parent
812ebe200d
commit
c878281487
1 changed files with 462 additions and 0 deletions
@ -0,0 +1,462 @@ |
||||
//========================================================================
|
||||
// GLFW - An OpenGL library
|
||||
// Platform: X11/EGL/GLES
|
||||
// API version: 3.0
|
||||
// WWW: http://www.glfw.org/
|
||||
//------------------------------------------------------------------------
|
||||
// Copyright (c) 2002-2006 Marcus Geelnard
|
||||
// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
|
||||
//
|
||||
// This software is provided 'as-is', without any express or implied
|
||||
// warranty. In no event will the authors be held liable for any damages
|
||||
// arising from the use of this software.
|
||||
//
|
||||
// Permission is granted to anyone to use this software for any purpose,
|
||||
// including commercial applications, and to alter it and redistribute it
|
||||
// freely, subject to the following restrictions:
|
||||
//
|
||||
// 1. The origin of this software must not be misrepresented; you must not
|
||||
// claim that you wrote the original software. If you use this software
|
||||
// in a product, an acknowledgment in the product documentation would
|
||||
// be appreciated but is not required.
|
||||
//
|
||||
// 2. Altered source versions must be plainly marked as such, and must not
|
||||
// be misrepresented as being the original software.
|
||||
//
|
||||
// 3. This notice may not be removed or altered from any source
|
||||
// distribution.
|
||||
//
|
||||
//========================================================================
|
||||
|
||||
#include "internal.h" |
||||
|
||||
#include <stdio.h> |
||||
#include <stdlib.h> |
||||
|
||||
// Max number of EGL configuration we handle
|
||||
#define _GLFW_EGL_CONFIG_IN 15 |
||||
|
||||
//========================================================================
|
||||
// Returns the specified attribute of the specified EGLConfig
|
||||
//========================================================================
|
||||
|
||||
static int getFBConfigAttrib(_GLFWwindow* window, EGLConfig fbconfig, int attrib) |
||||
{ |
||||
int value; |
||||
eglGetConfigAttrib(_glfwLibrary.EGL.display, fbconfig, attrib, &value); |
||||
return value; |
||||
} |
||||
|
||||
|
||||
//========================================================================
|
||||
// Return a list of available and usable framebuffer configs
|
||||
//========================================================================
|
||||
|
||||
static _GLFWfbconfig* getFBConfigs(_GLFWwindow* window, unsigned int* found) |
||||
{ |
||||
EGLConfig fbconfigs[_GLFW_EGL_CONFIG_IN]; |
||||
_GLFWfbconfig* result; |
||||
int i, count = 0; |
||||
|
||||
*found = 0; |
||||
|
||||
|
||||
eglGetConfigs(_glfwLibrary.EGL.display, fbconfigs, |
||||
_GLFW_EGL_CONFIG_IN, &count); |
||||
if (!count) |
||||
{ |
||||
_glfwSetError(GLFW_OPENGL_UNAVAILABLE, |
||||
"X11/EGL: No EGLConfigs returned"); |
||||
return NULL; |
||||
} |
||||
|
||||
result = (_GLFWfbconfig*) malloc(sizeof(_GLFWfbconfig) * count); |
||||
if (!result) |
||||
{ |
||||
_glfwSetError(GLFW_OUT_OF_MEMORY, |
||||
"X11/EGL: Failed to allocate _GLFWfbconfig array"); |
||||
return NULL; |
||||
} |
||||
|
||||
for (i = 0; i < count; i++) |
||||
{ |
||||
if (!getFBConfigAttrib(window, fbconfigs[i], EGL_NATIVE_VISUAL_ID)) |
||||
{ |
||||
// Only consider EGLConfigs with associated visuals
|
||||
continue; |
||||
} |
||||
|
||||
if (!(getFBConfigAttrib(window, |
||||
fbconfigs[i], |
||||
EGL_COLOR_BUFFER_TYPE) & EGL_RGB_BUFFER)) |
||||
{ |
||||
// Only consider RGB(A) EGLConfigs
|
||||
continue; |
||||
} |
||||
|
||||
if (!(getFBConfigAttrib(window, fbconfigs[i], EGL_RENDERABLE_TYPE) & EGL_WINDOW_BIT)) |
||||
{ |
||||
// Only consider window EGLConfigs
|
||||
continue; |
||||
} |
||||
|
||||
result[*found].redBits = getFBConfigAttrib(window, fbconfigs[i], EGL_RED_SIZE); |
||||
result[*found].greenBits = getFBConfigAttrib(window, fbconfigs[i], EGL_GREEN_SIZE); |
