{
/**
+ * @brief Set the properties for the motion blur
+ *
+ * @param numBlurSamples Number of samples used by the shader
+ */
+inline void SetMotionBlurProperties( Actor& actor, unsigned int numBlurSamples = 8 )
+{
+ actor.RegisterProperty( "uBlurTexCoordScale", 0.125f );
+ actor.RegisterProperty( "uGeometryStretchFactor", 0.05f );
+ actor.RegisterProperty( "uSpeedScalingFactor", 0.5f );
+ actor.RegisterProperty( "uObjectFadeStart", Vector2( 0.25f, 0.25f ) );
+ actor.RegisterProperty( "uObjectFadeEnd", Vector2( 0.5f, 0.5f ) );
+ actor.RegisterProperty( "uAlphaScale", 0.75f );
+ actor.RegisterProperty( "uNumSamples", static_cast<float>( numBlurSamples ) );
+ actor.RegisterProperty( "uRecipNumSamples", 1.0f / static_cast<float>( numBlurSamples ) );
+ actor.RegisterProperty( "uRecipNumSamplesMinusOne", 1.0f / static_cast<float>( numBlurSamples - 1.0f ) );
+ Property::Index uModelProperty = actor.RegisterProperty( "uModelLastFrame", Matrix::IDENTITY );
+
+ Constraint constraint = Constraint::New<Matrix>( actor, uModelProperty, EqualToConstraint() );
+ constraint.AddSource( Source( actor , Actor::Property::WORLD_MATRIX ) );
+ constraint.Apply();
+}
+
+/**
* @brief Create a new MotionBlurEffect
*
* Motion blur shader works on a per object basis. Objects will
- * blur when they move, or if the camera moves. Can be applied to ImageActor or
- * TextActor only.
- *
- * Usage example:-
- *
- * // Create shader used for doing motion blur\n
- * ShaderEffect MotionBlurEffect = CreateMotionBlurEffect();
- *
- * // set actor shader to the blur one\n
- * Actor actor = Actor::New( ... );\n
- * actor.SetShaderEffect( MotionBlurEffect );
- *
- * // Constrain "uModelLastFrame" to be the same as the actor's world matrix\n
- * Dali::Property::Index uModelProperty = MotionBlurEffect.GetPropertyIndex( "uModelLastFrame" );
- * Constraint constraint = Constraint::New<Matrix>( MotionBlurEffect, uModelProperty, EqualToConstraint() );\n
- * constraint.AddSource( Source( actor , Actor::Property::WORLD_MATRIX ) );\n
- * constraint.Apply();\n
- *
+ * blur when they move, or if the camera moves.
*
* Animatable/Constrainable uniforms:
* "uBlurTexCoordScale" - This scales the offset for texture samples along the motion velocity vector.
* at the cost of performance.
* "uModelLastFrame" - The model to world space transformation matrix of the actor in the previous frame.
*
- * @param numBlurSamples Number of samples used by the shader
- * @return A handle to a newly allocated ShaderEffect
+ * @return The newly created Property::Map with the motion blur effect
*/
-inline ShaderEffect CreateMotionBlurEffect( unsigned int numBlurSamples = 8 )
+inline Property::Map CreateMotionBlurEffect()
{
- // Dali vertexSource prefix for reference:
- // precision highp float;
- // attribute vec3 aPosition;
- // attribute vec2 aTexCoord;
- // uniform mat4 uMvpMatrix;
- // uniform mat4 uModelView;
- // uniform mat3 uNormalMatrix;
- // uniform mat4 uProjection;
- // uniform vec4 uColor;
- // varying vec2 vTexCoord;
std::string vertexSource;
vertexSource =
"precision mediump float;\n"
+
+ "attribute vec2 aPosition;\n"
+
+ "uniform mat4 uMvpMatrix;\n"
+ "uniform mat4 uModelView;\n"
+ "uniform mat4 uViewMatrix;\n"
+ "uniform mat4 uProjection;\n"
+ "uniform vec3 uSize;\n"
+
"uniform mat4 uModelLastFrame;\n"
"float timeDelta = 0.0167;\n"
"varying vec2 vModelSpaceCenterToPos;\n"
"varying vec2 vScreenSpaceVelocityVector;\n"
"varying float vSpeed;\n"
+ "varying vec2 vTexCoord;\n"
"void main()\n"
"{\n"
// get view space position of vertex this frame and last frame
- " vec4 vertex = vec4(aPosition, 1.0);\n"
- " vec4 viewSpaceVertex = uModelView * vertex;\n"
- " vec4 viewSpaceVertexLastFrame = (uViewMatrix * uModelLastFrame) * vertex;\n"
+ " vec4 vertexPosition = vec4(aPosition, 0.0, 1.0);\n"
+ " vertexPosition.xyz *= uSize;\n"
+
+ " vec4 viewSpaceVertex = uModelView * vertexPosition;\n"
+ " vec4 viewSpaceVertexLastFrame = (uViewMatrix * uModelLastFrame) * vertexPosition;\n"
