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  1. /* Written by turbocat2001 (Logaev Maxim) */
  2.  
  3. #include <stdio.h>
  4. #include <stdlib.h>
  5. #include <stddef.h>
  6. #include <kolibri_libimg.h>
  7. #include <kos32sys.h>
  8.  
  9. #define NEW_IMG_H 128
  10. #define NEW_IMG_W 128
  11.  
  12. #define IMG_H 256
  13. #define IMG_W 256
  14.  
  15. Image *image_blend; // Create image struct
  16.  
  17. struct kolibri_system_colors sys_color_table;  // Create system colors table
  18.  
  19. char* load_img(char* fname, int32_t* read_sz){  // Image file upload function
  20.     FILE *f = fopen(fname, "rb");
  21.     if (!f) {
  22.         printf("Can't open file: %s\n", fname);
  23.         exit(0);
  24.     }
  25.     if (fseek(f, 0, SEEK_END)) {
  26.         printf("Can't SEEK_END file: %s\n", fname);
  27.         exit(0);
  28.     }
  29.     int filesize = ftell(f);
  30.     rewind(f);
  31.     char* fdata = malloc(filesize);
  32.     if(!fdata) {
  33.         printf("No memory for file %s\n", fname);
  34.         exit(0);
  35.     }
  36.     *read_sz = fread(fdata, 1, filesize, f);
  37.     if (ferror(f)) {
  38.         printf("Error reading file %s\n", fname);
  39.         exit(0);
  40.     }
  41.     fclose(f);
  42.     return fdata;
  43. }
  44.  
  45. void DrawGUI(){
  46.     begin_draw();
  47.         sys_create_window(10, 40, (IMG_W+NEW_IMG_W)+50, IMG_H+50, "Libimg", sys_color_table.work_area, 0x34);
  48.         img_draw(image_blend, 10, 10, IMG_W*2, IMG_H , 0, 0);  // Draw blended image to window
  49.     end_draw();
  50. }
  51.  
  52. int main(){
  53.     if (kolibri_libimg_init() == -1){
  54.                 printf("Error loading lib_img.obj\n");
  55.         exit(0);
  56.         }
  57.        
  58.         get_system_colors(&sys_color_table); // Get system colors theme
  59.    
  60.     uint32_t img_size;
  61.     void *file_data = load_img("logo.png", &img_size); // Get RAW data and size
  62.    
  63.     Image* image = img_decode(file_data, img_size, 0); // Decode RAW data to Image data
  64.    
  65.     if (image->Type != IMAGE_BPP32) {
  66.         image = img_convert(image, NULL, IMAGE_BPP32, 0, 0); // Convert image to format BPP32
  67.         if (!image) {
  68.              printf("Сonvert error!: \n");  
  69.              exit(0);
  70.         }
  71.     }
  72.    
  73.     image_blend = img_create(IMG_W+NEW_IMG_W, IMG_H, IMAGE_BPP32);  // Create an empty layer
  74.     img_fill_color(image_blend, IMG_W+NEW_IMG_W, IMG_H, sys_color_table.work_area); // Fill the layer with one color
  75.     img_blend(image_blend, image, 0, 0, 0, 0, IMG_W, IMG_H);  // Blending images to display the alpha channel.
  76.     /* Reduce image size from 256x256 to 128x128 */
  77.     image = img_scale(image, 0, 0, IMG_W, IMG_H, NULL, LIBIMG_SCALE_STRETCH , LIBIMG_INTER_BILINEAR, NEW_IMG_W, NEW_IMG_H);
  78.     img_blend(image_blend, image, 256, 0, 0, 0, NEW_IMG_W, NEW_IMG_H);
  79.     img_destroy(image);  // Destroy image structure
  80.     free(file_data);  // Free allocated file_data buffer
  81.    
  82.     set_wanted_events_mask(0xC0000027);
  83.    
  84.     /* Main event loop */
  85.     while (1) {        
  86.                 switch(get_os_event()){
  87.                         case KOLIBRI_EVENT_REDRAW:
  88.                                 DrawGUI();
  89.                                 break;
  90.                         case KOLIBRI_EVENT_BUTTON:
  91.                                 if (get_os_button() == 1){
  92.                     return 0;
  93.                 }
  94.                                 break;
  95.         }
  96.         }
  97.         return 0;
  98. }
  99.