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-rw-r--r--beamer/viewer/screen/screen.js33
1 files changed, 29 insertions, 4 deletions
diff --git a/beamer/viewer/screen/screen.js b/beamer/viewer/screen/screen.js
index 3d95acd..4bebab4 100644
--- a/beamer/viewer/screen/screen.js
+++ b/beamer/viewer/screen/screen.js
@@ -47,9 +47,32 @@ class Screen {
47 }; 47 };
48 } 48 }
49 49
50 _getScreenOffsets(secondary, width, height) {
51 if (!secondary) return { xOffset: 0, yOffset: 0 };
52
53 const viewport = this.page.getViewport(1);
54 if (viewport.width > viewport.height)
55 return { xOffset: -width, yOffset: 0 };
56 else
57 return { xOffset: 0, yOffset: -height };
58 }
59
50 _getSlideSizeRatio() { 60 _getSlideSizeRatio() {
51 const viewport = this.page.getViewport(1); 61 const viewport = this.page.getViewport(1);
52 return (viewport.width / 2) / viewport.height; 62
63 if (viewport.width > viewport.height)
64 return (viewport.width / 2) / viewport.height;
65 else
66 return viewport.width / (viewport.height / 2);
67 }
68
69 _getScaleFactor(width, height) {
70 const viewport = this.page.getViewport(1);
71
72 if (viewport.width > viewport.height)
73 return height / viewport.height;
74 else
75 return width / viewport.width;
53 } 76 }
54 77
55 _newCanvas(width, height, xOffset, yOffset) { 78 _newCanvas(width, height, xOffset, yOffset) {
@@ -86,9 +109,11 @@ class Screen {
86 109
87 const screenRatio = this._getSlideSizeRatio(); 110 const screenRatio = this._getSlideSizeRatio();
88 const { width, height } = this._getScreenSize(screenRatio); 111 const { width, height } = this._getScreenSize(screenRatio);
89 const scaleFactor = height / this.page.getViewport(1).height; 112 const scaleFactor = this._getScaleFactor(width, height);
90 const xOffset = this.secondary ? -width : 0; 113 const { xOffset, yOffset } =
91 const { canvas, context } = this._newCanvas(width, height, xOffset, 0); 114 this._getScreenOffsets(this.secondary, width, height);
115 const { canvas, context } =
116 this._newCanvas(width, height, xOffset, yOffset);
92 this._render(canvas, context, scaleFactor); 117 this._render(canvas, context, scaleFactor);
93 } 118 }
94} 119}