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v811_spc009/external/skia/modules/canvaskit/canvaskit_bindings.cpp

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/*
* Copyright 2018 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/android/SkAnimatedImage.h"
#include "include/codec/SkAndroidCodec.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkBlurTypes.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkColorSpace.h"
#include "include/core/SkData.h"
#include "include/core/SkEncodedImageFormat.h"
#include "include/core/SkFilterQuality.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkM44.h"
#include "include/core/SkMaskFilter.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkPathEffect.h"
#include "include/core/SkPathMeasure.h"
#include "include/core/SkPicture.h"
#include "include/core/SkPictureRecorder.h"
#include "include/core/SkRRect.h"
#include "include/core/SkSamplingOptions.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkString.h"
#include "include/core/SkStrokeRec.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "include/core/SkVertices.h"
#include "include/effects/SkCornerPathEffect.h"
#include "include/effects/SkDashPathEffect.h"
#include "include/effects/SkDiscretePathEffect.h"
#include "include/effects/SkGradientShader.h"
#include "include/effects/SkImageFilters.h"
#include "include/effects/SkPerlinNoiseShader.h"
#include "include/effects/SkRuntimeEffect.h"
#include "include/effects/SkTrimPathEffect.h"
#include "include/private/SkShadowFlags.h"
#include "include/utils/SkParsePath.h"
#include "include/utils/SkShadowUtils.h"
#include "modules/skparagraph/include/Paragraph.h"
#include "src/core/SkPathPriv.h"
#include "src/core/SkResourceCache.h"
#include "src/image/SkImage_Base.h"
#include "src/sksl/SkSLCompiler.h"
#include "modules/canvaskit/WasmCommon.h"
#include <emscripten.h>
#include <emscripten/bind.h>
#ifdef SK_GL
#include "include/gpu/GrBackendSurface.h"
#include "include/gpu/GrDirectContext.h"
#include "include/gpu/gl/GrGLInterface.h"
#include "include/gpu/gl/GrGLTypes.h"
#include <GLES3/gl3.h>
#include <emscripten/html5.h>
#endif
#ifndef SK_NO_FONTS
#include "include/core/SkFont.h"
#include "include/core/SkFontMetrics.h"
#include "include/core/SkFontMgr.h"
#include "include/core/SkFontTypes.h"
#endif
#ifdef SK_INCLUDE_PATHOPS
#include "include/pathops/SkPathOps.h"
#endif
#ifndef SK_NO_FONTS
sk_sp<SkFontMgr> SkFontMgr_New_Custom_Data(sk_sp<SkData>* datas, int n);
#endif
struct OptionalMatrix : SkMatrix {
OptionalMatrix(uintptr_t mPtr) {
if (mPtr) {
const SkScalar* nineMatrixValues = reinterpret_cast<const SkScalar*>(mPtr);
this->set9(nineMatrixValues);
}
}
};
SkColor4f ptrToSkColor4f(uintptr_t /* float* */ cPtr) {
float* fourFloats = reinterpret_cast<float*>(cPtr);
SkColor4f color;
memcpy(&color, fourFloats, 4 * sizeof(float));
return color;
}
SkRRect ptrToSkRRect(uintptr_t /* float* */ fPtr) {
// In order, these floats should be 4 floats for the rectangle
// (left, top, right, bottom) and then 8 floats for the radii
// (upper left, upper right, lower right, lower left).
const SkScalar* twelveFloats = reinterpret_cast<const SkScalar*>(fPtr);
const SkRect rect = reinterpret_cast<const SkRect*>(twelveFloats)[0];
const SkVector* radiiValues = reinterpret_cast<const SkVector*>(twelveFloats + 4);
SkRRect rr;
rr.setRectRadii(rect, radiiValues);
return rr;
}
// Surface creation structs and helpers
struct SimpleImageInfo {
int width;
int height;
SkColorType colorType;
SkAlphaType alphaType;
sk_sp<SkColorSpace> colorSpace;
};
SkImageInfo toSkImageInfo(const SimpleImageInfo& sii) {
return SkImageInfo::Make(sii.width, sii.height, sii.colorType, sii.alphaType, sii.colorSpace);
}
#ifdef SK_GL
// Set the pixel format based on the colortype.
// These degrees of freedom are removed from canvaskit only to keep the interface simpler.
struct ColorSettings {
ColorSettings(sk_sp<SkColorSpace> colorSpace) {
if (colorSpace == nullptr || colorSpace->isSRGB()) {
colorType = kRGBA_8888_SkColorType;
pixFormat = GL_RGBA8;
} else {
colorType = kRGBA_F16_SkColorType;
pixFormat = GL_RGBA16F;
}
};
SkColorType colorType;
GrGLenum pixFormat;
};
sk_sp<GrDirectContext> MakeGrContext(EMSCRIPTEN_WEBGL_CONTEXT_HANDLE context)
{
EMSCRIPTEN_RESULT r = emscripten_webgl_make_context_current(context);
if (r < 0) {
printf("failed to make webgl context current %d\n", r);
return nullptr;
}
// setup interface
auto interface = GrGLMakeNativeInterface();
// setup context
return GrDirectContext::MakeGL(interface);
}
sk_sp<SkSurface> MakeOnScreenGLSurface(sk_sp<GrDirectContext> dContext, int width, int height,
sk_sp<SkColorSpace> colorSpace) {
// WebGL should already be clearing the color and stencil buffers, but do it again here to
// ensure Skia receives them in the expected state.
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glClearColor(0, 0, 0, 0);
glClearStencil(0);
glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
dContext->resetContext(kRenderTarget_GrGLBackendState | kMisc_GrGLBackendState);
// The on-screen canvas is FBO 0. Wrap it in a Skia render target so Skia can render to it.
GrGLFramebufferInfo info;
info.fFBOID = 0;
GrGLint sampleCnt;
glGetIntegerv(GL_SAMPLES, &sampleCnt);
GrGLint stencil;
glGetIntegerv(GL_STENCIL_BITS, &stencil);
const auto colorSettings = ColorSettings(colorSpace);
info.fFormat = colorSettings.pixFormat;
GrBackendRenderTarget target(width, height, sampleCnt, stencil, info);
sk_sp<SkSurface> surface(SkSurface::MakeFromBackendRenderTarget(dContext.get(), target,
kBottomLeft_GrSurfaceOrigin, colorSettings.colorType, colorSpace, nullptr));
return surface;
}
sk_sp<SkSurface> MakeRenderTarget(sk_sp<GrDirectContext> dContext, int width, int height) {
SkImageInfo info = SkImageInfo::MakeN32(width, height, SkAlphaType::kPremul_SkAlphaType);
sk_sp<SkSurface> surface(SkSurface::MakeRenderTarget(dContext.get(),
SkBudgeted::kYes,
info, 0,
kBottomLeft_GrSurfaceOrigin,
nullptr, true));
return surface;
}
sk_sp<SkSurface> MakeRenderTarget(sk_sp<GrDirectContext> dContext, SimpleImageInfo sii) {
sk_sp<SkSurface> surface(SkSurface::MakeRenderTarget(dContext.get(),
SkBudgeted::kYes,
toSkImageInfo(sii), 0,
kBottomLeft_GrSurfaceOrigin,
nullptr, true));
return surface;
}
#endif
//========================================================================================
// Path things
//========================================================================================
// All these Apply* methods are simple wrappers to avoid returning an object.
// The default WASM bindings produce code that will leak if a return value
// isn't assigned to a JS variable and has delete() called on it.
// These Apply methods, combined with the smarter binding code allow for chainable
// commands that don't leak if the return value is ignored (i.e. when used intuitively).
void ApplyAddPath(SkPath& orig, const SkPath& newPath,
SkScalar scaleX, SkScalar skewX, SkScalar transX,
SkScalar skewY, SkScalar scaleY, SkScalar transY,
SkScalar pers0, SkScalar pers1, SkScalar pers2,
bool extendPath) {
SkMatrix m = SkMatrix::MakeAll(scaleX, skewX , transX,
skewY , scaleY, transY,
pers0 , pers1 , pers2);
orig.addPath(newPath, m, extendPath ? SkPath::kExtend_AddPathMode :
SkPath::kAppend_AddPathMode);
}
void ApplyArcToTangent(SkPath& p, SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2,
SkScalar radius) {
p.arcTo(x1, y1, x2, y2, radius);
}
void ApplyArcToArcSize(SkPath& orig, SkScalar rx, SkScalar ry, SkScalar xAxisRotate,
bool useSmallArc, bool ccw, SkScalar x, SkScalar y) {
auto arcSize = useSmallArc ? SkPath::ArcSize::kSmall_ArcSize : SkPath::ArcSize::kLarge_ArcSize;
auto sweep = ccw ? SkPathDirection::kCCW : SkPathDirection::kCW;
orig.arcTo(rx, ry, xAxisRotate, arcSize, sweep, x, y);
}
void ApplyRArcToArcSize(SkPath& orig, SkScalar rx, SkScalar ry, SkScalar xAxisRotate,
bool useSmallArc, bool ccw, SkScalar dx, SkScalar dy) {
auto arcSize = useSmallArc ? SkPath::ArcSize::kSmall_ArcSize : SkPath::ArcSize::kLarge_ArcSize;
auto sweep = ccw ? SkPathDirection::kCCW : SkPathDirection::kCW;
orig.rArcTo(rx, ry, xAxisRotate, arcSize, sweep, dx, dy);
}
void ApplyClose(SkPath& p) {
p.close();
}
void ApplyConicTo(SkPath& p, SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2,
SkScalar w) {
p.conicTo(x1, y1, x2, y2, w);
}
void ApplyRConicTo(SkPath& p, SkScalar dx1, SkScalar dy1, SkScalar dx2, SkScalar dy2,
SkScalar w) {
p.rConicTo(dx1, dy1, dx2, dy2, w);
}
void ApplyCubicTo(SkPath& p, SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2,
SkScalar x3, SkScalar y3) {
p.cubicTo(x1, y1, x2, y2, x3, y3);
}
void ApplyRCubicTo(SkPath& p, SkScalar dx1, SkScalar dy1, SkScalar dx2, SkScalar dy2,
SkScalar dx3, SkScalar dy3) {
p.rCubicTo(dx1, dy1, dx2, dy2, dx3, dy3);
}
void ApplyLineTo(SkPath& p, SkScalar x, SkScalar y) {
p.lineTo(x, y);
}
void ApplyRLineTo(SkPath& p, SkScalar dx, SkScalar dy) {
p.rLineTo(dx, dy);
}
void ApplyMoveTo(SkPath& p, SkScalar x, SkScalar y) {
p.moveTo(x, y);
}
void ApplyRMoveTo(SkPath& p, SkScalar dx, SkScalar dy) {
p.rMoveTo(dx, dy);
}
void ApplyReset(SkPath& p) {
p.reset();
}
void ApplyRewind(SkPath& p) {
p.rewind();
}
void ApplyQuadTo(SkPath& p, SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2) {
p.quadTo(x1, y1, x2, y2);
}
void ApplyRQuadTo(SkPath& p, SkScalar dx1, SkScalar dy1, SkScalar dx2, SkScalar dy2) {
p.rQuadTo(dx1, dy1, dx2, dy2);
}
void ApplyTransform(SkPath& orig,
SkScalar scaleX, SkScalar skewX, SkScalar transX,
SkScalar skewY, SkScalar scaleY, SkScalar transY,
SkScalar pers0, SkScalar pers1, SkScalar pers2) {
SkMatrix m = SkMatrix::MakeAll(scaleX, skewX , transX,
skewY , scaleY, transY,
pers0 , pers1 , pers2);
orig.transform(m);
}
#ifdef SK_INCLUDE_PATHOPS
bool ApplySimplify(SkPath& path) {
return Simplify(path, &path);
}
bool ApplyPathOp(SkPath& pathOne, const SkPath& pathTwo, SkPathOp op) {
return Op(pathOne, pathTwo, op, &pathOne);
}
SkPathOrNull MakePathFromOp(const SkPath& pathOne, const SkPath& pathTwo, SkPathOp op) {
SkPath out;
if (Op(pathOne, pathTwo, op, &out)) {
return emscripten::val(out);
}
return emscripten::val::null();
}
#endif
JSString ToSVGString(const SkPath& path) {
SkString s;
SkParsePath::ToSVGString(path, &s);
return emscripten::val(s.c_str());
}
SkPathOrNull MakePathFromSVGString(std::string str) {
SkPath path;
if (SkParsePath::FromSVGString(str.c_str(), &path)) {
return emscripten::val(path);
}
return emscripten::val::null();
}
SkPath CopyPath(const SkPath& a) {
SkPath copy(a);
return copy;
}
bool Equals(const SkPath& a, const SkPath& b) {
return a == b;
}
// =================================================================================
// Creating/Exporting Paths with cmd arrays
// =================================================================================
static const int MOVE = 0;
static const int LINE = 1;
static const int QUAD = 2;
static const int CONIC = 3;
static const int CUBIC = 4;
static const int CLOSE = 5;
JSArray ToCmds(const SkPath& path) {
JSArray cmds = emscripten::val::array();
for (auto [verb, pts, w] : SkPathPriv::Iterate(path)) {
JSArray cmd = emscripten::val::array();
switch (verb) {
case SkPathVerb::kMove:
cmd.call<void>("push", MOVE, pts[0].x(), pts[0].y());
break;
case SkPathVerb::kLine:
cmd.call<void>("push", LINE, pts[1].x(), pts[1].y());
break;
case SkPathVerb::kQuad:
cmd.call<void>("push", QUAD, pts[1].x(), pts[1].y(), pts[2].x(), pts[2].y());
break;
case SkPathVerb::kConic:
cmd.call<void>("push", CONIC,
pts[1].x(), pts[1].y(),
pts[2].x(), pts[2].y(), *w);
break;
case SkPathVerb::kCubic:
cmd.call<void>("push", CUBIC,
pts[1].x(), pts[1].y(),
pts[2].x(), pts[2].y(),
pts[3].x(), pts[3].y());
break;
case SkPathVerb::kClose:
cmd.call<void>("push", CLOSE);
break;
}
cmds.call<void>("push", cmd);
}
return cmds;
}
// This type signature is a mess, but it's necessary. See, we can't use "bind" (EMSCRIPTEN_BINDINGS)
// and pointers to primitive types (Only bound types like SkPoint). We could if we used
// cwrap (see https://becominghuman.ai/passing-and-returning-webassembly-array-parameters-a0f572c65d97)
// but that requires us to stick to C code and, AFAIK, doesn't allow us to return nice things like
// SkPath or SkOpBuilder.
