SkPaint SkColorSpaceXformer::apply(const SkPaint& src) {
const AutoCachePurge autoPurge(this);
SkPaint dst = src;
// All SkColorSpaces have the same black point.
if (src.getColor() & 0xffffff) {
dst.setColor(this->apply(src.getColor()));
}
if (auto shader = src.getShader()) {
dst.setShader(this->apply(shader));
}
if (auto cf = src.getColorFilter()) {
dst.setColorFilter(this->apply(cf));
}
if (auto looper = src.getDrawLooper()) {
dst.setDrawLooper(looper->makeColorSpace(this));
}
if (auto imageFilter = src.getImageFilter()) {
dst.setImageFilter(this->apply(imageFilter));
}
return dst;
}
bool SkPaint2GrPaint(GrContext* context, GrRenderTarget* rt, const SkPaint& skPaint,
const SkMatrix& viewM, bool constantColor, GrPaint* grPaint) {
SkShader* shader = skPaint.getShader();
if (NULL == shader) {
return SkPaint2GrPaintNoShader(context, rt, skPaint, SkColor2GrColor(skPaint.getColor()),
constantColor, grPaint);
}
GrColor paintColor = SkColor2GrColor(skPaint.getColor());
// Start a new block here in order to preserve our context state after calling
// asFragmentProcessor(). Since these calls get passed back to the client, we don't really
// want them messing around with the context.
{
// Allow the shader to modify paintColor and also create an effect to be installed as
// the first color effect on the GrPaint.
GrFragmentProcessor* fp = NULL;
if (!shader->asFragmentProcessor(context, skPaint, viewM, NULL, &paintColor,
grPaint->getProcessorDataManager(), &fp)) {
return false;
}
if (fp) {
grPaint->addColorProcessor(fp)->unref();
constantColor = false;
}
}
// The grcolor is automatically set when calling asFragmentProcessor.
// If the shader can be seen as an effect it returns true and adds its effect to the grpaint.
return SkPaint2GrPaintNoShader(context, rt, skPaint, paintColor, constantColor, grPaint);
}
bool onMatch(SkRecord* record, Pattern* pattern, unsigned begin, unsigned end) {
SaveLayer* saveLayer = pattern->first<SaveLayer>();
if (saveLayer->bounds != NULL) {
// SaveLayer with bounds is too tricky for us.
return false;
}
SkPaint* layerPaint = saveLayer->paint;
if (NULL == layerPaint) {
// There wasn't really any point to this SaveLayer at all.
return KillSaveLayerAndRestore(record, begin);
}
SkPaint* drawPaint = pattern->second<SkPaint>();
if (drawPaint == NULL) {
// We can just give the draw the SaveLayer's paint.
// TODO(mtklein): figure out how to do this clearly
return false;
}
const uint32_t layerColor = layerPaint->getColor();
const uint32_t drawColor = drawPaint->getColor();
if (!IsOnlyAlpha(layerColor) || !IsOpaque(drawColor) ||
HasAnyEffect(*layerPaint) || HasAnyEffect(*drawPaint)) {
// Too fancy for us. Actually, as long as layerColor is just an alpha
// we can blend it into drawColor's alpha; drawColor doesn't strictly have to be opaque.
return false;
}
drawPaint->setColor(SkColorSetA(drawColor, SkColorGetA(layerColor)));
return KillSaveLayerAndRestore(record, begin);
}
bool SkBitmapProcShader::asFragmentProcessor(GrContext* context, const SkPaint& paint,
const SkMatrix& viewM,
const SkMatrix* localMatrix, GrColor* paintColor,
GrProcessorDataManager* procDataManager,
GrFragmentProcessor** fp) const {
SkMatrix matrix;
matrix.setIDiv(fRawBitmap.width(), fRawBitmap.height());
SkMatrix lmInverse;
if (!this->getLocalMatrix().invert(&lmInverse)) {
return false;
}
if (localMatrix) {
SkMatrix inv;
if (!localMatrix->invert(&inv)) {
return false;
}
lmInverse.postConcat(inv);
}
matrix.preConcat(lmInverse);
SkShader::TileMode tm[] = {
(TileMode)fTileModeX,
(TileMode)fTileModeY,
};
// Must set wrap and filter on the sampler before requesting a texture. In two places below
// we check the matrix scale factors to determine how to interpret the filter quality setting.
