Skia Fiddle

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Width Height

check_box_outline_blank check_box Text Only [Use SkDebugf()]

check_box_outline_blank check_box sRGB

check_box_outline_blank check_box F16

check_box_outline_blank check_box Animation

check_box_outline_blank check_box Offscreen Render Target

Width Height Sample Count

check_box_outline_blank check_box Texturable

check_box_outline_blank check_box MipMap

This global is now defined:

GrBackendRenderTarget backEndRenderTarget;

GrBackendTexture backEndTextureRenderTarget;

Optional source image

check_box_outline_blank check_box MipMap

These globals are now defined:

SkBitmap source;
sk_sp<SkImage> image;
GrBackendTexture backEndTexture; // GPU Only.

Note:

Adding comments with SK_FOLD_START and SK_FOLD_END creates foldable code blocks.
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const SkScalar kLightHeight = 600;
const SkScalar kLightRadius = 800;
​
void DrawShadow(SkCanvas* canvas,
                const SkPath& path,
                SkColor color,
                float elevation,
                bool transparentOccluder,
                SkScalar dpr) {
  const SkScalar kAmbientAlpha = 0.039f;
  const SkScalar kSpotAlpha = 0.25f;
​
  uint32_t flags = transparentOccluder
                       ? SkShadowFlags::kTransparentOccluder_ShadowFlag
                       : SkShadowFlags::kNone_ShadowFlag;
  flags |= SkShadowFlags::kDirectionalLight_ShadowFlag;
  SkColor inAmbient = SkColorSetA(color, kAmbientAlpha * SkColorGetA(color));
  SkColor inSpot = SkColorSetA(color, kSpotAlpha * SkColorGetA(color));
  SkColor ambientColor, spotColor;
  SkShadowUtils::ComputeTonalColors(inAmbient, inSpot, &ambientColor,
                                    &spotColor);
  SkShadowUtils::DrawShadow(canvas, path, SkPoint3::Make(0, 0, dpr * elevation),
                            SkPoint3::Make(0, -1, 1),
                            kLightRadius / kLightHeight, ambientColor,
                            spotColor, flags);
}
​
void draw(SkCanvas* canvas) {
  SkPath path;
  path.addRoundRect({50, 50, 150, 150}, 10, 10);
  canvas->drawColor(SK_ColorYELLOW);
  DrawShadow(canvas, path, SK_ColorDKGRAY, 10, true, 1.0);
}