Revert 0.8.22 changes: remove PictureFilterCanvas (#1013)

That approach worked but had performance issues. Also, `SkPicture` is
immutable by design, so we shouldn't try to change that.

#1014 is a more correct and efficient way to implement it

Author: MatkovIvan

skiko/src/commonMain/kotlin/org/jetbrains/skia/PictureFilterCanvas.kt

@@ -653,39 +653,6 @@ namespace skija {
         }
     }
 
-    namespace PictureFilterCanvas {
-        JavaVM* _vm;
-        jmethodID onDrawPictureId;
-
-        void onLoad(JNIEnv* env) {
-            env->GetJavaVM(&_vm);
-            jclass local = env->FindClass("org/jetbrains/skia/PictureFilterCanvas");
-            onDrawPictureId = env->GetMethodID(local, "onDrawPicture", "(JJJ)Z");
-        }
-
-        void onUnload(JNIEnv* env) {
-        }
-
-        bool onDrawPicture(jobject obj, const SkPicture* picture, const SkMatrix* matrix, const SkPaint* paint) {
-            JNIEnv *env;
-            _vm->AttachCurrentThread(AS_JNI_ENV_PTR(&env), NULL);
-            jboolean result = env->CallBooleanMethod(obj, onDrawPictureId, reinterpret_cast<jlong>(picture), reinterpret_cast<jlong>(matrix), reinterpret_cast<jlong>(paint));
-            _vm->DetachCurrentThread();
-            return result;
-        }
-
-        jobject attach(JNIEnv* env, jobject obj) {
-            return env->NewGlobalRef(obj);
-        }
-
-        void detach(jobject obj) {
-            JNIEnv *env;
-            _vm->AttachCurrentThread(AS_JNI_ENV_PTR(&env), NULL);
-            env->DeleteGlobalRef(obj);
-            _vm->DetachCurrentThread();
-        }
-    }
-
     namespace Rect {
         jclass cls;
         jmethodID makeLTRB;
@@ -930,7 +897,6 @@ namespace skija {
         PathSegment::onLoad(env);
         Point::onLoad(env);
         PaintFilterCanvas::onLoad(env);
-        PictureFilterCanvas::onLoad(env);
         Rect::onLoad(env);
         RRect::onLoad(env);
         RSXform::onLoad(env);
@@ -943,7 +909,6 @@ namespace skija {
         RRect::onUnload(env);
         Rect::onUnload(env);
         PaintFilterCanvas::onUnload(env);
-        PictureFilterCanvas::onUnload(env);
         Point::onUnload(env);
         PathSegment::onUnload(env);
         Path::onUnload(env);

skiko/src/commonTest/kotlin/org/jetbrains/skia/PictureFilterCanvasTest.kt

@@ -272,15 +272,6 @@ namespace skija {
         void detach(jobject obj);
     }
 
-    namespace PictureFilterCanvas {
-        extern jmethodID onDrawPictureId;
-        void onLoad(JNIEnv* env);
-        void onUnload(JNIEnv* env);
-        bool onDrawPicture(jobject obj, const SkPicture* picture, const SkMatrix* matrix, const SkPaint* paint);
-        jobject attach(JNIEnv* env, jobject obj);
-        void detach(jobject obj);
-    }
-
     namespace Rect {
         extern jclass cls;
         extern jmethodID makeLTRB;