libgui|Image: Serializing an image

skyjake · Sep 1, 2019 · ee064b6 · ee064b6
1 parent 4ad459a
commit ee064b6
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Showing 2 changed files with 34 additions and 2 deletions.
diff --git a/doomsday/libs/gui/include/de/graphics/image.h b/doomsday/libs/gui/include/de/graphics/image.h
@@ -48,7 +48,6 @@ class LIBGUI_PUBLIC Image : public ISerializable
      */
     enum Format {
         Unknown           = -1,
-//        UseQImageFormat   = 0, ///< May not be GL friendly.
 
         Luminance_8       = 1,
         LuminanceAlpha_88 = 2,
@@ -81,6 +80,8 @@ class LIBGUI_PUBLIC Image : public ISerializable
         RGBA_32ui         = 29,
     };
 
+    enum SerializationFormat { Png, Jpeg, Targa, Bmp };
+
     typedef Vec2ui Size;
     typedef Vec4ub Color;
     typedef Vector4<duint16> Color16;
@@ -245,7 +246,8 @@ class LIBGUI_PUBLIC Image : public ISerializable
     Image rgbSwapped() const;
     Image flipped() const;
 
-    void save(const NativePath &path) const;
+    void  save(const NativePath &path) const;
+    Block serialize(SerializationFormat format) const;
 
     // Implements ISerializable.
     void operator >> (Writer &to) const;

diff --git a/doomsday/libs/gui/src/graphics/image.cpp b/doomsday/libs/gui/src/graphics/image.cpp
@@ -1021,6 +1021,36 @@ void Image::save(const NativePath &path) const
     }
 }
 
+static void dataWriter(void *context, void *data, int size)
+{
+    reinterpret_cast<Block *>(context)->append(data, size);
+}
+
+Block Image::serialize(SerializationFormat format) const
+{
+    Block data;
+    const int comp = bytesPerPixel() / 4;
+    switch (format)
+    {
+    case Png:
+        stbi_write_png_to_func(dataWriter, &data, width(), height(), comp, bits(), stride());
+        break;
+
+    case Jpeg:
+        stbi_write_jpg_to_func(dataWriter, &data, width(), height(), comp, bits(), 85);
+        break;
+
+    case Targa:
+        stbi_write_tga_to_func(dataWriter, &data, width(), height(), comp, bits());
+        break;
+
+    case Bmp:
+        stbi_write_bmp_to_func(dataWriter, &data, width(), height(), comp, bits());
+        break;
+    }
+    return data;
+}
+
 void Image::operator>>(Writer &to) const
 {
     to << duint8(d->format);