OpenGL ESメモ＠Yocto
前提
- Ubuntu 12.04
- Yocto Project 1.6.1 - Daisy
- gcc
- g++
- libegl-mesa
- libegl-mesa-dev
- libgles2-mesa
- libgles2-mesa-dev
テストコード
#include <stdlib.h>
#include <EGL/egl.h>
int main()
{
Display* xdisp = XOpenDisplay(NULL);
if(xdisp == NULL)
{
abort();
}
Window rootWin = DefaultRootWindow(xdisp);
int screen = DefaultScreen(xdisp);
unsigned long white = WhitePixel(xdisp, screen);
unsigned long black = BlackPixel(xdisp, screen);
Window window = XCreateSimpleWindow(
xdisp, rootWin,
100, 100,
640, 480,
2,
black, white);
#ifdef DEFAULT
EGLDisplay eglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
#else
EGLDisplay eglDisplay = eglGetDisplay((EGLNativeDisplayType)xdisp);
#endif
if(eglDisplay == EGL_NO_DISPLAY)
{
abort();
}
if(!eglInitialize(eglDisplay, NULL, NULL))
{
abort();
}
EGLint attr[] = {
EGL_BUFFER_SIZE, 16,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_NONE,
};
EGLConfig cfg;
EGLint numConfigs;
if(!eglChooseConfig(eglDisplay, attr, &cfg, 1, &numConfigs))
{
abort();
}
if(numConfigs != 1)
{
abort();
}
EGLSurface eglSurface = eglCreateWindowSurface(eglDisplay, cfg, window, NULL);
if(eglSurface == EGL_NO_SURFACE)
{
abort();
}
}
EGL_DEFAULT_DISPLAYで初期化
Native platform type: drm (build-time configuration)
# arm-poky-linux-gnueabi-g++ foo.cpp -lX11 -lEGL -DDEFAULT
# export EGL_LOG_LEVEL=debug
# ./a.out
libEGL debug: Native platform type: drm (build-time configuration)
libEGL debug: EGL search path is /usr/lib/egl
libEGL debug: added egl_dri2 to module array
libEGL debug: added egl_glx to module array
gbm_create_device: invalid fd: -1
libEGL warning: GLX: failed to load GLX
libEGL debug: EGL user error 0x3001 (EGL_NOT_INITIALIZED) in eglInitialize
Aborted
eglInitializeでEGL_NOT_INITIALIZED。
Native platform type: x11 (environment overwrite)
# export EGL_PLATFORM=x11
# ./a.out
libEGL debug: Native platform type: x11 (environment overwrite)
libEGL debug: EGL search path is /usr/lib/egl
libEGL debug: added egl_dri2 to module array
libEGL debug: added egl_glx to module array
libEGL warning: DRI2: failed to authenticate
libEGL debug: DRI2: dlopen(/usr/lib/dri/swrast_dri.so)
libEGL debug: DRI2: found extension `DRI_Core'
libEGL info: DRI2: found extension DRI_Core version 1
libEGL debug: DRI2: found extension `DRI_SWRast'
libEGL info: DRI2: found extension DRI_SWRast version 3
libEGL debug: DRI2: found extension `DRI_TexBuffer'
libEGL info: DRI2: found extension DRI_TexBuffer version 2
libEGL debug: the best driver is DRI2
libEGL debug: EGL user error 0x3003 (EGL_BAD_ALLOC) in xcb_get_geometry
Aborted
eglCreateWindowSurfaceでEGL_BAD_ALLOC。
X11のDisplayで初期化
Native platform type: x11 (autodetected)
# arm-poky-linux-gnueabi-g++ foo.cpp -lX11 -lEGL
# unset EGL_PLATFORM
# ./a.out
libEGL debug: Native platform type: x11 (autodetected)
libEGL debug: EGL search path is /usr/lib/egl
libEGL debug: added egl_dri2 to module array
libEGL debug: added egl_glx to module array
libEGL warning: DRI2: failed to authenticate
libEGL debug: DRI2: dlopen(/usr/lib/dri/swrast_dri.so)
libEGL debug: DRI2: found extension `DRI_Core'
libEGL info: DRI2: found extension DRI_Core version 1
libEGL debug: DRI2: found extension `DRI_SWRast'
libEGL info: DRI2: found extension DRI_SWRast version 3
libEGL debug: DRI2: found extension `DRI_TexBuffer'
libEGL info: DRI2: found extension DRI_TexBuffer version 2
libEGL debug: the best driver is DRI2
libEGL debug: Display 0x1b160 is destroyed with resources
正常終了。
Native platform type: drm (environment overwrite)
# export EGL_PLATFORM=drm
# ./a.out
libEGL debug: Native platform type: drm (environment overwrite)
libEGL debug: EGL search path is /usr/lib/egl
libEGL debug: added egl_dri2 to module array
libEGL debug: added egl_glx to module array
Segmentation fault
eglInitializeでSegmentation fault。
参考サイト
すらりん日記 ≫ Blog Archive ≫ Ubuntuで EGL使えるか?|No:3072|すらりん日記
http://blog.techlab-xe.net/archives/3072
Mesa EGL
http://www.mesa3d.org/egl.html
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2014/10/08 22:08:12