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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include <windows.h> | |
| 6 #include <psapi.h> | |
| 7 | |
| 8 #include "base/debug/gdi_debug_util_win.h" | |
| 9 #include "base/logging.h" | |
| 10 #include "skia/ext/bitmap_platform_device_win.h" | |
| 11 #include "skia/ext/platform_canvas.h" | |
| 12 #include "third_party/skia/include/core/SkMatrix.h" | |
| 13 #include "third_party/skia/include/core/SkRefCnt.h" | |
| 14 #include "third_party/skia/include/core/SkRegion.h" | |
| 15 #include "third_party/skia/include/core/SkUtils.h" | |
| 16 | |
| 17 namespace { | |
| 18 | |
| 19 HBITMAP CreateHBitmap(int width, int height, bool is_opaque, | |
| 20 HANDLE shared_section, void** data) { | |
| 21 // CreateDIBSection appears to get unhappy if we create an empty bitmap, so | |
| 22 // just create a minimal bitmap | |
| 23 if ((width == 0) || (height == 0)) { | |
| 24 width = 1; | |
| 25 height = 1; | |
| 26 } | |
| 27 | |
| 28 BITMAPINFOHEADER hdr = {0}; | |
| 29 hdr.biSize = sizeof(BITMAPINFOHEADER); | |
| 30 hdr.biWidth = width; | |
| 31 hdr.biHeight = -height; // minus means top-down bitmap | |
| 32 hdr.biPlanes = 1; | |
| 33 hdr.biBitCount = 32; | |
| 34 hdr.biCompression = BI_RGB; // no compression | |
| 35 hdr.biSizeImage = 0; | |
| 36 hdr.biXPelsPerMeter = 1; | |
| 37 hdr.biYPelsPerMeter = 1; | |
| 38 hdr.biClrUsed = 0; | |
| 39 hdr.biClrImportant = 0; | |
| 40 | |
| 41 HBITMAP hbitmap = CreateDIBSection(NULL, reinterpret_cast<BITMAPINFO*>(&hdr), | |
| 42 0, data, shared_section, 0); | |
| 43 | |
| 44 #if !defined(_WIN64) | |
| 45 // If this call fails, we're gonna crash hard. Try to get some useful | |
| 46 // information out before we crash for post-mortem analysis. | |
| 47 if (!hbitmap) | |
| 48 base::debug::GDIBitmapAllocFailure(&hdr, shared_section); | |
| 49 #endif | |
| 50 | |
| 51 return hbitmap; | |
| 52 } | |
| 53 | |
| 54 } // namespace | |
| 55 | |
| 56 namespace skia { | |
| 57 | |
| 58 void DrawToNativeContext(SkCanvas* canvas, HDC hdc, int x, int y, | |
| 59 const RECT* src_rect) { | |
| 60 PlatformDevice* platform_device = GetPlatformDevice(GetTopDevice(*canvas)); | |
| 61 if (platform_device) | |
| 62 platform_device->DrawToHDC(hdc, x, y, src_rect); | |
| 63 } | |
| 64 | |
| 65 void PlatformDevice::DrawToHDC(HDC, int x, int y, const RECT* src_rect) {} | |
| 66 | |
| 67 HDC BitmapPlatformDevice::GetBitmapDC() { | |
| 68 if (!hdc_) { | |
| 69 hdc_ = CreateCompatibleDC(NULL); | |
| 70 InitializeDC(hdc_); | |
| 71 old_hbitmap_ = static_cast<HBITMAP>(SelectObject(hdc_, hbitmap_)); | |
| 72 } | |
| 73 | |
| 74 LoadConfig(); | |
| 75 return hdc_; | |
| 76 } | |
| 77 | |
| 78 void BitmapPlatformDevice::ReleaseBitmapDC() { | |
| 79 SkASSERT(hdc_); | |
| 80 SelectObject(hdc_, old_hbitmap_); | |
| 81 DeleteDC(hdc_); | |
| 82 hdc_ = NULL; | |
| 83 old_hbitmap_ = NULL; | |
| 84 } | |
| 85 | |
| 86 bool BitmapPlatformDevice::IsBitmapDCCreated() | |
| 87 const { | |
| 88 return hdc_ != NULL; | |
