diff options
Diffstat (limited to 'platform/javascript')
| -rw-r--r-- | platform/javascript/detect.py | 10 | ||||
| -rw-r--r-- | platform/javascript/engine.js | 10 |
2 files changed, 15 insertions, 5 deletions
diff --git a/platform/javascript/detect.py b/platform/javascript/detect.py index 8472c3ccab..8c7a904bca 100644 --- a/platform/javascript/detect.py +++ b/platform/javascript/detect.py @@ -49,8 +49,14 @@ def configure(env): ## Build type if (env["target"] == "release"): - env.Append(CCFLAGS=['-O3']) - env.Append(LINKFLAGS=['-O3']) + # Use -Os to prioritize optimizing for reduced file size. This is + # particularly valuable for the web platform because it directly + # decreases download time. + # -Os reduces file size by around 5 MiB over -O3. -Oz only saves about + # 100 KiB over -Os, which does not justify the negative impact on + # run-time performance. + env.Append(CCFLAGS=['-Os']) + env.Append(LINKFLAGS=['-Os']) elif (env["target"] == "release_debug"): env.Append(CCFLAGS=['-O2', '-DDEBUG_ENABLED']) diff --git a/platform/javascript/engine.js b/platform/javascript/engine.js index dc4bdc7efb..bca1851f40 100644 --- a/platform/javascript/engine.js +++ b/platform/javascript/engine.js @@ -138,13 +138,17 @@ } var actualCanvas = this.rtenv.canvas; - var context = false; + var testContext = false; + var testCanvas; try { - context = actualCanvas.getContext('webgl2') || actualCanvas.getContext('experimental-webgl2'); + testCanvas = document.createElement('canvas'); + testContext = testCanvas.getContext('webgl2') || testCanvas.getContext('experimental-webgl2'); } catch (e) {} - if (!context) { + if (!testContext) { throw new Error("WebGL 2 not available"); } + testCanvas = null; + testContext = null; // canvas can grab focus on click if (actualCanvas.tabIndex < 0) { |