/*
 ** Copyright 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 ANDROID_GLES2_DBG_HEADER_H
#define ANDROID_GLES2_DBG_HEADER_H

#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>

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

#include <cutils/log.h>
#include <utils/Timers.h>

#include "hooks.h"

#include "glesv2dbg.h"

#define GL_ENTRY(_r, _api, ...) _r Debug_##_api ( __VA_ARGS__ );
#include "glesv2dbg_functions.h"

#include "debugger_message.pb.h"

using namespace android;
using namespace com::android;

#ifndef __location__
#define __HIERALLOC_STRING_0__(s)   #s
#define __HIERALLOC_STRING_1__(s)   __HIERALLOC_STRING_0__(s)
#define __HIERALLOC_STRING_2__      __HIERALLOC_STRING_1__(__LINE__)
#define __location__                __FILE__ ":" __HIERALLOC_STRING_2__
#endif

#undef assert
#define assert(expr) if (!(expr)) { LOGD("\n*\n*\n* assert: %s at %s \n*\n*", #expr, __location__); int * x = 0; *x = 5; }
//#undef LOGD
//#define LOGD(...)

namespace android
{

struct GLFunctionBitfield {
    unsigned char field [24]; // 8 * 24 = 192

    void Bit(const glesv2debugger::Message_Function function, bool bit) {
        const unsigned byte = function / 8, mask = 1 << (function % 8);
        if (bit)
            field[byte] |= mask;
        else
            field[byte] &= ~mask;
    }

    bool Bit(const glesv2debugger::Message_Function function) const {
        const unsigned byte = function / 8, mask = 1 << (function % 8);
        return field[byte] & mask;
    }
};

struct DbgContext {
    static const unsigned int LZF_CHUNK_SIZE = 256 * 1024;

private:
    char * lzf_buf; // malloc / free; for lzf chunk compression and other uses

    // used as buffer and reference frame for ReadPixels; malloc/free
    unsigned * lzf_ref [2];
    unsigned lzf_readIndex; // 0 or 1
    unsigned lzf_refSize, lzf_refBufSize; // bytes

public:
    const unsigned int version; // 0 is GLES1, 1 is GLES2
    const gl_hooks_t * const hooks;
    const unsigned int MAX_VERTEX_ATTRIBS;
    const unsigned int readBytesPerPixel;

    unsigned int captureSwap; // number of eglSwapBuffers to glReadPixels
    unsigned int captureDraw; // number of glDrawArrays/Elements to glReadPixels

    GLFunctionBitfield expectResponse;

    struct VertexAttrib {
        GLenum type; // element data type
        unsigned size; // number of data per element
        unsigned stride; // calculated number of bytes between elements
        const void * ptr;
        unsigned elemSize; // calculated number of bytes per element
        GLuint buffer; // buffer name
        GLboolean normalized : 1;
        GLboolean enabled : 1;
        VertexAttrib() : type(0), size(0), stride(0), ptr(NULL), elemSize(0),
                buffer(0), normalized(0), enabled(0) {}
    } * vertexAttribs;
    bool hasNonVBOAttribs; // whether any enabled vertexAttrib is user pointer

    struct VBO {
        const GLuint name;
        const GLenum target;
        VBO * next;
        void * data; // malloc/free
        unsigned size; // in bytes
        VBO(const GLuint name, const GLenum target, VBO * head) : name(name),
                target(target), next(head), data(NULL), size(0) {}
    } * indexBuffers; // linked list of all index buffers
    VBO * indexBuffer; // currently bound index buffer

    GLuint program;
    unsigned maxAttrib; // number of slots used by program

    DbgContext(const unsigned version, const gl_hooks_t * const hooks,
               const unsigned MAX_VERTEX_ATTRIBS);
    ~DbgContext();

    void Fetch(const unsigned index, std::string * const data) const;
    void Compress(const void * in_data, unsigned in_len, std::string * const outStr);
    static unsigned char * Decompress(const void * in, const unsigned int inLen,
                                      unsigned int * const outLen); // malloc/free
    void * GetReadPixelsBuffer(const unsigned size);
    bool IsReadPixelBuffer(const void * const ptr)  {
        return ptr == lzf_ref[lzf_readIndex];
    }
    void CompressReadPixelBuffer(std::string * const outStr);
    char * GetBuffer(); // allocates lzf_buf if NULL
    unsigned int GetBufferSize(); // allocates lzf_buf if NULL

    void glUseProgram(GLuint program);
    void glEnableVertexAttribArray(GLuint index);
    void glDisableVertexAttribArray(GLuint index);
    void glVertexAttribPointer(GLuint indx, GLint size, GLenum type,
                               GLboolean normalized, GLsizei stride, const GLvoid* ptr);
    void glBindBuffer(GLenum target, GLuint buffer);
    void glBufferData(GLenum target, GLsizeiptr size, const GLvoid* data, GLenum usage);
    void glBufferSubData(GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid* data);
    void glDeleteBuffers(GLsizei n, const GLuint *buffers);
};

DbgContext * getDbgContextThreadSpecific();

struct FunctionCall {
    virtual const int * operator()(gl_hooks_t::gl_t const * const _c,
                                   glesv2debugger::Message & msg) = 0;
    virtual ~FunctionCall() {}
};

// move these into DbgContext as static
extern int timeMode; // SYSTEM_TIME_

extern int clientSock, serverSock;

unsigned GetBytesPerPixel(const GLenum format, const GLenum type);

// every Debug_gl* function calls this to send message to client and possibly receive commands
int * MessageLoop(FunctionCall & functionCall, glesv2debugger::Message & msg,
                  const glesv2debugger::Message_Function function);

void Receive(glesv2debugger::Message & cmd);
float Send(const glesv2debugger::Message & msg, glesv2debugger::Message & cmd);
void SetProp(DbgContext * const dbg, const glesv2debugger::Message & cmd);
const int * GenerateCall(DbgContext * const dbg, const glesv2debugger::Message & cmd,
                         glesv2debugger::Message & msg, const int * const prevRet);
}; // namespace android {

#endif // #ifndef ANDROID_GLES2_DBG_HEADER_H
