kc3-lang/SDL/src/video/SDL_fillrect.c

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• Hash : 4ca5d862
  Author :
  Date : 2017-09-06T04:32:30
  

  Fixed bug 3780 - GCC 7 implicit fallthrough warnings Martin Gerhardy 2017-08-28 06:58:01 UTC SDL_blit.h, SDL_fillrect.c and SDL_stdinc.h produces a lot of the (new) gcc-7 implicit fallthrough warnings.

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• src/video/SDL_fillrect.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely, subject to the following restrictions:
  
    1. The origin of this software must not be misrepresented; you must not
       claim that you wrote the original software. If you use this software
       in a product, an acknowledgment in the product documentation would be
       appreciated but is not required.
    2. Altered source versions must be plainly marked as such, and must not be
       misrepresented as being the original software.
    3. This notice may not be removed or altered from any source distribution.
  */
  #include "../SDL_internal.h"
  
  #include "SDL_video.h"
  #include "SDL_blit.h"
  
  
  #ifdef __SSE__
  /* *INDENT-OFF* */
  
  #ifdef _MSC_VER
  #define SSE_BEGIN \
      __m128 c128; \
      c128.m128_u32[0] = color; \
      c128.m128_u32[1] = color; \
      c128.m128_u32[2] = color; \
      c128.m128_u32[3] = color;
  #else
  #define SSE_BEGIN \
      __m128 c128; \
      DECLARE_ALIGNED(Uint32, cccc[4], 16); \
      cccc[0] = color; \
      cccc[1] = color; \
      cccc[2] = color; \
      cccc[3] = color; \
      c128 = *(__m128 *)cccc;
  #endif
  
  #define SSE_WORK \
      for (i = n / 64; i--;) { \
          _mm_stream_ps((float *)(p+0), c128); \
          _mm_stream_ps((float *)(p+16), c128); \
          _mm_stream_ps((float *)(p+32), c128); \
          _mm_stream_ps((float *)(p+48), c128); \
          p += 64; \
      }
  
  #define SSE_END
  
  #define DEFINE_SSE_FILLRECT(bpp, type) \
  static void \
  SDL_FillRect##bpp##SSE(Uint8 *pixels, int pitch, Uint32 color, int w, int h) \
  { \
      int i, n; \
      Uint8 *p = NULL; \
   \
      SSE_BEGIN; \
   \
      while (h--) { \
          n = w * bpp; \
          p = pixels; \
   \
          if (n > 63) { \
              int adjust = 16 - ((uintptr_t)p & 15); \
              if (adjust < 16) { \
                  n -= adjust; \
                  adjust /= bpp; \
                  while (adjust--) { \
                      *((type *)p) = (type)color; \
                      p += bpp; \
                  } \
              } \
              SSE_WORK; \
          } \
          if (n & 63) { \
              int remainder = (n & 63); \
              remainder /= bpp; \
              while (remainder--) { \
                  *((type *)p) = (type)color; \
                  p += bpp; \
              } \
          } \
          pixels += pitch; \
      } \
   \
      SSE_END; \
  }
  
  static void
  SDL_FillRect1SSE(Uint8 *pixels, int pitch, Uint32 color, int w, int h)
  {
      int i, n;
  
      SSE_BEGIN;
      while (h--) {
          Uint8 *p = pixels;
          n = w;
  
          if (n > 63) {
              int adjust = 16 - ((uintptr_t)p & 15);
              if (adjust) {
                  n -= adjust;
                  SDL_memset(p, color, adjust);
                  p += adjust;
              }
              SSE_WORK;
          }
          if (n & 63) {
              int remainder = (n & 63);
              SDL_memset(p, color, remainder);
          }
          pixels += pitch;
      }
  
      SSE_END;
  }
  /* DEFINE_SSE_FILLRECT(1, Uint8) */
  DEFINE_SSE_FILLRECT(2, Uint16)
  DEFINE_SSE_FILLRECT(4, Uint32)
  
  /* *INDENT-ON* */
  #endif /* __SSE__ */
  
  static void
  SDL_FillRect1(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
  {
      int n;
      Uint8 *p = NULL;
      
      while (h--) {
          n = w;
          p = pixels;
  
          if (n > 3) {
              switch ((uintptr_t) p & 3) {
              case 1:
                  *p++ = (Uint8) color;
                  --n;                    /* fallthrough */
              case 2:
                  *p++ = (Uint8) color;
                  --n;                    /* fallthrough */
              case 3:
                  *p++ = (Uint8) color;
                  --n;                    /* fallthrough */
              }
              SDL_memset4(p, color, (n >> 2));
          }
          if (n & 3) {
              p += (n & ~3);
              switch (n & 3) {
              case 3:
                  *p++ = (Uint8) color;   /* fallthrough */
              case 2:
                  *p++ = (Uint8) color;   /* fallthrough */
              case 1:
                  *p++ = (Uint8) color;   /* fallthrough */
              }
          }
          pixels += pitch;
      }
  }
  
