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Diffstat (limited to 'platform/windows/gl_manager_windows.cpp')
| -rw-r--r-- | platform/windows/gl_manager_windows.cpp | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/platform/windows/gl_manager_windows.cpp b/platform/windows/gl_manager_windows.cpp new file mode 100644 index 0000000000..d509ff8c51 --- /dev/null +++ b/platform/windows/gl_manager_windows.cpp @@ -0,0 +1,361 @@ +/*************************************************************************/ +/* gl_manager_windows.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2022 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 *); + +static String format_error_message(DWORD id) { + LPWSTR messageBuffer = nullptr; + size_t size = FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, + nullptr, id, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPWSTR)&messageBuffer, 0, nullptr); + + String msg = "Error " + itos(id) + ": " + String::utf16((const char16_t *)messageBuffer, size); + + LocalFree(messageBuffer); + + return msg; +} + +int GLManager_Windows::_find_or_create_display(GLWindow &win) { + // find display NYI, only 1 supported so far + if (_displays.size()) { + return 0; + } + + // 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_at(new_display_id); + return -1; + } + + return new_display_id; +} + +static Error _configure_pixel_format(HDC hDC) { + 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 + }; + + 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 + } + + return OK; +} + +Error GLManager_Windows::_create_context(GLWindow &win, GLDisplay &gl_display) { + Error err = _configure_pixel_format(win.hDC); + if (err != OK) { + return err; + } + + gl_display.hRC = wglCreateContext(win.hDC); + if (!gl_display.hRC) // Are We Able To Get A Rendering Context? + { + return ERR_CANT_CREATE; // Return FALSE + } + + if (!wglMakeCurrent(win.hDC, gl_display.hRC)) { + ERR_PRINT("Could not attach OpenGL context to newly created window: " + format_error_message(GetLastError())); + } + + 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(win.hDC, 0, attribs); + if (!new_hRC) { + wglDeleteContext(gl_display.hRC); + gl_display.hRC = 0; + return ERR_CANT_CREATE; + } + + if (!wglMakeCurrent(win.hDC, nullptr)) { + ERR_PRINT("Could not detach OpenGL context from newly created window: " + format_error_message(GetLastError())); + } + + wglDeleteContext(gl_display.hRC); + gl_display.hRC = new_hRC; + + if (!wglMakeCurrent(win.hDC, gl_display.hRC)) // Try To Activate The Rendering Context + { + ERR_PRINT("Could not attach OpenGL context to newly created window with replaced OpenGL context: " + format_error_message(GetLastError())); + wglDeleteContext(gl_display.hRC); + gl_display.hRC = 0; + return ERR_CANT_CREATE; + } + + 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; + } + + // configure the HDC to use a compatible pixel format + Error result = _configure_pixel_format(hDC); + if (result != OK) { + return result; + } + + GLWindow win; + 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) { + return FAILED; + } + + // WARNING: p_window_id is an eternally growing integer since popup windows keep coming and going + // and each of them has a higher id than the previous, so it must be used in a map not a vector + _windows[p_window_id] = win; + + // make current + window_make_current(p_window_id); + + 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); + if (_current_window == &win) { + _current_window = nullptr; + } + _windows.erase(p_window_id); +} + +void GLManager_Windows::release_current() { + if (!_current_window) { + return; + } + + if (!wglMakeCurrent(_current_window->hDC, nullptr)) { + ERR_PRINT("Could not detach OpenGL context from window marked current: " + format_error_message(GetLastError())); + } +} + +void GLManager_Windows::window_make_current(DisplayServer::WindowID p_window_id) { + if (p_window_id == -1) { + return; + } + + // crash if our data structures are out of sync, i.e. not found + GLWindow &win = _windows[p_window_id]; + + // noop + if (&win == _current_window) { + return; + } + + const GLDisplay &disp = get_display(win.gldisplay_id); + if (!wglMakeCurrent(win.hDC, disp.hRC)) { + ERR_PRINT("Could not switch OpenGL context to other window: " + format_error_message(GetLastError())); + } + + _internal_set_current_window(&win); +} + +void GLManager_Windows::make_current() { + if (!_current_window) { + return; + } + const GLDisplay &disp = get_current_display(); + if (!wglMakeCurrent(_current_window->hDC, disp.hRC)) { + ERR_PRINT("Could not switch OpenGL context to window marked current: " + format_error_message(GetLastError())); + } +} + +void GLManager_Windows::swap_buffers() { + // on other platforms, OpenGL swaps buffers for all windows (on all displays, really?) + // Windows swaps buffers on a per-window basis + // REVISIT: this could be structurally bad, should we have "dirty" flags then? + for (KeyValue<DisplayServer::WindowID, GLWindow> &entry : _windows) { + SwapBuffers(entry.value.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 |