/*
* Copyright (C) 2011 Google Inc.
*
* 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 "SkPDFShader.h"
#include "SkCanvas.h"
#include "SkPDFCatalog.h"
#include "SkPDFDevice.h"
#include "SkPDFTypes.h"
#include "SkPDFUtils.h"
#include "SkScalar.h"
#include "SkStream.h"
#include "SkTemplates.h"
#include "SkThread.h"
#include "SkTypes.h"
static void transformBBox(const SkMatrix& matrix, SkRect* bbox) {
SkMatrix inverse;
inverse.reset();
matrix.invert(&inverse);
inverse.mapRect(bbox);
}
static void unitToPointsMatrix(const SkPoint pts[2], SkMatrix* matrix) {
SkVector vec = pts[1] - pts[0];
SkScalar mag = vec.length();
SkScalar inv = mag ? SkScalarInvert(mag) : 0;
vec.scale(inv);
matrix->setSinCos(vec.fY, vec.fX);
matrix->preTranslate(pts[0].fX, pts[0].fY);
matrix->preScale(mag, mag);
}
/* Assumes t + startOffset is on the stack and does a linear interpolation on t
between startOffset and endOffset from prevColor to curColor (for each color
component), leaving the result in component order on the stack.
@param range endOffset - startOffset
@param curColor[components] The current color components.
@param prevColor[components] The previous color components.
@param result The result ps function.
*/
static void interpolateColorCode(SkScalar range, SkScalar* curColor,
SkScalar* prevColor, int components,
SkString* result) {
// Figure out how to scale each color component.
SkAutoSTMalloc<4, SkScalar> multiplierAlloc(components);
SkScalar *multiplier = multiplierAlloc.get();
for (int i = 0; i < components; i++) {
multiplier[i] = SkScalarDiv(curColor[i] - prevColor[i], range);
}
// Calculate when we no longer need to keep a copy of the input parameter t.
// If the last component to use t is i, then dupInput[0..i - 1] = true
// and dupInput[i .. components] = false.
SkAutoSTMalloc<4, bool> dupInputAlloc(components);
bool *dupInput = dupInputAlloc.get();
dupInput[components - 1] = false;
for (int i = components - 2; i >= 0; i--) {
dupInput[i] = dupInput[i + 1] || multiplier[i + 1] != 0;
}
if (!dupInput[0] && multiplier[0] == 0) {
result->append("pop ");
}
for (int i = 0; i < components; i++) {
// If the next components needs t, make a copy.
if (dupInput[i]) {
result->append("dup ");
}
if (multiplier[i] == 0) {
result->appendScalar(prevColor[i]);
result->append(" ");
} else {
if (multiplier[i] != 1) {
result->appendScalar(multiplier[i]);
result->append(" mul ");
}
if (prevColor[i] != 0) {
result->appendScalar(prevColor[i]);
result->append(" add ");
}
}
if (dupInput[i]) {
result->append("exch\n");
}
}
}
/* Generate Type 4 function code to map t=[0,1) to the passed gradient,
clamping at the edges of the range. The generated code will be of the form:
if (t < 0) {
return colorData[0][r,g,b];
} else {
if (t < info.fColorOffsets[1]) {
return linearinterpolation(colorData[0][r,g,b],
colorData[1][r,g,b]);
} else {
if (t < info.fColorOffsets[2]) {
return linearinterpolation(colorData[1][r,g,b],
colorData[2][r,g,b]);
} else {
... } else {
return colorData[info.fColorCount - 1][r,g,b];
}
...
}
}
*/
static void gradientFunctionCode(const SkShader::GradientInfo& info,
SkString* result) {
/* We want to linearly interpolate from the previous color to the next.
Scale the colors from 0..255 to 0..1 and determine the multipliers
for interpolation.
C{r,g,b}(t, section) = t - offset_(section-1) + t * Multiplier{r,g,b}.
