672 lines
20 KiB
C
672 lines
20 KiB
C
//========================================================================
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// GLFW 3.2 EGL - 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 <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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// Return a description of the specified EGL error
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//
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static const char* getErrorString(EGLint error)
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{
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switch (error)
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{
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case EGL_SUCCESS:
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return "Success";
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case EGL_NOT_INITIALIZED:
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return "EGL is not or could not be initialized";
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case EGL_BAD_ACCESS:
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return "EGL cannot access a requested resource";
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case EGL_BAD_ALLOC:
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return "EGL failed to allocate resources for the requested operation";
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case EGL_BAD_ATTRIBUTE:
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return "An unrecognized attribute or attribute value was passed in the attribute list";
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case EGL_BAD_CONTEXT:
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return "An EGLContext argument does not name a valid EGL rendering context";
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case EGL_BAD_CONFIG:
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return "An EGLConfig argument does not name a valid EGL frame buffer configuration";
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case EGL_BAD_CURRENT_SURFACE:
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return "The current surface of the calling thread is a window, pixel buffer or pixmap that is no longer valid";
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case EGL_BAD_DISPLAY:
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return "An EGLDisplay argument does not name a valid EGL display connection";
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case EGL_BAD_SURFACE:
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return "An EGLSurface argument does not name a valid surface configured for GL rendering";
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case EGL_BAD_MATCH:
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return "Arguments are inconsistent";
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case EGL_BAD_PARAMETER:
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return "One or more argument values are invalid";
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case EGL_BAD_NATIVE_PIXMAP:
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return "A NativePixmapType argument does not refer to a valid native pixmap";
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case EGL_BAD_NATIVE_WINDOW:
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return "A NativeWindowType argument does not refer to a valid native window";
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case EGL_CONTEXT_LOST:
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return "The application must destroy all contexts and reinitialise";
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}
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return "UNKNOWN EGL ERROR";
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}
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// Returns the specified attribute of the specified EGLConfig
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//
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static int getConfigAttrib(EGLConfig config, int attrib)
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{
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int value;
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_glfw_eglGetConfigAttrib(_glfw.egl.display, config, attrib, &value);
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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 GLFWbool chooseFBConfigs(const _GLFWctxconfig* ctxconfig,
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const _GLFWfbconfig* desired,
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EGLConfig* result)
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{
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EGLConfig* nativeConfigs;
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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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_glfw_eglGetConfigs(_glfw.egl.display, NULL, 0, &nativeCount);
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if (!nativeCount)
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{
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_glfwInputError(GLFW_API_UNAVAILABLE, "EGL: No EGLConfigs returned");
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return GLFW_FALSE;
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}
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nativeConfigs = calloc(nativeCount, sizeof(EGLConfig));
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_glfw_eglGetConfigs(_glfw.egl.display, nativeConfigs,
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nativeCount, &nativeCount);
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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 EGLConfig n = nativeConfigs[i];
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_GLFWfbconfig* u = usableConfigs + usableCount;
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// Only consider RGB(A) EGLConfigs
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if (!(getConfigAttrib(n, EGL_COLOR_BUFFER_TYPE) & EGL_RGB_BUFFER))
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continue;
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// Only consider window EGLConfigs
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if (!(getConfigAttrib(n, EGL_SURFACE_TYPE) & EGL_WINDOW_BIT))
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continue;
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#if defined(_GLFW_X11)
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// Only consider EGLConfigs with associated Visuals
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if (!getConfigAttrib(n, EGL_NATIVE_VISUAL_ID))
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continue;
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#endif // _GLFW_X11
