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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.gallery3d.ui;
import android.opengl.GLU;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import javax.microedition.khronos.opengles.GL11;
import javax.microedition.khronos.opengles.GL11Ext;
import javax.microedition.khronos.opengles.GL11ExtensionPack;
/**
* A wrapper class of GL 2D texture.
*/
public class Raw2DTexture extends BasicTexture {
private static final int[] sTextureId = new int[1];
// OpenGL related fields used when copy.
private static final int[] sBufferName = new int[1];
private int mFBO; // Frame buffer object.
// We need copy from another texture when in camera capture animation.
// The copy is done through a framebuffer object with an attached
// destination texture. The source texture is rendered to the framebuffer
// and the data will be stored in the destination texture.
public static void copy(GLCanvas canvas, BasicTexture src, Raw2DTexture dst) {
int[] viewPort = new int[4];
GL11 gl11 = canvas.getGLInstance();
GL11ExtensionPack gl11ep = (GL11ExtensionPack) gl11;
if (!dst.isLoaded(canvas)) {
dst.prepare(canvas.getGLInstance());
}
gl11ep.glBindFramebufferOES(GL11ExtensionPack.GL_FRAMEBUFFER_OES, dst.mFBO);
gl11ep.glFramebufferTexture2DOES(
GL11ExtensionPack.GL_FRAMEBUFFER_OES,
GL11ExtensionPack.GL_COLOR_ATTACHMENT0_OES,
GL11.GL_TEXTURE_2D,
dst.getId(), 0);
checkFramebufferStatus(gl11ep);
// Draw the source onto our destination.
// The texture coords and vertex pointer are already set properly. We don't
// need to set again.
gl11.glBindTexture(src.getTarget(), src.getId());
boolean targetEnabled = gl11.glIsEnabled(src.getTarget());
gl11.glEnable(src.getTarget());
// Set the texture matrix.
gl11.glMatrixMode(GL11.GL_TEXTURE);
gl11.glPushMatrix();
gl11.glLoadIdentity();
// Set the view port.
gl11.glGetIntegerv(GL11.GL_VIEWPORT, viewPort, 0);
gl11.glViewport(0, 0, dst.getTextureWidth(), dst.getTextureHeight());
// Set the projection matrix.
gl11.glMatrixMode(GL11.GL_PROJECTION);
gl11.glPushMatrix();
gl11.glLoadIdentity();
GLU.gluOrtho2D(gl11, 0, 1, 0, 1);
// Set the modelview matrix.
gl11.glMatrixMode(GL11.GL_MODELVIEW);
gl11.glPushMatrix();
gl11.glLoadIdentity();
// Draw the texture.
gl11.glDrawArrays(GL11.GL_TRIANGLE_STRIP, 0, 4);
// Clear.
if (!targetEnabled) gl11.glDisable(src.getTarget());
gl11ep.glBindFramebufferOES(GL11ExtensionPack.GL_FRAMEBUFFER_OES, 0);
gl11.glBindTexture(src.getTarget(), 0);
gl11.glViewport(viewPort[0], viewPort[1], viewPort[2], viewPort[3]);
gl11.glMatrixMode(GL11.GL_TEXTURE);
gl11.glPopMatrix();
gl11.glMatrixMode(GL11.GL_PROJECTION);
gl11.glPopMatrix();
gl11.glMatrixMode(GL11.GL_MODELVIEW);
gl11.glPopMatrix();
GLId.glDeleteFramebuffers(gl11ep, 1, dst.sBufferName, 0);
}
public Raw2DTexture(int w, int h) {
setSize(w, h);
GLId.glGenTextures(1, sTextureId, 0);
mId = sTextureId[0];
GLId.glGenBuffers(1, sBufferName, 0);
mFBO = sBufferName[0];
}
private void prepare(GL11 gl11) {
gl11.glBindTexture(GL11.GL_TEXTURE_2D, mId);
gl11.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP_TO_EDGE);
gl11.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL11.GL_CLAMP_TO_EDGE);
gl11.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
gl11.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
gl11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA,
getTextureWidth(), getTextureHeight(),
0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, null);
gl11.glBindTexture(GL11.GL_TEXTURE_2D, 0);
mState = UploadedTexture.STATE_LOADED;
}
@Override
protected boolean onBind(GLCanvas canvas) {
if (!isLoaded(canvas)) {
return false;
}
return true;
}
@Override
public int getTarget() {
return GL11.GL_TEXTURE_2D;
}
public boolean isOpaque() {
return true;
}
@Override
public void yield() {
// we cannot free the texture because we have no backup.
}
private static void checkFramebufferStatus(GL11ExtensionPack gl11ep) {
int status = gl11ep.glCheckFramebufferStatusOES(GL11ExtensionPack.GL_FRAMEBUFFER_OES);
if (status != GL11ExtensionPack.GL_FRAMEBUFFER_COMPLETE_OES) {
String msg = "";
switch (status) {
case GL11ExtensionPack.GL_FRAMEBUFFER_INCOMPLETE_FORMATS_OES:
msg = "FRAMEBUFFER_FORMATS"; break;
case GL11ExtensionPack.GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES:
msg = "FRAMEBUFFER_ATTACHMENT"; break;
case GL11ExtensionPack.GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_OES:
msg = "FRAMEBUFFER_MISSING_ATTACHMENT"; break;
case GL11ExtensionPack.GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_OES:
msg = "FRAMEBUFFER_DRAW_BUFFER"; break;
case GL11ExtensionPack.GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_OES:
msg = "FRAMEBUFFER_READ_BUFFER"; break;
case GL11ExtensionPack.GL_FRAMEBUFFER_UNSUPPORTED_OES:
msg = "FRAMEBUFFER_UNSUPPORTED"; break;
case GL11ExtensionPack.GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_OES:
msg = "FRAMEBUFFER_INCOMPLETE_DIMENSIONS"; break;
}
throw new RuntimeException(msg + ":" + Integer.toHexString(status));
}
}
}
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