Move Canvas
Change-Id: I83d557af30fc2d5c69d06eedc0f4d52ac41c4210
diff --git a/libs/hwui/SkiaCanvas.cpp b/libs/hwui/SkiaCanvas.cpp
new file mode 100644
index 0000000..7fdbf9a
--- /dev/null
+++ b/libs/hwui/SkiaCanvas.cpp
@@ -0,0 +1,711 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "Canvas.h"
+
+#include <SkCanvas.h>
+#include <SkClipStack.h>
+#include <SkDevice.h>
+#include <SkDeque.h>
+#include <SkDrawFilter.h>
+#include <SkGraphics.h>
+#include <SkPorterDuff.h>
+#include <SkShader.h>
+#include <SkTArray.h>
+#include <SkTemplates.h>
+
+namespace android {
+
+// Holds an SkCanvas reference plus additional native data.
+class SkiaCanvas : public Canvas {
+public:
+ explicit SkiaCanvas(SkBitmap* bitmap);
+
+ /**
+ * Create a new SkiaCanvas.
+ *
+ * @param canvas SkCanvas to handle calls made to this SkiaCanvas. Must
+ * not be NULL. This constructor will ref() the SkCanvas, and unref()
+ * it in its destructor.
+ */
+ explicit SkiaCanvas(SkCanvas* canvas) : mCanvas(canvas) {
+ SkASSERT(canvas);
+ canvas->ref();
+ }
+
+ virtual SkCanvas* getSkCanvas() {
+ return mCanvas.get();
+ }
+
+ virtual void setBitmap(SkBitmap* bitmap, bool copyState);
+
+ virtual bool isOpaque();
+ virtual int width();
+ virtual int height();
+
+ virtual int getSaveCount() const;
+ virtual int save(SkCanvas::SaveFlags flags);
+ virtual void restore();
+ virtual void restoreToCount(int saveCount);
+
+ virtual int saveLayer(float left, float top, float right, float bottom,
+ const SkPaint* paint, SkCanvas::SaveFlags flags);
+ virtual int saveLayerAlpha(float left, float top, float right, float bottom,
+ int alpha, SkCanvas::SaveFlags flags);
+
+ virtual void getMatrix(SkMatrix* outMatrix) const;
+ virtual void setMatrix(const SkMatrix& matrix);
+ virtual void concat(const SkMatrix& matrix);
+ virtual void rotate(float degrees);
+ virtual void scale(float sx, float sy);
+ virtual void skew(float sx, float sy);
+ virtual void translate(float dx, float dy);
+
+ virtual bool getClipBounds(SkRect* outRect) const;
+ virtual bool quickRejectRect(float left, float top, float right, float bottom) const;
+ virtual bool quickRejectPath(const SkPath& path) const;
+ virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op);
+ virtual bool clipPath(const SkPath* path, SkRegion::Op op);
+ virtual bool clipRegion(const SkRegion* region, SkRegion::Op op);
+
+ virtual SkDrawFilter* getDrawFilter();
+ virtual void setDrawFilter(SkDrawFilter* drawFilter);
+
+ virtual void drawColor(int color, SkXfermode::Mode mode);
+ virtual void drawPaint(const SkPaint& paint);
+
+ virtual void drawPoint(float x, float y, const SkPaint& paint);
+ virtual void drawPoints(const float* points, int count, const SkPaint& paint);
+ virtual void drawLine(float startX, float startY, float stopX, float stopY,
+ const SkPaint& paint);
+ virtual void drawLines(const float* points, int count, const SkPaint& paint);
+ virtual void drawRect(float left, float top, float right, float bottom, const SkPaint& paint);
+ virtual void drawRoundRect(float left, float top, float right, float bottom,
+ float rx, float ry, const SkPaint& paint);
+ virtual void drawCircle(float x, float y, float radius, const SkPaint& paint);
+ virtual void drawOval(float left, float top, float right, float bottom, const SkPaint& paint);
+ virtual void drawArc(float left, float top, float right, float bottom,
+ float startAngle, float sweepAngle, bool useCenter, const SkPaint& paint);
+ virtual void drawPath(const SkPath& path, const SkPaint& paint);
