widget/windows/nsWindowGfx.cpp@ac0c01689b40
widget/windows/nsWindowGfx.cpp
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/. */
6 /*
7 * nsWindowGfx - Painting and aceleration.
8 */
10 // XXX Future: this should really be a stand alone class stored as
11 // a member of nsWindow with getters and setters for things like render
12 // mode and methods for handling paint.
14 /**************************************************************
15 **************************************************************
16 **
17 ** BLOCK: Includes
18 **
19 ** Include headers.
20 **
21 **************************************************************
22 **************************************************************/
24 #include "mozilla/plugins/PluginInstanceParent.h"
25 using mozilla::plugins::PluginInstanceParent;
27 #include "nsWindowGfx.h"
28 #include <windows.h>
29 #include "gfxImageSurface.h"
30 #include "gfxUtils.h"
31 #include "gfxWindowsSurface.h"
32 #include "gfxWindowsPlatform.h"
33 #include "mozilla/gfx/2D.h"
34 #include "mozilla/gfx/DataSurfaceHelpers.h"
35 #include "mozilla/gfx/Tools.h"
36 #include "mozilla/RefPtr.h"
37 #include "nsGfxCIID.h"
38 #include "gfxContext.h"
39 #include "nsRenderingContext.h"
40 #include "prmem.h"
41 #include "WinUtils.h"
42 #include "nsIWidgetListener.h"
43 #include "mozilla/unused.h"
45 #ifdef MOZ_ENABLE_D3D9_LAYER
46 #include "LayerManagerD3D9.h"
47 #endif
48 #ifdef MOZ_ENABLE_D3D10_LAYER
49 #include "LayerManagerD3D10.h"
50 #endif
51 #include "mozilla/layers/CompositorParent.h"
52 #include "ClientLayerManager.h"
54 #include "nsUXThemeData.h"
55 #include "nsUXThemeConstants.h"
57 extern "C" {
58 #define PIXMAN_DONT_DEFINE_STDINT
59 #include "pixman.h"
60 }
62 using namespace mozilla;
63 using namespace mozilla::gfx;
64 using namespace mozilla::layers;
65 using namespace mozilla::widget;
67 /**************************************************************
68 **************************************************************
69 **
70 ** BLOCK: Variables
71 **
72 ** nsWindow Class static initializations and global variables.
73 **
74 **************************************************************
75 **************************************************************/
77 /**************************************************************
78 *
79 * SECTION: nsWindow statics
80 *
81 **************************************************************/
83 static nsAutoPtr<uint8_t> sSharedSurfaceData;
84 static gfxIntSize sSharedSurfaceSize;
86 struct IconMetrics {
87 int32_t xMetric;
88 int32_t yMetric;
89 int32_t defaultSize;
90 };
92 // Corresponds 1:1 to the IconSizeType enum
93 static IconMetrics sIconMetrics[] = {
94 {SM_CXSMICON, SM_CYSMICON, 16}, // small icon
95 {SM_CXICON, SM_CYICON, 32} // regular icon
96 };
98 /**************************************************************
99 **************************************************************
100 **
101 ** BLOCK: nsWindowGfx impl.
102 **
103 ** Misc. graphics related utilities.
104 **
105 **************************************************************
106 **************************************************************/
108 /* static */ bool
109 nsWindow::IsRenderMode(gfxWindowsPlatform::RenderMode rmode)
110 {
111 return gfxWindowsPlatform::GetPlatform()->GetRenderMode() == rmode;
112 }
114 /**************************************************************
115 **************************************************************
116 **
117 ** BLOCK: nsWindow impl.
118 **
119 ** Paint related nsWindow methods.
