我正在尝试将我的应用程序切换为使用帧缓冲区/渲染缓冲区对象(希望稍后渲染到纹理),但是每当我使用帧缓冲区/渲染缓冲区时,什么都不会渲染。当默认帧缓冲区保持打开状态时,默认情况下,它渲染得很好;所有颜色、深度和模板相关的功能都完全按照预期工作。
初始化代码:
if(frameBuffer == 0 || !GLES20.glIsFramebuffer(frameBuffer)){
int[] retVal = new int[1];
GLES20.glGenFramebuffers(1, retVal, 0);
frameBuffer = retVal[0];
retVal[0] = 0;
if(renderBufferColour != 0 || !GLES20.glIsRenderbuffer(renderBufferColour)){
GLES20.glGenRenderbuffers(1, retVal, 0);
renderBufferColour = retVal[0];
}
if(renderBufferDepth != 0 || !GLES20.glIsRenderbuffer(renderBufferDepth)){
GLES20.glGenRenderbuffers(1, retVal, 0);
renderBufferDepth = retVal[0];
}
if(renderBufferStencil != 0 || !GLES20.glIsRenderbuffer(renderBufferStencil)){
GLES20.glGenRenderbuffers(1, retVal, 0);
renderBufferStencil = retVal[0];
}
}
帧缓冲启用代码(注释掉这个允许使用默认缓冲区进行渲染):
GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, frameBuffer);
GLES20.glBindRenderbuffer(GLES20.GL_RENDERBUFFER, renderBufferColour);
GLES20.glRenderbufferStorage(GLES20.GL_RENDERBUFFER, GLES20.GL_RGBA4, width, height);
GLES20.glFramebufferRenderbuffer(
GLES20.GL_FRAMEBUFFER,
GLES20.GL_COLOR_ATTACHMENT0,
GLES20.GL_RENDERBUFFER,
renderBufferColour);
GLES20.glBindRenderbuffer(GLES20.GL_RENDERBUFFER, renderBufferDepth);
GLES20.glRenderbufferStorage(GLES20.GL_RENDERBUFFER, GLES20.GL_DEPTH_COMPONENT16, width, height);
GLES20.glFramebufferRenderbuffer(
GLES20.GL_FRAMEBUFFER,
GLES20.GL_DEPTH_ATTACHMENT,
GLES20.GL_RENDERBUFFER,
renderBufferDepth);
GLES20.glBindRenderbuffer(GLES20.GL_RENDERBUFFER, renderBufferStencil);
GLES20.glRenderbufferStorage(GLES20.GL_RENDERBUFFER, GLES20.GL_STENCIL_INDEX8, width, height);
GLES20.glFramebufferRenderbuffer(
GLES20.GL_FRAMEBUFFER,
GLES20.GL_STENCIL_ATTACHMENT,
GLES20.GL_RENDERBUFFER,
renderBufferStencil);
if (GLES20.glCheckFramebufferStatus(GLES20.GL_FRAMEBUFFER) != GLES20.GL_FRAMEBUFFER_COMPLETE)
throw new RuntimeException(String.format("Failed to make complete framebuffer object %x", GLES20.glCheckFramebufferStatus(GLES20.GL_FRAMEBUFFER)));
最后的异常不会被抛出,并且glGetError()
在每一步之后检查时,不会返回任何错误。我在这里错过了什么吗?