2 * Copyright 2014 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #ifndef SkGatherPixelRefsAndRects_DEFINED
9 #define SkGatherPixelRefsAndRects_DEFINED
14 #include "SkPictureUtils.h"
15 #include "SkRasterClip.h"
20 // This GatherPixelRefs device passes all discovered pixel refs and their
21 // device bounds to the user provided SkPixelRefContainer-derived object
22 class SkGatherPixelRefsAndRectsDevice : public SkBaseDevice {
24 SK_DECLARE_INST_COUNT(SkGatherPixelRefsAndRectsDevice)
26 SkGatherPixelRefsAndRectsDevice(int width, int height,
27 SkPictureUtils::SkPixelRefContainer* prCont) {
28 fSize.set(width, height);
31 fEmptyBitmap.setInfo(SkImageInfo::MakeUnknown(width, height));
34 virtual ~SkGatherPixelRefsAndRectsDevice() {
38 virtual SkImageInfo imageInfo() const SK_OVERRIDE {
39 return fEmptyBitmap.info();
43 virtual void clear(SkColor color) SK_OVERRIDE {
46 virtual void drawPaint(const SkDraw& draw, const SkPaint& paint) SK_OVERRIDE {
49 if (GetBitmapFromPaint(paint, &bm)) {
50 SkRect clipRect = SkRect::Make(draw.fRC->getBounds());
51 fPRCont->add(bm.pixelRef(), clipRect);
54 virtual void drawPoints(const SkDraw& draw, SkCanvas::PointMode mode, size_t count,
55 const SkPoint points[], const SkPaint& paint) SK_OVERRIDE {
57 if (!GetBitmapFromPaint(paint, &bm)) {
65 SkPoint min = points[0];
66 SkPoint max = points[0];
67 for (size_t i = 1; i < count; ++i) {
68 const SkPoint& point = points[i];
70 min.set(SkMinScalar(min.x(), point.x()), SkMinScalar(min.y(), point.y()));
71 max.set(SkMaxScalar(max.x(), point.x()), SkMaxScalar(max.y(), point.y()));
74 SkRect bounds = SkRect::MakeLTRB(min.x(), min.y(), max.x()+1, max.y()+1);
76 this->drawRect(draw, bounds, paint);
78 virtual void drawRect(const SkDraw& draw, const SkRect& rect,
79 const SkPaint& paint) SK_OVERRIDE {
81 if (GetBitmapFromPaint(paint, &bm)) {
83 draw.fMatrix->mapRect(&mappedRect, rect);
84 SkRect clipRect = SkRect::Make(draw.fRC->getBounds());
85 mappedRect.intersect(clipRect);
86 fPRCont->add(bm.pixelRef(), mappedRect);
89 virtual void drawOval(const SkDraw& draw, const SkRect& rect,
90 const SkPaint& paint) SK_OVERRIDE {
91 this->drawRect(draw, rect, paint);
93 virtual void drawRRect(const SkDraw& draw, const SkRRect& rrect,
94 const SkPaint& paint) SK_OVERRIDE {
95 this->drawRect(draw, rrect.rect(), paint);
97 virtual void drawPath(const SkDraw& draw, const SkPath& path,
98 const SkPaint& paint, const SkMatrix* prePathMatrix,
99 bool pathIsMutable) SK_OVERRIDE {
101 if (!GetBitmapFromPaint(paint, &bm)) {
105 SkRect pathBounds = path.getBounds();
107 prePathMatrix->mapRect(&pathBounds);
110 this->drawRect(draw, pathBounds, paint);
112 virtual void drawBitmap(const SkDraw& draw, const SkBitmap& bitmap,
113 const SkMatrix& matrix, const SkPaint& paint) SK_OVERRIDE {
115 totMatrix.setConcat(*draw.fMatrix, matrix);
117 SkRect bitmapRect = SkRect::MakeWH(SkIntToScalar(bitmap.width()),
118 SkIntToScalar(bitmap.height()));
120 totMatrix.mapRect(&mappedRect, bitmapRect);
121 fPRCont->add(bitmap.pixelRef(), mappedRect);
123 SkBitmap paintBitmap;
124 if (GetBitmapFromPaint(paint, &paintBitmap)) {
125 fPRCont->add(paintBitmap.pixelRef(), mappedRect);
128 virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap,
129 int x, int y, const SkPaint& paint) SK_OVERRIDE {
130 // Sprites aren't affected by current matrix, so we can't reuse drawRect.