| 89 } | |
| 90 | |
| 91 | |
| 92 void BitmapPlatformDevice::SetMatrixClip( | |
| 93 const SkMatrix& transform, | |
| 94 const SkRegion& region) { | |
| 95 transform_ = transform; | |
| 96 clip_region_ = region; | |
| 97 config_dirty_ = true; | |
| 98 } | |
| 99 | |
| 100 void BitmapPlatformDevice::LoadConfig() { | |
| 101 if (!config_dirty_ || !hdc_) | |
| 102 return; // Nothing to do. | |
| 103 config_dirty_ = false; | |
| 104 | |
| 105 // Transform. | |
| 106 LoadTransformToDC(hdc_, transform_); | |
| 107 LoadClippingRegionToDC(hdc_, clip_region_, transform_); | |
| 108 } | |
| 109 | |
| 110 static void DeleteHBitmapCallback(void* addr, void* context) { | |
| 111 DeleteObject(static_cast<HBITMAP>(context)); | |
| 112 } | |
| 113 | |
| 114 static bool InstallHBitmapPixels(SkBitmap* bitmap, int width, int height, | |
| 115 bool is_opaque, void* data, HBITMAP hbitmap) { | |
| 116 const SkAlphaType at = is_opaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType; | |
| 117 const SkImageInfo info = SkImageInfo::MakeN32(width, height, at); | |
| 118 const size_t rowBytes = info.minRowBytes(); | |
| 119 SkColorTable* color_table = NULL; | |
| 120 return bitmap->installPixels(info, data, rowBytes, color_table, | |
| 121 DeleteHBitmapCallback, hbitmap); | |
| 122 } | |
| 123 | |
| 124 // We use this static factory function instead of the regular constructor so | |
| 125 // that we can create the pixel data before calling the constructor. This is | |
| 126 // required so that we can call the base class' constructor with the pixel | |
| 127 // data. | |
| 128 BitmapPlatformDevice* BitmapPlatformDevice::Create( | |
| 129 int width, | |
| 130 int height, | |
| 131 bool is_opaque, | |
| 132 HANDLE shared_section, | |
| 133 bool do_clear) { | |
| 134 | |
| 135 void* data; | |
| 136 HBITMAP hbitmap = CreateHBitmap(width, height, is_opaque, shared_section, | |
| 137 &data); | |
| 138 if (!hbitmap) | |
| 139 return NULL; | |
| 140 | |
| 141 SkBitmap bitmap; | |
| 142 if (!InstallHBitmapPixels(&bitmap, width, height, is_opaque, data, hbitmap)) | |
| 143 return NULL; | |
| 144 | |
| 145 if (do_clear) | |
| 146 bitmap.eraseColor(0); | |
| 147 | |
| 148 #ifndef NDEBUG | |
| 149 // If we were given data, then don't clobber it! | |
| 150 if (!shared_section && is_opaque) | |
| 151 // To aid in finding bugs, we set the background color to something | |
| 152 // obviously wrong so it will be noticable when it is not cleared | |
| 153 bitmap.eraseARGB(255, 0, 255, 128); // bright bluish green | |
| 154 #endif | |
| 155 | |
| 156 // The device object will take ownership of the HBITMAP. The initial refcount | |
| 157 // of the data object will be 1, which is what the constructor expects. | |
| 158 return new BitmapPlatformDevice(hbitmap, bitmap); | |
| 159 } | |
| 160 | |
| 161 // static | |
| 162 BitmapPlatformDevice* BitmapPlatformDevice::Create(int width, int height, | |
| 163 bool is_opaque) { | |
| 164 const HANDLE shared_section = NULL; | |
