mirror of
https://github.com/glfw/glfw.git
synced 2024-11-10 00:51:47 +00:00
3a0b397054
The DwmFlush workaround for windowed windows on Nvidia caused jitter for full screen windows. The workaround is now only used for windowed mode windows. Fixes #519.
649 lines
20 KiB
C
649 lines
20 KiB
C
//========================================================================
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// GLFW 3.1 WGL - www.glfw.org
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//------------------------------------------------------------------------
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// Copyright (c) 2002-2006 Marcus Geelnard
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// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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#include "internal.h"
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#include <stdlib.h>
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#include <malloc.h>
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#include <assert.h>
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// Initialize WGL-specific extensions
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//
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static void initWGLExtensions(_GLFWwindow* window)
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{
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// Functions for WGL_EXT_extension_string
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// NOTE: These are needed by _glfwPlatformExtensionSupported
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window->wgl.GetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)
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wglGetProcAddress("wglGetExtensionsStringEXT");
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window->wgl.GetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)
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wglGetProcAddress("wglGetExtensionsStringARB");
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// Functions for WGL_ARB_create_context
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window->wgl.CreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)
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wglGetProcAddress("wglCreateContextAttribsARB");
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// Functions for WGL_EXT_swap_control
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window->wgl.SwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)
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wglGetProcAddress("wglSwapIntervalEXT");
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// Functions for WGL_ARB_pixel_format
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window->wgl.GetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC)
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wglGetProcAddress("wglGetPixelFormatAttribivARB");
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// This needs to include every extension used below except for
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// WGL_ARB_extensions_string and WGL_EXT_extensions_string
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window->wgl.ARB_multisample =
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_glfwPlatformExtensionSupported("WGL_ARB_multisample");
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window->wgl.ARB_framebuffer_sRGB =
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_glfwPlatformExtensionSupported("WGL_ARB_framebuffer_sRGB");
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window->wgl.ARB_create_context =
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_glfwPlatformExtensionSupported("WGL_ARB_create_context");
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window->wgl.ARB_create_context_profile =
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_glfwPlatformExtensionSupported("WGL_ARB_create_context_profile");
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window->wgl.EXT_create_context_es2_profile =
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_glfwPlatformExtensionSupported("WGL_EXT_create_context_es2_profile");
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window->wgl.ARB_create_context_robustness =
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_glfwPlatformExtensionSupported("WGL_ARB_create_context_robustness");
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window->wgl.EXT_swap_control =
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_glfwPlatformExtensionSupported("WGL_EXT_swap_control");
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window->wgl.ARB_pixel_format =
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_glfwPlatformExtensionSupported("WGL_ARB_pixel_format");
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window->wgl.ARB_context_flush_control =
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_glfwPlatformExtensionSupported("WGL_ARB_context_flush_control");
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}
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// Returns the specified attribute of the specified pixel format
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//
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static int getPixelFormatAttrib(_GLFWwindow* window, int pixelFormat, int attrib)
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{
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int value = 0;
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assert(window->wgl.ARB_pixel_format);
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if (!window->wgl.GetPixelFormatAttribivARB(window->wgl.dc,
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pixelFormat,
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0, 1, &attrib, &value))
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"WGL: Failed to retrieve pixel format attribute %i",
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attrib);
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return 0;
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}
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return value;
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}
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// Return a list of available and usable framebuffer configs
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//
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static GLboolean choosePixelFormat(_GLFWwindow* window,
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const _GLFWfbconfig* desired,
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int* result)
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{
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_GLFWfbconfig* usableConfigs;
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const _GLFWfbconfig* closest;
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int i, nativeCount, usableCount;
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if (window->wgl.ARB_pixel_format)
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{
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nativeCount = getPixelFormatAttrib(window,
