//WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
//WGL_SAMPLE_BUFFERS_ARB, GL_TRUE ,
//WGL_COLOR_BITS_ARB, 32,
//WGL_DEPTH_BITS_ARB, 24,
//WGL_STENCIL_BITS_ARB, 8,
//0,0
// };
int pixel_format_attribs[] = {
WGL_SUPPORT_OPENGL_ARB, 1,
WGL_DRAW_TO_WINDOW_ARB, 1,
/*WGL_DRAW_TO_BITMAP_ARB, 1,*/
WGL_DOUBLE_BUFFER_ARB, 1,
//WGL_SWAP_LAYER_BUFFERS_ARB, 1,
WGL_COLOR_BITS_ARB, 32,
WGL_RED_BITS_ARB, 8,
WGL_GREEN_BITS_ARB, 8,
WGL_BLUE_BITS_ARB, 8,
WGL_ALPHA_BITS_ARB, 8,
WGL_DEPTH_BITS_ARB, 8,
WGL_STENCIL_BITS_ARB, 8,
WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
0
};
int pixel_format;
UINT num_formats;
wglChoosePixelFormatARB(*hDC, pixel_format_attribs, 0, 1, &pixel_format, &num_formats);
if (!num_formats) {
fatal_error("Failed to set the OpenGL 3.3 pixel format.");
}
PIXELFORMATDESCRIPTOR pfd;
DescribePixelFormat(*hDC, pixel_format, sizeof(pfd), &pfd);
if (!SetPixelFormat(*hDC, pixel_format, &pfd)) {
fatal_error("Failed to set the OpenGL 3.3 pixel format.");
}
// Specify that we want to create an OpenGL 3.3 core profile context
int gl33_attribs[] = {
WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
WGL_CONTEXT_MINOR_VERSION_ARB, 3,
WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
0,
};
*hRC = wglCreateContextAttribsARB(*hDC, 0, gl33_attribs);
}
else
{
*hRC = wglCreateContext(*hDC);
wglMakeCurrent(*hDC, *hRC);
}
wglMakeCurrent(*hDC, *hRC);
}
#endif
char checkShaderCompilation(GLuint shaderID)
{
GLint compilationStatus = 0;
// Vérification de la compilation pour le vertex shader
glGetShaderiv(opengl.vertexID, GL_COMPILE_STATUS, &compilationStatus);
//if (compilationStatus != GL_TRUE)
{
// Nous savons que la compilation a échoué, donc nous devons savoir pourquoi
// Nous devons récupéré la taille du log
GLint logLength = 0;
char* log = NULL;
glGetShaderiv(shaderID, GL_INFO_LOG_LENGTH, &logLength);
if (logLength > 0)
{
// Maintenant que nous avons la taille, nous pouvons alloué la mémoire suffisante pour ce log
log = (char*)malloc(logLength);
if (log == NULL)
{
fprintf(stderr, "Erreur d'allocation de mémoire pour le log de la compilation du shader\n");
return 0;
}
glGetShaderInfoLog(shaderID, logLength, &logLength, log);
// On peut afficher le message
fprintf(stderr, "Erreur de compilation:\n%s", log);
MessageBox(NULL, log, NULL, MB_ICONHAND);
// Et on n'oublie pas de libéré la mémoire
free(log);
return 0;
}
else
return 1;
}
return 1; // Pas d'erreur
} |
wglCreateContextAttribsARB ne fonctionne pas
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