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Restore offscreen surface example, Add GPU/CPU reporting function.

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Change-Id: Ic360cef53aa22983e8b17a3488e97d6f28b27d97
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/288894
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Nathaniel Nifong <nifong@google.com>
This commit is contained in:
Nathaniel Nifong 2020-05-11 08:24:16 -04:00 committed by Skia Commit-Bot
parent baf8921806
commit ce1648f822
3 changed files with 13 additions and 3 deletions
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10
modules/canvaskit/canvaskit/extra.html
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@ -29,13 +29,15 @@
<h2> Paragraph </h2>
<canvas id=para1 width=600 height=600></canvas>
<h2> CanvasKit can serialize/deserialize .skp files</h2>
<canvas id=skp width=500 height=500></canvas>
<h2> 3D perspective transformations </h2>
<canvas id=camera3d width=500 height=500></canvas>
<h2> Use of offscreen surfaces </h2>
<canvas id=surfaces width=500 height=500></canvas>
<script type="text/javascript" src="/node_modules/canvaskit/bin/canvaskit.js"></script>
<script type="text/javascript" charset="utf-8">
@ -76,6 +78,8 @@
RTShaderAPI1(CanvasKit);
SkpExample(CanvasKit, skpData);
SurfaceAPI1(CanvasKit);
});
fetch(cdn + 'lego_loader.json').then((resp) => {
@ -242,10 +246,11 @@ const curves = {
console.error('Could not make surface');
return;
}
console.log('SurfaceAPI1 top surface type = '+surface.reportBackendType() );
const context = CanvasKit.currentContext();
const canvas = surface.getCanvas();
// create a subsurface as a temporary workspace.
//create a subsurface as a temporary workspace.
const subSurface = surface.makeSurface({
width: 50,
height: 50,
@ -257,6 +262,7 @@ const curves = {
console.error('Could not make subsurface');
return;
}
console.log('SurfaceAPI1 subSurface type = '+subSurface.reportBackendType() );
// draw a small "scene"
const paint = new CanvasKit.SkPaint();

5
modules/canvaskit/canvaskit_bindings.cpp
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@ -1463,7 +1463,10 @@ EMSCRIPTEN_BINDINGS(Skia) {
.function("makeSurface", optional_override([](SkSurface& self, SimpleImageInfo sii)->sk_sp<SkSurface> {
return self.makeSurface(toSkImageInfo(sii));
}), allow_raw_pointers())
.function("width", &SkSurface::width);
.function("width", &SkSurface::width)
.function("reportBackendType", optional_override([](SkSurface& self)->std::string {
return self.getCanvas()->getGrContext() == nullptr ? "CPU" : "GPU";
}));
#ifndef SK_NO_FONTS
class_<SkTextBlob>("SkTextBlob")

1
modules/canvaskit/externs.js
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@ -520,6 +520,7 @@ var CanvasKit = {
/** @return {CanvasKit.SkImage} */
makeImageSnapshot: function() {},
makeSurface: function() {},
reportBackendType: function() {},
grContext: {},
// private API