diff options
Diffstat (limited to 'fb.c')
| -rw-r--r-- | fb.c | 82 |
1 files changed, 78 insertions, 4 deletions
@@ -8,6 +8,74 @@ #include "graphics.h" #include "internal.h" +/* + * scale[234]x filters + * + * see https://www.scale2x.it/algorithm + */ +static void +scale2x_filter(ulong *dst, Framebuf *fb, Point *sp) +{ + ulong B, D, E, F, H; + + E = getpixel(fb, *sp); + B = sp->y == fb->r.min.y? E: getpixel(fb, addpt(*sp, Pt( 0,-1))); + D = sp->x == fb->r.min.x? E: getpixel(fb, addpt(*sp, Pt(-1, 0))); + F = sp->x == fb->r.max.x? E: getpixel(fb, addpt(*sp, Pt( 1, 0))); + H = sp->y == fb->r.max.y? E: getpixel(fb, addpt(*sp, Pt( 0, 1))); + + if(B != H && D != F){ + dst[0] = D == B? D: E; + dst[1] = B == F? F: E; + dst[2] = D == H? D: E; + dst[3] = H == F? F: E; + }else + memsetl(dst, E, 4); +} + +static void +scale3x_filter(ulong *dst, Framebuf *fb, Point *sp) +{ + ulong A, B, C, D, E, F, G, H, I; + + E = getpixel(fb, *sp); + B = sp->y == fb->r.min.y? E: getpixel(fb, addpt(*sp, Pt( 0,-1))); + D = sp->x == fb->r.min.x? E: getpixel(fb, addpt(*sp, Pt(-1, 0))); + F = sp->x == fb->r.max.x? E: getpixel(fb, addpt(*sp, Pt( 1, 0))); + H = sp->y == fb->r.max.y? E: getpixel(fb, addpt(*sp, Pt( 0, 1))); + A = sp->y == fb->r.min.y && sp->x == fb->r.min.x? E: + sp->y == fb->r.min.y? D: sp->x == fb->r.min.x? B: + getpixel(fb, addpt(*sp, Pt(-1,-1))); + C = sp->y == fb->r.min.y && sp->x == fb->r.max.x? E: + sp->y == fb->r.min.y? F: sp->x == fb->r.max.x? B: + getpixel(fb, addpt(*sp, Pt( 1,-1))); + G = sp->y == fb->r.max.y && sp->x == fb->r.min.x? E: + sp->y == fb->r.max.y? D: sp->x == fb->r.min.x? H: + getpixel(fb, addpt(*sp, Pt(-1, 1))); + I = sp->y == fb->r.max.y && sp->x == fb->r.max.x? E: + sp->y == fb->r.max.y? F: sp->x == fb->r.max.x? H: + getpixel(fb, addpt(*sp, Pt( 1, 1))); + + if(B != H && D != F){ + dst[0] = D == B? D: E; + dst[1] = (D == B && E != C) || (B == F && E != A)? B: E; + dst[2] = B == F? F: E; + dst[3] = (D == B && E != G) || (D == H && E != A)? D: E; + dst[4] = E; + dst[5] = (B == F && E != I) || (H == F && E != C)? F: E; + dst[6] = D == H? D: E; + dst[7] = (D == H && E != I) || (H == F && E != G)? H: E; + dst[8] = H == F? F: E; + }else + memsetl(dst, E, 9); +} + +//static void +//scale4x_filter(ulong *dst, Framebuf *fb, Point *sp) +//{ +// +//} + static void framebufctl_draw(Framebufctl *ctl, Image *dst) { @@ -35,8 +103,11 @@ framebufctl_upscaledraw(Framebufctl *ctl, Image *dst, Point scale) fb = ctl->getfb(ctl); for(sp.y = fb->r.min.y, dp.y = dst->r.min.y; sp.y < fb->r.max.y; sp.y++, dp.y += scale.y) for(sp.x = fb->r.min.x, dp.x = dst->r.min.x; sp.x < fb->r.max.x; sp.x++, dp.x += scale.x){ - for(i = 0; i < scale.x*scale.y; i++) - blk[i] = fb->cb[Dx(fb->r)*sp.y + sp.x]; + /*if(scale.x == 2 && scale.y == 2) + scale2x_filter(blk, fb, &sp); + else if(scale.x == 3 && scale.y == 3) + scale3x_filter(blk, fb, &sp); + else */memsetl(blk, getpixel(fb, sp), scale.x*scale.y); loadimage(dst, rectaddpt(blkr, dp), (uchar*)blk, scale.x*scale.y*4); } qunlock(ctl); @@ -70,8 +141,11 @@ framebufctl_upscalememdraw(Framebufctl *ctl, Memimage *dst, Point scale) fb = ctl->getfb(ctl); for(sp.y = fb->r.min.y, dp.y = dst->r.min.y; sp.y < fb->r.max.y; sp.y++, dp.y += scale.y) for(sp.x = fb->r.min.x, dp.x = dst->r.min.x; sp.x < fb->r.max.x; sp.x++, dp.x += scale.x){ - for(i = 0; i < scale.x*scale.y; i++) - blk[i] = fb->cb[Dx(fb->r)*sp.y + sp.x]; + /*if(scale.x == 2 && scale.y == 2) + scale2x_filter(blk, fb, &sp); + else if(scale.x == 3 && scale.y == 3) + scale3x_filter(blk, fb, &sp); + else */memsetl(blk, getpixel(fb, sp), scale.x*scale.y); loadmemimage(dst, rectaddpt(blkr, dp), (uchar*)blk, scale.x*scale.y*4); } qunlock(ctl); |