kc3-lang/SDL/test/testautomation_surface.c

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• Hash : bcccbbd8
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  Date : 2022-12-05T00:35:32
  

  tests: avoid redefinition warnings for MSVC _CRT_???_NO_DEPRECATE macros

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• test/testautomation_surface.c

• /**
   * Original code: automated SDL surface test written by Edgar Simo "bobbens"
   * Adapted/rewritten for test lib by Andreas Schiffler
   */
  
  /* Supress C4996 VS compiler warnings for unlink() */
  #if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_DEPRECATE)
  #define _CRT_SECURE_NO_DEPRECATE
  #endif
  #if defined(_MSC_VER) && !defined(_CRT_NONSTDC_NO_DEPRECATE)
  #define _CRT_NONSTDC_NO_DEPRECATE
  #endif
  
  #include <stdio.h>
  #ifndef _MSC_VER
  #include <unistd.h>
  #endif
  #include <sys/stat.h>
  
  #include "SDL.h"
  #include "SDL_test.h"
  
  #ifdef __MACOSX__
  #include <unistd.h> /* For unlink() */
  #endif
  
  /* ================= Test Case Implementation ================== */
  
  /* Shared test surface */
  
  static SDL_Surface *referenceSurface = NULL;
  static SDL_Surface *testSurface = NULL;
  
  /* Helper functions for the test cases */
  
  #define TEST_SURFACE_WIDTH  testSurface->w
  #define TEST_SURFACE_HEIGHT testSurface->h
  
  /* Fixture */
  
  /* Create a 32-bit writable surface for blitting tests */
  void _surfaceSetUp(void *arg)
  {
      int result;
      SDL_BlendMode blendMode = SDL_BLENDMODE_NONE;
      SDL_BlendMode currentBlendMode;
      Uint32 rmask, gmask, bmask, amask;
  #if SDL_BYTEORDER == SDL_BIG_ENDIAN
      rmask = 0xff000000;
      gmask = 0x00ff0000;
      bmask = 0x0000ff00;
      amask = 0x000000ff;
  #else
      rmask = 0x000000ff;
      gmask = 0x0000ff00;
      bmask = 0x00ff0000;
      amask = 0xff000000;
  #endif
  
      referenceSurface = SDLTest_ImageBlit(); /* For size info */
      testSurface = SDL_CreateRGBSurface(SDL_SWSURFACE, referenceSurface->w, referenceSurface->h, 32, rmask, gmask, bmask, amask);
      SDLTest_AssertCheck(testSurface != NULL, "Check that testSurface is not NULL");
      if (testSurface != NULL) {
          /* Disable blend mode for target surface */
          result = SDL_SetSurfaceBlendMode(testSurface, blendMode);
          SDLTest_AssertCheck(result == 0, "Validate result from SDL_SetSurfaceBlendMode, expected: 0, got: %i", result);
          result = SDL_GetSurfaceBlendMode(testSurface, &currentBlendMode);
          SDLTest_AssertCheck(result == 0, "Validate result from SDL_GetSurfaceBlendMode, expected: 0, got: %i", result);
          SDLTest_AssertCheck(currentBlendMode == blendMode, "Validate blendMode, expected: %i, got: %i", blendMode, currentBlendMode);
      }
  }
  
  void _surfaceTearDown(void *arg)
  {
      SDL_FreeSurface(referenceSurface);
      referenceSurface = NULL;
      SDL_FreeSurface(testSurface);
      testSurface = NULL;
  }
  
  /**
   * Helper that clears the test surface
   */
  void _clearTestSurface()
  {
      int ret;
      Uint32 color;
  
      /* Clear surface. */
      color = SDL_MapRGBA(testSurface->format, 0, 0, 0, 0);
      SDLTest_AssertPass("Call to SDL_MapRGBA()");
      ret = SDL_FillRect(testSurface, NULL, color);
      SDLTest_AssertPass("Call to SDL_FillRect()");
      SDLTest_AssertCheck(ret == 0, "Verify result from SDL_FillRect, expected: 0, got: %i", ret);
  }
  
  /**
   * Helper that blits in a specific blend mode, -1 for basic blitting, -2 for color mod, -3 for alpha mod, -4 for mixed blend modes.
   */
  void _testBlitBlendMode(int mode)
  {
      int ret;
      int i, j, ni, nj;
      SDL_Surface *face;
      SDL_Rect rect;
      int nmode;
      SDL_BlendMode bmode;
      int checkFailCount1;
      int checkFailCount2;
      int checkFailCount3;
      int checkFailCount4;
  