  static void
  SDL_FillRect2(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
  {
      int n;
      Uint16 *p = NULL;
      
      while (h--) {
          n = w;
          p = (Uint16 *) pixels;
  
          if (n > 1) {
              if ((uintptr_t) p & 2) {
                  *p++ = (Uint16) color;
                  --n;
              }
              SDL_memset4(p, color, (n >> 1));
          }
          if (n & 1) {
              p[n - 1] = (Uint16) color;
          }
          pixels += pitch;
      }
  }
  
  static void
  SDL_FillRect3(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
  {
  #if SDL_BYTEORDER == SDL_LIL_ENDIAN
      Uint8 b1 = (Uint8) (color & 0xFF);
      Uint8 b2 = (Uint8) ((color >> 8) & 0xFF);
      Uint8 b3 = (Uint8) ((color >> 16) & 0xFF);
  #elif SDL_BYTEORDER == SDL_BIG_ENDIAN
      Uint8 b1 = (Uint8) ((color >> 16) & 0xFF);
      Uint8 b2 = (Uint8) ((color >> 8) & 0xFF);
      Uint8 b3 = (Uint8) (color & 0xFF);
  #endif
      int n;
      Uint8 *p = NULL;
  
      while (h--) {
          n = w;
          p = pixels;
  
          while (n--) {
              *p++ = b1;
              *p++ = b2;
              *p++ = b3;
          }
          pixels += pitch;
      }
  }
  
  static void
  SDL_FillRect4(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
  {
      while (h--) {
          SDL_memset4(pixels, color, w);
          pixels += pitch;
      }
  }
  
  /* 
   * This function performs a fast fill of the given rectangle with 'color'
   */
  int
  SDL_FillRect(SDL_Surface * dst, const SDL_Rect * rect, Uint32 color)
  {
      SDL_Rect clipped;
      Uint8 *pixels;
  
      if (!dst) {
          return SDL_SetError("Passed NULL destination surface");
      }
  
      /* This function doesn't work on surfaces < 8 bpp */
      if (dst->format->BitsPerPixel < 8) {
          return SDL_SetError("SDL_FillRect(): Unsupported surface format");
      }
  
      /* If 'rect' == NULL, then fill the whole surface */
      if (rect) {
          /* Perform clipping */
          if (!SDL_IntersectRect(rect, &dst->clip_rect, &clipped)) {
              return 0;
          }
          rect = &clipped;
      } else {
          rect = &dst->clip_rect;
          /* Don't attempt to fill if the surface's clip_rect is empty */
          if (SDL_RectEmpty(rect)) {
              return 0;
          }
      }
  
      /* Perform software fill */
      if (!dst->pixels) {
          return SDL_SetError("SDL_FillRect(): You must lock the surface");
      }
  
      pixels = (Uint8 *) dst->pixels + rect->y * dst->pitch +
                                       rect->x * dst->format->BytesPerPixel;
  
      switch (dst->format->BytesPerPixel) {
      case 1:
          {
              color |= (color << 8);
              color |= (color << 16);
  #ifdef __SSE__
              if (SDL_HasSSE()) {
                  SDL_FillRect1SSE(pixels, dst->pitch, color, rect->w, rect->h);
                  break;
              }
  #endif
              SDL_FillRect1(pixels, dst->pitch, color, rect->w, rect->h);
              break;
          }
  
      case 2:
          {
              color |= (color << 16);
  #ifdef __SSE__
              if (SDL_HasSSE()) {
                  SDL_FillRect2SSE(pixels, dst->pitch, color, rect->w, rect->h);
                  break;
              }
  #endif
              SDL_FillRect2(pixels, dst->pitch, color, rect->w, rect->h);
              break;
          }
  
      case 3:
          /* 24-bit RGB is a slow path, at least for now. */
          {
              SDL_FillRect3(pixels, dst->pitch, color, rect->w, rect->h);
              break;
          }
  
      case 4:
          {
  #ifdef __SSE__
              if (SDL_HasSSE()) {
                  SDL_FillRect4SSE(pixels, dst->pitch, color, rect->w, rect->h);
                  break;
              }
  #endif
              SDL_FillRect4(pixels, dst->pitch, color, rect->w, rect->h);
              break;
          }
      }
  
      /* We're done! */
      return 0;
  }
  
  int
  SDL_FillRects(SDL_Surface * dst, const SDL_Rect * rects, int count,
                Uint32 color)
  {
      int i;
      int status = 0;
  
      if (!rects) {
          return SDL_SetError("SDL_FillRects() passed NULL rects");
      }
  
      for (i = 0; i < count; ++i) {
          status += SDL_FillRect(dst, &rects[i], color);
      }
      return status;
  }
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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