CWE-ou-minkata/Sources/Tools/plFontConverter/plFontPreview.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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Additional permissions under GNU GPL version 3 section 7

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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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*==LICENSE==*/
#include "plFontPreview.h"

#include "plGImage/plFont.h"
#include "plGImage/plMipmap.h"

#include <QPainter>
#include <QPicture>

#include <memory>

void plFontPreview::Update(plFont *font, const QString &text)
{
    fFont = font;
    fText = text;
    fPreview = QImage(width(), height(), QImage::Format_ARGB32);

    if (fFont == nullptr) {
        QPainter p(&fPreview);
        p.fillRect(0, 0, width(), height(), Qt::white);

        update();
        return;
    }

    plString testString = text.toUtf8().constData();

    // Create us a mipmap to render onto, render onto it, then copy that to our DC
    plMipmap *mip = new plMipmap(width(), height(), plMipmap::kARGB32Config, 1);
    memset(mip->GetImage(), 0xff, mip->GetWidth() * mip->GetHeight() * 4);

    fFont->SetRenderColor(0xff000000);
    fFont->SetRenderFlag(plFont::kRenderClip, true);
    fFont->SetRenderClipRect(0, 0, (int16_t)width(), (int16_t)height());
    uint16_t w, h, a, lastX, lastY;
    uint32_t firstCC;
    fFont->CalcStringExtents(testString, w, h, a, firstCC, lastX, lastY);

    int cY = ((height() - h) >> 1) + a;

    if (cY < 0)
        cY = 0;
    else if (cY > height() - 1)
        cY = height() - 1;

    memset(mip->GetAddr32(8, cY), 0xc0, (width() - 8) * 4);

    fFont->RenderString(mip, 8, cY, testString);

    int x, y;
    for (y = 0; y < height(); y++) {
        for (x = 0; x < width(); x++) {
            uint32_t color = *mip->GetAddr32(x, y);

            if (color != 0xffffffff && color != 0xff000000)
            {
                int q = 0;
            }
            // One pixel at a time?  Surely we can do better...
            // But for now this is a pure port
            fPreview.setPixel(x, y, color | 0xff000000);
        }
    }
    delete mip;

    update();
}

void plFontPreview::paintEvent(QPaintEvent *event)
{
    QPainter painter(this);
    painter.drawImage(0, 0, fPreview);

    QFrame::paintEvent(event);
}