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1,
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WGL_NUMBER_PIXEL_FORMATS_ARB);
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}
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else
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{
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nativeCount = DescribePixelFormat(window->wgl.dc,
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1,
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sizeof(PIXELFORMATDESCRIPTOR),
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NULL);
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}
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usableConfigs = calloc(nativeCount, sizeof(_GLFWfbconfig));
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usableCount = 0;
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for (i = 0; i < nativeCount; i++)
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{
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const int n = i + 1;
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_GLFWfbconfig* u = usableConfigs + usableCount;
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if (window->wgl.ARB_pixel_format)
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{
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// Get pixel format attributes through "modern" extension
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if (!getPixelFormatAttrib(window, n, WGL_SUPPORT_OPENGL_ARB) ||
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!getPixelFormatAttrib(window, n, WGL_DRAW_TO_WINDOW_ARB))
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{
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continue;
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}
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if (getPixelFormatAttrib(window, n, WGL_PIXEL_TYPE_ARB) !=
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WGL_TYPE_RGBA_ARB)
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{
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continue;
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}
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if (getPixelFormatAttrib(window, n, WGL_ACCELERATION_ARB) ==
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WGL_NO_ACCELERATION_ARB)
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{
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continue;
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}
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u->redBits = getPixelFormatAttrib(window, n, WGL_RED_BITS_ARB);
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u->greenBits = getPixelFormatAttrib(window, n, WGL_GREEN_BITS_ARB);
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u->blueBits = getPixelFormatAttrib(window, n, WGL_BLUE_BITS_ARB);
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u->alphaBits = getPixelFormatAttrib(window, n, WGL_ALPHA_BITS_ARB);
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u->depthBits = getPixelFormatAttrib(window, n, WGL_DEPTH_BITS_ARB);
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u->stencilBits = getPixelFormatAttrib(window, n, WGL_STENCIL_BITS_ARB);
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u->accumRedBits = getPixelFormatAttrib(window, n, WGL_ACCUM_RED_BITS_ARB);
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u->accumGreenBits = getPixelFormatAttrib(window, n, WGL_ACCUM_GREEN_BITS_ARB);
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u->accumBlueBits = getPixelFormatAttrib(window, n, WGL_ACCUM_BLUE_BITS_ARB);
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u->accumAlphaBits = getPixelFormatAttrib(window, n, WGL_ACCUM_ALPHA_BITS_ARB);
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u->auxBuffers = getPixelFormatAttrib(window, n, WGL_AUX_BUFFERS_ARB);
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if (getPixelFormatAttrib(window, n, WGL_STEREO_ARB))
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u->stereo = GL_TRUE;
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if (getPixelFormatAttrib(window, n, WGL_DOUBLE_BUFFER_ARB))
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u->doublebuffer = GL_TRUE;
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if (window->wgl.ARB_multisample)
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u->samples = getPixelFormatAttrib(window, n, WGL_SAMPLES_ARB);
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if (window->wgl.ARB_framebuffer_sRGB)
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{
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if (getPixelFormatAttrib(window, n, WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB))
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u->sRGB = GL_TRUE;
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}
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}
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else
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{
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PIXELFORMATDESCRIPTOR pfd;
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// Get pixel format attributes through legacy PFDs
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if (!DescribePixelFormat(window->wgl.dc,
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n,
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sizeof(PIXELFORMATDESCRIPTOR),
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&pfd))
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{
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continue;
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}
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if (!(pfd.dwFlags & PFD_DRAW_TO_WINDOW) ||
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!(pfd.dwFlags & PFD_SUPPORT_OPENGL))
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{
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continue;
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}
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if (!(pfd.dwFlags & PFD_GENERIC_ACCELERATED) &&
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(pfd.dwFlags & PFD_GENERIC_FORMAT))
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{
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continue;
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}
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if (pfd.iPixelType != PFD_TYPE_RGBA)
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continue;
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u->redBits = pfd.cRedBits;
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u->greenBits = pfd.cGreenBits;
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u->blueBits = pfd.cBlueBits;
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u->alphaBits = pfd.cAlphaBits;
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u->depthBits = pfd.cDepthBits;
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u->stencilBits = pfd.cStencilBits;
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u->accumRedBits = pfd.cAccumRedBits;
