ColorFilter.cpp revision 163935113919a184122b8b3bd672ef08c8df65dc 
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 SkiaColorFilter* glCreatePorterDuffFilter(JNIEnv* env, jobject, jint srcColor,
40            SkPorterDuff::Mode mode) {
41#ifdef USE_OPENGL_RENDERER
42        return new SkiaBlendFilter(srcColor, SkPorterDuff::ToXfermodeMode(mode));
43#else
44        return NULL;
45#endif
46    }
47
48    static SkiaColorFilter* glCreateLightingFilter(JNIEnv* env, jobject, jint mul, jint add) {
49#ifdef USE_OPENGL_RENDERER
50        return new SkiaLightingFilter(mul, add);
51#else
52        return NULL;
53#endif
54    }
55
56    static SkiaColorFilter* glCreateColorMatrixFilter(JNIEnv* env, jobject, jfloatArray jarray) {
57#ifdef USE_OPENGL_RENDERER
58        AutoJavaFloatArray autoArray(env, jarray, 20);
59        const float* src = autoArray.ptr();
60
61        float* colorMatrix = new float[16];
62        memcpy(colorMatrix, src, 4 * sizeof(float));
63        memcpy(&colorMatrix[4], &src[5], 4 * sizeof(float));
64        memcpy(&colorMatrix[8], &src[10], 4 * sizeof(float));
65        memcpy(&colorMatrix[12], &src[15], 4 * sizeof(float));
66
67        float* colorVector = new float[4];
68        colorVector[0] = src[4];
69        colorVector[1] = src[9];
70        colorVector[2] = src[14];
71        colorVector[3] = src[19];
72
73        return new SkiaColorMatrixFilter(colorMatrix, colorVector);
74#else
75        return NULL;
76#endif
77    }
78
79    static SkColorFilter* CreatePorterDuffFilter(JNIEnv* env, jobject, jint srcColor,
80            SkPorterDuff::Mode mode) {
81        return SkColorFilter::CreateModeFilter(srcColor, SkPorterDuff::ToXfermodeMode(mode));
82    }
83
84    static SkColorFilter* CreateLightingFilter(JNIEnv* env, jobject, jint mul, jint add) {
85        return SkColorFilter::CreateLightingFilter(mul, add);
86    }
87
88    static SkColorFilter* CreateColorMatrixFilter(JNIEnv* env, jobject, jfloatArray jarray) {
89        AutoJavaFloatArray autoArray(env, jarray, 20);
90        const float* src = autoArray.ptr();
91
92#ifdef SK_SCALAR_IS_FIXED
93        SkFixed array[20];
94        for (int i = 0; i < 20; i++) {
95            array[i] = SkFloatToScalar(src[i]);
96        }
97        return new SkColorMatrixFilter(array);
98#else
99        return new SkColorMatrixFilter(src);
100#endif
101    }
102};
103
104static JNINativeMethod colorfilter_methods[] = {
105    {"finalizer", "(II)V", (void*) SkColorFilterGlue::finalizer}
106};
107
108static JNINativeMethod porterduff_methods[] = {
109    { "native_CreatePorterDuffFilter", "(II)I", (void*) SkColorFilterGlue::CreatePorterDuffFilter   },
110    { "nCreatePorterDuffFilter",       "(II)I", (void*) SkColorFilterGlue::glCreatePorterDuffFilter }
111};
112
113static JNINativeMethod lighting_methods[] = {
114    { "native_CreateLightingFilter", "(II)I", (void*) SkColorFilterGlue::CreateLightingFilter   },
115    { "nCreateLightingFilter",       "(II)I", (void*) SkColorFilterGlue::glCreateLightingFilter },
116};
117
118static JNINativeMethod colormatrix_methods[] = {
119    { "nativeColorMatrixFilter", "([F)I", (void*) SkColorFilterGlue::CreateColorMatrixFilter   },
120    { "nColorMatrixFilter",      "([F)I", (void*) SkColorFilterGlue::glCreateColorMatrixFilter }
121};
122
123#define REG(env, name, array) \
124    result = android::AndroidRuntime::registerNativeMethods(env, name, array, \
125                                                    SK_ARRAY_COUNT(array));  \
126    if (result < 0) return result
127
128int register_android_graphics_ColorFilter(JNIEnv* env) {
129    int result;
130
131    REG(env, "android/graphics/ColorFilter", colorfilter_methods);
132    REG(env, "android/graphics/PorterDuffColorFilter", porterduff_methods);
133    REG(env, "android/graphics/LightingColorFilter", lighting_methods);
134    REG(env, "android/graphics/ColorMatrixColorFilter", colormatrix_methods);
135
136    return 0;
137}
138
139}
140