// EXTERNAL INCLUDES
#include <dali/public-api/shader-effects/shader-effect.h>
+#include <sstream>
namespace Dali
{
{
/**
+ * @brief Create a new DissolveLocalEffect
+ *
* DissolveLocalEffect is a custom shader effect to achieve Dissolve effects in multiple small areas of Image actors
+ *
+ * Animatable/Constrainable uniforms:
+ * "uTransparency"
+ * "uCenter" - The center positions of each dimples
+ * "uRadius" - The propagation radius of each dimple
+ * "uPercentage" - The distortion applied to the effect texture. A value of zero means no distortion
+ *
+ * @param[in] numberOfDimples The number of dimples
+ * @return A handle to a newly allocated ShaderEffect
*/
-class DALI_IMPORT_API DissolveLocalEffect : public ShaderEffect
+inline ShaderEffect CreateDissolveLocalEffect( unsigned int numberOfDimples )
{
-public:
-
- /**
- * Create an uninitialized DissolveLocalEffect; this can be initialized with DissolveLocalEffect::New()
- * Calling member functions with an uninitialized Dali::Object is not allowed.
- */
- DissolveLocalEffect();
-
- /**
- * @brief Destructor
- *
- * This is non-virtual since derived Handle types must not contain data or virtual methods.
- */
- ~DissolveLocalEffect();
-
- /**
- * Create an initialized DissolveLocalEffect.
- * @param[in] numberOfDimples The number of dimples
- * @return A handle to a newly allocated Dali resource.
- */
- static DissolveLocalEffect New( unsigned int numberOfDimples );
-
- /**
- * Get the number of dimples the shader supports.
- * @return The number of dimples in the shader.
- */
- unsigned int GetNumberOfDimples() const;
-
- /**
- * Set the transparency of the drifted pixels.
- * @param[in] transparency The transparency of the drifted pixels.
- */
- void SetTransparency( float transparency);
-
- /**
- * Set the certer position of a dimple.
- * @param[in] index The index of the dimple to change.
- * @param[in] center The center position of the dimple.
- * @pre index has to be between 0 and GetNumberOfDimples() - 1
- */
- void SetCenter( unsigned int index, const Vector2& center );
-
- /**
- * Set the propogation radius of a dimple.
- * @param[in] index The index of the dimple to change.
- * @param[in] radius The propagation radius of the dimple.
- * @pre index has to be between 0 and GetNumberOfDimples() - 1
- */
- void SetRadius( unsigned int index, float radius );
-
- /**
- * Sets the distortion applied to the effect texture.
- * This value is proportional to the distortion applied; a value of zero means no distortion.
- * @param[in] index The index of the dimple to change.
- * @param[in] distortion The distortion value.
- * @pre index has to be between 0 and GetNumberOfDimples() - 1
- */
- void SetDistortion( unsigned int index, float distortion );
-
- /**
- * Get the name of the center property of a dimple.
- * @param[in] index The index of the dimple.
- * @return A std::string containing the property name.
- * @pre index has to be between 0 and GetNumberOfDimples() - 1
- */
- std::string GetCenterPropertyName( unsigned int index ) const;
-
- /**
- * Get the name of the radius property of a dimple.
- * @param[in] index The index of the dimple.
- * @return A std::string containing the property name
- * @pre index has to be between 0 and GetNumberOfDimples() - 1
- */
- std::string GetRadiusPropertyName( unsigned int index ) const;
-
- /**
- * Get the name for the distortion property of a dimple
- * @param[in] index the index of a dimple.
- * @return A std::string containing the property name
- * @pre index has to be between 0 and GetNumberOfDimples() - 1
- */
- std::string GetDistortionPropertyName( unsigned int index ) const;
-
-private: // Not intended for application developers
-
- DALI_INTERNAL DissolveLocalEffect( ShaderEffect handle );
-
-private:
-
- unsigned int mNumberOfDimples; ///< The number of dimples the shader supports
-
-};
+ std::ostringstream vertexShaderStringStream;
+ vertexShaderStringStream << "#define NUMBER_OF_DIMPLE "<< numberOfDimples << "\n";
+ std::string vertexShader(
+ "precision highp float;\n"
+ "uniform vec2 uCenter[ NUMBER_OF_DIMPLE ];\n"
+ "uniform float uRadius[ NUMBER_OF_DIMPLE ]; \n"
+ "uniform float uPercentage[ NUMBER_OF_DIMPLE ]; \n"
+ "varying float vPercentage;\n"
+ "void main()\n"
+ "{\n"
+ " vec4 position = uModelView * vec4( aPosition, 1.0 );\n"
+ " float percentage = 0.0;\n"
+ " for( int i=0; i<NUMBER_OF_DIMPLE; ++i )\n"
+ " {\n"
+ " float distance = distance(uCenter[i], position.xy);\n"
+ " percentage = max(percentage, uPercentage[i] * cos(clamp( distance/uRadius[i], 0.0, 1.0 )*1.57) );"
+ " }\n"
+ " vPercentage = clamp( percentage, 0.0, 1.0 );\n"
+ " gl_Position = uProjection * position;\n"
+ " vTexCoord = aTexCoord;\n"
+ "}\n");
+ vertexShaderStringStream << vertexShader;
+
+ std::string fragmentShader(
+ "precision highp float;\n"
+ "uniform float uTransparency;\n"
+ "varying float vPercentage;\n"
+ "float rand(vec2 co) \n"
+ "{\n"
+ " return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453); \n"
+ "}\n"
+ "void main()\n"
+ "{\n"
+ //Calculate the randomness
+ " float offsetS = rand( vTexCoord * vPercentage ); \n"
+ " float offsetT = rand( vec2(vTexCoord.t*vPercentage, vTexCoord.s * vPercentage) ); \n"
+ " vec2 lookupCoord = vTexCoord + vec2(offsetS, offsetT) * vPercentage; \n"
+ " gl_FragColor = texture2D( sTexture, lookupCoord ) * uColor; \n"
+ " gl_FragColor.a *= 1.0 - uTransparency*vPercentage; \n"
+ "}\n");
+
+ ShaderEffect shaderEffect = ShaderEffect::New(
+ vertexShaderStringStream.str(), fragmentShader,
+ GeometryType( GEOMETRY_TYPE_IMAGE),
+ ShaderEffect::GeometryHints( ShaderEffect::HINT_GRID | ShaderEffect::HINT_BLENDING ) );
+
+ //Register uniform properties
+ std::ostringstream oss;
+ for( unsigned int i = 0; i < numberOfDimples; i++ )
+ {
+ oss.str("");
+ oss<< "uCenter["<< i << "]";
+ shaderEffect.SetUniform(oss.str(), Vector2(0.f,0.f));
+
+ oss.str("");
+ oss<< "uRadius["<< i << "]";
+ shaderEffect.SetUniform(oss.str(), 0.f);
+
+ oss.str("");
+ oss<< "uPercentage["<< i << "]";
+ shaderEffect.SetUniform( oss.str(), 0.f );
+ }
+
+ shaderEffect.SetProperty( ShaderEffect::Property::GRID_DENSITY, Dali::Property::Value(5.f) );
+ shaderEffect.SetUniform( "uTransparency", 0.5f );
+
+ return shaderEffect;
+}
} // namespace Toolkit
projects / platform / core / uifw / dali-toolkit.git / blobdiff