sk_surface.cpp revision 4a7940bf5e4de6396fd48bbfdbf883e696b19b35 
1/*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "SkCanvas.h"
9#include "SkData.h"
10#include "SkImage.h"
11#include "SkMaskFilter.h"
12#include "SkMatrix.h"
13#include "SkPaint.h"
14#include "SkPath.h"
15#include "SkPictureRecorder.h"
16#include "SkSurface.h"
17
18#include "sk_canvas.h"
19#include "sk_data.h"
20#include "sk_image.h"
21#include "sk_paint.h"
22#include "sk_path.h"
23#include "sk_surface.h"
24#include "sk_types_priv.h"
25
26const struct {
27    sk_colortype_t  fC;
28    SkColorType     fSK;
29} gColorTypeMap[] = {
30    { UNKNOWN_SK_COLORTYPE,     kUnknown_SkColorType    },
31    { RGBA_8888_SK_COLORTYPE,   kRGBA_8888_SkColorType  },
32    { BGRA_8888_SK_COLORTYPE,   kBGRA_8888_SkColorType  },
33    { ALPHA_8_SK_COLORTYPE,     kAlpha_8_SkColorType    },
34};
35
36const struct {
37    sk_alphatype_t  fC;
38    SkAlphaType     fSK;
39} gAlphaTypeMap[] = {
40    { OPAQUE_SK_ALPHATYPE,      kOpaque_SkAlphaType     },
41    { PREMUL_SK_ALPHATYPE,      kPremul_SkAlphaType     },
42    { UNPREMUL_SK_ALPHATYPE,    kUnpremul_SkAlphaType   },
43};
44
45static bool from_c_colortype(sk_colortype_t cCT, SkColorType* skCT) {
46    for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypeMap); ++i) {
47        if (gColorTypeMap[i].fC == cCT) {
48            if (skCT) {
49                *skCT = gColorTypeMap[i].fSK;
50            }
51            return true;
52        }
53    }
54    return false;
55}
56
57static bool to_c_colortype(SkColorType skCT, sk_colortype_t* cCT) {
58    for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypeMap); ++i) {
59        if (gColorTypeMap[i].fSK == skCT) {
60            if (cCT) {
61                *cCT = gColorTypeMap[i].fC;
62            }
63            return true;
64        }
65    }
66    return false;
67}
68
69static bool from_c_alphatype(sk_alphatype_t cAT, SkAlphaType* skAT) {
70    for (size_t i = 0; i < SK_ARRAY_COUNT(gAlphaTypeMap); ++i) {
71        if (gAlphaTypeMap[i].fC == cAT) {
72            if (skAT) {
73                *skAT = gAlphaTypeMap[i].fSK;
74            }
75            return true;
76        }
77    }
78    return false;
79}
80
81static bool from_c_info(const sk_imageinfo_t& cinfo, SkImageInfo* info) {
82    SkColorType ct;
83    SkAlphaType at;
84
85    if (!from_c_colortype(cinfo.colorType, &ct)) {
86        // optionally report error to client?
87        return false;
88    }
89    if (!from_c_alphatype(cinfo.alphaType, &at)) {
90        // optionally report error to client?