      /* Check test surface */
      SDLTest_AssertCheck(testSurface != NULL, "Verify testSurface is not NULL");
      if (testSurface == NULL) {
          return;
      }
  
      /* Create sample surface */
      face = SDLTest_ImageFace();
      SDLTest_AssertCheck(face != NULL, "Verify face surface is not NULL");
      if (face == NULL) {
          return;
      }
  
      /* Reset alpha modulation */
      ret = SDL_SetSurfaceAlphaMod(face, 255);
      SDLTest_AssertPass("Call to SDL_SetSurfaceAlphaMod()");
      SDLTest_AssertCheck(ret == 0, "Verify result from SDL_SetSurfaceAlphaMod(), expected: 0, got: %i", ret);
  
      /* Reset color modulation */
      ret = SDL_SetSurfaceColorMod(face, 255, 255, 255);
      SDLTest_AssertPass("Call to SDL_SetSurfaceColorMod()");
      SDLTest_AssertCheck(ret == 0, "Verify result from SDL_SetSurfaceColorMod(), expected: 0, got: %i", ret);
  
      /* Reset color key */
      ret = SDL_SetColorKey(face, SDL_FALSE, 0);
      SDLTest_AssertPass("Call to SDL_SetColorKey()");
      SDLTest_AssertCheck(ret == 0, "Verify result from SDL_SetColorKey(), expected: 0, got: %i", ret);
  
      /* Clear the test surface */
      _clearTestSurface();
  
      /* Target rect size */
      rect.w = face->w;
      rect.h = face->h;
  
      /* Steps to take */
      ni = testSurface->w - face->w;
      nj = testSurface->h - face->h;
  
      /* Optionally set blend mode. */
      if (mode >= 0) {
          ret = SDL_SetSurfaceBlendMode(face, (SDL_BlendMode)mode);
          SDLTest_AssertPass("Call to SDL_SetSurfaceBlendMode()");
          SDLTest_AssertCheck(ret == 0, "Verify result from SDL_SetSurfaceBlendMode(..., %i), expected: 0, got: %i", mode, ret);
      }
  
      /* Test blend mode. */
      checkFailCount1 = 0;
      checkFailCount2 = 0;
      checkFailCount3 = 0;
      checkFailCount4 = 0;
      for (j = 0; j <= nj; j += 4) {
          for (i = 0; i <= ni; i += 4) {
              if (mode == -2) {
                  /* Set color mod. */
                  ret = SDL_SetSurfaceColorMod(face, (255 / nj) * j, (255 / ni) * i, (255 / nj) * j);
                  if (ret != 0) {
                      checkFailCount2++;
                  }
              } else if (mode == -3) {
                  /* Set alpha mod. */
                  ret = SDL_SetSurfaceAlphaMod(face, (255 / ni) * i);
                  if (ret != 0) {
                      checkFailCount3++;
                  }
              } else if (mode == -4) {
                  /* Crazy blending mode magic. */
                  nmode = (i / 4 * j / 4) % 4;
                  if (nmode == 0) {
                      bmode = SDL_BLENDMODE_NONE;
                  } else if (nmode == 1) {
                      bmode = SDL_BLENDMODE_BLEND;
                  } else if (nmode == 2) {
                      bmode = SDL_BLENDMODE_ADD;
                  } else if (nmode == 3) {
                      bmode = SDL_BLENDMODE_MOD;
                  } else {
                      /* Should be impossible, but some static checkers are too imprecise and will complain */
                      SDLTest_LogError("Invalid: nmode=%d", nmode);
                      return;
                  }
                  ret = SDL_SetSurfaceBlendMode(face, bmode);
                  if (ret != 0) {
                      checkFailCount4++;
                  }
              }
  
              /* Blitting. */
              rect.x = i;
              rect.y = j;
              ret = SDL_BlitSurface(face, NULL, testSurface, &rect);
              if (ret != 0) {
                  checkFailCount1++;
              }
          }
      }
      SDLTest_AssertCheck(checkFailCount1 == 0, "Validate results from calls to SDL_BlitSurface, expected: 0, got: %i", checkFailCount1);
      SDLTest_AssertCheck(checkFailCount2 == 0, "Validate results from calls to SDL_SetSurfaceColorMod, expected: 0, got: %i", checkFailCount2);
      SDLTest_AssertCheck(checkFailCount3 == 0, "Validate results from calls to SDL_SetSurfaceAlphaMod, expected: 0, got: %i", checkFailCount3);
      SDLTest_AssertCheck(checkFailCount4 == 0, "Validate results from calls to SDL_SetSurfaceBlendMode, expected: 0, got: %i", checkFailCount4);
  
