1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 * This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6
7 #include "mozilla/MemoryReporting.h"
8 #if defined(HAVE_POSIX_MEMALIGN)
9 #include "gfxAlphaRecovery.h"
10 #endif
11 #include "gfxImageSurface.h"
12
13 #include "cairo.h"
14 #include "mozilla/gfx/2D.h"
15 #include "mozilla/gfx/HelpersCairo.h"
16 #include "gfx2DGlue.h"
17 #include <algorithm>
18
19 using namespace mozilla;
20 using namespace mozilla::gfx;
21
gfxImageSurface()22 gfxImageSurface::gfxImageSurface()
23 : mSize(0, 0),
24 mOwnsData(false),
25 mFormat(SurfaceFormat::UNKNOWN),
26 mStride(0)
27 {
28 }
29
30 void
InitFromSurface(cairo_surface_t * csurf)31 gfxImageSurface::InitFromSurface(cairo_surface_t *csurf)
32 {
33 if (!csurf || cairo_surface_status(csurf)) {
34 MakeInvalid();
35 return;
36 }
37
38 mSize.width = cairo_image_surface_get_width(csurf);
39 mSize.height = cairo_image_surface_get_height(csurf);
40 mData = cairo_image_surface_get_data(csurf);
41 mFormat = CairoFormatToGfxFormat(cairo_image_surface_get_format(csurf));
42 mOwnsData = false;
43 mStride = cairo_image_surface_get_stride(csurf);
44
45 Init(csurf, true);
46 }
47
gfxImageSurface(unsigned char * aData,const IntSize & aSize,long aStride,gfxImageFormat aFormat)48 gfxImageSurface::gfxImageSurface(unsigned char *aData, const IntSize& aSize,
49 long aStride, gfxImageFormat aFormat)
50 {
51 InitWithData(aData, aSize, aStride, aFormat);
52 }
53
54 void
MakeInvalid()55 gfxImageSurface::MakeInvalid()
56 {
57 mSize = IntSize(-1, -1);
58 mData = nullptr;
59 mStride = 0;
60 }
61
62 void
InitWithData(unsigned char * aData,const IntSize & aSize,long aStride,gfxImageFormat aFormat)63 gfxImageSurface::InitWithData(unsigned char *aData, const IntSize& aSize,
64 long aStride, gfxImageFormat aFormat)
65 {
66 mSize = aSize;
67 mOwnsData = false;
68 mData = aData;
69 mFormat = aFormat;
70 mStride = aStride;
71
72 if (!Factory::CheckSurfaceSize(aSize))
73 MakeInvalid();
74
75 cairo_format_t cformat = GfxFormatToCairoFormat(mFormat);
76 cairo_surface_t *surface =
77 cairo_image_surface_create_for_data((unsigned char*)mData,
78 cformat,
79 mSize.width,
80 mSize.height,
81 mStride);
82
83 // cairo_image_surface_create_for_data can return a 'null' surface
84 // in out of memory conditions. The gfxASurface::Init call checks
85 // the surface it receives to see if there is an error with the
86 // surface and handles it appropriately. That is why there is
87 // no check here.
88 Init(surface);
89 }
90
91 static void*
TryAllocAlignedBytes(size_t aSize)92 TryAllocAlignedBytes(size_t aSize)
93 {
94 // Use fallible allocators here
95 #if defined(HAVE_POSIX_MEMALIGN)
96 void* ptr;
97 // Try to align for fast alpha recovery. This should only help
98 // cairo too, can't hurt.
99 return moz_posix_memalign(&ptr,
100 1 << gfxAlphaRecovery::GoodAlignmentLog2(),
101 aSize) ?
102 nullptr : ptr;
103 #else
104 // Oh well, hope that luck is with us in the allocator
105 return malloc(aSize);
106 #endif
107 }
108
gfxImageSurface(const IntSize & size,gfxImageFormat format,bool aClear)109 gfxImageSurface::gfxImageSurface(const IntSize& size, gfxImageFormat format, bool aClear)
110 : mSize(size), mData(nullptr), mFormat(format)
111 {
112 AllocateAndInit(0, 0, aClear);
113 }
114
115 void
AllocateAndInit(long aStride,int32_t aMinimalAllocation,bool aClear)116 gfxImageSurface::AllocateAndInit(long aStride, int32_t aMinimalAllocation,
117 bool aClear)
118 {
119 // The callers should set mSize and mFormat.
