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Unified Diff: skia/sgl/SkDraw.cpp

Issue 113827: Remove the remainder of the skia source code from the Chromium repo.... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 11 years, 7 months ago
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Index: skia/sgl/SkDraw.cpp
===================================================================
--- skia/sgl/SkDraw.cpp (revision 16859)
+++ skia/sgl/SkDraw.cpp (working copy)
@@ -1,2358 +0,0 @@
-/* libs/graphics/sgl/SkDraw.cpp
-**
-** Copyright 2006, 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 "SkDraw.h"
-#include "SkBlitter.h"
-#include "SkBounder.h"
-#include "SkCanvas.h"
-#include "SkColorPriv.h"
-#include "SkDevice.h"
-#include "SkMaskFilter.h"
-#include "SkPaint.h"
-#include "SkPathEffect.h"
-#include "SkRasterizer.h"
-#include "SkScan.h"
-#include "SkShader.h"
-#include "SkStroke.h"
-#include "SkTemplatesPriv.h"
-#include "SkUtils.h"
-
-#include "SkAutoKern.h"
-#include "SkBitmapProcShader.h"
-#include "SkDrawProcs.h"
-
-//#define TRACE_BITMAP_DRAWS
-
-class SkAutoRestoreBounder : SkNoncopyable {
-public:
- // note: initializing fBounder is done only to fix a warning
- SkAutoRestoreBounder() : fDraw(NULL), fBounder(NULL) {}
- ~SkAutoRestoreBounder() {
- if (fDraw) {
- fDraw->fBounder = fBounder;
- }
- }
-
- void clearBounder(const SkDraw* draw) {
- fDraw = const_cast<SkDraw*>(draw);
- fBounder = draw->fBounder;
- fDraw->fBounder = NULL;
- }
-
-private:
- SkDraw* fDraw;
- SkBounder* fBounder;
-};
-
-static SkPoint* rect_points(SkRect& r, int index) {
- SkASSERT((unsigned)index < 2);
- return &((SkPoint*)(void*)&r)[index];
-}
-
-/** Helper for allocating small blitters on the stack.
-*/
-
-#define kBlitterStorageLongCount (sizeof(SkBitmapProcShader) >> 2)
-
-class SkAutoBlitterChoose {
-public:
- SkAutoBlitterChoose(const SkBitmap& device, const SkMatrix& matrix,
- const SkPaint& paint) {
- fBlitter = SkBlitter::Choose(device, matrix, paint,
- fStorage, sizeof(fStorage));
- }
- ~SkAutoBlitterChoose();
-
- SkBlitter* operator->() { return fBlitter; }
- SkBlitter* get() const { return fBlitter; }
-
-private:
- SkBlitter* fBlitter;
- uint32_t fStorage[kBlitterStorageLongCount];
-};
-
-SkAutoBlitterChoose::~SkAutoBlitterChoose() {
- if ((void*)fBlitter == (void*)fStorage) {
- fBlitter->~SkBlitter();
- } else {
- SkDELETE(fBlitter);
- }
-}
-
-class SkAutoBitmapShaderInstall {
-public:
- SkAutoBitmapShaderInstall(const SkBitmap& src, const SkPaint* paint)
- : fPaint((SkPaint*)paint) {
- fPrevShader = paint->getShader();
- fPrevShader->safeRef();
- fPaint->setShader(SkShader::CreateBitmapShader( src,
- SkShader::kClamp_TileMode, SkShader::kClamp_TileMode,
- fStorage, sizeof(fStorage)));
- }
- ~SkAutoBitmapShaderInstall() {
- SkShader* shader = fPaint->getShader();
-
- fPaint->setShader(fPrevShader);
- fPrevShader->safeUnref();
-
- if ((void*)shader == (void*)fStorage) {
- shader->~SkShader();
- } else {
- SkDELETE(shader);
- }
- }
-private:
- SkPaint* fPaint;
- SkShader* fPrevShader;
- uint32_t fStorage[kBlitterStorageLongCount];
-};
-
-class SkAutoPaintStyleRestore {
-public:
- SkAutoPaintStyleRestore(const SkPaint& paint, SkPaint::Style style)
- : fPaint((SkPaint&)paint) {
- fStyle = paint.getStyle(); // record the old
- fPaint.setStyle(style); // change it to the specified style
- }
- ~SkAutoPaintStyleRestore() {
- fPaint.setStyle(fStyle); // restore the old
- }
-private:
- SkPaint& fPaint;
- SkPaint::Style fStyle;
-
- // illegal
- SkAutoPaintStyleRestore(const SkAutoPaintStyleRestore&);
- SkAutoPaintStyleRestore& operator=(const SkAutoPaintStyleRestore&);
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-SkDraw::SkDraw(const SkDraw& src) {
- memcpy(this, &src, sizeof(*this));
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-typedef void (*BitmapXferProc)(void* pixels, size_t bytes, uint32_t data);
-
-static void D_Clear_BitmapXferProc(void* pixels, size_t bytes, uint32_t) {
- bzero(pixels, bytes);
-}
-
-static void D_Dst_BitmapXferProc(void*, size_t, uint32_t data) {}
-
-static void D32_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) {
- sk_memset32((uint32_t*)pixels, data, bytes >> 2);
-}
-
-static void D16_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) {
- sk_memset16((uint16_t*)pixels, data, bytes >> 1);
-}
-
-static void DA8_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) {
- memset(pixels, data, bytes);
-}
-
-static BitmapXferProc ChooseBitmapXferProc(const SkBitmap& bitmap,
- const SkPaint& paint,
- uint32_t* data) {
- // todo: we can apply colorfilter up front if no shader, so we wouldn't
- // need to abort this fastpath
- if (paint.getShader() || paint.getColorFilter()) {
- return NULL;
- }
-
- SkPorterDuff::Mode mode;
- if (!SkPorterDuff::IsMode(paint.getXfermode(), &mode)) {
- return NULL;
- }
-
- SkColor color = paint.getColor();
-
- // collaps modes based on color...
- if (SkPorterDuff::kSrcOver_Mode == mode) {
- unsigned alpha = SkColorGetA(color);
- if (0 == alpha) {
- mode = SkPorterDuff::kDst_Mode;
- } else if (0xFF == alpha) {
- mode = SkPorterDuff::kSrc_Mode;
- }
- }
-
- switch (mode) {
- case SkPorterDuff::kClear_Mode:
-// SkDebugf("--- D_Clear_BitmapXferProc\n");
- return D_Clear_BitmapXferProc; // ignore data
- case SkPorterDuff::kDst_Mode:
-// SkDebugf("--- D_Dst_BitmapXferProc\n");
- return D_Dst_BitmapXferProc; // ignore data
- case SkPorterDuff::kSrc_Mode: {
- /*
- should I worry about dithering for the lower depths?
- */
- SkPMColor pmc = SkPreMultiplyColor(color);
- switch (bitmap.config()) {
- case SkBitmap::kARGB_8888_Config:
- if (data) {
- *data = pmc;
- }
-// SkDebugf("--- D32_Src_BitmapXferProc\n");
- return D32_Src_BitmapXferProc;
- case SkBitmap::kARGB_4444_Config:
- if (data) {
- *data = SkPixel32ToPixel4444(pmc);
- }
-// SkDebugf("--- D16_Src_BitmapXferProc\n");
- return D16_Src_BitmapXferProc;
- case SkBitmap::kRGB_565_Config:
- if (data) {
- *data = SkPixel32ToPixel16(pmc);
- }
-// SkDebugf("--- D16_Src_BitmapXferProc\n");
- return D16_Src_BitmapXferProc;
- case SkBitmap::kA8_Config:
- if (data) {
- *data = SkGetPackedA32(pmc);
- }
-// SkDebugf("--- DA8_Src_BitmapXferProc\n");
- return DA8_Src_BitmapXferProc;
- default:
- break;
- }
- break;
- }
- default:
- break;
- }
- return NULL;
-}
-
-static void CallBitmapXferProc(const SkBitmap& bitmap, const SkIRect& rect,
- BitmapXferProc proc, uint32_t procData) {
- int shiftPerPixel;
- switch (bitmap.config()) {
- case SkBitmap::kARGB_8888_Config:
- shiftPerPixel = 2;
- break;
- case SkBitmap::kARGB_4444_Config:
- case SkBitmap::kRGB_565_Config:
- shiftPerPixel = 1;
- break;
- case SkBitmap::kA8_Config:
- shiftPerPixel = 0;
- break;
- default:
- SkASSERT(!"Can't use xferproc on this config");
- return;
- }
-
- uint8_t* pixels = (uint8_t*)bitmap.getPixels();
- SkASSERT(pixels);
- const size_t rowBytes = bitmap.rowBytes();
- const int widthBytes = rect.width() << shiftPerPixel;
-
- // skip down to the first scanline and X position
- pixels += rect.fTop * rowBytes + (rect.fLeft << shiftPerPixel);
- for (int scans = rect.height() - 1; scans >= 0; --scans) {
- proc(pixels, widthBytes, procData);
- pixels += rowBytes;
- }
-}
-
-void SkDraw::drawPaint(const SkPaint& paint) const {
- SkDEBUGCODE(this->validate();)
-
- if (fClip->isEmpty()) {
- return;
- }
-
- SkIRect devRect;
- devRect.set(0, 0, fBitmap->width(), fBitmap->height());
- if (fBounder && !fBounder->doIRect(devRect)) {
- return;
- }
-
- /* If we don't have a shader (i.e. we're just a solid color) we may
- be faster to operate directly on the device bitmap, rather than invoking
- a blitter. Esp. true for xfermodes, which require a colorshader to be
- present, which is just redundant work. Since we're drawing everywhere
- in the clip, we don't have to worry about antialiasing.
