/*
 * Copyright 2013 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.
 */

#include <stdint.h>
#include <string.h>

#include <utils/TypeHelpers.h>

#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>

#include "Description.h"

namespace android {

Description::Description() :
    mUniformsDirty(true) {
    mPlaneAlpha = 1.0f;
    mPremultipliedAlpha = true;
    mOpaque = true;
    mTextureTarget = GL_TEXTURE_EXTERNAL_OES;

    const GLfloat m[16] = {1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1 };
    memset(mColor, 0, sizeof(mColor));
    memcpy(mProjectionMatrix, m, sizeof(mProjectionMatrix));
    memcpy(mTextureMatrix, m, sizeof(mTextureMatrix));
}

Description::~Description() {
}

void Description::setPlaneAlpha(GLclampf planeAlpha) {
    if (planeAlpha != mPlaneAlpha) {
        mUniformsDirty = true;
        mPlaneAlpha = planeAlpha;
    }
}

void Description::setPremultipliedAlpha(bool premultipliedAlpha) {
    if (premultipliedAlpha != mPremultipliedAlpha) {
        mPremultipliedAlpha = premultipliedAlpha;
    }
}

void Description::setOpaque(bool opaque) {
    if (opaque != mOpaque) {
        mOpaque = opaque;
    }
}

void Description::setTextureName(GLenum target, GLuint tname) {
    if (target != mTextureTarget) {
        mTextureTarget = target;
    }
    if (tname != mTextureName) {
        mTextureName = tname;
        mUniformsDirty = true;
    }
}

void Description::disableTexture() {
    if (mTextureTarget != 0) {
        mTextureTarget = 0;
    }
    mTextureName = 0;
}

void Description::setColor(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha) {
    mColor[0] = red;
    mColor[1] = green;
    mColor[2] = blue;
    mColor[3] = alpha;
    mUniformsDirty = true;
}

void Description::setProjectionMatrix(GLfloat const* mtx) {
    memcpy(mProjectionMatrix, mtx, sizeof(mProjectionMatrix));
    mUniformsDirty = true;
}

void Description::setTextureMatrix(GLfloat const* mtx) {
    memcpy(mTextureMatrix, mtx, sizeof(mTextureMatrix));
    mUniformsDirty = true;
}

} /* namespace android */