120 MOZ_ASSERT(!mData);
121 mData = nullptr;
122 mOwnsData = false;
123
124 mStride = aStride > 0 ? aStride : ComputeStride();
125 if (aMinimalAllocation < mSize.height * mStride)
126 aMinimalAllocation = mSize.height * mStride;
127
128 if (!Factory::CheckSurfaceSize(mSize))
129 MakeInvalid();
130
131 // if we have a zero-sized surface, just leave mData nullptr
132 if (mSize.height * mStride > 0) {
133
134 // This can fail to allocate memory aligned as we requested,
135 // or it can fail to allocate any memory at all.
136 mData = (unsigned char *) TryAllocAlignedBytes(aMinimalAllocation);
137 if (!mData)
138 return;
139 if (aClear)
140 memset(mData, 0, aMinimalAllocation);
141 }
142
143 mOwnsData = true;
144
145 cairo_format_t cformat = GfxFormatToCairoFormat(mFormat);
146 cairo_surface_t *surface =
147 cairo_image_surface_create_for_data((unsigned char*)mData,
148 cformat,
149 mSize.width,
150 mSize.height,
151 mStride);
152
153 Init(surface);
154
155 if (mSurfaceValid) {
156 RecordMemoryUsed(mSize.height * ComputeStride() +
157 sizeof(gfxImageSurface));
158 }
159 }
160
gfxImageSurface(const IntSize & size,gfxImageFormat format,long aStride,int32_t aExtraBytes,bool aClear)161 gfxImageSurface::gfxImageSurface(const IntSize& size, gfxImageFormat format,
162 long aStride, int32_t aExtraBytes, bool aClear)
163 : mSize(size), mData(nullptr), mFormat(format)
164 {
165 AllocateAndInit(aStride, aExtraBytes, aClear);
166 }
167
gfxImageSurface(cairo_surface_t * csurf)168 gfxImageSurface::gfxImageSurface(cairo_surface_t *csurf)
169 {
170 mSize.width = cairo_image_surface_get_width(csurf);
171 mSize.height = cairo_image_surface_get_height(csurf);
172 mData = cairo_image_surface_get_data(csurf);
173 mFormat = CairoFormatToGfxFormat(cairo_image_surface_get_format(csurf));
174 mOwnsData = false;
175 mStride = cairo_image_surface_get_stride(csurf);
176
177 Init(csurf, true);
178 }
179
~gfxImageSurface()180 gfxImageSurface::~gfxImageSurface()
181 {
182 if (mOwnsData)
183 free(mData);
184 }
185
186 /*static*/ long
ComputeStride(const IntSize & aSize,gfxImageFormat aFormat)187 gfxImageSurface::ComputeStride(const IntSize& aSize, gfxImageFormat aFormat)
188 {
189 long stride;
190
191 if (aFormat == SurfaceFormat::A8R8G8B8_UINT32)
192 stride = aSize.width * 4;
193 else if (aFormat == SurfaceFormat::X8R8G8B8_UINT32)
194 stride = aSize.width * 4;
195 else if (aFormat == SurfaceFormat::R5G6B5_UINT16)
196 stride = aSize.width * 2;
197 else if (aFormat == SurfaceFormat::A8)
198 stride = aSize.width;
199 else {
200 NS_WARNING("Unknown format specified to gfxImageSurface!");
201 stride = aSize.width * 4;
202 }
203
204 stride = ((stride + 3) / 4) * 4;
205
206 return stride;
207 }
208
209 size_t
SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const210 gfxImageSurface::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
211 {
212 size_t n = gfxASurface::SizeOfExcludingThis(aMallocSizeOf);
213 if (mOwnsData) {
214 n += aMallocSizeOf(mData);
215 }
216 return n;
217 }
218
219 size_t
SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const220 gfxImageSurface::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
221 {
222 return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
223 }
224
225 bool
SizeOfIsMeasured() const226 gfxImageSurface::SizeOfIsMeasured() const
227 {
228 return true;
229 }
230
231 // helper function for the CopyFrom methods
232 static void
CopyForStride(unsigned char * aDest,unsigned char * aSrc,const IntSize & aSize,long aDestStride,long aSrcStride)233 CopyForStride(unsigned char* aDest, unsigned char* aSrc, const IntSize& aSize, long aDestStride, long aSrcStride)
234 {
235 if (aDestStride == aSrcStride) {
236 memcpy (aDest, aSrc, aSrcStride * aSize.height);
237 } else {
238 int lineSize = std::min(aDestStride, aSrcStride);
