ColorFilter.cpp revision a0398430fcf365fba6e42ad0bdca2fbf45ed6fe0 
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 <android_runtime/AndroidRuntime.h>
21
22#include "SkColorFilter.h"
23#include "SkColorMatrixFilter.h"
24#include "SkPorterDuff.h"
25
26#include <SkiaColorFilter.h>
27#include <Caches.h>
28
29namespace android {
30
31using namespace uirenderer;
32
33class SkColorFilterGlue {
34public:
35    static void finalizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong fHandle) {
36        SkColorFilter* obj = reinterpret_cast<SkColorFilter *>(objHandle);
37        SkiaColorFilter* f = reinterpret_cast<SkiaColorFilter *>(fHandle);
38        SkSafeUnref(obj);
39        // f == NULL when not !USE_OPENGL_RENDERER, so no need to delete outside the ifdef
40#ifdef USE_OPENGL_RENDERER
41        if (android::uirenderer::Caches::hasInstance()) {
42            android::uirenderer::Caches::getInstance().resourceCache.destructor(f);
43        } else {
44            delete f;
45        }
46#endif
47    }
48
49    static jlong glCreatePorterDuffFilter(JNIEnv* env, jobject, jlong skFilterHandle,
50            jint srcColor, jint modeHandle) {
51        SkColorFilter *skFilter = reinterpret_cast<SkColorFilter *>(skFilterHandle);
52        SkPorterDuff::Mode mode = static_cast<SkPorterDuff::Mode>(modeHandle);
53#ifdef USE_OPENGL_RENDERER
54        return reinterpret_cast<jlong>(new SkiaBlendFilter(skFilter, srcColor, SkPorterDuff::ToXfermodeMode(mode)));
55#else
56        return NULL;
57#endif
58    }
59
60    static jlong glCreateLightingFilter(JNIEnv* env, jobject, jlong skFilterHandle,
61            jint mul, jint add) {
62        SkColorFilter *skFilter = reinterpret_cast<SkColorFilter *>(skFilterHandle);
63#ifdef USE_OPENGL_RENDERER
64        return reinterpret_cast<jlong>(new SkiaLightingFilter(skFilter, mul, add));
65#else
66        return NULL;
67#endif
68    }
69
70    static jlong glCreateColorMatrixFilter(JNIEnv* env, jobject, jlong skFilterHandle,
71            jfloatArray jarray) {
72        SkColorFilter *skFilter = reinterpret_cast<SkColorFilter *>(skFilterHandle);
73#ifdef USE_OPENGL_RENDERER
74        AutoJavaFloatArray autoArray(env, jarray, 20);
75        const float* src = autoArray.ptr();
76
77        float* colorMatrix = new float[16];
78        memcpy(colorMatrix, src, 4 * sizeof(float));
79        memcpy(&colorMatrix[4], &src[5], 4 * sizeof(float));
80        memcpy(&colorMatrix[8], &src[10], 4 * sizeof(float));
81        memcpy(&colorMatrix[12], &src[15], 4 * sizeof(float));
82
83        float* colorVector = new float[4];
84        colorVector[0] = src[4];
85        colorVector[1] = src[9];
86        colorVector[2] = src[14];
87        colorVector[3] = src[19];
88
89        return reinterpret_cast<jlong>(new SkiaColorMatrixFilter(skFilter, colorMatrix, colorVector));
90#else
91        return NULL;
92#endif
93    }
94
95    static jlong CreatePorterDuffFilter(JNIEnv* env, jobject, jint srcColor,
96            jint modeHandle) {
97        SkPorterDuff::Mode mode = (SkPorterDuff::Mode) modeHandle;
98        return reinterpret_cast<jlong>(SkColorFilter::CreateModeFilter(srcColor, SkPorterDuff::ToXfermodeMode(mode)));
99    }
100
101    static jlong CreateLightingFilter(JNIEnv* env, jobject, jint mul, jint add) {
102        return reinterpret_cast<jlong>(SkColorFilter::CreateLightingFilter(mul, add));
103    }
104
105    static jlong CreateColorMatrixFilter(JNIEnv* env, jobject, jfloatArray jarray) {
106        AutoJavaFloatArray autoArray(env, jarray, 20);
107        const float* src = autoArray.ptr();
108
109#ifdef SK_SCALAR_IS_FIXED
110        SkFixed array[20];
111        for (int i = 0; i < 20; i++) {
112            array[i] = SkFloatToScalar(src[i]);
113        }
114        return reinterpret_cast<jlong>(new SkColorMatrixFilter(array));
115#else
116        return reinterpret_cast<jlong>(new SkColorMatrixFilter(src));
117#endif
118    }
119};
120
121static JNINativeMethod colorfilter_methods[] = {
122    {"finalizer", "(JJ)V", (void*) SkColorFilterGlue::finalizer}
123};
124
125static JNINativeMethod porterduff_methods[] = {
126    { "native_CreatePorterDuffFilter", "(II)J", (void*) SkColorFilterGlue::CreatePorterDuffFilter   },
127    { "nCreatePorterDuffFilter",       "(JII)J", (void*) SkColorFilterGlue::glCreatePorterDuffFilter }
128};
129
130static JNINativeMethod lighting_methods[] = {
131    { "native_CreateLightingFilter", "(II)J", (void*) SkColorFilterGlue::CreateLightingFilter   },
132    { "nCreateLightingFilter",       "(JII)J", (void*) SkColorFilterGlue::glCreateLightingFilter },
133};
134
135static JNINativeMethod colormatrix_methods[] = {
136    { "nativeColorMatrixFilter", "([F)J", (void*) SkColorFilterGlue::CreateColorMatrixFilter   },
137    { "nColorMatrixFilter",      "(J[F)J", (void*) SkColorFilterGlue::glCreateColorMatrixFilter }
138};
139
140#define REG(env, name, array) \
141    result = android::AndroidRuntime::registerNativeMethods(env, name, array, \
142                                                    SK_ARRAY_COUNT(array));  \
143    if (result < 0) return result
144
145int register_android_graphics_ColorFilter(JNIEnv* env) {
146    int result;
147
148    REG(env, "android/graphics/ColorFilter", colorfilter_methods);
149    REG(env, "android/graphics/PorterDuffColorFilter", porterduff_methods);
150    REG(env, "android/graphics/LightingColorFilter", lighting_methods);
151    REG(env, "android/graphics/ColorMatrixColorFilter", colormatrix_methods);
152
153    return 0;
154}
155
156}
157