我已经为此苦苦挣扎了一段时间,对我来说,这段代码因未知原因而崩溃。我正在创建一个 FBO,绑定一个纹理,然后第一个 glDrawArrays() 在我的 iPhone 模拟器上以“EXC_BAD_ACCESS”崩溃。
这是我用来创建 FBO 的代码(以及绑定纹理和...)
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];
正如你所看到的,它参与了一个对象,checkFrameBufferStatus 看起来像这样:
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.
当我在那里打电话时。
所以,它崩溃了,诊断告诉我有一个未知的错误,我有点卡住了。我基本上从 OpenGL ES 2.0 Programming Guide 中复制了代码...
我究竟做错了什么?