//
// So, basically, if we are using C++ and EMSCRIPTEN_BINDINGS, we can't have primitive pointers
// in our function type signatures. (this gives an error message like "Cannot call foo due to unbound
// types Pi, Pf"). But, we can just pretend they are numbers and cast them to be pointers and
// the compiler is happy.
SkPathOrNull MakePathFromCmds(uintptr_t /* float* */ cptr, int numCmds) {
const auto* cmds = reinterpret_cast<const float*>(cptr);
SkPath path;
float x1, y1, x2, y2, x3, y3;
// if there are not enough arguments, bail with the path we've constructed so far.
#define CHECK_NUM_ARGS(n) \
if ((i + n) > numCmds) { \
SkDebugf("Not enough args to match the verbs. Saw %d commands\n", numCmds); \
return emscripten::val::null(); \
}
for(int i = 0; i < numCmds;){
switch (sk_float_floor2int(cmds[i++])) {
case MOVE:
CHECK_NUM_ARGS(2);
x1 = cmds[i++], y1 = cmds[i++];
path.moveTo(x1, y1);
break;
case LINE:
CHECK_NUM_ARGS(2);
x1 = cmds[i++], y1 = cmds[i++];
path.lineTo(x1, y1);
break;
case QUAD:
CHECK_NUM_ARGS(4);
x1 = cmds[i++], y1 = cmds[i++];
x2 = cmds[i++], y2 = cmds[i++];
path.quadTo(x1, y1, x2, y2);
break;
case CONIC:
CHECK_NUM_ARGS(5);
x1 = cmds[i++], y1 = cmds[i++];
x2 = cmds[i++], y2 = cmds[i++];
x3 = cmds[i++]; // weight
path.conicTo(x1, y1, x2, y2, x3);
break;
case CUBIC:
CHECK_NUM_ARGS(6);
x1 = cmds[i++], y1 = cmds[i++];
x2 = cmds[i++], y2 = cmds[i++];
x3 = cmds[i++], y3 = cmds[i++];
path.cubicTo(x1, y1, x2, y2, x3, y3);
break;
case CLOSE:
path.close();
break;
default:
SkDebugf(" path: UNKNOWN command %f, aborting dump...\n", cmds[i-1]);
return emscripten::val::null();
}
}
#undef CHECK_NUM_ARGS
return emscripten::val(path);
}
void PathAddVerbsPointsWeights(SkPath& path, uintptr_t /* uint8_t* */ verbsPtr, int numVerbs,
uintptr_t /* float* */ ptsPtr, int numPts,
uintptr_t /* float* */ wtsPtr, int numWts) {
const uint8_t* verbs = reinterpret_cast<const uint8_t*>(verbsPtr);
const float* pts = reinterpret_cast<const float*>(ptsPtr);
const float* weights = reinterpret_cast<const float*>(wtsPtr);
#define CHECK_NUM_POINTS(n) \
if ((ptIdx + n) > numPts) { \
SkDebugf("Not enough points to match the verbs. Saw %d points\n", numPts); \
return; \
}
#define CHECK_NUM_WEIGHTS(n) \
if ((wtIdx + n) > numWts) { \
SkDebugf("Not enough weights to match the verbs. Saw %d weights\n", numWts); \
return; \
}
path.incReserve(numPts);
int ptIdx = 0;
int wtIdx = 0;
for (int v = 0; v < numVerbs; ++v) {
switch (verbs[v]) {
case MOVE:
CHECK_NUM_POINTS(2);
path.moveTo(pts[ptIdx], pts[ptIdx+1]);
ptIdx += 2;
break;
case LINE:
CHECK_NUM_POINTS(2);
path.lineTo(pts[ptIdx], pts[ptIdx+1]);
ptIdx += 2;
break;
case QUAD:
CHECK_NUM_POINTS(4);
path.quadTo(pts[ptIdx], pts[ptIdx+1], pts[ptIdx+2], pts[ptIdx+3]);
ptIdx += 4;
break;
case CONIC:
CHECK_NUM_POINTS(4);
CHECK_NUM_WEIGHTS(1);
path.conicTo(pts[ptIdx], pts[ptIdx+1], pts[ptIdx+2], pts[ptIdx+3],
weights[wtIdx]);
ptIdx += 4;
wtIdx++;
break;
case CUBIC:
CHECK_NUM_POINTS(6);
path.cubicTo(pts[ptIdx ], pts[ptIdx+1],
pts[ptIdx+2], pts[ptIdx+3],
pts[ptIdx+4], pts[ptIdx+5]);
ptIdx += 6;
break;
case CLOSE:
path.close();
break;
}
}
#undef CHECK_NUM_POINTS
#undef CHECK_NUM_WEIGHTS
}
SkPath MakePathFromVerbsPointsWeights(uintptr_t /* uint8_t* */ verbsPtr, int numVerbs,
uintptr_t ptsPtr, int numPts,
uintptr_t wtsPtr, int numWts) {
SkPath path;
PathAddVerbsPointsWeights(path, verbsPtr, numVerbs, ptsPtr, numPts, wtsPtr, numWts);
return path;
}
//========================================================================================
// Path Effects
//========================================================================================
bool ApplyDash(SkPath& path, SkScalar on, SkScalar off, SkScalar phase) {
SkScalar intervals[] = { on, off };
auto pe = SkDashPathEffect::Make(intervals, 2, phase);
if (!pe) {
SkDebugf("Invalid args to dash()\n");
return false;
}
SkStrokeRec rec(SkStrokeRec::InitStyle::kHairline_InitStyle);
if (pe->filterPath(&path, path, &rec, nullptr)) {
return true;
}
SkDebugf("Could not make dashed path\n");
return false;
}
bool ApplyTrim(SkPath& path, SkScalar startT, SkScalar stopT, bool isComplement) {
auto mode = isComplement ? SkTrimPathEffect::Mode::kInverted : SkTrimPathEffect::Mode::kNormal;
auto pe = SkTrimPathEffect::Make(startT, stopT, mode);
if (!pe) {
SkDebugf("Invalid args to trim(): startT and stopT must be in [0,1]\n");
return false;
}
SkStrokeRec rec(SkStrokeRec::InitStyle::kHairline_InitStyle);
if (pe->filterPath(&path, path, &rec, nullptr)) {
return true;
}
SkDebugf("Could not trim path\n");
return false;
}
struct StrokeOpts {
// Default values are set in interface.js which allows clients
// to set any number of them. Otherwise, the binding code complains if
// any are omitted.
SkScalar width;
SkScalar miter_limit;
SkPaint::Join join;
SkPaint::Cap cap;
float precision;
};
bool ApplyStroke(SkPath& path, StrokeOpts opts) {
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeCap(opts.cap);
p.setStrokeJoin(opts.join);
p.setStrokeWidth(opts.width);
p.setStrokeMiter(opts.miter_limit);
return p.getFillPath(path, &path, nullptr, opts.precision);
}
// This function is private, we call it in interface.js
void computeTonalColors(uintptr_t cPtrAmbi /* float * */, uintptr_t cPtrSpot /* float * */) {
// private methods accepting colors take pointers to floats already copied into wasm memory.
float* ambiFloats = reinterpret_cast<float*>(cPtrAmbi);
float* spotFloats = reinterpret_cast<float*>(cPtrSpot);
SkColor4f ambiColor = { ambiFloats[0], ambiFloats[1], ambiFloats[2], ambiFloats[3]};
SkColor4f spotColor = { spotFloats[0], spotFloats[1], spotFloats[2], spotFloats[3]};
// This function takes SkColor
SkColor resultAmbi, resultSpot;
SkShadowUtils::ComputeTonalColors(
ambiColor.toSkColor(), spotColor.toSkColor(),
&resultAmbi, &resultSpot);
// Convert back to color4f
const SkColor4f ambi4f = SkColor4f::FromColor(resultAmbi);
const SkColor4f spot4f = SkColor4f::FromColor(resultSpot);
// Re-use the caller's allocated memory to hold the result.
memcpy(ambiFloats, ambi4f.vec(), 4 * sizeof(SkScalar));
memcpy(spotFloats, spot4f.vec(), 4 * sizeof(SkScalar));
}
#ifdef SK_INCLUDE_RUNTIME_EFFECT
struct RuntimeEffectUniform {
int columns;
int rows;
int slot; // the index into the uniforms array that this uniform begins.
bool isInteger;
};
RuntimeEffectUniform fromUniform(const SkRuntimeEffect::Uniform& u) {
RuntimeEffectUniform su;
su.rows = u.count; // arrayLength
su.columns = 1;
su.isInteger = false;
using Type = SkRuntimeEffect::Uniform::Type;
switch (u.type) {
case Type::kFloat: break;
case Type::kFloat2: su.columns = 2; break;
case Type::kFloat3: su.columns = 3; break;
case Type::kFloat4: su.columns = 4; break;
case Type::kFloat2x2: su.columns = 2; su.rows *= 2; break;
case Type::kFloat3x3: su.columns = 3; su.rows *= 3; break;
case Type::kFloat4x4: su.columns = 4; su.rows *= 4; break;
case Type::kInt: su.isInteger = true; break;
case Type::kInt2: su.columns = 2; su.isInteger = true; break;
case Type::kInt3: su.columns = 3; su.isInteger = true; break;
case Type::kInt4: su.columns = 4; su.isInteger = true; break;
}
su.slot = u.offset / sizeof(float);
return su;
}
void castUniforms(void* data, size_t dataLen, const SkRuntimeEffect& effect) {
if (dataLen != effect.uniformSize()) {
// Incorrect number of uniforms. Our code below could read/write off the end of the buffer.