*/
static const int kColorComponents = 3;
typedef SkScalar ColorTuple[kColorComponents];
SkAutoSTMalloc<4, ColorTuple> colorDataAlloc(info.fColorCount);
ColorTuple *colorData = colorDataAlloc.get();
const SkScalar scale = SkScalarInvert(SkIntToScalar(255));
for (int i = 0; i < info.fColorCount; i++) {
colorData[i][0] = SkScalarMul(SkColorGetR(info.fColors[i]), scale);
colorData[i][1] = SkScalarMul(SkColorGetG(info.fColors[i]), scale);
colorData[i][2] = SkScalarMul(SkColorGetB(info.fColors[i]), scale);
}
// Clamp the initial color.
result->append("dup 0 le {pop ");
result->appendScalar(colorData[0][0]);
result->append(" ");
result->appendScalar(colorData[0][1]);
result->append(" ");
result->appendScalar(colorData[0][2]);
result->append(" }\n");
// The gradient colors.
for (int i = 1 ; i < info.fColorCount; i++) {
result->append("{dup ");
result->appendScalar(info.fColorOffsets[i]);
result->append(" le {");
if (info.fColorOffsets[i - 1] != 0) {
result->appendScalar(info.fColorOffsets[i - 1]);
result->append(" sub\n");
}
interpolateColorCode(info.fColorOffsets[i] - info.fColorOffsets[i - 1],
colorData[i], colorData[i - 1], kColorComponents,
result);
result->append("}\n");
}
// Clamp the final color.
result->append("{pop ");
result->appendScalar(colorData[info.fColorCount - 1][0]);
result->append(" ");
result->appendScalar(colorData[info.fColorCount - 1][1]);
result->append(" ");
result->appendScalar(colorData[info.fColorCount - 1][2]);
for (int i = 0 ; i < info.fColorCount; i++) {
result->append("} ifelse\n");
}
}
/* Map a value of t on the stack into [0, 1) for Repeat or Mirror tile mode. */
static void tileModeCode(SkShader::TileMode mode, SkString* result) {
if (mode == SkShader::kRepeat_TileMode) {
result->append("dup truncate sub\n"); // Get the fractional part.
result->append("dup 0 le {1 add} if\n"); // Map (-1,0) => (0,1)
return;
}
if (mode == SkShader::kMirror_TileMode) {
// Map t mod 2 into [0, 1, 1, 0].
// Code Stack
result->append("abs " // Map negative to positive.
"dup " // t.s t.s
"truncate " // t.s t
"dup " // t.s t t
"cvi " // t.s t T
"2 mod " // t.s t (i mod 2)
"1 eq " // t.s t true|false
"3 1 roll " // true|false t.s t
"sub " // true|false 0.s
"exch " // 0.s true|false
"{1 exch sub} if\n"); // 1 - 0.s|0.s
}
}
static SkString linearCode(const SkShader::GradientInfo& info) {
SkString function("{pop\n"); // Just ditch the y value.
tileModeCode(info.fTileMode, &function);
gradientFunctionCode(info, &function);
function.append("}");
return function;
}
static SkString radialCode(const SkShader::GradientInfo& info) {
SkString function("{");
// Find the distance from the origin.
function.append("dup " // x y y
"mul " // x y^2
"exch " // y^2 x
"dup " // y^2 x x
"mul " // y^2 x^2
"add " // y^2+x^2
"sqrt\n"); // sqrt(y^2+x^2)
tileModeCode(info.fTileMode, &function);
gradientFunctionCode(info, &function);
function.append("}");
return function;
}
/* The math here is all based on the description in Two_Point_Radial_Gradient,
with one simplification, the coordinate space has been scaled so that
Dr = 1. This means we don't need to scale the entire equation by 1/Dr^2.
*/
static SkString twoPointRadialCode(const SkShader::GradientInfo& info) {
SkScalar dx = info.fPoint[0].fX - info.fPoint[1].fX;
SkScalar dy = info.fPoint[0].fY - info.fPoint[1].fY;
SkScalar sr = info.fRadius[0];
SkScalar a = SkScalarMul(dx, dx) + SkScalarMul(dy, dy) - SK_Scalar1;
bool posRoot = info.fRadius[1] > info.fRadius[0];
// We start with a stack of (x y), copy it and then consume one copy in
// order to calculate b and the other to calculate c.