120 **
121 **************************************************************
122 **************************************************************/
124 // GetRegionToPaint returns the invalidated region that needs to be painted
125 nsIntRegion nsWindow::GetRegionToPaint(bool aForceFullRepaint,
126 PAINTSTRUCT ps, HDC aDC)
127 {
128 if (aForceFullRepaint) {
129 RECT paintRect;
130 ::GetClientRect(mWnd, &paintRect);
131 return nsIntRegion(WinUtils::ToIntRect(paintRect));
132 }
134 HRGN paintRgn = ::CreateRectRgn(0, 0, 0, 0);
135 if (paintRgn != nullptr) {
136 int result = GetRandomRgn(aDC, paintRgn, SYSRGN);
137 if (result == 1) {
138 POINT pt = {0,0};
139 ::MapWindowPoints(nullptr, mWnd, &pt, 1);
140 ::OffsetRgn(paintRgn, pt.x, pt.y);
141 }
142 nsIntRegion rgn(WinUtils::ConvertHRGNToRegion(paintRgn));
143 ::DeleteObject(paintRgn);
144 return rgn;
145 }
146 return nsIntRegion(WinUtils::ToIntRect(ps.rcPaint));
147 }
149 #define WORDSSIZE(x) ((x).width * (x).height)
150 static bool
151 EnsureSharedSurfaceSize(gfxIntSize size)
152 {
153 gfxIntSize screenSize;
154 screenSize.height = GetSystemMetrics(SM_CYSCREEN);
155 screenSize.width = GetSystemMetrics(SM_CXSCREEN);
157 if (WORDSSIZE(screenSize) > WORDSSIZE(size))
158 size = screenSize;
160 if (WORDSSIZE(screenSize) < WORDSSIZE(size))
161 NS_WARNING("Trying to create a shared surface larger than the screen");
163 if (!sSharedSurfaceData || (WORDSSIZE(size) > WORDSSIZE(sSharedSurfaceSize))) {
164 sSharedSurfaceSize = size;
165 sSharedSurfaceData = nullptr;
166 sSharedSurfaceData = (uint8_t *)malloc(WORDSSIZE(sSharedSurfaceSize) * 4);
167 }
169 return (sSharedSurfaceData != nullptr);
170 }
172 nsIWidgetListener* nsWindow::GetPaintListener()
173 {
174 if (mDestroyCalled)
175 return nullptr;
176 return mAttachedWidgetListener ? mAttachedWidgetListener : mWidgetListener;
177 }
179 bool nsWindow::OnPaint(HDC aDC, uint32_t aNestingLevel)
180 {
181 // We never have reentrant paint events, except when we're running our RPC
182 // windows event spin loop. If we don't trap for this, we'll try to paint,
183 // but view manager will refuse to paint the surface, resulting is black
184 // flashes on the plugin rendering surface.
185 if (mozilla::ipc::MessageChannel::IsSpinLoopActive() && mPainting)
186 return false;
188 if (mWindowType == eWindowType_plugin) {
190 /**
191 * After we CallUpdateWindow to the child, occasionally a WM_PAINT message
192 * is posted to the parent event loop with an empty update rect. Do a
193 * dummy paint so that Windows stops dispatching WM_PAINT in an inifinite
194 * loop. See bug 543788.
195 */
196 RECT updateRect;
197 if (!GetUpdateRect(mWnd, &updateRect, FALSE) ||
198 (updateRect.left == updateRect.right &&
199 updateRect.top == updateRect.bottom)) {
200 PAINTSTRUCT ps;
201 BeginPaint(mWnd, &ps);
202 EndPaint(mWnd, &ps);
203 return true;
204 }
206 PluginInstanceParent* instance = reinterpret_cast<PluginInstanceParent*>(
207 ::GetPropW(mWnd, L"PluginInstanceParentProperty"));
208 if (instance) {
209 unused << instance->CallUpdateWindow();
210 } else {
211 // We should never get here since in-process plugins should have
212 // subclassed our HWND and handled WM_PAINT, but in some cases that
213 // could fail. Return without asserting since it's not our fault.
214 NS_WARNING("Plugin failed to subclass our window");
215 }
217 ValidateRect(mWnd, nullptr);
218 return true;
219 }
221 ClientLayerManager *clientLayerManager =
222 (GetLayerManager()->GetBackendType() == LayersBackend::LAYERS_CLIENT)
223 ? static_cast<ClientLayerManager*>(GetLayerManager())
224 : nullptr;
226 if (clientLayerManager && mCompositorParent &&
227 !mBounds.IsEqualEdges(mLastPaintBounds))
228 {
229 // Do an early async composite so that we at least have something on the
230 // screen in the right place, even if the content is out of date.
