private int setupRenderTextureAndRenderbuffer(final int width, final int height) {
if (this.mTextureId != -1) {
GLES20.glDeleteTextures(1, new int[] {this.mTextureId}, 0);
}
if (this.mRenderbufferId != -1) {
GLES20.glDeleteRenderbuffers(1, new int[] {this.mRenderbufferId}, 0);
}
if (this.mFramebufferId != -1) {
GLES20.glDeleteFramebuffers(1, new int[] {this.mFramebufferId}, 0);
}
this.mTextureId = this.createTexture(width, height, this.mTextureFormat, this.mTextureType);
this.mTextureFormatChanged = false;
this.checkGlError("setupRenderTextureAndRenderbuffer: create texture");
final int[] renderbufferIds = {0};
GLES20.glGenRenderbuffers(1, renderbufferIds, 0);
GLES20.glBindRenderbuffer(GLES20.GL_RENDERBUFFER, renderbufferIds[0]);
GLES20.glRenderbufferStorage(
GLES20.GL_RENDERBUFFER, GLES20.GL_DEPTH_COMPONENT16, width, height);
this.mRenderbufferId = renderbufferIds[0];
this.checkGlError("setupRenderTextureAndRenderbuffer: create renderbuffer");
final int[] framebufferIds = {0};
GLES20.glGenFramebuffers(1, framebufferIds, 0);
GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, framebufferIds[0]);
this.mFramebufferId = framebufferIds[0];
GLES20.glFramebufferTexture2D(
GLES20.GL_FRAMEBUFFER,
GLES20.GL_COLOR_ATTACHMENT0,
GLES20.GL_TEXTURE_2D,
this.mTextureId,
0);
GLES20.glFramebufferRenderbuffer(
GLES20.GL_FRAMEBUFFER,
GLES20.GL_DEPTH_ATTACHMENT,
GLES20.GL_RENDERBUFFER,
renderbufferIds[0]);
final int status = GLES20.glCheckFramebufferStatus(GLES20.GL_FRAMEBUFFER);
if (status != GLES20.GL_FRAMEBUFFER_COMPLETE) {
final String s = "Framebuffer is not complete: ";
final String value = String.valueOf(Integer.toHexString(status));
throw new RuntimeException((value.length() != 0) ? s.concat(value) : new String(s));
}
GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
return framebufferIds[0];
}
private void genFBO(GL10 glUnused) {
fboWidth = camera.getViewport().getWidth();
fboHeight = camera.getViewport().getHeight();
GLES20.glGenFramebuffers(1, fb, 0);
GLES20.glGenRenderbuffers(1, depthRb, 0);
GLES20.glGenTextures(1, renderTex, 0);
// generate texture
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, renderTex[0]);
// parameters - we have to make sure we clamp the textures to the edges
GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);
GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
// create it
// create an empty intbuffer first
int[] buf = new int[fboWidth * fboHeight];
IntBuffer texBuffer =
ByteBuffer.allocateDirect(buf.length * 4).order(ByteOrder.nativeOrder()).asIntBuffer();
// generate the textures
GLES20.glTexImage2D(
GLES20.GL_TEXTURE_2D,
0,
GLES20.GL_RGB,
fboWidth,
fboHeight,
0,
GLES20.GL_RGB,
GLES20.GL_UNSIGNED_BYTE,
texBuffer);
// create render buffer and bind 16-bit depth buffer
GLES20.glBindRenderbuffer(GLES20.GL_RENDERBUFFER, depthRb[0]);
GLES20.glRenderbufferStorage(
GLES20.GL_RENDERBUFFER, GLES20.GL_DEPTH_COMPONENT16, fboWidth, fboHeight);
}
@Override
public void glBindRenderbuffer(int target, int renderbuffer) {
GLES20.glBindRenderbuffer(target, renderbuffer);
}
