Subversion Repositories tpanel

/*

 * Copyright (C) 2021 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 <include/core/SkBitmap.h>

#include "tdrawimage.h"

#include "tbutton.h"

#include "terror.h"

#include <qglobal.h>

extern bool prg_stopped;

using std::string;

using std::vector;

TDrawImage::TDrawImage()

{

    DECL_TRACER("TDrawImage::TDrawImage()");

}

TDrawImage::~TDrawImage()

{

    DECL_TRACER("TDrawImage::~TDrawImage()");

}

bool TDrawImage::drawImage(SkBitmap* bm)

{

    DECL_TRACER("TDrawImage::drawImage(SkBitmap* bm)");

    if (prg_stopped)

        return false;

    if (mSr.size() == 0)

    {

        MSG_ERROR("No SR information!");

        return false;

    }

    int instance = mInstance;

    if (mInstance < 0)

        instance = 0;

    else if ((size_t)mInstance >= mSr.size())

        instance = mSr.size() - 1;

    if (mSr[instance].dynamic)

    {

        MSG_WARNING("Dynamic images are not handled by TDrawImage!");

        return false;

    }

    if (!imageMi.empty() && !mSr[instance].mi.empty() && mSr[instance].bs.empty())       // Chameleon image?

    {

        MSG_TRACE("Chameleon image ...");

        SkBitmap imgRed(imageMi);

        SkBitmap imgMask;

        if (!imageBm.empty() && !mSr[instance].bm.empty())

            imgMask.installPixels(imageBm.pixmap());

        else

        {

            imgMask.allocN32Pixels(mSr[instance].mi_width, mSr[instance].mi_height);

            imgMask.eraseColor(SK_ColorTRANSPARENT);

        }

        SkBitmap img = drawImageButton(imgRed, imgMask, mSr[instance].mi_width, mSr[instance].mi_height, TColor::getSkiaColor(mSr[instance].cf), TColor::getSkiaColor(mSr[instance].cb));

        if (img.empty())

        {

            MSG_ERROR("Error creating the cameleon image \"" << mSr[instance].mi << "\" / \"" << mSr[instance].bm << "\"!");

            TError::setError();

            return false;

        }

        SkCanvas ctx(img, SkSurfaceProps(1, kUnknown_SkPixelGeometry));

        SkImageInfo info = img.info();

        SkPaint paint;

        paint.setBlendMode(SkBlendMode::kSrcOver);

        ctx.drawBitmap(imgMask, 0, 0, &paint);

        Button::POSITION_t position = calcImagePosition(mSr[instance].mi_width, mSr[instance].mi_height, instance);

        if (!position.valid)

        {

            MSG_ERROR("Error calculating the position of the image!");

            TError::setError();

            return false;

        }

        SkCanvas can(*bm, SkSurfaceProps(1, kUnknown_SkPixelGeometry));

        paint.setBlendMode(SkBlendMode::kSrc);

        if (mSr[instance].sb == 0)

            can.drawBitmap(img, position.left, position.top, &paint);

        else    // Scale to fit

        {

            SkRect rect = SkRect::MakeXYWH(position.left, position.top, position.width, position.height);

            sk_sp<SkImage> im = SkImage::MakeFromBitmap(img);

            can.drawImageRect(im, rect, &paint);

        }

    }

    else if (!imageBm.empty() && !mSr[instance].bm.empty())

    {

        MSG_TRACE("Drawing normal image ...");

        SkBitmap image = imageBm;

        if (image.empty())

        {

            MSG_ERROR("Error creating the image \"" << mSr[instance].bm << "\"!");

            TError::setError();

            return false;

        }

        Button::POSITION_t position = calcImagePosition(mSr[instance].bm_width, mSr[instance].bm_height, instance);

        if (!position.valid)

        {

            MSG_ERROR("Error calculating the position of the image.");

            TError::setError();

            return false;

        }

        MSG_DEBUG("Putting bitmap on top of image ...");

        SkPaint paint;

        paint.setBlendMode(SkBlendMode::kSrcOver);

        SkCanvas can(*bm, SkSurfaceProps(1, kUnknown_SkPixelGeometry));

        if (mSr[instance].sb == 0)

        {

            if ((mSr[instance].jb == 0 && mSr[instance].bx >= 0 && mSr[instance].by >= 0) || mSr[instance].jb != 0)  // Draw the full image

            {

                MSG_DEBUG("Drawing full image ...");

                can.drawBitmap(image, position.left, position.top, &paint);

            }

            else    // We need only a subset of the image

            {

                MSG_DEBUG("Create a subset of an image ...");

                // Create a new Info to have the size of the subset.

