Matrix.cpp revision 27f0b17d853d8bef918c3d869044e50cf3904ee3 
1/* libs/android_runtime/android/graphics/Matrix.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 "SkMatrix.h"
23#include "SkTemplates.h"
24
25#include "Matrix.h"
26
27#include <Caches.h>
28
29namespace android {
30
31class SkMatrixGlue {
32public:
33
34    static void finalizer(JNIEnv* env, jobject clazz, SkMatrix* obj) {
35#ifdef USE_OPENGL_RENDERER
36        if (android::uirenderer::Caches::hasInstance()) {
37            android::uirenderer::Caches::getInstance().resourceCache.destructor(obj);
38            return;
39        }
40#endif // USE_OPENGL_RENDERER
41        delete obj;
42    }
43
44    static SkMatrix* create(JNIEnv* env, jobject clazz, const SkMatrix* src) {
45        SkMatrix* obj = new SkMatrix();
46        if (src)
47            *obj = *src;
48        else
49            obj->reset();
50        return obj;
51    }
52
53    static jboolean isIdentity(JNIEnv* env, jobject clazz, SkMatrix* obj) {
54        return obj->isIdentity();
55    }
56
57    static jboolean rectStaysRect(JNIEnv* env, jobject clazz, SkMatrix* obj) {
58        return obj->rectStaysRect();
59    }
60
61    static void reset(JNIEnv* env, jobject clazz, SkMatrix* obj) {
62        obj->reset();
63    }
64
65    static void set(JNIEnv* env, jobject clazz, SkMatrix* obj, SkMatrix* other) {
66        *obj = *other;
67    }
68
69    static void setTranslate(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat dx, jfloat dy) {
70        SkScalar dx_ = SkFloatToScalar(dx);
71        SkScalar dy_ = SkFloatToScalar(dy);
72        obj->setTranslate(dx_, dy_);
73    }
74
75    static void setScale__FFFF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat sx, jfloat sy, jfloat px, jfloat py) {
76        SkScalar sx_ = SkFloatToScalar(sx);
77        SkScalar sy_ = SkFloatToScalar(sy);
78        SkScalar px_ = SkFloatToScalar(px);
79        SkScalar py_ = SkFloatToScalar(py);
80        obj->setScale(sx_, sy_, px_, py_);
81    }
82
83    static void setScale__FF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat sx, jfloat sy) {
84        SkScalar sx_ = SkFloatToScalar(sx);
85        SkScalar sy_ = SkFloatToScalar(sy);
86        obj->setScale(sx_, sy_);
87    }
88
89    static void setRotate__FFF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat degrees, jfloat px, jfloat py) {
90        SkScalar degrees_ = SkFloatToScalar(degrees);
91        SkScalar px_ = SkFloatToScalar(px);
92        SkScalar py_ = SkFloatToScalar(py);
93        obj->setRotate(degrees_, px_, py_);
94    }
95
96    static void setRotate__F(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat degrees) {
97        SkScalar degrees_ = SkFloatToScalar(degrees);
98        obj->setRotate(degrees_);
99    }
100
101    static void setSinCos__FFFF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat sinValue, jfloat cosValue, jfloat px, jfloat py) {
102        SkScalar sinValue_ = SkFloatToScalar(sinValue);
103        SkScalar cosValue_ = SkFloatToScalar(cosValue);
104        SkScalar px_ = SkFloatToScalar(px);
105        SkScalar py_ = SkFloatToScalar(py);
106        obj->setSinCos(sinValue_, cosValue_, px_, py_);
107    }
108
109    static void setSinCos__FF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat sinValue, jfloat cosValue) {
110        SkScalar sinValue_ = SkFloatToScalar(sinValue);
111        SkScalar cosValue_ = SkFloatToScalar(cosValue);
112        obj->setSinCos(sinValue_, cosValue_);
113    }
114
115    static void setSkew__FFFF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat kx, jfloat ky, jfloat px, jfloat py) {