132 matrix.setTranslate(SkIntToScalar(x), SkIntToScalar(y));
134 SkRect bitmapRect = SkRect::MakeWH(SkIntToScalar(bitmap.width()),
135 SkIntToScalar(bitmap.height()));
137 matrix.mapRect(&mappedRect, bitmapRect);
138 fPRCont->add(bitmap.pixelRef(), mappedRect);
140 SkBitmap paintBitmap;
141 if (GetBitmapFromPaint(paint, &paintBitmap)) {
142 fPRCont->add(paintBitmap.pixelRef(), mappedRect);
145 virtual void drawBitmapRect(const SkDraw& draw, const SkBitmap& bitmap,
146 const SkRect* srcOrNull, const SkRect& dst,
147 const SkPaint& paint,
148 SkCanvas::DrawBitmapRectFlags flags) SK_OVERRIDE {
149 SkRect bitmapRect = SkRect::MakeWH(SkIntToScalar(bitmap.width()),
150 SkIntToScalar(bitmap.height()));
152 matrix.setRectToRect(bitmapRect, dst, SkMatrix::kFill_ScaleToFit);
153 this->drawBitmap(draw, bitmap, matrix, paint);
155 virtual void drawText(const SkDraw& draw, const void* text, size_t len,
156 SkScalar x, SkScalar y,
157 const SkPaint& paint) SK_OVERRIDE {
159 if (!GetBitmapFromPaint(paint, &bitmap)) {
163 // Math is borrowed from SkBBoxRecord
165 paint.measureText(text, len, &bounds);
166 SkPaint::FontMetrics metrics;
167 paint.getFontMetrics(&metrics);
169 if (paint.isVerticalText()) {
170 SkScalar h = bounds.fBottom - bounds.fTop;
171 if (paint.getTextAlign() == SkPaint::kCenter_Align) {
172 bounds.fTop -= h / 2;
173 bounds.fBottom -= h / 2;
175 bounds.fBottom += metrics.fBottom;
176 bounds.fTop += metrics.fTop;
178 SkScalar w = bounds.fRight - bounds.fLeft;
179 if (paint.getTextAlign() == SkPaint::kCenter_Align) {
180 bounds.fLeft -= w / 2;
181 bounds.fRight -= w / 2;
182 } else if (paint.getTextAlign() == SkPaint::kRight_Align) {
186 bounds.fTop = metrics.fTop;
187 bounds.fBottom = metrics.fBottom;
190 SkScalar pad = (metrics.fBottom - metrics.fTop) / 2;
192 bounds.fRight += pad;
195 this->drawRect(draw, bounds, paint);
197 virtual void drawPosText(const SkDraw& draw, const void* text, size_t len,
198 const SkScalar pos[], SkScalar constY,
199 int scalarsPerPos, const SkPaint& paint) SK_OVERRIDE {
201 if (!GetBitmapFromPaint(paint, &bitmap)) {
209 // Similar to SkDraw asserts.