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u->accumGreenBits = pfd.cAccumGreenBits;
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u->accumBlueBits = pfd.cAccumBlueBits;
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u->accumAlphaBits = pfd.cAccumAlphaBits;
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u->auxBuffers = pfd.cAuxBuffers;
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if (pfd.dwFlags & PFD_STEREO)
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u->stereo = GL_TRUE;
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if (pfd.dwFlags & PFD_DOUBLEBUFFER)
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u->doublebuffer = GL_TRUE;
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}
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u->wgl = n;
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usableCount++;
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}
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if (!usableCount)
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{
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_glfwInputError(GLFW_API_UNAVAILABLE,
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"WGL: The driver does not appear to support OpenGL");
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free(usableConfigs);
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return GL_FALSE;
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}
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closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
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if (!closest)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"WGL: Failed to find a suitable pixel format");
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free(usableConfigs);
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return GL_FALSE;
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}
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*result = closest->wgl;
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free(usableConfigs);
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return GL_TRUE;
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW internal API //////
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//////////////////////////////////////////////////////////////////////////
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// Initialize WGL
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//
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int _glfwInitContextAPI(void)
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{
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if (!_glfwCreateContextTLS())
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return GL_FALSE;
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_glfw.wgl.opengl32.instance = LoadLibraryW(L"opengl32.dll");
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if (!_glfw.wgl.opengl32.instance)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR, "WGL: Failed to load opengl32.dll");
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return GL_FALSE;
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}
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return GL_TRUE;
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}
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// Terminate WGL
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//
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void _glfwTerminateContextAPI(void)
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{
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if (_glfw.wgl.opengl32.instance)
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FreeLibrary(_glfw.wgl.opengl32.instance);
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_glfwDestroyContextTLS();
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}
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#define setWGLattrib(attribName, attribValue) \
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{ \
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attribs[index++] = attribName; \
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attribs[index++] = attribValue; \
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assert((size_t) index < sizeof(attribs) / sizeof(attribs[0])); \
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}
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// Create the OpenGL or OpenGL ES context
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//
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int _glfwCreateContext(_GLFWwindow* window,
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const _GLFWctxconfig* ctxconfig,
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const _GLFWfbconfig* fbconfig)
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{
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int attribs[40];
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int pixelFormat = 0;
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PIXELFORMATDESCRIPTOR pfd;
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HGLRC share = NULL;
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if (ctxconfig->share)
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share = ctxconfig->share->wgl.context;
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window->wgl.dc = GetDC(window->win32.handle);
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if (!window->wgl.dc)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"WGL: Failed to retrieve DC for window");
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return GL_FALSE;
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}
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if (!choosePixelFormat(window, fbconfig, &pixelFormat))
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return GL_FALSE;
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if (!DescribePixelFormat(window->wgl.dc, pixelFormat, sizeof(pfd), &pfd))
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"WGL: Failed to retrieve PFD for selected pixel format");
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return GL_FALSE;
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}
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if (!SetPixelFormat(window->wgl.dc, pixelFormat, &pfd))
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"WGL: Failed to set selected pixel format");
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return GL_FALSE;
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}
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if (window->wgl.ARB_create_context)
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{
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int index = 0, mask = 0, flags = 0;
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if (ctxconfig->api == GLFW_OPENGL_API)
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{
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if (ctxconfig->forward)
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flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
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if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE)
