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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 
     25 #include <Caches.h>
     26 
     27 namespace android {
     28 
     29 using namespace uirenderer;
     30 
     31 class SkColorFilterGlue {
     32 public:
     33     static void SafeUnref(SkColorFilter* filter) {
     34         SkSafeUnref(filter);
     35     }
     36 
     37     static jlong GetNativeFinalizer(JNIEnv*, jobject) {
     38         return static_cast<jlong>(reinterpret_cast<uintptr_t>(&SafeUnref));
     39     }
     40 
     41     static jlong CreatePorterDuffFilter(JNIEnv* env, jobject, jint srcColor, jint modeHandle) {
     42         SkBlendMode mode = static_cast<SkBlendMode>(modeHandle);
     43         return reinterpret_cast<jlong>(SkColorFilter::MakeModeFilter(srcColor, mode).release());
     44     }
     45 
     46     static jlong CreateLightingFilter(JNIEnv* env, jobject, jint mul, jint add) {
     47         return reinterpret_cast<jlong>(SkColorMatrixFilter::MakeLightingFilter(mul, add).release());
     48     }
     49 
     50     static jlong CreateColorMatrixFilter(JNIEnv* env, jobject, jfloatArray jarray) {
     51         AutoJavaFloatArray autoArray(env, jarray, 20);
     52         const float* src = autoArray.ptr();
     53 
     54 #ifdef SK_SCALAR_IS_FLOAT
     55         return reinterpret_cast<jlong>(SkColorFilter::MakeMatrixFilterRowMajor255(src).release());
     56 #else
     57         SkASSERT(false);
     58 #endif
     59     }
     60 };
     61 
     62 static const JNINativeMethod colorfilter_methods[] = {
     63     {"nativeGetFinalizer", "()J", (void*) SkColorFilterGlue::GetNativeFinalizer }
     64 };
     65 
     66 static const JNINativeMethod porterduff_methods[] = {
     67     { "native_CreatePorterDuffFilter", "(II)J", (void*) SkColorFilterGlue::CreatePorterDuffFilter },
     68 };
     69 
     70 static const JNINativeMethod lighting_methods[] = {
     71     { "native_CreateLightingFilter", "(II)J", (void*) SkColorFilterGlue::CreateLightingFilter },
     72 };
     73 
     74 static const JNINativeMethod colormatrix_methods[] = {
     75     { "nativeColorMatrixFilter", "([F)J", (void*) SkColorFilterGlue::CreateColorMatrixFilter },
     76 };
     77 
     78 int register_android_graphics_ColorFilter(JNIEnv* env) {
     79     android::RegisterMethodsOrDie(env, "android/graphics/ColorFilter", colorfilter_methods,
     80                                   NELEM(colorfilter_methods));
     81     android::RegisterMethodsOrDie(env, "android/graphics/PorterDuffColorFilter", porterduff_methods,
     82                                   NELEM(porterduff_methods));
     83     android::RegisterMethodsOrDie(env, "android/graphics/LightingColorFilter", lighting_methods,
     84                                   NELEM(lighting_methods));
     85     android::RegisterMethodsOrDie(env, "android/graphics/ColorMatrixColorFilter",
     86                                   colormatrix_methods, NELEM(colormatrix_methods));
     87 
     88     return 0;
     89 }
     90 
     91 }
     92