Generic sampler used with bitmap data. More...
#import <ChipmunkImageSampler.h>
Inherits ChipmunkAbstractSampler.
Inherited by ChipmunkCGContextSampler.
Public Member Functions | |
| (id) | - initWithWidth:height:stride:bytesPerPixel:component:flip:pixelData: |
| Init a sampler from bitmap data. | |
| (void) | - setBorderRepeat |
| Set the border of the bitmap to repeat the edge pixels. | |
| (void) | - setBorderValue: |
| Set the border of the bitmap to be a specific value. | |
| (ChipmunkPolylineSet *) | - marchAllWithBorder:hard: |
| March the entire image. | |
Properties | |
| NSUInteger | width |
| Width of the bitmap in pixels. | |
| NSUInteger | height |
| Height of the bitmap in pixels. | |
| NSUInteger | bytesPerPixel |
| Bytes per pixel of the bitmap. (ex: RGBA8888 would be 4). | |
| NSUInteger | component |
| Zero-based ndex of the component to sample. (ex: alpha of RGBA would be 3). | |
| NSData * | pixelData |
| NSData object holding the pixel data. | |
| cpBB | outputRect |
| Rect that the image maps to. | |
Generic sampler used with bitmap data.
Currently limited to 8 bit per component data. Bitmap samplers currently provide no filtering, but could be easily extended to do so.
| - (id) initWithWidth: | (NSUInteger) | width | ||
| height: | (NSUInteger) | height | ||
| stride: | (NSUInteger) | stride | ||
| bytesPerPixel: | (NSUInteger) | bytesPerPixel | ||
| component: | (NSUInteger) | component | ||
| flip: | (bool) | flip | ||
| pixelData: | (NSData *) | pixelData | ||
Init a sampler from bitmap data.
Stride refers to the length of a row of pixels in bytes. (Generally just w*h*bytesPerPixel unless there is padding) Image must use one byte per component, but can have any number of components. component refers to the 0-based index of the component to sample. (i.e. 3 would sample the alpha in an RGBA bitmap) flip allows you to flip the image vertically to match how it migh be drawn. pixelData can be either a NSData or NSMutableData (i.e. for deformable terrain) that contains the bitmap data.
- (cpBB) outputRect [read, write, assign] |
Rect that the image maps to.
Defaults to (0.5, 0.5, width - 0.5, height - 0.5) so that pixel centers will be cleanly sampled.
1.7.1