SkString function("{");
function.append("2 copy ");
// Calculate -b and b^2.
function.appendScalar(dy);
function.append(" mul exch ");
function.appendScalar(dx);
function.append(" mul add ");
function.appendScalar(sr);
function.append(" sub 2 mul neg dup dup mul\n");
// Calculate c
function.append("4 2 roll dup mul exch dup mul add ");
function.appendScalar(SkScalarMul(sr, sr));
function.append(" sub\n");
// Calculate the determinate
function.appendScalar(SkScalarMul(SkIntToScalar(4), a));
function.append(" mul sub abs sqrt\n");
// And then the final value of t.
if (posRoot) {
function.append("sub ");
} else {
function.append("add ");
}
function.appendScalar(SkScalarMul(SkIntToScalar(2), a));
function.append(" div\n");
tileModeCode(info.fTileMode, &function);
gradientFunctionCode(info, &function);
function.append("}");
return function;
}
static SkString sweepCode(const SkShader::GradientInfo& info) {
SkString function("{exch atan 360 div\n");
tileModeCode(info.fTileMode, &function);
gradientFunctionCode(info, &function);
function.append("}");
return function;
}
SkPDFShader::~SkPDFShader() {
SkAutoMutexAcquire lock(canonicalShadersMutex());
ShaderCanonicalEntry entry(this, fState.get());
int index = canonicalShaders().find(entry);
SkASSERT(index >= 0);
canonicalShaders().removeShuffle(index);
fResources.unrefAll();
}
void SkPDFShader::emitObject(SkWStream* stream, SkPDFCatalog* catalog,
bool indirect) {
if (indirect)
return emitIndirectObject(stream, catalog);
fContent->emitObject(stream, catalog, indirect);
}
size_t SkPDFShader::getOutputSize(SkPDFCatalog* catalog, bool indirect) {
if (indirect)
return getIndirectOutputSize(catalog);
return fContent->getOutputSize(catalog, indirect);
}
void SkPDFShader::getResources(SkTDArray<SkPDFObject*>* resourceList) {
resourceList->setReserve(resourceList->count() + fResources.count());
for (int i = 0; i < fResources.count(); i++) {
resourceList->push(fResources[i]);
fResources[i]->ref();
}
}
// static
SkPDFShader* SkPDFShader::getPDFShader(const SkShader& shader,
const SkMatrix& matrix,
const SkIRect& surfaceBBox) {
SkRefPtr<SkPDFShader> pdfShader;
SkAutoMutexAcquire lock(canonicalShadersMutex());
SkAutoTDelete<State> shaderState(new State(shader, matrix, surfaceBBox));
ShaderCanonicalEntry entry(NULL, shaderState.get());
int index = canonicalShaders().find(entry);
if (index >= 0) {
SkPDFShader* result = canonicalShaders()[index].fPDFShader;
result->ref();
return result;
}
// The PDFShader takes ownership of the shaderSate.
pdfShader = new SkPDFShader(shaderState.detach());
// Check for a valid shader.
if (pdfShader->fContent.get() == NULL) {
pdfShader->unref();
return NULL;
}
entry.fPDFShader = pdfShader.get();
canonicalShaders().push(entry);
return pdfShader.get(); // return the reference that came from new.
}
// static
SkTDArray<SkPDFShader::ShaderCanonicalEntry>& SkPDFShader::canonicalShaders() {
// This initialization is only thread safe with gcc.
static SkTDArray<ShaderCanonicalEntry> gCanonicalShaders;
return gCanonicalShaders;
}
// static
SkMutex& SkPDFShader::canonicalShadersMutex() {
// This initialization is only thread safe with gcc.
static SkMutex gCanonicalShadersMutex;
return gCanonicalShadersMutex;
}
// static
SkPDFObject* SkPDFShader::rangeObject() {
// This initialization is only thread safe with gcc.
static SkPDFArray* range = NULL;
// This method is only used with canonicalShadersMutex, so it's safe to
// populate domain.
