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      1 /* libs/android_runtime/android/graphics/ColorFilter.cpp
      2 **
      3 ** Copyright 2006, The Android Open Source Project
      4 **
      5 ** Licensed under the Apache License, Version 2.0 (the "License");
      6 ** you may not use this file except in compliance with the License.
      7 ** You may obtain a copy of the License at
      8 **
      9 **     http://www.apache.org/licenses/LICENSE-2.0
     10 **
     11 ** Unless required by applicable law or agreed to in writing, software
     12 ** distributed under the License is distributed on an "AS IS" BASIS,
     13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14 ** See the License for the specific language governing permissions and
     15 ** limitations under the License.
     16 */
     17 
     18 #include "jni.h"
     19 #include "GraphicsJNI.h"
     20 #include "core_jni_helpers.h"
     21 
     22 #include "SkColorFilter.h"
     23 #include "SkColorMatrixFilter.h"
     24 #include "SkXfermode.h"
     25 
     26 #include <Caches.h>
     27 
     28 namespace android {
     29 
     30 using namespace uirenderer;
     31 
     32 class SkColorFilterGlue {
     33 public:
     34     static void finalizer(JNIEnv* env, jobject clazz, jlong skFilterHandle) {
     35         SkColorFilter* filter = reinterpret_cast<SkColorFilter *>(skFilterHandle);
     36         if (filter) SkSafeUnref(filter);
     37     }
     38 
     39     static jlong CreatePorterDuffFilter(JNIEnv* env, jobject, jint srcColor, jint modeHandle) {
     40         SkXfermode::Mode mode = static_cast<SkXfermode::Mode>(modeHandle);
     41         return reinterpret_cast<jlong>(SkColorFilter::CreateModeFilter(srcColor, mode));
     42     }
     43 
     44     static jlong CreateLightingFilter(JNIEnv* env, jobject, jint mul, jint add) {
     45         return reinterpret_cast<jlong>(SkColorFilter::CreateLightingFilter(mul, add));
     46     }
     47 
     48     static jlong CreateColorMatrixFilter(JNIEnv* env, jobject, jfloatArray jarray) {
     49         AutoJavaFloatArray autoArray(env, jarray, 20);
     50         const float* src = autoArray.ptr();
     51 
     52 #ifdef SK_SCALAR_IS_FLOAT
     53         return reinterpret_cast<jlong>(SkColorMatrixFilter::Create(src));
     54 #else
     55         SkASSERT(false);
     56 #endif
     57     }
     58 };
     59 
     60 static JNINativeMethod colorfilter_methods[] = {
     61     {"destroyFilter", "(J)V", (void*) SkColorFilterGlue::finalizer}
     62 };
     63 
     64 static JNINativeMethod porterduff_methods[] = {
     65     { "native_CreatePorterDuffFilter", "(II)J", (void*) SkColorFilterGlue::CreatePorterDuffFilter   },
     66 };
     67 
     68 static JNINativeMethod lighting_methods[] = {
     69     { "native_CreateLightingFilter", "(II)J", (void*) SkColorFilterGlue::CreateLightingFilter   },
     70 };
     71 
     72 static JNINativeMethod colormatrix_methods[] = {
     73     { "nativeColorMatrixFilter", "([F)J", (void*) SkColorFilterGlue::CreateColorMatrixFilter   },
     74 };
     75 
     76 int register_android_graphics_ColorFilter(JNIEnv* env) {
     77     android::RegisterMethodsOrDie(env, "android/graphics/ColorFilter", colorfilter_methods,
     78                                   NELEM(colorfilter_methods));
     79     android::RegisterMethodsOrDie(env, "android/graphics/PorterDuffColorFilter", porterduff_methods,
     80                                   NELEM(porterduff_methods));
     81     android::RegisterMethodsOrDie(env, "android/graphics/LightingColorFilter", lighting_methods,
     82                                   NELEM(lighting_methods));
     83     android::RegisterMethodsOrDie(env, "android/graphics/ColorMatrixColorFilter",
     84                                   colormatrix_methods, NELEM(colormatrix_methods));
     85 
     86     return 0;
     87 }
     88 
     89 }
     90