OpenGL ES 2.0 FBO创建错误,未知错误

Question

我一直在努力解决这个问题,而且这个代码对我来说不明原因崩溃了.我正在创建一个FBO,绑定一个纹理,然后第一个glDrawArrays()在我的iPhone模拟器上崩溃了"EXC_BAD_ACCESS".

这是我用来创建FBO的代码(并绑定纹理和......)

glGenFramebuffers(1, &lastFrameBuffer);
glGenRenderbuffers(1, &lastFrameDepthBuffer);
glGenTextures(1, &lastFrameTexture);

glBindTexture(GL_TEXTURE1, lastFrameTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 768, 1029, 0, GL_RGBA, GL_UNSIGNED_SHORT_5_6_5, NULL);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

//Bind/alloc depthbuf
glBindRenderbuffer(GL_RENDERBUFFER, lastFrameDepthBuffer);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, 768, 1029);

glBindFramebuffer(GL_FRAMEBUFFER, lastFrameBuffer);

//binding the texture to the FBO :D
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, lastFrameTexture, 0);

// attach the renderbuffer to depth attachment point
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, lastFrameDepthBuffer);

[self checkFramebufferStatus];

正如您所看到的,它参与了一个对象,checkFrameBufferStatus如下所示:

GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
switch(status)
{
  case GL_FRAMEBUFFER_COMPLETE:
    JNLogString(@"Framebuffer complete.");
    return TRUE;

  case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
    JNLogString(@"[ERROR] Framebuffer incomplete: Attachment is NOT complete.");
    return false;

  case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
    JNLogString(@"[ERROR] Framebuffer incomplete: No image is attached to FBO.");
    return false;

  case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
    JNLogString(@"[ERROR] Framebuffer incomplete: Attached images have different dimensions.");
    return false;

  case GL_FRAMEBUFFER_UNSUPPORTED:
    JNLogString(@"[ERROR] Unsupported by FBO implementation.");
    return false;

   default:
    JNLogString(@"[ERROR] Unknown error.");
    return false;

JNLogString只是一个NSLog,在这种情况下它给了我:

2010-04-03 02:46:54.854 Bubbleeh[6634:207] ES2Renderer.m:372 [ERROR] Unknown error.

当我在那里打电话的时候.

所以,它崩溃,诊断告诉我有一个未知的错误,我有点卡住了.我基本上复制了OpenGL ES 2.0编程指南中的代码...

我究竟做错了什么？

Answer 1

        glBindTexture(GL_TEXTURE1, lastFrameTexture);

这是不允许的，我试图将纹理绑定到单元一（GL_TEXTURE1），但这应该由 glActiveTexture() 完成，而不是由 glBindTexture() 完成，glBindTexture() 想要知道纹理的类型（GL_TEXTURE_2D、GL_TEXTURE_3D 等）。 ）不是纹理单元。为了将纹理放置在纹理单元 1 中，我现在拥有以下我认为正确的代码：

//Bind 2D Texture lastFrameTexture to texture unit 1
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, lastFrameTexture);