||||
result[*found].blueBits = getFBConfigAttrib(window, fbconfigs[i], EGL_BLUE_SIZE); |
||||
|
||||
result[*found].alphaBits = getFBConfigAttrib(window, fbconfigs[i], EGL_ALPHA_SIZE); |
||||
result[*found].depthBits = getFBConfigAttrib(window, fbconfigs[i], EGL_DEPTH_SIZE); |
||||
result[*found].stencilBits = getFBConfigAttrib(window, fbconfigs[i], EGL_STENCIL_SIZE); |
||||
|
||||
result[*found].samples = getFBConfigAttrib(window, fbconfigs[i], EGL_SAMPLES); |
||||
|
||||
result[*found].platformID = (GLFWintptr) getFBConfigAttrib(window, fbconfigs[i], EGL_CONFIG_ID); |
||||
|
||||
(*found)++; |
||||
} |
||||
|
||||
return result; |
||||
} |
||||
|
||||
//========================================================================
|
||||
// Read back framebuffer parameters from the context
|
||||
//========================================================================
|
||||
|
||||
static void refreshContextParams(_GLFWwindow* window, EGLint fbconfigID) |
||||
{ |
||||
EGLint dummy; |
||||
EGLConfig fbconfig[_GLFW_EGL_CONFIG_IN]; |
||||
|
||||
int attribs[] = { EGL_CONFIG_ID, fbconfigID, None }; |
||||
|
||||
eglChooseConfig(_glfwLibrary.EGL.display, |
||||
attribs, |
||||
fbconfig, |
||||
_GLFW_EGL_CONFIG_IN, |
||||
&dummy); |
||||
if (!dummy) |
||||
{ |
||||
// This should never ever happen
|
||||
// TODO: Flag this as an error and propagate up
|
||||
_glfwSetError(GLFW_PLATFORM_ERROR, "X11/EGL: Cannot find known " |
||||
"EGLConfig by ID. This cannot " |
||||
"happen. Have a nice day.\n"); |
||||
abort(); |
||||
} |
||||
|
||||
// There is no clear definition of an "accelerated" context on X11/EGL, and
|
||||
// true sounds better than false, so we hardcode true here
|
||||
window->accelerated = GL_TRUE; |
||||
|
||||
window->redBits = getFBConfigAttrib(window, *fbconfig, EGL_RED_SIZE); |
||||
window->greenBits = getFBConfigAttrib(window, *fbconfig, EGL_GREEN_SIZE); |
||||
window->blueBits = getFBConfigAttrib(window, *fbconfig, EGL_BLUE_SIZE); |
||||
|
||||
window->alphaBits = getFBConfigAttrib(window, *fbconfig, EGL_ALPHA_SIZE); |
||||
window->depthBits = getFBConfigAttrib(window, *fbconfig, EGL_DEPTH_SIZE); |
||||
window->stencilBits = getFBConfigAttrib(window, *fbconfig, EGL_STENCIL_SIZE); |
||||
|
||||
// Get FSAA buffer sample count
|
||||
window->samples = getFBConfigAttrib(window, *fbconfig, EGL_SAMPLES); |
||||
} |
||||
|
||||
|
||||
//========================================================================
|
||||
// Create the actual OpenGL(|ES) context
|
||||
//========================================================================
|
||||
|
||||
#define setEGLattrib(attribs, index, attribName, attribValue) \ |
||||
attribs[index++] = attribName; \
|
||||
attribs[index++] = attribValue; |
||||
|
||||
static int createContext(_GLFWwindow* window, |
||||
const _GLFWwndconfig* wndconfig, |
||||
EGLint fbconfigID) |
||||
{ |
||||
int attribs[40]; |
||||
EGLint dummy, index, vid; |
||||
EGLConfig fbconfig[_GLFW_EGL_CONFIG_IN]; |
||||
EGLContext share = NULL; |
||||
XVisualInfo visTemplate; |
||||
|
||||
if (wndconfig->share) |
||||
share = wndconfig->share->EGL.context; |
||||
|
||||
// Retrieve the previously selected EGLConfig
|
||||
{ |
||||
index = 0; |
||||
|
||||
setEGLattrib(attribs, index, EGL_CONFIG_ID, fbconfigID); |
||||
setEGLattrib(attribs, index, None, None); |
||||
|
||||
eglChooseConfig(_glfwLibrary.EGL.display, |
||||
attribs, |
||||
fbconfig, |
||||
_GLFW_EGL_CONFIG_IN, |
||||
&dummy); |
||||
|
||||
if (!dummy) |
||||
{ |
||||
_glfwSetError(GLFW_PLATFORM_ERROR, |
||||
"X11/EGL: Failed to retrieve the selected EGLConfig"); |
||||
return GL_FALSE; |
||||
} |
||||
} |
||||
|
||||
// Retrieve the corresponding visual
|
||||
if (!eglGetConfigAttrib(_glfwLibrary.EGL.display, *fbconfig, EGL_NATIVE_VISUAL_ID, &vid)) { |
||||
_glfwSetError(GLFW_PLATFORM_ERROR, |
||||
"X11/EGL: Failed to retrieve visual for EGLConfig"); |
||||
return GL_FALSE; |
||||
} |