      /* Clean up */
      SDL_FreeSurface(face);
      face = NULL;
  }
  
  /* Helper to check that a file exists */
  void _AssertFileExist(const char *filename)
  {
      struct stat st;
      int ret = stat(filename, &st);
  
      SDLTest_AssertCheck(ret == 0, "Verify file '%s' exists", filename);
  }
  
  /* Test case functions */
  
  /**
   * @brief Tests sprite saving and loading
   */
  int surface_testSaveLoadBitmap(void *arg)
  {
      int ret;
      const char *sampleFilename = "testSaveLoadBitmap.bmp";
      SDL_Surface *face;
      SDL_Surface *rface;
  
      /* Create sample surface */
      face = SDLTest_ImageFace();
      SDLTest_AssertCheck(face != NULL, "Verify face surface is not NULL");
      if (face == NULL) {
          return TEST_ABORTED;
      }
  
      /* Delete test file; ignore errors */
      unlink(sampleFilename);
  
      /* Save a surface */
      ret = SDL_SaveBMP(face, sampleFilename);
      SDLTest_AssertPass("Call to SDL_SaveBMP()");
      SDLTest_AssertCheck(ret == 0, "Verify result from SDL_SaveBMP, expected: 0, got: %i", ret);
      _AssertFileExist(sampleFilename);
  
      /* Load a surface */
      rface = SDL_LoadBMP(sampleFilename);
      SDLTest_AssertPass("Call to SDL_LoadBMP()");
      SDLTest_AssertCheck(rface != NULL, "Verify result from SDL_LoadBMP is not NULL");
      if (rface != NULL) {
          SDLTest_AssertCheck(face->w == rface->w, "Verify width of loaded surface, expected: %i, got: %i", face->w, rface->w);
          SDLTest_AssertCheck(face->h == rface->h, "Verify height of loaded surface, expected: %i, got: %i", face->h, rface->h);
      }
  
      /* Delete test file; ignore errors */
      unlink(sampleFilename);
  
      /* Clean up */
      SDL_FreeSurface(face);
      face = NULL;
      SDL_FreeSurface(rface);
      rface = NULL;
  
      return TEST_COMPLETED;
  }
  
  /* !
   *  Tests surface conversion.
   */
  int surface_testSurfaceConversion(void *arg)
  {
      SDL_Surface *rface = NULL, *face = NULL;
      int ret = 0;
  
      /* Create sample surface */
      face = SDLTest_ImageFace();
      SDLTest_AssertCheck(face != NULL, "Verify face surface is not NULL");
      if (face == NULL) {
          return TEST_ABORTED;
      }
  
      /* Set transparent pixel as the pixel at (0,0) */
      if (face->format->palette) {
          ret = SDL_SetColorKey(face, SDL_RLEACCEL, *(Uint8 *)face->pixels);
          SDLTest_AssertPass("Call to SDL_SetColorKey()");
          SDLTest_AssertCheck(ret == 0, "Verify result from SDL_SetColorKey, expected: 0, got: %i", ret);
      }
  
      /* Convert to 32 bit to compare. */
      rface = SDL_ConvertSurface( face, testSurface->format, 0 );
      SDLTest_AssertPass("Call to SDL_ConvertSurface()");
      SDLTest_AssertCheck(rface != NULL, "Verify result from SDL_ConvertSurface is not NULL");
  
      /* Compare surface. */
      ret = SDLTest_CompareSurfaces(rface, face, 0);
      SDLTest_AssertCheck(ret == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", ret);
  
