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Fixed bug 1822 - Inconsistent renderer behaviour on rotation 

Sylvain 2016-11-07 08:49:34 UTC

when rotated +90 or -90, some transparent lines appears, though there is no Alpha or ColorKey.

if you set a dummy colorkey, it will remove the line ...
if you set a some alpha mod, the +90/-90 get transparent but not the 0/180  ...
This commit is contained in:
Sam Lantinga 2016-11-11 13:38:39 -08:00
parent 23c01c1890
commit 77000ff8cb
1 changed files with 15 additions and 11 deletions
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22
src/render/software/SDL_rotate.c
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@ -417,7 +417,7 @@ SDLgfx_rotateSurface(SDL_Surface * src, double angle, int centerx, int centery,
SDL_Surface *rz_dst;
int is32bit, angle90;
int i;
Uint8 r = 0, g = 0, b = 0;
Uint8 r = 0, g = 0, b = 0, a = 0;
Uint32 colorkey = 0;
int colorKeyAvailable = 0;
double sangleinv, cangleinv;
@ -428,12 +428,12 @@ SDLgfx_rotateSurface(SDL_Surface * src, double angle, int centerx, int centery,
if (src == NULL)
return (NULL);
if (src->flags & SDL_TRUE/* SDL_SRCCOLORKEY */)
{
if (src->flags & SDL_TRUE/* SDL_SRCCOLORKEY */) {
colorkey = _colorkey(src);
SDL_GetRGB(colorkey, src->format, &r, &g, &b);
SDL_GetRGBA(colorkey, src->format, &r, &g, &b, &a);
colorKeyAvailable = 1;
}
/*
* Determine if source surface is 32bit or 8bit
*/
@ -485,10 +485,10 @@ SDLgfx_rotateSurface(SDL_Surface * src, double angle, int centerx, int centery,
/* Adjust for guard rows */
rz_dst->h = dstheight;
if (colorKeyAvailable == 1){
colorkey = SDL_MapRGB(rz_dst->format, r, g, b);
if (colorKeyAvailable == 1) {
colorkey = SDL_MapRGBA(rz_dst->format, r, g, b, a);
SDL_FillRect(rz_dst, NULL, colorkey );
SDL_FillRect(rz_dst, NULL, colorkey);
}
/*
@ -526,7 +526,6 @@ SDLgfx_rotateSurface(SDL_Surface * src, double angle, int centerx, int centery,
* Turn on source-alpha support
*/
/* SDL_SetAlpha(rz_dst, SDL_SRCALPHA, 255); */
SDL_SetColorKey(rz_dst, /* SDL_SRCCOLORKEY */ SDL_TRUE | SDL_RLEACCEL, _colorkey(rz_src));
} else {
/*
* Copy palette and colorkey info
@ -543,7 +542,12 @@ SDLgfx_rotateSurface(SDL_Surface * src, double angle, int centerx, int centery,
} else {
transformSurfaceY(rz_src, rz_dst, centerx, centery, (int)(sangleinv), (int)(cangleinv), flipx, flipy);
}
SDL_SetColorKey(rz_dst, /* SDL_SRCCOLORKEY */ SDL_TRUE | SDL_RLEACCEL, _colorkey(rz_src));
}
if (colorKeyAvailable == 1) {
SDL_SetColorKey(rz_dst, /* SDL_SRCCOLORKEY */ SDL_TRUE | SDL_RLEACCEL, colorkey);
} else {
SDL_SetColorKey(rz_dst, SDL_FALSE, 0);
}
/* copy alpha mod, color mod, and blend mode */