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 // This file was generated from the C++ include file: SkColorFilter.h
19 // Any changes made to this file will be discarded by the build.
20 // To change this file, either edit the include, or device/tools/gluemaker/main.cpp,
21 // or one of the auxilary file specifications in device/tools/gluemaker.
22
23 #include "jni.h"
24 #include "GraphicsJNI.h"
25 #include <android_runtime/AndroidRuntime.h>
26
27 #include "core_jni_helpers.h"
28
29 #include "SkDrawFilter.h"
30 #include "SkPaintFlagsDrawFilter.h"
31 #include "SkPaint.h"
32
33 namespace android {
34
35 // Custom version of SkPaintFlagsDrawFilter that also calls setFilterQuality.
36 class CompatFlagsDrawFilter : public SkPaintFlagsDrawFilter {
37 public:
CompatFlagsDrawFilter(uint32_t clearFlags,uint32_t setFlags,SkFilterQuality desiredQuality)38 CompatFlagsDrawFilter(uint32_t clearFlags, uint32_t setFlags,
39 SkFilterQuality desiredQuality)
40 : SkPaintFlagsDrawFilter(clearFlags, setFlags)
41 , fDesiredQuality(desiredQuality) {
42 }
43
filter(SkPaint * paint,Type type)44 virtual bool filter(SkPaint* paint, Type type) {
45 SkPaintFlagsDrawFilter::filter(paint, type);
46 paint->setFilterQuality(fDesiredQuality);
47 return true;
48 }
49
50 private:
51 const SkFilterQuality fDesiredQuality;
52 };
53
54 // Returns whether flags contains FILTER_BITMAP_FLAG. If flags does, remove it.
hadFiltering(jint & flags)55 static inline bool hadFiltering(jint& flags) {
56 // Equivalent to the Java Paint's FILTER_BITMAP_FLAG.
57 static const uint32_t sFilterBitmapFlag = 0x02;
58
59 const bool result = (flags & sFilterBitmapFlag) != 0;
60 flags &= ~sFilterBitmapFlag;
61 return result;
62 }
63
64 class SkDrawFilterGlue {
65 public:
66
finalizer(JNIEnv * env,jobject clazz,jlong objHandle)67 static void finalizer(JNIEnv* env, jobject clazz, jlong objHandle) {
68 SkDrawFilter* obj = reinterpret_cast<SkDrawFilter*>(objHandle);
69 SkSafeUnref(obj);
70 }
71
CreatePaintFlagsDF(JNIEnv * env,jobject clazz,jint clearFlags,jint setFlags)72 static jlong CreatePaintFlagsDF(JNIEnv* env, jobject clazz,
73 jint clearFlags, jint setFlags) {
74 if (clearFlags | setFlags) {
75 // Mask both groups of flags to remove FILTER_BITMAP_FLAG, which no
76 // longer has a Skia equivalent flag (instead it corresponds to
77 // calling setFilterQuality), and keep track of which group(s), if
78 // any, had the flag set.
79 const bool turnFilteringOn = hadFiltering(setFlags);
80 const bool turnFilteringOff = hadFiltering(clearFlags);
81
82 SkDrawFilter* filter;
83 if (turnFilteringOn) {
84 // Turning filtering on overrides turning it off.
85 filter = new CompatFlagsDrawFilter(clearFlags, setFlags,
86 kLow_SkFilterQuality);
87 } else if (turnFilteringOff) {
88 filter = new CompatFlagsDrawFilter(clearFlags, setFlags,
89 kNone_SkFilterQuality);
90 } else {
91 filter = new SkPaintFlagsDrawFilter(clearFlags, setFlags);
92 }
93 return reinterpret_cast<jlong>(filter);
94 } else {
95 return NULL;
96 }
97 }
98 };
99
100 static const JNINativeMethod drawfilter_methods[] = {
101 {"nativeDestructor", "(J)V", (void*) SkDrawFilterGlue::finalizer}
102 };
103
104 static const JNINativeMethod paintflags_methods[] = {
105 {"nativeConstructor","(II)J", (void*) SkDrawFilterGlue::CreatePaintFlagsDF}
106 };
107
register_android_graphics_DrawFilter(JNIEnv * env)108 int register_android_graphics_DrawFilter(JNIEnv* env) {
109 int result = RegisterMethodsOrDie(env, "android/graphics/DrawFilter", drawfilter_methods,
110 NELEM(drawfilter_methods));
111 result |= RegisterMethodsOrDie(env, "android/graphics/PaintFlagsDrawFilter", paintflags_methods,
112 NELEM(paintflags_methods));
113
114 return 0;
115 }
116
117 }
118