+ virtual void drawVertices(SkCanvas::VertexMode vertexMode, int vertexCount,
+ const float* verts, const float* tex, const int* colors,
+ const uint16_t* indices, int indexCount, const SkPaint& paint);
+
+ virtual void drawBitmap(const SkBitmap& bitmap, float left, float top, const SkPaint* paint);
+ virtual void drawBitmap(const SkBitmap& bitmap, const SkMatrix& matrix, const SkPaint* paint);
+ virtual void drawBitmap(const SkBitmap& bitmap, float srcLeft, float srcTop,
+ float srcRight, float srcBottom, float dstLeft, float dstTop,
+ float dstRight, float dstBottom, const SkPaint* paint);
+ virtual void drawBitmapMesh(const SkBitmap& bitmap, int meshWidth, int meshHeight,
+ const float* vertices, const int* colors, const SkPaint* paint);
+
+ virtual void drawText(const uint16_t* text, const float* positions, int count,
+ const SkPaint& paint, float x, float y,
+ float boundsLeft, float boundsTop, float boundsRight, float boundsBottom,
+ float totalAdvance);
+ virtual void drawPosText(const uint16_t* text, const float* positions, int count,
+ int posCount, const SkPaint& paint);
+ virtual void drawTextOnPath(const uint16_t* glyphs, int count, const SkPath& path,
+ float hOffset, float vOffset, const SkPaint& paint);
+
+ virtual bool drawTextAbsolutePos() const { return true; }
+
+private:
+ struct SaveRec {
+ int saveCount;
+ SkCanvas::SaveFlags saveFlags;
+ };
+
+ void recordPartialSave(SkCanvas::SaveFlags flags);
+ void saveClipsForFrame(SkTArray<SkClipStack::Element>& clips, int frameSaveCount);
+ void applyClips(const SkTArray<SkClipStack::Element>& clips);
+
+ void drawPoints(const float* points, int count, const SkPaint& paint,
+ SkCanvas::PointMode mode);
+ void drawTextDecorations(float x, float y, float length, const SkPaint& paint);
+
+ SkAutoTUnref<SkCanvas> mCanvas;
+ SkAutoTDelete<SkDeque> mSaveStack; // lazily allocated, tracks partial saves.
+};
+
+// Construct an SkCanvas from the bitmap.
+static SkCanvas* createCanvas(SkBitmap* bitmap) {
+ if (bitmap) {
+ return SkNEW_ARGS(SkCanvas, (*bitmap));
+ }
+
+ // Create an empty bitmap device to prevent callers from crashing
+ // if they attempt to draw into this canvas.
+ SkBitmap emptyBitmap;
+ return new SkCanvas(emptyBitmap);
+}
+
+Canvas* Canvas::create_canvas(SkBitmap* bitmap) {
+ return new SkiaCanvas(bitmap);
+}
+
+Canvas* Canvas::create_canvas(SkCanvas* skiaCanvas) {
+ return new SkiaCanvas(skiaCanvas);
+}
+
+SkiaCanvas::SkiaCanvas(SkBitmap* bitmap) {
+ mCanvas.reset(createCanvas(bitmap));
+}
+
+// ----------------------------------------------------------------------------
+// Canvas state operations: Replace Bitmap
+// ----------------------------------------------------------------------------
+
+class ClipCopier : public SkCanvas::ClipVisitor {
+public:
+ ClipCopier(SkCanvas* dstCanvas) : m_dstCanvas(dstCanvas) {}
+
+ virtual void clipRect(const SkRect& rect, SkRegion::Op op, bool antialias) {
+ m_dstCanvas->clipRect(rect, op, antialias);
+ }
+ virtual void clipRRect(const SkRRect& rrect, SkRegion::Op op, bool antialias) {
+ m_dstCanvas->clipRRect(rrect, op, antialias);
+ }
+ virtual void clipPath(const SkPath& path, SkRegion::Op op, bool antialias) {
+ m_dstCanvas->clipPath(path, op, antialias);
+ }
+
+private:
+ SkCanvas* m_dstCanvas;
+};
+
+void SkiaCanvas::setBitmap(SkBitmap* bitmap, bool copyState) {
+ SkCanvas* newCanvas = createCanvas(bitmap);
+ SkASSERT(newCanvas);
+
+ if (copyState) {
+ // Copy the canvas matrix & clip state.
