-#ifndef __DALI_TOOLKIT_SHADER_EFFECT_DISSOLVE_H__
-#define __DALI_TOOLKIT_SHADER_EFFECT_DISSOLVE_H__
+#ifndef DALI_TOOLKIT_SHADER_EFFECT_DISSOLVE_H
+#define DALI_TOOLKIT_SHADER_EFFECT_DISSOLVE_H
/*
- * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2020 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*/
// EXTERNAL INCLUDES
-#include <dali/public-api/shader-effects/shader-effect.h>
+#include <dali/public-api/rendering/shader.h>
+#include <string.h>
+
+// INTERNAL INCLUDES
+#include <dali-toolkit/public-api/visuals/visual-properties.h>
namespace Dali
{
-
namespace Toolkit
{
+/**
+ * @brief Set the dissolve central line.
+ *
+ * Use one point (position) and one direction ( displacement ) vector to define this line
+ * As we use the texture coordinate as pixel position to calculate random offset,
+ * the line should passing through rectangle {(0,0),(0,1),(1,0),(1,1)},
+ * so make the position parameter with two component values between 0.0 to 1.0
+ * @param[in] actor The actor that registers the uniform properties
+ * @param[in] position The point ( locates within rectangle {(0,0),(0,1),(1,0),(1,1)} ) passed through by the central line
+ * @param[in] displacement The direction of the central line
+ * @param[in] initialProgress The normalised initial progress of the shader
+ */
+inline void DissolveEffectSetCentralLine(Actor& actor, const Vector2& position, const Vector2& displacement, float initialProgress)
+{
+ // the line passes through 'position' and has the direction of 'displacement'
+ float coefA, coefB, coefC; //line equation: Ax+By+C=0;
+ coefA = displacement.y;
+ coefB = -displacement.x;
+ coefC = -displacement.y * position.x + displacement.x * position.y;
+
+ float inversedAABB = 1.f / (coefA * coefA + coefB * coefB);
+ float inversedSqrtAABB = sqrtf(inversedAABB);
+ float saddleA;
+ //saddle surface(Hyperbolic paraboloid)function, used to calculate the dissolve starting time
+ //z = y*y/a/a - x*x/b/b
+ //with our selection of parameters(a and b), this value for any texture coordinate is between -1.0 and 1.0
+
+ Vector3 saddleParam; // [0]: a*a, [1]: b*b, [2] b
+ Vector2 translation;
+ Vector2 rotation;
+ float toNext = -1.f;
+ if(displacement.x > 0.f || (EqualsZero(displacement.x) && displacement.y > 0.f))
+ {
+ toNext = 1.f;
+ }
+
+ if((displacement.y * displacement.x < 0.0f))
+ {
+ //distance from (0,0) to the line
+ float distanceTopLeft = fabsf(coefC) * inversedSqrtAABB;
+ //distance from (1, 1 ) to the line
+ float distanceBottomRight = fabsf(coefA + coefB + coefC) * inversedSqrtAABB;
+ saddleA = std::max(distanceTopLeft, distanceBottomRight);
+
+ //foot of a perpendicular: (1,0) to the line
+ float footX1 = (coefB * coefB - coefA * coefC) * inversedAABB;
+ float footY1 = (-coefA * coefB - coefB * coefC) * inversedAABB;
+ //foot of a perpendicular: (0,1) to the line
+ float footX2 = (-coefA * coefB - coefA * coefC) * inversedAABB;
+ float footY2 = (coefA * coefA - coefB * coefC) * inversedAABB;
+ saddleParam[1] = (footX1 - footX2) * (footX1 - footX2) + (footY1 - footY2) * (footY1 - footY2);
+ translation = Vector2(-footX2, -footY2);
+ }
+ else
+ {
+ //distance from(1,0) to the line
+ float distanceTopRight = fabsf(coefA + coefC) * inversedSqrtAABB;
+ //distance from(0,1) to the line
+ float distanceBottomLeft = fabsf(coefB + coefC) * inversedSqrtAABB;
