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