libertuscode's Introduction

libertuscode

Single header utility libraries with APL2, Boost, BSD, MIT, or compatible licenses. This code is based on work of various open source project constributions by some very generous people. All credits and original licensing are at the top of the files.

lc_image

JPG and PNG loader. JPG baseline only, progressive JPGs will not work.

  // Loading from file
  int w, h, c;
  unsigned char* data = lc_load_image("test_001.png", &w, &h, &c, 0);
  // do some st uff
  lc_free_image(data);
  
  // Loading from memory  
  int w, h, c;
  unsigned char* data = lc_load_image_mem(size, data, &w, &h, &c, 0);
  // do some st uff
  lc_free_image(data);

The last parameter for both lc_load_image and lc_load_image_mem can be either 0, 1, 2, 3, 4.

required_channel	# channels loaded
0	JPG=3, PNG=4
1	1
2	2
3	3
4	4, A=0xFF

lc_image_resize

Image resize with various filters:

filter name/constant
LC_FILTER_BOX
LC_FILTER_TRIANGLE
LC_FILTER_QUADRATIC
LC_FILTER_CUBIC
LC_FILTER_CATMUL_ROM
LC_FILTER_MITCHELL
LC_FILTER_SINC_BLACKMAN
LC_FILTER_GAUSSIAN
LC_FILTER_BESSEL_BLACKMAN

// 8-bit
void lc_image_resize_uint8(int src_width, int src_height, int src_row_stride, const unsigned char* p_src_data,
                           int dst_wdith, int dst_height, int dst_row_stride, unsigned char* p_dst_data,
                           unsigned int channel_count, lc_filter filter, const lc_filter_args* p_filter_args);

// float
void lc_image_resize_float(int src_width, int src_height, int src_row_stride, const float* p_src_data,
                           int dst_wdith, int dst_height, int dst_row_stride, float* p_dst_data,
                           unsigned int channel_count, lc_filter filter, const lc_filter_args* p_filter_args);