231 mCompositorParent->ScheduleRenderOnCompositorThread();
232 }
233 mLastPaintBounds = mBounds;
235 PAINTSTRUCT ps;
237 #ifdef MOZ_XUL
238 if (!aDC && (eTransparencyTransparent == mTransparencyMode))
239 {
240 // For layered translucent windows all drawing should go to memory DC and no
241 // WM_PAINT messages are normally generated. To support asynchronous painting
242 // we force generation of WM_PAINT messages by invalidating window areas with
243 // RedrawWindow, InvalidateRect or InvalidateRgn function calls.
244 // BeginPaint/EndPaint must be called to make Windows think that invalid area
245 // is painted. Otherwise it will continue sending the same message endlessly.
246 ::BeginPaint(mWnd, &ps);
247 ::EndPaint(mWnd, &ps);
249 aDC = mMemoryDC;
250 }
251 #endif
253 mPainting = true;
255 #ifdef WIDGET_DEBUG_OUTPUT
256 HRGN debugPaintFlashRegion = nullptr;
257 HDC debugPaintFlashDC = nullptr;
259 if (debug_WantPaintFlashing())
260 {
261 debugPaintFlashRegion = ::CreateRectRgn(0, 0, 0, 0);
262 ::GetUpdateRgn(mWnd, debugPaintFlashRegion, TRUE);
263 debugPaintFlashDC = ::GetDC(mWnd);
264 }
265 #endif // WIDGET_DEBUG_OUTPUT
267 HDC hDC = aDC ? aDC : (::BeginPaint(mWnd, &ps));
268 mPaintDC = hDC;
270 #ifdef MOZ_XUL
271 bool forceRepaint = aDC || (eTransparencyTransparent == mTransparencyMode);
272 #else
273 bool forceRepaint = nullptr != aDC;
274 #endif
275 nsIntRegion region = GetRegionToPaint(forceRepaint, ps, hDC);
277 if (clientLayerManager && mCompositorParent) {
278 // We need to paint to the screen even if nothing changed, since if we
279 // don't have a compositing window manager, our pixels could be stale.
280 clientLayerManager->SetNeedsComposite(true);
281 clientLayerManager->SendInvalidRegion(region);
282 }
284 nsIWidgetListener* listener = GetPaintListener();
285 if (listener) {
286 listener->WillPaintWindow(this);
287 }
288 // Re-get the listener since the will paint notification may have killed it.
289 listener = GetPaintListener();
290 if (!listener) {
291 return false;
292 }
294 if (clientLayerManager && mCompositorParent && clientLayerManager->NeedsComposite()) {
295 mCompositorParent->ScheduleRenderOnCompositorThread();
296 clientLayerManager->SetNeedsComposite(false);
297 }
299 bool result = true;
300 if (!region.IsEmpty() && listener)
301 {
302 // Should probably pass in a real region here, using GetRandomRgn
303 // http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/clipping_4q0e.asp
305 #ifdef WIDGET_DEBUG_OUTPUT
306 debug_DumpPaintEvent(stdout,
307 this,
308 region,
309 nsAutoCString("noname"),
310 (int32_t) mWnd);
311 #endif // WIDGET_DEBUG_OUTPUT
313 switch (GetLayerManager()->GetBackendType()) {
314 case LayersBackend::LAYERS_BASIC:
315 {
316 nsRefPtr<gfxASurface> targetSurface;
318 #if defined(MOZ_XUL)
319 // don't support transparency for non-GDI rendering, for now
320 if ((IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
321 IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D)) &&
322 eTransparencyTransparent == mTransparencyMode) {
323 if (mTransparentSurface == nullptr)
324 SetupTranslucentWindowMemoryBitmap(mTransparencyMode);
325 targetSurface = mTransparentSurface;
326 }
327 #endif
329 nsRefPtr<gfxWindowsSurface> targetSurfaceWin;
330 if (!targetSurface &&
331 (IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
332 IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D)))
333 {
334 uint32_t flags = (mTransparencyMode == eTransparencyOpaque) ? 0 :
335 gfxWindowsSurface::FLAG_IS_TRANSPARENT;
336 targetSurfaceWin = new gfxWindowsSurface(hDC, flags);
337 targetSurface = targetSurfaceWin;
338 }
340 nsRefPtr<gfxImageSurface> targetSurfaceImage;
341 if (!targetSurface &&
342 (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH32) ||
343 IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24)))
344 {
345 gfxIntSize surfaceSize(ps.rcPaint.right - ps.rcPaint.left,
346 ps.rcPaint.bottom - ps.rcPaint.top);
348 if (!EnsureSharedSurfaceSize(surfaceSize)) {
349 NS_ERROR("Couldn't allocate a shared image surface!");
350 return false;
351 }
353 // don't use the shared surface directly; instead, create a new one
354 // that just reuses its buffer.