116        SkScalar kx_ = SkFloatToScalar(kx);
117        SkScalar ky_ = SkFloatToScalar(ky);
118        SkScalar px_ = SkFloatToScalar(px);
119        SkScalar py_ = SkFloatToScalar(py);
120        obj->setSkew(kx_, ky_, px_, py_);
121    }
122
123    static void setSkew__FF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat kx, jfloat ky) {
124        SkScalar kx_ = SkFloatToScalar(kx);
125        SkScalar ky_ = SkFloatToScalar(ky);
126        obj->setSkew(kx_, ky_);
127    }
128
129    static jboolean setConcat(JNIEnv* env, jobject clazz, SkMatrix* obj, SkMatrix* a, SkMatrix* b) {
130        return obj->setConcat(*a, *b);
131    }
132
133    static jboolean preTranslate(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat dx, jfloat dy) {
134        SkScalar dx_ = SkFloatToScalar(dx);
135        SkScalar dy_ = SkFloatToScalar(dy);
136        return obj->preTranslate(dx_, dy_);
137    }
138
139    static jboolean preScale__FFFF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat sx, jfloat sy, jfloat px, jfloat py) {
140        SkScalar sx_ = SkFloatToScalar(sx);
141        SkScalar sy_ = SkFloatToScalar(sy);
142        SkScalar px_ = SkFloatToScalar(px);
143        SkScalar py_ = SkFloatToScalar(py);
144        return obj->preScale(sx_, sy_, px_, py_);
145    }
146
147    static jboolean preScale__FF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat sx, jfloat sy) {
148        SkScalar sx_ = SkFloatToScalar(sx);
149        SkScalar sy_ = SkFloatToScalar(sy);
150        return obj->preScale(sx_, sy_);
151    }
152
153    static jboolean preRotate__FFF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat degrees, jfloat px, jfloat py) {
154        SkScalar degrees_ = SkFloatToScalar(degrees);
155        SkScalar px_ = SkFloatToScalar(px);
156        SkScalar py_ = SkFloatToScalar(py);
157        return obj->preRotate(degrees_, px_, py_);
158    }
159
160    static jboolean preRotate__F(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat degrees) {
161        SkScalar degrees_ = SkFloatToScalar(degrees);
162        return obj->preRotate(degrees_);
163    }
164
165    static jboolean preSkew__FFFF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat kx, jfloat ky, jfloat px, jfloat py) {
166        SkScalar kx_ = SkFloatToScalar(kx);
167        SkScalar ky_ = SkFloatToScalar(ky);
168        SkScalar px_ = SkFloatToScalar(px);
169        SkScalar py_ = SkFloatToScalar(py);
170        return obj->preSkew(kx_, ky_, px_, py_);
171    }
172
173    static jboolean preSkew__FF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat kx, jfloat ky) {
174        SkScalar kx_ = SkFloatToScalar(kx);
175        SkScalar ky_ = SkFloatToScalar(ky);
176        return obj->preSkew(kx_, ky_);
177    }
178
179    static jboolean preConcat(JNIEnv* env, jobject clazz, SkMatrix* obj, SkMatrix* other) {
180        return obj->preConcat(*other);
181    }
182
183    static jboolean postTranslate(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat dx, jfloat dy) {
184        SkScalar dx_ = SkFloatToScalar(dx);
185        SkScalar dy_ = SkFloatToScalar(dy);
186        return obj->postTranslate(dx_, dy_);
187    }
188
189    static jboolean postScale__FFFF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat sx, jfloat sy, jfloat px, jfloat py) {
190        SkScalar sx_ = SkFloatToScalar(sx);
191        SkScalar sy_ = SkFloatToScalar(sy);
192        SkScalar px_ = SkFloatToScalar(px);
193        SkScalar py_ = SkFloatToScalar(py);