- */
- uint32_t procData = 0; // to avoid the warning
- BitmapXferProc proc = ChooseBitmapXferProc(*fBitmap, paint, &procData);
- if (proc) {
- if (D_Dst_BitmapXferProc == proc) { // nothing to do
- return;
- }
-
- SkRegion::Iterator iter(*fClip);
- while (!iter.done()) {
- CallBitmapXferProc(*fBitmap, iter.rect(), proc, procData);
- iter.next();
- }
- } else {
- // normal case: use a blitter
- SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint);
- SkScan::FillIRect(devRect, fClip, blitter.get());
- }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-struct PtProcRec {
- SkCanvas::PointMode fMode;
- const SkPaint* fPaint;
- const SkRegion* fClip;
-
- // computed values
- SkFixed fRadius;
-
- typedef void (*Proc)(const PtProcRec&, const SkPoint devPts[], int count,
- SkBlitter*);
-
- bool init(SkCanvas::PointMode, const SkPaint&, const SkMatrix* matrix,
- const SkRegion* clip);
- Proc chooseProc(SkBlitter* blitter);
-};
-
-static void bw_pt_rect_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
- int count, SkBlitter* blitter) {
- SkASSERT(rec.fClip->isRect());
- const SkIRect& r = rec.fClip->getBounds();
-
- for (int i = 0; i < count; i++) {
- int x = SkScalarFloor(devPts[i].fX);
- int y = SkScalarFloor(devPts[i].fY);
- if (r.contains(x, y)) {
- blitter->blitH(x, y, 1);
- }
- }
-}
-
-static void bw_pt_rect_16_hair_proc(const PtProcRec& rec,
- const SkPoint devPts[], int count,
- SkBlitter* blitter) {
- SkASSERT(rec.fClip->isRect());
- const SkIRect& r = rec.fClip->getBounds();
- uint32_t value;
- const SkBitmap* bitmap = blitter->justAnOpaqueColor(&value);
- SkASSERT(bitmap);
-
- uint16_t* addr = bitmap->getAddr16(0, 0);
- int rb = bitmap->rowBytes();
-
- for (int i = 0; i < count; i++) {
- int x = SkScalarFloor(devPts[i].fX);
- int y = SkScalarFloor(devPts[i].fY);
- if (r.contains(x, y)) {
-// *bitmap->getAddr16(x, y) = SkToU16(value);
- ((uint16_t*)((char*)addr + y * rb))[x] = SkToU16(value);
- }
- }
-}
-
-static void bw_pt_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
- int count, SkBlitter* blitter) {
- for (int i = 0; i < count; i++) {
- int x = SkScalarFloor(devPts[i].fX);
- int y = SkScalarFloor(devPts[i].fY);
- if (rec.fClip->contains(x, y)) {
- blitter->blitH(x, y, 1);
- }
- }
-}
-
-static void bw_line_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
- int count, SkBlitter* blitter) {
- for (int i = 0; i < count; i += 2) {
- SkScan::HairLine(devPts[i], devPts[i+1], rec.fClip, blitter);
- }
-}
-
-static void bw_poly_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
- int count, SkBlitter* blitter) {
- for (int i = 0; i < count - 1; i++) {
- SkScan::HairLine(devPts[i], devPts[i+1], rec.fClip, blitter);
- }
-}
-
-// aa versions
-
-static void aa_line_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
- int count, SkBlitter* blitter) {
- for (int i = 0; i < count; i += 2) {
- SkScan::AntiHairLine(devPts[i], devPts[i+1], rec.fClip, blitter);
- }
-}
-
-static void aa_poly_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
- int count, SkBlitter* blitter) {
- for (int i = 0; i < count - 1; i++) {
- SkScan::AntiHairLine(devPts[i], devPts[i+1], rec.fClip, blitter);
- }
-}
-
-// square procs (strokeWidth > 0 but matrix is square-scale (sx == sy)
-
-static void bw_square_proc(const PtProcRec& rec, const SkPoint devPts[],
- int count, SkBlitter* blitter) {
- const SkFixed radius = rec.fRadius;
- for (int i = 0; i < count; i++) {
- SkFixed x = SkScalarToFixed(devPts[i].fX);
- SkFixed y = SkScalarToFixed(devPts[i].fY);
-
- SkXRect r;
- r.fLeft = x - radius;
- r.fTop = y - radius;
- r.fRight = x + radius;
- r.fBottom = y + radius;
-
- SkScan::FillXRect(r, rec.fClip, blitter);
- }
-}
-
-static void aa_square_proc(const PtProcRec& rec, const SkPoint devPts[],
- int count, SkBlitter* blitter) {
- const SkFixed radius = rec.fRadius;
- for (int i = 0; i < count; i++) {
- SkFixed x = SkScalarToFixed(devPts[i].fX);
- SkFixed y = SkScalarToFixed(devPts[i].fY);
-
- SkXRect r;
- r.fLeft = x - radius;
- r.fTop = y - radius;
- r.fRight = x + radius;
- r.fBottom = y + radius;
-
- SkScan::AntiFillXRect(r, rec.fClip, blitter);
- }
-}
-
-bool PtProcRec::init(SkCanvas::PointMode mode, const SkPaint& paint,
- const SkMatrix* matrix, const SkRegion* clip) {
- if (paint.getPathEffect()) {
- return false;
- }
- SkScalar width = paint.getStrokeWidth();
- if (0 == width) {
- fMode = mode;
- fPaint = &paint;
- fClip = clip;
- fRadius = SK_Fixed1 >> 1;
- return true;
- }
- if (matrix->rectStaysRect() && SkCanvas::kPoints_PointMode == mode) {
- SkScalar sx = matrix->get(SkMatrix::kMScaleX);
- SkScalar sy = matrix->get(SkMatrix::kMScaleY);
- if (SkScalarNearlyZero(sx - sy)) {
- if (sx < 0) {
- sx = -sx;
- }
-
- fMode = mode;
- fPaint = &paint;
- fClip = clip;
- fRadius = SkScalarToFixed(SkScalarMul(width, sx)) >> 1;
- return true;
- }
- }
- return false;
-}
-
-PtProcRec::Proc PtProcRec::chooseProc(SkBlitter* blitter) {
- Proc proc;
-
- // for our arrays
- SkASSERT(0 == SkCanvas::kPoints_PointMode);
- SkASSERT(1 == SkCanvas::kLines_PointMode);
- SkASSERT(2 == SkCanvas::kPolygon_PointMode);
- SkASSERT((unsigned)fMode <= (unsigned)SkCanvas::kPolygon_PointMode);
-
- // first check for hairlines
- if (0 == fPaint->getStrokeWidth()) {
- if (fPaint->isAntiAlias()) {
- static const Proc gAAProcs[] = {
- aa_square_proc, aa_line_hair_proc, aa_poly_hair_proc
- };
- proc = gAAProcs[fMode];
- } else {
- if (SkCanvas::kPoints_PointMode == fMode && fClip->isRect()) {
- uint32_t value;
- const SkBitmap* bm = blitter->justAnOpaqueColor(&value);
- if (bm && bm->config() == SkBitmap::kRGB_565_Config) {
- proc = bw_pt_rect_16_hair_proc;
- } else {
- proc = bw_pt_rect_hair_proc;
- }
- } else {
- static Proc gBWProcs[] = {
- bw_pt_hair_proc, bw_line_hair_proc, bw_poly_hair_proc
- };
- proc = gBWProcs[fMode];
- }
- }
- } else {
- SkASSERT(SkCanvas::kPoints_PointMode == fMode);
- if (fPaint->isAntiAlias()) {
- proc = aa_square_proc;
- } else {
- proc = bw_square_proc;
- }
- }
- return proc;
-}
-
-static bool bounder_points(SkBounder* bounder, SkCanvas::PointMode mode,
- size_t count, const SkPoint pts[],
- const SkPaint& paint, const SkMatrix& matrix) {
- SkIRect ibounds;
- SkRect bounds;
- SkScalar inset = paint.getStrokeWidth();
-
- bounds.set(pts, count);
- bounds.inset(-inset, -inset);
- matrix.mapRect(&bounds);
-
- bounds.roundOut(&ibounds);
- return bounder->doIRect(ibounds);
-}
-
-// each of these costs 8-bytes of stack space, so don't make it too large
-// must be even for lines/polygon to work
-#define MAX_DEV_PTS 32
-
-void SkDraw::drawPoints(SkCanvas::PointMode mode, size_t count,
- const SkPoint pts[], const SkPaint& paint) const {
- // if we're in lines mode, force count to be even
- if (SkCanvas::kLines_PointMode == mode) {
- count &= ~(size_t)1;
- }
-
- if ((long)count <= 0) {
- return;
- }
-
- SkAutoRestoreBounder arb;
-
- if (fBounder) {
- if (!bounder_points(fBounder, mode, count, pts, paint, *fMatrix)) {
- return;
- }
- // clear the bounder for the rest of this function, so we don't call it
- // again later if we happen to call ourselves for drawRect, drawPath,
- // etc.
- arb.clearBounder(this);
- }
-
- SkASSERT(pts != NULL);
- SkDEBUGCODE(this->validate();)
-
- // nothing to draw
- if (fClip->isEmpty() ||
- (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) {
- return;
- }
-
- PtProcRec rec;
- if (rec.init(mode, paint, fMatrix, fClip)) {
- SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint);
-
- SkPoint devPts[MAX_DEV_PTS];
- const SkMatrix* matrix = fMatrix;
- SkBlitter* bltr = blitter.get();
- PtProcRec::Proc proc = rec.chooseProc(bltr);
- // we have to back up subsequent passes if we're in polygon mode
- const size_t backup = (SkCanvas::kPolygon_PointMode == mode);
-
- do {
- size_t n = count;
- if (n > MAX_DEV_PTS) {
- n = MAX_DEV_PTS;
- }
- matrix->mapPoints(devPts, pts, n);
- proc(rec, devPts, n, bltr);
- pts += n - backup;
- SkASSERT(count >= n);
- count -= n;
- if (count > 0) {
- count += backup;
- }
- } while (count != 0);
- } else {
- switch (mode) {
- case SkCanvas::kPoints_PointMode: {
- // temporarily mark the paint as filling.
