四个方向分块渲染

2026-08-12 09:01:25 +08:00
parent b34c0d31b1
commit 9331b4cbf6
24 changed files with 788 additions and 108 deletions
@@ -222,6 +222,24 @@ Painter::~Painter() {
        context_.end();
 }

+void Painter::clip(RectF value) {
+    value = value.normalized();
+    if (!active_ || value.empty())
+        return;
+    context_.clip_to_rect(BLRect(value.x, value.y, value.width, value.height));
+}
+
+void Painter::composite(const Blend2D_Color_Cache& source) {
+    if (!active_ || source.image_.is_empty())
+        return;
+    const Size source_size = source.size();
+    context_.blit_image(BLRect(0.0, 0.0,
+                              static_cast<double>(source_size.width),
+                              static_cast<double>(source_size.height)),
+                        source.image_,
+                        BLRectI(0, 0, source_size.width, source_size.height));
+}
+
 BLRgba Painter::rgba(Color color) noexcept {
    constexpr double scale = 1.0 / 255.0;
    return BLRgba(color.r * scale, color.g * scale, color.b * scale, color.a * scale);