" float reciprocalTimeDelta = 1.0 / timeDelta;\n"
// work out vertex's last movement in view space
" vec3 viewSpacePosDelta = viewSpaceVertex.xyz - viewSpaceVertexLastFrame.xyz;\n"
// get clip space position of vertex this frame and last frame
- " vec4 clipSpaceVertex = uMvpMatrix * vertex;\n"
+ " vec4 clipSpaceVertex = uMvpMatrix * vertexPosition;\n"
" vec4 clipSpaceVertexLastFrame = uProjection * viewSpaceVertexLastFrame;\n"
// decide how much this vertex is 'trailing', i.e. at the back of the object relative to its direction of motion. We do this
" float posDeltaLength = length(viewSpacePosDelta);\n"
" if(posDeltaLength > 0.001)\n" // avoid div by 0 if object has barely moved
" {\n"
- " vec4 viewSpaceCenterToPos = uModelView * vec4(aPosition, 0.0);\n"
+ " vec4 viewSpaceCenterToPos = uModelView * vec4(vertexPosition.xy, 0.0, 0.0);\n"
" float centerToVertexDist = length(viewSpaceCenterToPos);\n"
" if(centerToVertexDist > 0.001)\n" // avoid div by 0 if object has vertex at model space origin
" {\n"
" vSpeed = clamp(vSpeed, 0.0, 1.0);\n"
// provide fragment shader with vector from center of object to pixel (assumes the objects model space origin is at its center and verts have same z)
- " vModelSpaceCenterToPos = aPosition.xy;\n"
+ " vModelSpaceCenterToPos = viewSpaceVertex.xy;\n"
- " vTexCoord = aTexCoord;\n"
+ " vec2 texCoord = aPosition + vec2(0.5);"
+ " vTexCoord = texCoord;\n"
"}\n";
- // Dali fragmentSource prefix for reference:
- // precision highp float;
- // uniform sampler2D sTexture;
- // uniform sampler2D sEffect;
- // uniform vec4 uColor;
- // varying vec2 vTexCoord;
std::string fragmentSource;
fragmentSource =
"precision mediump float;\n"
+
+ "uniform sampler2D sTexture;\n"
+ "uniform vec4 uColor;\n"
+
"uniform vec2 uObjectFadeStart;\n"
"uniform vec2 uObjectFadeEnd;\n"
"uniform float uAlphaScale;\n"
"varying vec2 vModelSpaceCenterToPos;\n"
"varying vec2 vScreenSpaceVelocityVector;\n"
"varying float vSpeed;\n"
+ "varying vec2 vTexCoord;\n"
"void main()\n"
"{\n"
" col += texture2D(sTexture, vTexCoord + (velocity * t)) * uRecipNumSamples;\n"
" }\n"
" gl_FragColor = mix(colActor, col, vSpeed);\n" // lerp blurred and non-blurred actor based on speed of motion
- " gl_FragColor.a = colActor.a * fadeToEdgesScale;\n" // fade blurred actor to its edges based on speed of motion
+ " gl_FragColor.a = fadeToEdgesScale;//colActor.a * fadeToEdgesScale;\n" // fade blurred actor to its edges based on speed of motion
" gl_FragColor *= uColor;\n"
"}\n";
+
+ Property::Map map;
+
+ Property::Map customShader;
+ customShader[ "vertexShader" ] = vertexSource;
+ customShader[ "fragmentShader" ] = fragmentSource;
+
+ customShader[ "subdivideGridX" ] = 10;
+ customShader[ "subdivideGridY" ] = 10;
+
// NOTE: we must turn on alpha blending for the actor (HINT_BLENDING)
- ShaderEffect shader = ShaderEffect::New( vertexSource, fragmentSource,
- ShaderEffect::GeometryHints( ShaderEffect::HINT_BLENDING | ShaderEffect::HINT_GRID) );
-
- //////////////////////////////////////
- // Register uniform properties
- //
- //
- shader.SetUniform( "uBlurTexCoordScale", 0.125f );
- shader.SetUniform( "uGeometryStretchFactor", 0.05f );
- shader.SetUniform( "uSpeedScalingFactor", 0.5f );
- shader.SetUniform( "uObjectFadeStart", Vector2( 0.25f, 0.25f ) );
- shader.SetUniform( "uObjectFadeEnd", Vector2( 0.5f, 0.5f ) );
- shader.SetUniform( "uAlphaScale", 0.75f );
- shader.SetUniform( "uNumSamples", static_cast<float>( numBlurSamples ) );
- shader.SetUniform( "uRecipNumSamples", 1.0f / static_cast<float>( numBlurSamples ) );
- shader.SetUniform( "uRecipNumSamplesMinusOne", 1.0f / static_cast<float>( numBlurSamples - 1.0f ) );
- shader.SetUniform( "uModelLastFrame", Matrix::IDENTITY );
-
- return shader;
+ customShader[ "hints" ] = "outputIsTransparent";
+
+ map[ "shader" ] = customShader;
+ return map;
}
}
projects / platform / core / uifw / dali-toolkit.git / blobdiff