194        return obj->postScale(sx_, sy_, px_, py_);
195    }
196
197    static jboolean postScale__FF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat sx, jfloat sy) {
198        SkScalar sx_ = SkFloatToScalar(sx);
199        SkScalar sy_ = SkFloatToScalar(sy);
200        return obj->postScale(sx_, sy_);
201    }
202
203    static jboolean postRotate__FFF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat degrees, jfloat px, jfloat py) {
204        SkScalar degrees_ = SkFloatToScalar(degrees);
205        SkScalar px_ = SkFloatToScalar(px);
206        SkScalar py_ = SkFloatToScalar(py);
207        return obj->postRotate(degrees_, px_, py_);
208    }
209
210    static jboolean postRotate__F(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat degrees) {
211        SkScalar degrees_ = SkFloatToScalar(degrees);
212        return obj->postRotate(degrees_);
213    }
214
215    static jboolean postSkew__FFFF(JNIEnv* env, jobject clazz, SkMatrix* obj, jfloat kx, jfloat ky, jfloat px, jfloat py) {
216        SkScalar kx_ = SkFloatToScalar(kx);
217        SkScalar ky_ = SkFloatToScalar(ky);
218        SkScalar px_ = SkFloatToScalar(px);
219        SkScalar py_ = SkFloatToScalar(py);
220        return obj->postSkew(kx_, ky_, px_, py_);
221    }
222
223    static jboolean postSkew__FF(JNIEnv* env, jobject clazz, SkMatrix* matrix, jfloat kx, jfloat ky) {
224        SkScalar kx_ = SkFloatToScalar(kx);
225        SkScalar ky_ = SkFloatToScalar(ky);
226        return matrix->postSkew(kx_, ky_);
227    }
228
229    static jboolean postConcat(JNIEnv* env, jobject clazz, SkMatrix* matrix, SkMatrix* other) {
230        return matrix->postConcat(*other);
231    }
232
233    static jboolean setRectToRect(JNIEnv* env, jobject clazz, SkMatrix* matrix, jobject src, jobject dst, SkMatrix::ScaleToFit stf) {
234        SkRect src_;
235        GraphicsJNI::jrectf_to_rect(env, src, &src_);
236        SkRect dst_;
237        GraphicsJNI::jrectf_to_rect(env, dst, &dst_);
238        return matrix->setRectToRect(src_, dst_, stf);
239    }
240
241    static jboolean setPolyToPoly(JNIEnv* env, jobject clazz, SkMatrix* matrix,
242                                  jfloatArray jsrc, int srcIndex,
243                                  jfloatArray jdst, int dstIndex, int ptCount) {
244        SkASSERT(srcIndex >= 0);
245        SkASSERT(dstIndex >= 0);
246        SkASSERT((unsigned)ptCount <= 4);
247
248        AutoJavaFloatArray autoSrc(env, jsrc, srcIndex + (ptCount << 1));
249        AutoJavaFloatArray autoDst(env, jdst, dstIndex + (ptCount << 1));
250        float* src = autoSrc.ptr() + srcIndex;
251        float* dst = autoDst.ptr() + dstIndex;
252
253#ifdef SK_SCALAR_IS_FIXED
254        SkPoint srcPt[4], dstPt[4];
255        for (int i = 0; i < ptCount; i++) {
256            int x = i << 1;
257            int y = x + 1;
258            srcPt[i].set(SkFloatToScalar(src[x]), SkFloatToScalar(src[y]));
259            dstPt[i].set(SkFloatToScalar(dst[x]), SkFloatToScalar(dst[y]));
260        }
261        return matrix->setPolyToPoly(srcPt, dstPt, ptCount);
262#else
263        return matrix->setPolyToPoly((const SkPoint*)src, (const SkPoint*)dst,
264                                     ptCount);
265#endif
266    }
267
268    static jboolean invert(JNIEnv* env, jobject clazz, SkMatrix* matrix, SkMatrix* inverse) {
269        return matrix->invert(inverse);
270    }
271
272    static void mapPoints(JNIEnv* env, jobject clazz, SkMatrix* matrix,
273                              jfloatArray dst, int dstIndex,
274                              jfloatArray src, int srcIndex,