      /* Clean up. */
      SDL_FreeSurface(face);
      face = NULL;
      SDL_FreeSurface(rface);
      rface = NULL;
  
      return TEST_COMPLETED;
  }
  
  /* !
   *  Tests surface conversion across all pixel formats.
   */
  int surface_testCompleteSurfaceConversion(void *arg)
  {
      Uint32 pixel_formats[] = {
          SDL_PIXELFORMAT_INDEX8,
          SDL_PIXELFORMAT_RGB332,
          SDL_PIXELFORMAT_RGB444,
          SDL_PIXELFORMAT_BGR444,
          SDL_PIXELFORMAT_RGB555,
          SDL_PIXELFORMAT_BGR555,
          SDL_PIXELFORMAT_ARGB4444,
          SDL_PIXELFORMAT_RGBA4444,
          SDL_PIXELFORMAT_ABGR4444,
          SDL_PIXELFORMAT_BGRA4444,
          SDL_PIXELFORMAT_ARGB1555,
          SDL_PIXELFORMAT_RGBA5551,
          SDL_PIXELFORMAT_ABGR1555,
          SDL_PIXELFORMAT_BGRA5551,
          SDL_PIXELFORMAT_RGB565,
          SDL_PIXELFORMAT_BGR565,
          SDL_PIXELFORMAT_RGB24,
          SDL_PIXELFORMAT_BGR24,
          SDL_PIXELFORMAT_RGB888,
          SDL_PIXELFORMAT_RGBX8888,
          SDL_PIXELFORMAT_BGR888,
          SDL_PIXELFORMAT_BGRX8888,
          SDL_PIXELFORMAT_ARGB8888,
          SDL_PIXELFORMAT_RGBA8888,
          SDL_PIXELFORMAT_ABGR8888,
          SDL_PIXELFORMAT_BGRA8888,
          SDL_PIXELFORMAT_ARGB2101010,
      };
      SDL_Surface *face = NULL, *cvt1, *cvt2, *final;
      SDL_PixelFormat *fmt1, *fmt2;
      int i, j, ret = 0;
  
      /* Create sample surface */
      face = SDLTest_ImageFace();
      SDLTest_AssertCheck(face != NULL, "Verify face surface is not NULL");
      if (face == NULL) {
          return TEST_ABORTED;
      }
  
      /* Set transparent pixel as the pixel at (0,0) */
      if (face->format->palette) {
          ret = SDL_SetColorKey(face, SDL_RLEACCEL, *(Uint8 *)face->pixels);
          SDLTest_AssertPass("Call to SDL_SetColorKey()");
          SDLTest_AssertCheck(ret == 0, "Verify result from SDL_SetColorKey, expected: 0, got: %i", ret);
      }
  
      for (i = 0; i < SDL_arraysize(pixel_formats); ++i) {
          for (j = 0; j < SDL_arraysize(pixel_formats); ++j) {
              fmt1 = SDL_AllocFormat(pixel_formats[i]);
              SDL_assert(fmt1 != NULL);
              cvt1 = SDL_ConvertSurface(face, fmt1, 0);
              SDL_assert(cvt1 != NULL);
  
              fmt2 = SDL_AllocFormat(pixel_formats[j]);
              SDL_assert(fmt1 != NULL);
              cvt2 = SDL_ConvertSurface(cvt1, fmt2, 0);
              SDL_assert(cvt2 != NULL);
  
              if ( fmt1->BytesPerPixel == face->format->BytesPerPixel &&
                   fmt2->BytesPerPixel == face->format->BytesPerPixel &&
                   (fmt1->Amask != 0) == (face->format->Amask != 0) &&
                   (fmt2->Amask != 0) == (face->format->Amask != 0) ) {
                  final = SDL_ConvertSurface( cvt2, face->format, 0 );
                  SDL_assert(final != NULL);
  
                  /* Compare surface. */
                  ret = SDLTest_CompareSurfaces(face, final, 0);
                  SDLTest_AssertCheck(ret == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", ret);
                  SDL_FreeSurface(final);
              }
  
              SDL_FreeSurface(cvt1);
              SDL_FreeFormat(fmt1);
              SDL_FreeSurface(cvt2);
              SDL_FreeFormat(fmt2);
          }
      }
  
      /* Clean up. */
      SDL_FreeSurface(face);
  
      return TEST_COMPLETED;
  }
  
  /**
   * @brief Tests sprite loading. A failure case.
   */
  int surface_testLoadFailure(void *arg)
  {
      SDL_Surface *face = SDL_LoadBMP("nonexistant.bmp");
      SDLTest_AssertCheck(face == NULL, "SDL_CreateLoadBmp");
  
      return TEST_COMPLETED;
  }
  
  /**
   * @brief Tests some blitting routines.
   */
  int surface_testBlit(void *arg)
  {
      int ret;
      SDL_Surface *compareSurface;
  
      /* Basic blitting */
      _testBlitBlendMode(-1);
  
