多个GL纹理（实时）渲染速度太慢

-1

我要在同一时间绘制2个纹理。（来自不同的视频，实时获得不同的帧纹理...）它运行良好，代码如下。多个GL纹理（实时）渲染速度太慢

// module 1--------------- 
{ 
    CVPixelBufferLockBaseAddress(cameraFrame, 0); 
    int bufferHeight = CVPixelBufferGetHeight(cameraFrame); 
    int bufferWidth = CVPixelBufferGetWidth(cameraFrame); 

    // Create a new texture from the camera frame data, display that using the shaders 
    glGenTextures(1, &videoFrameTexture); 
    glBindTexture(GL_TEXTURE_2D, videoFrameTexture); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 
    // This is necessary for non-power-of-two textures 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 

    // Using BGRA extension to pull in video frame data directly 
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bufferWidth, bufferHeight, 0, GL_BGRA, GL_UNSIGNED_BYTE, CVPixelBufferGetBaseAddress(cameraFrame)); 
} 
{ 
    CVPixelBufferLockBaseAddress(buf2, 0); 
    int bufferHeight = CVPixelBufferGetHeight(buf2); 
    int bufferWidth = CVPixelBufferGetWidth(buf2); 
    // Create a new texture from the camera frame data, display that using the shaders 
    glGenTextures(1, &videoFrameTexture2); 
    glBindTexture(GL_TEXTURE_2D, videoFrameTexture2); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 
    // This is necessary for non-power-of-two textures 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 

    // Using BGRA extension to pull in video frame data directly 
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bufferWidth, bufferHeight, 0, GL_BGRA, GL_UNSIGNED_BYTE, CVPixelBufferGetBaseAddress(buf2)); 
} 

[self drawFrame]; // module2--------- 

{ 
    glDeleteTextures(1, &videoFrameTexture); 
    CVPixelBufferUnlockBaseAddress(cameraFrame, 0); 
    glDeleteTextures(1, &videoFrameTexture2); 
    CVPixelBufferUnlockBaseAddress(buf2, 0); 
}

但是它的速度太慢了。主要是module2很慢。我检查了glTexSubImage2D而不是glTexImage2D，但没有好的结果。

有什么解决方案加快速度？

来源

2015-04-16 sky1224

你是否真的在每一帧都做了这个纹理对象的创建/销毁？ –

我知道它不好，所以请让我知道解决方案。为什么人们在没有正确答案的情况下倒退？ – sky1224

我得到了解决方案，我一开始只调用一次glGenTextures，然后循环绘制。速度现在翻了一番。我将用glTexSubImage2D替换glTexImage2D。我删除了glDeleteTextures！

CVOpenGLESTextureCacheRef，这是加速的真棒钥匙！几乎实时！

来源

2015-04-17 05:19:06 sky1224

多个GL纹理（实时）渲染速度太慢

回答

相关问题