210 SkASSERT(scalarsPerPos == 1 || scalarsPerPos == 2);
212 SkScalar y = scalarsPerPos == 1 ? constY : constY + pos[1];
218 for (size_t i = 1; i < len; ++i) {
219 SkScalar x = pos[i * scalarsPerPos];
221 if (2 == scalarsPerPos) {
222 y += pos[i * scalarsPerPos + 1];
225 min.set(SkMinScalar(x, min.x()), SkMinScalar(y, min.y()));
226 max.set(SkMaxScalar(x, max.x()), SkMaxScalar(y, max.y()));
229 SkRect bounds = SkRect::MakeLTRB(min.x(), min.y(), max.x(), max.y());
231 // Math is borrowed from SkBBoxRecord
232 SkPaint::FontMetrics metrics;
233 paint.getFontMetrics(&metrics);
235 bounds.fTop += metrics.fTop;
236 bounds.fBottom += metrics.fBottom;
238 SkScalar pad = (metrics.fTop - metrics.fBottom) / 2;
240 bounds.fRight += pad;
242 this->drawRect(draw, bounds, paint);
244 virtual void drawTextOnPath(const SkDraw& draw, const void* text, size_t len,
245 const SkPath& path, const SkMatrix* matrix,
246 const SkPaint& paint) SK_OVERRIDE {
248 if (!GetBitmapFromPaint(paint, &bitmap)) {
252 // Math is borrowed from SkBBoxRecord
253 SkRect bounds = path.getBounds();
254 SkPaint::FontMetrics metrics;
255 paint.getFontMetrics(&metrics);
257 SkScalar pad = metrics.fTop;
260 bounds.fRight -= pad;
262 bounds.fBottom -= pad;
264 this->drawRect(draw, bounds, paint);
266 virtual void drawVertices(const SkDraw& draw, SkCanvas::VertexMode, int vertexCount,
267 const SkPoint verts[], const SkPoint texs[],
268 const SkColor colors[], SkXfermode* xmode,
269 const uint16_t indices[], int indexCount,
270 const SkPaint& paint) SK_OVERRIDE {
271 this->drawPoints(draw, SkCanvas::kPolygon_PointMode, vertexCount, verts, paint);
273 virtual void drawDevice(const SkDraw&, SkBaseDevice*, int x, int y,
274 const SkPaint&) SK_OVERRIDE {
277 // TODO: allow this call to return failure, or move to SkBitmapDevice only.
278 virtual const SkBitmap& onAccessBitmap() SK_OVERRIDE {
281 virtual void lockPixels() SK_OVERRIDE { NothingToDo(); }
282 virtual void unlockPixels() SK_OVERRIDE { NothingToDo(); }
283 virtual bool allowImageFilter(const SkImageFilter*) SK_OVERRIDE { return false; }
284 virtual bool canHandleImageFilter(const SkImageFilter*) SK_OVERRIDE { return false; }
285 virtual bool filterImage(const SkImageFilter*, const SkBitmap&, const SkImageFilter::Context&,
286 SkBitmap* result, SkIPoint* offset) SK_OVERRIDE {
291 SkPictureUtils::SkPixelRefContainer* fPRCont;
294 SkBitmap fEmptyBitmap; // legacy -- need to remove
296 static bool GetBitmapFromPaint(const SkPaint &paint, SkBitmap* bitmap) {
297 SkShader* shader = paint.getShader();
299 if (SkShader::kNone_GradientType == shader->asAGradient(NULL)) {
300 return SkShader::kNone_BitmapType != shader->asABitmap(bitmap, NULL, NULL);
306 virtual void replaceBitmapBackendForRasterSurface(const SkBitmap&) SK_OVERRIDE {
310 virtual SkBaseDevice* onCreateDevice(const SkImageInfo& info, Usage usage) SK_OVERRIDE {
311 // we expect to only get called via savelayer, in which case it is fine.
312 SkASSERT(kSaveLayer_Usage == usage);
313 return SkNEW_ARGS(SkGatherPixelRefsAndRectsDevice,
314 (info.width(), info.height(), fPRCont));
317 static void NotSupported() {
318 SkDEBUGFAIL("this method should never be called");
321 static void NothingToDo() {}
323 typedef SkBaseDevice INHERITED;
326 #endif // SkGatherPixelRefsAndRects_DEFINED