91        return false;
92    }
93    if (info) {
94        *info = SkImageInfo::Make(cinfo.width, cinfo.height, ct, at);
95    }
96    return true;
97}
98
99const struct {
100    sk_pixelgeometry_t fC;
101    SkPixelGeometry    fSK;
102} gPixelGeometryMap[] = {
103    { UNKNOWN_SK_PIXELGEOMETRY, kUnknown_SkPixelGeometry },
104    { RGB_H_SK_PIXELGEOMETRY,   kRGB_H_SkPixelGeometry   },
105    { BGR_H_SK_PIXELGEOMETRY,   kBGR_H_SkPixelGeometry   },
106    { RGB_V_SK_PIXELGEOMETRY,   kRGB_V_SkPixelGeometry   },
107    { BGR_V_SK_PIXELGEOMETRY,   kBGR_V_SkPixelGeometry   },
108};
109
110
111static bool from_c_pixelgeometry(sk_pixelgeometry_t cGeom, SkPixelGeometry* skGeom) {
112    for (size_t i = 0; i < SK_ARRAY_COUNT(gPixelGeometryMap); ++i) {
113        if (gPixelGeometryMap[i].fC == cGeom) {
114            if (skGeom) {
115                *skGeom = gPixelGeometryMap[i].fSK;
116            }
117            return true;
118        }
119    }
120    return false;
121}
122
123static void from_c_matrix(const sk_matrix_t* cmatrix, SkMatrix* matrix) {
124    matrix->setAll(cmatrix->mat[0], cmatrix->mat[1], cmatrix->mat[2],
125                   cmatrix->mat[3], cmatrix->mat[4], cmatrix->mat[5],
126                   cmatrix->mat[6], cmatrix->mat[7], cmatrix->mat[8]);
127}
128
129const struct {
130    sk_path_direction_t fC;
131    SkPath::Direction   fSk;
132} gPathDirMap[] = {
133    { CW_SK_PATH_DIRECTION,  SkPath::kCW_Direction },
134    { CCW_SK_PATH_DIRECTION, SkPath::kCCW_Direction },
135};
136
137static bool from_c_path_direction(sk_path_direction_t cdir, SkPath::Direction* dir) {
138    for (size_t i = 0; i < SK_ARRAY_COUNT(gPathDirMap); ++i) {
139        if (gPathDirMap[i].fC == cdir) {
140            if (dir) {
141                *dir = gPathDirMap[i].fSk;
142            }
143            return true;
144        }
145    }
146    return false;
147}
148
149static SkData* AsData(const sk_data_t* cdata) {
150    return reinterpret_cast<SkData*>(const_cast<sk_data_t*>(cdata));
151}
152
153static sk_data_t* ToData(SkData* data) {
154    return reinterpret_cast<sk_data_t*>(data);
155}
156
157static sk_rect_t ToRect(const SkRect& rect) {
158    return reinterpret_cast<const sk_rect_t&>(rect);
159}
160
161static const SkRect& AsRect(const sk_rect_t& crect) {
162    return reinterpret_cast<const SkRect&>(crect);
163}
164
165static const SkPath& AsPath(const sk_path_t& cpath) {
166    return reinterpret_cast<const SkPath&>(cpath);
167}
168
169static SkPath* as_path(sk_path_t* cpath) {
170    return reinterpret_cast<SkPath*>(cpath);
171}
172
173static const SkImage* AsImage(const sk_image_t* cimage) {
174    return reinterpret_cast<const SkImage*>(cimage);
175}
176
177static sk_image_t* ToImage(SkImage* cimage) {
178    return reinterpret_cast<sk_image_t*>(cimage);
179}
180
181static sk_canvas_t* ToCanvas(SkCanvas* canvas) {
182    return reinterpret_cast<sk_canvas_t*>(canvas);
183}
184
185static SkCanvas* AsCanvas(sk_canvas_t* ccanvas) {
186    return reinterpret_cast<SkCanvas*>(ccanvas);
187}
188
189static SkPictureRecorder* AsPictureRecorder(sk_picture_recorder_t* crec) {
190    return reinterpret_cast<SkPictureRecorder*>(crec);
191}
192
193static sk_picture_recorder_t* ToPictureRecorder(SkPictureRecorder* rec) {
194    return reinterpret_cast<sk_picture_recorder_t*>(rec);
195}
196
197static const SkPicture* AsPicture(const sk_picture_t* cpic) {
198    return reinterpret_cast<const SkPicture*>(cpic);
199}
200
201static SkPicture* AsPicture(sk_picture_t* cpic) {
202    return reinterpret_cast<SkPicture*>(cpic);
203}
204
205static sk_picture_t* ToPicture(SkPicture* pic) {
