#ifndef _TCUSURFACE_HPP
#define _TCUSURFACE_HPP
/*-------------------------------------------------------------------------
 * drawElements Quality Program Tester Core
 * ----------------------------------------
 *
 * Copyright 2014 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.
 *
 *//*!
 * \file
 * \brief RGBA8888 surface class.
 *//*--------------------------------------------------------------------*/

#include "tcuDefs.hpp"
#include "tcuRGBA.hpp"
#include "tcuTexture.hpp"

#include "deArrayBuffer.hpp"

namespace tcu
{

/*--------------------------------------------------------------------*//*!
 * \brief RGBA8888 surface
 *
 * Surface provides basic pixel storage functionality. Only single format
 * (RGBA8888) is supported.
 *
 * PixelBufferAccess (see tcuTexture.h) provides much more flexible API
 * for handling various pixel formats. This is mainly a convinience class.
 *//*--------------------------------------------------------------------*/
class Surface
{
public:
    Surface(void);
    Surface(int width, int height);
    ~Surface(void);

    void setSize(int width, int height);

    int getWidth(void) const
    {
        return m_width;
    }
    int getHeight(void) const
    {
        return m_height;
    }

    void setPixel(int x, int y, RGBA col);
    RGBA getPixel(int x, int y) const;

    ConstPixelBufferAccess getAccess(void) const;
    PixelBufferAccess getAccess(void);

private:
    // \note Copy constructor and assignment operators are public and auto-generated

    int m_width;
    int m_height;
    de::ArrayBuffer<uint32_t> m_pixels;
} DE_WARN_UNUSED_TYPE;

inline void Surface::setPixel(int x, int y, RGBA col)
{
    DE_ASSERT(de::inBounds(x, 0, m_width) && de::inBounds(y, 0, m_height));

    const int pixOffset = y * m_width + x;
    uint32_t *pixAddr   = m_pixels.getElementPtr(pixOffset);

#if (DE_ENDIANNESS == DE_LITTLE_ENDIAN)
    *pixAddr = col.getPacked();
#else
    *((uint8_t *)pixAddr + 0) = (uint8_t)col.getRed();
    *((uint8_t *)pixAddr + 1) = (uint8_t)col.getGreen();
    *((uint8_t *)pixAddr + 2) = (uint8_t)col.getBlue();
    *((uint8_t *)pixAddr + 3) = (uint8_t)col.getAlpha();
#endif
}

inline RGBA Surface::getPixel(int x, int y) const
{
    DE_ASSERT(de::inBounds(x, 0, m_width) && de::inBounds(y, 0, m_height));

    const int pixOffset     = y * m_width + x;
    const uint32_t *pixAddr = m_pixels.getElementPtr(pixOffset);

    DE_STATIC_ASSERT(RGBA::RED_SHIFT == 0 && RGBA::GREEN_SHIFT == 8 && RGBA::BLUE_SHIFT == 16 &&
                     RGBA::ALPHA_SHIFT == 24);

#if (DE_ENDIANNESS == DE_LITTLE_ENDIAN)
    return RGBA(*pixAddr);
#else
    const uint8_t *byteAddr   = (const uint8_t *)pixAddr;
    return RGBA(byteAddr[0], byteAddr[1], byteAddr[2], byteAddr[3]);
#endif
}

/** Get pixel buffer access from surface. */
inline ConstPixelBufferAccess Surface::getAccess(void) const
{
    return ConstPixelBufferAccess(TextureFormat(TextureFormat::RGBA, TextureFormat::UNORM_INT8), m_width, m_height, 1,
                                  m_pixels.empty() ? DE_NULL : m_pixels.getPtr());
}

/** Get pixel buffer access from surface. */
inline PixelBufferAccess Surface::getAccess(void)
{
    return PixelBufferAccess(TextureFormat(TextureFormat::RGBA, TextureFormat::UNORM_INT8), m_width, m_height, 1,
                             m_pixels.empty() ? DE_NULL : m_pixels.getPtr());
}

} // namespace tcu

#endif // _TCUSURFACE_HPP