sdfsdfs

node_modules/pixi.js/lib/rendering/renderers/gl/GlBackBufferSystem.js

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+'use strict';
+
+var Extensions = require('../../../extensions/Extensions.js');
+var warn = require('../../../utils/logging/warn.js');
+var Geometry = require('../shared/geometry/Geometry.js');
+var Shader = require('../shared/shader/Shader.js');
+var State = require('../shared/state/State.js');
+var TextureSource = require('../shared/texture/sources/TextureSource.js');
+var Texture = require('../shared/texture/Texture.js');
+var GlProgram = require('./shader/GlProgram.js');
+
+"use strict";
+const bigTriangleGeometry = new Geometry.Geometry({
+  attributes: {
+    aPosition: [
+      -1,
+      -1,
+      // Bottom left corner
+      3,
+      -1,
+      // Bottom right corner, extending beyond right edge
+      -1,
+      3
+      // Top left corner, extending beyond top edge
+    ]
+  }
+});
+const _GlBackBufferSystem = class _GlBackBufferSystem {
+  constructor(renderer) {
+    /** if true, the back buffer is used */
+    this.useBackBuffer = false;
+    this._useBackBufferThisRender = false;
+    this._renderer = renderer;
+  }
+  init(options = {}) {
+    const { useBackBuffer, antialias } = { ..._GlBackBufferSystem.defaultOptions, ...options };
+    this.useBackBuffer = useBackBuffer;
+    this._antialias = antialias;
+    if (!this._renderer.context.supports.msaa) {
+      warn.warn("antialiasing, is not supported on when using the back buffer");
+      this._antialias = false;
+    }
+    this._state = State.State.for2d();
+    const bigTriangleProgram = new GlProgram.GlProgram({
+      vertex: `
+                attribute vec2 aPosition;
+                out vec2 vUv;
+
+                void main() {
+                    gl_Position = vec4(aPosition, 0.0, 1.0);
+
+                    vUv = (aPosition + 1.0) / 2.0;
+
+                    // flip dem UVs
+                    vUv.y = 1.0 - vUv.y;
+                }`,
+      fragment: `
+                in vec2 vUv;
+                out vec4 finalColor;
+
+                uniform sampler2D uTexture;
+
+                void main() {
+                    finalColor = texture(uTexture, vUv);
+                }`,
+      name: "big-triangle"
+    });
+    this._bigTriangleShader = new Shader.Shader({
+      glProgram: bigTriangleProgram,
+      resources: {
+        uTexture: Texture.Texture.WHITE.source
+      }
+    });
+  }
+  /**
+   * This is called before the RenderTargetSystem is started. This is where
+   * we replace the target with the back buffer if required.
+   * @param options - The options for this render.
+   */
+  renderStart(options) {
+    const renderTarget = this._renderer.renderTarget.getRenderTarget(options.target);
+    this._useBackBufferThisRender = this.useBackBuffer && !!renderTarget.isRoot;
+    if (this._useBackBufferThisRender) {
+      const renderTarget2 = this._renderer.renderTarget.getRenderTarget(options.target);
+      this._targetTexture = renderTarget2.colorTexture;
+      options.target = this._getBackBufferTexture(renderTarget2.colorTexture);
+    }
+  }
+  renderEnd() {
+    this._presentBackBuffer();
+  }
+  _presentBackBuffer() {
+    const renderer = this._renderer;
+    renderer.renderTarget.finishRenderPass();
+    if (!this._useBackBufferThisRender)
+      return;
+    renderer.renderTarget.bind(this._targetTexture, false);
+    this._bigTriangleShader.resources.uTexture = this._backBufferTexture.source;
+    renderer.encoder.draw({
+      geometry: bigTriangleGeometry,
+      shader: this._bigTriangleShader,
+      state: this._state
+    });
+  }
+  _getBackBufferTexture(targetSourceTexture) {
+    this._backBufferTexture = this._backBufferTexture || new Texture.Texture({
+      source: new TextureSource.TextureSource({
+        width: targetSourceTexture.width,
+        height: targetSourceTexture.height,
+        resolution: targetSourceTexture._resolution,
+        antialias: this._antialias
+      })
+    });
+    this._backBufferTexture.source.resize(
+      targetSourceTexture.width,
+      targetSourceTexture.height,
+      targetSourceTexture._resolution
+    );
+    return this._backBufferTexture;
+  }
+  /** destroys the back buffer */
+  destroy() {
+    if (this._backBufferTexture) {
+      this._backBufferTexture.destroy();
+      this._backBufferTexture = null;
+    }
+  }
+};
+/** @ignore */
+_GlBackBufferSystem.extension = {
+  type: [
+    Extensions.ExtensionType.WebGLSystem
+  ],
+  name: "backBuffer",
+  priority: 1
+};
+/** default options for the back buffer system */
+_GlBackBufferSystem.defaultOptions = {
+  /** if true will use the back buffer where required */
+  useBackBuffer: false
+};
+let GlBackBufferSystem = _GlBackBufferSystem;
+
+exports.GlBackBufferSystem = GlBackBufferSystem;
+//# sourceMappingURL=GlBackBufferSystem.js.map