275                              int ptCount, bool isPts) {
276        SkASSERT(ptCount >= 0);
277        AutoJavaFloatArray autoSrc(env, src, srcIndex + (ptCount << 1));
278        AutoJavaFloatArray autoDst(env, dst, dstIndex + (ptCount << 1));
279        float* srcArray = autoSrc.ptr() + srcIndex;
280        float* dstArray = autoDst.ptr() + dstIndex;
281
282#ifdef SK_SCALAR_IS_FIXED
283        // we allocate twice the count, 1 set for src, 1 for dst
284        SkAutoSTMalloc<32, SkPoint> storage(ptCount * 2);
285        SkPoint* pts = storage.get();
286        SkPoint* srcPt = pts;
287        SkPoint* dstPt = pts + ptCount;
288
289        int i;
290        for (i = 0; i < ptCount; i++) {
291            srcPt[i].set(SkFloatToScalar(srcArray[i << 1]),
292                         SkFloatToScalar(srcArray[(i << 1) + 1]));
293        }
294
295        if (isPts)
296            matrix->mapPoints(dstPt, srcPt, ptCount);
297        else
298            matrix->mapVectors(dstPt, srcPt, ptCount);
299
300        for (i = 0; i < ptCount; i++) {
301            dstArray[i << 1]  = SkScalarToFloat(dstPt[i].fX);
302            dstArray[(i << 1) + 1]  = SkScalarToFloat(dstPt[i].fY);
303        }
304#else
305        if (isPts)
306            matrix->mapPoints((SkPoint*)dstArray, (const SkPoint*)srcArray,
307                              ptCount);
308        else
309            matrix->mapVectors((SkVector*)dstArray, (const SkVector*)srcArray,
310                               ptCount);
311#endif
312    }
313
314    static jboolean mapRect__RectFRectF(JNIEnv* env, jobject clazz, SkMatrix* matrix, jobjectArray dst, jobject src) {
315        SkRect dst_, src_;
316        GraphicsJNI::jrectf_to_rect(env, src, &src_);
317        jboolean rectStaysRect = matrix->mapRect(&dst_, src_);
318        GraphicsJNI::rect_to_jrectf(dst_, env, dst);
319        return rectStaysRect;
320    }
321
322    static jfloat mapRadius(JNIEnv* env, jobject clazz, SkMatrix* matrix, jfloat radius) {
323        return SkScalarToFloat(matrix->mapRadius(SkFloatToScalar(radius)));
324    }
325
326    static void getValues(JNIEnv* env, jobject clazz, SkMatrix* matrix, jfloatArray values) {
327        AutoJavaFloatArray autoValues(env, values, 9);
328        float* dst = autoValues.ptr();
329
330#ifdef SK_SCALAR_IS_FIXED
331        for (int i = 0; i < 6; i++) {
332            dst[i] = SkFixedToFloat(matrix->get(i));
333        }
334        for (int j = 6; j < 9; j++) {
335            dst[j] = SkFractToFloat(matrix->get(j));
336        }
337#else
338        for (int i = 0; i < 9; i++) {
339            dst[i] = matrix->get(i);
340        }
341#endif
342    }
343
344    static void setValues(JNIEnv* env, jobject clazz, SkMatrix* matrix, jfloatArray values) {
345        AutoJavaFloatArray autoValues(env, values, 9);
346        const float* src = autoValues.ptr();
347
348#ifdef SK_SCALAR_IS_FIXED
349        for (int i = 0; i < 6; i++) {
350            matrix->set(i, SkFloatToFixed(src[i]));
351        }
352        for (int j = 6; j < 9; j++) {
353            matrix->set(j, SkFloatToFract(src[j]));
354        }
355#else
356        for (int i = 0; i < 9; i++) {
357            matrix->set(i, src[i]);
358        }
359#endif
360    }
361
362    static jboolean equals(JNIEnv* env, jobject clazz, const SkMatrix* a, const SkMatrix* b) {
363        return *a == *b;
364    }
365 };
366
367static JNINativeMethod methods[] = {
368    {"finalizer", "(I)V", (void*) SkMatrixGlue::finalizer},
369    {"native_create","(I)I", (void*) SkMatrixGlue::create},
