多個GL紋理（實時）渲染速度太慢

-1

我要在同一時間繪製2個紋理。（來自不同的視頻，實時獲得不同的幀紋理...）它運行良好，代碼如下。多個GL紋理（實時）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。我檢查了glTexSubImage2D而不是glTexImage2D，但沒有好的結果。

有什麼解決方案加快速度？

來源

2015-04-16 sky1224

你是否真的在每一幀都做了這個紋理對象的創建/銷燬？ –

我知道它不好，所以請讓我知道解決方案。爲什麼人們在沒有正確答案的情況下倒退？ – sky1224

我得到了解決方案，我一開始只調用一次glGenTextures，然後循環繪製。速度現在翻了一番。我將用glTexSubImage2D替換glTexImage2D。我刪除了glDeleteTextures！

CVOpenGLESTextureCacheRef，這是加速的真棒鑰匙！幾乎實時！

來源

2015-04-17 05:19:06 sky1224

多個GL紋理（實時）渲染速度太慢

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