static void
fz_process_mesh_type2(fz_context *ctx, fz_shade *shade, const fz_matrix *ctm, fz_mesh_processor *painter)
{
fz_point p0, p1, dir;
fz_vertex v0, v1, v2, v3;
fz_vertex e0, e1;
float theta;
float zero = 0;
float one = 1;
p0.x = shade->u.l_or_r.coords[0][0];
p0.y = shade->u.l_or_r.coords[0][1];
p1.x = shade->u.l_or_r.coords[1][0];
p1.y = shade->u.l_or_r.coords[1][1];
dir.x = p0.y - p1.y;
dir.y = p1.x - p0.x;
fz_transform_point(&p0, ctm);
fz_transform_point(&p1, ctm);
fz_transform_vector(&dir, ctm);
theta = atan2f(dir.y, dir.x);
v0.p = fz_point_on_circle(p0, HUGENUM, theta);
v1.p = fz_point_on_circle(p1, HUGENUM, theta);
v2.p = fz_point_on_circle(p0, -HUGENUM, theta);
v3.p = fz_point_on_circle(p1, -HUGENUM, theta);
fz_prepare_color(ctx, painter, &v0, &zero);
fz_prepare_color(ctx, painter, &v1, &one);
fz_prepare_color(ctx, painter, &v2, &zero);
fz_prepare_color(ctx, painter, &v3, &one);
paint_quad(ctx, painter, &v0, &v2, &v3, &v1);
if (shade->u.l_or_r.extend[0])
{
e0.p.x = v0.p.x - (p1.x - p0.x) * HUGENUM;
e0.p.y = v0.p.y - (p1.y - p0.y) * HUGENUM;
fz_prepare_color(ctx, painter, &e0, &zero);
e1.p.x = v2.p.x - (p1.x - p0.x) * HUGENUM;
e1.p.y = v2.p.y - (p1.y - p0.y) * HUGENUM;
fz_prepare_color(ctx, painter, &e1, &zero);
paint_quad(ctx, painter, &e0, &v0, &v2, &e1);
}
if (shade->u.l_or_r.extend[1])
{
e0.p.x = v1.p.x + (p1.x - p0.x) * HUGENUM;
e0.p.y = v1.p.y + (p1.y - p0.y) * HUGENUM;
fz_prepare_color(ctx, painter, &e0, &one);
e1.p.x = v3.p.x + (p1.x - p0.x) * HUGENUM;
e1.p.y = v3.p.y + (p1.y - p0.y) * HUGENUM;
fz_prepare_color(ctx, painter, &e1, &one);
paint_quad(ctx, painter, &e0, &v1, &v3, &e1);
}
}
static void
fz_paint_annulus(fz_context *ctx, const fz_matrix *ctm,
fz_point p0, float r0, float c0,
fz_point p1, float r1, float c1,
int count,
fz_mesh_processor *painter)
{
fz_vertex t0, t1, t2, t3, b0, b1, b2, b3;
float theta, step, a, b;
int i;
theta = atan2f(p1.y - p0.y, p1.x - p0.x);
step = (float)M_PI / count;
a = 0;
for (i = 1; i <= count; i++)
{
b = i * step;
t0.p = fz_point_on_circle(p0, r0, theta + a);
t1.p = fz_point_on_circle(p0, r0, theta + b);
t2.p = fz_point_on_circle(p1, r1, theta + a);
t3.p = fz_point_on_circle(p1, r1, theta + b);
b0.p = fz_point_on_circle(p0, r0, theta - a);
b1.p = fz_point_on_circle(p0, r0, theta - b);
b2.p = fz_point_on_circle(p1, r1, theta - a);
b3.p = fz_point_on_circle(p1, r1, theta - b);
fz_transform_point(&t0.p, ctm);
fz_transform_point(&t1.p, ctm);
fz_transform_point(&t2.p, ctm);
fz_transform_point(&t3.p, ctm);
fz_transform_point(&b0.p, ctm);
fz_transform_point(&b1.p, ctm);
fz_transform_point(&b2.p, ctm);
fz_transform_point(&b3.p, ctm);
fz_prepare_color(ctx, painter, &t0, &c0);
fz_prepare_color(ctx, painter, &t1, &c0);
fz_prepare_color(ctx, painter, &t2, &c1);
fz_prepare_color(ctx, painter, &t3, &c1);
fz_prepare_color(ctx, painter, &b0, &c0);
fz_prepare_color(ctx, painter, &b1, &c0);
fz_prepare_color(ctx, painter, &b2, &c1);
fz_prepare_color(ctx, painter, &b3, &c1);
paint_quad(ctx, painter, &t0, &t2, &t3, &t1);
paint_quad(ctx, painter, &b0, &b2, &b3, &b1);
a = b;
}
}
static void
fz_mesh_type5_process(fz_context *ctx, fz_shade *shade, const fz_matrix *ctm, fz_mesh_processor *painter)
{
fz_stream *stream = fz_open_compressed_buffer(ctx, shade->buffer);
fz_vertex *buf = NULL;
fz_vertex *ref = NULL;
int first;
int ncomp;
int i, k;
int vprow = shade->u.m.vprow;