// This completely ignores the complexity of the drawVertices case where explicit local coords
// are provided by the caller.
bool doBicubic;
GrTextureParams::FilterMode textureFilterMode =
GrSkFilterQualityToGrFilterMode(paint.getFilterQuality(), viewM, this->getLocalMatrix(),
&doBicubic);
GrTextureParams params(tm, textureFilterMode);
SkAutoTUnref<GrTexture> texture(GrRefCachedBitmapTexture(context, fRawBitmap, ¶ms));
if (!texture) {
SkErrorInternals::SetError( kInternalError_SkError,
"Couldn't convert bitmap to texture.");
return false;
}
*paintColor = (kAlpha_8_SkColorType == fRawBitmap.colorType()) ?
SkColor2GrColor(paint.getColor()) :
SkColor2GrColorJustAlpha(paint.getColor());
if (doBicubic) {
*fp = GrBicubicEffect::Create(procDataManager, texture, matrix, tm);
} else {
*fp = GrSimpleTextureEffect::Create(procDataManager, texture, matrix, params);
}
return true;
}
SkRGB16_Black_Blitter::SkRGB16_Black_Blitter(const SkPixmap& device, const SkPaint& paint)
: INHERITED(device, paint) {
SkASSERT(paint.getShader() == nullptr);
SkASSERT(paint.getColorFilter() == nullptr);
SkASSERT(paint.isSrcOver());
SkASSERT(paint.getColor() == SK_ColorBLACK);
}
void setup(const SkPixmap& dst, int left, int top, const SkPaint& paint) override {
fDst = dst;
fLeft = left;
fTop = top;
fPaintColor = SkColor4f_from_SkColor(paint.getColor(), fDst.colorSpace());
SkRasterPipeline p(fAlloc);
switch (fSource.colorType()) {
case kAlpha_8_SkColorType: p.append(SkRasterPipeline::load_a8, &fSrcPtr); break;
case kGray_8_SkColorType: p.append(SkRasterPipeline::load_g8, &fSrcPtr); break;
case kRGB_565_SkColorType: p.append(SkRasterPipeline::load_565, &fSrcPtr); break;
case kARGB_4444_SkColorType: p.append(SkRasterPipeline::load_4444, &fSrcPtr); break;
case kBGRA_8888_SkColorType: p.append(SkRasterPipeline::load_bgra, &fSrcPtr); break;
case kRGBA_8888_SkColorType: p.append(SkRasterPipeline::load_8888, &fSrcPtr); break;
case kRGBA_F16_SkColorType: p.append(SkRasterPipeline::load_f16, &fSrcPtr); break;
default: SkASSERT(false);
}
if (fDst.colorSpace() &&
(!fSource.colorSpace() || fSource.colorSpace()->gammaCloseToSRGB())) {
p.append_from_srgb(fSource.alphaType());
}
if (fSource.colorType() == kAlpha_8_SkColorType) {
p.append(SkRasterPipeline::set_rgb, &fPaintColor);
p.append(SkRasterPipeline::premul);
}
append_gamut_transform(&p, fAlloc,
fSource.colorSpace(), fDst.colorSpace(), kPremul_SkAlphaType);
if (fPaintColor.fA != 1.0f) {
p.append(SkRasterPipeline::scale_1_float, &fPaintColor.fA);
}
bool is_opaque = fSource.isOpaque() && fPaintColor.fA == 1.0f;
fBlitter = SkCreateRasterPipelineBlitter(fDst, paint, p, is_opaque, fAlloc);
}
SkARGB4444_Blitter::SkARGB4444_Blitter(const SkBitmap& device,
const SkPaint& paint) : INHERITED(device) {
// cache premultiplied versions in 4444
SkPMColor c = SkPreMultiplyColor(paint.getColor());
fPMColor16 = SkPixel32ToPixel4444(c);
if (paint.isDither()) {
fPMColor16Other = SkDitherPixel32To4444(c);
} else {
fPMColor16Other = fPMColor16;
}
// cache raw versions in 4444
fRawColor16 = SkPackARGB4444(0xFF >> 4, SkColorGetR(c) >> 4,
SkColorGetG(c) >> 4, SkColorGetB(c) >> 4);
if (paint.isDither()) {
fRawColor16Other = SkDitherARGB32To4444(0xFF, SkColorGetR(c),
SkColorGetG(c), SkColorGetB(c));
} else {
fRawColor16Other = fRawColor16;
}
fScale16 = SkAlpha15To16(SkGetPackedA4444(fPMColor16Other));
if (16 == fScale16) {
// force the original to also be opaque
fPMColor16 |= (0xF << SK_A4444_SHIFT);
}
}
bool SkColorShader::setContext(const SkBitmap& device, const SkPaint& paint,
const SkMatrix& matrix) {
if (!this->INHERITED::setContext(device, paint, matrix)) {
return false;
}
SkColor c;
unsigned a;
if (fInheritColor) {
c = paint.getColor();
a = SkColorGetA(c);
} else {
c = fColor;
a = SkAlphaMul(SkColorGetA(c), SkAlpha255To256(paint.getAlpha()));
}
unsigned r = SkColorGetR(c);
unsigned g = SkColorGetG(c);
unsigned b = SkColorGetB(c);
// we want this before we apply any alpha
fColor16 = SkPack888ToRGB16(r, g, b);
if (a != 255) {
a = SkAlpha255To256(a);
r = SkAlphaMul(r, a);
g = SkAlphaMul(g, a);
b = SkAlphaMul(b, a);
}
fPMColor = SkPackARGB32(a, r, g, b);
return true;
}
void SkOverdrawCanvas::onDrawPaint(const SkPaint& paint) {
if (0 == paint.getColor() && !paint.getColorFilter() && !paint.getShader()) {
// This is a clear, ignore it.
