| 1 | import { ExtensionType, extensions } from '@pixi/extensions';
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| 2 | import { Matrix } from '@pixi/math';
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| 3 |
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| 4 | class ProjectionSystem {
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| 5 | constructor(renderer) {
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| 6 | this.renderer = renderer;
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| 7 | this.destinationFrame = null;
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| 8 | this.sourceFrame = null;
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| 9 | this.defaultFrame = null;
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| 10 | this.projectionMatrix = new Matrix();
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| 11 | this.transform = null;
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| 12 | }
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| 13 | update(destinationFrame, sourceFrame, resolution, root) {
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| 14 | this.destinationFrame = destinationFrame || this.destinationFrame || this.defaultFrame;
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| 15 | this.sourceFrame = sourceFrame || this.sourceFrame || destinationFrame;
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| 16 | this.calculateProjection(this.destinationFrame, this.sourceFrame, resolution, root);
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| 17 | if (this.transform) {
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| 18 | this.projectionMatrix.append(this.transform);
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| 19 | }
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| 20 | const renderer = this.renderer;
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| 21 | renderer.globalUniforms.uniforms.projectionMatrix = this.projectionMatrix;
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| 22 | renderer.globalUniforms.update();
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| 23 | if (renderer.shader.shader) {
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| 24 | renderer.shader.syncUniformGroup(renderer.shader.shader.uniforms.globals);
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| 25 | }
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| 26 | }
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| 27 | calculateProjection(_destinationFrame, sourceFrame, _resolution, root) {
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| 28 | const pm = this.projectionMatrix;
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| 29 | const sign = !root ? 1 : -1;
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| 30 | pm.identity();
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| 31 | pm.a = 1 / sourceFrame.width * 2;
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| 32 | pm.d = sign * (1 / sourceFrame.height * 2);
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| 33 | pm.tx = -1 - sourceFrame.x * pm.a;
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| 34 | pm.ty = -sign - sourceFrame.y * pm.d;
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| 35 | }
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| 36 | setTransform(_matrix) {
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| 37 | }
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| 38 | destroy() {
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| 39 | this.renderer = null;
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| 40 | }
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| 41 | }
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| 42 | ProjectionSystem.extension = {
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| 43 | type: ExtensionType.RendererSystem,
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| 44 | name: "projection"
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| 45 | };
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| 46 | extensions.add(ProjectionSystem);
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| 47 |
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| 48 | export { ProjectionSystem };
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| 49 |
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