int bpcoord = shade->u.m.bpcoord;
int bpcomp = shade->u.m.bpcomp;
float x0 = shade->u.m.x0;
float x1 = shade->u.m.x1;
float y0 = shade->u.m.y0;
float y1 = shade->u.m.y1;
float *c0 = shade->u.m.c0;
float *c1 = shade->u.m.c1;
fz_var(buf);
fz_var(ref);
fz_try(ctx)
{
ref = fz_malloc_array(ctx, vprow, sizeof(fz_vertex));
buf = fz_malloc_array(ctx, vprow, sizeof(fz_vertex));
first = 1;
ncomp = (shade->use_function > 0 ? 1 : shade->colorspace->n);
while (!fz_is_eof_bits(stream))
{
for (i = 0; i < vprow; i++)
{
buf[i].p.x = read_sample(stream, bpcoord, x0, x1);
buf[i].p.y = read_sample(stream, bpcoord, y0, y1);
fz_transform_point(&buf[i].p, ctm);
for (k = 0; k < ncomp; k++)
buf[i].c[k] = read_sample(stream, bpcomp, c0[k], c1[k]);
}
if (!first)
for (i = 0; i < vprow - 1; i++)
paint_quad(painter, &ref[i], &ref[i+1], &buf[i+1], &buf[i]);
SWAP(ref,buf);
first = 0;
}
}
fz_always(ctx)
{
fz_free(ctx, ref);
fz_free(ctx, buf);
fz_close(stream);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
static void
fz_process_mesh_type5(fz_context *ctx, fz_shade *shade, const fz_matrix *ctm, fz_mesh_processor *painter)
{
fz_stream *stream = fz_open_compressed_buffer(ctx, shade->buffer);
fz_vertex *buf = NULL;
fz_vertex *ref = NULL;
int first;
int ncomp = painter->ncomp;
int i, k;
int vprow = shade->u.m.vprow;
int bpcoord = shade->u.m.bpcoord;
int bpcomp = shade->u.m.bpcomp;
float x0 = shade->u.m.x0;
float x1 = shade->u.m.x1;
float y0 = shade->u.m.y0;
float y1 = shade->u.m.y1;
float *c0 = shade->u.m.c0;
float *c1 = shade->u.m.c1;
float x, y, c[FZ_MAX_COLORS];
fz_var(buf);
fz_var(ref);
fz_try(ctx)
{
ref = fz_malloc_array(ctx, vprow, sizeof(fz_vertex));
buf = fz_malloc_array(ctx, vprow, sizeof(fz_vertex));
first = 1;
while (!fz_is_eof_bits(ctx, stream))
{
for (i = 0; i < vprow; i++)
{
x = read_sample(ctx, stream, bpcoord, x0, x1);
y = read_sample(ctx, stream, bpcoord, y0, y1);
for (k = 0; k < ncomp; k++)
c[k] = read_sample(ctx, stream, bpcomp, c0[k], c1[k]);
fz_prepare_vertex(ctx, painter, &buf[i], ctm, x, y, c);
}
if (!first)
for (i = 0; i < vprow - 1; i++)
paint_quad(ctx, painter, &ref[i], &ref[i+1], &buf[i+1], &buf[i]);
SWAP(ref,buf);
first = 0;
}
}
fz_always(ctx)
{
fz_free(ctx, ref);
fz_free(ctx, buf);
fz_drop_stream(ctx, stream);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
static void
fz_paint_annulus(const fz_matrix *ctm,
fz_point p0, float r0, float c0,
fz_point p1, float r1, float c1,
fz_mesh_processor *painter)
{
fz_vertex t0, t1, t2, t3, b0, b1, b2, b3;
float theta, step;
int i;
theta = atan2f(p1.y - p0.y, p1.x - p0.x);
step = (float)M_PI * 2 / RADSEGS;
for (i = 0; i < RADSEGS / 2; i++)
{
t0.p = fz_point_on_circle(p0, r0, theta + i * step);
t1.p = fz_point_on_circle(p0, r0, theta + i * step + step);
t2.p = fz_point_on_circle(p1, r1, theta + i * step);
t3.p = fz_point_on_circle(p1, r1, theta + i * step + step);
b0.p = fz_point_on_circle(p0, r0, theta - i * step);
b1.p = fz_point_on_circle(p0, r0, theta - i * step - step);
b2.p = fz_point_on_circle(p1, r1, theta - i * step);
b3.p = fz_point_on_circle(p1, r1, theta - i * step - step);
fz_transform_point(&t0.p, ctm);
fz_transform_point(&t1.p, ctm);
fz_transform_point(&t2.p, ctm);
fz_transform_point(&t3.p, ctm);
fz_transform_point(&b0.p, ctm);
fz_transform_point(&b1.p, ctm);
fz_transform_point(&b2.p, ctm);
fz_transform_point(&b3.p, ctm);
t0.c[0] = c0;