355 targetSurfaceImage = new gfxImageSurface(sSharedSurfaceData.get(),
356 surfaceSize,
357 surfaceSize.width * 4,
358 gfxImageFormat::RGB24);
360 if (targetSurfaceImage && !targetSurfaceImage->CairoStatus()) {
361 targetSurfaceImage->SetDeviceOffset(gfxPoint(-ps.rcPaint.left, -ps.rcPaint.top));
362 targetSurface = targetSurfaceImage;
363 }
364 }
366 if (!targetSurface) {
367 NS_ERROR("Invalid RenderMode!");
368 return false;
369 }
371 nsRefPtr<gfxContext> thebesContext;
372 if (gfxPlatform::GetPlatform()->SupportsAzureContentForType(mozilla::gfx::BackendType::CAIRO)) {
373 RECT paintRect;
374 ::GetClientRect(mWnd, &paintRect);
375 RefPtr<mozilla::gfx::DrawTarget> dt =
376 gfxPlatform::GetPlatform()->CreateDrawTargetForSurface(targetSurface,
377 mozilla::gfx::IntSize(paintRect.right - paintRect.left,
378 paintRect.bottom - paintRect.top));
379 thebesContext = new gfxContext(dt);
380 } else {
381 thebesContext = new gfxContext(targetSurface);
382 }
384 // don't need to double buffer with anything but GDI
385 BufferMode doubleBuffering = mozilla::layers::BufferMode::BUFFER_NONE;
386 if (IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
387 IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D)) {
388 #ifdef MOZ_XUL
389 switch (mTransparencyMode) {
390 case eTransparencyGlass:
391 case eTransparencyBorderlessGlass:
392 default:
393 // If we're not doing translucency, then double buffer
394 doubleBuffering = mozilla::layers::BufferMode::BUFFERED;
395 break;
396 case eTransparencyTransparent:
397 // If we're rendering with translucency, we're going to be
398 // rendering the whole window; make sure we clear it first
399 thebesContext->SetOperator(gfxContext::OPERATOR_CLEAR);
400 thebesContext->Paint();
401 thebesContext->SetOperator(gfxContext::OPERATOR_OVER);
402 break;
403 }
404 #else
405 doubleBuffering = mozilla::layers::BufferMode::BUFFERED;
406 #endif
407 }
409 {
410 AutoLayerManagerSetup
411 setupLayerManager(this, thebesContext, doubleBuffering);
412 result = listener->PaintWindow(this, region);
413 }
415 #ifdef MOZ_XUL
416 if ((IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
417 IsRenderMode(gfxWindowsPlatform::RENDER_DIRECT2D))&&
418 eTransparencyTransparent == mTransparencyMode) {
419 // Data from offscreen drawing surface was copied to memory bitmap of transparent
420 // bitmap. Now it can be read from memory bitmap to apply alpha channel and after
421 // that displayed on the screen.