+ newCanvas->setMatrix(mCanvas->getTotalMatrix());
+ if (NULL != mCanvas->getDevice() && NULL != newCanvas->getDevice()) {
+ ClipCopier copier(newCanvas);
+ mCanvas->replayClips(&copier);
+ }
+ }
+
+ // unrefs the existing canvas
+ mCanvas.reset(newCanvas);
+
+ // clean up the old save stack
+ mSaveStack.reset(NULL);
+}
+
+// ----------------------------------------------------------------------------
+// Canvas state operations
+// ----------------------------------------------------------------------------
+
+bool SkiaCanvas::isOpaque() {
+ return mCanvas->getDevice()->accessBitmap(false).isOpaque();
+}
+
+int SkiaCanvas::width() {
+ return mCanvas->getBaseLayerSize().width();
+}
+
+int SkiaCanvas::height() {
+ return mCanvas->getBaseLayerSize().height();
+}
+
+// ----------------------------------------------------------------------------
+// Canvas state operations: Save (layer)
+// ----------------------------------------------------------------------------
+
+int SkiaCanvas::getSaveCount() const {
+ return mCanvas->getSaveCount();
+}
+
+int SkiaCanvas::save(SkCanvas::SaveFlags flags) {
+ int count = mCanvas->save();
+ recordPartialSave(flags);
+ return count;
+}
+
+void SkiaCanvas::restore() {
+ const SaveRec* rec = (NULL == mSaveStack.get())
+ ? NULL
+ : static_cast<SaveRec*>(mSaveStack->back());
+ int currentSaveCount = mCanvas->getSaveCount() - 1;
+ SkASSERT(NULL == rec || currentSaveCount >= rec->saveCount);
+
+ if (NULL == rec || rec->saveCount != currentSaveCount) {
+ // Fast path - no record for this frame.
+ mCanvas->restore();
+ return;
+ }
+
+ bool preserveMatrix = !(rec->saveFlags & SkCanvas::kMatrix_SaveFlag);
+ bool preserveClip = !(rec->saveFlags & SkCanvas::kClip_SaveFlag);
+
+ SkMatrix savedMatrix;
+ if (preserveMatrix) {
+ savedMatrix = mCanvas->getTotalMatrix();
+ }
+
+ SkTArray<SkClipStack::Element> savedClips;
+ if (preserveClip) {
+ saveClipsForFrame(savedClips, currentSaveCount);
+ }
+
+ mCanvas->restore();
+
+ if (preserveMatrix) {
+ mCanvas->setMatrix(savedMatrix);
+ }
+
+ if (preserveClip && !savedClips.empty()) {
+ applyClips(savedClips);
+ }
+
+ mSaveStack->pop_back();
+}
+
+void SkiaCanvas::restoreToCount(int restoreCount) {
+ while (mCanvas->getSaveCount() > restoreCount) {
+ this->restore();
+ }
+}
+
+int SkiaCanvas::saveLayer(float left, float top, float right, float bottom,
+ const SkPaint* paint, SkCanvas::SaveFlags flags) {
+ SkRect bounds = SkRect::MakeLTRB(left, top, right, bottom);
+ int count = mCanvas->saveLayer(&bounds, paint, flags | SkCanvas::kMatrixClip_SaveFlag);
+ recordPartialSave(flags);
+ return count;
+}
+
+int SkiaCanvas::saveLayerAlpha(float left, float top, float right, float bottom,
+ int alpha, SkCanvas::SaveFlags flags) {
+ SkRect bounds = SkRect::MakeLTRB(left, top, right, bottom);
+ int count = mCanvas->saveLayerAlpha(&bounds, alpha, flags | SkCanvas::kMatrixClip_SaveFlag);
+ recordPartialSave(flags);
+ return count;
+}
+
+// ----------------------------------------------------------------------------
+// functions to emulate legacy SaveFlags (i.e. independent matrix/clip flags)
+// ----------------------------------------------------------------------------
+
+void SkiaCanvas::recordPartialSave(SkCanvas::SaveFlags flags) {
+ // A partial save is a save operation which doesn't capture the full canvas state.
+ // (either kMatrix_SaveFlags or kClip_SaveFlag is missing).