t1.c[0] = c0;
t2.c[0] = c1;
t3.c[0] = c1;
b0.c[0] = c0;
b1.c[0] = c0;
b2.c[0] = c1;
b3.c[0] = c1;
paint_quad(painter, &t0, &t2, &t3, &t1);
paint_quad(painter, &b0, &b2, &b3, &b1);
}
}
static void
fz_mesh_type1_process(fz_context *ctx, fz_shade *shade, const fz_matrix *ctm, fz_mesh_processor *painter)
{
float *p = shade->u.f.fn_vals;
int xdivs = shade->u.f.xdivs;
int ydivs = shade->u.f.ydivs;
float x0 = shade->u.f.domain[0][0];
float y0 = shade->u.f.domain[0][1];
float x1 = shade->u.f.domain[1][0];
float y1 = shade->u.f.domain[1][1];
int xx, yy;
float y, yn, x;
fz_vertex vs[2][2];
fz_vertex *v = vs[0];
fz_vertex *vn = vs[1];
int n = shade->colorspace->n;
fz_matrix local_ctm;
fz_concat(&local_ctm, &shade->u.f.matrix, ctm);
y = y0;
for (yy = 0; yy < ydivs; yy++)
{
yn = y0 + (y1 - y0) * (yy + 1) / ydivs;
x = x0;
v[0].p.x = x; v[0].p.y = y;
fz_transform_point(&v[0].p, &local_ctm);
memcpy(v[0].c, p, n*sizeof(float));
p += n;
v[1].p.x = x; v[1].p.y = yn;
fz_transform_point(&v[1].p, &local_ctm);
memcpy(v[1].c, p + xdivs*n, n*sizeof(float));
for (xx = 0; xx < xdivs; xx++)
{
x = x0 + (x1 - x0) * (xx + 1) / xdivs;
vn[0].p.x = x; vn[0].p.y = y;
fz_transform_point(&vn[0].p, &local_ctm);
memcpy(vn[0].c, p, n*sizeof(float));
p += n;
vn[1].p.x = x; vn[1].p.y = yn;
fz_transform_point(&vn[1].p, &local_ctm);
memcpy(vn[1].c, p + xdivs*n, n*sizeof(float));
paint_quad(painter, &v[0], &vn[0], &vn[1], &v[1]);
SWAP(v,vn);
}
y = yn;
}
}
static void
triangulate_patch(fz_context *ctx, fz_mesh_processor *painter, tensor_patch p)
{
fz_vertex v0, v1, v2, v3;
v0.p = p.pole[0][0];
v1.p = p.pole[0][3];
v2.p = p.pole[3][3];
v3.p = p.pole[3][0];
fz_prepare_color(ctx, painter, &v0, p.color[0]);
fz_prepare_color(ctx, painter, &v1, p.color[1]);
fz_prepare_color(ctx, painter, &v2, p.color[2]);
fz_prepare_color(ctx, painter, &v3, p.color[3]);
paint_quad(ctx, painter, &v0, &v1, &v2, &v3);
}
static void
fz_process_mesh_type1(fz_context *ctx, fz_shade *shade, const fz_matrix *ctm, fz_mesh_processor *painter)
{
float *p = shade->u.f.fn_vals;
int xdivs = shade->u.f.xdivs;
int ydivs = shade->u.f.ydivs;
float x0 = shade->u.f.domain[0][0];
float y0 = shade->u.f.domain[0][1];
float x1 = shade->u.f.domain[1][0];
float y1 = shade->u.f.domain[1][1];
int xx, yy;
float y, yn, x;
fz_vertex vs[2][2];
fz_vertex *v = vs[0];
fz_vertex *vn = vs[1];
int n = shade->colorspace->n;
fz_matrix local_ctm;
fz_concat(&local_ctm, &shade->u.f.matrix, ctm);
y = y0;
for (yy = 0; yy < ydivs; yy++)
{
yn = y0 + (y1 - y0) * (yy + 1) / ydivs;
x = x0;
fz_prepare_vertex(ctx, painter, &v[0], &local_ctm, x, y, p);
p += n;
fz_prepare_vertex(ctx, painter, &v[1], &local_ctm, x, yn, p + xdivs * n);
for (xx = 0; xx < xdivs; xx++)
{
x = x0 + (x1 - x0) * (xx + 1) / xdivs;
fz_prepare_vertex(ctx, painter, &vn[0], &local_ctm, x, y, p);
p += n;
fz_prepare_vertex(ctx, painter, &vn[1], &local_ctm, x, yn, p + xdivs * n);
paint_quad(ctx, painter, &v[0], &vn[0], &vn[1], &v[1]);
SWAP(v,vn);
}
y = yn;
}
}
static void
triangulate_patch(fz_mesh_processor *painter, tensor_patch p)
{
fz_vertex v0, v1, v2, v3;
v0.p = p.pole[0][0];
memcpy(v0.c, p.color[0], sizeof(v0.c));
v1.p = p.pole[0][3];
memcpy(v1.c, p.color[1], sizeof(v1.c));
v2.p = p.pole[3][3];
memcpy(v2.c, p.color[2], sizeof(v2.c));
v3.p = p.pole[3][0];
memcpy(v3.c, p.color[3], sizeof(v3.c));
paint_quad(painter, &v0, &v1, &v2, &v3);
}