/*
* Copyright (C) 2011 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.
*/
#ifndef _SYSTEM_EGL_DISPLAY_H
#define _SYSTEM_EGL_DISPLAY_H

#include <assert.h>
#include <pthread.h>
#include "glUtils.h"
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include "EGLClientIface.h"
#include "GLClientState.h"

#if __cplusplus >= 201103L
#include <unordered_set>
#else
#include <hash_set>
#endif

#include <map>

#define ATTRIBUTE_NONE (-1)
//FIXME: are we in this namespace?
using namespace android;

class eglDisplay
{
public:
    eglDisplay();
    ~eglDisplay();

    bool initialize(EGLClient_eglInterface *eglIface);
    void terminate();

    int getVersionMajor() const { return m_major; }
    int getVersionMinor() const { return m_minor; }
    bool initialized() const { return m_initialized; }

    const char *queryString(EGLint name);

    const EGLClient_glesInterface *gles_iface() const { return m_gles_iface; }
    const EGLClient_glesInterface *gles2_iface() const { return m_gles2_iface; }

    int     getNumConfigs(){ return m_numConfigs; }

    EGLConfig getConfigAtIndex(uint32_t index) const;
    uint32_t getIndexOfConfig(EGLConfig config) const;
    bool isValidConfig(EGLConfig cfg) const;

    EGLBoolean  getConfigAttrib(EGLConfig config, EGLint attrib, EGLint * value);
    EGLBoolean  setConfigAttrib(EGLConfig config, EGLint attrib, EGLint value);
    EGLBoolean getConfigGLPixelFormat(EGLConfig config, GLenum * format);
    EGLBoolean getConfigNativePixelFormat(EGLConfig config, uint32_t * format);

    void     dumpConfig(EGLConfig config);

    void onCreateContext(EGLContext ctx);
    void onCreateSurface(EGLSurface surface);

    void onDestroyContext(EGLContext ctx);
    void onDestroySurface(EGLSurface surface);

    bool isContext(EGLContext ctx);
    bool isSurface(EGLSurface ctx);

    // Needs a current context (put this near eglMakeCurrent)
    HostDriverCaps getHostDriverCaps(int majorVersion, int minorVersion);

private:
    EGLClient_glesInterface *loadGLESClientAPI(const char *libName,
                                               EGLClient_eglInterface *eglIface,
                                               void **libHandle);
    EGLBoolean getAttribValue(EGLConfig config, EGLint attribIdxi, EGLint * value);
    EGLBoolean setAttribValue(EGLConfig config, EGLint attribIdxi, EGLint value);
    void     processConfigs();

private:
    pthread_mutex_t m_lock;
    bool m_initialized;
    int  m_major;
    int  m_minor;
    int  m_hostRendererVersion;
    int  m_numConfigs;
    int  m_numConfigAttribs;

    /* This is the mapping between an attribute name to it's index in any given config */
    std::map<EGLint, EGLint>    m_attribs;
    /* This is an array of all config's attributes values stored in the following sequencial fasion (read: v[c,a] = the value of attribute <a> of config <c>)
     * v[0,0],..,v[0,m_numConfigAttribs-1],
     *...
     * v[m_numConfigs-1,0],..,v[m_numConfigs-1,m_numConfigAttribs-1]
     */
    EGLint *m_configs;
    EGLClient_glesInterface *m_gles_iface;
    EGLClient_glesInterface *m_gles2_iface;
    char *m_versionString;
    char *m_vendorString;
    char *m_extensionString;

#if __cplusplus >= 201103L
    typedef std::unordered_set<EGLContext> EGLContextSet;
    typedef std::unordered_set<EGLSurface> EGLSurfaceSet;
#else
    typedef std::hash_set<EGLContext> EGLContextSet;
    typedef std::hash_set<EGLSurface> EGLSurfaceSet;
#endif
    EGLContextSet m_contexts;
    EGLSurfaceSet m_surfaces;
    pthread_mutex_t m_ctxLock;
    pthread_mutex_t m_surfaceLock;

    int m_hostDriverCaps_knownMajorVersion;
    int m_hostDriverCaps_knownMinorVersion;
    HostDriverCaps m_hostDriverCaps;
};

#endif