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/*************************************************************************/
/* context_gl_win.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#if defined(OPENGL_ENABLED) || defined(LEGACYGL_ENABLED) || defined(GLES2_ENABLED)
//
// C++ Implementation: context_gl_x11
//
// Description:
//
//
// Author: Juan Linietsky <reduzio@gmail.com>, (C) 2008
//
// Copyright: See COPYING file that comes with this distribution
//
//
#include "context_gl_win.h"
//#include "drivers/opengl/glwrapper.h"
//#include "ctxgl_procaddr.h"
#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
#define WGL_CONTEXT_FLAGS_ARB 0x2094
#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
typedef HGLRC(APIENTRY *PFNWGLCREATECONTEXTATTRIBSARBPROC)(HDC, HGLRC, const int *);
void ContextGL_Win::release_current() {
wglMakeCurrent(hDC, NULL);
}
void ContextGL_Win::make_current() {
wglMakeCurrent(hDC, hRC);
}
int ContextGL_Win::get_window_width() {
return OS::get_singleton()->get_video_mode().width;
}
int ContextGL_Win::get_window_height() {
return OS::get_singleton()->get_video_mode().height;
}
void ContextGL_Win::swap_buffers() {
SwapBuffers(hDC);
}
/*
static GLWrapperFuncPtr wrapper_get_proc_address(const char* p_function) {
print_line(String()+"getting proc of: "+p_function);
GLWrapperFuncPtr func=(GLWrapperFuncPtr)get_gl_proc_address(p_function);
if (!func) {
print_line("Couldn't find function: "+String(p_function));
print_line("error: "+itos(GetLastError()));
}
return func;
}
*/
void ContextGL_Win::set_use_vsync(bool p_use) {
if (wglSwapIntervalEXT) {
wglSwapIntervalEXT(p_use ? 1 : 0);
}
use_vsync = p_use;
}
bool ContextGL_Win::is_using_vsync() const {
return use_vsync;
}
#define _WGL_CONTEXT_DEBUG_BIT_ARB 0x0001
Error ContextGL_Win::initialize() {
static PIXELFORMATDESCRIPTOR pfd = {
sizeof(PIXELFORMATDESCRIPTOR), // Size Of This Pixel Format Descriptor
1,
PFD_DRAW_TO_WINDOW | // Format Must Support Window
PFD_SUPPORT_OPENGL | // Format Must Support OpenGL
PFD_DOUBLEBUFFER,
PFD_TYPE_RGBA,
24,
0, 0, 0, 0, 0, 0, // Color Bits Ignored
0, // No Alpha Buffer
0, // Shift Bit Ignored
0, // No Accumulation Buffer
0, 0, 0, 0, // Accumulation Bits Ignored
24, // 24Bit Z-Buffer (Depth Buffer)
0, // No Stencil Buffer
0, // No Auxiliary Buffer
PFD_MAIN_PLANE, // Main Drawing Layer
0, // Reserved
0, 0, 0 // Layer Masks Ignored
};
if (!(hDC = GetDC(hWnd))) {
MessageBox(NULL, "Can't Create A GL Device Context.", "ERROR", MB_OK | MB_ICONEXCLAMATION);
return ERR_CANT_CREATE; // Return FALSE
}
if (!(pixel_format = ChoosePixelFormat(hDC, &pfd))) // Did Windows Find A Matching Pixel Format?
{
MessageBox(NULL, "Can't Find A Suitable pixel_format.", "ERROR", MB_OK | MB_ICONEXCLAMATION);
return ERR_CANT_CREATE; // Return FALSE
}
if (!SetPixelFormat(hDC, pixel_format, &pfd)) // Are We Able To Set The Pixel Format?
{
MessageBox(NULL, "Can't Set The pixel_format.", "ERROR", MB_OK | MB_ICONEXCLAMATION);
return ERR_CANT_CREATE; // Return FALSE
}
if (!(hRC = wglCreateContext(hDC))) // Are We Able To Get A Rendering Context?
{
MessageBox(NULL, "Can't Create A Temporary GL Rendering Context.", "ERROR", MB_OK | MB_ICONEXCLAMATION);
return ERR_CANT_CREATE; // Return FALSE
}
wglMakeCurrent(hDC, hRC);
if (opengl_3_context) {
int attribs[] = {
WGL_CONTEXT_MAJOR_VERSION_ARB, 3, //we want a 3.3 context
WGL_CONTEXT_MINOR_VERSION_ARB, 3,
//and it shall be forward compatible so that we can only use up to date functionality
WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB | _WGL_CONTEXT_DEBUG_BIT_ARB,
0
}; //zero indicates the end of the array
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB = NULL; //pointer to the method
wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)wglGetProcAddress("wglCreateContextAttribsARB");
if (wglCreateContextAttribsARB == NULL) //OpenGL 3.0 is not supported
{
MessageBox(NULL, "Cannot get Proc Address for CreateContextAttribs", "ERROR", MB_OK | MB_ICONEXCLAMATION);
wglDeleteContext(hRC);
return ERR_CANT_CREATE;
}
HGLRC new_hRC;
if (!(new_hRC = wglCreateContextAttribsARB(hDC, 0, attribs))) {
wglDeleteContext(hRC);
MessageBox(NULL, "Can't Create An OpenGL 3.3 Rendering Context.", "ERROR", MB_OK | MB_ICONEXCLAMATION);
return ERR_CANT_CREATE; // Return false
}
wglMakeCurrent(hDC, NULL);
wglDeleteContext(hRC);
hRC = new_hRC;
if (!wglMakeCurrent(hDC, hRC)) // Try To Activate The Rendering Context
{
MessageBox(NULL, "Can't Activate The GL 3.3 Rendering Context.", "ERROR", MB_OK | MB_ICONEXCLAMATION);
return ERR_CANT_CREATE; // Return FALSE
}
printf("Activated GL 3.3 context");
}
wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)wglGetProcAddress("wglSwapIntervalEXT");
//glWrapperInit(wrapper_get_proc_address);
return OK;
}
ContextGL_Win::ContextGL_Win(HWND hwnd, bool p_opengl_3_context) {
opengl_3_context = p_opengl_3_context;
hWnd = hwnd;
use_vsync = false;
}
ContextGL_Win::~ContextGL_Win() {
}
#endif
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