SGAtlas* SG_CALL sgAtlasCreateTexture(SGTexture* texture, SGbool owner)
{
SGAtlas* atlas = sgAtlasCreate(sgTextureGetWidth(texture), sgTextureGetHeight(texture), sgTextureGetBPP(texture));
if(!atlas) return NULL;
_sgAtlasAddTexture(atlas, texture, owner);
return atlas;
}
SGMask* SG_EXPORT sgMaskCreateTexture2i(SGTexture* texture, SGint xoffset, SGint yoffset)
{
SGMask* mask = malloc(sizeof(SGMask));
if(mask == NULL)
return NULL;
SGuint i, j;
mask->width = sgTextureGetWidth(texture);
mask->height = sgTextureGetHeight(texture);
mask->xoffset = xoffset;
mask->yoffset = yoffset;
mask->precise = SG_TRUE;
mask->field = malloc(mask->width * sizeof(SGbool*));
for(i = 0; i < mask->width; i++)
mask->field[i] = calloc(mask->height, sizeof(SGbool));
SGuint awidth = 0;
SGuint aheight = 0;
SGuint bpp = 0;
char* data = NULL;
if(psgmGraphicsTextureGetData != NULL)
psgmGraphicsTextureGetData(texture->handle, &awidth, &aheight, &bpp, (void**)&data);
/*SGubyte bypp = 0;*/
SGubyte r, g, b, a;
SGubyte rbits = 0;
SGubyte gbits = 0;
SGubyte bbits = 0;
SGubyte abits = 0;
switch(bpp)
{
case 32:
rbits = 8;
gbits = 8;
bbits = 8;
abits = 8;
/*bypp = 4;*/
break;
case 24:
rbits = 8;
gbits = 8;
bbits = 8;
/*bypp = 3;*/
break;
case 16:
rbits = 5;
gbits = 6;
bbits = 5;
/*bypp = 2;*/
break;
case 15:
rbits = 5;
gbits = 5;
bbits = 5;
abits = 1; // ?
/*bypp = 2;*/
break;
case 8:
abits = 8;
/*bypp = 1;*/
break;
default:
fprintf(stderr, "Unsupported BPP '%d'\n", bpp);
}
float col[4];
sgDrawGetColor4fv(col);
r = (SGubyte)(col[0] * ((1 << rbits) - 1));
g = (SGubyte)(col[1] * ((1 << gbits) - 1));
b = (SGubyte)(col[2] * ((1 << bbits) - 1));
a = (SGubyte)(col[3] * ((1 << abits) - 1));
SGuint ui = a
| (b << abits)
| (g << (abits + bbits))
| (r << (abits + bbits + gbits));
for(i = 0; i < mask->width; i++)
{
for(j = 0; j < mask->height; j++)
{
switch(bpp)
{
case 32:
mask->field[i][j] = data[(j * awidth + i) * 4 + 3] ? SG_TRUE : SG_FALSE;
break;
case 24:
mask->field[i][j] = (data[(j * awidth + i) * 3 + 0] == r)
&& (data[(j * awidth + i) * 3 + 1] == g)
&& (data[(j * awidth + i) * 3 + 2] == b);
break;
case 16:
case 15:
mask->field[i][j] = *(SGushort*)&data[(j * awidth + i) * 2] == ui;
break;
case 8:
mask->field[i][j] = data[(j * awidth + i)] == a;
break;
}
}
}
psgmGraphicsTextureFreeData(data);
return mask;
}
