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Some optimizations to TFB_Pure_SwapBuffers

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git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@78 8092fc87-c524-0410-9efc-e669fe64eaf9
This commit is contained in:
gewlitys
2002-09-25 14:44:24 +00:00
parent a51ac6b2ee
commit bee1156382
1 changed files with 69 additions and 55 deletions
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sc2/src/sc2code/libs/graphics/sdl/pure.c
+46 -32
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@@ -132,10 +132,18 @@ TFB_Pure_InitGraphics (int driver, int flags, int width, int height, int bpp)
void
TFB_Pure_SwapBuffers ()
{
SDL_Surface *backbuffer = SDL_Screen;
int fade_amount = FadeAmount;
int transition_amount = TransitionAmount;
if (ScreenWidth == 320 && ScreenHeight == 240 &&
ScreenWidthActual == 640 && ScreenHeightActual == 480)
{
// scales 320x240 backbuffer to 640x480
int x, y;
Uint8 *src_p, *src_p2, *dst_p;
SDL_Surface *backbuffer = SDL_Screen;
if (transition_amount != 255)
{
backbuffer = fade_temp;
@@ -165,14 +173,6 @@ TFB_Pure_SwapBuffers ()
}
}
if (ScreenWidth == 320 && ScreenHeight == 240 &&
ScreenWidthActual == 640 && ScreenHeightActual == 480)
{
// scales 320x240 backbuffer to 640x480
int x, y;
Uint8 *src_p, *src_p2, *dst_p;
SDL_LockSurface (SDL_Video);
SDL_LockSurface (backbuffer);
@@ -186,7 +186,7 @@ TFB_Pure_SwapBuffers ()
Uint8 pixval_8;
for (y = 0; y < 240; ++y)
{
src_p2 = src_p;
src_p2 = dst_p;
for (x = 0; x < 320; ++x)
{
pixval_8 = *src_p++;
@@ -194,13 +194,11 @@ TFB_Pure_SwapBuffers ()
*dst_p++ = pixval_8;
*dst_p++ = pixval_8;
}
src_p = src_p2;
for (x = 0; x < 320; ++x)
for (x = 0; x < 160; ++x)
{
pixval_8 = *src_p++;
*dst_p++ = pixval_8;
*dst_p++ = pixval_8;
*(Uint32*)dst_p = *(Uint32*)src_p2;
dst_p += 4;
src_p2 += 4;
}
}
break;
@@ -210,27 +208,22 @@ TFB_Pure_SwapBuffers ()
Uint16 pixval_16;
for (y = 0; y < 240; ++y)
{
src_p2 = src_p;
src_p2 = dst_p;
for (x = 0; x < 320; ++x)
{
pixval_16 = *(Uint16*)src_p++;
src_p++;
pixval_16 = *(Uint16*)src_p;
src_p += 2;
*(Uint16*)dst_p++ = pixval_16;
dst_p++;
*(Uint16*)dst_p++ = pixval_16;
dst_p++;
*(Uint16*)dst_p = pixval_16;
dst_p += 2;
*(Uint16*)dst_p = pixval_16;
dst_p += 2;
}
src_p = src_p2;
for (x = 0; x < 320; ++x)
{
pixval_16 = *(Uint16*)src_p++;
src_p++;
*(Uint16*)dst_p++ = pixval_16;
dst_p++;
*(Uint16*)dst_p++ = pixval_16;
dst_p++;
*(Uint32*)dst_p = *(Uint32*)src_p2;
dst_p += 4;
src_p2 += 4;
}
}
break;
@@ -304,7 +297,28 @@ TFB_Pure_SwapBuffers ()
else
{
// resolution is 320x240 so we can blit directly
SDL_BlitSurface (backbuffer, NULL, SDL_Video, NULL);
SDL_BlitSurface (SDL_Screen, NULL, SDL_Video, NULL);
if (transition_amount != 255)
{
SDL_SetAlpha (TransitionScreen, SDL_SRCALPHA, 255 - transition_amount);
SDL_BlitSurface (TransitionScreen, &TransitionClipRect, SDL_Video, &TransitionClipRect);
}
if (fade_amount != 255)
{
if (fade_amount < 255)
{
SDL_SetAlpha (fade_black, SDL_SRCALPHA, 255 - fade_amount);
SDL_BlitSurface (fade_black, NULL, SDL_Video, NULL);
}
else
{
SDL_SetAlpha (fade_white, SDL_SRCALPHA, fade_amount - 255);
SDL_BlitSurface (fade_white, NULL, SDL_Video, NULL);
}
}
}
SDL_UpdateRect (SDL_Video, 0, 0, 0, 0);