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#undef LOG_TAG
#define LOG_TAG "ShaderJNI"
#include "GraphicsJNI.h"
#include "SkColorFilter.h"
#include "SkGradientShader.h"
#include "SkImagePriv.h"
#include "SkShader.h"
#include "SkBlendMode.h"
#include "include/effects/SkRuntimeEffect.h"
#include <vector>
using namespace android::uirenderer;
/**
* By default Skia gradients will interpolate their colors in unpremul space
* and then premultiply each of the results. We must set this flag to preserve
* backwards compatiblity by premultiplying the colors of the gradient first,
* and then interpolating between them.
*/
static const uint32_t sGradientShaderFlags = SkGradientShader::kInterpolateColorsInPremul_Flag;
#define ThrowIAE_IfNull(env, ptr) \
if (nullptr == ptr) { \
doThrowIAE(env); \
return 0; \
}
static void Color_RGBToHSV(JNIEnv* env, jobject, jint red, jint green, jint blue, jfloatArray hsvArray)
{
SkScalar hsv[3];
SkRGBToHSV(red, green, blue, hsv);
AutoJavaFloatArray autoHSV(env, hsvArray, 3);
float* values = autoHSV.ptr();
for (int i = 0; i < 3; i++) {
values[i] = SkScalarToFloat(hsv[i]);
}
}
static jint Color_HSVToColor(JNIEnv* env, jobject, jint alpha, jfloatArray hsvArray)
{
AutoJavaFloatArray autoHSV(env, hsvArray, 3);
#ifdef SK_SCALAR_IS_FLOAT
SkScalar* hsv = autoHSV.ptr();
#else
#error Need to convert float array to SkScalar array before calling the following function.
#endif
return static_cast<jint>(SkHSVToColor(alpha, hsv));
}
///////////////////////////////////////////////////////////////////////////////////////////////
static void Shader_safeUnref(SkShader* shader) {
SkSafeUnref(shader);
}
static jlong Shader_getNativeFinalizer(JNIEnv*, jobject) {
return static_cast<jlong>(reinterpret_cast<uintptr_t>(&Shader_safeUnref));
}
///////////////////////////////////////////////////////////////////////////////////////////////
static jlong BitmapShader_constructor(JNIEnv* env, jobject o, jlong matrixPtr, jlong bitmapHandle,
jint tileModeX, jint tileModeY, bool filter,
bool isDirectSampled) {
const SkMatrix* matrix = reinterpret_cast<const SkMatrix*>(matrixPtr);
sk_sp<SkImage> image;
if (bitmapHandle) {
// Only pass a valid SkBitmap object to the constructor if the Bitmap exists. Otherwise,
// we'll pass an empty SkBitmap to avoid crashing/excepting for compatibility.
image = android::bitmap::toBitmap(bitmapHandle).makeImage();
}
if (!image.get()) {
SkBitmap bitmap;
image = SkMakeImageFromRasterBitmap(bitmap, kNever_SkCopyPixelsMode);
}
SkSamplingOptions sampling(filter ? SkFilterMode::kLinear : SkFilterMode::kNearest,
SkMipmapMode::kNone);
sk_sp<SkShader> shader;
if (isDirectSampled) {
shader = image->makeRawShader((SkTileMode)tileModeX, (SkTileMode)tileModeY, sampling);
} else {
shader = image->makeShader((SkTileMode)tileModeX, (SkTileMode)tileModeY, sampling);
}
ThrowIAE_IfNull(env, shader.get());
if (matrix) {
shader = shader->makeWithLocalMatrix(*matrix);
}
return reinterpret_cast<jlong>(shader.release());
}
///////////////////////////////////////////////////////////////////////////////////////////////
static std::vector<SkColor4f> convertColorLongs(JNIEnv* env, jlongArray colorArray) {
const size_t count = env->GetArrayLength(colorArray);
const jlong* colorValues = env->GetLongArrayElements(colorArray, nullptr);
std::vector<SkColor4f> colors(count);
for (size_t i = 0; i < count; ++i) {
colors[i] = GraphicsJNI::convertColorLong(colorValues[i]);
}
env->ReleaseLongArrayElements(colorArray, const_cast<jlong*>(colorValues), JNI_ABORT);
return colors;
}
///////////////////////////////////////////////////////////////////////////////////////////////
static jlong LinearGradient_create(JNIEnv* env, jobject, jlong matrixPtr,
jfloat x0, jfloat y0, jfloat x1, jfloat y1, jlongArray colorArray,
jfloatArray posArray, jint tileMode, jlong colorSpaceHandle) {
SkPoint pts[2];
pts[0].set(x0, y0);
pts[1].set(x1, y1);
std::vector<SkColor4f> colors = convertColorLongs(env, colorArray);
AutoJavaFloatArray autoPos(env, posArray, colors.size());
#ifdef SK_SCALAR_IS_FLOAT
SkScalar* pos = autoPos.ptr();
#else
#error Need to convert float array to SkScalar array before calling the following function.