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mask |= WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
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else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE)
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mask |= WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
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}
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else
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mask |= WGL_CONTEXT_ES2_PROFILE_BIT_EXT;
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if (ctxconfig->debug)
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flags |= WGL_CONTEXT_DEBUG_BIT_ARB;
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if (ctxconfig->robustness)
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{
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if (window->wgl.ARB_create_context_robustness)
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{
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if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
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{
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setWGLattrib(WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
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WGL_NO_RESET_NOTIFICATION_ARB);
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}
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else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET)
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{
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setWGLattrib(WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
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WGL_LOSE_CONTEXT_ON_RESET_ARB);
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}
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flags |= WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB;
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}
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}
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if (ctxconfig->release)
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{
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if (window->wgl.ARB_context_flush_control)
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{
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if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE)
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{
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setWGLattrib(WGL_CONTEXT_RELEASE_BEHAVIOR_ARB,
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WGL_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB);
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}
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else if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_FLUSH)
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{
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setWGLattrib(WGL_CONTEXT_RELEASE_BEHAVIOR_ARB,
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WGL_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB);
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}
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}
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}
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// NOTE: Only request an explicitly versioned context when necessary, as
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// explicitly requesting version 1.0 does not always return the
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// highest version supported by the driver
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if (ctxconfig->major != 1 || ctxconfig->minor != 0)
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{
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setWGLattrib(WGL_CONTEXT_MAJOR_VERSION_ARB, ctxconfig->major);
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setWGLattrib(WGL_CONTEXT_MINOR_VERSION_ARB, ctxconfig->minor);
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}
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if (flags)
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setWGLattrib(WGL_CONTEXT_FLAGS_ARB, flags);
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if (mask)
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setWGLattrib(WGL_CONTEXT_PROFILE_MASK_ARB, mask);
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setWGLattrib(0, 0);
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window->wgl.context = window->wgl.CreateContextAttribsARB(window->wgl.dc,
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share,
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attribs);
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if (!window->wgl.context)
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{
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_glfwInputError(GLFW_VERSION_UNAVAILABLE,
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"WGL: Failed to create OpenGL context");
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return GL_FALSE;
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}
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}
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else
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{
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window->wgl.context = wglCreateContext(window->wgl.dc);
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if (!window->wgl.context)
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{
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_glfwInputError(GLFW_VERSION_UNAVAILABLE,
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"WGL: Failed to create OpenGL context");
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return GL_FALSE;
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}
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if (share)
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{
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if (!wglShareLists(share, window->wgl.context))
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"WGL: Failed to enable sharing with specified OpenGL context");
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return GL_FALSE;
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}
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}
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}
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_glfwPlatformMakeContextCurrent(window);
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initWGLExtensions(window);
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return GL_TRUE;
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}
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#undef setWGLattrib
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// Destroy the OpenGL context
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//
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void _glfwDestroyContext(_GLFWwindow* window)
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{
