2012-08-16 131 views
1

我想獲得一個OpenGL項目正確呈現到iPhone視網膜顯示,我似乎遇到了一些困難。我已經爲設備設置了內容縮放因子,但現在幀緩衝區未能創建。Open GL ES視網膜顯示設置

這些都是在EAGLView int的createFramebuffer方法的子類中完成的。

這是我的設置:

glGenFramebuffersOES(1,& viewFramebuffer); glGenRenderbuffersOES(1,& viewRenderbuffer);

glBindFramebufferOES(GL_FRAMEBUFFER_OES, viewFramebuffer); 
glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer); 

self.contentScaleFactor = [[UIScreen mainScreen] scale]; 
[context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:(CAEAGLLayer*)self.layer]; 
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, viewRenderbuffer); 


glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &backingWidth); 
glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &backingHeight);//Depth 
glGenRenderbuffersOES(1, &depthRenderbuffer); 
glBindRenderbufferOES(GL_RENDERBUFFER_OES, depthRenderbuffer); 
glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_DEPTH_COMPONENT16_OES, backingWidth, backingHeight); 
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES, GL_RENDERBUFFER_OES, depthRenderbuffer); 


glEnable(GL_DEPTH_TEST); 
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); 
glEnable(GL_BLEND); 



NSLog(@"scale Factor: %f",self.contentScaleFactor); 

比例因子報告正確,但顯示不會呈現,並且緩衝區無法創建。我在這裏錯過了什麼嗎?

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backingWidth和backingHeight在結尾處有什麼值?這些視圖的像素大小是否正確?你是通過'glCheckFramebufferStatus(GL_FRAMEBUFFER)'還是另一種方式檢查framebuffer的狀態? – 2012-08-16 20:06:29

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檢查我得到的值:比例因子:2.000000 backingWidth:640 backingHeight:960。這些是我的顯示器的正確尺寸。而glCheckFramebufferStatus(GL_FRAMEBUFFER)不會返回GL_FRAMEBUFFER_COMPLETE_OES。 – jcb344 2012-08-16 20:30:19

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@ jcb344我遇到類似的問題,你解決了這個問題嗎? – rraallvv 2013-03-24 05:23:43

回答

0

我遇到了同樣的問題。你只需要將屏幕尺寸乘以屏幕比例就可以了,如我在this答案中所述。