BGRABitmap AggPas: what changed

Revision 3 to 4. Removed lines have a minus sign; added lines have a plus sign.

Old	New		Line
1	1		Here is a series of projects demonstrating advanced capabilities in [[BGRABitmap]] similar to [AggPas](http://www.crossgl.com/aggpas/)
2	2
3	3		The projects are in the bgraaggtest folder in [BGRABitmap repository](https://github.com/bgrabitmap/bgrabitmap/tree/master/test/bgraaggtest)
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5	5		### Antialiasing demo (AA demo)
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7	7		This program shows how the gamma factor affects how antialiasing is rendered.
8	8
9		-	~~<img src="aa_demo.png" title="aa_demo.png" width="400" />~~
	9	+	![](/wiki-images/8/82/Aa_demo.png)
10	10
11	11		### Alpha gradient
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13	13		This program shows how to apply a complex alpha mask based on a custom gradient. See [[BGRABitmap tutorial 11\|Tutorial 11]] on how to create a custom scanner.
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15		-	~~<img src="alpha_gradient.png" title="alpha_gradient.png" width="400" />~~
	15	+	![](/wiki-images/b/b6/Alpha_gradient.png)
16	16
17	17		### Blur
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19	19		This program shows the different types of blurs and their speed.
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21		-	~~<img src="blur.png" title="blur.png" width="400" />~~
	21	+	![](/wiki-images/f/f4/Blur.png)
22	22
23	23		### Bézier like splines (B-spline)
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25	25		This program to demonstrate various kind of spline interpolations and how to use a path cursor.
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27		-	~~<img src="bspline.png" title="bspline.png" width="400" />~~
	27	+	![](/wiki-images/6/6a/Bspline.png)
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29	29		The TBGRAPath objet takes a series of instructions to draw a path in a similar way as with HTML canvas. To define a polygon, you can call `moveTo(x,y)` to define the first point, and then `lineTo(x,y)` for each subsequent point. Finally you can call `closePath` to end the polygon.
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31	31		Once the path is created, you can draw it and fill it, either using its `stroke` and `fill` functions, or by calling `TBGRABitmap.DrawPath` or `FillPath` functions.
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33	33		Do draw a symbol along the path, you can use `TBGRAPath.CreateCursor` function to create a cursor. The cursor has `MoveForward` and `MoveBackward` for example to move along the path. They return the actual moved length, which will be 0 when the end of the path has been reached.
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35	35		The `CurrentCoordinate` property contains the current position and the `CurrentTangent` contains a unit vector to align the shape.
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37	37		### Distortions
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39	39		This program shows how to apply a distortion to an image or a gradient.
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41		-	~~<img src="distortions.png" title="distortions.png" width="400" />~~
	41	+	![](/wiki-images/8/80/Distortions.png)
42	42
43	43		### Gouraud shading
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45	45		This program demonstrates how to do a multi-polygon Gouraud shading.
46	46
47		-	~~<img src="gouraud.png" title="gouraud.png" width="400" />~~
	47	+	![](/wiki-images/e/e3/Gouraud.png)
48	48
49	49		### Image filters 2
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51	51		This program shows the various interpolation filters that can be used when resampling.
52	52
53		-	~~<img src="image_filters2.png" title="image_filters2.png" width="400" />~~
	53	+	![](/wiki-images/7/78/Image_filters2.png)
54	54
55	55		### Image perspective
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57	57		This program demonstrates the different ways of applying a texture to a quad.
58	58
59		-	~~<img src="image_perspective.png" title="image_perspective.png" width="400" />~~
	59	+	![](/wiki-images/f/f4/Image_perspective.png)
60	60
61	61		---
62	62		From the Free Pascal wiki, page "BGRABitmap AggPas", as it stood on 2023-05-21 after a change by Circular, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).

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