if (range == NULL) {
range = new SkPDFArray;
range->reserve(6);
range->append(new SkPDFInt(0))->unref();
range->append(new SkPDFInt(1))->unref();
range->append(new SkPDFInt(0))->unref();
range->append(new SkPDFInt(1))->unref();
range->append(new SkPDFInt(0))->unref();
range->append(new SkPDFInt(1))->unref();
}
return range;
}
SkPDFShader::SkPDFShader(State* state) : fState(state) {
if (fState.get()->fType == SkShader::kNone_GradientType) {
doImageShader();
} else {
doFunctionShader();
}
}
void SkPDFShader::doFunctionShader() {
SkString (*codeFunction)(const SkShader::GradientInfo& info) = NULL;
SkPoint transformPoints[2];
// Depending on the type of the gradient, we want to transform the
// coordinate space in different ways.
const SkShader::GradientInfo* info = &fState.get()->fInfo;
transformPoints[0] = info->fPoint[0];
transformPoints[1] = info->fPoint[1];
switch (fState.get()->fType) {
case SkShader::kLinear_GradientType:
codeFunction = &linearCode;
break;
case SkShader::kRadial_GradientType:
transformPoints[1] = transformPoints[0];
transformPoints[1].fX += info->fRadius[0];
codeFunction = &radialCode;
break;
case SkShader::kRadial2_GradientType: {
// Bail out if the radii are the same. Not setting fContent will
// cause the higher level code to detect the resulting object
// as invalid.
if (info->fRadius[0] == info->fRadius[1]) {
return;
}
transformPoints[1] = transformPoints[0];
SkScalar dr = info->fRadius[1] - info->fRadius[0];
transformPoints[1].fX += dr;
codeFunction = &twoPointRadialCode;
break;
}
case SkShader::kSweep_GradientType:
transformPoints[1] = transformPoints[0];
transformPoints[1].fX += 1;
codeFunction = &sweepCode;
break;
case SkShader::kColor_GradientType:
case SkShader::kNone_GradientType:
SkASSERT(false);
return;
}
// Move any scaling (assuming a unit gradient) or translation
// (and rotation for linear gradient), of the final gradient from
// info->fPoints to the matrix (updating bbox appropriately). Now
// the gradient can be drawn on on the unit segment.
SkMatrix mapperMatrix;
unitToPointsMatrix(transformPoints, &mapperMatrix);
SkMatrix finalMatrix = fState.get()->fCanvasTransform;
finalMatrix.preConcat(mapperMatrix);
finalMatrix.preConcat(fState.get()->fShaderTransform);
SkRect bbox;
bbox.set(fState.get()->fBBox);
transformBBox(finalMatrix, &bbox);
SkRefPtr<SkPDFArray> domain = new SkPDFArray;
domain->unref(); // SkRefPtr and new both took a reference.
domain->reserve(4);
domain->append(new SkPDFScalar(bbox.fLeft))->unref();
domain->append(new SkPDFScalar(bbox.fRight))->unref();
domain->append(new SkPDFScalar(bbox.fTop))->unref();
domain->append(new SkPDFScalar(bbox.fBottom))->unref();
SkString functionCode;
// The two point radial gradient further references fState.get()->fInfo
// in translating from x, y coordinates to the t parameter. So, we have
// to transform the points and radii according to the calculated matrix.
if (fState.get()->fType == SkShader::kRadial2_GradientType) {
SkShader::GradientInfo twoPointRadialInfo = *info;
SkMatrix inverseMapperMatrix;
mapperMatrix.invert(&inverseMapperMatrix);
inverseMapperMatrix.mapPoints(twoPointRadialInfo.fPoint, 2);
twoPointRadialInfo.fRadius[0] =
inverseMapperMatrix.mapRadius(info->fRadius[0]);
twoPointRadialInfo.fRadius[1] =
inverseMapperMatrix.mapRadius(info->fRadius[1]);
functionCode = codeFunction(twoPointRadialInfo);
} else {
functionCode = codeFunction(*info);
}
SkRefPtr<SkPDFStream> function = makePSFunction(functionCode, domain.get());
// Pass one reference to fResources, SkRefPtr and new both took a reference.
fResources.push(function.get());
SkRefPtr<SkPDFDict> pdfShader = new SkPDFDict;
pdfShader->unref(); // SkRefPtr and new both took a reference.
