Initial

resources/app/client/pixi/webgl/shaders/region/adjust-darkness-level.js

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+/**
+ * Abstract shader used for Adjust Darkness Level region behavior.
+ * @abstract
+ * @internal
+ * @ignore
+ */
+class AbstractDarknessLevelRegionShader extends RegionShader {
+
+  /** @inheritDoc */
+  static defaultUniforms = {
+    ...super.defaultUniforms,
+    bottom: 0,
+    top: 0,
+    depthTexture: null
+  };
+
+  /* ---------------------------------------- */
+
+  /**
+   * The darkness level adjustment mode.
+   * @type {number}
+   */
+  mode = foundry.data.regionBehaviors.AdjustDarknessLevelRegionBehaviorType.MODES.OVERRIDE;
+
+  /* ---------------------------------------- */
+
+  /**
+   * The darkness level modifier.
+   * @type {number}
+   */
+  modifier = 0;
+
+  /* ---------------------------------------- */
+
+  /**
+   * Current darkness level of this mesh.
+   * @type {number}
+   */
+  get darknessLevel() {
+    const M = foundry.data.regionBehaviors.AdjustDarknessLevelRegionBehaviorType.MODES;
+    switch ( this.mode ) {
+      case M.OVERRIDE: return this.modifier;
+      case M.BRIGHTEN: return canvas.environment.darknessLevel * (1 - this.modifier);
+      case M.DARKEN: return 1 - ((1 - canvas.environment.darknessLevel) * (1 - this.modifier));
+      default: throw new Error("Invalid mode");
+    }
+  }
+
+  /* ---------------------------------------- */
+
+  /** @inheritDoc */
+  _preRender(mesh, renderer) {
+    super._preRender(mesh, renderer);
+    const u = this.uniforms;
+    u.bottom = canvas.masks.depth.mapElevation(mesh.region.bottom);
+    u.top = canvas.masks.depth.mapElevation(mesh.region.top);
+    if ( !u.depthTexture ) u.depthTexture = canvas.masks.depth.renderTexture;
+  }
+}
+
+/* ---------------------------------------- */
+
+/**
+ * Render the RegionMesh with darkness level adjustments.
+ * @internal
+ * @ignore
+ */
+class AdjustDarknessLevelRegionShader extends AbstractDarknessLevelRegionShader {
+
+  /** @override */
+  static fragmentShader = `
+    precision ${PIXI.settings.PRECISION_FRAGMENT} float;
+
+    uniform sampler2D depthTexture;
+    uniform float darknessLevel;
+    uniform float top;
+    uniform float bottom;
+    uniform vec4 tintAlpha;
+    varying vec2 vScreenCoord;
+
+    void main() {
+      vec2 depthColor = texture2D(depthTexture, vScreenCoord).rg;
+      float depth = step(depthColor.g, top) * step(bottom, (254.5 / 255.0) - depthColor.r);
+      gl_FragColor = vec4(darknessLevel, 0.0, 0.0, 1.0) * tintAlpha * depth;
+    }
+  `;
+
+  /* ---------------------------------------- */
+
+  /** @inheritDoc */
+  static defaultUniforms = {
+    ...super.defaultUniforms,
+    darknessLevel: 0
+  };
+
+  /* ---------------------------------------- */
+
+  /** @inheritDoc */
+  _preRender(mesh, renderer) {
+    super._preRender(mesh, renderer);
+    this.uniforms.darknessLevel = this.darknessLevel;
+  }
+}
+
+/* ---------------------------------------- */
+
+/**
+ * Render the RegionMesh with darkness level adjustments.
+ * @internal
+ * @ignore
+ */
+class IlluminationDarknessLevelRegionShader extends AbstractDarknessLevelRegionShader {
+
+  /** @override */
+  static fragmentShader = `
+    precision ${PIXI.settings.PRECISION_FRAGMENT} float;
+
+    uniform sampler2D depthTexture;
+    uniform float top;
+    uniform float bottom;
+    uniform vec4 tintAlpha;
+    varying vec2 vScreenCoord;
+
+    void main() {
+      vec2 depthColor = texture2D(depthTexture, vScreenCoord).rg;
+      float depth = step(depthColor.g, top) * step(bottom, (254.5 / 255.0) - depthColor.r);
+      gl_FragColor = vec4(1.0) * tintAlpha * depth;
+    }
+  `;
+}