206    return reinterpret_cast<sk_picture_t*>(pic);
207}
208
209///////////////////////////////////////////////////////////////////////////////////////////
210
211sk_colortype_t sk_colortype_get_default_8888() {
212    sk_colortype_t ct;
213    if (!to_c_colortype(kN32_SkColorType, &ct)) {
214        ct = UNKNOWN_SK_COLORTYPE;
215    }
216    return ct;
217}
218
219///////////////////////////////////////////////////////////////////////////////////////////
220
221sk_image_t* sk_image_new_raster_copy(const sk_imageinfo_t* cinfo, const void* pixels,
222                                     size_t rowBytes) {
223    SkImageInfo info;
224    if (!from_c_info(*cinfo, &info)) {
225        return NULL;
226    }
227    return (sk_image_t*)SkImage::NewRasterCopy(info, pixels, rowBytes);
228}
229
230sk_image_t* sk_image_new_from_encoded(const sk_data_t* cdata, const sk_irect_t* subset) {
231    return ToImage(SkImage::NewFromEncoded(AsData(cdata),
232                                           reinterpret_cast<const SkIRect*>(subset)));
233}
234
235sk_data_t* sk_image_encode(const sk_image_t* cimage) {
236    return ToData(AsImage(cimage)->encode());
237}
238
239void sk_image_ref(const sk_image_t* cimage) {
240    AsImage(cimage)->ref();
241}
242
243void sk_image_unref(const sk_image_t* cimage) {
244    AsImage(cimage)->unref();
245}
246
247int sk_image_get_width(const sk_image_t* cimage) {
248    return AsImage(cimage)->width();
249}
250
251int sk_image_get_height(const sk_image_t* cimage) {
252    return AsImage(cimage)->height();
253}
254
255uint32_t sk_image_get_unique_id(const sk_image_t* cimage) {
256    return AsImage(cimage)->uniqueID();
257}
258
259///////////////////////////////////////////////////////////////////////////////////////////
260
261sk_path_t* sk_path_new() { return (sk_path_t*)new SkPath; }
262
263void sk_path_delete(sk_path_t* cpath) { delete as_path(cpath); }
264
265void sk_path_move_to(sk_path_t* cpath, float x, float y) {
266    as_path(cpath)->moveTo(x, y);
267}
268
269void sk_path_line_to(sk_path_t* cpath, float x, float y) {
270    as_path(cpath)->lineTo(x, y);
271}
272
273void sk_path_quad_to(sk_path_t* cpath, float x0, float y0, float x1, float y1) {
274    as_path(cpath)->quadTo(x0, y0, x1, y1);
275}
276
277void sk_path_conic_to(sk_path_t* cpath, float x0, float y0, float x1, float y1, float w) {
278    as_path(cpath)->conicTo(x0, y0, x1, y1, w);
279}
280
281void sk_path_cubic_to(sk_path_t* cpath, float x0, float y0, float x1, float y1, float x2, float y2) {
282    as_path(cpath)->cubicTo(x0, y0, x1, y1, x2, y2);
283}
284
285void sk_path_close(sk_path_t* cpath) {
286    as_path(cpath)->close();
287}
288
289void sk_path_add_rect(sk_path_t* cpath, const sk_rect_t* crect, sk_path_direction_t cdir) {
290    SkPath::Direction dir;
291    if (!from_c_path_direction(cdir, &dir)) {
292        return;
293    }
294    as_path(cpath)->addRect(AsRect(*crect), dir);
295}
296
297void sk_path_add_oval(sk_path_t* cpath, const sk_rect_t* crect, sk_path_direction_t cdir) {
298    SkPath::Direction dir;
299    if (!from_c_path_direction(cdir, &dir)) {
300        return;
301    }
302    as_path(cpath)->addOval(AsRect(*crect), dir);
303}
304
305bool sk_path_get_bounds(const sk_path_t* cpath, sk_rect_t* crect) {
306    const SkPath& path = AsPath(*cpath);
307
308    if (path.isEmpty()) {
309        if (crect) {
310            *crect = ToRect(SkRect::MakeEmpty());
311        }
312        return false;
313    }
314
315    if (crect) {
316        *crect = ToRect(path.getBounds());
317    }
318    return true;
319}
320
