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我有 EGL/GLES 2.0 代码,我尝试在 Linux(通过 Mesa)和 Android(即将推出 iOS)上运行。在 Linux 上,它工作正常并且呈现出预期的效果。在 Android(手机、平板电脑和模拟器 - 所有 4.01)上运行它可以正常运行,但不显示任何内容(屏幕保持黑色)。所有 3 的代码 99% 相同 - 对 Android 进行了一些特殊处理。遵循我的 EGL 属性:

EGLint attribList[] =
{
    EGL_SURFACE_TYPE,   EGL_WINDOW_BIT,
    EGL_RED_SIZE,       8,
    EGL_GREEN_SIZE,     8,
    EGL_BLUE_SIZE,      8,
    //EGL_ALPHA_SIZE,     (flags & ES_WINDOW_ALPHA) ? 8 : EGL_DONT_CARE,
    //EGL_DEPTH_SIZE,     (flags & ES_WINDOW_DEPTH) ? 8 : EGL_DONT_CARE,
    //EGL_STENCIL_SIZE,   (flags & ES_WINDOW_STENCIL) ? 8 : EGL_DONT_CARE,
    EGL_SAMPLE_BUFFERS, (flags & ES_WINDOW_MULTISAMPLE) ? 1 : 0,
    // For Android this is extremely important - eglCreateContext will fail without it
    EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
    EGL_NONE, EGL_NONE
};

遵循 EGL 创建代码:

EGLint numConfigs;
EGLint majorVersion;
EGLint minorVersion;
EGLDisplay display;
EGLContext context;
EGLSurface surface;
EGLConfig config;
EGLint contextAttribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE, EGL_NONE };

// Get Display
display = eglGetDisplay((EGLNativeDisplayType)x_display);
if ( display == EGL_NO_DISPLAY )
{
  esLogMessage("eglGetDisplay failed %d\n", eglGetError());
   return EGL_FALSE;
}

// Initialize EGL
if ( !eglInitialize(display, &majorVersion, &minorVersion) )
{
  esLogMessage("eglInitialize failed %d\n", eglGetError());
   return EGL_FALSE;
}

static const size_t CONFIG_COUNT = 128;
EGLConfig configs[CONFIG_COUNT];

// Get configs
if ( !eglGetConfigs(display, configs, CONFIG_COUNT, &numConfigs) )
{
  esLogMessage("eglGetConfigs failed %d\n", eglGetError());
   return EGL_FALSE;
}
else if( numConfigs == 0 )
{
   esLogMessage("eglGetConfigs found no configs for the display\n");
   return EGL_FALSE;
}

EGLint chosenConfigCount = 0;
// Choose config
if ( !eglChooseConfig(display, attribList, &config, 1, &chosenConfigCount) )
{
  esLogMessage("eglChooseConfig failed %d\n", eglGetError());
   return EGL_FALSE;
}
else if( chosenConfigCount == 0 )
{
   esLogMessage("eglChooseConfig found no matching configs (%d available)\n", numConfigs);
   return EGL_FALSE;
}

EGLint format;
/* EGL_NATIVE_VISUAL_ID is an attribute of the EGLConfig that is
 * guaranteed to be accepted by ANativeWindow_setBuffersGeometry().
 * As soon as we picked a EGLConfig, we can safely reconfigure the
 * ANativeWindow buffers to match, using EGL_NATIVE_VISUAL_ID. */
if( !eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID, &format) )
{
   esLogMessage("eglGetConfigAttrib failed %d\n", eglGetError());
   return EGL_FALSE;
}

#ifdef ANDROID

if( ANativeWindow_setBuffersGeometry(hWnd, 0, 0, format) )
{
   esLogMessage("ANativeWindow_setBuffersGeometry failed\n");
   return EGL_FALSE;
}

#endif

// Create a surface
surface = eglCreateWindowSurface(display, config, (EGLNativeWindowType)hWnd, NULL);
if ( surface == EGL_NO_SURFACE )
{
   esLogMessage("eglCreateWindowSurface failed %d\n", eglGetError());
   return EGL_FALSE;
}

// Create a GL context
context = eglCreateContext(display, config, EGL_NO_CONTEXT, contextAttribs );
if ( context == EGL_NO_CONTEXT )
{
   esLogMessage("eglCreateContext failed %d\n", eglGetError());
   return EGL_FALSE;
}   

// Make the context current
if ( !eglMakeCurrent(display, surface, surface, context) )
{
  esLogMessage("eglMakeCurrent failed %d\n", eglGetError());
   return EGL_FALSE;
}

有人可以阐明,要测试什么或如何找到问题吗?

编辑:

我修复了一些其他错误,现在它在 Android 模拟器和HP 触摸板(Cyanogenmod 9 alpha)中运行良好,但仍然导致我的三星 Galaxy S1Cyanogenmod 9 *sigh*出现黑屏。

4

1 回答 1

0

首先,请注意:您不需要两个EGL_NONE来结束属性定义。

其次,您的问题来自eglGetConfigs()返回可用配置的事实,但eglChooseConfig(...,1,..)不一定会返回与您请求的配置完全匹配的配置。因此,您必须扫描配置以找到最接近您需求的配置。

例如,您必须调用eglGetConfigAttrib()比较,EGL_RED_SIZE, EGL_GREEN_SIZE, EGL_BLUE_SIZE, EGL_ALPHA_SIZE, EGL_RENDERABLE_TYPE, EGL_DEPTH_SIZE, EGL_STENCIL_SIZE

有关详细信息,请参阅eglChooseConfig()

于 2013-05-04T13:09:00.613 回答