| 165 const bool do_clear = false; | |
| 166 return Create(width, height, is_opaque, shared_section, do_clear); | |
| 167 } | |
| 168 | |
| 169 // The device will own the HBITMAP, which corresponds to also owning the pixel | |
| 170 // data. Therefore, we do not transfer ownership to the SkBitmapDevice's bitmap. | |
| 171 BitmapPlatformDevice::BitmapPlatformDevice( | |
| 172 HBITMAP hbitmap, | |
| 173 const SkBitmap& bitmap) | |
| 174 : SkBitmapDevice(bitmap), | |
| 175 hbitmap_(hbitmap), | |
| 176 old_hbitmap_(NULL), | |
| 177 hdc_(NULL), | |
| 178 config_dirty_(true), // Want to load the config next time. | |
| 179 transform_(SkMatrix::I()) { | |
| 180 // The data object is already ref'ed for us by create(). | |
| 181 SkDEBUGCODE(begin_paint_count_ = 0); | |
| 182 SetPlatformDevice(this, this); | |
| 183 // Initialize the clip region to the entire bitmap. | |
| 184 BITMAP bitmap_data; | |
| 185 if (GetObject(hbitmap_, sizeof(BITMAP), &bitmap_data)) { | |
| 186 SkIRect rect; | |
| 187 rect.set(0, 0, bitmap_data.bmWidth, bitmap_data.bmHeight); | |
| 188 clip_region_ = SkRegion(rect); | |
| 189 } | |
| 190 } | |
| 191 | |
| 192 BitmapPlatformDevice::~BitmapPlatformDevice() { | |
| 193 SkASSERT(begin_paint_count_ == 0); | |
| 194 if (hdc_) | |
| 195 ReleaseBitmapDC(); | |
| 196 } | |
| 197 | |
| 198 HDC BitmapPlatformDevice::BeginPlatformPaint() { | |
| 199 SkDEBUGCODE(begin_paint_count_++); | |
| 200 return GetBitmapDC(); | |
| 201 } | |
| 202 | |
| 203 void BitmapPlatformDevice::EndPlatformPaint() { | |
| 204 SkASSERT(begin_paint_count_--); | |
| 205 PlatformDevice::EndPlatformPaint(); | |
| 206 } | |
| 207 | |
| 208 void BitmapPlatformDevice::setMatrixClip(const SkMatrix& transform, | |
| 209 const SkRegion& region, | |
| 210 const SkClipStack&) { | |
| 211 SetMatrixClip(transform, region); | |
| 212 } | |
| 213 | |
| 214 void BitmapPlatformDevice::DrawToHDC(HDC dc, int x, int y, | |
| 215 const RECT* src_rect) { | |
| 216 bool created_dc = !IsBitmapDCCreated(); | |
| 217 HDC source_dc = BeginPlatformPaint(); | |
| 218 | |
| 219 RECT temp_rect; | |
| 220 if (!src_rect) { | |
| 221 temp_rect.left = 0; | |
| 222 temp_rect.right = width(); | |
| 223 temp_rect.top = 0; | |
| 224 temp_rect.bottom = height(); | |
| 225 src_rect = &temp_rect; | |
| 226 } | |
| 227 | |
| 228 int copy_width = src_rect->right - src_rect->left; | |
| 229 int copy_height = src_rect->bottom - src_rect->top; | |
| 230 | |
| 231 // We need to reset the translation for our bitmap or (0,0) won't be in the | |
| 232 // upper left anymore | |
| 233 SkMatrix identity; | |
| 234 identity.reset(); | |
| 235 | |
| 236 LoadTransformToDC(source_dc, identity); | |
| 237 if (isOpaque()) { | |
| 238 BitBlt(dc, | |
| 239 x, | |
| 240 y, | |
| 241 copy_width, | |
| 242 copy_height, | |
| 243 source_dc, | |
| 244 src_rect->left, | |
| 245 src_rect->top, | |
| 246 SRCCOPY); | |
| 247 } else { | |
| 248 SkASSERT(copy_width != 0 && copy_height != 0); | |
| 249 BLENDFUNCTION blend_function = {AC_SRC_OVER, 0, 255, AC_SRC_ALPHA}; | |