321///////////////////////////////////////////////////////////////////////////////////////////
322
323void sk_canvas_save(sk_canvas_t* ccanvas) {
324    AsCanvas(ccanvas)->save();
325}
326
327void sk_canvas_save_layer(sk_canvas_t* ccanvas, const sk_rect_t* crect, const sk_paint_t* cpaint) {
328    AsCanvas(ccanvas)->drawRect(AsRect(*crect), AsPaint(*cpaint));
329}
330
331void sk_canvas_restore(sk_canvas_t* ccanvas) {
332    AsCanvas(ccanvas)->restore();
333}
334
335void sk_canvas_translate(sk_canvas_t* ccanvas, float dx, float dy) {
336    AsCanvas(ccanvas)->translate(dx, dy);
337}
338
339void sk_canvas_scale(sk_canvas_t* ccanvas, float sx, float sy) {
340    AsCanvas(ccanvas)->scale(sx, sy);
341}
342
343void sk_canvas_rotate_degress(sk_canvas_t* ccanvas, float degrees) {
344    AsCanvas(ccanvas)->rotate(degrees);
345}
346
347void sk_canvas_rotate_radians(sk_canvas_t* ccanvas, float radians) {
348    AsCanvas(ccanvas)->rotate(SkRadiansToDegrees(radians));
349}
350
351void sk_canvas_skew(sk_canvas_t* ccanvas, float sx, float sy) {
352    AsCanvas(ccanvas)->skew(sx, sy);
353}
354
355void sk_canvas_concat(sk_canvas_t* ccanvas, const sk_matrix_t* cmatrix) {
356    SkASSERT(cmatrix);
357    SkMatrix matrix;
358    from_c_matrix(cmatrix, &matrix);
359    AsCanvas(ccanvas)->concat(matrix);
360}
361
362void sk_canvas_clip_rect(sk_canvas_t* ccanvas, const sk_rect_t* crect) {
363    AsCanvas(ccanvas)->clipRect(AsRect(*crect));
364}
365
366void sk_canvas_clip_path(sk_canvas_t* ccanvas, const sk_path_t* cpath) {
367    AsCanvas(ccanvas)->clipPath(AsPath(*cpath));
368}
369
370void sk_canvas_draw_paint(sk_canvas_t* ccanvas, const sk_paint_t* cpaint) {
371    AsCanvas(ccanvas)->drawPaint(AsPaint(*cpaint));
372}
373
374void sk_canvas_draw_rect(sk_canvas_t* ccanvas, const sk_rect_t* crect, const sk_paint_t* cpaint) {
375    AsCanvas(ccanvas)->drawRect(AsRect(*crect), AsPaint(*cpaint));
376}
377
378void sk_canvas_draw_circle(sk_canvas_t* ccanvas, float cx, float cy, float rad,
379                           const sk_paint_t* cpaint) {
380    AsCanvas(ccanvas)->drawCircle(cx, cy, rad, AsPaint(*cpaint));
381}
382
383void sk_canvas_draw_oval(sk_canvas_t* ccanvas, const sk_rect_t* crect, const sk_paint_t* cpaint) {
384    AsCanvas(ccanvas)->drawOval(AsRect(*crect), AsPaint(*cpaint));
385}
386
387void sk_canvas_draw_path(sk_canvas_t* ccanvas, const sk_path_t* cpath, const sk_paint_t* cpaint) {
388    AsCanvas(ccanvas)->drawPath(AsPath(*cpath), AsPaint(*cpaint));
389}
390
391void sk_canvas_draw_image(sk_canvas_t* ccanvas, const sk_image_t* cimage, float x, float y,
392                          const sk_paint_t* cpaint) {
393    AsCanvas(ccanvas)->drawImage(AsImage(cimage), x, y, AsPaint(cpaint));
394}
395
396void sk_canvas_draw_image_rect(sk_canvas_t* ccanvas, const sk_image_t* cimage,
397                               const sk_rect_t* csrcR, const sk_rect_t* cdstR,
398                               const sk_paint_t* cpaint) {
399    SkCanvas* canvas = AsCanvas(ccanvas);
400    const SkImage* image = AsImage(cimage);
401    const SkRect& dst = AsRect(*cdstR);
402    const SkPaint* paint = AsPaint(cpaint);
403
404    if (csrcR) {
405        canvas->drawImageRect(image, AsRect(*csrcR), dst, paint);
406    } else {
407        canvas->drawImageRect(image, dst, paint);
408    }
409}
410
411void sk_canvas_draw_picture(sk_canvas_t* ccanvas, const sk_picture_t* cpicture,
412                            const sk_matrix_t* cmatrix, const sk_paint_t* cpaint) {
413    const SkMatrix* matrixPtr = NULL;
414    SkMatrix matrix;
415    if (cmatrix) {
416        from_c_matrix(cmatrix, &matrix);
417        matrixPtr = &matrix;
