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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:
finalizer(JNIEnv * env,jobject clazz,jlong skFilterHandle)34     static void finalizer(JNIEnv* env, jobject clazz, jlong skFilterHandle) {
35         SkColorFilter* filter = reinterpret_cast<SkColorFilter *>(skFilterHandle);
36         if (filter) SkSafeUnref(filter);
37     }
38 
CreatePorterDuffFilter(JNIEnv * env,jobject,jint srcColor,jint modeHandle)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 
CreateLightingFilter(JNIEnv * env,jobject,jint mul,jint add)44     static jlong CreateLightingFilter(JNIEnv* env, jobject, jint mul, jint add) {
45         return reinterpret_cast<jlong>(SkColorMatrixFilter::CreateLightingFilter(mul, add));
46     }
47 
CreateColorMatrixFilter(JNIEnv * env,jobject,jfloatArray jarray)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 const JNINativeMethod colorfilter_methods[] = {
61     {"destroyFilter", "(J)V", (void*) SkColorFilterGlue::finalizer}
62 };
63 
64 static const JNINativeMethod porterduff_methods[] = {
65     { "native_CreatePorterDuffFilter", "(II)J", (void*) SkColorFilterGlue::CreatePorterDuffFilter   },
66 };
67 
68 static const JNINativeMethod lighting_methods[] = {
69     { "native_CreateLightingFilter", "(II)J", (void*) SkColorFilterGlue::CreateLightingFilter   },
70 };
71 
72 static const JNINativeMethod colormatrix_methods[] = {
73     { "nativeColorMatrixFilter", "([F)J", (void*) SkColorFilterGlue::CreateColorMatrixFilter   },
74 };
75 
register_android_graphics_ColorFilter(JNIEnv * env)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