||||
|
||||
// The X window visual must match the EGL config
|
||||
visTemplate.visualid = vid; |
||||
window->EGL.visual = XGetVisualInfo(_glfwLibrary.X11.display, VisualIDMask, &visTemplate, &dummy); |
||||
if (window->EGL.visual == NULL) { |
||||
_glfwSetError(GLFW_PLATFORM_ERROR, |
||||
"X11/GLX: Failed to retrieve visual for EGLConfig"); |
||||
return GL_FALSE; |
||||
} |
||||
|
||||
if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE) |
||||
{ |
||||
setEGLattrib(attribs, index, EGL_CONTEXT_CLIENT_VERSION, 2); |
||||
} |
||||
else |
||||
{ |
||||
setEGLattrib(attribs, index, EGL_CONTEXT_CLIENT_VERSION, 1); |
||||
} |
||||
|
||||
setEGLattrib(attribs, index, EGL_NONE, EGL_NONE); |
||||
|
||||
eglBindAPI(EGL_OPENGL_ES_API); |
||||
|
||||
window->EGL.context = eglCreateContext(_glfwLibrary.EGL.display, *fbconfig, share, attribs); |
||||
if (window->EGL.context == EGL_NO_CONTEXT) |
||||
{ |
||||
// TODO: Handle all the various error codes here
|
||||
|
||||
_glfwSetError(GLFW_PLATFORM_ERROR, |
||||
"X11/EGL: Failed to create OpenGL(|ES) context"); |
||||
return GL_FALSE; |
||||
} |
||||
|
||||
refreshContextParams(window, fbconfigID); |
||||
|
||||
return GL_TRUE; |
||||
} |
||||
|
||||
#undef setEGLattrib |
||||
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
////// GLFW internal API //////
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
|
||||
//========================================================================
|
||||
// Initialize EGL
|
||||
//========================================================================
|
||||
|
||||
int _glfwInitOpenGL(void) |
||||
{ |
||||
#ifdef _GLFW_DLOPEN_LIBGL |
||||
int i; |
||||
char* libEGL_names[ ] = |
||||
{ |
||||
"libEGL.so", |
||||
"libEGL.so.1", |
||||
"/usr/lib/libEGL.so", |
||||
"/usr/lib/libEGL.so.1", |
||||
NULL |
||||
}; |
||||
|
||||
for (i = 0; libEGL_names[i] != NULL; i++) |
||||
{ |
||||
_glfwLibrary.EGL.libEGL = dlopen(libEGL_names[i], RTLD_LAZY | RTLD_GLOBAL); |
||||
if (_glfwLibrary.EGL.libEGL) |
||||
break; |
||||
} |
||||
|
||||
if (!_glfwLibrary.EGL.libEGL) |
||||
{ |
||||
_glfwSetError(GLFW_PLATFORM_ERROR, "X11/EGL: Failed to find libEGL"); |
||||
return GL_FALSE; |
||||
} |
||||
#endif |
||||
|
||||
_glfwLibrary.EGL.display = eglGetDisplay((EGLNativeDisplayType)_glfwLibrary.X11.display); |
||||
if (_glfwLibrary.EGL.display == EGL_NO_DISPLAY) |
||||
{ |
||||
_glfwSetError(GLFW_OPENGL_UNAVAILABLE, |
||||
"X11/EGL: Failed to get EGL display"); |
||||
return GL_FALSE; |
||||
} |
||||
|
||||
if (!eglInitialize(_glfwLibrary.EGL.display, |
||||
&_glfwLibrary.EGL.majorVersion, |
||||
&_glfwLibrary.EGL.minorVersion)) |
||||
{ |
||||
_glfwSetError(GLFW_OPENGL_UNAVAILABLE, |
||||
"X11/EGL: Failed to initialize EGL"); |
||||
return GL_FALSE; |
||||
} |
||||
|
||||
return GL_TRUE; |
||||
} |
||||
|
||||
|
||||
//========================================================================
|
||||
// Terminate EGL
|
||||
//========================================================================
|
||||
|
||||
void _glfwTerminateOpenGL(void) |
||||
{ |
||||
// Unload libEGL.so if necessary
|
||||
#ifdef _GLFW_DLOPEN_LIBGL |
||||
if (_glfwLibrary.EGL.libEGL != NULL) |
||||
{ |
||||
dlclose(_glfwLibrary.EGL.libEGL); |
||||
_glfwLibrary.EGL.libEGL = NULL; |
||||
} |
||||
#endif |
||||
eglTerminate(_glfwLibrary.EGL.display); |
||||
} |
||||
|
||||
|
||||
//========================================================================
|
||||
// Prepare for creation of the OpenGL context
|
||||
//========================================================================
|
||||
|
||||
int _glfwCreateContext(_GLFWwindow* window, |
||||
const _GLFWwndconfig* wndconfig, |
||||
const _GLFWfbconfig* fbconfig) |
||||
{ |
||||
_GLFWfbconfig closest; |
||||
|
||||
// Choose the best available fbconfig
|
||||
{ |
||||
unsigned int fbcount; |
||||
_GLFWfbconfig* fbconfigs; |
||||
const _GLFWfbconfig* result; |
||||
|
||||
fbconfigs = getFBConfigs(window, &fbcount); |