- SkAutoPaintStyleRestore restore(paint, SkPaint::kFill_Style);
-
- SkScalar width = paint.getStrokeWidth();
- SkScalar radius = SkScalarHalf(width);
-
- if (paint.getStrokeCap() == SkPaint::kRound_Cap) {
- SkPath path;
- SkMatrix preMatrix;
-
- path.addCircle(0, 0, radius);
- for (size_t i = 0; i < count; i++) {
- preMatrix.setTranslate(pts[i].fX, pts[i].fY);
- // pass true for the last point, since we can modify
- // then path then
- this->drawPath(path, paint, &preMatrix, (count-1) == i);
- }
- } else {
- SkRect r;
-
- for (size_t i = 0; i < count; i++) {
- r.fLeft = pts[i].fX - radius;
- r.fTop = pts[i].fY - radius;
- r.fRight = r.fLeft + width;
- r.fBottom = r.fTop + width;
- this->drawRect(r, paint);
- }
- }
- break;
- }
- case SkCanvas::kLines_PointMode:
- case SkCanvas::kPolygon_PointMode: {
- count -= 1;
- SkPath path;
- SkPaint p(paint);
- p.setStyle(SkPaint::kStroke_Style);
- size_t inc = (SkCanvas::kLines_PointMode == mode) ? 2 : 1;
- for (size_t i = 0; i < count; i += inc) {
- path.moveTo(pts[i]);
- path.lineTo(pts[i+1]);
- this->drawPath(path, p, NULL, true);
- path.rewind();
- }
- break;
- }
- }
- }
-}
-
-static inline SkPoint* as_lefttop(SkRect* r) {
- return (SkPoint*)(void*)r;
-}
-
-static inline SkPoint* as_rightbottom(SkRect* r) {
- return ((SkPoint*)(void*)r) + 1;
-}
-
-void SkDraw::drawRect(const SkRect& rect, const SkPaint& paint) const {
- SkDEBUGCODE(this->validate();)
-
- // nothing to draw
- if (fClip->isEmpty() ||
- (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) {
- return;
- }
-
- // complex enough to draw as a path
- if (paint.getPathEffect() || paint.getMaskFilter() ||
- paint.getRasterizer() || !fMatrix->rectStaysRect() ||
- (paint.getStyle() != SkPaint::kFill_Style &&
- SkScalarHalf(paint.getStrokeWidth()) > 0)) {
- SkPath tmp;
- tmp.addRect(rect);
- tmp.setFillType(SkPath::kWinding_FillType);
- this->drawPath(tmp, paint);
- return;
- }
-
- const SkMatrix& matrix = *fMatrix;
- SkRect devRect;
-
- // transform rect into devRect
- {
- matrix.mapXY(rect.fLeft, rect.fTop, rect_points(devRect, 0));
- matrix.mapXY(rect.fRight, rect.fBottom, rect_points(devRect, 1));
- devRect.sort();
- }
-
- if (fBounder && !fBounder->doRect(devRect, paint)) {
- return;
- }
-
- // look for the quick exit, before we build a blitter
- {
- SkIRect ir;
- devRect.roundOut(&ir);
- if (fClip->quickReject(ir))
- return;
- }
-
- SkAutoBlitterChoose blitterStorage(*fBitmap, matrix, paint);
- SkBlitter* blitter = blitterStorage.get();
- const SkRegion* clip = fClip;
-
- if (paint.getStyle() == SkPaint::kFill_Style) {
- if (paint.isAntiAlias()) {
- SkScan::AntiFillRect(devRect, clip, blitter);
- } else {
- SkScan::FillRect(devRect, clip, blitter);
- }
- } else {
- if (paint.isAntiAlias()) {
- SkScan::AntiHairRect(devRect, clip, blitter);
- } else {
- SkScan::HairRect(devRect, clip, blitter);
- }
- }
-}
-
-void SkDraw::drawDevMask(const SkMask& srcM, const SkPaint& paint) const {
- if (srcM.fBounds.isEmpty()) {
- return;
- }
-
- SkMask dstM;
- const SkMask* mask = &srcM;
-
- dstM.fImage = NULL;
- SkAutoMaskImage ami(&dstM, false);
-
- if (paint.getMaskFilter() &&
- paint.getMaskFilter()->filterMask(&dstM, srcM, *fMatrix, NULL)) {
- mask = &dstM;
- }
-
- if (fBounder && !fBounder->doIRect(mask->fBounds)) {
- return;
- }
-
- SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint);
-
- blitter->blitMaskRegion(*mask, *fClip);
-}
-
-class SkAutoPaintRestoreColorStrokeWidth {
-public:
- SkAutoPaintRestoreColorStrokeWidth(const SkPaint& paint) {
- fPaint = (SkPaint*)&paint;
- fColor = paint.getColor();
- fWidth = paint.getStrokeWidth();
- }
- ~SkAutoPaintRestoreColorStrokeWidth() {
- fPaint->setColor(fColor);
- fPaint->setStrokeWidth(fWidth);
- }
-
-private:
- SkPaint* fPaint;
- SkColor fColor;
- SkScalar fWidth;
-};
-
-void SkDraw::drawPath(const SkPath& origSrcPath, const SkPaint& paint,
- const SkMatrix* prePathMatrix, bool pathIsMutable) const {
- SkDEBUGCODE(this->validate();)
-
- // nothing to draw
- if (fClip->isEmpty() ||
- (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) {
- return;
- }
-
- SkPath* pathPtr = (SkPath*)&origSrcPath;
- bool doFill = true;
- SkPath tmpPath;
- SkMatrix tmpMatrix;
- const SkMatrix* matrix = fMatrix;
-
- if (prePathMatrix) {
- if (paint.getPathEffect() || paint.getStyle() != SkPaint::kFill_Style ||
- paint.getRasterizer()) {
- SkPath* result = pathPtr;
-
- if (!pathIsMutable) {
- result = &tmpPath;
- pathIsMutable = true;
- }
- pathPtr->transform(*prePathMatrix, result);
- pathPtr = result;
- } else {
- if (!tmpMatrix.setConcat(*matrix, *prePathMatrix)) {
- // overflow
- return;
- }
- matrix = &tmpMatrix;
- }
- }
- // at this point we're done with prePathMatrix
- SkDEBUGCODE(prePathMatrix = (const SkMatrix*)0x50FF8001;)
-
- /*
- If the device thickness < 1.0, then make it a hairline, and
- modulate alpha if the thickness is even smaller (e.g. thickness == 0.5
- should modulate the alpha by 1/2)
- */
-
- SkAutoPaintRestoreColorStrokeWidth aprc(paint);
-
- if (paint.getStyle() == SkPaint::kStroke_Style &&
- paint.getXfermode() == NULL &&
- (matrix->getType() & SkMatrix::kPerspective_Mask) == 0) {
- SkScalar width = paint.getStrokeWidth();
- if (width > 0) {
- width = matrix->mapRadius(paint.getStrokeWidth());
- if (width < SK_Scalar1) {
- int scale = (int)SkScalarMul(width, 256);
- int alpha = paint.getAlpha() * scale >> 8;
-
- // pretend to be a hairline, with a modulated alpha
- ((SkPaint*)&paint)->setAlpha(alpha);
- ((SkPaint*)&paint)->setStrokeWidth(0);
-
-// SkDebugf("------ convert to hairline %d\n", scale);
- }
- }
- }
-
- if (paint.getPathEffect() || paint.getStyle() != SkPaint::kFill_Style) {
- doFill = paint.getFillPath(*pathPtr, &tmpPath);
- pathPtr = &tmpPath;
- }
-
- if (paint.getRasterizer()) {
- SkMask mask;
- if (paint.getRasterizer()->rasterize(*pathPtr, *matrix,
- &fClip->getBounds(), paint.getMaskFilter(), &mask,
- SkMask::kComputeBoundsAndRenderImage_CreateMode)) {
- this->drawDevMask(mask, paint);
- SkMask::FreeImage(mask.fImage);
- }
- return;
- }
-
- // avoid possibly allocating a new path in transform if we can
- SkPath* devPathPtr = pathIsMutable ? pathPtr : &tmpPath;
-
- // transform the path into device space
- pathPtr->transform(*matrix, devPathPtr);
-
- SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint);
-
- // how does filterPath() know to fill or hairline the path??? <mrr>
- if (paint.getMaskFilter() &&
- paint.getMaskFilter()->filterPath(*devPathPtr, *fMatrix, *fClip,
- fBounder, blitter.get())) {
- return; // filterPath() called the blitter, so we're done
- }
-
- if (fBounder && !fBounder->doPath(*devPathPtr, paint, doFill)) {
- return;
- }
-
- if (doFill) {
- if (paint.isAntiAlias()) {
- SkScan::AntiFillPath(*devPathPtr, *fClip, blitter.get());
