ColorFilter.cpp revision db1938e0e6ef816e228c815adccebd5cb05f2aa8 
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
28namespace android {
29
30using namespace uirenderer;
31
32class SkColorFilterGlue {
33public:
34    static void finalizer(JNIEnv* env, jobject clazz, SkColorFilter* obj, SkiaColorFilter* f) {
35        delete f;
36        obj->safeUnref();
37    }
38
39    static SkColorFilter* CreatePorterDuffFilter(JNIEnv* env, jobject, jint srcColor,
40            SkPorterDuff::Mode mode) {
41        return SkColorFilter::CreateModeFilter(srcColor, SkPorterDuff::ToXfermodeMode(mode));
42    }
43
44    static SkiaColorFilter* glCreatePorterDuffFilter(JNIEnv* env, jobject, jint srcColor,
45            SkPorterDuff::Mode mode) {
46        return new SkiaBlendFilter(srcColor, SkPorterDuff::ToXfermodeMode(mode));
47    }
48
49    static SkColorFilter* CreateLightingFilter(JNIEnv* env, jobject, jint mul, jint add) {
50        return SkColorFilter::CreateLightingFilter(mul, add);
51    }
52
53    static SkiaColorFilter* glCreateLightingFilter(JNIEnv* env, jobject, jint mul, jint add) {
54        return new SkiaLightingFilter(mul, add);
55    }
56
57    static SkColorFilter* CreateColorMatrixFilter(JNIEnv* env, jobject, jfloatArray jarray) {
58        AutoJavaFloatArray autoArray(env, jarray, 20);
59        const float* src = autoArray.ptr();
60
61#ifdef SK_SCALAR_IS_FIXED
62        SkFixed array[20];
63        for (int i = 0; i < 20; i++) {
64            array[i] = SkFloatToScalar(src[i]);
65        }
66        return new SkColorMatrixFilter(array);
67#else
68        return new SkColorMatrixFilter(src);
69#endif
70    }
71
72    static SkiaColorFilter* glCreateColorMatrixFilter(JNIEnv* env, jobject, jfloatArray jarray) {
73        AutoJavaFloatArray autoArray(env, jarray, 20);
74        const float* src = autoArray.ptr();
75
76        float* colorMatrix = new float[16];
77        memcpy(colorMatrix, src, 4 * sizeof(float));
78        memcpy(&colorMatrix[4], &src[5], 4 * sizeof(float));
79        memcpy(&colorMatrix[8], &src[10], 4 * sizeof(float));
80        memcpy(&colorMatrix[12], &src[15], 4 * sizeof(float));
81
82        float* colorVector = new float[4];
83        colorVector[0] = src[4];
84        colorVector[1] = src[9];
85        colorVector[2] = src[14];
86        colorVector[3] = src[19];
87
88        return new SkiaColorMatrixFilter(colorMatrix, colorVector);
89    }
90};
91
92static JNINativeMethod colorfilter_methods[] = {
93    {"finalizer", "(II)V", (void*) SkColorFilterGlue::finalizer}
94};
95
96static JNINativeMethod porterduff_methods[] = {
97    { "native_CreatePorterDuffFilter", "(II)I", (void*) SkColorFilterGlue::CreatePorterDuffFilter   },
98    { "nCreatePorterDuffFilter",       "(II)I", (void*) SkColorFilterGlue::glCreatePorterDuffFilter }
99};
100
101static JNINativeMethod lighting_methods[] = {
102    { "native_CreateLightingFilter", "(II)I", (void*) SkColorFilterGlue::CreateLightingFilter   },
103    { "nCreateLightingFilter",       "(II)I", (void*) SkColorFilterGlue::glCreateLightingFilter },
104};
105
106static JNINativeMethod colormatrix_methods[] = {
107    { "nativeColorMatrixFilter", "([F)I", (void*) SkColorFilterGlue::CreateColorMatrixFilter   },
108    { "nColorMatrixFilter",      "([F)I", (void*) SkColorFilterGlue::glCreateColorMatrixFilter }
109};
110
111#define REG(env, name, array) \
112    result = android::AndroidRuntime::registerNativeMethods(env, name, array, \
113                                                    SK_ARRAY_COUNT(array));  \
114    if (result < 0) return result
115
116int register_android_graphics_ColorFilter(JNIEnv* env) {
117    int result;
118
119    REG(env, "android/graphics/ColorFilter", colorfilter_methods);
120    REG(env, "android/graphics/PorterDuffColorFilter", porterduff_methods);
121    REG(env, "android/graphics/LightingColorFilter", lighting_methods);
122    REG(env, "android/graphics/ColorMatrixColorFilter", colormatrix_methods);
123
124    return 0;
125}
126
127}
128