diff options
| -rw-r--r-- | docs/SkBitmap_Reference.bmh | 81 | ||||
| -rw-r--r-- | site/user/api/SkBitmap_Reference.md | 2 | ||||
| -rw-r--r-- | site/user/api/catalog.htm | 4 |
3 files changed, 45 insertions, 42 deletions
diff --git a/docs/SkBitmap_Reference.bmh b/docs/SkBitmap_Reference.bmh index 353d244976..78b527aa2b 100644 --- a/docs/SkBitmap_Reference.bmh +++ b/docs/SkBitmap_Reference.bmh @@ -640,16 +640,16 @@ Returns zero if colorType( is kUnknown_SkColorType. bitmap.bytesPerPixel()); } #StdOut -color: kUnknown_SkColorType bytesPerPixel: 0
-color: kAlpha_8_SkColorType bytesPerPixel: 1
-color: kRGB_565_SkColorType bytesPerPixel: 2
-color: kARGB_4444_SkColorType bytesPerPixel: 2
-color: kRGBA_8888_SkColorType bytesPerPixel: 4
-color: kRGB_888x_SkColorType bytesPerPixel: 4
-color: kBGRA_8888_SkColorType bytesPerPixel: 4
-color: kRGBA_1010102_SkColorType bytesPerPixel: 4
-color: kRGB_101010x_SkColorType bytesPerPixel: 4
-color: kGray_8_SkColorType bytesPerPixel: 1
+color: kUnknown_SkColorType bytesPerPixel: 0 +color: kAlpha_8_SkColorType bytesPerPixel: 1 +color: kRGB_565_SkColorType bytesPerPixel: 2 +color: kARGB_4444_SkColorType bytesPerPixel: 2 +color: kRGBA_8888_SkColorType bytesPerPixel: 4 +color: kRGB_888x_SkColorType bytesPerPixel: 4 +color: kBGRA_8888_SkColorType bytesPerPixel: 4 +color: kRGBA_1010102_SkColorType bytesPerPixel: 4 +color: kRGB_101010x_SkColorType bytesPerPixel: 4 +color: kGray_8_SkColorType bytesPerPixel: 1 color: kRGBA_F16_SkColorType bytesPerPixel: 8 ## ## @@ -710,16 +710,16 @@ Returns zero for kUnknown_SkColorType. bitmap.shiftPerPixel()); } #StdOut -color: kUnknown_SkColorType shiftPerPixel: 0
-color: kAlpha_8_SkColorType shiftPerPixel: 0
-color: kRGB_565_SkColorType shiftPerPixel: 1
-color: kARGB_4444_SkColorType shiftPerPixel: 1
-color: kRGBA_8888_SkColorType shiftPerPixel: 2
-color: kRGB_888x_SkColorType shiftPerPixel: 2
-color: kBGRA_8888_SkColorType shiftPerPixel: 2
-color: kRGBA_1010102_SkColorType shiftPerPixel: 2
-color: kRGB_101010x_SkColorType shiftPerPixel: 2
-color: kGray_8_SkColorType shiftPerPixel: 0
+color: kUnknown_SkColorType shiftPerPixel: 0 +color: kAlpha_8_SkColorType shiftPerPixel: 0 +color: kRGB_565_SkColorType shiftPerPixel: 1 +color: kARGB_4444_SkColorType shiftPerPixel: 1 +color: kRGBA_8888_SkColorType shiftPerPixel: 2 +color: kRGB_888x_SkColorType shiftPerPixel: 2 +color: kBGRA_8888_SkColorType shiftPerPixel: 2 +color: kRGBA_1010102_SkColorType shiftPerPixel: 2 +color: kRGB_101010x_SkColorType shiftPerPixel: 2 +color: kGray_8_SkColorType shiftPerPixel: 0 color: kRGBA_F16_SkColorType shiftPerPixel: 3 ## ## @@ -3287,25 +3287,28 @@ Pixel_Ref. Sets offset to top-left position for dst for alignment with Bitmap; #Bug 7103 #Example #Height 160 - SkBitmap alpha, bitmap; - bitmap.allocN32Pixels(100, 100); - SkCanvas offscreen(bitmap); - offscreen.clear(0); - SkPaint paint; - paint.setAntiAlias(true); - paint.setColor(SK_ColorBLUE); - paint.setStyle(SkPaint::kStroke_Style); - paint.setStrokeWidth(20); - offscreen.drawCircle(50, 50, 39, paint); - offscreen.flush(); - const SkScalar kBlurSigma = SkBlurMaskFilter::ConvertRadiusToSigma(SkIntToScalar(25)); - paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle, kBlurSigma, - SkBlurMaskFilter::kHighQuality_BlurFlag)); - SkIPoint offset; - bitmap.extractAlpha(&alpha, &paint, &offset); - paint.setColor(SK_ColorRED); - canvas->drawBitmap(bitmap, 0, -offset.fY, &paint); - canvas->drawBitmap(alpha, 100 + offset.fX, 0, &paint); + auto radiusToSigma = [](SkScalar radius) -> SkScalar {