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if (ctxconfig->api == GLFW_OPENGL_ES_API)
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{
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if (ctxconfig->major == 1)
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{
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if (!(getConfigAttrib(n, EGL_RENDERABLE_TYPE) & EGL_OPENGL_ES_BIT))
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continue;
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}
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else
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{
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if (!(getConfigAttrib(n, EGL_RENDERABLE_TYPE) & EGL_OPENGL_ES2_BIT))
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continue;
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}
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}
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else if (ctxconfig->api == GLFW_OPENGL_API)
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{
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if (!(getConfigAttrib(n, EGL_RENDERABLE_TYPE) & EGL_OPENGL_BIT))
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continue;
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}
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u->redBits = getConfigAttrib(n, EGL_RED_SIZE);
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u->greenBits = getConfigAttrib(n, EGL_GREEN_SIZE);
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u->blueBits = getConfigAttrib(n, EGL_BLUE_SIZE);
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u->alphaBits = getConfigAttrib(n, EGL_ALPHA_SIZE);
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u->depthBits = getConfigAttrib(n, EGL_DEPTH_SIZE);
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u->stencilBits = getConfigAttrib(n, EGL_STENCIL_SIZE);
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u->samples = getConfigAttrib(n, EGL_SAMPLES);
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u->doublebuffer = GLFW_TRUE;
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u->egl = n;
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usableCount++;
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}
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closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
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if (closest)
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*result = closest->egl;
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free(nativeConfigs);
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free(usableConfigs);
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return closest ? GLFW_TRUE : GLFW_FALSE;
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW internal API //////
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//////////////////////////////////////////////////////////////////////////
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// Initialize EGL
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//
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int _glfwInitContextAPI(void)
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{
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int i;
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const char* sonames[] =
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{
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#if defined(_GLFW_WIN32)
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"libEGL.dll",
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"EGL.dll",
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#elif defined(_GLFW_COCOA)
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"libEGL.dylib",
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#else
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"libEGL.so.1",
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#endif
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NULL
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};
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if (!_glfwCreateContextTLS())
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return GLFW_FALSE;
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for (i = 0; sonames[i]; i++)
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{
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_glfw.egl.handle = _glfw_dlopen(sonames[i]);
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if (_glfw.egl.handle)
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break;
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}
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if (!_glfw.egl.handle)
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{
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_glfwInputError(GLFW_API_UNAVAILABLE, "EGL: Failed to load EGL");
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return GLFW_FALSE;
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}
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_glfw.egl.GetConfigAttrib =
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_glfw_dlsym(_glfw.egl.handle, "eglGetConfigAttrib");
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_glfw.egl.GetConfigs =
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_glfw_dlsym(_glfw.egl.handle, "eglGetConfigs");
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_glfw.egl.GetDisplay =
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_glfw_dlsym(_glfw.egl.handle, "eglGetDisplay");
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_glfw.egl.GetError =
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_glfw_dlsym(_glfw.egl.handle, "eglGetError");
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_glfw.egl.Initialize =
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_glfw_dlsym(_glfw.egl.handle, "eglInitialize");
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_glfw.egl.Terminate =
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_glfw_dlsym(_glfw.egl.handle, "eglTerminate");
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_glfw.egl.BindAPI =
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_glfw_dlsym(_glfw.egl.handle, "eglBindAPI");
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_glfw.egl.CreateContext =
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_glfw_dlsym(_glfw.egl.handle, "eglCreateContext");
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_glfw.egl.DestroySurface =
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_glfw_dlsym(_glfw.egl.handle, "eglDestroySurface");
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_glfw.egl.DestroyContext =
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_glfw_dlsym(_glfw.egl.handle, "eglDestroyContext");