418    }
419    AsCanvas(ccanvas)->drawPicture(AsPicture(cpicture), matrixPtr, AsPaint(cpaint));
420}
421
422///////////////////////////////////////////////////////////////////////////////////////////
423
424sk_surface_t* sk_surface_new_raster(const sk_imageinfo_t* cinfo,
425                                    const sk_surfaceprops_t* props) {
426    SkImageInfo info;
427    if (!from_c_info(*cinfo, &info)) {
428        return NULL;
429    }
430    SkPixelGeometry geo = kUnknown_SkPixelGeometry;
431    if (props && !from_c_pixelgeometry(props->pixelGeometry, &geo)) {
432        return NULL;
433    }
434
435    SkSurfaceProps surfProps(0, geo);
436    return (sk_surface_t*)SkSurface::NewRaster(info, &surfProps);
437}
438
439sk_surface_t* sk_surface_new_raster_direct(const sk_imageinfo_t* cinfo, void* pixels,
440                                           size_t rowBytes,
441                                           const sk_surfaceprops_t* props) {
442    SkImageInfo info;
443    if (!from_c_info(*cinfo, &info)) {
444        return NULL;
445    }
446    SkPixelGeometry geo = kUnknown_SkPixelGeometry;
447    if (props && !from_c_pixelgeometry(props->pixelGeometry, &geo)) {
448        return NULL;
449    }
450
451    SkSurfaceProps surfProps(0, geo);
452    return (sk_surface_t*)SkSurface::NewRasterDirect(info, pixels, rowBytes, &surfProps);
453}
454
455void sk_surface_unref(sk_surface_t* csurf) {
456    SkSafeUnref((SkSurface*)csurf);
457}
458
459sk_canvas_t* sk_surface_get_canvas(sk_surface_t* csurf) {
460    SkSurface* surf = (SkSurface*)csurf;
461    return (sk_canvas_t*)surf->getCanvas();
462}
463
464sk_image_t* sk_surface_new_image_snapshot(sk_surface_t* csurf) {
465    SkSurface* surf = (SkSurface*)csurf;
466    return (sk_image_t*)surf->newImageSnapshot();
467}
468
469///////////////////////////////////////////////////////////////////////////////////////////
470
471sk_picture_recorder_t* sk_picture_recorder_new() {
472    return ToPictureRecorder(new SkPictureRecorder);
473}
474
475void sk_picture_recorder_delete(sk_picture_recorder_t* crec) {
476    delete AsPictureRecorder(crec);
477}
478
479sk_canvas_t* sk_picture_recorder_begin_recording(sk_picture_recorder_t* crec,
480                                                 const sk_rect_t* cbounds) {
481    return ToCanvas(AsPictureRecorder(crec)->beginRecording(AsRect(*cbounds)));
482}
483
484sk_picture_t* sk_picture_recorder_end_recording(sk_picture_recorder_t* crec) {
485    return ToPicture(AsPictureRecorder(crec)->endRecording());
486}
487
488void sk_picture_ref(sk_picture_t* cpic) {
489    SkSafeRef(AsPicture(cpic));
490}
491
492void sk_picture_unref(sk_picture_t* cpic) {
493    SkSafeUnref(AsPicture(cpic));
494}
495
496uint32_t sk_picture_get_unique_id(sk_picture_t* cpic) {
497    return AsPicture(cpic)->uniqueID();
498}
499
500sk_rect_t sk_picture_get_bounds(sk_picture_t* cpic) {
501    return ToRect(AsPicture(cpic)->cullRect());
502}
503
504///////////////////////////////////////////////////////////////////////////////////////////
505
506#include "../../include/effects/SkGradientShader.h"
507#include "sk_shader.h"
508
509const struct {
510    sk_shader_tilemode_t    fC;
511    SkShader::TileMode      fSK;
512} gTileModeMap[] = {
513    { CLAMP_SK_SHADER_TILEMODE,     SkShader::kClamp_TileMode },
514    { REPEAT_SK_SHADER_TILEMODE,    SkShader::kRepeat_TileMode },
515    { MIRROR_SK_SHADER_TILEMODE,    SkShader::kMirror_TileMode  },
516};
517
518static bool from_c_tilemode(sk_shader_tilemode_t cMode, SkShader::TileMode* skMode) {
519    for (size_t i = 0; i < SK_ARRAY_COUNT(gTileModeMap); ++i) {