      /* Verify result by comparing surfaces */
      compareSurface = SDLTest_ImageBlit();
      ret = SDLTest_CompareSurfaces(testSurface, compareSurface, 0);
      SDLTest_AssertCheck(ret == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", ret);
  
      /* Clean up. */
      SDL_FreeSurface(compareSurface);
  
      return TEST_COMPLETED;
  }
  
  /**
   * @brief Tests some blitting routines with color mod
   */
  int surface_testBlitColorMod(void *arg)
  {
      int ret;
      SDL_Surface *compareSurface;
  
      /* Basic blitting with color mod */
      _testBlitBlendMode(-2);
  
      /* Verify result by comparing surfaces */
      compareSurface = SDLTest_ImageBlitColor();
      ret = SDLTest_CompareSurfaces(testSurface, compareSurface, 0);
      SDLTest_AssertCheck(ret == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", ret);
  
      /* Clean up. */
      SDL_FreeSurface(compareSurface);
  
      return TEST_COMPLETED;
  }
  
  /**
   * @brief Tests some blitting routines with alpha mod
   */
  int surface_testBlitAlphaMod(void *arg)
  {
      int ret;
      SDL_Surface *compareSurface;
  
      /* Basic blitting with alpha mod */
      _testBlitBlendMode(-3);
  
      /* Verify result by comparing surfaces */
      compareSurface = SDLTest_ImageBlitAlpha();
      ret = SDLTest_CompareSurfaces(testSurface, compareSurface, 0);
      SDLTest_AssertCheck(ret == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", ret);
  
      /* Clean up. */
      SDL_FreeSurface(compareSurface);
  
      return TEST_COMPLETED;
  }
  
  /**
   * @brief Tests some more blitting routines.
   */
  int surface_testBlitBlendNone(void *arg)
  {
      int ret;
      SDL_Surface *compareSurface;
  
      /* Basic blitting */
      _testBlitBlendMode(SDL_BLENDMODE_NONE);
  
      /* Verify result by comparing surfaces */
      compareSurface = SDLTest_ImageBlitBlendNone();
      ret = SDLTest_CompareSurfaces(testSurface, compareSurface, 0);
      SDLTest_AssertCheck(ret == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", ret);
  
      /* Clean up. */
      SDL_FreeSurface(compareSurface);
  
      return TEST_COMPLETED;
  }
  
  /**
   * @brief Tests some more blitting routines.
   */
  int surface_testBlitBlendBlend(void *arg)
  {
      int ret;
      SDL_Surface *compareSurface;
  
      /* Blend blitting */
      _testBlitBlendMode(SDL_BLENDMODE_BLEND);
  
      /* Verify result by comparing surfaces */
      compareSurface = SDLTest_ImageBlitBlend();
      ret = SDLTest_CompareSurfaces(testSurface, compareSurface, 0);
      SDLTest_AssertCheck(ret == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", ret);
  
      /* Clean up. */
      SDL_FreeSurface(compareSurface);
  
      return TEST_COMPLETED;
  }
  
  /**
   * @brief Tests some more blitting routines.
   */
  int surface_testBlitBlendAdd(void *arg)
  {
      int ret;
      SDL_Surface *compareSurface;
  
      /* Add blitting */
      _testBlitBlendMode(SDL_BLENDMODE_ADD);
  
      /* Verify result by comparing surfaces */
      compareSurface = SDLTest_ImageBlitBlendAdd();
      ret = SDLTest_CompareSurfaces(testSurface, compareSurface, 0);
      SDLTest_AssertCheck(ret == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", ret);
  
      /* Clean up. */
      SDL_FreeSurface(compareSurface);
  
      return TEST_COMPLETED;
  }
  
  /**
   * @brief Tests some more blitting routines.
   */
  int surface_testBlitBlendMod(void *arg)
  {
      int ret;
      SDL_Surface *compareSurface;
  
      /* Mod blitting */
      _testBlitBlendMode(SDL_BLENDMODE_MOD);
  
      /* Verify result by comparing surfaces */
      compareSurface = SDLTest_ImageBlitBlendMod();
      ret = SDLTest_CompareSurfaces(testSurface, compareSurface, 0);
      SDLTest_AssertCheck(ret == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", ret);
  
      /* Clean up. */
      SDL_FreeSurface(compareSurface);
  
      return TEST_COMPLETED;
  }
  
  /**
   * @brief Tests some more blitting routines with loop
   */
  int surface_testBlitBlendLoop(void *arg)
  {
  
      int ret;
      SDL_Surface *compareSurface;
  