| 250 GdiAlphaBlend(dc, | |
| 251 x, | |
| 252 y, | |
| 253 copy_width, | |
| 254 copy_height, | |
| 255 source_dc, | |
| 256 src_rect->left, | |
| 257 src_rect->top, | |
| 258 copy_width, | |
| 259 copy_height, | |
| 260 blend_function); | |
| 261 } | |
| 262 LoadTransformToDC(source_dc, transform_); | |
| 263 | |
| 264 EndPlatformPaint(); | |
| 265 if (created_dc) | |
| 266 ReleaseBitmapDC(); | |
| 267 } | |
| 268 | |
| 269 const SkBitmap& BitmapPlatformDevice::onAccessBitmap() { | |
| 270 // FIXME(brettw) OPTIMIZATION: We should only flush if we know a GDI | |
| 271 // operation has occurred on our DC. | |
| 272 if (IsBitmapDCCreated()) | |
| 273 GdiFlush(); | |
| 274 return SkBitmapDevice::onAccessBitmap(); | |
| 275 } | |
| 276 | |
| 277 SkBaseDevice* BitmapPlatformDevice::onCreateDevice(const CreateInfo& cinfo, | |
| 278 const SkPaint*) { | |
| 279 const SkImageInfo& info = cinfo.fInfo; | |
| 280 const bool do_clear = !info.isOpaque(); | |
| 281 SkASSERT(info.colorType() == kN32_SkColorType); | |
| 282 return Create(info.width(), info.height(), info.isOpaque(), NULL, do_clear); | |
| 283 } | |
| 284 | |
| 285 // PlatformCanvas impl | |
| 286 | |
| 287 SkCanvas* CreatePlatformCanvas(int width, | |
| 288 int height, | |
| 289 bool is_opaque, | |
| 290 HANDLE shared_section, | |
| 291 OnFailureType failureType) { | |
| 292 skia::RefPtr<SkBaseDevice> dev = skia::AdoptRef( | |
| 293 BitmapPlatformDevice::Create(width, height, is_opaque, shared_section)); | |
| 294 return CreateCanvas(dev, failureType); | |
| 295 } | |
| 296 | |
| 297 // Port of PlatformBitmap to win | |
| 298 | |
| 299 PlatformBitmap::~PlatformBitmap() { | |
| 300 if (surface_) { | |
| 301 if (platform_extra_) | |
| 302 SelectObject(surface_, reinterpret_cast<HGDIOBJ>(platform_extra_)); | |
| 303 DeleteDC(surface_); | |
| 304 } | |
| 305 } | |
| 306 | |
| 307 bool PlatformBitmap::Allocate(int width, int height, bool is_opaque) { | |
| 308 void* data; | |
| 309 HBITMAP hbitmap = CreateHBitmap(width, height, is_opaque, 0, &data); | |
| 310 if (!hbitmap) | |
| 311 return false; | |
| 312 | |
| 313 surface_ = CreateCompatibleDC(NULL); | |
| 314 InitializeDC(surface_); | |
| 315 // When the memory DC is created, its display surface is exactly one | |
| 316 // monochrome pixel wide and one monochrome pixel high. Save this object | |
| 317 // off, we'll restore it just before deleting the memory DC. | |
| 318 HGDIOBJ stock_bitmap = SelectObject(surface_, hbitmap); | |
| 319 platform_extra_ = reinterpret_cast<intptr_t>(stock_bitmap); | |
| 320 | |
| 321 if (!InstallHBitmapPixels(&bitmap_, width, height, is_opaque, data, hbitmap)) | |
| 322 return false; | |
| 323 bitmap_.lockPixels(); | |
| 324 | |
| 325 return true; | |
| 326 } | |
| 327 | |
| 328 } // namespace skia | |
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Chromium Code Reviews
Issue 2011713003:
Roll skia to 8cc209111876b7c78b5ec577c9221d8ed5e21024 (Closed)
Base URL: git@github.com:domokit/mojo.git@master