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_glfw.egl.CreateWindowSurface =
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_glfw_dlsym(_glfw.egl.handle, "eglCreateWindowSurface");
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_glfw.egl.MakeCurrent =
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_glfw_dlsym(_glfw.egl.handle, "eglMakeCurrent");
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_glfw.egl.SwapBuffers =
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_glfw_dlsym(_glfw.egl.handle, "eglSwapBuffers");
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_glfw.egl.SwapInterval =
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_glfw_dlsym(_glfw.egl.handle, "eglSwapInterval");
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_glfw.egl.QueryString =
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_glfw_dlsym(_glfw.egl.handle, "eglQueryString");
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_glfw.egl.GetProcAddress =
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_glfw_dlsym(_glfw.egl.handle, "eglGetProcAddress");
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_glfw.egl.display =
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_glfw_eglGetDisplay((EGLNativeDisplayType)_GLFW_EGL_NATIVE_DISPLAY);
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if (_glfw.egl.display == EGL_NO_DISPLAY)
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{
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_glfwInputError(GLFW_API_UNAVAILABLE,
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"EGL: Failed to get EGL display: %s",
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getErrorString(_glfw_eglGetError()));
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return GLFW_FALSE;
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}
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if (!_glfw_eglInitialize(_glfw.egl.display,
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&_glfw.egl.major,
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&_glfw.egl.minor))
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{
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_glfwInputError(GLFW_API_UNAVAILABLE,
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"EGL: Failed to initialize EGL: %s",
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getErrorString(_glfw_eglGetError()));
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return GLFW_FALSE;
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}
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_glfw.egl.KHR_create_context =
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_glfwPlatformExtensionSupported("EGL_KHR_create_context");
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_glfw.egl.KHR_create_context_no_error =
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_glfwPlatformExtensionSupported("EGL_KHR_create_context_no_error");
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return GLFW_TRUE;
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}
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// Terminate EGL
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//
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void _glfwTerminateContextAPI(void)
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{
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if (_glfw_eglTerminate)
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_glfw_eglTerminate(_glfw.egl.display);
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if (_glfw.egl.handle)
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{
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_glfw_dlclose(_glfw.egl.handle);
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_glfw.egl.handle = NULL;
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}
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_glfwDestroyContextTLS();
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}
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#define setEGLattrib(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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EGLConfig config;
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EGLContext share = NULL;
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if (ctxconfig->share)
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share = ctxconfig->share->egl.context;
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if (!chooseFBConfigs(ctxconfig, fbconfig, &config))
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{
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_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
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"EGL: Failed to find a suitable EGLConfig");
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return GLFW_FALSE;
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}
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if (ctxconfig->api == GLFW_OPENGL_ES_API)
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{
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if (!_glfw_eglBindAPI(EGL_OPENGL_ES_API))
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{
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_glfwInputError(GLFW_API_UNAVAILABLE,
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"EGL: Failed to bind OpenGL ES: %s",
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getErrorString(_glfw_eglGetError()));
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return GLFW_FALSE;
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}
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}
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else
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{
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if (!_glfw_eglBindAPI(EGL_OPENGL_API))
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{
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_glfwInputError(GLFW_API_UNAVAILABLE,
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"EGL: Failed to bind OpenGL: %s",
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getErrorString(_glfw_eglGetError()));
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return GLFW_FALSE;
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}
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}
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if (_glfw.egl.KHR_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 |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
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if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE)
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mask |= EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
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else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE)