- } else {
- SkScan::FillPath(*devPathPtr, *fClip, blitter.get());
- }
- } else { // hairline
- if (paint.isAntiAlias()) {
- SkScan::AntiHairPath(*devPathPtr, fClip, blitter.get());
- } else {
- SkScan::HairPath(*devPathPtr, fClip, blitter.get());
- }
- }
-}
-
-static inline bool just_translate(const SkMatrix& m) {
- return (m.getType() & ~SkMatrix::kTranslate_Mask) == 0;
-}
-
-void SkDraw::drawBitmapAsMask(const SkBitmap& bitmap,
- const SkPaint& paint) const {
- SkASSERT(bitmap.getConfig() == SkBitmap::kA8_Config);
-
- if (just_translate(*fMatrix)) {
- int ix = SkScalarRound(fMatrix->getTranslateX());
- int iy = SkScalarRound(fMatrix->getTranslateY());
-
- SkMask mask;
- mask.fBounds.set(ix, iy, ix + bitmap.width(), iy + bitmap.height());
- mask.fFormat = SkMask::kA8_Format;
- mask.fRowBytes = bitmap.rowBytes();
- mask.fImage = bitmap.getAddr8(0, 0);
-
- this->drawDevMask(mask, paint);
- } else { // need to xform the bitmap first
- SkRect r;
- SkMask mask;
-
- r.set(0, 0,
- SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height()));
- fMatrix->mapRect(&r);
- r.round(&mask.fBounds);
-
- // set the mask's bounds to the transformed bitmap-bounds,
- // clipped to the actual device
- {
- SkIRect devBounds;
- devBounds.set(0, 0, fBitmap->width(), fBitmap->height());
- // need intersect(l, t, r, b) on irect
- if (!mask.fBounds.intersect(devBounds)) {
- return;
- }
- }
-
- mask.fFormat = SkMask::kA8_Format;
- mask.fRowBytes = SkAlign4(mask.fBounds.width());
- size_t size = mask.computeImageSize();
- if (0 == size) {
- // the mask is too big to allocated, draw nothing
- return;
- }
-
- // allocate (and clear) our temp buffer to hold the transformed bitmap
- SkAutoMalloc storage(size);
- mask.fImage = (uint8_t*)storage.get();
- memset(mask.fImage, 0, size);
-
- // now draw our bitmap(src) into mask(dst), transformed by the matrix
- {
- SkBitmap device;
- device.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(),
- mask.fBounds.height(), mask.fRowBytes);
- device.setPixels(mask.fImage);
-
- SkCanvas c(device);
- // need the unclipped top/left for the translate
- c.translate(-SkIntToScalar(mask.fBounds.fLeft),
- -SkIntToScalar(mask.fBounds.fTop));
- c.concat(*fMatrix);
- c.drawBitmap(bitmap, 0, 0, NULL);
- }
- this->drawDevMask(mask, paint);
- }
-}
-
-static bool clipped_out(const SkMatrix& m, const SkRegion& c,
- const SkRect& srcR) {
- SkRect dstR;
- SkIRect devIR;
-
- m.mapRect(&dstR, srcR);
- dstR.roundOut(&devIR);
- return c.quickReject(devIR);
-}
-
-static bool clipped_out(const SkMatrix& matrix, const SkRegion& clip,
- int width, int height) {
- SkRect r;
- r.set(0, 0, SkIntToScalar(width), SkIntToScalar(height));
- return clipped_out(matrix, clip, r);
-}
-
-void SkDraw::drawBitmap(const SkBitmap& bitmap, const SkMatrix& prematrix,
- const SkPaint& paint) const {
- SkDEBUGCODE(this->validate();)
-
- // nothing to draw
- if (fClip->isEmpty() ||
- bitmap.width() == 0 || bitmap.height() == 0 ||
- bitmap.getConfig() == SkBitmap::kNo_Config ||
- (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) {
- return;
- }
-
- // run away on too-big bitmaps for now (exceed 16.16)
- if (bitmap.width() > 32767 || bitmap.height() > 32767) {
- return;
- }
-
- SkAutoPaintStyleRestore restore(paint, SkPaint::kFill_Style);
-
- SkMatrix matrix;
- if (!matrix.setConcat(*fMatrix, prematrix)) {
- return;
- }
-
- // do I need to call the bounder first???
- if (clipped_out(matrix, *fClip, bitmap.width(), bitmap.height())) {
- return;
- }
-
- // only lock the pixels if we passed the clip test
- SkAutoLockPixels alp(bitmap);
- // after the lock, check if we are valid
- if (!bitmap.readyToDraw()) {
- return;
- }
-
- if (bitmap.getConfig() != SkBitmap::kA8_Config && just_translate(matrix)) {
- int ix = SkScalarRound(matrix.getTranslateX());
- int iy = SkScalarRound(matrix.getTranslateY());
- uint32_t storage[kBlitterStorageLongCount];
- SkBlitter* blitter = SkBlitter::ChooseSprite(*fBitmap, paint, bitmap,
- ix, iy, storage, sizeof(storage));
- if (blitter) {
- SkAutoTPlacementDelete<SkBlitter> ad(blitter, storage);
-
- SkIRect ir;
- ir.set(ix, iy, ix + bitmap.width(), iy + bitmap.height());
-
- if (fBounder && !fBounder->doIRect(ir)) {
- return;
- }
-
- SkRegion::Cliperator iter(*fClip, ir);
- const SkIRect& cr = iter.rect();
-
- for (; !iter.done(); iter.next()) {
- SkASSERT(!cr.isEmpty());
- blitter->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height());
- }
- return;
- }
-#if 0
- SkDebugf("---- MISSING sprite case: config=%d [%d %d], device=%d, xfer=%p, alpha=0x%X colorFilter=%p\n",
- bitmap.config(), bitmap.width(), bitmap.height(), fBitmap->config(),
- paint.getXfermode(), paint.getAlpha(), paint.getColorFilter());
-#endif
- }
-
- // now make a temp draw on the stack, and use it
- //
- SkDraw draw(*this);
- draw.fMatrix = &matrix;
-
- if (bitmap.getConfig() == SkBitmap::kA8_Config) {
- draw.drawBitmapAsMask(bitmap, paint);
- } else {
- SkAutoBitmapShaderInstall install(bitmap, &paint);
-
- SkRect r;
- r.set(0, 0, SkIntToScalar(bitmap.width()),
- SkIntToScalar(bitmap.height()));
- // is this ok if paint has a rasterizer?
- draw.drawRect(r, paint);
- }
-}
-
-void SkDraw::drawSprite(const SkBitmap& bitmap, int x, int y,
- const SkPaint& paint) const {
- SkDEBUGCODE(this->validate();)
-
- // nothing to draw
- if (fClip->isEmpty() ||
- bitmap.width() == 0 || bitmap.height() == 0 ||
- bitmap.getConfig() == SkBitmap::kNo_Config ||
- (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) {
- return;
- }
-
- SkIRect bounds;
- bounds.set(x, y, x + bitmap.width(), y + bitmap.height());
-
- if (fClip->quickReject(bounds)) {
- return; // nothing to draw
- }
-
- SkAutoPaintStyleRestore restore(paint, SkPaint::kFill_Style);
-
- if (NULL == paint.getColorFilter()) {
- uint32_t storage[kBlitterStorageLongCount];
- SkBlitter* blitter = SkBlitter::ChooseSprite(*fBitmap, paint, bitmap,
- x, y, storage, sizeof(storage));
-
- if (blitter) {
- SkAutoTPlacementDelete<SkBlitter> ad(blitter, storage);
-
- if (fBounder && !fBounder->doIRect(bounds)) {
- return;
- }
-
- SkRegion::Cliperator iter(*fClip, bounds);
- const SkIRect& cr = iter.rect();
-
- for (; !iter.done(); iter.next()) {
- SkASSERT(!cr.isEmpty());
- blitter->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height());
- }
- return;
- }
- }
-
- SkAutoBitmapShaderInstall install(bitmap, &paint);
-
- SkMatrix matrix;
- SkRect r;
-
- // get a scalar version of our rect
- r.set(bounds);
-
- // tell the shader our offset
- matrix.setTranslate(r.fLeft, r.fTop);
- paint.getShader()->setLocalMatrix(matrix);
-
- SkDraw draw(*this);
- matrix.reset();
- draw.fMatrix = &matrix;
- // call ourself with a rect
- // is this OK if paint has a rasterizer?