} else {
fList[0]->onDrawPaint(this->overdrawPaint(paint));
}
}
void paintSkiaText(GraphicsContext* context,
HFONT hfont,
int numGlyphs,
const WORD* glyphs,
const int* advances,
const GOFFSET* offsets,
const SkPoint* origin)
{
HDC dc = GetDC(0);
HGDIOBJ oldFont = SelectObject(dc, hfont);
PlatformContextSkia* platformContext = context->platformContext();
SkCanvas* canvas = platformContext->canvas();
TextDrawingModeFlags textMode = platformContext->getTextDrawingMode();
// If platformContext is GPU-backed make its GL context current.
platformContext->makeGrContextCurrent();
// Filling (if necessary). This is the common case.
SkPaint paint;
platformContext->setupPaintForFilling(&paint);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
setupPaintForFont(hfont, &paint, platformContext);
bool didFill = false;
if ((textMode & TextModeFill) && (SkColorGetA(paint.getColor()) || paint.getLooper())) {
skiaDrawText(canvas, *origin, &paint, &glyphs[0], &advances[0], &offsets[0], numGlyphs);
didFill = true;
}
// Stroking on top (if necessary).
if ((textMode & TextModeStroke)
&& platformContext->getStrokeStyle() != NoStroke
&& platformContext->getStrokeThickness() > 0) {
paint.reset();
platformContext->setupPaintForStroking(&paint, 0, 0);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
setupPaintForFont(hfont, &paint, platformContext);
if (didFill) {
// If there is a shadow and we filled above, there will already be
// a shadow. We don't want to draw it again or it will be too dark
// and it will go on top of the fill.
//
// Note that this isn't strictly correct, since the stroke could be
// very thick and the shadow wouldn't account for this. The "right"
// thing would be to draw to a new layer and then draw that layer
// with a shadow. But this is a lot of extra work for something
// that isn't normally an issue.
paint.setLooper(0);
}
skiaDrawText(canvas, *origin, &paint, &glyphs[0], &advances[0], &offsets[0], numGlyphs);
}
SelectObject(dc, oldFont);
ReleaseDC(0, dc);
}
static void lettersToBitmap2(SkBitmap* dst, const char chars[],
const SkPaint& original, SkBitmap::Config config) {
SkPath path;
SkScalar x = 0;
SkScalar width;
SkPath p;
for (size_t i = 0; i < strlen(chars); i++) {
original.getTextPath(&chars[i], 1, x, 0, &p);
path.addPath(p);
original.getTextWidths(&chars[i], 1, &width);
x += width;
}
SkRect bounds = path.getBounds();
SkScalar sw = -original.getStrokeWidth();
bounds.inset(sw, sw);
path.offset(-bounds.fLeft, -bounds.fTop);
bounds.offset(-bounds.fLeft, -bounds.fTop);
int w = SkScalarRound(bounds.width());
int h = SkScalarRound(bounds.height());
SkPaint paint(original);
paint.setAntiAlias(true);
paint.setXfermodeMode(SkXfermode::kDstATop_Mode);
paint.setColor(original.getColor());
paint.setStyle(SkPaint::kStroke_Style);
dst->setConfig(config, w, h);
dst->allocPixels();
dst->eraseColor(SK_ColorWHITE);
SkCanvas canvas(*dst);
canvas.drawPath(path, paint);
}
SkRGB16_Black_Blitter::SkRGB16_Black_Blitter(const SkBitmap& device, const SkPaint& paint)
: INHERITED(device, paint) {