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mask |= EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR;
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if (_glfw.egl.KHR_create_context_no_error)
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{
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if (ctxconfig->noerror)
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flags |= EGL_CONTEXT_OPENGL_NO_ERROR_KHR;
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}
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}
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if (ctxconfig->debug)
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flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
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if (ctxconfig->robustness)
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{
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if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
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{
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setEGLattrib(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR,
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EGL_NO_RESET_NOTIFICATION_KHR);
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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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setEGLattrib(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR,
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EGL_LOSE_CONTEXT_ON_RESET_KHR);
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}
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flags |= EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR;
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}
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if (ctxconfig->major != 1 || ctxconfig->minor != 0)
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{
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setEGLattrib(EGL_CONTEXT_MAJOR_VERSION_KHR, ctxconfig->major);
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setEGLattrib(EGL_CONTEXT_MINOR_VERSION_KHR, ctxconfig->minor);
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}
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if (mask)
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setEGLattrib(EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR, mask);
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if (flags)
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setEGLattrib(EGL_CONTEXT_FLAGS_KHR, flags);
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setEGLattrib(EGL_NONE, EGL_NONE);
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}
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else
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{
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int index = 0;
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if (ctxconfig->api == GLFW_OPENGL_ES_API)
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setEGLattrib(EGL_CONTEXT_CLIENT_VERSION, ctxconfig->major);
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setEGLattrib(EGL_NONE, EGL_NONE);
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}
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// Context release behaviors (GL_KHR_context_flush_control) are not yet
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// supported on EGL but are not a hard constraint, so ignore and continue
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window->egl.context = _glfw_eglCreateContext(_glfw.egl.display,
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config, share, attribs);
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if (window->egl.context == EGL_NO_CONTEXT)
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{
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_glfwInputError(GLFW_VERSION_UNAVAILABLE,
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"EGL: Failed to create context: %s",
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getErrorString(_glfw_eglGetError()));
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return GLFW_FALSE;
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}
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window->egl.surface =
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_glfw_eglCreateWindowSurface(_glfw.egl.display,
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config,
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(EGLNativeWindowType)_GLFW_EGL_NATIVE_WINDOW,
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NULL);
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if (window->egl.surface == EGL_NO_SURFACE)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"EGL: Failed to create window surface: %s",
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getErrorString(_glfw_eglGetError()));
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return GLFW_FALSE;
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}
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window->egl.config = config;
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// Load the appropriate client library
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{
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int i;
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const char** sonames;
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const char* es1sonames[] =
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{
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#if defined(_GLFW_WIN32)
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"GLESv1_CM.dll",
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"libGLES_CM.dll",
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#elif defined(_GLFW_COCOA)
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"libGLESv1_CM.dylib",
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#else
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"libGLESv1_CM.so.1",
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"libGLES_CM.so.1",
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#endif
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NULL
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};
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const char* es2sonames[] =
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{
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#if defined(_GLFW_WIN32)
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"GLESv2.dll",
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"libGLESv2.dll",
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#elif defined(_GLFW_COCOA)
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"libGLESv2.dylib",
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#else
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"libGLESv2.so.2",