- draw.drawRect(r, paint);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-#include "SkScalerContext.h"
-#include "SkGlyphCache.h"
-#include "SkUtils.h"
-
-static void measure_text(SkGlyphCache* cache, SkDrawCacheProc glyphCacheProc,
- const char text[], size_t byteLength, SkVector* stopVector) {
- SkFixed x = 0, y = 0;
- const char* stop = text + byteLength;
-
- SkAutoKern autokern;
-
- while (text < stop) {
- // don't need x, y here, since all subpixel variants will have the
- // same advance
- const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0);
-
- x += autokern.adjust(glyph) + glyph.fAdvanceX;
- y += glyph.fAdvanceY;
- }
- stopVector->set(SkFixedToScalar(x), SkFixedToScalar(y));
-
- SkASSERT(text == stop);
-}
-
-void SkDraw::drawText_asPaths(const char text[], size_t byteLength,
- SkScalar x, SkScalar y,
- const SkPaint& paint) const {
- SkDEBUGCODE(this->validate();)
-
- SkTextToPathIter iter(text, byteLength, paint, true, true);
-
- SkMatrix matrix;
- matrix.setScale(iter.getPathScale(), iter.getPathScale());
- matrix.postTranslate(x, y);
-
- const SkPath* iterPath;
- SkScalar xpos, prevXPos = 0;
-
- while ((iterPath = iter.next(&xpos)) != NULL) {
- matrix.postTranslate(xpos - prevXPos, 0);
- this->drawPath(*iterPath, iter.getPaint(), &matrix, false);
- prevXPos = xpos;
- }
-}
-
-#define kStdStrikeThru_Offset (-SK_Scalar1 * 6 / 21)
-#define kStdUnderline_Offset (SK_Scalar1 / 9)
-#define kStdUnderline_Thickness (SK_Scalar1 / 18)
-
-static void draw_paint_rect(const SkDraw* draw, const SkPaint& paint,
- const SkRect& r, SkScalar textSize) {
- if (paint.getStyle() == SkPaint::kFill_Style) {
- draw->drawRect(r, paint);
- } else {
- SkPaint p(paint);
- p.setStrokeWidth(SkScalarMul(textSize, paint.getStrokeWidth()));
- draw->drawRect(r, p);
- }
-}
-
-static void handle_aftertext(const SkDraw* draw, const SkPaint& paint,
- SkScalar width, const SkPoint& start) {
- uint32_t flags = paint.getFlags();
-
- if (flags & (SkPaint::kUnderlineText_Flag |
- SkPaint::kStrikeThruText_Flag)) {
- SkScalar textSize = paint.getTextSize();
- SkScalar height = SkScalarMul(textSize, kStdUnderline_Thickness);
- SkRect r;
-
- r.fLeft = start.fX;
- r.fRight = start.fX + width;
-
- if (flags & SkPaint::kUnderlineText_Flag) {
- SkScalar offset = SkScalarMulAdd(textSize, kStdUnderline_Offset,
- start.fY);
- r.fTop = offset;
- r.fBottom = offset + height;
- draw_paint_rect(draw, paint, r, textSize);
- }
- if (flags & SkPaint::kStrikeThruText_Flag) {
- SkScalar offset = SkScalarMulAdd(textSize, kStdStrikeThru_Offset,
- start.fY);
- r.fTop = offset;
- r.fBottom = offset + height;
- draw_paint_rect(draw, paint, r, textSize);
- }
- }
-}
-
-// disable warning : local variable used without having been initialized
-#if defined _WIN32 && _MSC_VER >= 1300
-#pragma warning ( push )
-#pragma warning ( disable : 4701 )
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-
-static void D1G_NoBounder_RectClip(const SkDraw1Glyph& state,
- const SkGlyph& glyph, int left, int top) {
- SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0);
- SkASSERT(state.fClip->isRect());
- SkASSERT(NULL == state.fBounder);
- SkASSERT(state.fClipBounds == state.fClip->getBounds());
-
- left += glyph.fLeft;
- top += glyph.fTop;
-
- int right = left + glyph.fWidth;
- int bottom = top + glyph.fHeight;
-
- SkMask mask;
- SkIRect storage;
- SkIRect* bounds = &mask.fBounds;
-
- mask.fBounds.set(left, top, right, bottom);
-
- // this extra test is worth it, assuming that most of the time it succeeds
- // since we can avoid writing to storage
- if (!state.fClipBounds.containsNoEmptyCheck(left, top, right, bottom)) {
- if (!storage.intersectNoEmptyCheck(mask.fBounds, state.fClipBounds))
- return;
- bounds = &storage;
- }
-
- uint8_t* aa = (uint8_t*)glyph.fImage;
- if (NULL == aa) {
- aa = (uint8_t*)state.fCache->findImage(glyph);
- if (NULL == aa) {
- return; // can't rasterize glyph
- }
- }
-
- mask.fRowBytes = glyph.rowBytes();
- mask.fFormat = glyph.fMaskFormat;
- mask.fImage = aa;
- state.fBlitter->blitMask(mask, *bounds);
-}
-
-static void D1G_NoBounder_RgnClip(const SkDraw1Glyph& state,
- const SkGlyph& glyph, int left, int top) {
- SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0);
- SkASSERT(!state.fClip->isRect());
- SkASSERT(NULL == state.fBounder);
-
- SkMask mask;
-
- left += glyph.fLeft;
- top += glyph.fTop;
-
- mask.fBounds.set(left, top, left + glyph.fWidth, top + glyph.fHeight);
- SkRegion::Cliperator clipper(*state.fClip, mask.fBounds);
-
- if (!clipper.done()) {
- const SkIRect& cr = clipper.rect();
- const uint8_t* aa = (const uint8_t*)glyph.fImage;
- if (NULL == aa) {
- aa = (uint8_t*)state.fCache->findImage(glyph);
- if (NULL == aa) {
- return;
- }
- }
-
- mask.fRowBytes = glyph.rowBytes();
- mask.fFormat = glyph.fMaskFormat;
- mask.fImage = (uint8_t*)aa;
- do {
- state.fBlitter->blitMask(mask, cr);
- clipper.next();
- } while (!clipper.done());
- }
-}
-
-static void D1G_Bounder(const SkDraw1Glyph& state,
- const SkGlyph& glyph, int left, int top) {
- SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0);
-
- SkMask mask;
-
- left += glyph.fLeft;
- top += glyph.fTop;
-
- mask.fBounds.set(left, top, left + glyph.fWidth, top + glyph.fHeight);
- SkRegion::Cliperator clipper(*state.fClip, mask.fBounds);
-
- if (!clipper.done()) {
- const SkIRect& cr = clipper.rect();
- const uint8_t* aa = (const uint8_t*)glyph.fImage;
- if (NULL == aa) {
- aa = (uint8_t*)state.fCache->findImage(glyph);
- if (NULL == aa) {
- return;
- }
- }
-
- if (state.fBounder->doIRect(cr)) {
- mask.fRowBytes = glyph.rowBytes();
- mask.fFormat = glyph.fMaskFormat;
- mask.fImage = (uint8_t*)aa;
- do {
- state.fBlitter->blitMask(mask, cr);
- clipper.next();
- } while (!clipper.done());
- }
- }
-}
-
-SkDraw1Glyph::Proc SkDraw1Glyph::init(const SkDraw* draw, SkBlitter* blitter,
- SkGlyphCache* cache) {
- fDraw = draw;
- fBounder = draw->fBounder;
- fClip = draw->fClip;
- fClipBounds = fClip->getBounds();
- fBlitter = blitter;
- fCache = cache;
-
- if (draw->fProcs && draw->fProcs->fD1GProc) {
- return draw->fProcs->fD1GProc;
- }
-
- if (NULL == fBounder) {
- if (fClip->isRect()) {
- return D1G_NoBounder_RectClip;
- } else {
- return D1G_NoBounder_RgnClip;
- }
- } else {
- return D1G_Bounder;
- }
-}
-
-enum RoundBaseline {
- kDont_Round_Baseline,
- kRound_X_Baseline,
- kRound_Y_Baseline
-};
-
-static RoundBaseline computeRoundBaseline(const SkMatrix& mat) {
- if (mat[1] == 0 && mat[3] == 0) {
- // we're 0 or 180 degrees, round the y coordinate of the baseline
- return kRound_Y_Baseline;
- } else if (mat[0] == 0 && mat[4] == 0) {
- // we're 90 or 270 degrees, round the x coordinate of the baseline
- return kRound_X_Baseline;
- } else {
- return kDont_Round_Baseline;
- }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-void SkDraw::drawText(const char text[], size_t byteLength,
- SkScalar x, SkScalar y, const SkPaint& paint) const {
- SkASSERT(byteLength == 0 || text != NULL);
-
- SkDEBUGCODE(this->validate();)
-
- // nothing to draw
- if (text == NULL || byteLength == 0 ||
- fClip->isEmpty() ||
- (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) {
- return;
- }
-
- SkScalar underlineWidth = 0;
- SkPoint underlineStart;
-
- underlineStart.set(0, 0); // to avoid warning
- if (paint.getFlags() & (SkPaint::kUnderlineText_Flag |
- SkPaint::kStrikeThruText_Flag)) {
- underlineWidth = paint.measureText(text, byteLength);
-
- SkScalar offsetX = 0;
- if (paint.getTextAlign() == SkPaint::kCenter_Align) {
- offsetX = SkScalarHalf(underlineWidth);
- } else if (paint.getTextAlign() == SkPaint::kRight_Align) {
- offsetX = underlineWidth;
- }
- underlineStart.set(x - offsetX, y);
- }
-
- if (/*paint.isLinearText() ||*/
- (fMatrix->getType() & SkMatrix::kPerspective_Mask)) {
- this->drawText_asPaths(text, byteLength, x, y, paint);
- handle_aftertext(this, paint, underlineWidth, underlineStart);
- return;
- }
-
- SkDrawCacheProc glyphCacheProc = paint.getDrawCacheProc();
-
- SkAutoGlyphCache autoCache(paint, fMatrix);
- SkGlyphCache* cache = autoCache.getCache();
- SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint);
-
- // transform our starting point
- {
- SkPoint loc;
- fMatrix->mapXY(x, y, &loc);
- x = loc.fX;
- y = loc.fY;
- }
-
- // need to measure first
- if (paint.getTextAlign() != SkPaint::kLeft_Align) {
- SkVector stop;
-
- measure_text(cache, glyphCacheProc, text, byteLength, &stop);