pdfShader->insert("ShadingType", new SkPDFInt(1))->unref();
pdfShader->insert("ColorSpace", new SkPDFName("DeviceRGB"))->unref();
pdfShader->insert("Domain", domain.get());
pdfShader->insert("Function", new SkPDFObjRef(function.get()))->unref();
fContent = new SkPDFDict("Pattern");
fContent->unref(); // SkRefPtr and new both took a reference.
fContent->insert("PatternType", new SkPDFInt(2))->unref();
fContent->insert("Matrix", SkPDFUtils::MatrixToArray(finalMatrix))->unref();
fContent->insert("Shading", pdfShader.get());
}
// SkShader* shader, SkMatrix matrix, const SkRect& surfaceBBox
void SkPDFShader::doImageShader() {
fState.get()->fImage.lockPixels();
SkMatrix finalMatrix = fState.get()->fCanvasTransform;
finalMatrix.preConcat(fState.get()->fShaderTransform);
SkRect surfaceBBox;
surfaceBBox.set(fState.get()->fBBox);
transformBBox(finalMatrix, &surfaceBBox);
SkMatrix unflip;
unflip.setTranslate(0, SkScalarRound(surfaceBBox.height()));
unflip.preScale(1, -1);
SkISize size = SkISize::Make(SkScalarRound(surfaceBBox.width()),
SkScalarRound(surfaceBBox.height()));
SkPDFDevice pattern(size, size, unflip);
SkCanvas canvas(&pattern);
canvas.translate(-surfaceBBox.fLeft, -surfaceBBox.fTop);
finalMatrix.preTranslate(surfaceBBox.fLeft, surfaceBBox.fTop);
const SkBitmap* image = &fState.get()->fImage;
int width = image->width();
int height = image->height();
SkShader::TileMode tileModes[2];
tileModes[0] = fState.get()->fImageTileModes[0];
tileModes[1] = fState.get()->fImageTileModes[1];
canvas.drawBitmap(*image, 0, 0);
SkRect patternBBox = SkRect::MakeXYWH(-surfaceBBox.fLeft, -surfaceBBox.fTop,
width, height);
// Tiling is implied. First we handle mirroring.
if (tileModes[0] == SkShader::kMirror_TileMode) {
SkMatrix xMirror;
xMirror.setScale(-1, 1);
xMirror.postTranslate(2 * width, 0);
canvas.drawBitmapMatrix(*image, xMirror);
patternBBox.fRight += width;
}
if (tileModes[1] == SkShader::kMirror_TileMode) {
SkMatrix yMirror;
yMirror.setScale(1, -1);
yMirror.postTranslate(0, 2 * height);
canvas.drawBitmapMatrix(*image, yMirror);
patternBBox.fBottom += height;
}
if (tileModes[0] == SkShader::kMirror_TileMode &&
tileModes[1] == SkShader::kMirror_TileMode) {
SkMatrix mirror;
mirror.setScale(-1, -1);
mirror.postTranslate(2 * width, 2 * height);
canvas.drawBitmapMatrix(*image, mirror);
}
// Then handle Clamping, which requires expanding the pattern canvas to
// cover the entire surfaceBBox.
// If both x and y are in clamp mode, we start by filling in the corners.
// (Which are just a rectangles of the corner colors.)
if (tileModes[0] == SkShader::kClamp_TileMode &&
tileModes[1] == SkShader::kClamp_TileMode) {
SkPaint paint;
SkRect rect;
rect = SkRect::MakeLTRB(surfaceBBox.fLeft, surfaceBBox.fTop, 0, 0);
if (!rect.isEmpty()) {
paint.setColor(image->getColor(0, 0));
canvas.drawRect(rect, paint);
}
rect = SkRect::MakeLTRB(width, surfaceBBox.fTop, surfaceBBox.fRight, 0);
if (!rect.isEmpty()) {
paint.setColor(image->getColor(width - 1, 0));
canvas.drawRect(rect, paint);
}
rect = SkRect::MakeLTRB(width, height, surfaceBBox.fRight,
surfaceBBox.fBottom);
if (!rect.isEmpty()) {
paint.setColor(image->getColor(width - 1, height - 1));
canvas.drawRect(rect, paint);
}
rect = SkRect::MakeLTRB(surfaceBBox.fLeft, height, 0,
surfaceBBox.fBottom);
if (!rect.isEmpty()) {
paint.setColor(image->getColor(0, height - 1));
canvas.drawRect(rect, paint);
}
}
// Then expand the left, right, top, then bottom.