                SkImageInfo info = SkImageInfo::Make(position.width, position.height, kRGBA_8888_SkColorType, kPremul_SkAlphaType);

                size_t byteSize = info.computeMinByteSize();

                if (byteSize == 0)

                {

                    MSG_ERROR("Unable to calculate size of image!");

                    TError::setError();

                    return false;

                }

                MSG_DEBUG("Rectangle of part: x: " << position.left << ", y: " << position.top << ", w: " << position.width << ", h: " << position.height);

                SkBitmap part;      // Bitmap receiving the wanted part from the whole image

                SkIRect irect = SkIRect::MakeXYWH(position.left, position.top, position.width, position.height);

                image.extractSubset(&part, irect);  // Extract the part of the image containg the pixels we want

                can.drawBitmap(part, 0, 0, &paint); // Draw the image

            }

        }

        else    // Scale to fit

        {

            MSG_DEBUG("Scaling image to fit.");

            SkRect rect = SkRect::MakeXYWH(position.left, position.top, position.width, position.height);

            sk_sp<SkImage> im = SkImage::MakeFromBitmap(image);

            can.drawImageRect(im, rect, &paint);

        }

    }

    else if ((imageBm.empty() && !mSr[0].bm.empty()) || (imageMi.empty() && !mSr[0].mi.empty()))

    {

        if (imageBm.empty())

        {

            MSG_ERROR("Image BM " << mSr[0].bm << " defined but got no image!");

        }

        if (imageMi.empty())

        {

            MSG_ERROR("Image MI " << mSr[0].mi << " defined but got no image!");

        }

        return false;

    }

    else

    {

        MSG_DEBUG("No bitmap defined.");

    }

    return true;

}

SkBitmap TDrawImage::drawImageButton(SkBitmap& imgRed, SkBitmap& imgMask, int width, int height, SkColor col1, SkColor col2)

{

    DECL_TRACER("TDrawImage::drawImageButton(SkImage& imgRed, SkImage& imgMask, int width, int height, SkColor col1, SkColor col2)");

    if (width <= 0 || height <= 0)

    {

        MSG_WARNING("Got invalid width of height! (width: " << width << ", height: " << height);

        return SkBitmap();

    }

    SkPixmap pixmapRed = imgRed.pixmap();

    SkPixmap pixmapMask;

    if (!imgMask.empty())

        pixmapMask = imgMask.pixmap();

    SkImageInfo maskPixInfo = SkImageInfo::MakeN32Premul(width, height);

    maskPixInfo.makeColorType(kRGBA_8888_SkColorType);

    SkBitmap maskBm;

    maskBm.allocPixels(SkImageInfo::MakeN32Premul(width, height));

    for (int ix = 0; ix < width; ix++)

    {

        for (int iy = 0; iy < height; iy++)

        {

            SkColor pixelRed = pixmapRed.getColor(ix, iy);

            SkColor pixelMask;

            if (!imgMask.empty())

                pixelMask = pixmapMask.getColor(ix, iy);

            else

                pixelMask = SK_ColorWHITE;

            SkColor pixel = baseColor(pixelRed, pixelMask, col1, col2);

            uint32_t alpha = SkColorGetA(pixel);

            uint32_t *wpix = maskBm.getAddr32(ix, iy);

            if (!wpix)

            {

                MSG_ERROR("No pixel buffer!");

                break;

            }

            if (alpha == 0)

                pixel = pixelMask;

            // Skia has a bug and has changed the red and the blue color

            // channel. Therefor we must change this 2 color channels for

            // Linux based OSs here. On Android this is not necessary.