-
- SkScalar stopX = stop.fX;
- SkScalar stopY = stop.fY;
-
- if (paint.getTextAlign() == SkPaint::kCenter_Align) {
- stopX = SkScalarHalf(stopX);
- stopY = SkScalarHalf(stopY);
- }
- x -= stopX;
- y -= stopY;
- }
-
- SkFixed fx = SkScalarToFixed(x);
- SkFixed fy = SkScalarToFixed(y);
- const char* stop = text + byteLength;
-
- if (paint.isSubpixelText()) {
- RoundBaseline roundBaseline = computeRoundBaseline(*fMatrix);
- if (kRound_Y_Baseline == roundBaseline) {
- fy = (fy + 0x8000) & ~0xFFFF;
- } else if (kRound_X_Baseline == roundBaseline) {
- fx = (fx + 0x8000) & ~0xFFFF;
- }
- } else {
- // apply the bias here, so we don't have to add 1/2 in the loop
- fx += SK_Fixed1/2;
- fy += SK_Fixed1/2;
- }
-
- SkAutoKern autokern;
- SkDraw1Glyph d1g;
- SkDraw1Glyph::Proc proc = d1g.init(this, blitter.get(), cache);
-
- while (text < stop) {
- const SkGlyph& glyph = glyphCacheProc(cache, &text, fx, fy);
-
- fx += autokern.adjust(glyph);
-
- if (glyph.fWidth) {
- proc(d1g, glyph, SkFixedFloor(fx), SkFixedFloor(fy));
- }
- fx += glyph.fAdvanceX;
- fy += glyph.fAdvanceY;
- }
-
- if (underlineWidth) {
- autoCache.release(); // release this now to free up the RAM
- handle_aftertext(this, paint, underlineWidth, underlineStart);
- }
-}
-
-// last parameter is interpreted as SkFixed [x, y]
-// return the fixed position, which may be rounded or not by the caller
-// e.g. subpixel doesn't round
-typedef void (*AlignProc)(const SkPoint&, const SkGlyph&, SkIPoint*);
-
-static void leftAlignProc(const SkPoint& loc, const SkGlyph& glyph,
- SkIPoint* dst) {
- dst->set(SkScalarToFixed(loc.fX), SkScalarToFixed(loc.fY));
-}
-
-static void centerAlignProc(const SkPoint& loc, const SkGlyph& glyph,
- SkIPoint* dst) {
- dst->set(SkScalarToFixed(loc.fX) - (glyph.fAdvanceX >> 1),
- SkScalarToFixed(loc.fY) - (glyph.fAdvanceY >> 1));
-}
-
-static void rightAlignProc(const SkPoint& loc, const SkGlyph& glyph,
- SkIPoint* dst) {
- dst->set(SkScalarToFixed(loc.fX) - glyph.fAdvanceX,
- SkScalarToFixed(loc.fY) - glyph.fAdvanceY);
-}
-
-static AlignProc pick_align_proc(SkPaint::Align align) {
- static const AlignProc gProcs[] = {
- leftAlignProc, centerAlignProc, rightAlignProc
- };
-
- SkASSERT((unsigned)align < SK_ARRAY_COUNT(gProcs));
-
- return gProcs[align];
-}
-
-class TextMapState {
-public:
- mutable SkPoint fLoc;
-
- TextMapState(const SkMatrix& matrix, SkScalar y)
- : fMatrix(matrix), fProc(matrix.getMapXYProc()), fY(y) {}
-
- typedef void (*Proc)(const TextMapState&, const SkScalar pos[]);
-
- Proc pickProc(int scalarsPerPosition);
-
-private:
- const SkMatrix& fMatrix;
- SkMatrix::MapXYProc fProc;
- SkScalar fY; // ignored by MapXYProc
- // these are only used by Only... procs
- SkScalar fScaleX, fTransX, fTransformedY;
-
- static void MapXProc(const TextMapState& state, const SkScalar pos[]) {
- state.fProc(state.fMatrix, *pos, state.fY, &state.fLoc);
- }
-
- static void MapXYProc(const TextMapState& state, const SkScalar pos[]) {
- state.fProc(state.fMatrix, pos[0], pos[1], &state.fLoc);
- }
-
- static void MapOnlyScaleXProc(const TextMapState& state,
- const SkScalar pos[]) {
- state.fLoc.set(SkScalarMul(state.fScaleX, *pos) + state.fTransX,
- state.fTransformedY);
- }
-
- static void MapOnlyTransXProc(const TextMapState& state,
- const SkScalar pos[]) {
- state.fLoc.set(*pos + state.fTransX, state.fTransformedY);
- }
-};
-
-TextMapState::Proc TextMapState::pickProc(int scalarsPerPosition) {
- SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition);
-
- if (1 == scalarsPerPosition) {
- unsigned mtype = fMatrix.getType();
- if (mtype & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) {
- return MapXProc;
- } else {
- fScaleX = fMatrix.getScaleX();
- fTransX = fMatrix.getTranslateX();
- fTransformedY = SkScalarMul(fY, fMatrix.getScaleY()) +
- fMatrix.getTranslateY();
- return (mtype & SkMatrix::kScale_Mask) ?
- MapOnlyScaleXProc : MapOnlyTransXProc;
- }
- } else {
- return MapXYProc;
- }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-void SkDraw::drawPosText(const char text[], size_t byteLength,
- const SkScalar pos[], SkScalar constY,
- int scalarsPerPosition, const SkPaint& paint) const {
- SkASSERT(byteLength == 0 || text != NULL);
- SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition);
-
- SkDEBUGCODE(this->validate();)
-
- // nothing to draw
- if (text == NULL || byteLength == 0 ||
- fClip->isEmpty() ||
- (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) {
- return;
- }
-
- if (/*paint.isLinearText() ||*/
- (fMatrix->getType() & SkMatrix::kPerspective_Mask)) {
- // TODO !!!!
-// this->drawText_asPaths(text, byteLength, x, y, paint);
- return;
- }
-
- SkDrawCacheProc glyphCacheProc = paint.getDrawCacheProc();
- SkAutoGlyphCache autoCache(paint, fMatrix);
- SkGlyphCache* cache = autoCache.getCache();
- SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint);
-
- const char* stop = text + byteLength;
- AlignProc alignProc = pick_align_proc(paint.getTextAlign());
- SkDraw1Glyph d1g;
- SkDraw1Glyph::Proc proc = d1g.init(this, blitter.get(), cache);
- TextMapState tms(*fMatrix, constY);
- TextMapState::Proc tmsProc = tms.pickProc(scalarsPerPosition);
-
- if (paint.isSubpixelText()) {
- // maybe we should skip the rounding if linearText is set
- RoundBaseline roundBaseline = computeRoundBaseline(*fMatrix);
-
- if (SkPaint::kLeft_Align == paint.getTextAlign()) {
- while (text < stop) {
- tmsProc(tms, pos);
-
- SkFixed fx = SkScalarToFixed(tms.fLoc.fX);
- SkFixed fy = SkScalarToFixed(tms.fLoc.fY);
-
- if (kRound_Y_Baseline == roundBaseline) {
- fy = (fy + 0x8000) & ~0xFFFF;
- } else if (kRound_X_Baseline == roundBaseline) {
- fx = (fx + 0x8000) & ~0xFFFF;
- }
-
- const SkGlyph& glyph = glyphCacheProc(cache, &text, fx, fy);
-
- if (glyph.fWidth) {
- proc(d1g, glyph, SkFixedFloor(fx), SkFixedFloor(fy));
- }
- pos += scalarsPerPosition;
- }
- } else {
- while (text < stop) {
- const SkGlyph* glyph = &glyphCacheProc(cache, &text, 0, 0);
-
- if (glyph->fWidth) {
- SkDEBUGCODE(SkFixed prevAdvX = glyph->fAdvanceX;)
- SkDEBUGCODE(SkFixed prevAdvY = glyph->fAdvanceY;)
-
- SkFixed fx, fy;
- tmsProc(tms, pos);
-
- {
- SkIPoint fixedLoc;
- alignProc(tms.fLoc, *glyph, &fixedLoc);
- fx = fixedLoc.fX;
- fy = fixedLoc.fY;
-
- if (kRound_Y_Baseline == roundBaseline) {
- fy = (fy + 0x8000) & ~0xFFFF;
- } else if (kRound_X_Baseline == roundBaseline) {
- fx = (fx + 0x8000) & ~0xFFFF;
- }
- }
-
- // have to call again, now that we've been "aligned"
- glyph = &glyphCacheProc(cache, &text, fx, fy);
- // the assumption is that the advance hasn't changed
- SkASSERT(prevAdvX == glyph->fAdvanceX);
- SkASSERT(prevAdvY == glyph->fAdvanceY);
-
- proc(d1g, *glyph, SkFixedFloor(fx), SkFixedFloor(fy));
- }
- pos += scalarsPerPosition;
- }
- }
- } else { // not subpixel
- while (text < stop) {
- // the last 2 parameters are ignored
- const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0);
-
- if (glyph.fWidth) {
- tmsProc(tms, pos);
-
- SkIPoint fixedLoc;
- alignProc(tms.fLoc, glyph, &fixedLoc);
-
- proc(d1g, glyph,
- SkFixedRound(fixedLoc.fX), SkFixedRound(fixedLoc.fY));
- }
- pos += scalarsPerPosition;
- }
- }
-}
-
-#if defined _WIN32 && _MSC_VER >= 1300
-#pragma warning ( pop )
-#endif
-
-///////////////////////////////////////////////////////////////////////////////
-
-#include "SkPathMeasure.h"
-
-static void morphpoints(SkPoint dst[], const SkPoint src[], int count,
- SkPathMeasure& meas, const SkMatrix& matrix) {
- SkMatrix::MapXYProc proc = matrix.getMapXYProc();
-
- for (int i = 0; i < count; i++) {
- SkPoint pos;
- SkVector tangent;
-
- proc(matrix, src[i].fX, src[i].fY, &pos);
- SkScalar sx = pos.fX;
- SkScalar sy = pos.fY;
-
- meas.getPosTan(sx, &pos, &tangent);
-
- /* This is the old way (that explains our approach but is way too slow
- SkMatrix matrix;
- SkPoint pt;
-
- pt.set(sx, sy);
- matrix.setSinCos(tangent.fY, tangent.fX);
- matrix.preTranslate(-sx, 0);
- matrix.postTranslate(pos.fX, pos.fY);
- matrix.mapPoints(&dst[i], &pt, 1);
- */
- dst[i].set(pos.fX - SkScalarMul(tangent.fY, sy),
- pos.fY + SkScalarMul(tangent.fX, sy));
- }
-}
-
-/* TODO
-
- Need differentially more subdivisions when the follow-path is curvy. Not sure how to
- determine that, but we need it. I guess a cheap answer is let the caller tell us,
- but that seems like a cop-out. Another answer is to get Rob Johnson to figure it out.