SkASSERT(paint.getShader() == NULL);
SkASSERT(paint.getColorFilter() == NULL);
SkASSERT(paint.getXfermode() == NULL);
SkASSERT(paint.getColor() == SK_ColorBLACK);
}
// Check for:
// SAVE_LAYER
// SAVE
// CLIP_RECT
// DRAW_BITMAP_RECT_TO_RECT
// RESTORE
// RESTORE
// where the saveLayer's color can be moved into the drawBitmapRect
static bool check_1(SkDebugCanvas* canvas, int curCommand) {
if (SAVE_LAYER != canvas->getDrawCommandAt(curCommand)->getType() ||
canvas->getSize() <= curCommand+5 ||
SAVE != canvas->getDrawCommandAt(curCommand+1)->getType() ||
CLIP_RECT != canvas->getDrawCommandAt(curCommand+2)->getType() ||
DRAW_BITMAP_RECT_TO_RECT != canvas->getDrawCommandAt(curCommand+3)->getType() ||
RESTORE != canvas->getDrawCommandAt(curCommand+4)->getType() ||
RESTORE != canvas->getDrawCommandAt(curCommand+5)->getType()) {
return false;
}
SkSaveLayerCommand* saveLayer =
(SkSaveLayerCommand*) canvas->getDrawCommandAt(curCommand);
SkDrawBitmapRectCommand* dbmr =
(SkDrawBitmapRectCommand*) canvas->getDrawCommandAt(curCommand+3);
const SkPaint* saveLayerPaint = saveLayer->paint();
SkPaint* dbmrPaint = dbmr->paint();
// For this optimization we only fold the saveLayer and drawBitmapRect
// together if the saveLayer's draw is simple (i.e., no fancy effects) and
// and the only difference in the colors is that the saveLayer's can have
// an alpha while the drawBitmapRect's is opaque.
// TODO: it should be possible to fold them together even if they both
// have different non-255 alphas but this is low priority since we have
// never seen that case
// If either operation lacks a paint then the collapse is trivial
SkColor layerColor = saveLayerPaint->getColor() | 0xFF000000; // force opaque
return NULL == saveLayerPaint ||
NULL == dbmrPaint ||
(is_simple(*saveLayerPaint) && dbmrPaint->getColor() == layerColor);
}
void drawShadowedPath(SkCanvas* canvas, const SkPath& path,
const SkPoint3& zPlaneParams,
const SkPaint& paint, SkScalar ambientAlpha,
const SkPoint3& lightPos, SkScalar lightWidth, SkScalar spotAlpha) {
if (!fShowAmbient) {
ambientAlpha = 0;
}
if (!fShowSpot) {
spotAlpha = 0;
}
uint32_t flags = 0;
if (fUseAlt) {
flags |= SkShadowFlags::kGeometricOnly_ShadowFlag;
}
SkShadowUtils::DrawShadow(canvas, path, zPlaneParams,
lightPos, lightWidth,
ambientAlpha, spotAlpha, SK_ColorBLACK, flags);
if (fShowObject) {
canvas->drawPath(path, paint);
} else {
SkPaint strokePaint;
strokePaint.setColor(paint.getColor());
strokePaint.setStyle(SkPaint::kStroke_Style);
canvas->drawPath(path, strokePaint);
}
}
virtual void onDraw(SkCanvas* canvas) {
const SkIPoint dim = this->getSize();
SkRandom rand;
SkPaint paint(fPaint);
this->setupPaint(&paint);
// explicitly need these
paint.setColor(fPaint.getColor());
paint.setAntiAlias(kBW != fFQ);
paint.setLCDRenderText(kLCD == fFQ);
const SkScalar x0 = SkIntToScalar(-10);
const SkScalar y0 = SkIntToScalar(-10);
if (fDoPos) {
// realistically, the matrix is often at least translated, so we
// do that since it exercises different code in drawPosText.