// However, shader creation is going to fail anyway, so just do nothing.
return;
}
float* fltData = reinterpret_cast<float*>(data);
for (const auto& u : effect.uniforms()) {
RuntimeEffectUniform reu = fromUniform(u);
if (reu.isInteger) {
// The SkSL is expecting integers in the uniform data
for (int i = 0; i < reu.columns * reu.rows; ++i) {
int numAsInt = static_cast<int>(fltData[reu.slot + i]);
fltData[reu.slot + i] = SkBits2Float(numAsInt);
}
}
}
}
#endif
// These objects have private destructors / delete methods - I don't think
// we need to do anything other than tell emscripten to do nothing.
namespace emscripten {
namespace internal {
template<typename ClassType>
void raw_destructor(ClassType *);
template<>
void raw_destructor<SkContourMeasure>(SkContourMeasure *ptr) {
}
template<>
void raw_destructor<SkVertices>(SkVertices *ptr) {
}
#ifndef SK_NO_FONTS
template<>
void raw_destructor<SkTextBlob>(SkTextBlob *ptr) {
}
template<>
void raw_destructor<SkTypeface>(SkTypeface *ptr) {
}
#endif
}
}
// toBytes returns a Uint8Array that has a copy of the data in the given SkData.
Uint8Array toBytes(sk_sp<SkData> data) {
// By making the copy using the JS transliteration, we don't risk the SkData object being
// cleaned up before we make the copy.
return emscripten::val(
// https://emscripten.org/docs/porting/connecting_cpp_and_javascript/embind.html#memory-views
typed_memory_view(data->size(), data->bytes())
).call<Uint8Array>("slice"); // slice with no args makes a copy of the memory view.
}
// Some signatures below have uintptr_t instead of a pointer to a primitive
// type (e.g. SkScalar). This is necessary because we can't use "bind" (EMSCRIPTEN_BINDINGS)
// and pointers to primitive types (Only bound types like SkPoint). We could if we used
// cwrap (see https://becominghuman.ai/passing-and-returning-webassembly-array-parameters-a0f572c65d97)
// but that requires us to stick to C code and, AFAIK, doesn't allow us to return nice things like
// SkPath or SkCanvas.
//
// So, basically, if we are using C++ and EMSCRIPTEN_BINDINGS, we can't have primitive pointers
// in our function type signatures. (this gives an error message like "Cannot call foo due to unbound
// types Pi, Pf"). But, we can just pretend they are numbers and cast them to be pointers and
// the compiler is happy.
EMSCRIPTEN_BINDINGS(Skia) {
#ifdef SK_GL
function("currentContext", &emscripten_webgl_get_current_context);
function("setCurrentContext", &emscripten_webgl_make_context_current);
function("MakeGrContext", &MakeGrContext);
function("MakeOnScreenGLSurface", &MakeOnScreenGLSurface);
function("MakeRenderTarget", select_overload<sk_sp<SkSurface>(sk_sp<GrDirectContext>, int, int)>(&MakeRenderTarget));
function("MakeRenderTarget", select_overload<sk_sp<SkSurface>(sk_sp<GrDirectContext>, SimpleImageInfo)>(&MakeRenderTarget));
constant("gpu", true);
#endif
function("getDecodeCacheLimitBytes", &SkResourceCache::GetTotalByteLimit);
function("setDecodeCacheLimitBytes", &SkResourceCache::SetTotalByteLimit);
function("getDecodeCacheUsedBytes" , &SkResourceCache::GetTotalBytesUsed);
function("_computeTonalColors", &computeTonalColors);
function("_decodeAnimatedImage", optional_override([](uintptr_t /* uint8_t* */ iptr,
size_t length)->sk_sp<SkAnimatedImage> {
uint8_t* imgData = reinterpret_cast<uint8_t*>(iptr);
auto bytes = SkData::MakeFromMalloc(imgData, length);
auto aCodec = SkAndroidCodec::MakeFromData(std::move(bytes));
if (nullptr == aCodec) {
return nullptr;
}
return SkAnimatedImage::Make(std::move(aCodec));
}), allow_raw_pointers());
function("_decodeImage", optional_override([](uintptr_t /* uint8_t* */ iptr,
size_t length)->sk_sp<SkImage> {
uint8_t* imgData = reinterpret_cast<uint8_t*>(iptr);
sk_sp<SkData> bytes = SkData::MakeFromMalloc(imgData, length);
return SkImage::MakeFromEncoded(std::move(bytes));
}), allow_raw_pointers());
// These won't be called directly, there are corresponding JS helpers to deal with arrays.
function("_MakeImage", optional_override([](SimpleImageInfo ii,
uintptr_t /* uint8_t* */ pPtr, int plen,
size_t rowBytes)->sk_sp<SkImage> {
uint8_t* pixels = reinterpret_cast<uint8_t*>(pPtr);
SkImageInfo info = toSkImageInfo(ii);
sk_sp<SkData> pixelData = SkData::MakeFromMalloc(pixels, plen);
return SkImage::MakeRasterData(info, pixelData, rowBytes);
}), allow_raw_pointers());
function("_getShadowLocalBounds", optional_override([](
uintptr_t /* float* */ ctmPtr, const SkPath& path,
uintptr_t /* float* */ zPlaneParamPtr, uintptr_t /* float* */ lightPosPtr,
SkScalar lightRadius, uint32_t flags, uintptr_t /* SkRect* */ outPtr) -> bool {
SkMatrix ctm;
const SkScalar* nineMatrixValues = reinterpret_cast<const SkScalar*>(ctmPtr);
ctm.set9(nineMatrixValues);
const SkVector3* zPlaneParams = reinterpret_cast<const SkVector3*>(zPlaneParamPtr);
const SkVector3* lightPos = reinterpret_cast<const SkVector3*>(lightPosPtr);
SkRect* outputBounds = reinterpret_cast<SkRect*>(outPtr);
return SkShadowUtils::GetLocalBounds(ctm, path, *zPlaneParams, *lightPos, lightRadius,
flags, outputBounds);
}));
#ifdef SK_SERIALIZE_SKP
function("_MakePicture", optional_override([](uintptr_t /* unint8_t* */ dPtr,
size_t bytes)->sk_sp<SkPicture> {
uint8_t* d = reinterpret_cast<uint8_t*>(dPtr);
sk_sp<SkData> data = SkData::MakeFromMalloc(d, bytes);
return SkPicture::MakeFromData(data.get(), nullptr);
}), allow_raw_pointers());
#endif
#ifdef SK_GL
class_<GrDirectContext>("GrDirectContext")
.smart_ptr<sk_sp<GrDirectContext>>("sk_sp<GrDirectContext>")
.function("getResourceCacheLimitBytes",
optional_override([](GrDirectContext& self)->size_t {
int maxResources = 0;// ignored
size_t currMax = 0;
self.getResourceCacheLimits(&maxResources, &currMax);
return currMax;
}))
.function("getResourceCacheUsageBytes",
optional_override([](GrDirectContext& self)->size_t {
int usedResources = 0;// ignored
size_t currUsage = 0;
self.getResourceCacheUsage(&usedResources, &currUsage);
return currUsage;
}))
.function("releaseResourcesAndAbandonContext",
&GrDirectContext::releaseResourcesAndAbandonContext)
.function("setResourceCacheLimitBytes",
optional_override([](GrDirectContext& self, size_t maxResourceBytes)->void {
int maxResources = 0;
size_t currMax = 0; // ignored
self.getResourceCacheLimits(&maxResources, &currMax);
self.setResourceCacheLimits(maxResources, maxResourceBytes);
}));
#endif
class_<SkAnimatedImage>("AnimatedImage")
.smart_ptr<sk_sp<SkAnimatedImage>>("sk_sp<AnimatedImage>")
.function("decodeNextFrame", &SkAnimatedImage::decodeNextFrame)
// Deprecated; prefer makeImageAtCurrentFrame
.function("getCurrentFrame", &SkAnimatedImage::getCurrentFrame)
.function("getFrameCount", &SkAnimatedImage::getFrameCount)
.function("getRepetitionCount", &SkAnimatedImage::getRepetitionCount)
.function("height", optional_override([](SkAnimatedImage& self)->int32_t {
// getBounds returns an SkRect, but internally, the width and height are ints.
return SkScalarFloorToInt(self.getBounds().height());
}))
.function("makeImageAtCurrentFrame", &SkAnimatedImage::getCurrentFrame)
.function("reset", &SkAnimatedImage::reset)
.function("width", optional_override([](SkAnimatedImage& self)->int32_t {
return SkScalarFloorToInt(self.getBounds().width());
}));
class_<SkCanvas>("Canvas")
.constructor<>()
.function("_clear", optional_override([](SkCanvas& self, uintptr_t /* float* */ cPtr) {
self.clear(ptrToSkColor4f(cPtr));
}))
.function("clipPath", select_overload<void (const SkPath&, SkClipOp, bool)>(&SkCanvas::clipPath))
.function("_clipRRect", optional_override([](SkCanvas& self, uintptr_t /* float* */ fPtr, SkClipOp op, bool doAntiAlias) {
self.clipRRect(ptrToSkRRect(fPtr), op, doAntiAlias);
}))
.function("_clipRect", optional_override([](SkCanvas& self, uintptr_t /* float* */ fPtr, SkClipOp op, bool doAntiAlias) {
const SkRect* rect = reinterpret_cast<const SkRect*>(fPtr);
self.clipRect(*rect, op, doAntiAlias);
}))
.function("_concat", optional_override([](SkCanvas& self, uintptr_t /* SkScalar* */ mPtr) {
//TODO(skbug.com/10108): make the JS side be column major.
const SkScalar* sixteenMatrixValues = reinterpret_cast<const SkScalar*>(mPtr);
SkM44 m = SkM44::RowMajor(sixteenMatrixValues);
self.concat(m);
}))
.function("_drawArc", optional_override([](SkCanvas& self, uintptr_t /* float* */ fPtr,
SkScalar startAngle, SkScalar sweepAngle,
bool useCenter, const SkPaint& paint) {
const SkRect* oval = reinterpret_cast<const SkRect*>(fPtr);
self.drawArc(*oval, startAngle, sweepAngle, useCenter, paint);
}))
.function("_drawAtlasOptions", optional_override([](SkCanvas& self,
const sk_sp<SkImage>& atlas, uintptr_t /* SkRSXform* */ xptr,
uintptr_t /* SkRect* */ rptr, uintptr_t /* SkColor* */ cptr, int count,
SkBlendMode mode, SkFilterMode filter, SkMipmapMode mipmap,
const SkPaint* paint)->void {
const SkRSXform* dstXforms = reinterpret_cast<const SkRSXform*>(xptr);
const SkRect* srcRects = reinterpret_cast<const SkRect*>(rptr);
const SkColor* colors = nullptr;
if (cptr) {
colors = reinterpret_cast<const SkColor*>(cptr);
}
SkSamplingOptions sampling(filter, mipmap);
self.drawAtlas(atlas.get(), dstXforms, srcRects, colors, count, mode, sampling,
nullptr, paint);
}), allow_raw_pointers())
.function("_drawAtlasCubic", optional_override([](SkCanvas& self,
const sk_sp<SkImage>& atlas, uintptr_t /* SkRSXform* */ xptr,
uintptr_t /* SkRect* */ rptr, uintptr_t /* SkColor* */ cptr, int count,
SkBlendMode mode, float B, float C, const SkPaint* paint)->void {
const SkRSXform* dstXforms = reinterpret_cast<const SkRSXform*>(xptr);
const SkRect* srcRects = reinterpret_cast<const SkRect*>(rptr);
const SkColor* colors = nullptr;
if (cptr) {
colors = reinterpret_cast<const SkColor*>(cptr);
}
SkSamplingOptions sampling({B, C});
self.drawAtlas(atlas.get(), dstXforms, srcRects, colors, count, mode, sampling,
nullptr, paint);
}), allow_raw_pointers())
.function("drawCircle", select_overload<void (SkScalar, SkScalar, SkScalar, const SkPaint& paint)>(&SkCanvas::drawCircle))
.function("_drawColor", optional_override([](SkCanvas& self, uintptr_t /* float* */ cPtr) {
self.drawColor(ptrToSkColor4f(cPtr));
}))
.function("_drawColor", optional_override([](SkCanvas& self, uintptr_t /* float* */ cPtr, SkBlendMode mode) {
self.drawColor(ptrToSkColor4f(cPtr), mode);
}))
.function("drawColorInt", optional_override([](SkCanvas& self, SkColor color) {
self.drawColor(color);
}))
.function("drawColorInt", optional_override([](SkCanvas& self, SkColor color, SkBlendMode mode) {
self.drawColor(color, mode);
}))
.function("_drawDRRect", optional_override([](SkCanvas& self, uintptr_t /* float* */ outerPtr,
uintptr_t /* float* */ innerPtr, const SkPaint& paint) {
self.drawDRRect(ptrToSkRRect(outerPtr), ptrToSkRRect(innerPtr), paint);
}))
.function("_drawGlyphs", optional_override([](SkCanvas& self,
int count,
uintptr_t /* uint16_t* */ glyphs,
uintptr_t /* SkPoint* */ positions,
float x, float y,
const SkFont& font,
const SkPaint& paint)->void {
self.drawGlyphs(count,
reinterpret_cast<const uint16_t*>(glyphs),
reinterpret_cast<const SkPoint*>(positions),
{x, y}, font, paint);
}))
// TODO: deprecate this version, and require sampling
.function("drawImage", optional_override([](SkCanvas& self, const sk_sp<SkImage>& image,
SkScalar x, SkScalar y, const SkPaint* paint) {
SkSamplingOptions sampling(paint ? paint->getFilterQuality()
: kNone_SkFilterQuality);
self.drawImage(image.get(), x, y, sampling, paint);
}), allow_raw_pointers())
.function("drawImageCubic", optional_override([](SkCanvas& self, const sk_sp<SkImage>& img,
SkScalar left, SkScalar top,
float B, float C, // See SkSamplingOptions.h for docs.