+
+ // Mask-out non canvas state bits.
+ flags = static_cast<SkCanvas::SaveFlags>(flags & SkCanvas::kMatrixClip_SaveFlag);
+
+ if (SkCanvas::kMatrixClip_SaveFlag == flags) {
+ // not a partial save.
+ return;
+ }
+
+ if (NULL == mSaveStack.get()) {
+ mSaveStack.reset(SkNEW_ARGS(SkDeque, (sizeof(struct SaveRec), 8)));
+ }
+
+ SaveRec* rec = static_cast<SaveRec*>(mSaveStack->push_back());
+ // Store the save counter in the SkClipStack domain.
+ // (0-based, equal to the number of save ops on the stack).
+ rec->saveCount = mCanvas->getSaveCount() - 1;
+ rec->saveFlags = flags;
+}
+
+void SkiaCanvas::saveClipsForFrame(SkTArray<SkClipStack::Element>& clips, int frameSaveCount) {
+ SkClipStack::Iter clipIterator(*mCanvas->getClipStack(),
+ SkClipStack::Iter::kTop_IterStart);
+ while (const SkClipStack::Element* elem = clipIterator.next()) {
+ if (elem->getSaveCount() < frameSaveCount) {
+ // done with the current frame.
+ break;
+ }
+ SkASSERT(elem->getSaveCount() == frameSaveCount);
+ clips.push_back(*elem);
+ }
+}
+
+void SkiaCanvas::applyClips(const SkTArray<SkClipStack::Element>& clips) {
+ ClipCopier clipCopier(mCanvas);
+
+ // The clip stack stores clips in device space.
+ SkMatrix origMatrix = mCanvas->getTotalMatrix();
+ mCanvas->resetMatrix();
+
+ // We pushed the clips in reverse order.
+ for (int i = clips.count() - 1; i >= 0; --i) {
+ clips[i].replay(&clipCopier);
+ }
+
+ mCanvas->setMatrix(origMatrix);
+}
+
+// ----------------------------------------------------------------------------
+// Canvas state operations: Matrix
+// ----------------------------------------------------------------------------
+
+void SkiaCanvas::getMatrix(SkMatrix* outMatrix) const {
+ *outMatrix = mCanvas->getTotalMatrix();
+}
+
+void SkiaCanvas::setMatrix(const SkMatrix& matrix) {
+ mCanvas->setMatrix(matrix);
+}
+
+void SkiaCanvas::concat(const SkMatrix& matrix) {
+ mCanvas->concat(matrix);
+}
+
+void SkiaCanvas::rotate(float degrees) {
+ mCanvas->rotate(degrees);
+}
+
+void SkiaCanvas::scale(float sx, float sy) {
+ mCanvas->scale(sx, sy);
+}
+
+void SkiaCanvas::skew(float sx, float sy) {
+ mCanvas->skew(sx, sy);
+}
+
+void SkiaCanvas::translate(float dx, float dy) {
+ mCanvas->translate(dx, dy);
+}
+
+// ----------------------------------------------------------------------------
+// Canvas state operations: Clips
+// ----------------------------------------------------------------------------
+
+// This function is a mirror of SkCanvas::getClipBounds except that it does
+// not outset the edge of the clip to account for anti-aliasing. There is
+// a skia bug to investigate pushing this logic into back into skia.
