diff options
Diffstat (limited to 'skia/ext')
| -rw-r--r-- | skia/ext/skia_utils_ios.mm | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/skia/ext/skia_utils_ios.mm b/skia/ext/skia_utils_ios.mm index 9d4c14a..a52a998 100644 --- a/skia/ext/skia_utils_ios.mm +++ b/skia/ext/skia_utils_ios.mm @@ -47,6 +47,12 @@ SkBitmap UIImageToSkBitmap(UIImage* image, CGSize size, bool is_opaque) { if (!context) return bitmap; + // We need to invert the y-axis of the canvas so that Core Graphics drawing + // happens right-side up. Skia has an upper-left origin and CG has a lower- + // left one. + CGContextScaleCTM(context, 1.0, -1.0); + CGContextTranslateCTM(context, 0, -size.height); + // UIGraphicsPushContext be called from the main thread. // TODO(rohitrao): We can use CG to make this thread safe, but the mac code // calls setCurrentContext, so it's similarly limited to the main thread. |