const SkPaint* paint)->void {
self.drawImage(img.get(), left, top, SkSamplingOptions({B, C}), paint);
}), allow_raw_pointers())
.function("drawImageOptions", optional_override([](SkCanvas& self, const sk_sp<SkImage>& img,
SkScalar left, SkScalar top,
SkFilterMode filter, SkMipmapMode mipmap,
const SkPaint* paint)->void {
self.drawImage(img.get(), left, top, {filter, mipmap}, paint);
}), allow_raw_pointers())
.function("drawImageAtCurrentFrame", optional_override([](SkCanvas& self, sk_sp<SkAnimatedImage> aImg,
SkScalar left, SkScalar top, const SkPaint* paint)->void {
auto img = aImg->getCurrentFrame();
SkSamplingOptions sampling(paint ? paint->getFilterQuality()
: kNone_SkFilterQuality);
self.drawImage(img, left, top, sampling, paint);
}), allow_raw_pointers())
.function("_drawImageNine", optional_override([](SkCanvas& self, const sk_sp<SkImage>& image,
uintptr_t /* int* */ centerPtr, uintptr_t /* float* */ dstPtr,
SkFilterMode filter, const SkPaint* paint)->void {
const SkIRect* center = reinterpret_cast<const SkIRect*>(centerPtr);
const SkRect* dst = reinterpret_cast<const SkRect*>(dstPtr);
self.drawImageNine(image.get(), *center, *dst, filter, paint);
}), allow_raw_pointers())
// TODO: deprecate this version, and require sampling
.function("_drawImageRect", optional_override([](SkCanvas& self, const sk_sp<SkImage>& image,
uintptr_t /* float* */ srcPtr, uintptr_t /* float* */ dstPtr,
const SkPaint* paint, bool fastSample)->void {
const SkRect* src = reinterpret_cast<const SkRect*>(srcPtr);
const SkRect* dst = reinterpret_cast<const SkRect*>(dstPtr);
SkSamplingOptions sampling(paint ? paint->getFilterQuality()
: kNone_SkFilterQuality);
self.drawImageRect(image, *src, *dst, sampling, paint,
fastSample ? SkCanvas::kFast_SrcRectConstraint:
SkCanvas::kStrict_SrcRectConstraint);
}), allow_raw_pointers())
.function("_drawImageRectCubic", optional_override([](SkCanvas& self, const sk_sp<SkImage>& image,
uintptr_t /* float* */ srcPtr, uintptr_t /* float* */ dstPtr,
float B, float C, // See SkSamplingOptions.h for docs.
const SkPaint* paint)->void {
const SkRect* src = reinterpret_cast<const SkRect*>(srcPtr);
const SkRect* dst = reinterpret_cast<const SkRect*>(dstPtr);
auto constraint = SkCanvas::kStrict_SrcRectConstraint; // TODO: get from caller
self.drawImageRect(image.get(), *src, *dst, SkSamplingOptions({B, C}), paint, constraint);
}), allow_raw_pointers())
.function("_drawImageRectOptions", optional_override([](SkCanvas& self, const sk_sp<SkImage>& image,
uintptr_t /* float* */ srcPtr, uintptr_t /* float* */ dstPtr,
SkFilterMode filter, SkMipmapMode mipmap,
const SkPaint* paint)->void {
const SkRect* src = reinterpret_cast<const SkRect*>(srcPtr);
const SkRect* dst = reinterpret_cast<const SkRect*>(dstPtr);
auto constraint = SkCanvas::kStrict_SrcRectConstraint; // TODO: get from caller
self.drawImageRect(image.get(), *src, *dst, {filter, mipmap}, paint, constraint);
}), allow_raw_pointers())
.function("drawLine", select_overload<void (SkScalar, SkScalar, SkScalar, SkScalar, const SkPaint&)>(&SkCanvas::drawLine))
.function("_drawOval", optional_override([](SkCanvas& self, uintptr_t /* float* */ fPtr,
const SkPaint& paint)->void {
const SkRect* oval = reinterpret_cast<const SkRect*>(fPtr);
self.drawOval(*oval, paint);
}))
.function("drawPaint", &SkCanvas::drawPaint)
#ifdef SK_INCLUDE_PARAGRAPH
.function("drawParagraph", optional_override([](SkCanvas& self, skia::textlayout::Paragraph* p,
SkScalar x, SkScalar y) {
p->paint(&self, x, y);
}), allow_raw_pointers())
#endif
.function("drawPath", &SkCanvas::drawPath)
.function("_drawPatch", optional_override([](SkCanvas& self,
uintptr_t /* SkPoint* */ cubics,
uintptr_t /* SkColor* */ colors,
uintptr_t /* SkPoint* */ texs,
SkBlendMode mode,
const SkPaint& paint)->void {
self.drawPatch(reinterpret_cast<const SkPoint*>(cubics),
reinterpret_cast<const SkColor*>(colors),
reinterpret_cast<const SkPoint*>(texs),
mode, paint);
}))
// Of note, picture is *not* what is colloquially thought of as a "picture", what we call
// a bitmap. An SkPicture is a series of draw commands.
.function("drawPicture", select_overload<void (const sk_sp<SkPicture>&)>(&SkCanvas::drawPicture))
.function("_drawPoints", optional_override([](SkCanvas& self, SkCanvas::PointMode mode,
uintptr_t /* SkPoint* */ pptr,
int count, SkPaint& paint)->void {
const SkPoint* pts = reinterpret_cast<const SkPoint*>(pptr);
self.drawPoints(mode, count, pts, paint);
}))
.function("_drawRRect",optional_override([](SkCanvas& self, uintptr_t /* float* */ fPtr, const SkPaint& paint) {
self.drawRRect(ptrToSkRRect(fPtr), paint);
}))
.function("_drawRect", optional_override([](SkCanvas& self, uintptr_t /* float* */ fPtr,
const SkPaint& paint)->void {
const SkRect* rect = reinterpret_cast<const SkRect*>(fPtr);
self.drawRect(*rect, paint);
}))
.function("drawRect4f", optional_override([](SkCanvas& self, SkScalar left, SkScalar top,
SkScalar right, SkScalar bottom,
const SkPaint& paint)->void {
const SkRect rect = SkRect::MakeLTRB(left, top, right, bottom);
self.drawRect(rect, paint);
}))
.function("_drawShadow", optional_override([](SkCanvas& self, const SkPath& path,
uintptr_t /* float* */ zPlaneParamPtr,
uintptr_t /* float* */ lightPosPtr,
SkScalar lightRadius,
uintptr_t /* float* */ ambientColorPtr,
uintptr_t /* float* */ spotColorPtr,
uint32_t flags) {
const SkVector3* zPlaneParams = reinterpret_cast<const SkVector3*>(zPlaneParamPtr);
const SkVector3* lightPos = reinterpret_cast<const SkVector3*>(lightPosPtr);
SkShadowUtils::DrawShadow(&self, path, *zPlaneParams, *lightPos, lightRadius,
ptrToSkColor4f(ambientColorPtr).toSkColor(),
ptrToSkColor4f(spotColorPtr).toSkColor(),
flags);
}))
#ifndef SK_NO_FONTS
.function("_drawSimpleText", optional_override([](SkCanvas& self, uintptr_t /* char* */ sptr,
size_t len, SkScalar x, SkScalar y, const SkFont& font,
const SkPaint& paint) {
const char* str = reinterpret_cast<const char*>(sptr);
self.drawSimpleText(str, len, SkTextEncoding::kUTF8, x, y, font, paint);
}))
.function("drawTextBlob", select_overload<void (const sk_sp<SkTextBlob>&, SkScalar, SkScalar, const SkPaint&)>(&SkCanvas::drawTextBlob))
#endif
.function("drawVertices", select_overload<void (const sk_sp<SkVertices>&, SkBlendMode, const SkPaint&)>(&SkCanvas::drawVertices))
.function("_findMarkedCTM", optional_override([](SkCanvas& self, std::string marker, uintptr_t /* SkScalar* */ mPtr) -> bool {
SkScalar* sixteenMatrixValues = reinterpret_cast<SkScalar*>(mPtr);
if (!sixteenMatrixValues) {
return false; // matrix cannot be null
}
SkM44 m;
if (self.findMarkedCTM(marker.c_str(), &m)) {
m.getRowMajor(sixteenMatrixValues);
return true;
}
return false;
}))
.function("flush", &SkCanvas::flush) // Deprecated - will be removed
// 4x4 matrix functions
// Just like with getTotalMatrix, we allocate the buffer for the 16 floats to go in from
// interface.js, so it can also free them when its done.
.function("_getLocalToDevice", optional_override([](const SkCanvas& self, uintptr_t /* SkScalar* */ mPtr) {
SkScalar* sixteenMatrixValues = reinterpret_cast<SkScalar*>(mPtr);
if (!sixteenMatrixValues) {
return; // matrix cannot be null
}
SkM44 m = self.getLocalToDevice();
m.getRowMajor(sixteenMatrixValues);
}))
.function("getSaveCount", &SkCanvas::getSaveCount)
// We allocate room for the matrix from the JS side and free it there so as to not have
// an awkward moment where we malloc something here and "just know" to free it on the
// JS side.