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if (window->wgl.context)
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{
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wglDeleteContext(window->wgl.context);
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window->wgl.context = NULL;
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}
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if (window->wgl.dc)
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{
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ReleaseDC(window->win32.handle, window->wgl.dc);
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window->wgl.dc = NULL;
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}
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}
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// Analyzes the specified context for possible recreation
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//
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int _glfwAnalyzeContext(const _GLFWwindow* window,
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const _GLFWctxconfig* ctxconfig,
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const _GLFWfbconfig* fbconfig)
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{
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GLboolean required = GL_FALSE;
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if (ctxconfig->api == GLFW_OPENGL_API)
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{
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if (ctxconfig->forward)
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{
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if (!window->wgl.ARB_create_context)
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{
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_glfwInputError(GLFW_VERSION_UNAVAILABLE,
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"WGL: A forward compatible OpenGL context requested but WGL_ARB_create_context is unavailable");
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return _GLFW_RECREATION_IMPOSSIBLE;
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}
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required = GL_TRUE;
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}
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if (ctxconfig->profile)
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{
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if (!window->wgl.ARB_create_context_profile)
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{
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_glfwInputError(GLFW_VERSION_UNAVAILABLE,
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"WGL: OpenGL profile requested but WGL_ARB_create_context_profile is unavailable");
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return _GLFW_RECREATION_IMPOSSIBLE;
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}
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required = GL_TRUE;
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}
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if (ctxconfig->release)
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{
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if (window->wgl.ARB_context_flush_control)
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required = GL_TRUE;
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}
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}
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else
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{
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if (!window->wgl.ARB_create_context ||
|
|
!window->wgl.ARB_create_context_profile ||
|
|
!window->wgl.EXT_create_context_es2_profile)
|
|
{
|
|
_glfwInputError(GLFW_API_UNAVAILABLE,
|
|
"WGL: OpenGL ES requested but WGL_ARB_create_context_es2_profile is unavailable");
|
|
return _GLFW_RECREATION_IMPOSSIBLE;
|
|
}
|
|
|
|
required = GL_TRUE;
|
|
}
|
|
|
|
if (ctxconfig->major != 1 || ctxconfig->minor != 0)
|
|
{
|
|
if (window->wgl.ARB_create_context)
|
|
required = GL_TRUE;
|
|
}
|
|
|
|
if (ctxconfig->debug)
|
|
{
|
|
if (window->wgl.ARB_create_context)
|
|
required = GL_TRUE;
|
|
}
|
|
|
|
if (fbconfig->samples > 0)
|
|
{
|
|
// MSAA is not a hard constraint, so do nothing if it's not supported
|
|
if (window->wgl.ARB_multisample && window->wgl.ARB_pixel_format)
|
|
required = GL_TRUE;
|
|
}
|
|
|
|
if (fbconfig->sRGB)
|
|
{
|
|
// sRGB is not a hard constraint, so do nothing if it's not supported
|
|
if (window->wgl.ARB_framebuffer_sRGB && window->wgl.ARB_pixel_format)
|
|
required = GL_TRUE;
|
|
}
|
|
|
|
if (required)
|
|
return _GLFW_RECREATION_REQUIRED;
|
|
|
|
return _GLFW_RECREATION_NOT_NEEDED;
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
////// GLFW platform API //////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
void _glfwPlatformMakeContextCurrent(_GLFWwindow* window)
|
|
{
|
|
if (window)
|
|
wglMakeCurrent(window->wgl.dc, window->wgl.context);
|
|
else
|
|
wglMakeCurrent(NULL, NULL);
|
|
|
|
_glfwSetContextTLS(window);
|
|
}
|
|
|
|
void _glfwPlatformSwapBuffers(_GLFWwindow* window)
|
|
{
|
|
// HACK: Use DwmFlush when desktop composition is enabled
|
|
if (_glfwIsCompositionEnabled() && !window->monitor)
|
|
{
|
|
int count = window->wgl.interval;
|
|
while (count--)
|
|
_glfw_DwmFlush();
|
|
}
|
|
|
|
SwapBuffers(window->wgl.dc);
|
|
}
|
|
|
|
void _glfwPlatformSwapInterval(int interval)
|
|
{
|
|
_GLFWwindow* window = _glfwPlatformGetCurrentContext();
|
|
|
|
window->wgl.interval = interval;
|
|
|
|
// HACK: Disable WGL swap interval when desktop composition is enabled to
|
|
// avoid interfering with DWM vsync
|
|
if (_glfwIsCompositionEnabled() && !window->monitor)
|
|
interval = 0;
|
|
|
|
if (window->wgl.EXT_swap_control)
|
|
window->wgl.SwapIntervalEXT(interval);
|
|
}
|
|
|
|
int _glfwPlatformExtensionSupported(const char* extension)
|
|
{
|
|
const GLubyte* extensions;
|
|
|
|
_GLFWwindow* window = _glfwPlatformGetCurrentContext();
|
|
|
|
if (window->wgl.GetExtensionsStringEXT != NULL)
|
|
{
|
|
extensions = (GLubyte*) window->wgl.GetExtensionsStringEXT();
|
|
if (extensions != NULL)
|
|
{
|
|
if (_glfwStringInExtensionString(extension, extensions))
|
|
return GL_TRUE;
|
|
}
|
|
}
|
|
|
|
if (window->wgl.GetExtensionsStringARB != NULL)
|
|
{
|
|
extensions = (GLubyte*) window->wgl.GetExtensionsStringARB(window->wgl.dc);
|
|
if (extensions != NULL)
|
|
{
|
|
if (_glfwStringInExtensionString(extension, extensions))
|
|
return GL_TRUE;
|
|
}
|
|
}
|
|
|
|
return GL_FALSE;
|
|
}
|
|
|
|
GLFWglproc _glfwPlatformGetProcAddress(const char* procname)
|
|
{
|
|
const GLFWglproc proc = (GLFWglproc) wglGetProcAddress(procname);
|
|
if (proc)
|
|
return proc;
|
|
|
|
return (GLFWglproc) GetProcAddress(_glfw.wgl.opengl32.instance, procname);
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
////// GLFW native API //////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
GLFWAPI HGLRC glfwGetWGLContext(GLFWwindow* handle)
|
|
{
|
|
_GLFWwindow* window = (_GLFWwindow*) handle;
|
|
_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
|
|
return window->wgl.context;
|
|
}
|
|
|