520        if (cMode == gTileModeMap[i].fC) {
521            if (skMode) {
522                *skMode = gTileModeMap[i].fSK;
523            }
524            return true;
525        }
526    }
527    return false;
528}
529
530void sk_shader_ref(sk_shader_t* cshader) {
531    SkSafeRef(AsShader(cshader));
532}
533
534void sk_shader_unref(sk_shader_t* cshader) {
535    SkSafeUnref(AsShader(cshader));
536}
537
538sk_shader_t* sk_shader_new_linear_gradient(const sk_point_t pts[2],
539                                           const sk_color_t colors[],
540                                           const float colorPos[],
541                                           int colorCount,
542                                           sk_shader_tilemode_t cmode,
543                                           const sk_matrix_t* cmatrix) {
544    SkShader::TileMode mode;
545    if (!from_c_tilemode(cmode, &mode)) {
546        return NULL;
547    }
548    SkMatrix matrix;
549    if (cmatrix) {
550        from_c_matrix(cmatrix, &matrix);
551    } else {
552        matrix.setIdentity();
553    }
554    SkShader* s = SkGradientShader::CreateLinear(reinterpret_cast<const SkPoint*>(pts),
555                                                 reinterpret_cast<const SkColor*>(colors),
556                                                 colorPos, colorCount, mode, 0, &matrix);
557    return (sk_shader_t*)s;
558}
559
560static const SkPoint& to_skpoint(const sk_point_t& p) {
561    return reinterpret_cast<const SkPoint&>(p);
562}
563
564sk_shader_t* sk_shader_new_radial_gradient(const sk_point_t* ccenter,
565                                           float radius,
566                                           const sk_color_t colors[],
567                                           const float colorPos[],
568                                           int colorCount,
569                                           sk_shader_tilemode_t cmode,
570                                           const sk_matrix_t* cmatrix) {
571    SkShader::TileMode mode;
572    if (!from_c_tilemode(cmode, &mode)) {
573        return NULL;
574    }
575    SkMatrix matrix;
576    if (cmatrix) {
577        from_c_matrix(cmatrix, &matrix);
578    } else {
579        matrix.setIdentity();
580    }
581    SkPoint center = to_skpoint(*ccenter);
582    SkShader* s = SkGradientShader::CreateRadial(
583            center, (SkScalar)radius,
584            reinterpret_cast<const SkColor*>(colors),
585            reinterpret_cast<const SkScalar*>(colorPos),
586            colorCount, mode, 0, &matrix);
587    return (sk_shader_t*)s;
588}
589
590sk_shader_t* sk_shader_new_sweep_gradient(const sk_point_t* ccenter,
591                                          const sk_color_t colors[],
592                                          const float colorPos[],
593                                          int colorCount,
594                                          const sk_matrix_t* cmatrix) {
595    SkMatrix matrix;
596    if (cmatrix) {
597        from_c_matrix(cmatrix, &matrix);
598    } else {
599        matrix.setIdentity();
600    }
601    SkShader* s = SkGradientShader::CreateSweep(
602            (SkScalar)(ccenter->x),
603            (SkScalar)(ccenter->y),
604            reinterpret_cast<const SkColor*>(colors),
605            reinterpret_cast<const SkScalar*>(colorPos),
606            colorCount, 0, &matrix);
607    return (sk_shader_t*)s;
608}
609
610sk_shader_t* sk_shader_new_two_point_conical_gradient(const sk_point_t* start,
611                                                      float startRadius,
