/*
 * Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.

 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   * Neither the name of Code Aurora Forum, Inc. nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef INCLUDE_LIBQCOM_UI
#define INCLUDE_LIBQCOM_UI

#include <cutils/native_handle.h>
#include <ui/GraphicBuffer.h>
#include <hardware/hwcomposer.h>
#include <ui/Region.h>
#include <EGL/egl.h>
#include <utils/Singleton.h>

using namespace android;
using android::sp;
using android::GraphicBuffer;

#define HWC_BYPASS_INDEX_MASK 0x00000030

/*
 * Qcom specific Native Window perform operations
 */
enum {
    NATIVE_WINDOW_SET_BUFFERS_SIZE        = 0x10000000,
    NATIVE_WINDOW_UPDATE_BUFFERS_GEOMETRY = 0x20000000,
    NATIVE_WINDOW_SET_S3D_FORMAT          = 0x40000000,
};

// Enum containing the supported composition types
enum {
    COMPOSITION_TYPE_GPU = 0,
    COMPOSITION_TYPE_MDP = 0x1,
    COMPOSITION_TYPE_C2D = 0x2,
    COMPOSITION_TYPE_CPU = 0x4,
    COMPOSITION_TYPE_DYN = 0x8
};

/*
 * Layer Attributes
 */
enum eLayerAttrib {
    LAYER_UPDATE_STATUS,
};

/*
 * Layer Flags
 */
enum {
    LAYER_UPDATING = 1<<0,
};

/*
 * Flags set by the layer and sent to HWC
 */
enum {
    HWC_LAYER_NOT_UPDATING      = 0x00000002,
    HWC_USE_ORIGINAL_RESOLUTION = 0x10000000,
    HWC_DO_NOT_USE_OVERLAY      = 0x20000000,
    HWC_COMP_BYPASS             = 0x40000000,
    HWC_BYPASS_RESERVE_0        = 0x00000010,
    HWC_BYPASS_RESERVE_1        = 0x00000020,
};

enum HWCCompositionType {
    HWC_USE_GPU = HWC_FRAMEBUFFER, // This layer is to be handled by Surfaceflinger
    HWC_USE_OVERLAY = HWC_OVERLAY, // This layer is to be handled by the overlay
    HWC_USE_COPYBIT                // This layer is to be handled by copybit
};

enum external_display {
    EXT_DISPLAY_OFF,
    EXT_DISPLAY_HDMI,
    EXT_DISPLAY_WIFI
};

/*
 * Structure to hold the buffer geometry
 */
struct qBufGeometry {
    int width;
    int height;
    int format;
    void set(int w, int h, int f) {
       width = w;
       height = h;
       format = f;
    }
};

#ifndef DEBUG_CALC_FPS
#define CALC_FPS() ((void)0)
#define CALC_INIT() ((void)0)
#else
#define CALC_FPS() CalcFps::getInstance().Fps()
#define CALC_INIT() CalcFps::getInstance().Init()

class CalcFps : public Singleton<CalcFps> {
public:
    CalcFps();
    ~CalcFps();

    void Init();
    void Fps();

private:
    static const unsigned int MAX_FPS_CALC_PERIOD_IN_FRAMES = 128;
    static const unsigned int MAX_FRAMEARRIVAL_STEPS = 50;
    static const unsigned int MAX_DEBUG_FPS_LEVEL = 2;

    struct debug_fps_metadata_t {
        /*fps calculation based on time or number of frames*/
        enum DfmType {
          DFM_FRAMES = 0,
          DFM_TIME   = 1,
        };

        DfmType type;

        /* indicates how much time do we wait till we calculate FPS */
        unsigned long time_period;

        /*indicates how much time elapsed since we report fps*/
        float time_elapsed;

        /* indicates how many frames do we wait till we calculate FPS */
        unsigned int period;
        /* current frame, will go upto period, and then reset */
        unsigned int curr_frame;
        /* frame will arrive at a multiple of 16666 us at the display.
           This indicates how many steps to consider for our calculations.
           For example, if framearrival_steps = 10, then the frame that arrived
           after 166660 us or more will be ignored.
        */
        unsigned int framearrival_steps;
        /* ignorethresh_us = framearrival_steps * 16666 */
        nsecs_t      ignorethresh_us;
        /* used to calculate the actual frame arrival step, the times might not be
           accurate
        */
        unsigned int margin_us;