#endif
sk_sp<SkShader> shader(SkGradientShader::MakeLinear(pts, &colors[0],
GraphicsJNI::getNativeColorSpace(colorSpaceHandle), pos, colors.size(),
static_cast<SkTileMode>(tileMode), sGradientShaderFlags, nullptr));
ThrowIAE_IfNull(env, shader);
const SkMatrix* matrix = reinterpret_cast<const SkMatrix*>(matrixPtr);
if (matrix) {
shader = shader->makeWithLocalMatrix(*matrix);
}
return reinterpret_cast<jlong>(shader.release());
}
///////////////////////////////////////////////////////////////////////////////////////////////
static jlong RadialGradient_create(JNIEnv* env,
jobject,
jlong matrixPtr,
jfloat startX,
jfloat startY,
jfloat startRadius,
jfloat endX,
jfloat endY,
jfloat endRadius,
jlongArray colorArray,
jfloatArray posArray,
jint tileMode,
jlong colorSpaceHandle) {
SkPoint start;
start.set(startX, startY);
SkPoint end;
end.set(endX, endY);
std::vector<SkColor4f> colors = convertColorLongs(env, colorArray);
AutoJavaFloatArray autoPos(env, posArray, colors.size());
#ifdef SK_SCALAR_IS_FLOAT
SkScalar* pos = autoPos.ptr();
#else
#error Need to convert float array to SkScalar array before calling the following function.
#endif
auto colorSpace = GraphicsJNI::getNativeColorSpace(colorSpaceHandle);
auto skTileMode = static_cast<SkTileMode>(tileMode);
sk_sp<SkShader> shader = SkGradientShader::MakeTwoPointConical(start, startRadius, end,
endRadius, &colors[0], std::move(colorSpace), pos, colors.size(), skTileMode,
sGradientShaderFlags, nullptr);
ThrowIAE_IfNull(env, shader);
// Explicitly create a new shader with the specified matrix to match existing behavior.
// Passing in the matrix in the instantiation above can throw exceptions for non-invertible
// matrices. However, makeWithLocalMatrix will still allow for the shader to be created
// and skia handles null-shaders internally (i.e. is ignored)
const SkMatrix* matrix = reinterpret_cast<const SkMatrix*>(matrixPtr);
if (matrix) {
shader = shader->makeWithLocalMatrix(*matrix);
}
return reinterpret_cast<jlong>(shader.release());
}
///////////////////////////////////////////////////////////////////////////////
static jlong SweepGradient_create(JNIEnv* env, jobject, jlong matrixPtr, jfloat x, jfloat y,
jlongArray colorArray, jfloatArray jpositions, jlong colorSpaceHandle) {
std::vector<SkColor4f> colors = convertColorLongs(env, colorArray);
AutoJavaFloatArray autoPos(env, jpositions, colors.size());
#ifdef SK_SCALAR_IS_FLOAT
SkScalar* pos = autoPos.ptr();
#else
#error Need to convert float array to SkScalar array before calling the following function.
