TechQA.

Question

How to create a CGColor in an index based CGColorSpace?

score 12 · Answer 1 · 2024-03-01T13:17:57.023000

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How to create a CGColor in an index based CGColorSpace?

12 views Asked by Scylurus At 01 March 2024 at 13:17

score 55 · Answer 2 · 2023-12-15T13:22:59.147000

The image created by CGContext.makeImage is different from the original text

55 views Asked by Mandroid At 15 December 2023 at 13:22

score 40 · Answer 3 · 2022-06-10T16:54:31.050000

Affect the final alpha of combined draw calls

40 views Asked by johnbakers At 10 June 2022 at 16:54

score 97 · Answer 4 · 2022-01-19T14:24:05.343000

CGGradientCreateWithColors / CGContextDrawLinearGradient - formula to calculate intermediate colour combinations?

97 views Asked by djmlewis At 19 January 2022 at 14:24

score 150 · Answer 5 · 2022-01-15T19:21:22.873000

Significance of kCGImageAlphaPremultipliedLast and kCGBitmapByteOrder32Big in core graphics

150 views Asked by Muthukumar At 15 January 2022 at 19:21

score 57 · Answer 6 · 2021-01-05T08:09:41.687000

What is the context parameter to CGContextDrawLayerInRect()?

57 views Asked by tml At 05 January 2021 at 08:09

score 357 · Answer 7 · 2020-12-31T20:41:46.653000

How can I speed up displaying bitmap graphics with Swift and an image buffer?

357 views Asked by rikitikitavi At 31 December 2020 at 20:41

score 373 · Answer 8 · 2020-10-26T07:52:26.953000

Why the max value of cornerRadius is not half of the rectangle? Drawing roundedRect with UIBezierPath in swift

373 views Asked by tanxiuguang At 26 October 2020 at 07:52

score 237 · Answer 9 · 2020-09-25T20:05:20.723000

Continuously Redrawing a Path with Updated Data

237 views Asked by KeithB At 25 September 2020 at 20:05

score 175 · Answer 10 · 2020-04-26T12:24:19.890000

Create an Objective-C Block in plain C++

175 views Asked by Raynigon At 26 April 2020 at 12:24

score 164 · Answer 11 · 2020-03-27T09:07:08.290000

CGContext fill(_ rect: CGRect) can not match the expected result

164 views Asked by nenseso At 27 March 2020 at 09:07

score 681 · Answer 12 · 2020-03-21T06:20:04.610000

Quartz 2D implementing html5 canvas globalCompositeOperation

681 views Asked by Joel de Guzman At 21 March 2020 at 06:20

score 99 · Answer 13 · 2019-12-24T01:07:56.513000

Swap color channels on UIImage from transparent png with quartz 2D

99 views Asked by Ecuador At 24 December 2019 at 01:07

score 424 · Answer 14 · 2019-04-09T12:23:10.273000

Does CGImage support 16 bits per channel?

424 views Asked by Kartick Vaddadi At 09 April 2019 at 12:23

score 421 · Answer 15 · 2019-03-14T14:53:34.073000

Core graphics draw concentric circles and fill the gap between them

421 views Asked by Deepak Sharma At 14 March 2019 at 14:53

score 1202 · Answer 16 · 2019-03-14T10:57:56.790000

CGContext draw rotated rectangles

1.2k views Asked by Deepak Sharma At 14 March 2019 at 10:57

score 1295 · Answer 17 · 2019-01-21T14:09:48.757000

Objective C - Create PDF (Mac OSX / Cocoa)

1.2k views Asked by pachachoALO At 21 January 2019 at 14:09

score 681 · Answer 18 · 2017-12-02T21:10:31.463000

CTFontDrawGlyphs draws at incorrect position

681 views Asked by MassMover At 02 December 2017 at 21:10

score 187 · Answer 19 · 2017-09-29T03:34:34.713000

How to understand the math behind the CTM(current transformation matrix)?

187 views Asked by Meiliang Dong At 29 September 2017 at 03:34

score 1081 · Answer 20 · 2017-07-20T13:49:24.727000

How to get corner points of Rect rotated in Core Graphics?

1k views Asked by iAviator At 20 July 2017 at 13:49

TechQA.

List Question

How to create a CGColor in an index based CGColorSpace?

The image created by CGContext.makeImage is different from the original text

Affect the final alpha of combined draw calls

CGGradientCreateWithColors / CGContextDrawLinearGradient - formula to calculate intermediate colour combinations?

Significance of kCGImageAlphaPremultipliedLast and kCGBitmapByteOrder32Big in core graphics

What is the context parameter to CGContextDrawLayerInRect()?

How can I speed up displaying bitmap graphics with Swift and an image buffer?

Why the max value of cornerRadius is not half of the rectangle? Drawing roundedRect with UIBezierPath in swift

Continuously Redrawing a Path with Updated Data

Create an Objective-C Block in plain C++

CGContext fill(_ rect: CGRect) can not match the expected result

Quartz 2D implementing html5 canvas globalCompositeOperation

Swap color channels on UIImage from transparent png with quartz 2D

Does CGImage support 16 bits per channel?

Core graphics draw concentric circles and fill the gap between them

CGContext draw rotated rectangles

Objective C - Create PDF (Mac OSX / Cocoa)

CTFontDrawGlyphs draws at incorrect position

How to understand the math behind the CTM(current transformation matrix)?

How to get corner points of Rect rotated in Core Graphics?

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