canvas->translate(SK_Scalar1, SK_Scalar1);
}
for (int i = 0; i < N; i++) {
if (fDoPos) {
canvas->drawPosText(fText.c_str(), fText.size(), fPos, paint);
} else {
SkScalar x = x0 + rand.nextUScalar1() * dim.fX;
SkScalar y = y0 + rand.nextUScalar1() * dim.fY;
canvas->drawText(fText.c_str(), fText.size(), x, y, paint);
}
}
}
// Fold the saveLayer's alpha into the drawBitmapRect and remove the saveLayer
// and restore
static void apply_0(SkDebugCanvas* canvas, int curCommand) {
SkSaveLayerCommand* saveLayer =
(SkSaveLayerCommand*) canvas->getDrawCommandAt(curCommand);
const SkPaint* saveLayerPaint = saveLayer->paint();
// if (NULL == saveLayerPaint) the dbmr's paint doesn't need to be changed
if (NULL != saveLayerPaint) {
SkDrawBitmapRectCommand* dbmr =
(SkDrawBitmapRectCommand*) canvas->getDrawCommandAt(curCommand+1);
SkPaint* dbmrPaint = dbmr->paint();
if (NULL == dbmrPaint) {
// if the DBMR doesn't have a paint just use the saveLayer's
dbmr->setPaint(*saveLayerPaint);
} else if (NULL != saveLayerPaint) {
// Both paints are present so their alphas need to be combined
SkColor color = saveLayerPaint->getColor();
int a0 = SkColorGetA(color);
color = dbmrPaint->getColor();
int a1 = SkColorGetA(color);
int newA = SkMulDiv255Round(a0, a1);
SkASSERT(newA <= 0xFF);
SkColor newColor = SkColorSetA(color, newA);
dbmrPaint->setColor(newColor);
}
}
canvas->deleteDrawCommandAt(curCommand+2); // restore
canvas->deleteDrawCommandAt(curCommand); // saveLayer
}
void SkGL::SetPaint(const SkPaint& paint, bool isPremul, bool justAlpha) {
if (justAlpha) {
SkGL::SetAlpha(paint.getAlpha());
} else {
SkGL::SetColor(paint.getColor());
}
GLenum sm = GL_ONE;
GLenum dm = GL_ONE_MINUS_SRC_ALPHA;
SkXfermode* mode = paint.getXfermode();
SkXfermode::Coeff sc, dc;
if (mode && mode->asCoeff(&sc, &dc)) {
sm = gXfermodeCoeff2Blend[sc];
dm = gXfermodeCoeff2Blend[dc];
}
// hack for text, which is not-premul (afaik)
if (!isPremul) {
if (GL_ONE == sm) {
sm = GL_SRC_ALPHA;
}
}
glEnable(GL_BLEND);
glBlendFunc(sm, dm);
if (paint.isDither()) {
glEnable(GL_DITHER);
} else {
glDisable(GL_DITHER);
}
}
// Check for:
// SAVE_LAYER
// DRAW_BITMAP_RECT_TO_RECT
// RESTORE
// where the saveLayer's color can be moved into the drawBitmapRect
static bool check_0(SkDebugCanvas* canvas, int curCommand) {
if (SAVE_LAYER != canvas->getDrawCommandAt(curCommand)->getType() ||
canvas->getSize() <= curCommand+2 ||
DRAW_BITMAP_RECT_TO_RECT != canvas->getDrawCommandAt(curCommand+1)->getType() ||
RESTORE != canvas->getDrawCommandAt(curCommand+2)->getType()) {
return false;
}
SkSaveLayerCommand* saveLayer =
(SkSaveLayerCommand*) canvas->getDrawCommandAt(curCommand);
SkDrawBitmapRectCommand* dbmr =
(SkDrawBitmapRectCommand*) canvas->getDrawCommandAt(curCommand+1);
const SkPaint* saveLayerPaint = saveLayer->paint();
SkPaint* dbmrPaint = dbmr->paint();
// For this optimization we only fold the saveLayer and drawBitmapRect
// together if the saveLayer's draw is simple (i.e., no fancy effects)
// and the only difference in the colors is their alpha value
SkColor layerColor = saveLayerPaint->getColor() | 0xFF000000; // force opaque
SkColor dbmrColor = dbmrPaint->getColor() | 0xFF000000; // force opaque
// If either operation lacks a paint then the collapse is trivial
return NULL == saveLayerPaint ||
NULL == dbmrPaint ||
(is_simple(*saveLayerPaint) && dbmrColor == layerColor);
}
SkARGB4444_Blitter::SkARGB4444_Blitter(const SkBitmap& device, const SkPaint& paint)
: INHERITED(device)
{
// cache premultiplied versions in 4444
SkPMColor c = SkPreMultiplyColor(paint.getColor());
fPMColor16 = SkPixel32ToPixel4444(c);
if (paint.isDither()) {
fPMColor16Other = SkDitherPixel32To4444(c);
} else {
fPMColor16Other = fPMColor16;
}
// cache raw versions in 4444
fRawColor16 = SkPackARGB4444(0xFF >> 4, SkColorGetR(c) >> 4,
SkColorGetG(c) >> 4, SkColorGetB(c) >> 4);
if (paint.isDither()) {
fRawColor16Other = SkDitherARGB32To4444(0xFF, SkColorGetR(c),
SkColorGetG(c), SkColorGetB(c));
} else {
fRawColor16Other = fRawColor16;
}
#if 0 /// don't think this assertion is true, but need it be?