.function("_getTotalMatrix", optional_override([](const SkCanvas& self, uintptr_t /* uint8_t* */ mPtr) {
SkScalar* nineMatrixValues = reinterpret_cast<SkScalar*>(mPtr);
if (!nineMatrixValues) {
return; // matrix cannot be null
}
SkMatrix m = self.getTotalMatrix();
m.get9(nineMatrixValues);
}))
.function("makeSurface", optional_override([](SkCanvas& self, SimpleImageInfo sii)->sk_sp<SkSurface> {
return self.makeSurface(toSkImageInfo(sii), nullptr);
}), allow_raw_pointers())
.function("markCTM", optional_override([](SkCanvas& self, std::string marker) {
self.markCTM(marker.c_str());
}))
.function("_readPixels", optional_override([](SkCanvas& self, SimpleImageInfo di,
uintptr_t /* uint8_t* */ pPtr,
size_t dstRowBytes, int srcX, int srcY) {
uint8_t* pixels = reinterpret_cast<uint8_t*>(pPtr);
SkImageInfo dstInfo = toSkImageInfo(di);
return self.readPixels(dstInfo, pixels, dstRowBytes, srcX, srcY);
}))
.function("restore", &SkCanvas::restore)
.function("restoreToCount", &SkCanvas::restoreToCount)
.function("rotate", select_overload<void (SkScalar, SkScalar, SkScalar)>(&SkCanvas::rotate))
.function("save", &SkCanvas::save)
.function("_saveLayer", optional_override([](SkCanvas& self, const SkPaint* p, uintptr_t /* float* */ fPtr,
const SkImageFilter* backdrop, SkCanvas::SaveLayerFlags flags)->int {
SkRect* bounds = reinterpret_cast<SkRect*>(fPtr);
return self.saveLayer(SkCanvas::SaveLayerRec(bounds, p, backdrop, flags));
}), allow_raw_pointers())
.function("saveLayerPaint", optional_override([](SkCanvas& self, const SkPaint p)->int {
return self.saveLayer(SkCanvas::SaveLayerRec(nullptr, &p, 0));
}))
.function("scale", &SkCanvas::scale)
.function("skew", &SkCanvas::skew)
.function("translate", &SkCanvas::translate)
.function("_writePixels", optional_override([](SkCanvas& self, SimpleImageInfo di,
uintptr_t /* uint8_t* */ pPtr,
size_t srcRowBytes, int dstX, int dstY) {
uint8_t* pixels = reinterpret_cast<uint8_t*>(pPtr);
SkImageInfo dstInfo = toSkImageInfo(di);
return self.writePixels(dstInfo, pixels, srcRowBytes, dstX, dstY);
}));
class_<SkColorFilter>("ColorFilter")
.smart_ptr<sk_sp<SkColorFilter>>("sk_sp<ColorFilter>>")
.class_function("_MakeBlend", optional_override([](uintptr_t /* float* */ cPtr, SkBlendMode mode)->sk_sp<SkColorFilter> {
return SkColorFilters::Blend(ptrToSkColor4f(cPtr).toSkColor(), mode);
}))
.class_function("MakeCompose", &SkColorFilters::Compose)
.class_function("MakeLerp", &SkColorFilters::Lerp)
.class_function("MakeLinearToSRGBGamma", &SkColorFilters::LinearToSRGBGamma)
.class_function("_makeMatrix", optional_override([](uintptr_t /* float* */ fPtr) {
float* twentyFloats = reinterpret_cast<float*>(fPtr);
return SkColorFilters::Matrix(twentyFloats);
}))
.class_function("MakeSRGBToLinearGamma", &SkColorFilters::SRGBToLinearGamma);
class_<SkContourMeasureIter>("ContourMeasureIter")
.constructor<const SkPath&, bool, SkScalar>()
.function("next", &SkContourMeasureIter::next);
class_<SkContourMeasure>("ContourMeasure")
.smart_ptr<sk_sp<SkContourMeasure>>("sk_sp<ContourMeasure>>")
.function("_getPosTan", optional_override([](SkContourMeasure& self,
SkScalar distance,
uintptr_t /* SkPoint* */ oPtr) -> void {
SkPoint* pointAndVector = reinterpret_cast<SkPoint*>(oPtr);
if (!self.getPosTan(distance, pointAndVector, pointAndVector + 1)) {
SkDebugf("zero-length path in getPosTan\n");
}
}))
.function("getSegment", optional_override([](SkContourMeasure& self, SkScalar startD,
SkScalar stopD, bool startWithMoveTo) -> SkPath {
SkPath p;
bool ok = self.getSegment(startD, stopD, &p, startWithMoveTo);
if (ok) {
return p;
}
return SkPath();
}))
.function("isClosed", &SkContourMeasure::isClosed)
.function("length", &SkContourMeasure::length);
#ifndef SK_NO_FONTS
class_<SkFont>("Font")
.constructor<>()
.constructor<sk_sp<SkTypeface>>()
.constructor<sk_sp<SkTypeface>, SkScalar>()
.constructor<sk_sp<SkTypeface>, SkScalar, SkScalar, SkScalar>()
.function("_getGlyphWidthBounds", optional_override([](SkFont& self, uintptr_t /* SkGlyphID* */ gPtr,
int numGlyphs, uintptr_t /* float* */ wPtr,
uintptr_t /* float* */ rPtr,
SkPaint* paint) {
const SkGlyphID* glyphs = reinterpret_cast<const SkGlyphID*>(gPtr);
// On the JS side only one of these is set at a time for easier ergonomics.
SkRect* outputRects = reinterpret_cast<SkRect*>(rPtr);
SkScalar* outputWidths = reinterpret_cast<SkScalar*>(wPtr);
self.getWidthsBounds(glyphs, numGlyphs, outputWidths, outputRects, paint);
}), allow_raw_pointers())
.function("_getGlyphIDs", optional_override([](SkFont& self, uintptr_t /* char* */ sptr,
size_t strLen, size_t expectedCodePoints,
uintptr_t /* SkGlyphID* */ iPtr) -> int {
char* str = reinterpret_cast<char*>(sptr);
SkGlyphID* glyphIDs = reinterpret_cast<SkGlyphID*>(iPtr);
int actualCodePoints = self.textToGlyphs(str, strLen, SkTextEncoding::kUTF8,
glyphIDs, expectedCodePoints);
return actualCodePoints;
}))
.function("getMetrics", optional_override([](SkFont& self) -> JSObject {
SkFontMetrics fm;
self.getMetrics(&fm);
JSObject j = emscripten::val::object();
j.set("ascent", fm.fAscent);
j.set("descent", fm.fDescent);
j.set("leading", fm.fLeading);
if (!(fm.fFlags & SkFontMetrics::kBoundsInvalid_Flag)) {
const float rect[] = {
fm.fXMin, fm.fTop, fm.fXMax, fm.fBottom
};
j.set("bounds", MakeTypedArray(4, rect, "Float32Array"));
}
return j;
}))
.function("getScaleX", &SkFont::getScaleX)
.function("getSize", &SkFont::getSize)
.function("getSkewX", &SkFont::getSkewX)
.function("isEmbolden", &SkFont::isEmbolden)
.function("getTypeface", &SkFont::getTypeface, allow_raw_pointers())
.function("setEdging", &SkFont::setEdging)
.function("setEmbeddedBitmaps", &SkFont::setEmbeddedBitmaps)
.function("setHinting", &SkFont::setHinting)
.function("setLinearMetrics", &SkFont::setLinearMetrics)
.function("setScaleX", &SkFont::setScaleX)
.function("setSize", &SkFont::setSize)
.function("setSkewX", &SkFont::setSkewX)
.function("setEmbolden", &SkFont::setEmbolden)
.function("setSubpixel", &SkFont::setSubpixel)
.function("setTypeface", &SkFont::setTypeface, allow_raw_pointers());
class_<SkFontMgr>("FontMgr")
.smart_ptr<sk_sp<SkFontMgr>>("sk_sp<FontMgr>")
.class_function("_fromData", optional_override([](uintptr_t /* uint8_t** */ dPtr,
uintptr_t /* size_t* */ sPtr,
int numFonts)->sk_sp<SkFontMgr> {
auto datas = reinterpret_cast<const uint8_t**>(dPtr);
auto sizes = reinterpret_cast<const size_t*>(sPtr);
std::unique_ptr<sk_sp<SkData>[]> skdatas(new sk_sp<SkData>[numFonts]);
for (int i = 0; i < numFonts; ++i) {
skdatas[i] = SkData::MakeFromMalloc(datas[i], sizes[i]);
}
return SkFontMgr_New_Custom_Data(skdatas.get(), numFonts);
}), allow_raw_pointers())
.class_function("RefDefault", &SkFontMgr::RefDefault)
.function("countFamilies", &SkFontMgr::countFamilies)
.function("getFamilyName", optional_override([](SkFontMgr& self, int index)->JSString {
if (index < 0 || index >= self.countFamilies()) {
return emscripten::val::null();
}
SkString s;
self.getFamilyName(index, &s);
return emscripten::val(s.c_str());
}))
#ifdef SK_DEBUG
.function("dumpFamilies", optional_override([](SkFontMgr& self) {
int numFam = self.countFamilies();
SkDebugf("There are %d font families\n", numFam);
for (int i = 0 ; i< numFam; i++) {
SkString s;
self.getFamilyName(i, &s);
SkDebugf("\t%s\n", s.c_str());
}
}))
#endif
.function("_makeTypefaceFromData", optional_override([](SkFontMgr& self,
uintptr_t /* uint8_t* */ fPtr,
int flen)->sk_sp<SkTypeface> {
uint8_t* font = reinterpret_cast<uint8_t*>(fPtr);
sk_sp<SkData> fontData = SkData::MakeFromMalloc(font, flen);
return self.makeFromData(fontData);
}), allow_raw_pointers());
#endif // SK_NO_FONTS
class_<SkImage>("Image")
.smart_ptr<sk_sp<SkImage>>("sk_sp<Image>")
// Note that this needs to be cleaned up with delete().
.function("getColorSpace", optional_override([](sk_sp<SkImage> self)->sk_sp<SkColorSpace> {
return self->imageInfo().refColorSpace();
}), allow_raw_pointers())
.function("getImageInfo", optional_override([](sk_sp<SkImage> self)->JSObject {
// We cannot return a SimpleImageInfo because the colorspace object would be leaked.
JSObject result = emscripten::val::object();
SkImageInfo ii = self->imageInfo();
result.set("alphaType", ii.alphaType());
result.set("colorType", ii.colorType());
result.set("height", ii.height());
result.set("width", ii.width());
return result;
}))
.function("height", &SkImage::height)
.function("encodeToBytes", optional_override([](sk_sp<SkImage> self) -> Uint8Array {
sk_sp<SkData> data = self->encodeToData();
if (!data) {
return emscripten::val::null();
}
return toBytes(data);
}))
.function("encodeToBytes", optional_override([](sk_sp<SkImage> self,
SkEncodedImageFormat fmt, int quality) -> Uint8Array {
sk_sp<SkData> data = self->encodeToData(fmt, quality);
if (!data) {
return emscripten::val::null();
}
return toBytes(data);
}))
.function("makeCopyWithDefaultMipmaps", optional_override([](sk_sp<SkImage> self)->sk_sp<SkImage> {
return self->withDefaultMipmaps();
}))
.function("_makeShaderCubic", optional_override([](sk_sp<SkImage> self,
SkTileMode tx, SkTileMode ty,
float B, float C, // See SkSamplingOptions.h for docs.
uintptr_t /* SkScalar* */ mPtr)->sk_sp<SkShader> {
return self->makeShader(tx, ty, SkSamplingOptions({B, C}), OptionalMatrix(mPtr));
}), allow_raw_pointers())
.function("_makeShaderOptions", optional_override([](sk_sp<SkImage> self,
SkTileMode tx, SkTileMode ty,
SkFilterMode filter, SkMipmapMode mipmap,
uintptr_t /* SkScalar* */ mPtr)->sk_sp<SkShader> {
return self->makeShader(tx, ty, {filter, mipmap}, OptionalMatrix(mPtr));
}), allow_raw_pointers())
.function("_readPixels", optional_override([](sk_sp<SkImage> self,
SimpleImageInfo sii, uintptr_t /* uint8_t* */ pPtr,
size_t dstRowBytes, int srcX, int srcY)->bool {
uint8_t* pixels = reinterpret_cast<uint8_t*>(pPtr);
SkImageInfo ii = toSkImageInfo(sii);
// TODO(adlai) Migrate CanvasKit API to require DirectContext arg here.
