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grad.c: Refactor __imlib_DrawGradient() and __imlib_DrawHsvaGradient()

This commit is contained in:
Kim Woelders 2022-03-06 22:51:35 +01:00
parent 4529fcf678
commit ef2177df8e
1 changed files with 22 additions and 202 deletions
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224
src/lib/grad.c
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@ -235,19 +235,23 @@ __imlib_MapHsvaRange(ImlibRange * rg, int len)
return map;
}
void
__imlib_DrawGradient(ImlibImage * im, int x, int y, int w, int h,
ImlibRange * rg, double angle, ImlibOp op,
int clx, int cly, int clw, int clh)
typedef DATA32 *(ImlibRangeMapFunc) (ImlibRange * rg, int len);
static void
_DrawGradient(ImlibImage * im, int x, int y, int w, int h,
ImlibRange * rg, double angle, ImlibOp op,
int clx, int cly, int clw, int clh, ImlibRangeMapFunc * rmf)
{
DATA32 *map, *p;
int *hlut, *vlut, len = 0, xx, yy, xoff = 0, yoff =
0, ww, hh, jump;
int *hlut, *vlut, len;
int xx, yy, xoff, yoff, ww, hh, jump;
int tmp, i, divw, divh;
DATA8 r, g, b, a;
xoff = yoff = 0;
ww = w;
hh = h;
if (x < 0)
{
w += x;
@ -300,7 +304,7 @@ __imlib_DrawGradient(ImlibImage * im, int x, int y, int w, int h,
len = ww * 16;
else
len = hh * 16;
map = __imlib_MapRange(rg, len);
map = rmf(rg, len);
if (!map)
goto quit;
@ -437,204 +441,20 @@ __imlib_DrawGradient(ImlibImage * im, int x, int y, int w, int h,
free(map);
}
void
__imlib_DrawGradient(ImlibImage * im, int x, int y, int w, int h,
ImlibRange * rg, double angle, ImlibOp op,
int clx, int cly, int clw, int clh)
{
_DrawGradient(im, x, y, w, h, rg, angle, op, clx, cly, clw, clh,
__imlib_MapRange);
}
void
__imlib_DrawHsvaGradient(ImlibImage * im, int x, int y, int w, int h,
ImlibRange * rg, double angle, ImlibOp op,
int clx, int cly, int clw, int clh)
{
DATA32 *map, *p;
int *hlut, *vlut, len = 0, xx, yy, xoff = 0, yoff =
0, ww, hh, jump;
int tmp, i, divw, divh;
DATA8 r, g, b, a;
ww = w;
hh = h;
if (x < 0)
{
w += x;
xoff = -x;
x = 0;
}
if (w <= 0)
return;
if ((x + w) > im->w)
w = (im->w - x);
if (w <= 0)
return;
if (y < 0)
{
h += y;
yoff = -y;
y = 0;
}
if (h <= 0)
return;
if ((y + h) > im->h)
h = (im->h - y);
if (h <= 0)
return;
if (clw)
{
int px, py;
CLIP_TO(clx, cly, clw, clh, 0, 0, im->w, im->h);
px = x;
py = y;
CLIP_TO(x, y, w, h, clx, cly, clw, clh);
if ((w < 1) || (h < 1))
return;
xoff += (x - px);
yoff += (y - py);
}
vlut = NULL;
map = NULL;
hlut = malloc(sizeof(int) * ww);
if (!hlut)
goto quit;
vlut = malloc(sizeof(int) * hh);
if (!vlut)
goto quit;
if (ww > hh)
len = ww * 16;
else
len = hh * 16;
map = __imlib_MapHsvaRange(rg, len);
if (!map)
goto quit;
xx = (int)(32 * sin(((angle + 180) * 2 * 3.141592654) / 360));
yy = -(int)(32 * cos(((angle + 180) * 2 * 3.141592654) / 360));
divw = ((ww - 1) << 5);
divh = ((hh - 1) << 5);
if (divw < 1)
divw = 1;
if (divh < 1)
divh = 1;
if (xx < 0)
{
for (i = 0; i < ww; i++)
hlut[i] = (-xx * (ww - 1 - i) * len) / divw;
}
else
{
for (i = 0; i < ww; i++)
hlut[i] = (xx * i * len) / divw;
}
if (yy < 0)
{
for (i = 0; i < hh; i++)
vlut[i] = (-yy * (hh - 1 - i) * len) / divh;
}
else
{
for (i = 0; i < hh; i++)
vlut[i] = (yy * i * len) / divh;
}
jump = im->w - w;
p = im->data + (y * im->w) + x;
switch (op)
{
case OP_COPY:
if (IM_FLAG_ISSET(im, F_HAS_ALPHA))
{
__imlib_build_pow_lut();
for (yy = 0; yy < h; yy++)
{
for (xx = 0; xx < w; xx++)
{
i = vlut[yoff + yy] + hlut[xoff + xx];
if (i < 0)
i = 0;
else if (i >= len)
i = len - 1;
ARGB_TO_R_G_B_A(map[i], r, g, b, a);
BLEND_DST_ALPHA(r, g, b, a, p);
p++;
}
p += jump;
}
}
else
{
for (yy = 0; yy < h; yy++)
{
for (xx = 0; xx < w; xx++)
{
i = vlut[yoff + yy] + hlut[xoff + xx];
if (i < 0)
i = 0;
else if (i >= len)
i = len - 1;
ARGB_TO_R_G_B_A(map[i], r, g, b, a);
BLEND(r, g, b, a, p);
p++;
}
p += jump;
}
}
break;
case OP_ADD:
for (yy = 0; yy < h; yy++)
{
for (xx = 0; xx < w; xx++)
{
i = vlut[yoff + yy] + hlut[xoff + xx];
if (i < 0)
i = 0;
else if (i >= len)
i = len - 1;
ARGB_TO_R_G_B_A(map[i], r, g, b, a);
BLEND_SUB(r, g, b, a, p);
p++;
}
p += jump;
}
break;
case OP_SUBTRACT:
for (yy = 0; yy < h; yy++)
{
for (xx = 0; xx < w; xx++)
{
i = vlut[yoff + yy] + hlut[xoff + xx];
if (i < 0)
i = 0;
else if (i >= len)
i = len - 1;
ARGB_TO_R_G_B_A(map[i], r, g, b, a);
BLEND_SUB(r, g, b, a, p);
p++;
}
p += jump;
}
break;
case OP_RESHADE:
for (yy = 0; yy < h; yy++)
{
for (xx = 0; xx < w; xx++)
{
i = vlut[yoff + yy] + hlut[xoff + xx];
if (i < 0)
i = 0;
else if (i >= len)
i = len - 1;
ARGB_TO_R_G_B_A(map[i], r, g, b, a);
BLEND_RE(r, g, b, a, p);
p++;
}
p += jump;
}
break;
default:
break;
}
quit:
free(vlut);
free(hlut);
free(map);
_DrawGradient(im, x, y, w, h, rg, angle, op, clx, cly, clw, clh,
__imlib_MapHsvaRange);
}