422 UpdateTranslucentWindow();
423 } else
424 #endif
426 if (result) {
427 if (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24) ||
428 IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH32))
429 {
430 gfxIntSize surfaceSize = targetSurfaceImage->GetSize();
432 // Just blit this directly
433 BITMAPINFOHEADER bi;
434 memset(&bi, 0, sizeof(BITMAPINFOHEADER));
435 bi.biSize = sizeof(BITMAPINFOHEADER);
436 bi.biWidth = surfaceSize.width;
437 bi.biHeight = - surfaceSize.height;
438 bi.biPlanes = 1;
439 bi.biBitCount = 32;
440 bi.biCompression = BI_RGB;
442 if (IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24)) {
443 // On Windows CE/Windows Mobile, 24bpp packed-pixel sources
444 // seem to be far faster to blit than 32bpp (see bug 484864).
445 // So, convert the bits to 24bpp by stripping out the unused
446 // alpha byte. 24bpp DIBs also have scanlines that are 4-byte
447 // aligned though, so that must be taken into account.
448 int srcstride = surfaceSize.width*4;
449 int dststride = surfaceSize.width*3;
450 dststride = (dststride + 3) & ~3;
452 // Convert in place
453 for (int j = 0; j < surfaceSize.height; ++j) {
454 unsigned int *src = (unsigned int*) (targetSurfaceImage->Data() + j*srcstride);
455 unsigned int *dst = (unsigned int*) (targetSurfaceImage->Data() + j*dststride);
457 // go 4 pixels at a time, since each 4 pixels
458 // turns into 3 DWORDs when converted into BGR:
459 // BGRx BGRx BGRx BGRx -> BGRB GRBG RBGR
460 //
461 // However, since we're dealing with little-endian ints, this is actually:
462 // xRGB xrgb xRGB xrgb -> bRGB GBrg rgbR
463 int width_left = surfaceSize.width;
464 while (width_left >= 4) {
465 unsigned int a = *src++;
466 unsigned int b = *src++;
467 unsigned int c = *src++;
468 unsigned int d = *src++;
470 *dst++ = (a & 0x00ffffff) | (b << 24);
471 *dst++ = ((b & 0x00ffff00) >> 8) | (c << 16);
472 *dst++ = ((c & 0x00ff0000) >> 16) | (d << 8);
474 width_left -= 4;
475 }
477 // then finish up whatever number of pixels are left,
478 // using bytes.
479 unsigned char *bsrc = (unsigned char*) src;
480 unsigned char *bdst = (unsigned char*) dst;
481 switch (width_left) {
482 case 3:
483 *bdst++ = *bsrc++;
484 *bdst++ = *bsrc++;
485 *bdst++ = *bsrc++;
486 bsrc++;
487 case 2:
488 *bdst++ = *bsrc++;
489 *bdst++ = *bsrc++;
490 *bdst++ = *bsrc++;
491 bsrc++;
492 case 1:
493 *bdst++ = *bsrc++;
494 *bdst++ = *bsrc++;
495 *bdst++ = *bsrc++;
496 bsrc++;
497 case 0:
498 break;
499 }
500 }
502 bi.biBitCount = 24;
503 }
505 StretchDIBits(hDC,
506 ps.rcPaint.left, ps.rcPaint.top,
507 surfaceSize.width, surfaceSize.height,
508 0, 0,
509 surfaceSize.width, surfaceSize.height,
510 targetSurfaceImage->Data(),
511 (BITMAPINFO*) &bi,
512 DIB_RGB_COLORS,
513 SRCCOPY);
514 }
515 }
516 }
517 break;
518 #ifdef MOZ_ENABLE_D3D9_LAYER
519 case LayersBackend::LAYERS_D3D9:
520 {
521 nsRefPtr<LayerManagerD3D9> layerManagerD3D9 =
522 static_cast<mozilla::layers::LayerManagerD3D9*>(GetLayerManager());
523 layerManagerD3D9->SetClippingRegion(region);
524 result = listener->PaintWindow(this, region);
525 if (layerManagerD3D9->DeviceWasRemoved()) {
526 mLayerManager->Destroy();
527 mLayerManager = nullptr;
528 // When our device was removed, we should have gfxWindowsPlatform
529 // check if its render mode is up to date!
