An implementation of ImageSourceBase where the data is backed by a c_array<const u8vec4> data. More...
#include <image.hpp>
Public Member Functions | |
| ImageSourceCArray (uvec2 dimensions, c_array< const c_array< const u8vec4 > > pdata, enum Image::format_t fmt) | |
| virtual bool | all_same_color (ivec2 location, int square_size, u8vec4 *dst) const |
| virtual void | fetch_texels (unsigned int mimpap_level, ivec2 location, unsigned int w, unsigned int h, c_array< u8vec4 > dst) const |
| virtual enum Image::format_t | format (void) const |
| virtual unsigned int | number_levels (void) const |
Detailed Description
An implementation of ImageSourceBase where the data is backed by a c_array<const u8vec4> data.
Constructor & Destructor Documentation
◆ ImageSourceCArray()
| fastuidraw::ImageSourceCArray::ImageSourceCArray | ( | uvec2 | dimensions, |
| c_array< const c_array< const u8vec4 > > | pdata, | ||
| enum Image::format_t | fmt | ||
| ) |
Ctor.
- Parameters
-
dimensions width and height of the LOD level 0 mipmap; the LOD level n is then assumed to be size (dimensions.x() >> n, dimensions.y() >> n) pdata the texel data, the data is NOT copied, thus the contents backing the texel data must not be freed until the ImageSourceCArray goes out of scope. fmt the format of the image data
Member Function Documentation
◆ all_same_color()
|
virtual |
To be implemented by a derived class to return true if a region (across all mipmap levels) has a constant color.
- Parameters
-
location location at LOD 0 square_size width and height of region to check dst if all have texels of the region have the same color, write that color value to dst.
Implements fastuidraw::ImageSourceBase.
◆ fetch_texels()
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virtual |
To be implemented by a derived class to write to a c_array of u8vec4 data a rectangle of texels of a particular mipmap level. NOTE: if pixels are requested to be fetched from outside the sources natural dimensions, those pixels outside are to be duplicates of the boundary values.
- Parameters
-
level LOD of data where 0 represents the highest level of detail and each successive level is half the resolution in each dimension; it is gauranteed by the called that 0 <= level() < number_levels() location (x, y) location of data from which to copy w width of data from which to copy h height of data from which to copy dst location to which to write data, data is to be packed dst[x + w * y] holds the texel data (x + location.x(), y + location.y()) with 0 <= x < w and 0 <= y < h
Implements fastuidraw::ImageSourceBase.
◆ format()
|
virtual |
To be implemented by a derived class to return the format of the image data.
Implements fastuidraw::ImageSourceBase.
◆ number_levels()
|
virtual |
To be implemented by a derived class to return the number of levels (including the base-image) of image source has, i.e. if the image is to have no mipmapping, return 1.
Implements fastuidraw::ImageSourceBase.
The documentation for this class was generated from the following file:
- /home/kevin/fastuidraw.krogueintel/inc/fastuidraw/image.hpp