// our dithered color will be the same or more opaque than the original
// so use dithered to compute our scale
SkASSERT(SkGetPackedA4444(fPMColor16Other) >= SkGetPackedA4444(fPMColor16));
#endif
fScale16 = SkAlpha15To16(SkGetPackedA4444(fPMColor16Other));
if (16 == fScale16) {
// force the original to also be opaque
fPMColor16 |= (0xF << SK_A4444_SHIFT);
}
}
State4f(const SkImageInfo& info, const SkPaint& paint, const SkShader::Context* shaderContext) {
fXfer = paint.getXfermode();
if (shaderContext) {
fBuffer.reset(info.width());
} else {
fPM4f = SkColor4f::FromColor(paint.getColor()).premul();
}
fFlags = 0;
}
void SkSVGDevice::AutoElement::addPaint(const SkPaint& paint, const Resources& resources) {
SkPaint::Style style = paint.getStyle();
if (style == SkPaint::kFill_Style || style == SkPaint::kStrokeAndFill_Style) {
this->addAttribute("fill", resources.fPaintServer);
if (SK_AlphaOPAQUE != SkColorGetA(paint.getColor())) {
this->addAttribute("fill-opacity", svg_opacity(paint.getColor()));
}
} else {
SkASSERT(style == SkPaint::kStroke_Style);
this->addAttribute("fill", "none");
}
if (style == SkPaint::kStroke_Style || style == SkPaint::kStrokeAndFill_Style) {
this->addAttribute("stroke", resources.fPaintServer);
SkScalar strokeWidth = paint.getStrokeWidth();
if (strokeWidth == 0) {
// Hairline stroke
strokeWidth = 1;
this->addAttribute("vector-effect", "non-scaling-stroke");
}
this->addAttribute("stroke-width", strokeWidth);
if (const char* cap = svg_cap(paint.getStrokeCap())) {
this->addAttribute("stroke-linecap", cap);
}
if (const char* join = svg_join(paint.getStrokeJoin())) {
this->addAttribute("stroke-linejoin", join);
}
if (paint.getStrokeJoin() == SkPaint::kMiter_Join) {
this->addAttribute("stroke-miterlimit", paint.getStrokeMiter());
}
if (SK_AlphaOPAQUE != SkColorGetA(paint.getColor())) {
this->addAttribute("stroke-opacity", svg_opacity(paint.getColor()));
}
} else {
SkASSERT(style == SkPaint::kFill_Style);
this->addAttribute("stroke", "none");
}
}
static bool fold_opacity_layer_color_to_paint(const SkPaint& layerPaint,
bool isSaveLayer,
SkPaint* paint) {
// We assume layerPaint is always from a saveLayer. If isSaveLayer is
// true, we assume paint is too.
// The alpha folding can proceed if the filter layer paint does not have properties which cause
// the resulting filter layer to be "blended" in complex ways to the parent layer. For example,
// looper drawing unmodulated filter layer twice and then modulating the result produces
// different image to drawing modulated filter layer twice.
// TODO: most likely the looper and only some xfer modes are the hard constraints
if (paint->getXfermode() || paint->getLooper()) {
return false;
}
if (!isSaveLayer && paint->getImageFilter()) {
// For normal draws, the paint color is used as one input for the color for the draw. Image
// filter will operate on the result, and thus we can not change the input.
// For layer saves, the image filter is applied to the layer contents. The layer is then
// modulated with the paint color, so it's fine to proceed with the fold for saveLayer
// paints with image filters.
return false;
}
if (paint->getColorFilter()) {
// Filter input depends on the paint color.