||||
if (!fbconfigs) |
||||
{ |
||||
_glfwSetError(GLFW_PLATFORM_ERROR, |
||||
"X11/EGL: No usable EGLFBConfigs found"); |
||||
return GL_FALSE; |
||||
} |
||||
|
||||
result = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount); |
||||
if (!result) |
||||
{ |
||||
_glfwSetError(GLFW_PLATFORM_ERROR, |
||||
"X11/EGL: No EGLFBConfig matched the criteria"); |
||||
|
||||
free(fbconfigs); |
||||
return GL_FALSE; |
||||
} |
||||
|
||||
closest = *result; |
||||
free(fbconfigs); |
||||
} |
||||
|
||||
return createContext(window, wndconfig, closest.platformID); |
||||
} |
||||
|
||||
|
||||
//========================================================================
|
||||
// Destroy the OpenGL context
|
||||
//========================================================================
|
||||
|
||||
void _glfwDestroyContext(_GLFWwindow* window) |
||||
{ |
||||
if (window->EGL.context) |
||||
{ |
||||
// Release and destroy the context
|
||||
eglMakeCurrent(_glfwLibrary.EGL.display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); |
||||
window->EGL.context = NULL; |
||||
} |
||||
} |
||||
|
||||
|
||||
//========================================================================
|
||||
// Make the OpenGL context associated with the specified window current
|
||||
//========================================================================
|
||||
|
||||
void _glfwPlatformMakeContextCurrent(_GLFWwindow* window) |
||||
{ |
||||
if (window) |
||||
{ |
||||
eglMakeCurrent(_glfwLibrary.EGL.display, |
||||
window->EGL.surface, |
||||
window->EGL.surface, |
||||
window->EGL.context); |
||||
} |
||||
else |
||||
eglMakeCurrent(_glfwLibrary.EGL.display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); |
||||
} |
||||
|
||||
|
||||
//========================================================================
|
||||
// Swap OpenGL buffers
|
||||
//========================================================================
|
||||
|
||||
void _glfwPlatformSwapBuffers(void) |
||||
{ |
||||
eglSwapBuffers(_glfwLibrary.EGL.display, |
||||
_glfwLibrary.currentWindow->EGL.surface); |
||||
} |
||||
|
||||
|
||||
//========================================================================
|
||||
// Set double buffering swap interval
|
||||
//========================================================================
|
||||
|
||||
void _glfwPlatformSwapInterval(int interval) |
||||
{ |
||||
eglSwapInterval(_glfwLibrary.EGL.display, interval); |
||||
} |
||||
|
||||
|
||||
//========================================================================
|
||||
// Check if an OpenGL extension is available at runtime
|
||||
//========================================================================
|
||||
|
||||
int _glfwPlatformExtensionSupported(const char* extension) |
||||
{ |
||||
const char* extensions; |
||||
|
||||
// Get list of GLX extensions
|
||||
extensions = eglQueryString(_glfwLibrary.EGL.display, |
||||
EGL_EXTENSIONS); |
||||
if (extensions != NULL) |
||||
{ |
||||
if (_glfwStringInExtensionString(extension, (unsigned char*)extensions)) |
||||
return GL_TRUE; |
||||
} |
||||
|
||||
return GL_FALSE; |
||||
} |
||||
|
||||
|
||||
//========================================================================
|
||||
// Get the function pointer to an OpenGL function
|
||||
//========================================================================
|
||||
|
||||
void* _glfwPlatformGetProcAddress(const char* procname) |
||||
{ |
||||
return (void*) _glfw_eglGetProcAddress(procname); |
||||
} |
||||
|
||||
|
||||
//========================================================================
|
||||
// Copies the specified OpenGL state categories from src to dst
|
||||
//========================================================================
|
||||
|
||||
void _glfwPlatformCopyContext(_GLFWwindow* src, _GLFWwindow* dst, unsigned long mask) |
||||
{ |
||||
// AFAIK, EGL doesn't have this
|
||||
} |
||||
|
Loading…
Reference in New Issue