530 gfxWindowsPlatform::GetPlatform()->UpdateRenderMode();
531 Invalidate();
532 }
533 }
534 break;
535 #endif
536 #ifdef MOZ_ENABLE_D3D10_LAYER
537 case LayersBackend::LAYERS_D3D10:
538 {
539 gfxWindowsPlatform::GetPlatform()->UpdateRenderMode();
540 LayerManagerD3D10 *layerManagerD3D10 = static_cast<mozilla::layers::LayerManagerD3D10*>(GetLayerManager());
541 if (layerManagerD3D10->device() != gfxWindowsPlatform::GetPlatform()->GetD3D10Device()) {
542 Invalidate();
543 } else {
544 result = listener->PaintWindow(this, region);
545 }
546 }
547 break;
548 #endif
549 case LayersBackend::LAYERS_CLIENT:
550 result = listener->PaintWindow(this, region);
551 break;
552 default:
553 NS_ERROR("Unknown layers backend used!");
554 break;
555 }
556 }
558 if (!aDC) {
559 ::EndPaint(mWnd, &ps);
560 }
562 mPaintDC = nullptr;
563 mLastPaintEndTime = TimeStamp::Now();
565 #if defined(WIDGET_DEBUG_OUTPUT)
566 if (debug_WantPaintFlashing())
567 {
568 // Only flash paint events which have not ignored the paint message.
569 // Those that ignore the paint message aren't painting anything so there
570 // is only the overhead of the dispatching the paint event.
571 if (result) {
572 ::InvertRgn(debugPaintFlashDC, debugPaintFlashRegion);
573 PR_Sleep(PR_MillisecondsToInterval(30));
574 ::InvertRgn(debugPaintFlashDC, debugPaintFlashRegion);
575 PR_Sleep(PR_MillisecondsToInterval(30));
576 }
577 ::ReleaseDC(mWnd, debugPaintFlashDC);
578 ::DeleteObject(debugPaintFlashRegion);
579 }
580 #endif // WIDGET_DEBUG_OUTPUT
582 mPainting = false;
584 // Re-get the listener since painting may have killed it.
585 listener = GetPaintListener();
586 if (listener)
587 listener->DidPaintWindow();
589 if (aNestingLevel == 0 && ::GetUpdateRect(mWnd, nullptr, false)) {
590 OnPaint(aDC, 1);
591 }
593 return result;
594 }
596 gfxIntSize nsWindowGfx::GetIconMetrics(IconSizeType aSizeType) {
597 int32_t width = ::GetSystemMetrics(sIconMetrics[aSizeType].xMetric);
598 int32_t height = ::GetSystemMetrics(sIconMetrics[aSizeType].yMetric);
600 if (width == 0 || height == 0) {
601 width = height = sIconMetrics[aSizeType].defaultSize;
602 }
604 return gfxIntSize(width, height);
605 }
607 nsresult nsWindowGfx::CreateIcon(imgIContainer *aContainer,
608 bool aIsCursor,
609 uint32_t aHotspotX,
610 uint32_t aHotspotY,
611 gfxIntSize aScaledSize,
612 HICON *aIcon) {
614 MOZ_ASSERT((aScaledSize.width > 0 && aScaledSize.height > 0) ||
615 (aScaledSize.width == 0 && aScaledSize.height == 0));
617 // Get the image data
618 RefPtr<SourceSurface> surface =
619 aContainer->GetFrame(imgIContainer::FRAME_CURRENT,
620 imgIContainer::FLAG_SYNC_DECODE);
621 NS_ENSURE_TRUE(surface, NS_ERROR_NOT_AVAILABLE);
623 IntSize frameSize = surface->GetSize();
624 if (frameSize.IsEmpty()) {
625 return NS_ERROR_FAILURE;
626 }
628 IntSize iconSize(aScaledSize.width, aScaledSize.height);
629 if (iconSize == IntSize(0, 0)) { // use frame's intrinsic size
630 iconSize = frameSize;
631 }
633 RefPtr<DataSourceSurface> dataSurface;
634 bool mappedOK;
635 DataSourceSurface::MappedSurface map;