+// (see https://code.google.com/p/skia/issues/detail?id=1303)
+bool SkiaCanvas::getClipBounds(SkRect* outRect) const {
+ SkIRect ibounds;
+ if (!mCanvas->getClipDeviceBounds(&ibounds)) {
+ return false;
+ }
+
+ SkMatrix inverse;
+ // if we can't invert the CTM, we can't return local clip bounds
+ if (!mCanvas->getTotalMatrix().invert(&inverse)) {
+ if (outRect) {
+ outRect->setEmpty();
+ }
+ return false;
+ }
+
+ if (NULL != outRect) {
+ SkRect r = SkRect::Make(ibounds);
+ inverse.mapRect(outRect, r);
+ }
+ return true;
+}
+
+bool SkiaCanvas::quickRejectRect(float left, float top, float right, float bottom) const {
+ SkRect bounds = SkRect::MakeLTRB(left, top, right, bottom);
+ return mCanvas->quickReject(bounds);
+}
+
+bool SkiaCanvas::quickRejectPath(const SkPath& path) const {
+ return mCanvas->quickReject(path);
+}
+
+bool SkiaCanvas::clipRect(float left, float top, float right, float bottom, SkRegion::Op op) {
+ SkRect rect = SkRect::MakeLTRB(left, top, right, bottom);
+ mCanvas->clipRect(rect, op);
+ return mCanvas->isClipEmpty();
+}
+
+bool SkiaCanvas::clipPath(const SkPath* path, SkRegion::Op op) {
+ mCanvas->clipPath(*path, op);
+ return mCanvas->isClipEmpty();
+}
+
+bool SkiaCanvas::clipRegion(const SkRegion* region, SkRegion::Op op) {
+ SkPath rgnPath;
+ if (region->getBoundaryPath(&rgnPath)) {
+ // The region is specified in device space.
+ SkMatrix savedMatrix = mCanvas->getTotalMatrix();
+ mCanvas->resetMatrix();
+ mCanvas->clipPath(rgnPath, op);
+ mCanvas->setMatrix(savedMatrix);
+ } else {
+ mCanvas->clipRect(SkRect::MakeEmpty(), op);
+ }
+ return mCanvas->isClipEmpty();
+}
+
+// ----------------------------------------------------------------------------
+// Canvas state operations: Filters
+// ----------------------------------------------------------------------------
+
+SkDrawFilter* SkiaCanvas::getDrawFilter() {
+ return mCanvas->getDrawFilter();
+}
+
+void SkiaCanvas::setDrawFilter(SkDrawFilter* drawFilter) {
+ mCanvas->setDrawFilter(drawFilter);
+}
+
+// ----------------------------------------------------------------------------
+// Canvas draw operations
+// ----------------------------------------------------------------------------
+
+void SkiaCanvas::drawColor(int color, SkXfermode::Mode mode) {
+ mCanvas->drawColor(color, mode);
+}
+
+void SkiaCanvas::drawPaint(const SkPaint& paint) {
+ mCanvas->drawPaint(paint);
+}
+
+// ----------------------------------------------------------------------------
+// Canvas draw operations: Geometry
+// ----------------------------------------------------------------------------
+
+void SkiaCanvas::drawPoints(const float* points, int count, const SkPaint& paint,
+ SkCanvas::PointMode mode) {
+ // convert the floats into SkPoints
+ count >>= 1; // now it is the number of points
+ SkAutoSTMalloc<32, SkPoint> storage(count);
+ SkPoint* pts = storage.get();
+ for (int i = 0; i < count; i++) {
+ pts[i].set(points[0], points[1]);
+ points += 2;
+ }
+ mCanvas->drawPoints(mode, count, pts, paint);
+}
+
+
+void SkiaCanvas::drawPoint(float x, float y, const SkPaint& paint) {
+ mCanvas->drawPoint(x, y, paint);
+}
+
+void SkiaCanvas::drawPoints(const float* points, int count, const SkPaint& paint) {
+ this->drawPoints(points, count, paint, SkCanvas::kPoints_PointMode);
+}