-*/
-static void morphpath(SkPath* dst, const SkPath& src, SkPathMeasure& meas,
- const SkMatrix& matrix) {
- SkPath::Iter iter(src, false);
- SkPoint srcP[4], dstP[3];
- SkPath::Verb verb;
-
- while ((verb = iter.next(srcP)) != SkPath::kDone_Verb) {
- switch (verb) {
- case SkPath::kMove_Verb:
- morphpoints(dstP, srcP, 1, meas, matrix);
- dst->moveTo(dstP[0]);
- break;
- case SkPath::kLine_Verb:
- // turn lines into quads to look bendy
- srcP[0].fX = SkScalarAve(srcP[0].fX, srcP[1].fX);
- srcP[0].fY = SkScalarAve(srcP[0].fY, srcP[1].fY);
- morphpoints(dstP, srcP, 2, meas, matrix);
- dst->quadTo(dstP[0], dstP[1]);
- break;
- case SkPath::kQuad_Verb:
- morphpoints(dstP, &srcP[1], 2, meas, matrix);
- dst->quadTo(dstP[0], dstP[1]);
- break;
- case SkPath::kCubic_Verb:
- morphpoints(dstP, &srcP[1], 3, meas, matrix);
- dst->cubicTo(dstP[0], dstP[1], dstP[2]);
- break;
- case SkPath::kClose_Verb:
- dst->close();
- break;
- default:
- SkASSERT(!"unknown verb");
- break;
- }
- }
-}
-
-void SkDraw::drawTextOnPath(const char text[], size_t byteLength,
- const SkPath& follow, const SkMatrix* matrix,
- const SkPaint& paint) const {
- SkASSERT(byteLength == 0 || text != NULL);
-
- // nothing to draw
- if (text == NULL || byteLength == 0 ||
- fClip->isEmpty() ||
- (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) {
- return;
- }
-
- SkTextToPathIter iter(text, byteLength, paint, true, true);
- SkPathMeasure meas(follow, false);
- SkScalar hOffset = 0;
-
- // need to measure first
- if (paint.getTextAlign() != SkPaint::kLeft_Align) {
- SkScalar pathLen = meas.getLength();
- if (paint.getTextAlign() == SkPaint::kCenter_Align) {
- pathLen = SkScalarHalf(pathLen);
- }
- hOffset += pathLen;
- }
-
- const SkPath* iterPath;
- SkScalar xpos;
- SkMatrix scaledMatrix;
- SkScalar scale = iter.getPathScale();
-
- scaledMatrix.setScale(scale, scale);
-
- while ((iterPath = iter.next(&xpos)) != NULL) {
- SkPath tmp;
- SkMatrix m(scaledMatrix);
-
- m.postTranslate(xpos + hOffset, 0);
- if (matrix) {
- m.postConcat(*matrix);
- }
- morphpath(&tmp, *iterPath, meas, m);
- this->drawPath(tmp, iter.getPaint());
- }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-struct VertState {
- int f0, f1, f2;
-
- VertState(int vCount, const uint16_t indices[], int indexCount)
- : fIndices(indices) {
- fCurrIndex = 0;
- if (indices) {
- fCount = indexCount;
- } else {
- fCount = vCount;
- }
- }
-
- typedef bool (*Proc)(VertState*);
- Proc chooseProc(SkCanvas::VertexMode mode);
-
-private:
- int fCount;
- int fCurrIndex;
- const uint16_t* fIndices;
-
- static bool Triangles(VertState*);
- static bool TrianglesX(VertState*);
- static bool TriangleStrip(VertState*);
- static bool TriangleStripX(VertState*);
- static bool TriangleFan(VertState*);
- static bool TriangleFanX(VertState*);
-};
-
-bool VertState::Triangles(VertState* state) {
- int index = state->fCurrIndex;
- if (index + 3 > state->fCount) {
- return false;
- }
- state->f0 = index + 0;
- state->f1 = index + 1;
- state->f2 = index + 2;
- state->fCurrIndex = index + 3;
- return true;
-}
-
-bool VertState::TrianglesX(VertState* state) {
- const uint16_t* indices = state->fIndices;
- int index = state->fCurrIndex;
- if (index + 3 > state->fCount) {
- return false;
- }
- state->f0 = indices[index + 0];
- state->f1 = indices[index + 1];
- state->f2 = indices[index + 2];
- state->fCurrIndex = index + 3;
- return true;
-}
-
-bool VertState::TriangleStrip(VertState* state) {
- int index = state->fCurrIndex;
- if (index + 3 > state->fCount) {
- return false;
- }
- state->f2 = index + 2;
- if (index & 1) {
- state->f0 = index + 1;
- state->f1 = index + 0;
- } else {
- state->f0 = index + 0;
- state->f1 = index + 1;
- }
- state->fCurrIndex = index + 1;
- return true;
-}
-
-bool VertState::TriangleStripX(VertState* state) {
- const uint16_t* indices = state->fIndices;
- int index = state->fCurrIndex;
- if (index + 3 > state->fCount) {
- return false;
- }
- state->f2 = indices[index + 2];
- if (index & 1) {
- state->f0 = indices[index + 1];
- state->f1 = indices[index + 0];
- } else {
- state->f0 = indices[index + 0];
- state->f1 = indices[index + 1];
- }
- state->fCurrIndex = index + 1;
- return true;
-}
-
-bool VertState::TriangleFan(VertState* state) {
- int index = state->fCurrIndex;
- if (index + 3 > state->fCount) {
- return false;
- }
- state->f0 = 0;
- state->f1 = index + 1;
- state->f2 = index + 2;
- state->fCurrIndex = index + 1;
- return true;
-}
-
-bool VertState::TriangleFanX(VertState* state) {
- const uint16_t* indices = state->fIndices;
- int index = state->fCurrIndex;
- if (index + 3 > state->fCount) {
- return false;
- }
- state->f0 = indices[0];
- state->f1 = indices[index + 1];
- state->f2 = indices[index + 2];
- state->fCurrIndex = index + 1;
- return true;
-}
-
-VertState::Proc VertState::chooseProc(SkCanvas::VertexMode mode) {
- switch (mode) {
- case SkCanvas::kTriangles_VertexMode:
- return fIndices ? TrianglesX : Triangles;
- case SkCanvas::kTriangleStrip_VertexMode:
- return fIndices ? TriangleStripX : TriangleStrip;
- case SkCanvas::kTriangleFan_VertexMode:
- return fIndices ? TriangleFanX : TriangleFan;
- default:
- return NULL;
- }
-}
-
-typedef void (*HairProc)(const SkPoint&, const SkPoint&, const SkRegion*,
- SkBlitter*);
-
-static HairProc ChooseHairProc(bool doAntiAlias) {
- return doAntiAlias ? SkScan::AntiHairLine : SkScan::HairLine;
-}
-
-static bool texture_to_matrix(const VertState& state, const SkPoint verts[],
- const SkPoint texs[], SkMatrix* matrix) {
- SkPoint src[3], dst[3];
-
- src[0] = texs[state.f0];
- src[1] = texs[state.f1];
- src[2] = texs[state.f2];
- dst[0] = verts[state.f0];
- dst[1] = verts[state.f1];
- dst[2] = verts[state.f2];
- return matrix->setPolyToPoly(src, dst, 3);
-}
-
-class SkTriColorShader : public SkShader {
-public:
- SkTriColorShader() {}
-
- bool setup(const SkPoint pts[], const SkColor colors[], int, int, int);
-
- virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count);
-
-protected:
- SkTriColorShader(SkFlattenableReadBuffer& buffer) : SkShader(buffer) {}
-
- virtual Factory getFactory() { return CreateProc; }
-
-private:
- SkMatrix fDstToUnit;
- SkPMColor fColors[3];
-
- static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
- return SkNEW_ARGS(SkTriColorShader, (buffer));
- }
- typedef SkShader INHERITED;
-};
-
-bool SkTriColorShader::setup(const SkPoint pts[], const SkColor colors[],
- int index0, int index1, int index2) {
-
- fColors[0] = SkPreMultiplyColor(colors[index0]);
- fColors[1] = SkPreMultiplyColor(colors[index1]);
- fColors[2] = SkPreMultiplyColor(colors[index2]);
-
- SkMatrix m, im;
- m.reset();
- m.set(0, pts[index1].fX - pts[index0].fX);
- m.set(1, pts[index2].fX - pts[index0].fX);
- m.set(2, pts[index0].fX);
- m.set(3, pts[index1].fY - pts[index0].fY);
- m.set(4, pts[index2].fY - pts[index0].fY);
- m.set(5, pts[index0].fY);
- if (!m.invert(&im)) {
- return false;
- }
- return fDstToUnit.setConcat(im, this->getTotalInverse());
-}
-
-#include "SkColorPriv.h"
-#include "SkPorterDuff.h"
-#include "SkShaderExtras.h"
-#include "SkXfermode.h"
-
-static int ScalarTo256(SkScalar v) {
- int scale = SkScalarToFixed(v) >> 8;
- if (scale < 0) {
- scale = 0;
- }
- if (scale > 255) {
- scale = 255;
- }
- return SkAlpha255To256(scale);
-}
-
-void SkTriColorShader::shadeSpan(int x, int y, SkPMColor dstC[], int count) {
- SkPoint src;
-
- for (int i = 0; i < count; i++) {
- fDstToUnit.mapXY(SkIntToScalar(x), SkIntToScalar(y), &src);
- x += 1;
-
- int scale1 = ScalarTo256(src.fX);
- int scale2 = ScalarTo256(src.fY);
- int scale0 = 256 - scale1 - scale2;
- if (scale0 < 0) {
- if (scale1 > scale2) {
- scale2 = 256 - scale1;
- } else {
- scale1 = 256 - scale2;
- }
- scale0 = 0;
- }
-
- dstC[i] = SkAlphaMulQ(fColors[0], scale0) +
- SkAlphaMulQ(fColors[1], scale1) +
- SkAlphaMulQ(fColors[2], scale2);
- }
-}
-
-void SkDraw::drawVertices(SkCanvas::VertexMode vmode, int count,
- const SkPoint vertices[], const SkPoint textures[],
- const SkColor colors[], SkXfermode* xmode,
- const uint16_t indices[], int indexCount,
- const SkPaint& paint) const {
- SkASSERT(0 == count || NULL != vertices);
-
- // abort early if there is nothing to draw
- if (count < 3 || (indices && indexCount < 3) || fClip->isEmpty() ||
- (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) {
- return;
- }
-
- // transform out vertices into device coordinates
- SkAutoSTMalloc<16, SkPoint> storage(count);
- SkPoint* devVerts = storage.get();
- fMatrix->mapPoints(devVerts, vertices, count);
-
- if (fBounder) {
- SkRect bounds;
- bounds.set(devVerts, count);
- if (!fBounder->doRect(bounds, paint)) {
- return;
- }
- }
-
- /*
- We can draw the vertices in 1 of 4 ways:
-
- - solid color (no shader/texture[], no colors[])
- - just colors (no shader/texture[], has colors[])
- - just texture (has shader/texture[], no colors[])
- - colors * texture (has shader/texture[], has colors[])
-
- Thus for texture drawing, we need both texture[] and a shader.
