godot/platform/windows/gl_manager_windows.cpp
2021-11-10 15:13:05 +01:00

347 lines
11 KiB
C++

/*************************************************************************/
/* gl_manager_windows.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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. */
/*************************************************************************/
#include "gl_manager_windows.h"
#ifdef WINDOWS_ENABLED
#ifdef GLES3_ENABLED
#include <stdio.h>
#include <stdlib.h>
#include <dwmapi.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
#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
#define _WGL_CONTEXT_DEBUG_BIT_ARB 0x0001
#if defined(__GNUC__)
// Workaround GCC warning from -Wcast-function-type.
#define wglGetProcAddress (void *)wglGetProcAddress
#endif
typedef HGLRC(APIENTRY *PFNWGLCREATECONTEXTATTRIBSARBPROC)(HDC, HGLRC, const int *);
int GLManager_Windows::_find_or_create_display(GLWindow &win) {
// find display NYI, only 1 supported so far
if (_displays.size())
return 0;
// for (unsigned int n = 0; n < _displays.size(); n++) {
// const GLDisplay &d = _displays[n];
// if (d.x11_display == p_x11_display)
// return n;
// }
// create
GLDisplay d_temp = {};
_displays.push_back(d_temp);
int new_display_id = _displays.size() - 1;
// create context
GLDisplay &d = _displays[new_display_id];
Error err = _create_context(win, d);
if (err != OK) {
// not good
// delete the _display?
_displays.remove(new_display_id);
return -1;
}
return new_display_id;
}
Error GLManager_Windows::_create_context(GLWindow &win, GLDisplay &gl_display) {
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,
(BYTE)PFD_TYPE_RGBA,
(BYTE)(OS::get_singleton()->is_layered_allowed() ? 32 : 24),
(BYTE)0, (BYTE)0, (BYTE)0, (BYTE)0, (BYTE)0, (BYTE)0, // Color Bits Ignored
(BYTE)(OS::get_singleton()->is_layered_allowed() ? 8 : 0), // Alpha Buffer
(BYTE)0, // Shift Bit Ignored
(BYTE)0, // No Accumulation Buffer
(BYTE)0, (BYTE)0, (BYTE)0, (BYTE)0, // Accumulation Bits Ignored
(BYTE)24, // 24Bit Z-Buffer (Depth Buffer)
(BYTE)0, // No Stencil Buffer
(BYTE)0, // No Auxiliary Buffer
(BYTE)PFD_MAIN_PLANE, // Main Drawing Layer
(BYTE)0, // Reserved
0, 0, 0 // Layer Masks Ignored
};
// alias
HDC hDC = win.hDC;
int pixel_format = ChoosePixelFormat(hDC, &pfd);
if (!pixel_format) // Did Windows Find A Matching Pixel Format?
{
return ERR_CANT_CREATE; // Return FALSE
}
BOOL ret = SetPixelFormat(hDC, pixel_format, &pfd);
if (!ret) // Are We Able To Set The Pixel Format?
{
return ERR_CANT_CREATE; // Return FALSE
}
gl_display.hRC = wglCreateContext(hDC);
if (!gl_display.hRC) // Are We Able To Get A Rendering Context?
{
return ERR_CANT_CREATE; // Return FALSE
}
wglMakeCurrent(hDC, gl_display.hRC);
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_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
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 = nullptr; //pointer to the method
wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)wglGetProcAddress("wglCreateContextAttribsARB");
if (wglCreateContextAttribsARB == nullptr) //OpenGL 3.0 is not supported
{
wglDeleteContext(gl_display.hRC);
gl_display.hRC = 0;
return ERR_CANT_CREATE;
}
HGLRC new_hRC = wglCreateContextAttribsARB(hDC, 0, attribs);
if (!new_hRC) {
wglDeleteContext(gl_display.hRC);
gl_display.hRC = 0;
return ERR_CANT_CREATE; // Return false
}
wglMakeCurrent(hDC, nullptr);
wglDeleteContext(gl_display.hRC);
gl_display.hRC = new_hRC;
if (!wglMakeCurrent(hDC, gl_display.hRC)) // Try To Activate The Rendering Context
{
wglDeleteContext(gl_display.hRC);
gl_display.hRC = 0;
return ERR_CANT_CREATE; // Return FALSE
}
return OK;
}
Error GLManager_Windows::window_create(DisplayServer::WindowID p_window_id, HWND p_hwnd, HINSTANCE p_hinstance, int p_width, int p_height) {
HDC hdc = GetDC(p_hwnd);
if (!hdc) {
return ERR_CANT_CREATE; // Return FALSE
}
// make sure vector is big enough...
