Text: add one more GlyphCache constructor combination.

src/Text/GlyphCache.cpp

@@ -31,6 +31,8 @@
 
 namespace Magnum { namespace Text {
 
+/** @todo Do this using delegating constructors when support for GCC 4.6 is dropped */
+
 GlyphCache::GlyphCache(const TextureFormat internalFormat, const Vector2i& originalSize, const Vector2i& size, const Vector2i& padding): _size(originalSize), _padding(padding) {
     initialize(internalFormat, size);
 }
@@ -39,7 +41,17 @@ GlyphCache::GlyphCache(const TextureFormat internalFormat, const Vector2i& size,
     initialize(internalFormat, size);
 }
 
+GlyphCache::GlyphCache(const Vector2i& originalSize, const Vector2i& size, const Vector2i& padding): _size(originalSize), _padding(padding) {
+    initialize(size);
+}
+
 GlyphCache::GlyphCache(const Vector2i& size, const Vector2i& padding): _size(size), _padding(padding) {
+    initialize(size);
+}
+
+GlyphCache::~GlyphCache() = default;
+
+void GlyphCache::initialize(const Vector2i& size) {
     #ifndef MAGNUM_TARGET_GLES
     MAGNUM_ASSERT_EXTENSION_SUPPORTED(Extensions::GL::ARB::texture_rg);
     #endif
@@ -55,8 +67,6 @@ GlyphCache::GlyphCache(const Vector2i& size, const Vector2i& padding): _size(siz
     initialize(internalFormat, size);
 }
 
-GlyphCache::~GlyphCache() = default;
-
 void GlyphCache::initialize(const TextureFormat internalFormat, const Vector2i& size) {
     /* Initialize texture */
     _texture.setWrapping(Sampler::Wrapping::ClampToEdge)

src/Text/GlyphCache.h

@@ -70,7 +70,7 @@ class MAGNUM_TEXT_EXPORT GlyphCache {
          * although the actual glyph cache texture has @p size. Glyph
          * @p padding can be used to account for e.g. glyph shadows.
          */
-        explicit GlyphCache(TextureFormat internalFormat, const Vector2i& originalSize, const Vector2i& size, const Vector2i& padding);
+        explicit GlyphCache(TextureFormat internalFormat, const Vector2i& originalSize, const Vector2i& size, const Vector2i& padding = Vector2i());
 
         /**
          * @brief Constructor
@@ -87,6 +87,13 @@ class MAGNUM_TEXT_EXPORT GlyphCache {
          * ES2 uses @es_extension{EXT,texture_rg}, if available, or
          * @ref TextureFormat "TextureFormat::Luminance" as fallback.
          */
+        explicit GlyphCache(const Vector2i& originalSize, const Vector2i& size, const Vector2i& padding = Vector2i());
+
+        /**
+         * @brief Constructor
+         *
+         * Same as calling the above with @p originalSize and @p size the same.
+         */
         explicit GlyphCache(const Vector2i& size, const Vector2i& padding = Vector2i());
 
         virtual ~GlyphCache();
@@ -178,6 +185,7 @@ class MAGNUM_TEXT_EXPORT GlyphCache {
         virtual void setImage(const Vector2i& offset, const ImageReference2D& image);
 
     private:
+        void MAGNUM_LOCAL initialize(const Vector2i& size);
         void MAGNUM_LOCAL initialize(TextureFormat internalFormat, const Vector2i& size);
 
         Vector2i _size, _padding;