Subversion Repositories tpanel

/*

 * Copyright (C) 2023 by Andreas Theofilu <andreas@theosys.at>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA

 */

#include <cstring>

#include "tbitmap.h"

#include "terror.h"

TBitmap::TBitmap()

{

    DECL_TRACER("TBitmap::TBitmap()");

}

TBitmap::TBitmap(const unsigned char* data, size_t size)

{

    DECL_TRACER("TBitmap::TBitmap(unsigned char* data, size_t size)");

    if (!data || !size)

        return;

    mData = new unsigned char[size];

    memmove(mData, data, size);

    mSize = size;

}

TBitmap::TBitmap(const unsigned char* data, int width, int height, int pixsize)

{

    DECL_TRACER("TBitmap::TBitmap(const unsigned char* data, int width, int height, int pixsize)");

    if (!data || width <= 0 || height <= 0 || pixsize < 1)

        return;

    mSize = ((size_t)width * (size_t)pixsize) * (size_t)height;

    mData = new unsigned char[mSize];

    memmove(mData, data, mSize);

    mPixelSize = pixsize;

    mPixline = width * pixsize;

    mWidth = width;

    mHeight = height;

}

TBitmap::TBitmap(const TBitmap& bm)

{

    DECL_TRACER("TBitmap::TBitmap(const TBitmap& bm)");

    if (bm.mSize > 0)

    {

        mData = new unsigned char[bm.mSize];

        memmove(mData, bm.mData, bm.mSize);

        mSize = bm.mSize;

    }

    mPixline = bm.mPixline;

    mPixelSize = bm.mPixelSize;

    mWidth = bm.mWidth;

    mHeight = bm.mHeight;

}

TBitmap::~TBitmap()

{

    DECL_TRACER("TBitmap::~TBitmap()");

    if (mData)

        delete[] mData;

    mData = nullptr;

    mSize = 0;

}

void TBitmap::setPixline(int pl)

{

    DECL_TRACER("TBitmap::setPixline(int pl)");

    if (pl < 1 || pl < mPixelSize)

        return;

    int width = pl / mPixelSize;

    int height = static_cast<int>(mSize) / pl;

    if ((size_t)(height * pl) > mSize)

    {

        MSG_ERROR("TBitmap::setPixline: Number of pixels exceeds the allocated size of image!");

        return;

    }

    mPixline = pl;

    mWidth = width;

    mHeight = height;

}

void TBitmap::setBitmap(const unsigned char* data, size_t size)

{

    DECL_TRACER("TBitmap::setBitmap(unsigned char* data, size_t size)");

    clear();

    if (!data || !size)

        return;

    mData = new unsigned char [size];

    memmove(mData, data, size);

    mSize = size;

}

void TBitmap::setBitmap(const unsigned char* data, int width, int height, int pixsize)

{

    DECL_TRACER("TBitmap::setBitmap(const unsigned char* data, int width, int height, int pixsize)");

    clear();

    if (!data || width <= 0 || height <= 0 || pixsize < 1)

        return;

    mSize = ((size_t)width * (size_t)pixsize) * (size_t)height;

    mData = new unsigned char[mSize];

    memmove(mData, data, mSize);

    mPixelSize = pixsize;

    mPixline = width * pixsize;

    mWidth = width;

    mHeight = height;

}

unsigned char *TBitmap::getBitmap(size_t* size)

{

    DECL_TRACER("TBitmap::getBitmap(size_t* size)");

    if (size)

        *size = mSize;

    return mData;

}

void TBitmap::setWidth(int w)

{

    DECL_TRACER("TBitmap::setWidth(int w)");

    if (w < 1)

        return;

    if ((size_t)(w * mPixelSize * mHeight) > mSize)

    {

        MSG_ERROR("New width would exceed allocated image size!");

        return;

    }

    mPixline = w * mPixelSize;

    mWidth = w;

    mHeight = static_cast<int>(mSize) / mPixline;

}

void TBitmap::setHeight(int h)

{

    DECL_TRACER("TBitmap::setHeight(int h)");

    if (h < 1)

        return;

    if ((mSize / mPixline) < (size_t)h)

    {

        MSG_ERROR("New height would exceed allocated image size!");

        return;

    }

    mHeight = h;

}

void TBitmap::setSize(int w, int h)

{

    DECL_TRACER("TBitmap::setSize(int w, int h)");

    if (w < 1 || h < 1)

        return;

    int pixline = w * mPixelSize;

    int maxHeight = static_cast<int>(mSize) / pixline;

    if (h > maxHeight || (size_t)(pixline * h) > mSize)

    {

        MSG_ERROR("Width and height exceeds allocated image size!");

        return;

    }

    mPixline = pixline;

    mWidth = w;

    mHeight = h;

}

void TBitmap::setPixelSize(int ps)

{

    DECL_TRACER("TBitmap::setPixelSize(int ps)");

    if (ps < 1)

        return;

    int pixline = mWidth * ps;

    if ((size_t)pixline > mSize)

    {

        MSG_ERROR("New pixel size would exceed allocated image size!");

        return;

    }

    mPixelSize = ps;

    mPixline = pixline;

    mHeight = static_cast<int>(mSize) / pixline;

}

bool TBitmap::isValid()

{

    DECL_TRACER("TBitmap::isValid()");

    if (!mData)         // If there is no data, the content is invalid.

        return false;

    // Here we make sure the stored values are totaly valid.

    // First we check that there is potential content.

    if (mSize > 0 && mPixline > 0 && mPixelSize > 0)    // Content?

    {                                                   // Yes, then validate it ...

        int pxl = mWidth * mPixelSize;                  // Calculate the pixels per line

        size_t s = (size_t)(pxl * mHeight);             // Calculate the minimum size of buffer

        if (pxl == mPixline && s <= mSize)              // Compare the pixels per line and the allocated buffer size

            return true;                                // Everything is plausible.

    }

    return false;                                       // Some values failed!

}

void TBitmap::clear()

{

    DECL_TRACER("TBitmap::clear()");

    if (mData)

    {

        delete[] mData;

        mData = nullptr;

    }

    mSize = 0;

    mPixline = mWidth = mHeight = 0;

    mPixelSize = 4;

}