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Path: add arcTo and addArc, minor cleanup

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This commit is contained in:
Mis012
2025-06-10 00:48:11 +02:00
parent 6f627f7332
commit 65a7e34871
4 changed files with 108 additions and 14 deletions
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49
src/api-impl-jni/graphics/android_graphics_Path.c
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@@ -51,6 +51,44 @@ JNIEXPORT void JNICALL Java_android_graphics_Path_native_1line_1to(JNIEnv *env,
gsk_path_builder_line_to(_PTR(builder_ptr), x, y);
}
/* translated to gsk_path_builder_svg_arc_to, maybe there are more performant ways to implement this? */
void Java_android_graphics_Path_native_1arc_1to(JNIEnv *env, jclass this, jlong builder_ptr, jfloat left, jfloat top, jfloat right, jfloat bottom,
jfloat start_angle_deg, jfloat sweep_angle_deg, jboolean force_move_to)
{
GskPathBuilder *builder = _PTR(builder_ptr);
/* compute ellipse center and radii */
const graphene_point_t center = GRAPHENE_POINT_INIT((left + right) / 2.0,
(top + bottom) / 2.0);
const double rx = fabs(right - left) / 2.0;
const double ry = fabs(bottom - top) / 2.0;
/* compute points on the ellipse from angles */
const double start_angle = DEG2RAD(start_angle_deg);
const double end_angle = DEG2RAD(start_angle_deg + sweep_angle_deg);
graphene_point_t p1;
graphene_point_t p2;
graphene_point_init(&p1,
center.x + rx * cos(start_angle),
center.y + ry * sin(start_angle));
graphene_point_init(&p2,
center.x + rx * cos(end_angle),
center.y + ry * sin(end_angle));
/* handle force_move_to */
if (force_move_to)
gsk_path_builder_move_to(builder, p1.x, p1.y);
else if (!graphene_point_equal(gsk_path_builder_get_current_point(builder), &p1))
gsk_path_builder_line_to(builder, p1.x, p1.y);
/* compute flags */
const gboolean large_arc_flag = (fabs(sweep_angle_deg) >= 180.0);
const gboolean sweep_flag = (sweep_angle_deg > 0.0);
gsk_path_builder_svg_arc_to(builder, rx, ry, 0.0, large_arc_flag, sweep_flag, p2.x, p2.y);
}
JNIEXPORT void JNICALL Java_android_graphics_Path_native_1cubic_1to(JNIEnv *env, jclass this, jlong builder_ptr, jfloat x1, jfloat y1, jfloat x2, jfloat y2, jfloat x3, jfloat y3)
{
gsk_path_builder_cubic_to(_PTR(builder_ptr), x1, y1, x2, y2, x3, y3);
@@ -115,6 +153,17 @@ static gboolean path_foreach_transform(GskPathOperation op, const graphene_point
return TRUE;
}
void Java_android_graphics_Path_native_1add_1arc(JNIEnv *env, jclass this, jlong builder_ptr, jfloat left, jfloat top, jfloat right, jfloat bottom,
jfloat start_angle_deg, jfloat sweep_angle_deg)
{
GskPathBuilder *builder = _PTR(builder_ptr);
GskPath *path;
GskPathBuilder *arc_builder = gsk_path_builder_new();
Java_android_graphics_Path_native_1arc_1to(env, this, _INTPTR(arc_builder), left, top, right, bottom, start_angle_deg, sweep_angle_deg, true);
path = gsk_path_builder_free_to_path(arc_builder);
gsk_path_builder_add_path(builder, path);
}
JNIEXPORT void JNICALL Java_android_graphics_Path_native_1add_1path(JNIEnv *env, jclass this, jlong builder_ptr, jlong path_ptr, jlong matrix_ptr)
{
GskPathBuilder *builder = _PTR(builder_ptr);