+
+void SkiaCanvas::drawLine(float startX, float startY, float stopX, float stopY,
+ const SkPaint& paint) {
+ mCanvas->drawLine(startX, startY, stopX, stopY, paint);
+}
+
+void SkiaCanvas::drawLines(const float* points, int count, const SkPaint& paint) {
+ this->drawPoints(points, count, paint, SkCanvas::kLines_PointMode);
+}
+
+void SkiaCanvas::drawRect(float left, float top, float right, float bottom,
+ const SkPaint& paint) {
+ mCanvas->drawRectCoords(left, top, right, bottom, paint);
+
+}
+
+void SkiaCanvas::drawRoundRect(float left, float top, float right, float bottom,
+ float rx, float ry, const SkPaint& paint) {
+ SkRect rect = SkRect::MakeLTRB(left, top, right, bottom);
+ mCanvas->drawRoundRect(rect, rx, ry, paint);
+}
+
+void SkiaCanvas::drawCircle(float x, float y, float radius, const SkPaint& paint) {
+ mCanvas->drawCircle(x, y, radius, paint);
+}
+
+void SkiaCanvas::drawOval(float left, float top, float right, float bottom, const SkPaint& paint) {
+ SkRect oval = SkRect::MakeLTRB(left, top, right, bottom);
+ mCanvas->drawOval(oval, paint);
+}
+
+void SkiaCanvas::drawArc(float left, float top, float right, float bottom,
+ float startAngle, float sweepAngle, bool useCenter, const SkPaint& paint) {
+ SkRect arc = SkRect::MakeLTRB(left, top, right, bottom);
+ mCanvas->drawArc(arc, startAngle, sweepAngle, useCenter, paint);
+}
+
+void SkiaCanvas::drawPath(const SkPath& path, const SkPaint& paint) {
+ mCanvas->drawPath(path, paint);
+}
+
+void SkiaCanvas::drawVertices(SkCanvas::VertexMode vertexMode, int vertexCount,
+ const float* verts, const float* texs, const int* colors,
+ const uint16_t* indices, int indexCount, const SkPaint& paint) {
+#ifndef SK_SCALAR_IS_FLOAT
+ SkDEBUGFAIL("SkScalar must be a float for these conversions to be valid");
+#endif
+ const int ptCount = vertexCount >> 1;
+ mCanvas->drawVertices(vertexMode, ptCount, (SkPoint*)verts, (SkPoint*)texs,
+ (SkColor*)colors, NULL, indices, indexCount, paint);
+}
+
+// ----------------------------------------------------------------------------
+// Canvas draw operations: Bitmaps
+// ----------------------------------------------------------------------------
+
+void SkiaCanvas::drawBitmap(const SkBitmap& bitmap, float left, float top, const SkPaint* paint) {
+ mCanvas->drawBitmap(bitmap, left, top, paint);
+}
+
+void SkiaCanvas::drawBitmap(const SkBitmap& bitmap, const SkMatrix& matrix, const SkPaint* paint) {
+ SkAutoCanvasRestore acr(mCanvas, true);
+ mCanvas->concat(matrix);
+ mCanvas->drawBitmap(bitmap, 0, 0, paint);
+}
+
+void SkiaCanvas::drawBitmap(const SkBitmap& bitmap, float srcLeft, float srcTop,
+ float srcRight, float srcBottom, float dstLeft, float dstTop,
+ float dstRight, float dstBottom, const SkPaint* paint) {
+ SkRect srcRect = SkRect::MakeLTRB(srcLeft, srcTop, srcRight, srcBottom);
+ SkRect dstRect = SkRect::MakeLTRB(dstLeft, dstTop, dstRight, dstBottom);
+ mCanvas->drawBitmapRectToRect(bitmap, &srcRect, dstRect, paint);
+}
+
+void SkiaCanvas::drawBitmapMesh(const SkBitmap& bitmap, int meshWidth, int meshHeight,
+ const float* vertices, const int* colors, const SkPaint* paint) {
+
+ const int ptCount = (meshWidth + 1) * (meshHeight + 1);
+ const int indexCount = meshWidth * meshHeight * 6;
+
+ /* Our temp storage holds 2 or 3 arrays.