// Here we could filter the color if we knew the draw is going to be uniform color. This
// should be detectable as drawPath/drawRect/.. without a shader being uniform, while
// drawBitmap/drawSprite or a shader being non-uniform. However, current matchers don't
// give the type out easily, so just do not optimize that at the moment.
return false;
}
const uint32_t layerColor = layerPaint.getColor();
// The layer paint color must have only alpha component.
if (SK_ColorTRANSPARENT != SkColorSetA(layerColor, SK_AlphaTRANSPARENT)) {
return false;
}
// The layer paint can not have any effects.
if (layerPaint.getPathEffect() ||
layerPaint.getShader() ||
layerPaint.getXfermode() ||
layerPaint.getMaskFilter() ||
layerPaint.getColorFilter() ||
layerPaint.getRasterizer() ||
layerPaint.getLooper() ||
layerPaint.getImageFilter()) {
return false;
}
paint->setAlpha(SkMulDiv255Round(paint->getAlpha(), SkColorGetA(layerColor)));
return true;
}
const char* onGetName() override {
fName.printf("text_%g", SkScalarToFloat(fPaint.getTextSize()));
if (fDoPos) {
fName.append("_pos");
}
fName.appendf("_%s", fontQualityName(fPaint));
if (SK_ColorBLACK == fPaint.getColor()) {
fName.append("_BK");
} else if (SK_ColorWHITE == fPaint.getColor()) {
fName.append("_WT");
} else {
fName.appendf("_%02X", fPaint.getAlpha());
}
if (fDoColorEmoji) {
fName.append("_ColorEmoji");
}
return fName.c_str();
}
static void apply_paint_color(const SkPaint& paint, Json::Value* target) {
SkColor color = paint.getColor();
if (color != SK_ColorBLACK) {
Json::Value colorValue(Json::arrayValue);
colorValue.append(Json::Value(SkColorGetA(color)));
colorValue.append(Json::Value(SkColorGetR(color)));
colorValue.append(Json::Value(SkColorGetG(color)));
colorValue.append(Json::Value(SkColorGetB(color)));
(*target)[SKJSONCANVAS_ATTRIBUTE_COLOR] = colorValue;;
}
}
void paintSkiaText(GraphicsContext* context,
HFONT hfont,
int numGlyphs,
const WORD* glyphs,
const int* advances,
const GOFFSET* offsets,
const SkPoint* origin)
{
PlatformContextSkia* platformContext = context->platformContext();
SkCanvas* canvas = platformContext->canvas();
TextDrawingModeFlags textMode = platformContext->getTextDrawingMode();
// Ensure font load for printing, because PDF device needs it.
if (canvas->getTopDevice()->getDeviceCapabilities() & SkDevice::kVector_Capability)
PlatformSupport::ensureFontLoaded(hfont);
// Filling (if necessary). This is the common case.
SkPaint paint;
platformContext->setupPaintForFilling(&paint);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
setupPaintForFont(hfont, &paint, platformContext);
bool didFill = false;
if ((textMode & TextModeFill) && (SkColorGetA(paint.getColor()) || paint.getLooper())) {
skiaDrawText(canvas, *origin, &paint, &glyphs[0], &advances[0], &offsets[0], numGlyphs);
didFill = true;
}
// Stroking on top (if necessary).
if ((textMode & TextModeStroke)
&& platformContext->getStrokeStyle() != NoStroke
&& platformContext->getStrokeThickness() > 0) {
paint.reset();
platformContext->setupPaintForStroking(&paint, 0, 0);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
setupPaintForFont(hfont, &paint, platformContext);
if (didFill) {
// If there is a shadow and we filled above, there will already be
// a shadow. We don't want to draw it again or it will be too dark
// and it will go on top of the fill.
//
// Note that this isn't strictly correct, since the stroke could be
// very thick and the shadow wouldn't account for this. The "right"
// thing would be to draw to a new layer and then draw that layer
// with a shadow. But this is a lot of extra work for something
// that isn't normally an issue.
paint.setLooper(0);
}
skiaDrawText(canvas, *origin, &paint, &glyphs[0], &advances[0], &offsets[0], numGlyphs);
}
}
// This is only used to draw borders.
void GraphicsContext::drawLine(const IntPoint& point1, const IntPoint& point2)
{
if (paintingDisabled())
return;
StrokeStyle penStyle = strokeStyle();
if (penStyle == NoStroke)
return;
SkPaint paint;
if (!isPointSkiaSafe(getCTM(), point1) || !isPointSkiaSafe(getCTM(), point2))
return;
platformContext()->prepareForSoftwareDraw();
FloatPoint p1 = point1;
FloatPoint p2 = point2;
bool isVerticalLine = (p1.x() == p2.x());
int width = roundf(strokeThickness());
// We know these are vertical or horizontal lines, so the length will just
// be the sum of the displacement component vectors give or take 1 -
// probably worth the speed up of no square root, which also won't be exact.