      /* All blitting modes */
      _testBlitBlendMode(-4);
  
      /* Verify result by comparing surfaces */
      compareSurface = SDLTest_ImageBlitBlendAll();
      ret = SDLTest_CompareSurfaces(testSurface, compareSurface, 0);
      SDLTest_AssertCheck(ret == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", ret);
  
      /* Clean up. */
      SDL_FreeSurface(compareSurface);
  
      return TEST_COMPLETED;
  }
  
  int surface_testOverflow(void *arg)
  {
      char buf[1024];
      const char *expectedError;
      SDL_Surface *surface;
  
      SDL_memset(buf, '\0', sizeof(buf));
  
      expectedError = "Parameter 'width' is invalid";
      surface = SDL_CreateRGBSurfaceWithFormat(0, -3, 100, 8, SDL_PIXELFORMAT_INDEX8);
      SDLTest_AssertCheck(surface == NULL, "Should detect negative width");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, -1, 1, 8, 4, SDL_PIXELFORMAT_INDEX8);
      SDLTest_AssertCheck(surface == NULL, "Should detect negative width");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
      surface = SDL_CreateRGBSurfaceFrom(buf, -1, 1, 32, 4, 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF);
      SDLTest_AssertCheck(surface == NULL, "Should detect negative width");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
  
      expectedError = "Parameter 'height' is invalid";
      surface = SDL_CreateRGBSurfaceWithFormat(0, 100, -3, 8, SDL_PIXELFORMAT_INDEX8);
      SDLTest_AssertCheck(surface == NULL, "Should detect negative height");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 1, -1, 8, 4, SDL_PIXELFORMAT_INDEX8);
      SDLTest_AssertCheck(surface == NULL, "Should detect negative height");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
      surface = SDL_CreateRGBSurfaceFrom(buf, 1, -1, 32, 4, 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF);
      SDLTest_AssertCheck(surface == NULL, "Should detect negative height");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
  
      expectedError = "Parameter 'pitch' is invalid";
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 4, 1, 8, -1, SDL_PIXELFORMAT_INDEX8);
      SDLTest_AssertCheck(surface == NULL, "Should detect negative pitch");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
      surface = SDL_CreateRGBSurfaceFrom(buf, 1, 1, 32, -1, 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF);
      SDLTest_AssertCheck(surface == NULL, "Should detect negative pitch");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
  
      /* Less than 1 byte per pixel: the pitch can legitimately be less than
       * the width, but it must be enough to hold the appropriate number of
       * bits per pixel. SDL_PIXELFORMAT_INDEX4* needs 1 byte per 2 pixels. */
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 6, 1, 4, 3, SDL_PIXELFORMAT_INDEX4LSB);
      SDLTest_AssertCheck(surface != NULL, "6px * 4 bits per px fits in 3 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
      surface = SDL_CreateRGBSurfaceFrom(buf, 6, 1, 4, 3, 0, 0, 0, 0);
      SDLTest_AssertCheck(surface != NULL, "6px * 4 bits per px fits in 3 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
  
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 7, 1, 4, 3, SDL_PIXELFORMAT_INDEX4LSB);
      SDLTest_AssertCheck(surface == NULL, "Should detect pitch < width * bpp");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
      surface = SDL_CreateRGBSurfaceFrom(buf, 7, 1, 4, 3, 0, 0, 0, 0);
      SDLTest_AssertCheck(surface == NULL, "Should detect pitch < width * bpp");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
  
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 7, 1, 4, 4, SDL_PIXELFORMAT_INDEX4LSB);
      SDLTest_AssertCheck(surface != NULL, "7px * 4 bits per px fits in 4 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
      surface = SDL_CreateRGBSurfaceFrom(buf, 7, 1, 4, 4, 0, 0, 0, 0);
      SDLTest_AssertCheck(surface != NULL, "7px * 4 bits per px fits in 4 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
  
      /* SDL_PIXELFORMAT_INDEX1* needs 1 byte per 8 pixels. */
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 16, 1, 1, 2, SDL_PIXELFORMAT_INDEX1LSB);
      SDLTest_AssertCheck(surface != NULL, "16px * 1 bit per px fits in 2 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
      surface = SDL_CreateRGBSurfaceFrom(buf, 16, 1, 1, 2, 0, 0, 0, 0);
      SDLTest_AssertCheck(surface != NULL, "16px * 1 bit per px fits in 2 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
  
