static void
RenderPalette(AG_HSVPal *pal)
{
AG_Surface *ds = pal->surface;
float h, cur_h, cur_s, cur_v;
AG_Color C;
Uint32 px;
/* Uint8 da; */
int x, y, i;
AG_Rect rd;
AG_FillRect(ds, NULL, AG_ColorRGB(0,0,0));
cur_h = (AG_GetFloat(pal, "hue")/360) * 2*AG_PI;
cur_s = AG_GetFloat(pal, "saturation");
cur_v = AG_GetFloat(pal, "value");
/* Render the circle of hues. */
for (h = 0.0; h < 2*AG_PI; h += pal->circle.dh) {
AG_HSV2RGB((h/(2*AG_PI)*360.0), 1.0, 1.0, &C.r, &C.g, &C.b);
px = AG_MapColorRGB(ds->format, C);
for (i = 0; i < pal->circle.width; i++) {
x = (pal->circle.rout - i)*Cos(h);
y = (pal->circle.rout - i)*Sin(h);
AG_PUT_PIXEL2(ds,
pal->circle.x+x,
pal->circle.y+y,
px);
}
}
/* Render the triangle of saturation and value. */
for (y = 0; y < pal->triangle.h; y += 2) {
float sat = (float)(pal->triangle.h - y) /
(float)(pal->triangle.h);
for (x = 0; x < y; x++) {
AG_HSV2RGB((cur_h/(2*AG_PI))*360.0, sat,
1.0 - ((float)x/(float)pal->triangle.h),
&C.r, &C.g, &C.b);
px = AG_MapColorRGB(ds->format, C);
AG_PUT_PIXEL2(ds,
pal->triangle.x + x - y/2,
pal->triangle.y + y,
px);
AG_PUT_PIXEL2(ds,
pal->triangle.x + x - y/2,
pal->triangle.y + y + 1,
px);
}
}
if (!(pal->flags & AG_HSVPAL_NOALPHA)) {
/* Render the color preview. */
/* XXX overblending */
for (y = 8; y < pal->rAlpha.h+16; y+=8) {
for (x = 0; x < pal->rAlpha.w; x+=16) {
rd.w = 8;
rd.h = 8;
rd.x = pal->rAlpha.x+x;
rd.y = pal->rAlpha.y+y;
AG_FillRect(ds, &rd, pal->cTile);
}
y += 8;
for (x = 8; x < pal->rAlpha.w; x+=16) {
rd.w = 8;
rd.h = 8;
rd.x = pal->rAlpha.x+x;
rd.y = pal->rAlpha.y+y;
AG_FillRect(ds, &rd, pal->cTile);
}
}
AG_HSV2RGB((cur_h/(2*AG_PI))*360.0, cur_s, cur_v,
&C.r, &C.g, &C.b);
/* da = MIN(1, ds->w/255); */
for (y = pal->rAlpha.y+8; y < ds->h; y++) {
for (x = 0, C.a = 0;
x < ds->w;
x++) {
AG_BLEND_RGBA2(ds, x, y,
C.r, C.g, C.b, C.a, AG_ALPHA_SRC);
C.a = x*255/ds->w;
}
}
}
}
void
RG_FillApply(void *p, RG_Tile *t, int x, int y)
{
struct rg_fill_feature *fi = p;
AG_Surface *su = t->su;
AG_Color C;
Uint8 a;
switch (fi->type) {
case FILL_SOLID:
AG_FillRect(su, NULL, fi->f_solid.c);
break;
case FILL_HGRADIENT:
{
int x, y;
AG_Color c1 = fi->f_gradient.c1;
AG_Color c2 = fi->f_gradient.c2;
C.a = fi->alpha;
for (y = 0; y < su->h; y++) {
a = (Uint8)(su->h-y)*255/su->h;
C.r = (((c1.r - c2.r)*a)>>8) + c2.r;
C.g = (((c1.g - c2.g)*a)>>8) + c2.g;
C.b = (((c1.b - c2.b)*a)>>8) + c2.b;
if (fi->alpha == 255) {
for (x = 0; x < su->w; x++) {
RG_PutPixel(t->su, x, y,
AG_MapColorRGB(t->su->format, C));
}
} else {
for (x = 0; x < su->w; x++) {
RG_BlendRGB(t->su, x, y,
RG_PRIM_OVERLAY_ALPHA,
C);
}
}
}
}
break;
case FILL_VGRADIENT:
{
int x, y;
AG_Color c1 = fi->f_gradient.c1;
AG_Color c2 = fi->f_gradient.c2;
C.a = fi->alpha;
for (y = 0; y < su->h; y++) {
for (x = 0; x < su->w; x++) {
a = (su->h - x)*255/su->h;
C.r = (((c1.r - c2.r)*a)>>8) + c2.r;
C.g = (((c1.g - c2.g)*a)>>8) + c2.g;
C.b = (((c1.b - c2.b)*a)>>8) + c2.b;
RG_BlendRGB(t->su, x, y,
RG_PRIM_OVERLAY_ALPHA, C);
}
}
}
break;
case FILL_CGRADIENT:
{
int i, r = MAX(su->w,su->h);
int x = su->w/2;
int y = su->h/2;
AG_Color c1 = fi->f_gradient.c1;
AG_Color c2 = fi->f_gradient.c2;
C.a = fi->alpha;
for (i = 0; i < r; i++) {
a = (r - i)*255/r;
C.r = (((c1.r - c2.r)*a)>>8) + c2.r;
C.g = (((c1.g - c2.g)*a)>>8) + c2.g;
C.b = (((c1.b - c2.b)*a)>>8) + c2.b;
RG_ColorRGBA(t, C);
RG_Circle2(t, x,y, i);
}
}
break;
default:
break;
}
}