Example usage for android.opengl EGL14 EGL_NO_CONTEXT

Introduction

In this page you can find the example usage for android.opengl EGL14 EGL_NO_CONTEXT.

Prototype

EGLContext EGL_NO_CONTEXT

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Usage

From source file:Main.java

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
private static int getMaxTextureEgl14() {
    EGLDisplay dpy = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY);
    int[] vers = new int[2];
    EGL14.eglInitialize(dpy, vers, 0, vers, 1);

    int[] configAttr = { EGL14.EGL_COLOR_BUFFER_TYPE, EGL14.EGL_RGB_BUFFER, EGL14.EGL_LEVEL, 0,
            EGL14.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT, EGL14.EGL_SURFACE_TYPE, EGL14.EGL_PBUFFER_BIT,
            EGL14.EGL_NONE };/*from w w  w .j a va2 s .  co m*/
    EGLConfig[] configs = new EGLConfig[1];
    int[] numConfig = new int[1];
    EGL14.eglChooseConfig(dpy, configAttr, 0, configs, 0, 1, numConfig, 0);
    if (numConfig[0] == 0) {
        return 0;
    }
    EGLConfig config = configs[0];

    int[] surfAttr = { EGL14.EGL_WIDTH, 64, EGL14.EGL_HEIGHT, 64, EGL14.EGL_NONE };
    EGLSurface surf = EGL14.eglCreatePbufferSurface(dpy, config, surfAttr, 0);

    int[] ctxAttrib = { EGL14.EGL_CONTEXT_CLIENT_VERSION, 2, EGL14.EGL_NONE };
    EGLContext ctx = EGL14.eglCreateContext(dpy, config, EGL14.EGL_NO_CONTEXT, ctxAttrib, 0);

    EGL14.eglMakeCurrent(dpy, surf, surf, ctx);

    int[] maxSize = new int[1];
    GLES20.glGetIntegerv(GLES20.GL_MAX_TEXTURE_SIZE, maxSize, 0);

    EGL14.eglMakeCurrent(dpy, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_CONTEXT);
    EGL14.eglDestroySurface(dpy, surf);
    EGL14.eglDestroyContext(dpy, ctx);
    EGL14.eglTerminate(dpy);

    return maxSize[0];
}

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From source file:Main.java

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
private static int getMaxTextureEgl14() {
    EGLDisplay dpy = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY);
    int[] vers = new int[2];
    EGL14.eglInitialize(dpy, vers, 0, vers, 1);

    int[] configAttr = { EGL14.EGL_COLOR_BUFFER_TYPE, EGL14.EGL_RGB_BUFFER, EGL14.EGL_LEVEL, 0,
            EGL14.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT, EGL14.EGL_SURFACE_TYPE, EGL14.EGL_PBUFFER_BIT,
            EGL14.EGL_NONE };//from  www .  j  a  v  a2s .co  m
    EGLConfig[] configs = new EGLConfig[1];
    int[] numConfig = new int[1];
    EGL14.eglChooseConfig(dpy, configAttr, 0, configs, 0, 1, numConfig, 0);
    if (numConfig[0] == 0) {
        return 0;
    }
    EGLConfig config = configs[0];

    int[] surfAttr = { EGL14.EGL_WIDTH, 64, EGL14.EGL_HEIGHT, 64, EGL14.EGL_NONE };
    EGLSurface surf = EGL14.eglCreatePbufferSurface(dpy, config, surfAttr, 0);

    int[] ctxAttribute = { EGL14.EGL_CONTEXT_CLIENT_VERSION, 2, EGL14.EGL_NONE };
    EGLContext ctx = EGL14.eglCreateContext(dpy, config, EGL14.EGL_NO_CONTEXT, ctxAttribute, 0);

    EGL14.eglMakeCurrent(dpy, surf, surf, ctx);

    int[] maxSize = new int[1];
    GLES20.glGetIntegerv(GLES20.GL_MAX_TEXTURE_SIZE, maxSize, 0);

    EGL14.eglMakeCurrent(dpy, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_CONTEXT);
    EGL14.eglDestroySurface(dpy, surf);
    EGL14.eglDestroyContext(dpy, ctx);
    EGL14.eglTerminate(dpy);

    return maxSize[0];
}

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From source file:Main.java

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
private static int getOpenGLMaxTextureSizeJB1() {
    // Then get a hold of the default display, and initialize.
    // This could get more complex if you have to deal with devices that could have multiple displays,
    // but will be sufficient for a typical phone/tablet:
    android.opengl.EGLDisplay dpy = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY);
    int[] vers = new int[2];
    EGL14.eglInitialize(dpy, vers, 0, vers, 1);

    // Next, we need to find a config. Since we won't use this context for rendering,
    // the exact attributes aren't very critical:
    int[] configAttr = { EGL14.EGL_COLOR_BUFFER_TYPE, EGL14.EGL_RGB_BUFFER, EGL14.EGL_LEVEL, 0,
            EGL14.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT, EGL14.EGL_SURFACE_TYPE, EGL14.EGL_PBUFFER_BIT,
            EGL14.EGL_NONE };/*from   w ww.j ava2  s  .co  m*/
    android.opengl.EGLConfig[] configs = new android.opengl.EGLConfig[1];
    int[] numConfig = new int[1];
    EGL14.eglChooseConfig(dpy, configAttr, 0, configs, 0, 1, numConfig, 0);
    //noinspection StatementWithEmptyBody
    if (numConfig[0] == 0) {
        // TROUBLE! No config found.
    }
    android.opengl.EGLConfig config = configs[0];

    // To make a context current, which we will need later,
    // you need a rendering surface, even if you don't actually plan to render.
    // To satisfy this requirement, create a small offscreen (Pbuffer) surface:
    int[] surfAttr = { EGL14.EGL_WIDTH, 64, EGL14.EGL_HEIGHT, 64, EGL14.EGL_NONE };
    android.opengl.EGLSurface surf = EGL14.eglCreatePbufferSurface(dpy, config, surfAttr, 0);

    // Next, create the context:
    int[] ctxAttrib = { EGL14.EGL_CONTEXT_CLIENT_VERSION, 2, EGL14.EGL_NONE };
    android.opengl.EGLContext ctx = EGL14.eglCreateContext(dpy, config, EGL14.EGL_NO_CONTEXT, ctxAttrib, 0);

    // Ready to make the context current now:
    EGL14.eglMakeCurrent(dpy, surf, surf, ctx);

    // If all of the above succeeded (error checking was omitted), you can make your OpenGL calls now:
    int[] maxSize = new int[1];
    GLES20.glGetIntegerv(GLES20.GL_MAX_TEXTURE_SIZE, maxSize, 0);

    // Once you're all done, you can tear down everything:
    EGL14.eglMakeCurrent(dpy, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_CONTEXT);
    EGL14.eglDestroySurface(dpy, surf);
    EGL14.eglDestroyContext(dpy, ctx);
    EGL14.eglTerminate(dpy);

    return maxSize[0];
}

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