612                                                      const sk_point_t* end,
613                                                      float endRadius,
614                                                      const sk_color_t colors[],
615                                                      const float colorPos[],
616                                                      int colorCount,
617                                                      sk_shader_tilemode_t cmode,
618                                                      const sk_matrix_t* cmatrix) {
619    SkShader::TileMode mode;
620    if (!from_c_tilemode(cmode, &mode)) {
621        return NULL;
622    }
623    SkMatrix matrix;
624    if (cmatrix) {
625        from_c_matrix(cmatrix, &matrix);
626    } else {
627        matrix.setIdentity();
628    }
629    SkPoint skstart = to_skpoint(*start);
630    SkPoint skend = to_skpoint(*end);
631    SkShader* s = SkGradientShader::CreateTwoPointConical(
632            skstart, (SkScalar)startRadius,
633            skend, (SkScalar)endRadius,
634            reinterpret_cast<const SkColor*>(colors),
635            reinterpret_cast<const SkScalar*>(colorPos),
636            colorCount, mode, 0, &matrix);
637    return (sk_shader_t*)s;
638}
639
640///////////////////////////////////////////////////////////////////////////////////////////
641
642#include "../../include/effects/SkBlurMaskFilter.h"
643#include "sk_maskfilter.h"
644
645const struct {
646    sk_blurstyle_t  fC;
647    SkBlurStyle     fSk;
648} gBlurStylePairs[] = {
649    { NORMAL_SK_BLUR_STYLE, kNormal_SkBlurStyle },
650    { SOLID_SK_BLUR_STYLE,  kSolid_SkBlurStyle },
651    { OUTER_SK_BLUR_STYLE,  kOuter_SkBlurStyle },
652    { INNER_SK_BLUR_STYLE,  kInner_SkBlurStyle },
653};
654
655static bool find_blurstyle(sk_blurstyle_t csrc, SkBlurStyle* dst) {
656    for (size_t i = 0; i < SK_ARRAY_COUNT(gBlurStylePairs); ++i) {
657        if (gBlurStylePairs[i].fC == csrc) {
658            if (dst) {
659                *dst = gBlurStylePairs[i].fSk;
660            }
661            return true;
662        }
663    }
664    return false;
665}
666
667void sk_maskfilter_ref(sk_maskfilter_t* cfilter) {
668    SkSafeRef(AsMaskFilter(cfilter));
669}
670
671void sk_maskfilter_unref(sk_maskfilter_t* cfilter) {
672    SkSafeUnref(AsMaskFilter(cfilter));
673}
674
675sk_maskfilter_t* sk_maskfilter_new_blur(sk_blurstyle_t cstyle, float sigma) {
676    SkBlurStyle style;
677    if (!find_blurstyle(cstyle, &style)) {
678        return NULL;
679    }
680    return ToMaskFilter(SkBlurMaskFilter::Create(style, sigma));
681}
682
683///////////////////////////////////////////////////////////////////////////////////////////
684
685sk_data_t* sk_data_new_with_copy(const void* src, size_t length) {
686    return ToData(SkData::NewWithCopy(src, length));
687}
688
689sk_data_t* sk_data_new_from_malloc(const void* memory, size_t length) {
690    return ToData(SkData::NewFromMalloc(memory, length));
691}
692
693sk_data_t* sk_data_new_subset(const sk_data_t* csrc, size_t offset, size_t length) {
694    return ToData(SkData::NewSubset(AsData(csrc), offset, length));
695}
696
697void sk_data_ref(const sk_data_t* cdata) {
698    SkSafeRef(AsData(cdata));
699}
700
701void sk_data_unref(const sk_data_t* cdata) {
702    SkSafeUnref(AsData(cdata));
703}
704
705size_t sk_data_get_size(const sk_data_t* cdata) {
706    return AsData(cdata)->size();
707}
708
709const void* sk_data_get_data(const sk_data_t* cdata) {
710    return AsData(cdata)->data();
711}
712
713///////////////////////////////////////////////////////////////////////////////////////////
714