+ saddleA = std::max(distanceTopRight, distanceBottomLeft);
+ //foot of a perpendicular: (0,0) to the line
+ float footX3 = (-coefA * coefC) * inversedAABB;
+ float footY3 = (-coefB * coefC) * inversedAABB;
+ //foot of a perpendicular: (1.0,1.0) to the line
+ float footX4 = (coefB * coefB - coefA * coefB - coefA * coefC) * inversedAABB;
+ float footY4 = (-coefA * coefB + coefA * coefA - coefB * coefC) * inversedAABB;
+ saddleParam[1] = (footX3 - footX4) * (footX3 - footX4) + (footY3 - footY4) * (footY3 - footY4);
+ translation = Vector2(-footX3, -footY3);
+ }
+
+ saddleParam[2] = sqrtf(saddleParam[1]);
+ saddleParam[0] = saddleA * saddleA;
+ rotation = Vector2(-displacement.x, displacement.y);
+ rotation.Normalize();
+
+ actor.RegisterProperty("uSaddleParam", saddleParam);
+ actor.RegisterProperty("uTranslation", translation);
+ actor.RegisterProperty("uRotation", rotation);
+ actor.RegisterProperty("uToNext", toNext);
+ actor.RegisterProperty("uPercentage", initialProgress, Dali::Property::ANIMATABLE);
+}
/**
- * @brief DissolveEffect is a custom shader effect to achieve Dissolve effects in Image actors.
+ * @brief Create a new Dissolve effect
+ *
+ * DissolveEffect is a custom shader effect to achieve Dissolve effects in image views.
+ *
+ * Animatable/Constrainable uniforms:
+ * "uPercentage" - This value is proportional to the distortion applied; a value of zero means no distortion.
+ *
+ * @param[in] useHighPrecision True if using high precision in fragment shader for fully random noise, false otherwise
+ * @return The newly created Property::Map with the dissolve effect
*/
-class DALI_IMPORT_API DissolveEffect : public ShaderEffect
+
+inline Property::Map CreateDissolveEffect(bool useHighPrecision = true)
{
-public:
-
- /**
- * @brief Create an uninitialized DissolveEffect; this can be initialized with DissolveEffect::New().
- *
- * Calling member functions with an uninitialized Dali::Object is not allowed.
- */
- DissolveEffect();
-
- /**
- * @brief Destructor
- *
- * This is non-virtual since derived Handle types must not contain data or virtual methods.
- */
- ~DissolveEffect();
-
- /**
- * @brief Create an initialized DissolveEffect.
- *
- * @param[in] useHighPrecision True if using high precision in fragment shader for fully random noise, false otherwise
- * @return A handle to a newly allocated Dali resource.
- */
- static DissolveEffect New( bool useHighPrecision = true);
-
- /**
- * @brief Set the dissolve central line.
- *
- * Use one point (position) and one direction ( displacement ) vector to define this line
- * As we use the texture coordinate as pixel position to calculate random offset,
- * the line should passing through rectangle {(0,0),(0,1),(1,0),(1,1)},
- * so make the position parameter with two component values between 0.0 to 1.0
- * @param[in] position The point ( locates within rectangle {(0,0),(0,1),(1,0),(1,1)} ) passed through by the central line
- * @param[in] displacement The direction of the central line
- */
- void SetCentralLine( const Vector2& position, const Vector2& displacement );
-
- /**
- * @brief 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] distortion The distortion value.
- */
- void SetDistortion( float distortion );
-
- /**
- * @brief Get the name for the distortion property.