if (tileModes[0] == SkShader::kClamp_TileMode) {
SkIRect subset = SkIRect::MakeXYWH(0, 0, 1, height);
if (surfaceBBox.fLeft < 0) {
SkBitmap left;
SkAssertResult(image->extractSubset(&left, subset));
SkMatrix leftMatrix;
leftMatrix.setScale(-surfaceBBox.fLeft, 1);
leftMatrix.postTranslate(surfaceBBox.fLeft, 0);
canvas.drawBitmapMatrix(left, leftMatrix);
if (tileModes[1] == SkShader::kMirror_TileMode) {
leftMatrix.postScale(1, -1);
leftMatrix.postTranslate(0, 2 * height);
canvas.drawBitmapMatrix(left, leftMatrix);
}
patternBBox.fLeft = 0;
}
if (surfaceBBox.fRight > width) {
SkBitmap right;
subset.offset(width - 1, 0);
SkAssertResult(image->extractSubset(&right, subset));
SkMatrix rightMatrix;
rightMatrix.setScale(surfaceBBox.fRight - width, 1);
rightMatrix.postTranslate(width, 0);
canvas.drawBitmapMatrix(right, rightMatrix);
if (tileModes[1] == SkShader::kMirror_TileMode) {
rightMatrix.postScale(1, -1);
rightMatrix.postTranslate(0, 2 * height);
canvas.drawBitmapMatrix(right, rightMatrix);
}
patternBBox.fRight = surfaceBBox.width();
}
}
if (tileModes[1] == SkShader::kClamp_TileMode) {
SkIRect subset = SkIRect::MakeXYWH(0, 0, width, 1);
if (surfaceBBox.fTop < 0) {
SkBitmap top;
SkAssertResult(image->extractSubset(&top, subset));
SkMatrix topMatrix;
topMatrix.setScale(1, -surfaceBBox.fTop);
topMatrix.postTranslate(0, surfaceBBox.fTop);
canvas.drawBitmapMatrix(top, topMatrix);
if (tileModes[0] == SkShader::kMirror_TileMode) {
topMatrix.postScale(-1, 1);
topMatrix.postTranslate(2 * width, 0);
canvas.drawBitmapMatrix(top, topMatrix);
}
patternBBox.fTop = 0;
}
if (surfaceBBox.fBottom > height) {
SkBitmap bottom;
subset.offset(0, height - 1);
SkAssertResult(image->extractSubset(&bottom, subset));
SkMatrix bottomMatrix;
bottomMatrix.setScale(1, surfaceBBox.fBottom - height);
bottomMatrix.postTranslate(0, height);
canvas.drawBitmapMatrix(bottom, bottomMatrix);
if (tileModes[0] == SkShader::kMirror_TileMode) {
bottomMatrix.postScale(-1, 1);
bottomMatrix.postTranslate(2 * width, 0);
canvas.drawBitmapMatrix(bottom, bottomMatrix);
}
patternBBox.fBottom = surfaceBBox.height();
}
}
SkRefPtr<SkPDFArray> patternBBoxArray = new SkPDFArray;
patternBBoxArray->unref(); // SkRefPtr and new both took a reference.
patternBBoxArray->reserve(4);
patternBBoxArray->append(new SkPDFScalar(patternBBox.fLeft))->unref();
patternBBoxArray->append(new SkPDFScalar(patternBBox.fTop))->unref();
patternBBoxArray->append(new SkPDFScalar(patternBBox.fRight))->unref();
patternBBoxArray->append(new SkPDFScalar(patternBBox.fBottom))->unref();
// Put the canvas into the pattern stream (fContent).