- */
-
- SkTriColorShader triShader; // must be above declaration of p
- SkPaint p(paint);
-
- SkShader* shader = p.getShader();
- if (NULL == shader) {
- // if we have no shader, we ignore the texture coordinates
- textures = NULL;
- } else if (NULL == textures) {
- // if we don't have texture coordinates, ignore the shader
- p.setShader(NULL);
- shader = NULL;
- }
-
- // setup the custom shader (if needed)
- if (NULL != colors) {
- if (NULL == textures) {
- // just colors (no texture)
- p.setShader(&triShader);
- } else {
- // colors * texture
- SkASSERT(shader);
- bool releaseMode = false;
- if (NULL == xmode) {
- xmode = SkPorterDuff::CreateXfermode(
- SkPorterDuff::kMultiply_Mode);
- releaseMode = true;
- }
- SkShader* compose = SkNEW_ARGS(SkComposeShader,
- (&triShader, shader, xmode));
- p.setShader(compose)->unref();
- if (releaseMode) {
- xmode->unref();
- }
- }
- }
-
- SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, p);
- // setup our state and function pointer for iterating triangles
- VertState state(count, indices, indexCount);
- VertState::Proc vertProc = state.chooseProc(vmode);
-
- if (NULL != textures || NULL != colors) {
- SkMatrix localM, tempM;
- bool hasLocalM = shader && shader->getLocalMatrix(&localM);
-
- if (NULL != colors) {
- if (!triShader.setContext(*fBitmap, p, *fMatrix)) {
- colors = NULL;
- }
- }
-
- while (vertProc(&state)) {
- if (NULL != textures) {
- if (texture_to_matrix(state, vertices, textures, &tempM)) {
- if (hasLocalM) {
- tempM.postConcat(localM);
- }
- shader->setLocalMatrix(tempM);
- // need to recal setContext since we changed the local matrix
- if (!shader->setContext(*fBitmap, p, *fMatrix)) {
- continue;
- }
- }
- }
- if (NULL != colors) {
- if (!triShader.setup(vertices, colors,
- state.f0, state.f1, state.f2)) {
- continue;
- }
- }
- SkScan::FillTriangle(devVerts[state.f0], devVerts[state.f1],
- devVerts[state.f2], fClip, blitter.get());
- }
- // now restore the shader's original local matrix
- if (NULL != shader) {
- if (hasLocalM) {
- shader->setLocalMatrix(localM);
- } else {
- shader->resetLocalMatrix();
- }
- }
- } else {
- // no colors[] and no texture
- HairProc hairProc = ChooseHairProc(paint.isAntiAlias());
- while (vertProc(&state)) {
- hairProc(devVerts[state.f0], devVerts[state.f1], fClip, blitter.get());
- hairProc(devVerts[state.f1], devVerts[state.f2], fClip, blitter.get());
- hairProc(devVerts[state.f2], devVerts[state.f0], fClip, blitter.get());
- }
- }
-}
-
-////////////////////////////////////////////////////////////////////////////////////////
-////////////////////////////////////////////////////////////////////////////////////////
-
-#ifdef SK_DEBUG
-
-void SkDraw::validate() const {
- SkASSERT(fBitmap != NULL);
- SkASSERT(fMatrix != NULL);
- SkASSERT(fClip != NULL);
-
- const SkIRect& cr = fClip->getBounds();
- SkIRect br;
-
- br.set(0, 0, fBitmap->width(), fBitmap->height());
- SkASSERT(cr.isEmpty() || br.contains(cr));
-}
-
-#endif
-
-//////////////////////////////////////////////////////////////////////////////////////////
-
-bool SkBounder::doIRect(const SkIRect& r) {
- SkIRect rr;
- return rr.intersect(fClip->getBounds(), r) && this->onIRect(rr);
-}
-
-bool SkBounder::doHairline(const SkPoint& pt0, const SkPoint& pt1,
- const SkPaint& paint) {
- SkIRect r;
- SkScalar v0, v1;
-
- v0 = pt0.fX;
- v1 = pt1.fX;
- if (v0 > v1) {
- SkTSwap<SkScalar>(v0, v1);
- }
- r.fLeft = SkScalarFloor(v0);
- r.fRight = SkScalarCeil(v1);
-
- v0 = pt0.fY;
- v1 = pt1.fY;
- if (v0 > v1) {
- SkTSwap<SkScalar>(v0, v1);
- }
- r.fTop = SkScalarFloor(v0);
- r.fBottom = SkScalarCeil(v1);
-
- if (paint.isAntiAlias()) {
- r.inset(-1, -1);
- }
- return this->doIRect(r);
-}
-
-bool SkBounder::doRect(const SkRect& rect, const SkPaint& paint) {
- SkIRect r;
-
- if (paint.getStyle() == SkPaint::kFill_Style) {
- rect.round(&r);
- } else {
- int rad = -1;
- rect.roundOut(&r);
- if (paint.isAntiAlias()) {
- rad = -2;
- }
- r.inset(rad, rad);
- }
- return this->doIRect(r);
-}
-
-bool SkBounder::doPath(const SkPath& path, const SkPaint& paint, bool doFill) {
- SkRect bounds;
- SkIRect r;
-
- path.computeBounds(&bounds, SkPath::kFast_BoundsType);
-
- if (doFill) {
- bounds.round(&r);
- } else { // hairline
- bounds.roundOut(&r);
- }
-
- if (paint.isAntiAlias()) {
- r.inset(-1, -1);
- }
- return this->doIRect(r);
-}
-
-void SkBounder::commit() {
- // override in subclass
-}
-
-////////////////////////////////////////////////////////////////////////////////////////////////
-
-#include "SkPath.h"
-#include "SkDraw.h"
-#include "SkRegion.h"
-#include "SkBlitter.h"
-
-static bool compute_bounds(const SkPath& devPath, const SkIRect* clipBounds,
- SkMaskFilter* filter, const SkMatrix* filterMatrix,
- SkIRect* bounds) {
- if (devPath.isEmpty()) {
- return false;
- }
-
- SkIPoint margin;
- margin.set(0, 0);
-
- // init our bounds from the path
- {
- SkRect pathBounds;
- devPath.computeBounds(&pathBounds, SkPath::kExact_BoundsType);
- pathBounds.inset(-SK_ScalarHalf, -SK_ScalarHalf);
- pathBounds.roundOut(bounds);
- }
-
- if (filter) {
- SkASSERT(filterMatrix);
-
- SkMask srcM, dstM;
-
- srcM.fBounds = *bounds;
- srcM.fFormat = SkMask::kA8_Format;
- srcM.fImage = NULL;
- if (!filter->filterMask(&dstM, srcM, *filterMatrix, &margin)) {
- return false;
- }
- *bounds = dstM.fBounds;
- }
-
- if (clipBounds && !SkIRect::Intersects(*clipBounds, *bounds)) {
- return false;
- }
-
- // (possibly) trim the srcM bounds to reflect the clip
- // (plus whatever slop the filter needs)
- if (clipBounds && !clipBounds->contains(*bounds)) {
- SkIRect tmp = *bounds;
- (void)tmp.intersect(*clipBounds);
- tmp.inset(-margin.fX, -margin.fY);
- (void)bounds->intersect(tmp);
- }
-
- return true;
-}
-
-static void draw_into_mask(const SkMask& mask, const SkPath& devPath) {
- SkBitmap bm;
- SkDraw draw;
- SkRegion clipRgn;
- SkMatrix matrix;
- SkPaint paint;
-
- bm.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(), mask.fBounds.height(), mask.fRowBytes);
- bm.setPixels(mask.fImage);
-
- clipRgn.setRect(0, 0, mask.fBounds.width(), mask.fBounds.height());
- matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft),
- -SkIntToScalar(mask.fBounds.fTop));
-
- draw.fBitmap = &bm;
- draw.fClip = &clipRgn;
- draw.fMatrix = &matrix;
- draw.fBounder = NULL;
- paint.setAntiAlias(true);
- draw.drawPath(devPath, paint);
-}
-
-bool SkDraw::DrawToMask(const SkPath& devPath, const SkIRect* clipBounds,
- SkMaskFilter* filter, const SkMatrix* filterMatrix,
- SkMask* mask, SkMask::CreateMode mode) {
- if (SkMask::kJustRenderImage_CreateMode != mode) {
- if (!compute_bounds(devPath, clipBounds, filter, filterMatrix, &mask->fBounds))
- return false;
- }
-
- if (SkMask::kComputeBoundsAndRenderImage_CreateMode == mode) {
- mask->fFormat = SkMask::kA8_Format;
- mask->fRowBytes = mask->fBounds.width();
- size_t size = mask->computeImageSize();
- if (0 == size) {
- // we're too big to allocate the mask, abort
- return false;
- }
- mask->fImage = SkMask::AllocImage(size);
- memset(mask->fImage, 0, mask->computeImageSize());
- }
-
- if (SkMask::kJustComputeBounds_CreateMode != mode) {
- draw_into_mask(*mask, devPath);
- }
-
- return true;
-}
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