239 for (int i = 0; i < aSize.height; i++) {
240 unsigned char* src = aSrc + aSrcStride * i;
241 unsigned char* dst = aDest + aDestStride * i;
242
243 memcpy (dst, src, lineSize);
244 }
245 }
246 }
247
248 // helper function for the CopyFrom methods
249 static bool
FormatsAreCompatible(gfxImageFormat a1,gfxImageFormat a2)250 FormatsAreCompatible(gfxImageFormat a1, gfxImageFormat a2)
251 {
252 if (a1 != a2 &&
253 !(a1 == SurfaceFormat::A8R8G8B8_UINT32 &&
254 a2 == SurfaceFormat::X8R8G8B8_UINT32) &&
255 !(a1 == SurfaceFormat::X8R8G8B8_UINT32 &&
256 a2 == SurfaceFormat::A8R8G8B8_UINT32)) {
257 return false;
258 }
259
260 return true;
261 }
262
263 bool
CopyFrom(SourceSurface * aSurface)264 gfxImageSurface::CopyFrom (SourceSurface *aSurface)
265 {
266 RefPtr<DataSourceSurface> data = aSurface->GetDataSurface();
267
268 if (!data) {
269 return false;
270 }
271
272 IntSize size(data->GetSize().width, data->GetSize().height);
273 if (size != mSize) {
274 return false;
275 }
276
277 if (!FormatsAreCompatible(SurfaceFormatToImageFormat(aSurface->GetFormat()),
278 mFormat)) {
279 return false;
280 }
281
282 CopyForStride(mData, data->GetData(), size, mStride, data->Stride());
283
284 return true;
285 }
286
287
288 bool
CopyFrom(gfxImageSurface * other)289 gfxImageSurface::CopyFrom(gfxImageSurface *other)
290 {
291 if (other->mSize != mSize) {
292 return false;
293 }
294
295 if (!FormatsAreCompatible(other->mFormat, mFormat)) {
296 return false;
297 }
298
299 CopyForStride(mData, other->mData, mSize, mStride, other->mStride);
300
301 return true;
302 }
303
304 bool
CopyTo(SourceSurface * aSurface)305 gfxImageSurface::CopyTo(SourceSurface *aSurface) {
306 RefPtr<DataSourceSurface> data = aSurface->GetDataSurface();
307
308 if (!data) {
309 return false;
310 }
311
312 IntSize size(data->GetSize().width, data->GetSize().height);
313 if (size != mSize) {
314 return false;
315 }
316
317 if (!FormatsAreCompatible(SurfaceFormatToImageFormat(aSurface->GetFormat()),
318 mFormat)) {
319 return false;
320 }
321
322 CopyForStride(data->GetData(), mData, size, data->Stride(), mStride);
323
324 return true;
325 }
326
327 already_AddRefed<DataSourceSurface>
CopyToB8G8R8A8DataSourceSurface()328 gfxImageSurface::CopyToB8G8R8A8DataSourceSurface()
329 {
330 RefPtr<DataSourceSurface> dataSurface =
331 Factory::CreateDataSourceSurface(IntSize(GetSize().width, GetSize().height),
332 SurfaceFormat::B8G8R8A8);
333 if (dataSurface) {
334 CopyTo(dataSurface);
335 }
336 return dataSurface.forget();
337 }
338
339 already_AddRefed<gfxSubimageSurface>
GetSubimage(const gfxRect & aRect)340 gfxImageSurface::GetSubimage(const gfxRect& aRect)
341 {
342 gfxRect r(aRect);
343 r.Round();
344 MOZ_ASSERT(gfxRect(0, 0, mSize.width, mSize.height).Contains(r));
345
346 gfxImageFormat format = Format();
347
348 unsigned char* subData = Data() +
349 (Stride() * (int)r.Y()) +
350 (int)r.X() * gfxASurface::BytePerPixelFromFormat(Format());
351
352 if (format == SurfaceFormat::A8R8G8B8_UINT32 &&
353 GetOpaqueRect().Contains(aRect)) {
354 format = SurfaceFormat::X8R8G8B8_UINT32;
355 }
356
357 RefPtr<gfxSubimageSurface> image =
358 new gfxSubimageSurface(this, subData,
359 IntSize((int)r.Width(), (int)r.Height()),
360 format);
361
362 return image.forget();
363 }
364
gfxSubimageSurface(gfxImageSurface * aParent,unsigned char * aData,const IntSize & aSize,gfxImageFormat aFormat)365 gfxSubimageSurface::gfxSubimageSurface(gfxImageSurface* aParent,
366 unsigned char* aData,
367 const IntSize& aSize,
368 gfxImageFormat aFormat)
369 : gfxImageSurface(aData, aSize, aParent->Stride(), aFormat)
370 , mParent(aParent)
371 {
372 }
373
374 already_AddRefed<gfxImageSurface>
GetAsImageSurface()375 gfxImageSurface::GetAsImageSurface()
376 {
377 RefPtr<gfxImageSurface> surface = this;
378 return surface.forget();
379 }
380