kc3-lang/SDL/test/testutils.c

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• Hash : 76a7b629
  Author :
  Date : 2022-04-12T13:07:18
  

  test: Add some common code to load test resources As well as reducing duplication, this lets the tests load their resources from the SDL_GetBasePath() on platforms that support it, which is useful if the tests are compiled along with the rest of SDL and installed below /usr as manual tests, similar to GNOME's installed-tests convention. Thanks to Ozkan Sezer for the OS/2 build glue. Co-authored-by: Ozkan Sezer <sezeroz@gmail.com> Signed-off-by: Simon McVittie <smcv@collabora.com>

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• test/testutils.c

• /*
  Copyright 1997-2022 Sam Lantinga
  Copyright 2022 Collabora Ltd.
  SPDX-License-Identifier: Zlib
  */
  
  #include "testutils.h"
  
  #if defined(SDL_FILESYSTEM_OS2) || defined(SDL_FILESYSTEM_WINDOWS)
  static const char pathsep[] = "\\";
  #elif defined(SDL_FILESYSTEM_RISCOS)
  static const char pathsep[] = ".";
  #else
  static const char pathsep[] = "/";
  #endif
  
  /*
   * Return the absolute path to def in the SDL_GetBasePath() if possible, or
   * the relative path to def on platforms that don't have a working
   * SDL_GetBasePath(). Free the result with SDL_free.
   *
   * Fails and returns NULL if out of memory.
   */
  char *
  GetNearbyFilename(const char *file)
  {
      char *base;
      char *path;
  
      base = SDL_GetBasePath();
  
      if (base != NULL) {
          size_t len = SDL_strlen(base) + SDL_strlen(pathsep) + SDL_strlen(file) + 1;
  
          path = SDL_malloc(len);
  
          if (path == NULL) {
              SDL_OutOfMemory();
              return NULL;
          }
  
          SDL_snprintf(path, len, "%s%s%s", base, pathsep, file);
      }
  
      if (base) {
          SDL_free(base);
      }
  
      return path;
  }
  
  /*
   * If user_specified is non-NULL, return a copy of it. Free with SDL_free.
   *
   * Otherwise, return the absolute path to def in the SDL_GetBasePath() if
   * possible, or the relative path to def on platforms that don't have a
   * working SDL_GetBasePath(). Free the result with SDL_free.
   *
   * Fails and returns NULL if out of memory.
   */
  char *
  GetResourceFilename(const char *user_specified, const char *def)
  {
      if (user_specified != NULL) {
          char *ret = SDL_strdup(user_specified);
  
          if (ret == NULL) {
              SDL_OutOfMemory();
          }
  
          return ret;
      } else {
          return GetNearbyFilename(def);
      }
  }
  
  /*
   * Load the .bmp file whose name is file, from the SDL_GetBasePath() if
   * possible or the current working directory if not.
   *
   * If transparent is true, set the transparent colour from the top left pixel.
   *
   * If width_out is non-NULL, set it to the texture width.
   *
   * If height_out is non-NULL, set it to the texture height.
   */
  SDL_Texture *
  LoadTexture(SDL_Renderer *renderer, const char *file, SDL_bool transparent,
              int *width_out, int *height_out)
  {
      SDL_Surface *temp = NULL;
      SDL_Texture *texture = NULL;
      char *path;
  
      path = GetNearbyFilename(file);
  
      if (path != NULL) {
          file = path;
      }
  
      temp = SDL_LoadBMP(file);
      if (temp == NULL) {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s", file, SDL_GetError());
      } else {
          /* Set transparent pixel as the pixel at (0,0) */
          if (transparent) {
              if (temp->format->palette) {
                  SDL_SetColorKey(temp, SDL_TRUE, *(Uint8 *)temp->pixels);
              } else {
                  switch (temp->format->BitsPerPixel) {
                  case 15:
                      SDL_SetColorKey(temp, SDL_TRUE,
                                      (*(Uint16 *) temp->pixels) & 0x00007FFF);
                      break;
                  case 16:
                      SDL_SetColorKey(temp, SDL_TRUE, *(Uint16 *) temp->pixels);
                      break;
                  case 24:
                      SDL_SetColorKey(temp, SDL_TRUE,
                                      (*(Uint32 *) temp->pixels) & 0x00FFFFFF);
                      break;
                  case 32:
                      SDL_SetColorKey(temp, SDL_TRUE, *(Uint32 *) temp->pixels);
                      break;
                  }
              }
          }
  
          if (width_out != NULL) {
              *width_out = temp->w;
          }
  
          if (height_out != NULL) {
              *height_out = temp->h;
          }
  
          texture = SDL_CreateTextureFromSurface(renderer, temp);
          if (!texture) {
              SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create texture: %s\n", SDL_GetError());
          }
      }
      if (temp) {
          SDL_FreeSurface(temp);
      }
      if (path) {
          SDL_free(path);
      }
      return texture;
  }
  

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