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#endif
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NULL
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};
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const char* glsonames[] =
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{
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#if defined(_GLFW_WIN32)
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#elif defined(_GLFW_COCOA)
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#else
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"libGL.so.1",
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#endif
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NULL
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};
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if (ctxconfig->api == GLFW_OPENGL_ES_API)
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{
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if (ctxconfig->major == 1)
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sonames = es1sonames;
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else
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sonames = es2sonames;
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}
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else
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sonames = glsonames;
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for (i = 0; sonames[i]; i++)
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{
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window->egl.client = _glfw_dlopen(sonames[i]);
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if (window->egl.client)
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break;
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}
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if (!window->egl.client)
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{
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_glfwInputError(GLFW_API_UNAVAILABLE,
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"EGL: Failed to load client library");
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return GLFW_FALSE;
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}
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}
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return GLFW_TRUE;
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}
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#undef setEGLattrib
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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 defined(_GLFW_X11)
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// NOTE: Do not unload libGL.so.1 while the X11 display is still open,
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// as it will make XCloseDisplay segfault
|
|
if (window->context.api != GLFW_OPENGL_API)
|
|
#endif // _GLFW_X11
|
|
{
|
|
if (window->egl.client)
|
|
{
|
|
_glfw_dlclose(window->egl.client);
|
|
window->egl.client = NULL;
|
|
}
|
|
}
|
|
|
|
if (window->egl.surface)
|
|
{
|
|
_glfw_eglDestroySurface(_glfw.egl.display, window->egl.surface);
|
|
window->egl.surface = EGL_NO_SURFACE;
|
|
}
|
|
|
|
if (window->egl.context)
|
|
{
|
|
_glfw_eglDestroyContext(_glfw.egl.display, window->egl.context);
|
|
window->egl.context = EGL_NO_CONTEXT;
|
|
}
|
|
}
|
|
|
|
// Returns the Visual and depth of the chosen EGLConfig
|
|
//
|
|
#if defined(_GLFW_X11)
|
|
GLFWbool _glfwChooseVisual(const _GLFWctxconfig* ctxconfig,
|
|
const _GLFWfbconfig* fbconfig,
|
|
Visual** visual, int* depth)
|
|
{
|
|
XVisualInfo* result;
|
|
XVisualInfo desired;
|
|
EGLConfig native;
|
|
EGLint visualID = 0, count = 0;
|
|
const long vimask = VisualScreenMask | VisualIDMask;
|
|
|
|
if (!chooseFBConfigs(ctxconfig, fbconfig, &native))
|
|
{
|
|
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
|
|
"EGL: Failed to find a suitable EGLConfig");
|
|
return GLFW_FALSE;
|
|
}
|
|
|
|
_glfw_eglGetConfigAttrib(_glfw.egl.display, native,
|
|
EGL_NATIVE_VISUAL_ID, &visualID);
|
|
|
|
desired.screen = _glfw.x11.screen;
|
|
desired.visualid = visualID;
|
|
|
|
result = XGetVisualInfo(_glfw.x11.display, vimask, &desired, &count);
|
|
if (!result)
|
|
{
|
|
_glfwInputError(GLFW_PLATFORM_ERROR,
|
|
"EGL: Failed to retrieve Visual for EGLConfig");
|
|
return GLFW_FALSE;
|
|
}
|
|
|
|
*visual = result->visual;
|
|
*depth = result->depth;
|
|
|
|
XFree(result);
|
|
return GLFW_TRUE;
|
|
}
|
|
#endif // _GLFW_X11
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
////// GLFW platform API //////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
void _glfwPlatformMakeContextCurrent(_GLFWwindow* window)
|
|
{
|
|
if (window)
|
|
{
|
|
_glfw_eglMakeCurrent(_glfw.egl.display,
|
|
window->egl.surface,
|
|
window->egl.surface,
|
|
window->egl.context);
|
|
}
|
|
else
|
|
{
|
|
_glfw_eglMakeCurrent(_glfw.egl.display,
|
|
EGL_NO_SURFACE,
|
|
EGL_NO_SURFACE,
|
|
EGL_NO_CONTEXT);
|
|
}
|
|
|
|
_glfwSetContextTLS(window);
|
|
}
|
|
|
|
void _glfwPlatformSwapBuffers(_GLFWwindow* window)
|
|
{
|
|
_glfw_eglSwapBuffers(_glfw.egl.display, window->egl.surface);
|
|
}
|
|
|
|
void _glfwPlatformSwapInterval(int interval)
|
|
{
|
|
_glfw_eglSwapInterval(_glfw.egl.display, interval);
|
|
}
|
|
|
|
int _glfwPlatformExtensionSupported(const char* extension)
|
|
{
|
|
const char* extensions = _glfw_eglQueryString(_glfw.egl.display,
|
|
EGL_EXTENSIONS);
|
|
if (extensions)
|
|
{
|
|
if (_glfwStringInExtensionString(extension, extensions))
|
|
return GLFW_TRUE;
|
|
}
|
|
|
|
return GLFW_FALSE;
|
|
}
|
|
|
|
GLFWglproc _glfwPlatformGetProcAddress(const char* procname)
|
|
{
|
|
_GLFWwindow* window = _glfwPlatformGetCurrentContext();
|
|
|
|
if (window->egl.client)
|
|
{
|
|
GLFWglproc proc = (GLFWglproc) _glfw_dlsym(window->egl.client, procname);
|
|
if (proc)
|
|
return proc;
|
|
}
|
|
|
|
return _glfw_eglGetProcAddress(procname);
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
////// GLFW native API //////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
GLFWAPI EGLDisplay glfwGetEGLDisplay(void)
|
|
{
|
|
_GLFW_REQUIRE_INIT_OR_RETURN(EGL_NO_DISPLAY);
|
|
return _glfw.egl.display;
|
|
}
|
|
|
|
GLFWAPI EGLContext glfwGetEGLContext(GLFWwindow* handle)
|
|
{
|
|
_GLFWwindow* window = (_GLFWwindow*) handle;
|
|
_GLFW_REQUIRE_INIT_OR_RETURN(EGL_NO_CONTEXT);
|
|
|
|
if (window->context.api == GLFW_NO_API)
|
|
{
|
|
_glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
|
|
return EGL_NO_CONTEXT;
|
|
}
|
|
|
|
return window->egl.context;
|
|
}
|
|
|
|
GLFWAPI EGLSurface glfwGetEGLSurface(GLFWwindow* handle)
|
|
{
|
|
_GLFWwindow* window = (_GLFWwindow*) handle;
|
|
_GLFW_REQUIRE_INIT_OR_RETURN(EGL_NO_SURFACE);
|
|
|
|
if (window->context.api == GLFW_NO_API)
|
|
{
|
|
_glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
|
|
return EGL_NO_SURFACE;
|
|
}
|
|
|
|
return window->egl.surface;
|
|
}
|
|
|