637 if (iconSize != frameSize) {
638 // Scale the surface
639 dataSurface = Factory::CreateDataSourceSurface(iconSize,
640 SurfaceFormat::B8G8R8A8);
641 NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE);
642 mappedOK = dataSurface->Map(DataSourceSurface::MapType::READ_WRITE, &map);
643 NS_ENSURE_TRUE(mappedOK, NS_ERROR_FAILURE);
645 RefPtr<DrawTarget> dt =
646 Factory::CreateDrawTargetForData(BackendType::CAIRO,
647 map.mData,
648 dataSurface->GetSize(),
649 map.mStride,
650 SurfaceFormat::B8G8R8A8);
651 dt->DrawSurface(surface,
652 Rect(0, 0, iconSize.width, iconSize.height),
653 Rect(0, 0, frameSize.width, frameSize.height),
654 DrawSurfaceOptions(),
655 DrawOptions(1.0f, CompositionOp::OP_SOURCE));
656 } else if (surface->GetFormat() != SurfaceFormat::B8G8R8A8) {
657 // Convert format to SurfaceFormat::B8G8R8A8
658 dataSurface = gfxUtils::
659 CopySurfaceToDataSourceSurfaceWithFormat(surface,
660 SurfaceFormat::B8G8R8A8);
661 NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE);
662 mappedOK = dataSurface->Map(DataSourceSurface::MapType::READ, &map);
663 } else {
664 dataSurface = surface->GetDataSurface();
665 NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE);
666 mappedOK = dataSurface->Map(DataSourceSurface::MapType::READ, &map);
667 }
668 NS_ENSURE_TRUE(dataSurface && mappedOK, NS_ERROR_FAILURE);
669 MOZ_ASSERT(dataSurface->GetFormat() == SurfaceFormat::B8G8R8A8);
671 uint8_t* data = nullptr;
672 nsAutoArrayPtr<uint8_t> autoDeleteArray;
673 if (map.mStride == BytesPerPixel(dataSurface->GetFormat()) * iconSize.width) {
674 // Mapped data is already packed
675 data = map.mData;
676 } else {
677 // We can't use map.mData since the pixels are not packed (as required by
678 // CreateDIBitmap, which is called under the DataToBitmap call below).
679 //
680 // We must unmap before calling SurfaceToPackedBGRA because it needs access
681 // to the pixel data.
682 dataSurface->Unmap();
683 map.mData = nullptr;
685 data = autoDeleteArray = SurfaceToPackedBGRA(dataSurface);
686 NS_ENSURE_TRUE(data, NS_ERROR_FAILURE);
687 }
689 HBITMAP bmp = DataToBitmap(data, iconSize.width, -iconSize.height, 32);
690 uint8_t* a1data = Data32BitTo1Bit(data, iconSize.width, iconSize.height);
691 if (map.mData) {
692 dataSurface->Unmap();
693 }
694 if (!a1data) {
695 return NS_ERROR_FAILURE;
696 }
698 HBITMAP mbmp = DataToBitmap(a1data, iconSize.width, -iconSize.height, 1);
699 PR_Free(a1data);
701 ICONINFO info = {0};
702 info.fIcon = !aIsCursor;
703 info.xHotspot = aHotspotX;
704 info.yHotspot = aHotspotY;
705 info.hbmMask = mbmp;
706 info.hbmColor = bmp;
708 HCURSOR icon = ::CreateIconIndirect(&info);
709 ::DeleteObject(mbmp);
710 ::DeleteObject(bmp);
711 if (!icon)
712 return NS_ERROR_FAILURE;
713 *aIcon = icon;
714 return NS_OK;
715 }
717 // Adjust cursor image data
718 uint8_t* nsWindowGfx::Data32BitTo1Bit(uint8_t* aImageData,
719 uint32_t aWidth, uint32_t aHeight)
720 {
721 // We need (aWidth + 7) / 8 bytes plus zero-padding up to a multiple of
722 // 4 bytes for each row (HBITMAP requirement). Bug 353553.