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 17, 1, 1, 2, SDL_PIXELFORMAT_INDEX1LSB);
      SDLTest_AssertCheck(surface == NULL, "Should detect pitch < width * bpp");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
      surface = SDL_CreateRGBSurfaceFrom(buf, 17, 1, 1, 2, 0, 0, 0, 0);
      SDLTest_AssertCheck(surface == NULL, "Should detect pitch < width * bpp");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
  
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 17, 1, 1, 3, SDL_PIXELFORMAT_INDEX1LSB);
      SDLTest_AssertCheck(surface != NULL, "17px * 1 bit per px fits in 3 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
      surface = SDL_CreateRGBSurfaceFrom(buf, 17, 1, 1, 3, 0, 0, 0, 0);
      SDLTest_AssertCheck(surface != NULL, "17px * 1 bit per px fits in 3 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
  
      /* SDL_PIXELFORMAT_INDEX8 and SDL_PIXELFORMAT_RGB332 require 1 byte per pixel. */
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 5, 1, 8, 5, SDL_PIXELFORMAT_RGB332);
      SDLTest_AssertCheck(surface != NULL, "5px * 8 bits per px fits in 5 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
      surface = SDL_CreateRGBSurfaceFrom(buf, 5, 1, 8, 5, 0, 0, 0, 0);
      SDLTest_AssertCheck(surface != NULL, "5px * 8 bits per px fits in 5 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
  
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 6, 1, 8, 5, SDL_PIXELFORMAT_RGB332);
      SDLTest_AssertCheck(surface == NULL, "Should detect pitch < width * bpp");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
      surface = SDL_CreateRGBSurfaceFrom(buf, 6, 1, 8, 5, 0, 0, 0, 0);
      SDLTest_AssertCheck(surface == NULL, "Should detect pitch < width * bpp");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
  
      /* Everything else requires more than 1 byte per pixel, and rounds up
       * each pixel to an integer number of bytes (e.g. RGB555 is really
       * XRGB1555, with 1 bit per pixel wasted). */
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 3, 1, 15, 6, SDL_PIXELFORMAT_RGB555);
      SDLTest_AssertCheck(surface != NULL, "3px * 15 (really 16) bits per px fits in 6 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
      surface = SDL_CreateRGBSurfaceFrom(buf, 3, 1, 15, 6, 0, 0, 0, 0);
      SDLTest_AssertCheck(surface != NULL, "5px * 15 (really 16) bits per px fits in 6 bytes: %s",
                          surface != NULL ? "(success)" : SDL_GetError());
      SDL_FreeSurface(surface);
  
      surface = SDL_CreateRGBSurfaceWithFormatFrom(buf, 4, 1, 15, 6, SDL_PIXELFORMAT_RGB555);
      SDLTest_AssertCheck(surface == NULL, "4px * 15 (really 16) bits per px doesn't fit in 6 bytes");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
      surface = SDL_CreateRGBSurfaceFrom(buf, 4, 1, 15, 6, 0, 0, 0, 0);
      SDLTest_AssertCheck(surface == NULL, "4px * 15 (really 16) bits per px doesn't fit in 6 bytes");
      SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                          "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
  
      if (sizeof(size_t) == 4 && sizeof(int) >= 4) {
          expectedError = "Out of memory";
          surface = SDL_CreateRGBSurfaceWithFormat(0, SDL_MAX_SINT32, 1, 8, SDL_PIXELFORMAT_INDEX8);
          SDLTest_AssertCheck(surface == NULL, "Should detect overflow in width + alignment");
          SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                              "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
          surface = SDL_CreateRGBSurfaceWithFormat(0, SDL_MAX_SINT32 / 2, 1, 32, SDL_PIXELFORMAT_ARGB8888);
          SDLTest_AssertCheck(surface == NULL, "Should detect overflow in width * bytes per pixel");
          SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                              "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
          surface = SDL_CreateRGBSurfaceWithFormat(0, (1 << 29) - 1, (1 << 29) - 1, 8, SDL_PIXELFORMAT_INDEX8);
          SDLTest_AssertCheck(surface == NULL, "Should detect overflow in width * height");
          SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                              "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
          surface = SDL_CreateRGBSurfaceWithFormat(0, (1 << 15) + 1, (1 << 15) + 1, 32, SDL_PIXELFORMAT_ARGB8888);
          SDLTest_AssertCheck(surface == NULL, "Should detect overflow in width * height * bytes per pixel");
          SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
                              "Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
      } else {
          SDLTest_Log("Can't easily overflow size_t on this platform");
      }
  