SkRefPtr<SkStream> content = pattern.content();
content->unref(); // SkRefPtr and content() both took a reference.
pattern.getResources(&fResources);
fContent = new SkPDFStream(content.get());
fContent->unref(); // SkRefPtr and new both took a reference.
fContent->insert("Type", new SkPDFName("Pattern"))->unref();
fContent->insert("PatternType", new SkPDFInt(1))->unref();
fContent->insert("PaintType", new SkPDFInt(1))->unref();
fContent->insert("TilingType", new SkPDFInt(1))->unref();
fContent->insert("BBox", patternBBoxArray.get());
fContent->insert("XStep", new SkPDFScalar(patternBBox.width()))->unref();
fContent->insert("YStep", new SkPDFScalar(patternBBox.height()))->unref();
fContent->insert("Resources", pattern.getResourceDict().get());
fContent->insert("Matrix", SkPDFUtils::MatrixToArray(finalMatrix))->unref();
fState.get()->fImage.unlockPixels();
}
SkPDFStream* SkPDFShader::makePSFunction(const SkString& psCode,
SkPDFArray* domain) {
SkRefPtr<SkMemoryStream> funcStream =
new SkMemoryStream(psCode.c_str(), psCode.size(), true);
funcStream->unref(); // SkRefPtr and new both took a reference.
SkPDFStream* result = new SkPDFStream(funcStream.get());
result->insert("FunctionType", new SkPDFInt(4))->unref();
result->insert("Domain", domain);
result->insert("Range", rangeObject());
return result;
}
bool SkPDFShader::State::operator==(const SkPDFShader::State& b) const {
if (fType != b.fType ||
fCanvasTransform != b.fCanvasTransform ||
fShaderTransform != b.fShaderTransform ||
fBBox != b.fBBox) {
return false;
}
if (fType == SkShader::kNone_GradientType) {
if (fPixelGeneration != b.fPixelGeneration ||
fPixelGeneration == 0 ||
fImageTileModes[0] != b.fImageTileModes[0] ||
fImageTileModes[1] != b.fImageTileModes[1]) {
return false;
}
} else {
if (fInfo.fColorCount != b.fInfo.fColorCount ||
memcmp(fInfo.fColors, b.fInfo.fColors,
sizeof(SkColor) * fInfo.fColorCount) != 0 ||
memcmp(fInfo.fColorOffsets, b.fInfo.fColorOffsets,
sizeof(SkScalar) * fInfo.fColorCount) != 0 ||
fInfo.fPoint[0] != b.fInfo.fPoint[0] ||
fInfo.fTileMode != b.fInfo.fTileMode) {
return false;
}
switch (fType) {
case SkShader::kLinear_GradientType:
if (fInfo.fPoint[1] != b.fInfo.fPoint[1]) {
return false;
}
break;
case SkShader::kRadial_GradientType:
if (fInfo.fRadius[0] != b.fInfo.fRadius[0]) {
return false;
}
break;
case SkShader::kRadial2_GradientType:
if (fInfo.fPoint[1] != b.fInfo.fPoint[1] ||
fInfo.fRadius[0] != b.fInfo.fRadius[0] ||
fInfo.fRadius[1] != b.fInfo.fRadius[1]) {
return false;
}
break;
case SkShader::kSweep_GradientType:
case SkShader::kNone_GradientType:
case SkShader::kColor_GradientType:
break;
}
}
return true;
}
SkPDFShader::State::State(const SkShader& shader,
const SkMatrix& canvasTransform, const SkIRect& bbox)
: fCanvasTransform(canvasTransform),
fBBox(bbox) {
fInfo.fColorCount = 0;
fInfo.fColors = NULL;
fInfo.fColorOffsets = NULL;
shader.getLocalMatrix(&fShaderTransform);
fType = shader.asAGradient(&fInfo);
if (fType == SkShader::kNone_GradientType) {
SkShader::BitmapType bitmapType;
SkMatrix matrix;
bitmapType = shader.asABitmap(&fImage, &matrix, fImageTileModes, NULL);
if (bitmapType != SkShader::kDefault_BitmapType) {
fImage.reset();
return;
}
SkASSERT(matrix.isIdentity());
fPixelGeneration = fImage.getGenerationID();
} else {
fColorData.set(sk_malloc_throw(
fInfo.fColorCount * (sizeof(SkColor) + sizeof(SkScalar))));
fInfo.fColors = (SkColor*)fColorData.get();
fInfo.fColorOffsets = (SkScalar*)(fInfo.fColors + fInfo.fColorCount);
shader.asAGradient(&fInfo);
}
}