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C#-Quelltext

void CreateMaskFromColor(const Color col, ubyte alpha) {
    const Color new_col = col.Modify(Color.Spectrum.Alpha, alpha);

    ubyte[] color_data;

    foreach (const Color pixel_col; this._colors) {
        if (pixel_col != col) {
            color_data ~= pixel_col.Export();
        } else {
            color_data ~= new_col.Export();
        }
    }

    //this.LoadFromPixels(&color_data[0], this._width, this._height, this._deepth, this._format);
    this.Update(&color_data[0]);
}

C#-Quelltext

// Wenn es schon eine Textur gibt...
if (this._format != Format.None) {
    // Alte löschen...
    this._Delete();
}

// neu generieren.
this._Create();

if (pixels !is null) {
    const ubyte* col_pixels = cast(ubyte*)(pixels);
    //writefln("R: %d, G: %d, B: %d, A: %d", pixels[0], pixels[1], pixels[2], pixels[3]);

    this._colors.clear();

    const uint len = width * height;
    for (uint i = 0; i < len; ++i) {
        ubyte[4] col;

        for (ubyte j = 0; j < 4; ++j) {
            col[j] = col_pixels[i * 4 + j];
        }

        this._colors ~= new Color(col);
    }
}

C#-Quelltext

Surface SubSurface(const Rect rect = null) const {
    if (rect is null) {
        return this.GetCopy();
    }

    Surface copy = new Surface();
    copy.Create(rect.Width, rect.Height, 32);

    assert(copy.CountBits() == 32);

    copy.Blit(this, null, rect);

    return copy;
}

C#-Quelltext

Surface SubSurface(const Rect rect = null) const {
    if (rect is null) {
        return this.GetCopy();
    }

    Surface copy = new Surface();
    copy.Create(rect.Width, rect.Height, 32);

    assert(copy.CountBits() == 32);

    copy.Fill(Color.White); // <-- auffüllen mit weiß statt schwarz, wie es automatisch geschieht.

    copy.Blit(this, null, rect);

    return copy;
}

Quellcode

glBlendFunc(GL_SRC_ALPHA, GL_SRC_COLOR);

Quellcode

glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_COLOR);