FloatSize disp = p2 - p1;
int length = SkScalarRound(disp.width() + disp.height());
platformContext()->setupPaintForStroking(&paint, 0, length);
if (strokeStyle() == DottedStroke || strokeStyle() == DashedStroke) {
// Do a rect fill of our endpoints. This ensures we always have the
// appearance of being a border. We then draw the actual dotted/dashed line.
SkRect r1, r2;
r1.set(p1.x(), p1.y(), p1.x() + width, p1.y() + width);
r2.set(p2.x(), p2.y(), p2.x() + width, p2.y() + width);
if (isVerticalLine) {
r1.offset(-width / 2, 0);
r2.offset(-width / 2, -width);
} else {
r1.offset(0, -width / 2);
r2.offset(-width, -width / 2);
}
SkPaint fillPaint;
fillPaint.setColor(paint.getColor());
platformContext()->canvas()->drawRect(r1, fillPaint);
platformContext()->canvas()->drawRect(r2, fillPaint);
}
adjustLineToPixelBoundaries(p1, p2, width, penStyle);
SkPoint pts[2] = { (SkPoint)p1, (SkPoint)p2 };
platformContext()->canvas()->drawPoints(SkCanvas::kLines_PointMode, 2, pts, paint);
}
SkARGB32_Blitter::SkARGB32_Blitter(const SkBitmap& device, const SkPaint& paint)
: INHERITED(device) {
uint32_t color = paint.getColor();
fSrcA = SkColorGetA(color);
unsigned scale = SkAlpha255To256(fSrcA);
fSrcR = SkAlphaMul(SkColorGetR(color), scale);
fSrcG = SkAlphaMul(SkColorGetG(color), scale);
fSrcB = SkAlphaMul(SkColorGetB(color), scale);
fPMColor = SkPackARGB32(fSrcA, fSrcR, fSrcG, fSrcB);
}
static void paintSkiaText(GraphicsContext* context, HFONT hfont,
SkTypeface* face, float size, uint32_t textFlags,
int numGlyphs,
const WORD* glyphs,
const int* advances,
const GOFFSET* offsets,
const SkPoint& origin,
const SkRect& textRect)
{
TextDrawingModeFlags textMode = context->textDrawingMode();
// Ensure font load for printing, because PDF device needs it.
if (context->isPrintingDevice())
FontPlatformData::ensureFontLoaded(hfont);
// Filling (if necessary). This is the common case.
SkPaint paint;
context->setupPaintForFilling(&paint);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
setupPaintForFont(&paint, context, face, size, textFlags);
bool didFill = false;
if ((textMode & TextModeFill) && (SkColorGetA(paint.getColor()) || paint.getLooper())) {
skiaDrawText(context, origin, textRect, &paint, &glyphs[0], &advances[0], &offsets[0], numGlyphs);
didFill = true;
}
// Stroking on top (if necessary).
if ((textMode & TextModeStroke)
&& context->strokeStyle() != NoStroke
&& context->strokeThickness() > 0) {
paint.reset();
context->setupPaintForStroking(&paint);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
setupPaintForFont(&paint, context, face, size, textFlags);
if (didFill) {
// If there is a shadow and we filled above, there will already be
// a shadow. We don't want to draw it again or it will be too dark
// and it will go on top of the fill.
//
// Note that this isn't strictly correct, since the stroke could be
// very thick and the shadow wouldn't account for this. The "right"
// thing would be to draw to a new layer and then draw that layer
// with a shadow. But this is a lot of extra work for something
// that isn't normally an issue.
paint.setLooper(0);
}
skiaDrawText(context, origin, textRect, &paint, &glyphs[0], &advances[0], &offsets[0], numGlyphs);
}
}
virtual const char* onGetName() {
fName.printf("text_%g", SkScalarToFloat(fPaint.getTextSize()));
if (fDoPos) {
fName.append("_pos");
}
fName.appendf("_%s", fontQualityName(fPaint));
if (SK_ColorBLACK != fPaint.getColor()) {
fName.appendf("_%02X", fPaint.getAlpha());
} else {
fName.append("_BK");
}
return fName.c_str();
}
static bool drawNeedsLayer(const SkPaint& paint)
{
if (SkColorGetA(paint.getColor()) < 255)
return true;
SkXfermode::Mode xfermode;
if (SkXfermode::AsMode(paint.getXfermode(), &xfermode)) {
if (xfermode != SkXfermode::kSrcOver_Mode)
return true;
}
return false;
}