GrDirectContext* dContext = nullptr;
#ifdef SK_GL
dContext = GrAsDirectContext(as_IB(self.get())->context());
#endif
return self->readPixels(dContext, ii, pixels, dstRowBytes, srcX, srcY);
}), allow_raw_pointers())
.function("width", &SkImage::width);
class_<SkImageFilter>("ImageFilter")
.smart_ptr<sk_sp<SkImageFilter>>("sk_sp<ImageFilter>")
.class_function("MakeBlur", optional_override([](SkScalar sigmaX, SkScalar sigmaY,
SkTileMode tileMode, sk_sp<SkImageFilter> input)->sk_sp<SkImageFilter> {
return SkImageFilters::Blur(sigmaX, sigmaY, tileMode, input);
}))
.class_function("MakeColorFilter", optional_override([](sk_sp<SkColorFilter> cf,
sk_sp<SkImageFilter> input)->sk_sp<SkImageFilter> {
return SkImageFilters::ColorFilter(cf, input);
}))
.class_function("MakeCompose", &SkImageFilters::Compose)
.class_function("_MakeMatrixTransform", optional_override([](uintptr_t /* SkScalar* */ mPtr, SkFilterQuality fq,
sk_sp<SkImageFilter> input)->sk_sp<SkImageFilter> {
OptionalMatrix matr(mPtr);
// TODO(kjlubick): pass in sampling directly from client
auto sampling = SkSamplingOptions(fq, SkSamplingOptions::kMedium_asMipmapLinear);
return SkImageFilters::MatrixTransform(matr, sampling, input);
}));
class_<SkMaskFilter>("MaskFilter")
.smart_ptr<sk_sp<SkMaskFilter>>("sk_sp<MaskFilter>")
.class_function("MakeBlur", optional_override([](SkBlurStyle style, SkScalar sigma, bool respectCTM)->sk_sp<SkMaskFilter> {
// Adds a little helper because emscripten doesn't expose default params.
return SkMaskFilter::MakeBlur(style, sigma, respectCTM);
}), allow_raw_pointers());
class_<SkPaint>("Paint")
.constructor<>()
.function("copy", optional_override([](const SkPaint& self)->SkPaint {
SkPaint p(self);
return p;
}))
.function("getBlendMode", &SkPaint::getBlendMode)
// provide an allocated place to put the returned color
.function("_getColor", optional_override([](SkPaint& self, uintptr_t /* float* */ cPtr)->void {
const SkColor4f& c = self.getColor4f();
float* fourFloats = reinterpret_cast<float*>(cPtr);
memcpy(fourFloats, c.vec(), 4 * sizeof(SkScalar));
}))
.function("getFilterQuality", &SkPaint::getFilterQuality)
.function("getStrokeCap", &SkPaint::getStrokeCap)
.function("getStrokeJoin", &SkPaint::getStrokeJoin)
.function("getStrokeMiter", &SkPaint::getStrokeMiter)
.function("getStrokeWidth", &SkPaint::getStrokeWidth)
.function("setAntiAlias", &SkPaint::setAntiAlias)
.function("setAlphaf", &SkPaint::setAlphaf)
.function("setBlendMode", &SkPaint::setBlendMode)
.function("_setColor", optional_override([](SkPaint& self, uintptr_t /* float* */ cPtr,
sk_sp<SkColorSpace> colorSpace) {
self.setColor(ptrToSkColor4f(cPtr), colorSpace.get());
}))
.function("setColorInt", optional_override([](SkPaint& self, SkColor color) {
self.setColor(SkColor4f::FromColor(color), nullptr);
}))
.function("setColorInt", optional_override([](SkPaint& self, SkColor color,
sk_sp<SkColorSpace> colorSpace) {
self.setColor(SkColor4f::FromColor(color), colorSpace.get());
}))
.function("setColorFilter", &SkPaint::setColorFilter)
.function("setFilterQuality", &SkPaint::setFilterQuality)
.function("setImageFilter", &SkPaint::setImageFilter)
.function("setMaskFilter", &SkPaint::setMaskFilter)
.function("setPathEffect", &SkPaint::setPathEffect)
.function("setShader", &SkPaint::setShader)
.function("setStrokeCap", &SkPaint::setStrokeCap)
.function("setStrokeJoin", &SkPaint::setStrokeJoin)
.function("setStrokeMiter", &SkPaint::setStrokeMiter)
.function("setStrokeWidth", &SkPaint::setStrokeWidth)
.function("setStyle", &SkPaint::setStyle);
class_<SkColorSpace>("ColorSpace")
.smart_ptr<sk_sp<SkColorSpace>>("sk_sp<ColorSpace>")
.class_function("Equals", optional_override([](sk_sp<SkColorSpace> a, sk_sp<SkColorSpace> b)->bool {
return SkColorSpace::Equals(a.get(), b.get());
}))
// These are private because they are to be called once in interface.js to
// avoid clients having to delete the returned objects.
.class_function("_MakeSRGB", &SkColorSpace::MakeSRGB)
.class_function("_MakeDisplayP3", optional_override([]()->sk_sp<SkColorSpace> {
return SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, SkNamedGamut::kDisplayP3);
}))
.class_function("_MakeAdobeRGB", optional_override([]()->sk_sp<SkColorSpace> {
return SkColorSpace::MakeRGB(SkNamedTransferFn::k2Dot2, SkNamedGamut::kAdobeRGB);
}));
class_<SkPathEffect>("PathEffect")
.smart_ptr<sk_sp<SkPathEffect>>("sk_sp<PathEffect>")
.class_function("MakeCorner", &SkCornerPathEffect::Make)
.class_function("_MakeDash", optional_override([](uintptr_t /* float* */ cptr, int count,
SkScalar phase)->sk_sp<SkPathEffect> {
const float* intervals = reinterpret_cast<const float*>(cptr);
return SkDashPathEffect::Make(intervals, count, phase);
}), allow_raw_pointers())
.class_function("MakeDiscrete", &SkDiscretePathEffect::Make);
// TODO(kjlubick, reed) Make SkPath immutable and only creatable via a factory/builder.
class_<SkPath>("Path")
.constructor<>()
#ifdef SK_INCLUDE_PATHOPS
.class_function("MakeFromOp", &MakePathFromOp)
#endif
.class_function("MakeFromSVGString", &MakePathFromSVGString)
.class_function("_MakeFromCmds", &MakePathFromCmds)
.class_function("_MakeFromVerbsPointsWeights", &MakePathFromVerbsPointsWeights)
.function("_addArc", optional_override([](SkPath& self,
uintptr_t /* float* */ fPtr,
SkScalar startAngle, SkScalar sweepAngle)->void {
const SkRect* oval = reinterpret_cast<const SkRect*>(fPtr);
self.addArc(*oval, startAngle, sweepAngle);
}))
.function("_addOval", optional_override([](SkPath& self,
uintptr_t /* float* */ fPtr,
bool ccw, unsigned start)->void {
const SkRect* oval = reinterpret_cast<const SkRect*>(fPtr);
self.addOval(*oval, ccw ? SkPathDirection::kCCW : SkPathDirection::kCW, start);
}))
// interface.js has 3 overloads of addPath
.function("_addPath", &ApplyAddPath)
.function("_addPoly", optional_override([](SkPath& self,
uintptr_t /* SkPoint* */ fPtr,
int count, bool close)->void {
const SkPoint* pts = reinterpret_cast<const SkPoint*>(fPtr);
self.addPoly(pts, count, close);
}))
.function("_addRect", optional_override([](SkPath& self,
uintptr_t /* float* */ fPtr,
bool ccw)->void {
const SkRect* rect = reinterpret_cast<const SkRect*>(fPtr);
self.addRect(*rect, ccw ? SkPathDirection::kCCW : SkPathDirection::kCW);
}))
.function("_addRRect", optional_override([](SkPath& self,
uintptr_t /* float* */ fPtr,
bool ccw)->void {
self.addRRect(ptrToSkRRect(fPtr), ccw ? SkPathDirection::kCCW : SkPathDirection::kCW);
}))
.function("_addVerbsPointsWeights", &PathAddVerbsPointsWeights)
.function("_arcToOval", optional_override([](SkPath& self,
uintptr_t /* float* */ fPtr, SkScalar startAngle,
SkScalar sweepAngle, bool forceMoveTo)->void {
const SkRect* oval = reinterpret_cast<const SkRect*>(fPtr);
self.arcTo(*oval, startAngle, sweepAngle, forceMoveTo);
}))
.function("_arcToRotated", &ApplyArcToArcSize)
.function("_arcToTangent", ApplyArcToTangent)
.function("_close", &ApplyClose)
.function("_conicTo", &ApplyConicTo)
.function("countPoints", &SkPath::countPoints)
.function("contains", &SkPath::contains)
.function("_cubicTo", &ApplyCubicTo)
.function("_getPoint", optional_override([](SkPath& self, int index,
uintptr_t /* float* */ oPtr)->void {
SkPoint* output = reinterpret_cast<SkPoint*>(oPtr);
*output = self.getPoint(index);
}))
.function("isEmpty", &SkPath::isEmpty)
.function("isVolatile", &SkPath::isVolatile)
.function("_lineTo", &ApplyLineTo)
.function("_moveTo", &ApplyMoveTo)
.function("_quadTo", &ApplyQuadTo)
.function("_rArcTo", &ApplyRArcToArcSize)
.function("_rConicTo", &ApplyRConicTo)
.function("_rCubicTo", &ApplyRCubicTo)
.function("_rLineTo", &ApplyRLineTo)
.function("_rMoveTo", &ApplyRMoveTo)
.function("_rQuadTo", &ApplyRQuadTo)
.function("reset", &ApplyReset)
.function("rewind", &ApplyRewind)
.function("setIsVolatile", &SkPath::setIsVolatile)
.function("_transform", select_overload<void(SkPath&, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar)>(&ApplyTransform))
// PathEffects
.function("_dash", &ApplyDash)
.function("_trim", &ApplyTrim)
.function("_stroke", &ApplyStroke)
#ifdef SK_INCLUDE_PATHOPS
// PathOps
.function("_simplify", &ApplySimplify)
.function("_op", &ApplyPathOp)
#endif
// Exporting
.function("toSVGString", &ToSVGString)
.function("toCmds", &ToCmds)
.function("setFillType", select_overload<void(SkPathFillType)>(&SkPath::setFillType))
.function("getFillType", &SkPath::getFillType)
.function("_getBounds", optional_override([](SkPath& self,
uintptr_t /* float* */ fPtr)->void {
SkRect* output = reinterpret_cast<SkRect*>(fPtr);
output[0] = self.getBounds();
}))
.function("_computeTightBounds", optional_override([](SkPath& self,
uintptr_t /* float* */ fPtr)->void {
SkRect* output = reinterpret_cast<SkRect*>(fPtr);
output[0] = self.computeTightBounds();
}))
.function("equals", &Equals)
.function("copy", &CopyPath)
#ifdef SK_DEBUG
.function("dump", select_overload<void() const>(&SkPath::dump))
.function("dumpHex", select_overload<void() const>(&SkPath::dumpHex))
#endif
;
class_<SkPictureRecorder>("PictureRecorder")
.constructor<>()
.function("_beginRecording", optional_override([](SkPictureRecorder& self,
uintptr_t /* float* */ fPtr) -> SkCanvas* {
SkRect* bounds = reinterpret_cast<SkRect*>(fPtr);
return self.beginRecording(*bounds, nullptr);
}), allow_raw_pointers())
.function("finishRecordingAsPicture", optional_override([](SkPictureRecorder& self)
-> sk_sp<SkPicture> {
return self.finishRecordingAsPicture();
}), allow_raw_pointers());
class_<SkPicture>("Picture")
.smart_ptr<sk_sp<SkPicture>>("sk_sp<Picture>")
#ifdef SK_SERIALIZE_SKP
// The serialized format of an SkPicture (informally called an "skp"), is not something
// that clients should ever rely on. The format may change at anytime and no promises
// are made for backwards or forward compatibility.
.function("serialize", optional_override([](SkPicture& self) -> Uint8Array {
// Emscripten doesn't play well with optional arguments, which we don't
// want to expose anyway.
sk_sp<SkData> data = self.serialize();
if (!data) {
return emscripten::val::null();
}
return toBytes(data);
}), allow_raw_pointers())
#endif
;
class_<SkShader>("Shader")
.smart_ptr<sk_sp<SkShader>>("sk_sp<Shader>")
.class_function("MakeBlend", select_overload<sk_sp<SkShader>(SkBlendMode, sk_sp<SkShader>, sk_sp<SkShader>)>(&SkShaders::Blend))
.class_function("_MakeColor",
optional_override([](uintptr_t /* float* */ cPtr, sk_sp<SkColorSpace> colorSpace)->sk_sp<SkShader> {
return SkShaders::Color(ptrToSkColor4f(cPtr), colorSpace);
})
)
.class_function("MakeLerp", select_overload<sk_sp<SkShader>(float, sk_sp<SkShader>, sk_sp<SkShader>)>(&SkShaders::Lerp))
.class_function("MakeFractalNoise", optional_override([](
SkScalar baseFreqX, SkScalar baseFreqY,
int numOctaves, SkScalar seed,
int tileW, int tileH)->sk_sp<SkShader> {
// if tileSize is empty (e.g. tileW <= 0 or tileH <= 0, it will be ignored.