        /* actual data storage */
        nsecs_t      framearrivals[MAX_FPS_CALC_PERIOD_IN_FRAMES];
        nsecs_t      accum_framearrivals[MAX_FRAMEARRIVAL_STEPS];
    };

private:
    void populate_debug_fps_metadata(void);
    void print_fps(float fps);
    void calc_fps(nsecs_t currtime_us);

private:
    debug_fps_metadata_t debug_fps_metadata;
    unsigned int debug_fps_level;
};
#endif

class QCBaseLayer
{
//    int mS3DFormat;
    int32_t mComposeS3DFormat;
public:
    QCBaseLayer()
    {
        mComposeS3DFormat = 0;
    }
    enum { // S3D formats
        eS3D_SIDE_BY_SIDE   = 0x10000,
        eS3D_TOP_BOTTOM     = 0x20000
    };
/*
    virtual status_t setStereoscopic3DFormat(int format) { mS3DFormat = format; return 0; }
    virtual int getStereoscopic3DFormat() const { return mS3DFormat; }
 */
    void setS3DComposeFormat (int32_t hints)
    {
        if (hints & HWC_HINT_DRAW_S3D_SIDE_BY_SIDE)
            mComposeS3DFormat = eS3D_SIDE_BY_SIDE;
        else if (hints & HWC_HINT_DRAW_S3D_TOP_BOTTOM)
            mComposeS3DFormat = eS3D_TOP_BOTTOM;
        else
            mComposeS3DFormat = 0;
    }
    int32_t needsS3DCompose () const { return mComposeS3DFormat; }
};

/*
 * Function to check if the allocated buffer is of the correct size.
 * Reallocate the buffer with the correct size, if the size doesn't
 * match
 *
 * @param: handle of the allocated buffer
 * @param: requested size for the buffer
 * @param: usage flags
 *
 * return 0 on success
 */
int checkBuffer(native_handle_t *buffer_handle, int size, int usage);

/*
 * Checks if the format is supported by the GPU.
 *
 * @param: format to check
 *
 * @return true if the format is supported by the GPU.
 */
bool isGPUSupportedFormat(int format);

/*
 * Checks if the format is natively supported by the GPU.
 * For now, we use this function to check only if CHECK_FOR_EXTERNAL_FORMAT
 * is set.
 *
 * @param: format to check
 *
 * @return true if the format is supported by the GPU.
 */
bool isGPUSupportedFormatInHW(int format);

/*
 * Adreno is not optimized for GL_TEXTURE_EXTERNAL_OES
 * texure target. DO NOT choose TEXTURE_EXTERNAL_OES
 * target for RGB formats.
 *
 * Based on the pixel format, decide the texture target.
 *
 * @param : pixel format to check
 *
 * @return : GL_TEXTURE_2D for RGB formats, and
 *           GL_TEXTURE_EXTERNAL_OES for YUV formats.
 *
*/

int decideTextureTarget (const int pixel_format);

/*
 * Gets the number of arguments required for this operation.
 *
 * @param: operation whose argument count is required.
 *
 * @return -EINVAL if the operation is invalid.
 */
int getNumberOfArgsForOperation(int operation);

/*
 * Checks if memory needs to be reallocated for this buffer.
 *
 * @param: Geometry of the current buffer.
 * @param: Required Geometry.
 * @param: Geometry of the updated buffer.
 *
 * @return True if a memory reallocation is required.
 */
bool needNewBuffer(const qBufGeometry currentGeometry,
                            const qBufGeometry requiredGeometry,
                            const qBufGeometry updatedGeometry);

/*
 * Update the geometry of this buffer without reallocation.
 *
 * @param: buffer whose geometry needs to be updated.
 * @param: Updated buffer geometry
 */
int updateBufferGeometry(sp<GraphicBuffer> buffer, const qBufGeometry bufGeometry);

/*
 * Update the S3D format of this buffer.
 *
 * @param: buffer whosei S3D format needs to be updated.
 * @param: Updated buffer S3D format
 */
int updateBufferS3DFormat(sp<GraphicBuffer> buffer, const int s3dFormat);

/*
 * Updates the flags for the layer
 *
 * @param: Attribute
 * @param: Identifies if the attribute was enabled or disabled.
 * @param: current Layer flags.
 *
 * @return: Flags for the layer
 */
int updateLayerQcomFlags(eLayerAttrib attribute, bool enable, int& currentFlags);

/*
 * Gets the per frame HWC flags for this layer.
 *
 * @param: current hwcl flags
 * @param: current layerFlags
 *
 * @return: the per frame flags.
 */
int getPerFrameFlags(int hwclFlags, int layerFlags);

/*
 * Checks if FB is updated by this composition type
 *
 * @param: composition type
 * @return: true if FB is updated, false if not
 */

bool isUpdatingFB(HWCCompositionType compositionType);

/*
 * Get the current composition Type
 *
 * @return the compositon Type
 */
int getCompositionType();

/*
 * Clear region implementation for C2D/MDP versions.
 *
 * @param: region to be cleared
 * @param: EGL Display
 * @param: EGL Surface
 *
 * @return 0 on success
 */
int qcomuiClearRegion(Region region, EGLDisplay dpy, EGLSurface sur);

/*
 * Handles the externalDisplay event
 * HDMI has highest priority compared to WifiDisplay
 * Based on the current and the new display event, decides the
 * external display to be enabled
 *
 * @param: newEvent - new external event
 * @param: currEvent - currently enabled external event
 * @return: external display to be enabled
 *
 */
external_display handleEventHDMI(external_display newEvent, external_display
                                                                   currEvent);
#endif // INCLUDE_LIBQCOM_UI