/*
* 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 _GL_ENCODER_H_
#define _GL_ENCODER_H_

#include "gl_enc.h"
#include "GLClientState.h"
#include "FixedBuffer.h"

class GLEncoder : public gl_encoder_context_t {

public:
    GLEncoder(IOStream *stream);
    virtual ~GLEncoder();
    void setClientState(GLClientState *state) {
        m_state = state;
    }
    void flush() { m_stream->flush(); }
    size_t pixelDataSize(GLsizei width, GLsizei height, GLenum format, GLenum type, int pack);
private:

    GLClientState *m_state;
    FixedBuffer m_fixedBuffer;
    GLint *m_compressedTextureFormats;
    GLint m_num_compressedTextureFormats;

    GLint *getCompressedTextureFormats();
    // original functions;
    glGetIntegerv_client_proc_t m_glGetIntegerv_enc;
    glGetFloatv_client_proc_t m_glGetFloatv_enc;
    glGetFixedv_client_proc_t m_glGetFixedv_enc;
    glGetBooleanv_client_proc_t m_glGetBooleanv_enc;

    glPixelStorei_client_proc_t m_glPixelStorei_enc;
    glVertexPointer_client_proc_t m_glVertexPointer_enc;
    glNormalPointer_client_proc_t m_glNormalPointer_enc;
    glColorPointer_client_proc_t m_glColorPointer_enc;
    glPointSizePointerOES_client_proc_t m_glPointSizePointerOES_enc;
    glTexCoordPointer_client_proc_t m_glTexCoordPointer_enc;
    glClientActiveTexture_client_proc_t m_glClientActiveTexture_enc;

    glBindBuffer_client_proc_t m_glBindBuffer_enc;
    glEnableClientState_client_proc_t m_glEnableClientState_enc;
    glDisableClientState_client_proc_t m_glDisableClientState_enc;
    glDrawArrays_client_proc_t m_glDrawArrays_enc;
    glDrawElements_client_proc_t m_glDrawElements_enc;
    glFlush_client_proc_t m_glFlush_enc;

    // statics
    static void s_glGetIntegerv(void *self, GLenum pname, GLint *ptr);
    static void s_glGetBooleanv(void *self, GLenum pname, GLboolean *ptr);
    static void s_glGetFloatv(void *self, GLenum pname, GLfloat *ptr);
    static void s_glGetFixedv(void *self, GLenum pname, GLfixed *ptr);

    static void s_glFlush(void * self);
    static GLubyte * s_glGetString(void *self, GLenum name);
    static void s_glVertexPointer(void *self, int size, GLenum type, GLsizei stride, void *data);
    static void s_glNormalPointer(void *self, GLenum type, GLsizei stride, void *data);
    static void s_glColorPointer(void *self, int size, GLenum type, GLsizei stride, void *data);
    static void s_glPointsizePointer(void *self, GLenum type, GLsizei stride, void *data);
    static void s_glClientActiveTexture(void *self, GLenum texture);
    static void s_glTexcoordPointer(void *self, int size, GLenum type, GLsizei stride, void *data);
    static void s_glDisableClientState(void *self, GLenum state);
    static void s_glEnableClientState(void *self, GLenum state);
    static void s_glBindBuffer(void *self, GLenum target, GLuint id);
    static void s_glDrawArrays(void *self, GLenum mode, GLint first, GLsizei count);
    static void s_glDrawElements(void *self, GLenum mode, GLsizei count, GLenum type, void *indices);
    static void s_glPixelStorei(void *self, GLenum param, GLint value);
    void sendVertexData(unsigned first, unsigned count);

    template <class T> void minmax(T *indices, int count, int *min, int *max) {
        *min = -1;
        *max = -1;
        T *ptr = indices;
        for (int i = 0; i < count; i++) {
            if (*min == -1 || *ptr < *min) *min = *ptr;
            if (*max == -1 || *ptr > *max) *max = *ptr;
            ptr++;
        }
    }

    template <class T> void shiftIndices(T *indices, int count,  int offset) {
        T *ptr = indices;
        for (int i = 0; i < count; i++) {
            *ptr += offset;
            ptr++;
        }
    }


    template <class T> void shiftIndices(T *src, T *dst, int count, int offset)
    {
        for (int i = 0; i < count; i++) {
            *dst = *src + offset;
            dst++;
            src++;
        }
    }

};
#endif