BGRABitmap AggPas: what changed
Revision 0 to 1. Removed lines have a minus sign; added lines have a plus sign.
Title: BGRABitmap AggPas
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| 1 | + | Here is a series of projects demonstrating advanced capabilities in [[BGRABitmap]] similar to [AggPas](http://www.crossgl.com/aggpas/) | |
| 2 | + | ||
| 3 | + | The projects are in the <b>bgraaggtest</b> folder in [BGRABitmap repository](https://github.com/bgrabitmap/bgrabitmap/tree/master/test/bgraaggtest) | |
| 4 | + | ||
| 5 | + | ### Antialiasing demo (AA demo) | |
| 6 | + | ||
| 7 | + | This program shows how the gamma factor affects how antialiasing is rendered. | |
| 8 | + | ||
| 9 | + | <figure> | |
| 10 | + | <img src="aa_demo.png" title="aa_demo.png" width="400" /> | |
| 11 | + | <figcaption>aa_demo.png</figcaption> | |
| 12 | + | </figure> | |
| 13 | + | ||
| 14 | + | ### Alpha gradient | |
| 15 | + | ||
| 16 | + | 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. | |
| 17 | + | ||
| 18 | + | <figure> | |
| 19 | + | <img src="alpha_gradient.png" title="alpha_gradient.png" width="400" /> | |
| 20 | + | <figcaption>alpha_gradient.png</figcaption> | |
| 21 | + | </figure> | |
| 22 | + | ||
| 23 | + | ### Blur | |
| 24 | + | ||
| 25 | + | This program shows the different types of blurs and their speed. | |
| 26 | + | ||
| 27 | + | <figure> | |
| 28 | + | <img src="blur.png" title="blur.png" width="400" /> | |
| 29 | + | <figcaption>blur.png</figcaption> | |
| 30 | + | </figure> | |
| 31 | + | ||
| 32 | + | ### Bézier like splines (B-spline) | |
| 33 | + | ||
| 34 | + | This program to demonstrate various kind of spline interpolations and how to use a path cursor. | |
| 35 | + | ||
| 36 | + | <figure> | |
| 37 | + | <img src="bspline.png" title="bspline.png" width="400" /> | |
| 38 | + | <figcaption>bspline.png</figcaption> | |
| 39 | + | </figure> | |
| 40 | + | ||
| 41 | + | 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. | |
| 42 | + | ||
| 43 | + | 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. | |
| 44 | + | ||
| 45 | + | 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. | |
| 46 | + | ||
| 47 | + | The `CurrentCoordinate` property contains the current position and the `CurrentTangent` contains a unit vector to align the shape. | |
| 48 | + | ||
| 49 | + | ### Distortions | |
| 50 | + | ||
| 51 | + | This program shows how to apply a distortion to an image or a gradient. | |
| 52 | + | ||
| 53 | + | <figure> | |
| 54 | + | <img src="distortions.png" title="distortions.png" width="400" /> | |
| 55 | + | <figcaption>distortions.png</figcaption> | |
| 56 | + | </figure> | |
| 57 | + | ||
| 58 | + | ### Gouraud shading | |
| 59 | + | ||
| 60 | + | This program demonstrates how to do a multi-polygon Gouraud shading. | |
| 61 | + | ||
| 62 | + | <figure> | |
| 63 | + | <img src="gouraud.png" title="gouraud.png" width="400" /> | |
| 64 | + | <figcaption>gouraud.png</figcaption> | |
| 65 | + | </figure> | |
| 66 | + | ||
| 67 | + | ### Image filters 2 | |
| 68 | + | ||
| 69 | + | This program shows the various interpolation filters that can be used when resampling. | |
| 70 | + | ||
| 71 | + | <figure> | |
| 72 | + | <img src="image_filters2.png" title="image_filters2.png" width="400" /> | |
| 73 | + | <figcaption>image_filters2.png</figcaption> | |
| 74 | + | </figure> | |
| 75 | + | ||
| 76 | + | ### Image perspective | |
| 77 | + | ||
| 78 | + | This program demonstrates the different ways of applying a texture to a quad. | |
| 79 | + | ||
| 80 | + | <figure> | |
| 81 | + | <img src="image_perspective.png" title="image_perspective.png" width="400" /> | |
| 82 | + | <figcaption>image_perspective.png</figcaption> | |
| 83 | + | </figure> | |
| 84 | + | ||
| 85 | + | --- | |
| 86 | + | *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).* |