#endif
sk_sp<SkShader> shader = SkGradientShader::MakeSweep(x, y, &colors[0],
GraphicsJNI::getNativeColorSpace(colorSpaceHandle), pos, colors.size(),
sGradientShaderFlags, nullptr);
ThrowIAE_IfNull(env, shader);
const SkMatrix* matrix = reinterpret_cast<const SkMatrix*>(matrixPtr);
if (matrix) {
shader = shader->makeWithLocalMatrix(*matrix);
}
return reinterpret_cast<jlong>(shader.release());
}
///////////////////////////////////////////////////////////////////////////////////////////////
static jlong ComposeShader_create(JNIEnv* env, jobject o, jlong matrixPtr,
jlong shaderAHandle, jlong shaderBHandle, jint xfermodeHandle) {
const SkMatrix* matrix = reinterpret_cast<const SkMatrix*>(matrixPtr);
SkShader* shaderA = reinterpret_cast<SkShader *>(shaderAHandle);
SkShader* shaderB = reinterpret_cast<SkShader *>(shaderBHandle);
SkBlendMode mode = static_cast<SkBlendMode>(xfermodeHandle);
sk_sp<SkShader> baseShader(SkShaders::Blend(mode,
sk_ref_sp(shaderA), sk_ref_sp(shaderB)));
SkShader* shader;
if (matrix) {
shader = baseShader->makeWithLocalMatrix(*matrix).release();
} else {
shader = baseShader.release();
}
return reinterpret_cast<jlong>(shader);
}
///////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////
static jlong RuntimeShader_createShaderBuilder(JNIEnv* env, jobject, jstring sksl) {
ScopedUtfChars strSksl(env, sksl);
auto result = SkRuntimeEffect::MakeForShader(SkString(strSksl.c_str()),
SkRuntimeEffect::Options{});
if (result.effect.get() == nullptr) {
doThrowIAE(env, result.errorText.c_str());
return 0;
}
return reinterpret_cast<jlong>(new SkRuntimeShaderBuilder(std::move(result.effect)));
}
static void SkRuntimeShaderBuilder_delete(SkRuntimeShaderBuilder* builder) {
delete builder;
}
static jlong RuntimeShader_getNativeFinalizer(JNIEnv*, jobject) {
return static_cast<jlong>(reinterpret_cast<uintptr_t>(&SkRuntimeShaderBuilder_delete));
}
static jlong RuntimeShader_create(JNIEnv* env, jobject, jlong shaderBuilder, jlong matrixPtr) {
SkRuntimeShaderBuilder* builder = reinterpret_cast<SkRuntimeShaderBuilder*>(shaderBuilder);
const SkMatrix* matrix = reinterpret_cast<const SkMatrix*>(matrixPtr);
sk_sp<SkShader> shader = builder->makeShader(matrix);
ThrowIAE_IfNull(env, shader);
return reinterpret_cast<jlong>(shader.release());
}
static inline int ThrowIAEFmt(JNIEnv* env, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
int ret = jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", fmt, args);
va_end(args);
return ret;
}
static bool isIntUniformType(const SkRuntimeEffect::Uniform::Type& type) {
switch (type) {
case SkRuntimeEffect::Uniform::Type::kFloat:
case SkRuntimeEffect::Uniform::Type::kFloat2:
case SkRuntimeEffect::Uniform::Type::kFloat3:
case SkRuntimeEffect::Uniform::Type::kFloat4:
case SkRuntimeEffect::Uniform::Type::kFloat2x2:
case SkRuntimeEffect::Uniform::Type::kFloat3x3:
case SkRuntimeEffect::Uniform::Type::kFloat4x4:
return false;
case SkRuntimeEffect::Uniform::Type::kInt:
case SkRuntimeEffect::Uniform::Type::kInt2:
case SkRuntimeEffect::Uniform::Type::kInt3:
case SkRuntimeEffect::Uniform::Type::kInt4:
return true;
}
}
static void UpdateFloatUniforms(JNIEnv* env, SkRuntimeShaderBuilder* builder,
const char* uniformName, const float values[], int count,