723 uint32_t outBpr = ((aWidth + 31) / 8) & ~3;
725 // Allocate and clear mask buffer
726 uint8_t* outData = (uint8_t*)PR_Calloc(outBpr, aHeight);
727 if (!outData)
728 return nullptr;
730 int32_t *imageRow = (int32_t*)aImageData;
731 for (uint32_t curRow = 0; curRow < aHeight; curRow++) {
732 uint8_t *outRow = outData + curRow * outBpr;
733 uint8_t mask = 0x80;
734 for (uint32_t curCol = 0; curCol < aWidth; curCol++) {
735 // Use sign bit to test for transparency, as alpha byte is highest byte
736 if (*imageRow++ < 0)
737 *outRow |= mask;
739 mask >>= 1;
740 if (!mask) {
741 outRow ++;
742 mask = 0x80;
743 }
744 }
745 }
747 return outData;
748 }
750 /**
751 * Convert the given image data to a HBITMAP. If the requested depth is
752 * 32 bit, a bitmap with an alpha channel will be returned.
753 *
754 * @param aImageData The image data to convert. Must use the format accepted
755 * by CreateDIBitmap.
756 * @param aWidth With of the bitmap, in pixels.
757 * @param aHeight Height of the image, in pixels.
758 * @param aDepth Image depth, in bits. Should be one of 1, 24 and 32.
759 *
760 * @return The HBITMAP representing the image. Caller should call
761 * DeleteObject when done with the bitmap.
762 * On failure, nullptr will be returned.
763 */
764 HBITMAP nsWindowGfx::DataToBitmap(uint8_t* aImageData,
765 uint32_t aWidth,
766 uint32_t aHeight,
767 uint32_t aDepth)
768 {
769 HDC dc = ::GetDC(nullptr);
771 if (aDepth == 32) {
772 // Alpha channel. We need the new header.
773 BITMAPV4HEADER head = { 0 };
774 head.bV4Size = sizeof(head);
775 head.bV4Width = aWidth;
776 head.bV4Height = aHeight;
777 head.bV4Planes = 1;
778 head.bV4BitCount = aDepth;
779 head.bV4V4Compression = BI_BITFIELDS;
780 head.bV4SizeImage = 0; // Uncompressed
781 head.bV4XPelsPerMeter = 0;
782 head.bV4YPelsPerMeter = 0;
783 head.bV4ClrUsed = 0;
784 head.bV4ClrImportant = 0;
786 head.bV4RedMask = 0x00FF0000;
787 head.bV4GreenMask = 0x0000FF00;
788 head.bV4BlueMask = 0x000000FF;
789 head.bV4AlphaMask = 0xFF000000;
791 HBITMAP bmp = ::CreateDIBitmap(dc,
792 reinterpret_cast<CONST BITMAPINFOHEADER*>(&head),
793 CBM_INIT,
794 aImageData,
795 reinterpret_cast<CONST BITMAPINFO*>(&head),
796 DIB_RGB_COLORS);
797 ::ReleaseDC(nullptr, dc);
798 return bmp;
799 }
801 char reserved_space[sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 2];
802 BITMAPINFOHEADER& head = *(BITMAPINFOHEADER*)reserved_space;
804 head.biSize = sizeof(BITMAPINFOHEADER);
805 head.biWidth = aWidth;
806 head.biHeight = aHeight;
807 head.biPlanes = 1;
808 head.biBitCount = (WORD)aDepth;
809 head.biCompression = BI_RGB;
810 head.biSizeImage = 0; // Uncompressed
811 head.biXPelsPerMeter = 0;
812 head.biYPelsPerMeter = 0;
813 head.biClrUsed = 0;
814 head.biClrImportant = 0;
816 BITMAPINFO& bi = *(BITMAPINFO*)reserved_space;
818 if (aDepth == 1) {
819 RGBQUAD black = { 0, 0, 0, 0 };
820 RGBQUAD white = { 255, 255, 255, 0 };
822 bi.bmiColors[0] = white;
823 bi.bmiColors[1] = black;
824 }
826 HBITMAP bmp = ::CreateDIBitmap(dc, &head, CBM_INIT, aImageData, &bi, DIB_RGB_COLORS);
827 ::ReleaseDC(nullptr, dc);
828 return bmp;
829 }