+ texture points [ptCount * sizeof(SkPoint)]
+ optionally vertex points [ptCount * sizeof(SkPoint)] if we need a
+ copy to convert from float to fixed
+ indices [ptCount * sizeof(uint16_t)]
+ */
+ ssize_t storageSize = ptCount * sizeof(SkPoint); // texs[]
+ storageSize += indexCount * sizeof(uint16_t); // indices[]
+
+
+#ifndef SK_SCALAR_IS_FLOAT
+ SkDEBUGFAIL("SkScalar must be a float for these conversions to be valid");
+#endif
+ SkAutoMalloc storage(storageSize);
+ SkPoint* texs = (SkPoint*)storage.get();
+ uint16_t* indices = (uint16_t*)(texs + ptCount);
+
+ // cons up texture coordinates and indices
+ {
+ const SkScalar w = SkIntToScalar(bitmap.width());
+ const SkScalar h = SkIntToScalar(bitmap.height());
+ const SkScalar dx = w / meshWidth;
+ const SkScalar dy = h / meshHeight;
+
+ SkPoint* texsPtr = texs;
+ SkScalar y = 0;
+ for (int i = 0; i <= meshHeight; i++) {
+ if (i == meshHeight) {
+ y = h; // to ensure numerically we hit h exactly
+ }
+ SkScalar x = 0;
+ for (int j = 0; j < meshWidth; j++) {
+ texsPtr->set(x, y);
+ texsPtr += 1;
+ x += dx;
+ }
+ texsPtr->set(w, y);
+ texsPtr += 1;
+ y += dy;
+ }
+ SkASSERT(texsPtr - texs == ptCount);
+ }
+
+ // cons up indices
+ {
+ uint16_t* indexPtr = indices;
+ int index = 0;
+ for (int i = 0; i < meshHeight; i++) {
+ for (int j = 0; j < meshWidth; j++) {
+ // lower-left triangle
+ *indexPtr++ = index;
+ *indexPtr++ = index + meshWidth + 1;
+ *indexPtr++ = index + meshWidth + 2;
+ // upper-right triangle
+ *indexPtr++ = index;
+ *indexPtr++ = index + meshWidth + 2;
+ *indexPtr++ = index + 1;
+ // bump to the next cell
+ index += 1;
+ }
+ // bump to the next row
+ index += 1;
+ }
+ SkASSERT(indexPtr - indices == indexCount);
+ SkASSERT((char*)indexPtr - (char*)storage.get() == storageSize);
+ }
+
+ // double-check that we have legal indices
+#ifdef SK_DEBUG
+ {
+ for (int i = 0; i < indexCount; i++) {
+ SkASSERT((unsigned)indices[i] < (unsigned)ptCount);
+ }
+ }
+#endif
+
+ // cons-up a shader for the bitmap
+ SkPaint tmpPaint;
+ if (paint) {
+ tmpPaint = *paint;
+ }
+ SkShader* shader = SkShader::CreateBitmapShader(bitmap,
+ SkShader::kClamp_TileMode,
+ SkShader::kClamp_TileMode);
+ SkSafeUnref(tmpPaint.setShader(shader));
+
+ mCanvas->drawVertices(SkCanvas::kTriangles_VertexMode, ptCount, (SkPoint*)vertices,
+ texs, (const SkColor*)colors, NULL, indices,
+ indexCount, tmpPaint);
+}
+
+// ----------------------------------------------------------------------------
+// Canvas draw operations: Text
+// ----------------------------------------------------------------------------
+
+void SkiaCanvas::drawText(const uint16_t* text, const float* positions, int count,
+ const SkPaint& paint, float x, float y,
+ float boundsLeft, float boundsTop, float boundsRight, float boundsBottom,
+ float totalAdvance) {
+ // Set align to left for drawing, as we don't want individual
+ // glyphs centered or right-aligned; the offset above takes
+ // care of all alignment.
+ SkPaint paintCopy(paint);
+ paintCopy.setTextAlign(SkPaint::kLeft_Align);
+
+ SK_COMPILE_ASSERT(sizeof(SkPoint) == sizeof(float)*2, SkPoint_is_no_longer_2_floats);
+ mCanvas->drawPosText(text, count << 1, reinterpret_cast<const SkPoint*>(positions), paintCopy);
+}
+
+void SkiaCanvas::drawPosText(const uint16_t* text, const float* positions, int count, int posCount,
+ const SkPaint& paint) {
+ SkPoint* posPtr = posCount > 0 ? new SkPoint[posCount] : NULL;
+ int indx;
+ for (indx = 0; indx < posCount; indx++) {
+ posPtr[indx].fX = positions[indx << 1];
+ posPtr[indx].fY = positions[(indx << 1) + 1];
+ }
+
+ SkPaint paintCopy(paint);
+ paintCopy.setTextEncoding(SkPaint::kUTF16_TextEncoding);
+ mCanvas->drawPosText(text, count, posPtr, paintCopy);
+
+ delete[] posPtr;
+}
+
+void SkiaCanvas::drawTextOnPath(const uint16_t* glyphs, int count, const SkPath& path,
+ float hOffset, float vOffset, const SkPaint& paint) {
+ mCanvas->drawTextOnPathHV(glyphs, count, path, hOffset, vOffset, paint);
+}
+
+} // namespace android