// we can mirror the external vector, it is simpler
// to keep the IDs identical for fast lookup
if (p_window_id >= (int)_windows.size()) {
_windows.resize(p_window_id + 1);
}
GLWindow &win = _windows[p_window_id];
win.in_use = true;
win.window_id = p_window_id;
win.width = p_width;
win.height = p_height;
win.hwnd = p_hwnd;
win.hDC = hdc;
win.gldisplay_id = _find_or_create_display(win);
if (win.gldisplay_id == -1) {
// release DC?
_windows.remove(_windows.size() - 1);
return FAILED;
}
// make current
window_make_current(_windows.size() - 1);
return OK;
}
void GLManager_Windows::_internal_set_current_window(GLWindow *p_win) {
_current_window = p_win;
}
void GLManager_Windows::window_resize(DisplayServer::WindowID p_window_id, int p_width, int p_height) {
get_window(p_window_id).width = p_width;
get_window(p_window_id).height = p_height;
}
int GLManager_Windows::window_get_width(DisplayServer::WindowID p_window_id) {
return get_window(p_window_id).width;
}
int GLManager_Windows::window_get_height(DisplayServer::WindowID p_window_id) {
return get_window(p_window_id).height;
}
void GLManager_Windows::window_destroy(DisplayServer::WindowID p_window_id) {
GLWindow &win = get_window(p_window_id);
win.in_use = false;
if (_current_window == &win) {
_current_window = nullptr;
}
}
void GLManager_Windows::release_current() {
if (!_current_window)
return;
wglMakeCurrent(_current_window->hDC, nullptr);
}
void GLManager_Windows::window_make_current(DisplayServer::WindowID p_window_id) {
if (p_window_id == -1)
return;
GLWindow &win = _windows[p_window_id];
if (!win.in_use)
return;
// noop
if (&win == _current_window)
return;
const GLDisplay &disp = get_display(win.gldisplay_id);
wglMakeCurrent(win.hDC, disp.hRC);
_internal_set_current_window(&win);
}
void GLManager_Windows::make_current() {
if (!_current_window)
return;
if (!_current_window->in_use) {
WARN_PRINT("current window not in use!");
return;
}
const GLDisplay &disp = get_current_display();
wglMakeCurrent(_current_window->hDC, disp.hRC);
}
void GLManager_Windows::swap_buffers() {
// NO NEED TO CALL SWAP BUFFERS for each window...
// see https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glXSwapBuffers.xml
if (!_current_window)
return;
if (!_current_window->in_use) {
WARN_PRINT("current window not in use!");
return;
}
// print_line("\tswap_buffers");
// only for debugging without drawing anything
// glClearColor(Math::randf(), 0, 1, 1);
//glClear(GL_COLOR_BUFFER_BIT);
// const GLDisplay &disp = get_current_display();
SwapBuffers(_current_window->hDC);
}
Error GLManager_Windows::initialize() {
wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)wglGetProcAddress("wglSwapIntervalEXT");
wglGetSwapIntervalEXT = (PFNWGLGETSWAPINTERVALEXTPROC)wglGetProcAddress("wglGetSwapIntervalEXT");
//glWrapperInit(wrapper_get_proc_address);
return OK;
}
void GLManager_Windows::set_use_vsync(bool p_use) {
/*
static bool setup = false;
static PFNGLXSWAPINTERVALEXTPROC glXSwapIntervalEXT = nullptr;
static PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalMESA = nullptr;
static PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalSGI = nullptr;
if (!setup) {
setup = true;
String extensions = glXQueryExtensionsString(x11_display, DefaultScreen(x11_display));
if (extensions.find("GLX_EXT_swap_control") != -1)
glXSwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalEXT");
if (extensions.find("GLX_MESA_swap_control") != -1)
glXSwapIntervalMESA = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalMESA");
if (extensions.find("GLX_SGI_swap_control") != -1)
glXSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalSGI");
}
int val = p_use ? 1 : 0;
if (glXSwapIntervalMESA) {
glXSwapIntervalMESA(val);
} else if (glXSwapIntervalSGI) {
glXSwapIntervalSGI(val);
} else if (glXSwapIntervalEXT) {
GLXDrawable drawable = glXGetCurrentDrawable();
glXSwapIntervalEXT(x11_display, drawable, val);
} else
return;
use_vsync = p_use;
*/
}
bool GLManager_Windows::is_using_vsync() const {
return use_vsync;
}
GLManager_Windows::GLManager_Windows(ContextType p_context_type) {
context_type = p_context_type;
direct_render = false;
glx_minor = glx_major = 0;
use_vsync = false;
_current_window = nullptr;
}
GLManager_Windows::~GLManager_Windows() {
release_current();
}
#endif // GLES3_ENABLED
#endif // WINDOWS