Disable Image Visual Pixel alignment when using Layer3D

Change-Id: Ida27856c20e86ba039ed256b56d4df36bedfbbf3

diff --git a/dali-toolkit/internal/visuals/image/image-visual.cpp b/dali-toolkit/internal/visuals/image/image-visual.cpp
index 5c8a004..3c82d75 100644 (file)
--- a/dali-toolkit/internal/visuals/image/image-visual.cpp
+++ b/dali-toolkit/internal/visuals/image/image-visual.cpp
@@ -20,6 +20,7 @@
 
 // EXTERNAL HEADERS
 #include <cstring> // for strlen()
+#include <dali/public-api/actors/layer.h>
 #include <dali/public-api/images/resource-image.h>
 #include <dali/public-api/images/native-image.h>
 #include <dali/devel-api/images/texture-set-image.h>
@@ -93,6 +94,9 @@ const Vector4 FULL_TEXTURE_RECT(0.f, 0.f, 1.f, 1.f);
 
 const char* DEFAULT_SAMPLER_TYPENAME = "sampler2D";
 
+const float PIXEL_ALIGN_ON = 1.0f;
+const float PIXEL_ALIGN_OFF = 0.0f;
+
 const char* VERTEX_SHADER = DALI_COMPOSE_SHADER(
   attribute mediump vec2 aPosition;\n
   uniform mediump mat4 uModelMatrix;\n
@@ -101,27 +105,28 @@ const char* VERTEX_SHADER = DALI_COMPOSE_SHADER(
   uniform mediump vec3 uSize;\n
   uniform mediump vec4 pixelArea;
   varying mediump vec2 vTexCoord;\n
+  uniform lowp float uPixelAligned;\n
   \n
-
   //Visual size and offset
   uniform mediump vec2 offset;\n
   uniform mediump vec2 size;\n
   uniform mediump vec4 offsetSizeMode;\n
   uniform mediump vec2 origin;\n
   uniform mediump vec2 anchorPoint;\n
-
+\n
   vec4 ComputeVertexPosition()\n
   {\n
     vec2 visualSize = mix(uSize.xy*size, size, offsetSizeMode.zw );\n
     vec2 visualOffset = mix( offset, offset/uSize.xy, offsetSizeMode.xy);\n
     return vec4( (aPosition + anchorPoint)*visualSize + (visualOffset + origin)*uSize.xy, 0.0, 1.0 );\n
   }\n
-
+\n
   void main()\n
   {\n
     mediump vec4 vertexPosition = uViewMatrix * uModelMatrix * ComputeVertexPosition();\n
-    vertexPosition.xy = floor ( vertexPosition.xy );\n // Pixel alignment
-    vertexPosition = uProjection *  vertexPosition;\n
+    vec4 alignedVertexPosition = vertexPosition;\n
+    alignedVertexPosition.xy = floor ( vertexPosition.xy );\n // Pixel alignment
+    vertexPosition = uProjection * mix( vertexPosition, alignedVertexPosition, uPixelAligned );\n
     vTexCoord = pixelArea.xy+pixelArea.zw*(aPosition + vec2(0.5) );\n
     gl_Position = vertexPosition;\n
   }\n
@@ -501,6 +506,8 @@ void ImageVisual::CreateRenderer( TextureSet& textures )
     }
   }
 
+  shader.RegisterProperty( PIXEL_ALIGNED_UNIFORM_NAME, PIXEL_ALIGN_ON ); // Set default to align
+
   mImpl->mRenderer = Renderer::New( geometry, shader );
   DALI_ASSERT_DEBUG( textures );
   mImpl->mRenderer.SetTextures( textures );
@@ -720,6 +727,14 @@ void ImageVisual::DoSetOnStage( Actor& actor )
 
   mPlacementActor = actor;
 
+  // Search the Actor tree to find if Layer UI behaviour set.
+  Layer layer = actor.GetLayer();
+  if ( layer && layer.GetBehavior() == Layer::LAYER_3D )
+  {
+     // Layer 3D set, do not align pixels
+     mImpl->mRenderer.RegisterProperty( PIXEL_ALIGNED_UNIFORM_NAME, PIXEL_ALIGN_OFF );
+  }
+
   if( mPixelArea != FULL_TEXTURE_RECT )
   {
     mImpl->mRenderer.RegisterProperty( PIXEL_AREA_UNIFORM_NAME, mPixelArea );

diff --git a/dali-toolkit/internal/visuals/image/image-visual.h b/dali-toolkit/internal/visuals/image/image-visual.h
index f2d7023..f771f6d 100644 (file)
--- a/dali-toolkit/internal/visuals/image/image-visual.h
+++ b/dali-toolkit/internal/visuals/image/image-visual.h
@@ -90,6 +90,9 @@ typedef IntrusivePtr< ImageVisual > ImageVisualPtr;
  *   "DONT_CARE"
  *   "DEFAULT"
  *
+ *
+ * If the Visual is in a LayerUI it will pixel align the image, using a Layer3D will disable pixel alignment.
+ * Changing layer behaviour between LayerUI to Layer3D whilst the visual is already staged will not have an effect.
  */
 class ImageVisual: public Visual::Base, public ConnectionTracker, public AtlasUploadObserver
 {

diff --git a/dali-toolkit/internal/visuals/visual-string-constants.cpp b/dali-toolkit/internal/visuals/visual-string-constants.cpp
index a7a3e2c..1fc3272 100644 (file)
--- a/dali-toolkit/internal/visuals/visual-string-constants.cpp
+++ b/dali-toolkit/internal/visuals/visual-string-constants.cpp
@@ -79,6 +79,7 @@ const char * const WRAP_MODE_UNIFORM_NAME( "wrapMode" );
 const char * const IMAGE_WRAP_MODE_U("wrapModeU");
 const char * const IMAGE_WRAP_MODE_V("wrapModeV");
 const char * const IMAGE_BORDER( "border" );
+const char * const PIXEL_ALIGNED_UNIFORM_NAME( "uPixelAligned" );
 
 // Text visual
 const char * const TEXT_PROPERTY( "text" );

diff --git a/dali-toolkit/internal/visuals/visual-string-constants.h b/dali-toolkit/internal/visuals/visual-string-constants.h
index 9817b7a..d57733c 100644 (file)
--- a/dali-toolkit/internal/visuals/visual-string-constants.h
+++ b/dali-toolkit/internal/visuals/visual-string-constants.h
@@ -66,6 +66,8 @@ extern const char * const WRAP_MODE_UNIFORM_NAME;
 extern const char * const IMAGE_WRAP_MODE_U;
 extern const char * const IMAGE_WRAP_MODE_V;
 extern const char * const IMAGE_BORDER;
+extern const char * const PIXEL_ALIGNED_UNIFORM_NAME;
+
 
 // Text visual
 extern const char * const TEXT_PROPERTY;