SkISize tileSize = SkISize::Make(tileW, tileH);
return SkPerlinNoiseShader::MakeFractalNoise(baseFreqX, baseFreqY,
numOctaves, seed, &tileSize);
}))
// Here and in other gradient functions, cPtr is a pointer to an array of data
// representing colors. whether this is an array of SkColor or SkColor4f is indicated
// by the colorType argument. Only RGBA_8888 and RGBA_F32 are accepted.
.class_function("_MakeLinearGradient", optional_override([](
uintptr_t /* SkPoint* */ fourFloatsPtr,
uintptr_t cPtr, SkColorType colorType,
uintptr_t /* SkScalar* */ pPtr,
int count, SkTileMode mode, uint32_t flags,
uintptr_t /* SkScalar* */ mPtr,
sk_sp<SkColorSpace> colorSpace)->sk_sp<SkShader> {
const SkPoint* points = reinterpret_cast<const SkPoint*>(fourFloatsPtr);
const SkScalar* positions = reinterpret_cast<const SkScalar*>(pPtr);
OptionalMatrix localMatrix(mPtr);
if (colorType == SkColorType::kRGBA_F32_SkColorType) {
const SkColor4f* colors = reinterpret_cast<const SkColor4f*>(cPtr);
return SkGradientShader::MakeLinear(points, colors, colorSpace, positions, count,
mode, flags, &localMatrix);
} else if (colorType == SkColorType::kRGBA_8888_SkColorType) {
const SkColor* colors = reinterpret_cast<const SkColor*>(cPtr);
return SkGradientShader::MakeLinear(points, colors, positions, count,
mode, flags, &localMatrix);
}
SkDebugf("%d is not an accepted colorType\n", colorType);
return nullptr;
}), allow_raw_pointers())
.class_function("_MakeRadialGradient", optional_override([](
SkScalar cx, SkScalar cy, SkScalar radius,
uintptr_t cPtr, SkColorType colorType,
uintptr_t /* SkScalar* */ pPtr,
int count, SkTileMode mode, uint32_t flags,
uintptr_t /* SkScalar* */ mPtr,
sk_sp<SkColorSpace> colorSpace)->sk_sp<SkShader> {
const SkScalar* positions = reinterpret_cast<const SkScalar*>(pPtr);
OptionalMatrix localMatrix(mPtr);
if (colorType == SkColorType::kRGBA_F32_SkColorType) {
const SkColor4f* colors = reinterpret_cast<const SkColor4f*>(cPtr);
return SkGradientShader::MakeRadial({cx, cy}, radius, colors, colorSpace,
positions, count, mode, flags, &localMatrix);
} else if (colorType == SkColorType::kRGBA_8888_SkColorType) {
const SkColor* colors = reinterpret_cast<const SkColor*>(cPtr);
return SkGradientShader::MakeRadial({cx, cy}, radius, colors, positions,
count, mode, flags, &localMatrix);
}
SkDebugf("%d is not an accepted colorType\n", colorType);
return nullptr;
}), allow_raw_pointers())
.class_function("_MakeSweepGradient", optional_override([](SkScalar cx, SkScalar cy,
uintptr_t cPtr, SkColorType colorType,
uintptr_t /* SkScalar* */ pPtr,
int count, SkTileMode mode,
SkScalar startAngle, SkScalar endAngle,
uint32_t flags,
uintptr_t /* SkScalar* */ mPtr,
sk_sp<SkColorSpace> colorSpace)->sk_sp<SkShader> {
const SkScalar* positions = reinterpret_cast<const SkScalar*>(pPtr);
OptionalMatrix localMatrix(mPtr);
if (colorType == SkColorType::kRGBA_F32_SkColorType) {
const SkColor4f* colors = reinterpret_cast<const SkColor4f*>(cPtr);
return SkGradientShader::MakeSweep(cx, cy, colors, colorSpace, positions, count,
mode, startAngle, endAngle, flags,
&localMatrix);
} else if (colorType == SkColorType::kRGBA_8888_SkColorType) {
const SkColor* colors = reinterpret_cast<const SkColor*>(cPtr);
return SkGradientShader::MakeSweep(cx, cy, colors, positions, count,
mode, startAngle, endAngle, flags,
&localMatrix);
}
SkDebugf("%d is not an accepted colorType\n", colorType);
return nullptr;
}), allow_raw_pointers())
.class_function("MakeTurbulence", optional_override([](
SkScalar baseFreqX, SkScalar baseFreqY,
int numOctaves, SkScalar seed,
int tileW, int tileH)->sk_sp<SkShader> {
// if tileSize is empty (e.g. tileW <= 0 or tileH <= 0, it will be ignored.
SkISize tileSize = SkISize::Make(tileW, tileH);
return SkPerlinNoiseShader::MakeTurbulence(baseFreqX, baseFreqY,
numOctaves, seed, &tileSize);
}))
.class_function("_MakeTwoPointConicalGradient", optional_override([](
uintptr_t /* SkPoint* */ fourFloatsPtr,
SkScalar startRadius, SkScalar endRadius,
uintptr_t cPtr, SkColorType colorType,
uintptr_t /* SkScalar* */ pPtr,
int count, SkTileMode mode, uint32_t flags,
uintptr_t /* SkScalar* */ mPtr,
sk_sp<SkColorSpace> colorSpace)->sk_sp<SkShader> {
const SkPoint* startAndEnd = reinterpret_cast<const SkPoint*>(fourFloatsPtr);
const SkScalar* positions = reinterpret_cast<const SkScalar*>(pPtr);
OptionalMatrix localMatrix(mPtr);
if (colorType == SkColorType::kRGBA_F32_SkColorType) {
const SkColor4f* colors = reinterpret_cast<const SkColor4f*>(cPtr);
return SkGradientShader::MakeTwoPointConical(startAndEnd[0], startRadius,
startAndEnd[1], endRadius,
colors, colorSpace, positions, count, mode,
flags, &localMatrix);
} else if (colorType == SkColorType::kRGBA_8888_SkColorType) {
const SkColor* colors = reinterpret_cast<const SkColor*>(cPtr);
return SkGradientShader::MakeTwoPointConical(startAndEnd[0], startRadius,
startAndEnd[1], endRadius,
colors, positions, count, mode,
flags, &localMatrix);
}
SkDebugf("%d is not an accepted colorType\n", colorType);
return nullptr;
}), allow_raw_pointers());
#ifdef SK_INCLUDE_RUNTIME_EFFECT
class_<SkRuntimeEffect>("RuntimeEffect")
.smart_ptr<sk_sp<SkRuntimeEffect>>("sk_sp<RuntimeEffect>")
.class_function("_Make", optional_override([](std::string sksl,
emscripten::val errHandler
)->sk_sp<SkRuntimeEffect> {
SkString s(sksl.c_str(), sksl.length());
auto [effect, errorText] = SkRuntimeEffect::MakeForShader(s);
if (!effect) {
errHandler.call<void>("onError", val(errorText.c_str()));
return nullptr;
}
return effect;
}))
.function("_makeShader", optional_override([](SkRuntimeEffect& self, uintptr_t fPtr, size_t fLen, bool isOpaque,
uintptr_t /* SkScalar* */ mPtr)->sk_sp<SkShader> {
void* inputData = reinterpret_cast<void*>(fPtr);
castUniforms(inputData, fLen, self);
sk_sp<SkData> inputs = SkData::MakeFromMalloc(inputData, fLen);
OptionalMatrix localMatrix(mPtr);
return self.makeShader(inputs, nullptr, 0, &localMatrix, isOpaque);
}))
.function("_makeShaderWithChildren", optional_override([](SkRuntimeEffect& self, uintptr_t fPtr, size_t fLen, bool isOpaque,
uintptr_t /** SkShader*[] */cPtrs, size_t cLen,
uintptr_t /* SkScalar* */ mPtr)->sk_sp<SkShader> {
void* inputData = reinterpret_cast<void*>(fPtr);
castUniforms(inputData, fLen, self);
sk_sp<SkData> inputs = SkData::MakeFromMalloc(inputData, fLen);
sk_sp<SkShader>* children = new sk_sp<SkShader>[cLen];
SkShader** childrenPtrs = reinterpret_cast<SkShader**>(cPtrs);
for (size_t i = 0; i < cLen; i++) {
// This bare pointer was already part of an sk_sp (owned outside of here),
// so we want to ref the new sk_sp so makeShader doesn't clean it up.
children[i] = sk_ref_sp<SkShader>(childrenPtrs[i]);
}
OptionalMatrix localMatrix(mPtr);
auto s = self.makeShader(inputs, children, cLen, &localMatrix, isOpaque);
delete[] children;
return s;
}))
.function("getUniformCount", optional_override([](SkRuntimeEffect& self)->int {
return self.uniforms().count();
}))
.function("getUniformFloatCount", optional_override([](SkRuntimeEffect& self)->int {
return self.uniformSize() / sizeof(float);
}))
.function("getUniformName", optional_override([](SkRuntimeEffect& self, int i)->JSString {
auto it = self.uniforms().begin() + i;
return emscripten::val(it->name.c_str());
}))
.function("getUniform", optional_override([](SkRuntimeEffect& self, int i)->RuntimeEffectUniform {
auto it = self.uniforms().begin() + i;
RuntimeEffectUniform su = fromUniform(*it);
return su;
}));
value_object<RuntimeEffectUniform>("RuntimeEffectUniform")
.field("columns", &RuntimeEffectUniform::columns)
.field("rows", &RuntimeEffectUniform::rows)
.field("slot", &RuntimeEffectUniform::slot)
.field("isInteger", &RuntimeEffectUniform::isInteger);
constant("rt_effect", true);
#endif
class_<SkSurface>("Surface")
.smart_ptr<sk_sp<SkSurface>>("sk_sp<Surface>")
.class_function("_makeRasterDirect", optional_override([](const SimpleImageInfo ii,
uintptr_t /* uint8_t* */ pPtr,
size_t rowBytes)->sk_sp<SkSurface> {
uint8_t* pixels = reinterpret_cast<uint8_t*>(pPtr);
SkImageInfo imageInfo = toSkImageInfo(ii);
return SkSurface::MakeRasterDirect(imageInfo, pixels, rowBytes, nullptr);
}), allow_raw_pointers())
.function("_flush", optional_override([](SkSurface& self) {
self.flushAndSubmit(false);
}))
.function("getCanvas", &SkSurface::getCanvas, allow_raw_pointers())
.function("imageInfo", optional_override([](SkSurface& self)->SimpleImageInfo {
const auto& ii = self.imageInfo();
return {ii.width(), ii.height(), ii.colorType(), ii.alphaType(), ii.refColorSpace()};
}))
.function("height", &SkSurface::height)
.function("_makeImageSnapshot", optional_override([](SkSurface& self, uintptr_t /* int* */ iPtr)->sk_sp<SkImage> {
SkIRect* bounds = reinterpret_cast<SkIRect*>(iPtr);
if (!bounds) {
return self.makeImageSnapshot();
}
return self.makeImageSnapshot(*bounds);
}))
.function("makeSurface", optional_override([](SkSurface& self, SimpleImageInfo sii)->sk_sp<SkSurface> {
return self.makeSurface(toSkImageInfo(sii));
}), allow_raw_pointers())
#ifdef SK_GL
.function("reportBackendTypeIsGPU", optional_override([](SkSurface& self) -> bool {
return self.getCanvas()->recordingContext() != nullptr;
}))
.function("sampleCnt", optional_override([](SkSurface& self)->int {
auto backendRT = self.getBackendRenderTarget(SkSurface::kFlushRead_BackendHandleAccess);
return (backendRT.isValid()) ? backendRT.sampleCnt() : 0;
}))
#else
.function("reportBackendTypeIsGPU", optional_override([](SkSurface& self) -> bool {
return false;
}))
#endif
.function("width", &SkSurface::width);
#ifndef SK_NO_FONTS
class_<SkTextBlob>("TextBlob")
.smart_ptr<sk_sp<SkTextBlob>>("sk_sp<TextBlob>")
.class_function("_MakeFromRSXform", optional_override([](uintptr_t /* char* */ sptr,
size_t strBtyes,
uintptr_t /* SkRSXform* */ xptr,
const SkFont& font)->sk_sp<SkTextBlob> {
const char* str = reinterpret_cast<const char*>(sptr);
const SkRSXform* xforms = reinterpret_cast<const SkRSXform*>(xptr);
return SkTextBlob::MakeFromRSXform(str, strBtyes, xforms, font, SkTextEncoding::kUTF8);
}), allow_raw_pointers())
.class_function("_MakeFromRSXformGlyphs", optional_override([](uintptr_t /* SkGlyphID* */ gPtr,
size_t byteLen,
uintptr_t /* SkRSXform* */ xptr,
const SkFont& font)->sk_sp<SkTextBlob> {
const SkGlyphID* glyphs = reinterpret_cast<const SkGlyphID*>(gPtr);
const SkRSXform* xforms = reinterpret_cast<const SkRSXform*>(xptr);
return SkTextBlob::MakeFromRSXform(glyphs, byteLen, xforms, font, SkTextEncoding::kGlyphID);
}), allow_raw_pointers())
.class_function("_MakeFromText", optional_override([](uintptr_t /* char* */ sptr,
size_t len, const SkFont& font)->sk_sp<SkTextBlob> {
const char* str = reinterpret_cast<const char*>(sptr);
return SkTextBlob::MakeFromText(str, len, font, SkTextEncoding::kUTF8);
}), allow_raw_pointers())
.class_function("_MakeFromGlyphs", optional_override([](uintptr_t /* SkGlyphID* */ gPtr,
size_t byteLen, const SkFont& font)->sk_sp<SkTextBlob> {
const SkGlyphID* glyphs = reinterpret_cast<const SkGlyphID*>(gPtr);
return SkTextBlob::MakeFromText(glyphs, byteLen, font, SkTextEncoding::kGlyphID);
}), allow_raw_pointers());
class_<SkTypeface>("Typeface")
.smart_ptr<sk_sp<SkTypeface>>("sk_sp<Typeface>");
#endif
class_<SkVertices>("Vertices")
.smart_ptr<sk_sp<SkVertices>>("sk_sp<Vertices>")
.function("_bounds", optional_override([](SkVertices& self,
uintptr_t /* float* */ fPtr)->void {
SkRect* output = reinterpret_cast<SkRect*>(fPtr);
output[0] = self.bounds();
}))
.function("uniqueID", &SkVertices::uniqueID);
// Not intended to be called directly by clients
class_<SkVertices::Builder>("_VerticesBuilder")
.constructor<SkVertices::VertexMode, int, int, uint32_t>()
.function("colors", optional_override([](SkVertices::Builder& self)->uintptr_t /* SkColor* */{
// Emscripten won't let us return bare pointers, but we can return ints just fine.
