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Implemented scanlines in pure SDL mode

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git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@454 8092fc87-c524-0410-9efc-e669fe64eaf9
This commit is contained in:
gewlitys
2002-12-21 00:25:07 +00:00
parent 1ec0d24c07
commit 27a089fa04
1 changed files with 82 additions and 4 deletions
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sc2/src/sc2code/libs/graphics/sdl/pure.c
+82 -4
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@@ -23,6 +23,7 @@
static SDL_Surface *fade_black;
static SDL_Surface *fade_white;
static SDL_Surface *fade_temp;
static int gfx_flags;
int
TFB_Pure_InitGraphics (int driver, int flags, int width, int height, int bpp)
@@ -32,6 +33,7 @@ TFB_Pure_InitGraphics (int driver, int flags, int width, int height, int bpp)
SDL_Surface *test_extra;
GraphicsDriver = driver;
gfx_flags = flags;
fprintf (stderr, "Initializing SDL (pure).\n");
@@ -244,6 +246,79 @@ static void Scale2x_Nearest (Uint8 bytesperpixel, Uint8 *src_p, Uint8 *dst_p, co
}
}
static void ScanLines (SDL_Surface *dst)
{
Uint8 *pixels = (Uint8 *) dst->pixels;
SDL_PixelFormat *fmt = dst->format;
int x, y;
switch (dst->format->BytesPerPixel)
{
case 2:
{
for (y = 0; y < dst->h; y += 2)
{
Uint16 *p = (Uint16 *) &pixels[y * dst->pitch];
for (x = 0; x < dst->w; ++x)
{
*p++ = ((((*p & fmt->Rmask) >> 2) * 3) & fmt->Rmask) +
((((*p & fmt->Gmask) >> 2) * 3) & fmt->Gmask) +
((((*p & fmt->Bmask) >> 2) * 3) & fmt->Bmask);
}
}
break;
}
case 3:
{
for (y = 0; y < dst->h; y += 2)
{
Uint8 *p = (Uint8 *) &pixels[y * dst->pitch];
Uint32 pixval;
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
for (x = 0; x < dst->w; ++x)
{
pixval = p[0] << 16 | p[1] << 8 | p[2];
pixval = ((((pixval & fmt->Rmask) >> 2) * 3) & fmt->Rmask) +
((((pixval & fmt->Gmask) >> 2) * 3) & fmt->Gmask) +
((((pixval & fmt->Bmask) >> 2) * 3) & fmt->Bmask);
p[0] = (pixval >> 16) & 0xff;
p[1] = (pixval >> 8) & 0xff;
p[2] = pixval & 0xff;
p += 3;
}
#else
for (x = 0; x < dst->w; ++x)
{
pixval = p[0] | p[1] << 8 | p[2] << 16;
pixval = ((((pixval & fmt->Rmask) >> 2) * 3) & fmt->Rmask) +
((((pixval & fmt->Gmask) >> 2) * 3) & fmt->Gmask) +
((((pixval & fmt->Bmask) >> 2) * 3) & fmt->Bmask);
p[0] = pixval & 0xff;
p[1] = (pixval >> 8) & 0xff;
p[2] = (pixval >> 16) & 0xff;
p += 3;
}
#endif
}
break;
}
case 4:
{
for (y = 0; y < dst->h; y += 2)
{
Uint32 *p = (Uint32 *) &pixels[y * dst->pitch];
for (x = 0; x < dst->w; ++x)
{
*p++ = ((((*p & fmt->Rmask) >> 2) * 3) & fmt->Rmask) +
((((*p & fmt->Gmask) >> 2) * 3) & fmt->Gmask) +
((((*p & fmt->Bmask) >> 2) * 3) & fmt->Bmask);
}
}
break;
}
}
}
void
TFB_Pure_SwapBuffers ()
{
@@ -287,11 +362,14 @@ TFB_Pure_SwapBuffers ()
}
SDL_LockSurface (SDL_Video);
SDL_LockSurface (backbuffer);
Scale2x_Nearest (SDL_Screen->format->BytesPerPixel, backbuffer->pixels, SDL_Video->pixels, 240);
SDL_UnlockSurface (backbuffer);
SDL_LockSurface (backbuffer);
Scale2x_Nearest (SDL_Screen->format->BytesPerPixel, backbuffer->pixels, SDL_Video->pixels, 240);
if (gfx_flags & TFB_GFXFLAGS_SCANLINES)
ScanLines (SDL_Video);
SDL_UnlockSurface (backbuffer);
SDL_UnlockSurface (SDL_Video);
}
else