- *
- * @return A std::string containing the property name
- */
- const std::string& GetDistortionPropertyName() const;
-
-private: // Not intended for application developers
- DALI_INTERNAL DissolveEffect(ShaderEffect handle);
-};
+ const char* prefixHighPrecision("precision highp float;\n");
+ const char* prefixMediumPrecision("precision mediump float;\n");
+
+ const char* vertexShader(
+ "attribute mediump vec2 aPosition;\n"
+ "\n"
+ "uniform mediump mat4 uMvpMatrix;\n"
+ "uniform vec3 uSize;\n"
+ "uniform vec4 uTextureRect;"
+ "\n"
+ "uniform float uPercentage;\n"
+ "uniform vec3 uSaddleParam;\n"
+ "uniform vec2 uTranslation;\n"
+ "uniform vec2 uRotation; \n"
+ "uniform float uToNext;\n"
+ "\n"
+ "varying float vPercentage;\n"
+ "varying vec2 vTexCoord;\n"
+ "\n"
+ "void main()\n"
+ "{\n"
+ " mediump vec4 vertexPosition = vec4(aPosition, 0.0, 1.0);\n"
+ " vertexPosition.xyz *= uSize;\n"
+ " vertexPosition = uMvpMatrix * vertexPosition;\n"
+ " gl_Position = vertexPosition;\n"
+ "\n"
+ " vec2 texCoord = aPosition + vec2(0.5);\n"
+ " vTexCoord = texCoord;\n"
+ "\n"
+ " //Calculate the distortion value given the dissolve central line\n"
+ " vec2 value = texCoord + uTranslation;\n"
+ " mat2 rotateMatrix = mat2(uRotation.s, uRotation.t, -uRotation.t, uRotation.s);\n"
+ " value = rotateMatrix * value;\n"
+ " if(uToNext == 1.0)\n"
+ " value.s = uSaddleParam[2] + value.s;\n"
+ " float delay = value.t * value.t / uSaddleParam[0] - value.s * value.s / uSaddleParam[1];\n"
+ " vPercentage = clamp(uPercentage * 2.0 - 0.5 * sin(delay * 1.571) - 0.5, 0.0, 1.0);\n"
+ "}\n");
+
+ const char* fragmentShader(
+ "varying float vPercentage;\n"
+ "varying mediump vec2 vTexCoord;\n"
+ "\n"
+ "uniform sampler2D sTexture;\n"
+ "uniform lowp vec4 uColor;\n"
+ "uniform vec4 uTextureRect;\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\n"
+ " float offsetS = rand(vTexCoord * vPercentage) - vTexCoord.s;\n"
+ " float offsetT = rand(vec2(vTexCoord.t * vPercentage, vTexCoord.s * vPercentage)) - vTexCoord.t;\n"
+ " vec2 lookupCoord = vTexCoord + vec2(offsetS, offsetT) * vPercentage;\n"
+ " gl_FragColor = texture2D(sTexture, lookupCoord) * uColor;\n"
+ " gl_FragColor.a *= 1.0 - vPercentage;\n"
+ "}\n");
+
+ Property::Map map;
+
+ Property::Map customShader;
+
+ std::string vertexShaderString;
+ std::string fragmentShaderString;
+ if(useHighPrecision)
+ {
+ vertexShaderString.reserve(strlen(prefixHighPrecision) + strlen(vertexShader));
+ vertexShaderString.append(prefixHighPrecision);
+
+ fragmentShaderString.reserve(strlen(prefixHighPrecision) + strlen(fragmentShader));
+ fragmentShaderString.append(prefixHighPrecision);
+ }
+ else
+ {
+ vertexShaderString.reserve(strlen(prefixMediumPrecision) + strlen(vertexShader));
+ vertexShaderString.append(prefixMediumPrecision);
+
+ fragmentShaderString.reserve(strlen(prefixMediumPrecision) + strlen(fragmentShader));
+ fragmentShaderString.append(prefixMediumPrecision);
+ }
+
+ vertexShaderString.append(vertexShader);
+ fragmentShaderString.append(fragmentShader);
+
+ customShader[Visual::Shader::Property::VERTEX_SHADER] = vertexShaderString;
+ customShader[Visual::Shader::Property::FRAGMENT_SHADER] = fragmentShaderString;
+
+ customShader[Visual::Shader::Property::SUBDIVIDE_GRID_X] = 20;
+ customShader[Visual::Shader::Property::SUBDIVIDE_GRID_Y] = 20;
+
+ customShader[Visual::Shader::Property::HINTS] = Shader::Hint::OUTPUT_IS_TRANSPARENT;
+
+ map[Toolkit::Visual::Property::SHADER] = customShader;
+ return map;
+}
} // namespace Toolkit
} // namespace Dali
-#endif // __DALI_TOOLKIT_SHADER_EFFECT_DISSOLVE_H__
+#endif // DALI_TOOLKIT_SHADER_EFFECT_DISSOLVE_H
projects / platform / core / uifw / dali-toolkit.git / blobdiff