370    {"native_isIdentity","(I)Z", (void*) SkMatrixGlue::isIdentity},
371    {"native_rectStaysRect","(I)Z", (void*) SkMatrixGlue::rectStaysRect},
372    {"native_reset","(I)V", (void*) SkMatrixGlue::reset},
373    {"native_set","(II)V", (void*) SkMatrixGlue::set},
374    {"native_setTranslate","(IFF)V", (void*) SkMatrixGlue::setTranslate},
375    {"native_setScale","(IFFFF)V", (void*) SkMatrixGlue::setScale__FFFF},
376    {"native_setScale","(IFF)V", (void*) SkMatrixGlue::setScale__FF},
377    {"native_setRotate","(IFFF)V", (void*) SkMatrixGlue::setRotate__FFF},
378    {"native_setRotate","(IF)V", (void*) SkMatrixGlue::setRotate__F},
379    {"native_setSinCos","(IFFFF)V", (void*) SkMatrixGlue::setSinCos__FFFF},
380    {"native_setSinCos","(IFF)V", (void*) SkMatrixGlue::setSinCos__FF},
381    {"native_setSkew","(IFFFF)V", (void*) SkMatrixGlue::setSkew__FFFF},
382    {"native_setSkew","(IFF)V", (void*) SkMatrixGlue::setSkew__FF},
383    {"native_setConcat","(III)Z", (void*) SkMatrixGlue::setConcat},
384    {"native_preTranslate","(IFF)Z", (void*) SkMatrixGlue::preTranslate},
385    {"native_preScale","(IFFFF)Z", (void*) SkMatrixGlue::preScale__FFFF},
386    {"native_preScale","(IFF)Z", (void*) SkMatrixGlue::preScale__FF},
387    {"native_preRotate","(IFFF)Z", (void*) SkMatrixGlue::preRotate__FFF},
388    {"native_preRotate","(IF)Z", (void*) SkMatrixGlue::preRotate__F},
389    {"native_preSkew","(IFFFF)Z", (void*) SkMatrixGlue::preSkew__FFFF},
390    {"native_preSkew","(IFF)Z", (void*) SkMatrixGlue::preSkew__FF},
391    {"native_preConcat","(II)Z", (void*) SkMatrixGlue::preConcat},
392    {"native_postTranslate","(IFF)Z", (void*) SkMatrixGlue::postTranslate},
393    {"native_postScale","(IFFFF)Z", (void*) SkMatrixGlue::postScale__FFFF},
394    {"native_postScale","(IFF)Z", (void*) SkMatrixGlue::postScale__FF},
395    {"native_postRotate","(IFFF)Z", (void*) SkMatrixGlue::postRotate__FFF},
396    {"native_postRotate","(IF)Z", (void*) SkMatrixGlue::postRotate__F},
397    {"native_postSkew","(IFFFF)Z", (void*) SkMatrixGlue::postSkew__FFFF},
398    {"native_postSkew","(IFF)Z", (void*) SkMatrixGlue::postSkew__FF},
399    {"native_postConcat","(II)Z", (void*) SkMatrixGlue::postConcat},
400    {"native_setRectToRect","(ILandroid/graphics/RectF;Landroid/graphics/RectF;I)Z", (void*) SkMatrixGlue::setRectToRect},
401    {"native_setPolyToPoly","(I[FI[FII)Z", (void*) SkMatrixGlue::setPolyToPoly},
402    {"native_invert","(II)Z", (void*) SkMatrixGlue::invert},
403    {"native_mapPoints","(I[FI[FIIZ)V", (void*) SkMatrixGlue::mapPoints},
404    {"native_mapRect","(ILandroid/graphics/RectF;Landroid/graphics/RectF;)Z", (void*) SkMatrixGlue::mapRect__RectFRectF},
405    {"native_mapRadius","(IF)F", (void*) SkMatrixGlue::mapRadius},
406    {"native_getValues","(I[F)V", (void*) SkMatrixGlue::getValues},
407    {"native_setValues","(I[F)V", (void*) SkMatrixGlue::setValues},
408    {"native_equals", "(II)Z", (void*) SkMatrixGlue::equals}
409};
410
411static jfieldID sNativeInstanceField;
412
413int register_android_graphics_Matrix(JNIEnv* env) {
414    int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Matrix", methods,
415        sizeof(methods) / sizeof(methods[0]));
416
417    jclass clazz = env->FindClass("android/graphics/Matrix");
418    sNativeInstanceField = env->GetFieldID(clazz, "native_instance", "I");
419
420    return result;
421}
422
423SkMatrix* android_graphics_Matrix_getSkMatrix(JNIEnv* env, jobject matrixObj) {
424    return reinterpret_cast<SkMatrix*>(env->GetIntField(matrixObj, sNativeInstanceField));
425}
426
427}
428