return reinterpret_cast<uintptr_t>(self.colors());
}))
.function("detach", &SkVertices::Builder::detach)
.function("indices", optional_override([](SkVertices::Builder& self)->uintptr_t /* uint16_t* */{
// Emscripten won't let us return bare pointers, but we can return ints just fine.
return reinterpret_cast<uintptr_t>(self.indices());
}))
.function("positions", optional_override([](SkVertices::Builder& self)->uintptr_t /* SkPoint* */{
// Emscripten won't let us return bare pointers, but we can return ints just fine.
return reinterpret_cast<uintptr_t>(self.positions());
}))
.function("texCoords", optional_override([](SkVertices::Builder& self)->uintptr_t /* SkPoint* */{
// Emscripten won't let us return bare pointers, but we can return ints just fine.
return reinterpret_cast<uintptr_t>(self.texCoords());
}));
enum_<SkAlphaType>("AlphaType")
.value("Opaque", SkAlphaType::kOpaque_SkAlphaType)
.value("Premul", SkAlphaType::kPremul_SkAlphaType)
.value("Unpremul", SkAlphaType::kUnpremul_SkAlphaType);
enum_<SkBlendMode>("BlendMode")
.value("Clear", SkBlendMode::kClear)
.value("Src", SkBlendMode::kSrc)
.value("Dst", SkBlendMode::kDst)
.value("SrcOver", SkBlendMode::kSrcOver)
.value("DstOver", SkBlendMode::kDstOver)
.value("SrcIn", SkBlendMode::kSrcIn)
.value("DstIn", SkBlendMode::kDstIn)
.value("SrcOut", SkBlendMode::kSrcOut)
.value("DstOut", SkBlendMode::kDstOut)
.value("SrcATop", SkBlendMode::kSrcATop)
.value("DstATop", SkBlendMode::kDstATop)
.value("Xor", SkBlendMode::kXor)
.value("Plus", SkBlendMode::kPlus)
.value("Modulate", SkBlendMode::kModulate)
.value("Screen", SkBlendMode::kScreen)
.value("Overlay", SkBlendMode::kOverlay)
.value("Darken", SkBlendMode::kDarken)
.value("Lighten", SkBlendMode::kLighten)
.value("ColorDodge", SkBlendMode::kColorDodge)
.value("ColorBurn", SkBlendMode::kColorBurn)
.value("HardLight", SkBlendMode::kHardLight)
.value("SoftLight", SkBlendMode::kSoftLight)
.value("Difference", SkBlendMode::kDifference)
.value("Exclusion", SkBlendMode::kExclusion)
.value("Multiply", SkBlendMode::kMultiply)
.value("Hue", SkBlendMode::kHue)
.value("Saturation", SkBlendMode::kSaturation)
.value("Color", SkBlendMode::kColor)
.value("Luminosity", SkBlendMode::kLuminosity);
enum_<SkBlurStyle>("BlurStyle")
.value("Normal", SkBlurStyle::kNormal_SkBlurStyle)
.value("Solid", SkBlurStyle::kSolid_SkBlurStyle)
.value("Outer", SkBlurStyle::kOuter_SkBlurStyle)
.value("Inner", SkBlurStyle::kInner_SkBlurStyle);
enum_<SkClipOp>("ClipOp")
.value("Difference", SkClipOp::kDifference)
.value("Intersect", SkClipOp::kIntersect);
enum_<SkColorType>("ColorType")
.value("Alpha_8", SkColorType::kAlpha_8_SkColorType)
.value("RGB_565", SkColorType::kRGB_565_SkColorType)
.value("RGBA_8888", SkColorType::kRGBA_8888_SkColorType)
.value("BGRA_8888", SkColorType::kBGRA_8888_SkColorType)
.value("RGBA_1010102", SkColorType::kRGBA_1010102_SkColorType)
.value("RGB_101010x", SkColorType::kRGB_101010x_SkColorType)
.value("Gray_8", SkColorType::kGray_8_SkColorType)
.value("RGBA_F16", SkColorType::kRGBA_F16_SkColorType)
.value("RGBA_F32", SkColorType::kRGBA_F32_SkColorType);
enum_<SkPathFillType>("FillType")
.value("Winding", SkPathFillType::kWinding)
.value("EvenOdd", SkPathFillType::kEvenOdd);
enum_<SkFilterMode>("FilterMode")
.value("Nearest", SkFilterMode::kNearest)
.value("Linear", SkFilterMode::kLinear);
enum_<SkFilterQuality>("FilterQuality")
.value("None", SkFilterQuality::kNone_SkFilterQuality)
.value("Low", SkFilterQuality::kLow_SkFilterQuality)
.value("Medium", SkFilterQuality::kMedium_SkFilterQuality)
.value("High", SkFilterQuality::kHigh_SkFilterQuality);
// Only used to control the encode function.
// TODO(kjlubick): compile these out when the appropriate encoder is disabled.
enum_<SkEncodedImageFormat>("ImageFormat")
.value("PNG", SkEncodedImageFormat::kPNG)
.value("JPEG", SkEncodedImageFormat::kJPEG)
.value("WEBP", SkEncodedImageFormat::kWEBP);
enum_<SkMipmapMode>("MipmapMode")
.value("None", SkMipmapMode::kNone)
.value("Nearest", SkMipmapMode::kNearest)
.value("Linear", SkMipmapMode::kLinear);
enum_<SkPaint::Style>("PaintStyle")
.value("Fill", SkPaint::Style::kFill_Style)
.value("Stroke", SkPaint::Style::kStroke_Style);
#ifdef SK_INCLUDE_PATHOPS
enum_<SkPathOp>("PathOp")
.value("Difference", SkPathOp::kDifference_SkPathOp)
.value("Intersect", SkPathOp::kIntersect_SkPathOp)
.value("Union", SkPathOp::kUnion_SkPathOp)
.value("XOR", SkPathOp::kXOR_SkPathOp)
.value("ReverseDifference", SkPathOp::kReverseDifference_SkPathOp);
#endif
enum_<SkCanvas::PointMode>("PointMode")
.value("Points", SkCanvas::PointMode::kPoints_PointMode)
.value("Lines", SkCanvas::PointMode::kLines_PointMode)
.value("Polygon", SkCanvas::PointMode::kPolygon_PointMode);
enum_<SkPaint::Cap>("StrokeCap")
.value("Butt", SkPaint::Cap::kButt_Cap)
.value("Round", SkPaint::Cap::kRound_Cap)
.value("Square", SkPaint::Cap::kSquare_Cap);
enum_<SkPaint::Join>("StrokeJoin")
.value("Miter", SkPaint::Join::kMiter_Join)
.value("Round", SkPaint::Join::kRound_Join)
.value("Bevel", SkPaint::Join::kBevel_Join);
#ifndef SK_NO_FONTS
enum_<SkFontHinting>("FontHinting")
.value("None", SkFontHinting::kNone)
.value("Slight", SkFontHinting::kSlight)
.value("Normal", SkFontHinting::kNormal)
.value("Full", SkFontHinting::kFull);
enum_<SkFont::Edging>("FontEdging")
#ifndef CANVASKIT_NO_ALIAS_FONT
.value("Alias", SkFont::Edging::kAlias)
#endif
.value("AntiAlias", SkFont::Edging::kAntiAlias)
.value("SubpixelAntiAlias", SkFont::Edging::kSubpixelAntiAlias);
#endif
enum_<SkTileMode>("TileMode")
.value("Clamp", SkTileMode::kClamp)
.value("Repeat", SkTileMode::kRepeat)
.value("Mirror", SkTileMode::kMirror)
.value("Decal", SkTileMode::kDecal);
enum_<SkVertices::VertexMode>("VertexMode")
.value("Triangles", SkVertices::VertexMode::kTriangles_VertexMode)
.value("TrianglesStrip", SkVertices::VertexMode::kTriangleStrip_VertexMode)
.value("TriangleFan", SkVertices::VertexMode::kTriangleFan_VertexMode);
// A value object is much simpler than a class - it is returned as a JS
// object and does not require delete().
// https://emscripten.org/docs/porting/connecting_cpp_and_javascript/embind.html#value-types
value_object<SimpleImageInfo>("ImageInfo")
.field("width", &SimpleImageInfo::width)
.field("height", &SimpleImageInfo::height)
.field("colorType", &SimpleImageInfo::colorType)
.field("alphaType", &SimpleImageInfo::alphaType)
.field("colorSpace", &SimpleImageInfo::colorSpace);
value_object<StrokeOpts>("StrokeOpts")
.field("width", &StrokeOpts::width)
.field("miter_limit", &StrokeOpts::miter_limit)
.field("join", &StrokeOpts::join)
.field("cap", &StrokeOpts::cap)
.field("precision", &StrokeOpts::precision);
constant("MOVE_VERB", MOVE);
constant("LINE_VERB", LINE);
constant("QUAD_VERB", QUAD);
constant("CONIC_VERB", CONIC);
constant("CUBIC_VERB", CUBIC);
constant("CLOSE_VERB", CLOSE);
constant("SaveLayerInitWithPrevious", (int)SkCanvas::SaveLayerFlagsSet::kInitWithPrevious_SaveLayerFlag);
constant("SaveLayerF16ColorType", (int)SkCanvas::SaveLayerFlagsSet::kF16ColorType);
constant("ShadowTransparentOccluder", (int)SkShadowFlags::kTransparentOccluder_ShadowFlag);
constant("ShadowGeometricOnly", (int)SkShadowFlags::kGeometricOnly_ShadowFlag);
constant("ShadowDirectionalLight", (int)SkShadowFlags::kDirectionalLight_ShadowFlag);
constant("_GlyphRunFlags_isWhiteSpace", (int)skia::textlayout::Paragraph::kWhiteSpace_VisitorFlag);
}
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