#ifdef __ANDROID__

            *wpix = pixel;

#else   // We've to invert the pixels here to have the correct colors

            uchar red   = SkColorGetR(pixel);   // This is blue in reality

            uchar green = SkColorGetG(pixel);

            uchar blue  = SkColorGetB(pixel);   // This is red in reality

            uchar al    = SkColorGetA(pixel);

            *wpix = SkColorSetARGB(al, blue, green, red);

#endif

        }

    }

    return maskBm;

}

SkColor TDrawImage::baseColor(SkColor basePix, SkColor maskPix, SkColor col1, SkColor col2)

{

    uint alpha = SkColorGetA(basePix);

    uint green = SkColorGetG(basePix);

#ifndef __ANDROID__

    uint red = SkColorGetR(basePix);

#else

    uint red = SkColorGetB(basePix);

#endif

    if (alpha == 0)

        return maskPix;

    if (red && green)

    {

#ifdef __ANDROID__

        uint newB = (SkColorGetR(col1) + SkColorGetR(col2) / 2) & 0x0ff;

        uint newG = (SkColorGetG(col1) + SkColorGetG(col2) / 2) & 0x0ff;

        uint newR = (SkColorGetB(col1) + SkColorGetB(col2) / 2) & 0x0ff;

#else

        uint newR = (SkColorGetR(col1) + SkColorGetR(col2) / 2) & 0x0ff;

        uint newG = (SkColorGetG(col1) + SkColorGetG(col2) / 2) & 0x0ff;

        uint newB = (SkColorGetB(col1) + SkColorGetB(col2) / 2) & 0x0ff;

#endif

        uint newA = (SkColorGetA(col1) + SkColorGetA(col2) / 2) & 0x0ff;

        return SkColorSetARGB(newA, newR, newG, newB);

    }

    if (red)

        return col1;

    if (green)

        return col2;

    return SK_ColorTRANSPARENT; // transparent pixel

}

Button::POSITION_t TDrawImage::calcImagePosition(int width, int height, int number)

{

    DECL_TRACER("TDrawImage::calcImagePosition(int with, int height, CENTER_CODE code, int number)");

    Button::SR_T act_sr;

    Button::POSITION_t position;

    int ix, iy;

    if (mSr.size() == 0)

        return position;

    if (number <= 0)

        act_sr = mSr.at(0);

    else if ((size_t)number < mSr.size())

        act_sr = mSr.at(number);

    else if ((size_t)number >= mSr.size())

        act_sr = mSr.at(mSr.size() - 1);

    else

        return position;

    int border_size = mBorderSize;

    int code, border = border_size;

    string dbgCC;

    int rwt = 0, rht = 0;

    code = act_sr.jb;

    ix = act_sr.bx;

    iy = act_sr.by;

    rwt = std::min(mWidth - border * 2, width);

    rht = std::min(mHeight - border_size * 2, height);

    if (width > rwt || height > rht)

        position.overflow = true;

    switch (code)

    {

        case 0: // absolute position

            position.left = ix;

            position.top = iy;

            if (ix < 0 && rwt < width)

                position.left *= -1;

            position.width = rwt;

            position.height = rht;

        break;

        case 1: // top, left

            position.width = rwt;

            position.height = rht;

        break;

        case 2: // center, top

            position.left = (mWidth - rwt) / 2;

            position.height = rht;

            position.width = rwt;

        break;

        case 3: // right, top

            position.left = mWidth - rwt;

            position.width = rwt;

            position.height = rht;

            break;

        case 4: // left, middle

            position.top = (mHeight - rht) / 2;

            position.width = rwt;

            position.height = rht;

            break;

        case 6: // right, middle

            position.left = mWidth - rwt;

            position.top = (mHeight - rht) / 2;

            position.width = rwt;

            position.height = rht;

            break;

        case 7: // left, bottom

            position.top = mHeight - rht;

            position.width = rwt;

            position.height = rht;

            break;

        case 8: // center, bottom

            position.left = (mWidth - rwt) / 2;

            position.top = mHeight - rht;

            position.width = rwt;

            position.height = rht;

            break;

        case 9: // right, bottom

            position.left = mWidth - rwt;

            position.top = mHeight - rht;

            break;

        default: // center, middle

            position.left = (mWidth - rwt) / 2;

            position.top = (mHeight - rht) / 2;

            position.width = rwt;

            position.height = rht;

    }

    MSG_DEBUG("PosType=" << code << ", Position: x=" << position.left << ", y=" << position.top << ", w=" << position.width << ", h=" << position.height << ", Overflow: " << (position.overflow ? "YES" : "NO"));

    position.valid = true;

    return position;

}