      return TEST_COMPLETED;
  }
  
  /* ================= Test References ================== */
  
  /* Surface test cases */
  static const SDLTest_TestCaseReference surfaceTest1 = {
      (SDLTest_TestCaseFp)surface_testSaveLoadBitmap, "surface_testSaveLoadBitmap", "Tests sprite saving and loading.", TEST_ENABLED
  };
  
  static const SDLTest_TestCaseReference surfaceTest2 = {
      (SDLTest_TestCaseFp)surface_testBlit, "surface_testBlit", "Tests basic blitting.", TEST_ENABLED
  };
  
  static const SDLTest_TestCaseReference surfaceTest3 = {
      (SDLTest_TestCaseFp)surface_testBlitBlendNone, "surface_testBlitBlendNone", "Tests blitting routines with none blending mode.", TEST_ENABLED
  };
  
  static const SDLTest_TestCaseReference surfaceTest4 = {
      (SDLTest_TestCaseFp)surface_testLoadFailure, "surface_testLoadFailure", "Tests sprite loading. A failure case.", TEST_ENABLED
  };
  
  static const SDLTest_TestCaseReference surfaceTest5 = {
      (SDLTest_TestCaseFp)surface_testSurfaceConversion, "surface_testSurfaceConversion", "Tests surface conversion.", TEST_ENABLED
  };
  
  static const SDLTest_TestCaseReference surfaceTest6 = {
      (SDLTest_TestCaseFp)surface_testCompleteSurfaceConversion, "surface_testCompleteSurfaceConversion", "Tests surface conversion across all pixel formats", TEST_ENABLED
  };
  
  static const SDLTest_TestCaseReference surfaceTest7 = {
      (SDLTest_TestCaseFp)surface_testBlitColorMod, "surface_testBlitColorMod", "Tests some blitting routines with color mod.", TEST_ENABLED
  };
  
  static const SDLTest_TestCaseReference surfaceTest8 = {
      (SDLTest_TestCaseFp)surface_testBlitAlphaMod, "surface_testBlitAlphaMod", "Tests some blitting routines with alpha mod.", TEST_ENABLED
  };
  
  /* TODO: rewrite test case, define new test data and re-enable; current implementation fails */
  static const SDLTest_TestCaseReference surfaceTest9 = {
      (SDLTest_TestCaseFp)surface_testBlitBlendLoop, "surface_testBlitBlendLoop", "Test blitting routines with various blending modes", TEST_DISABLED
  };
  
  /* TODO: rewrite test case, define new test data and re-enable; current implementation fails */
  static const SDLTest_TestCaseReference surfaceTest10 = {
      (SDLTest_TestCaseFp)surface_testBlitBlendBlend, "surface_testBlitBlendBlend", "Tests blitting routines with blend blending mode.", TEST_DISABLED
  };
  
  /* TODO: rewrite test case, define new test data and re-enable; current implementation fails */
  static const SDLTest_TestCaseReference surfaceTest11 = {
      (SDLTest_TestCaseFp)surface_testBlitBlendAdd, "surface_testBlitBlendAdd", "Tests blitting routines with add blending mode.", TEST_DISABLED
  };
  
  static const SDLTest_TestCaseReference surfaceTest12 = {
      (SDLTest_TestCaseFp)surface_testBlitBlendMod, "surface_testBlitBlendMod", "Tests blitting routines with mod blending mode.", TEST_ENABLED
  };
  
  static const SDLTest_TestCaseReference surfaceTestOverflow = {
      surface_testOverflow, "surface_testOverflow", "Test overflow detection.", TEST_ENABLED
  };
  
  /* Sequence of Surface test cases */
  static const SDLTest_TestCaseReference *surfaceTests[] = {
      &surfaceTest1, &surfaceTest2, &surfaceTest3, &surfaceTest4, &surfaceTest5,
      &surfaceTest6, &surfaceTest7, &surfaceTest8, &surfaceTest9, &surfaceTest10,
      &surfaceTest11, &surfaceTest12, &surfaceTestOverflow, NULL
  };
  
  /* Surface test suite (global) */
  SDLTest_TestSuiteReference surfaceTestSuite = {
      "Surface",
      _surfaceSetUp,
      surfaceTests,
      _surfaceTearDown
  
  };
  

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