+ static const SkScalar kBLUR_SIGMA_SCALE = 0.57735f;
+ return radius > 0 ? kBLUR_SIGMA_SCALE * radius + 0.5f : 0.0f;
+ };
+ SkBitmap alpha, bitmap;
+ bitmap.allocN32Pixels(100, 100);
+ SkCanvas offscreen(bitmap);
+ offscreen.clear(0);
+ SkPaint paint;
+ paint.setAntiAlias(true);
+ paint.setColor(SK_ColorBLUE);
+ paint.setStyle(SkPaint::kStroke_Style);
+ paint.setStrokeWidth(20);
+ offscreen.drawCircle(50, 50, 39, paint);
+ offscreen.flush();
+ paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle, radiusToSigma(25),
+ SkBlurMaskFilter::kHighQuality_BlurFlag));
+ SkIPoint offset;
+ bitmap.extractAlpha(&alpha, &paint, &offset);
+ paint.setColor(SK_ColorRED);
+ canvas->drawBitmap(bitmap, 0, -offset.fY, &paint);
+ canvas->drawBitmap(alpha, 100 + offset.fX, 0, &paint);
## #SeeAlso extractSubset diff --git a/site/user/api/SkBitmap_Reference.md b/site/user/api/SkBitmap_Reference.md index 437b4cc7ce..999460ca52 100644 --- a/site/user/api/SkBitmap_Reference.md +++ b/site/user/api/SkBitmap_Reference.md @@ -3518,7 +3518,7 @@ true if <a href="undocumented#Alpha">Alpha</a> layer was constructed in <a href= ### Example -<div><fiddle-embed name="e122936b119f20098aace454c2105a12"></fiddle-embed></div> +<div><fiddle-embed name="c102065eea5c3f109fdcad3f0e269ce5"></fiddle-embed></div> ### See Also diff --git a/site/user/api/catalog.htm b/site/user/api/catalog.htm index 868f0fa5a0..261f7d855c 100644 --- a/site/user/api/catalog.htm +++ b/site/user/api/catalog.htm @@ -3766,10 +3766,10 @@ "name": "SkBitmap::extractAlpha" }, "SkBitmap_extractAlpha_2": { - "code": "void draw(SkCanvas* canvas) {\n SkBitmap alpha, bitmap;\n bitmap.allocN32Pixels(100, 100);\n SkCanvas offscreen(bitmap);\n offscreen.clear(0);\n SkPaint paint;\n paint.setAntiAlias(true);\n paint.setColor(SK_ColorBLUE);\n paint.setStyle(SkPaint::kStroke_Style);\n paint.setStrokeWidth(20);\n offscreen.drawCircle(50, 50, 39, paint);\n offscreen.flush();\n const SkScalar kBlurSigma = SkBlurMaskFilter::ConvertRadiusToSigma(SkIntToScalar(25));\n paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle, kBlurSigma,\n SkBlurMaskFilter::kHighQuality_BlurFlag));\n SkIPoint offset;\n bitmap.extractAlpha(&alpha, &paint, &offset);\n paint.setColor(SK_ColorRED);\n canvas->drawBitmap(bitmap, 0, -offset.fY, &paint);\n canvas->drawBitmap(alpha, 100 + offset.fX, 0, &paint);\n}", + "code": "void draw(SkCanvas* canvas) {\n auto radiusToSigma = [](SkScalar radius) -> SkScalar {\n static const SkScalar kBLUR_SIGMA_SCALE = 0.57735f;\n return radius > 0 ? kBLUR_SIGMA_SCALE * radius + 0.5f : 0.0f;\n };\n SkBitmap alpha, bitmap;\n bitmap.allocN32Pixels(100, 100);\n SkCanvas offscreen(bitmap);\n offscreen.clear(0);\n SkPaint paint;\n paint.setAntiAlias(true);\n paint.setColor(SK_ColorBLUE);\n paint.setStyle(SkPaint::kStroke_Style);\n paint.setStrokeWidth(20);\n offscreen.drawCircle(50, 50, 39, paint);\n offscreen.flush();\n paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle, radiusToSigma(25),\n SkBlurMaskFilter::kHighQuality_BlurFlag));\n SkIPoint offset;\n bitmap.extractAlpha(&alpha, &paint, &offset);\n paint.setColor(SK_ColorRED);\n canvas->drawBitmap(bitmap, 0, -offset.fY, &paint);\n canvas->drawBitmap(alpha, 100 + offset.fX, 0, &paint);\n}", "width": 256, "height": 160, - "hash": "e122936b119f20098aace454c2105a12", + "hash": "c102065eea5c3f109fdcad3f0e269ce5", "file": "SkBitmap_Reference", "name": "SkBitmap::extractAlpha_2" }, |