Fixed a problem where text size exceeds maximum texture size.

   - Adjusts the length of the text to the maximum texture size.
   - Dropped text will be shown as ellipsis.

Change-Id: Ie342327fcb8cb1ba0827b3943101ce2b141ac17d

diff --git a/dali-toolkit/internal/controls/text-controls/text-label-impl.cpp b/dali-toolkit/internal/controls/text-controls/text-label-impl.cpp
index 13cf696..148462a 100644 (file)
--- a/dali-toolkit/internal/controls/text-controls/text-label-impl.cpp
+++ b/dali-toolkit/internal/controls/text-controls/text-label-impl.cpp
@@ -21,6 +21,7 @@
 // EXTERNAL INCLUDES
 #include <dali/public-api/object/type-registry-helper.h>
 #include <dali/devel-api/object/property-helper-devel.h>
+#include <dali/devel-api/adaptor-framework/image-loading.h>
 #include <dali/integration-api/debug.h>
 
 // INTERNAL INCLUDES
@@ -919,8 +920,24 @@ void TextLabel::SetUpAutoScrolling()
   Vector2 textureSize = textNaturalSize + Vector2(wrapGap, 0.0f); // Add the gap as a part of the texture
 
   // Create a texture of the text for scrolling
+  Size verifiedSize = textureSize;
+  const int maxTextureSize = Dali::GetMaxTextureSize();
+
+  //if the texture size width exceed maxTextureSize, modify the visual model size and enabled the ellipsis
+  if( verifiedSize.width > maxTextureSize )
+  {
+    verifiedSize.width = maxTextureSize;
+    if( textNaturalSize.width > maxTextureSize )
+    {
+      mController->SetTextElideEnabled( true );
+    }
+    GetHeightForWidth( maxTextureSize );
+    wrapGap = std::max( maxTextureSize - textNaturalSize.width, 0.0f );
+  }
+
   Text::TypesetterPtr typesetter = Text::Typesetter::New( mController->GetTextModel() );
-  PixelData data = typesetter->Render( textureSize, Text::Typesetter::RENDER_TEXT_AND_STYLES, true, Pixel::RGBA8888 ); // ignore the horizontal alignment
+
+  PixelData data = typesetter->Render( verifiedSize, Text::Typesetter::RENDER_TEXT_AND_STYLES, true, Pixel::RGBA8888 ); // ignore the horizontal alignment
   Texture texture = Texture::New( Dali::TextureType::TEXTURE_2D,
                                   data.GetPixelFormat(),
                                   data.GetWidth(),
@@ -938,7 +955,7 @@ void TextLabel::SetUpAutoScrolling()
 
   // Set parameters for scrolling
   Renderer renderer = static_cast<Internal::Visual::Base&>( GetImplementation( mVisual ) ).GetRenderer();
-  mTextScroller->SetParameters( Self(), renderer, textureSet, controlSize, textureSize, wrapGap, direction, mController->GetHorizontalAlignment(), mController->GetVerticalAlignment() );
+  mTextScroller->SetParameters( Self(), renderer, textureSet, controlSize, verifiedSize, wrapGap, direction, mController->GetHorizontalAlignment(), mController->GetVerticalAlignment() );
 }
 
 void TextLabel::ScrollingFinished()

diff --git a/dali-toolkit/public-api/controls/text-controls/text-label.h b/dali-toolkit/public-api/controls/text-controls/text-label.h
index 6536746..ec6613c 100644 (file)
--- a/dali-toolkit/public-api/controls/text-controls/text-label.h
+++ b/dali-toolkit/public-api/controls/text-controls/text-label.h
@@ -240,6 +240,7 @@ public:
        * @details Name "autoScrollGap", type Property::INT.
        * @SINCE_1_1.35
        * @note Default in style sheet but can be overridden to prevent same text being shown at start and end.
+       * @note Displayed gap size is not guaranteed if the text length plus gap exceeds the maximum texture size (i.e. GL_MAX_TEXTURE_SIZE).
        */
       AUTO_SCROLL_GAP,