bool isColor) {
SkRuntimeShaderBuilder::BuilderUniform uniform = builder->uniform(uniformName);
if (uniform.fVar == nullptr) {
ThrowIAEFmt(env, "unable to find uniform named %s", uniformName);
} else if (isColor != ((uniform.fVar->flags & SkRuntimeEffect::Uniform::kColor_Flag) != 0)) {
if (isColor) {
jniThrowExceptionFmt(
env, "java/lang/IllegalArgumentException",
"attempting to set a color uniform using the non-color specific APIs: %s %x",
uniformName, uniform.fVar->flags);
} else {
ThrowIAEFmt(env,
"attempting to set a non-color uniform using the setColorUniform APIs: %s",
uniformName);
}
} else if (isIntUniformType(uniform.fVar->type)) {
ThrowIAEFmt(env, "attempting to set a int uniform using the setUniform APIs: %s",
uniformName);
} else if (!uniform.set<float>(values, count)) {
ThrowIAEFmt(env, "mismatch in byte size for uniform [expected: %zu actual: %zu]",
uniform.fVar->sizeInBytes(), sizeof(float) * count);
}
}
static void RuntimeShader_updateFloatUniforms(JNIEnv* env, jobject, jlong shaderBuilder,
jstring jUniformName, jfloat value1, jfloat value2,
jfloat value3, jfloat value4, jint count) {
SkRuntimeShaderBuilder* builder = reinterpret_cast<SkRuntimeShaderBuilder*>(shaderBuilder);
ScopedUtfChars name(env, jUniformName);
const float values[4] = {value1, value2, value3, value4};
UpdateFloatUniforms(env, builder, name.c_str(), values, count, false);
}
static void RuntimeShader_updateFloatArrayUniforms(JNIEnv* env, jobject, jlong shaderBuilder,
jstring jUniformName, jfloatArray jvalues,
jboolean isColor) {
SkRuntimeShaderBuilder* builder = reinterpret_cast<SkRuntimeShaderBuilder*>(shaderBuilder);
ScopedUtfChars name(env, jUniformName);
AutoJavaFloatArray autoValues(env, jvalues, 0, kRO_JNIAccess);
UpdateFloatUniforms(env, builder, name.c_str(), autoValues.ptr(), autoValues.length(), isColor);
}
static void UpdateIntUniforms(JNIEnv* env, SkRuntimeShaderBuilder* builder, const char* uniformName,
const int values[], int count) {
SkRuntimeShaderBuilder::BuilderUniform uniform = builder->uniform(uniformName);
if (uniform.fVar == nullptr) {
ThrowIAEFmt(env, "unable to find uniform named %s", uniformName);
} else if (!isIntUniformType(uniform.fVar->type)) {
ThrowIAEFmt(env, "attempting to set a non-int uniform using the setIntUniform APIs: %s",
uniformName);
} else if (!uniform.set<int>(values, count)) {
ThrowIAEFmt(env, "mismatch in byte size for uniform [expected: %zu actual: %zu]",
uniform.fVar->sizeInBytes(), sizeof(float) * count);
}
}
static void RuntimeShader_updateIntUniforms(JNIEnv* env, jobject, jlong shaderBuilder,
jstring jUniformName, jint value1, jint value2,
jint value3, jint value4, jint count) {
SkRuntimeShaderBuilder* builder = reinterpret_cast<SkRuntimeShaderBuilder*>(shaderBuilder);
ScopedUtfChars name(env, jUniformName);
const int values[4] = {value1, value2, value3, value4};
UpdateIntUniforms(env, builder, name.c_str(), values, count);
}
static void RuntimeShader_updateIntArrayUniforms(JNIEnv* env, jobject, jlong shaderBuilder,
jstring jUniformName, jintArray jvalues) {
SkRuntimeShaderBuilder* builder = reinterpret_cast<SkRuntimeShaderBuilder*>(shaderBuilder);
ScopedUtfChars name(env, jUniformName);
AutoJavaIntArray autoValues(env, jvalues, 0);
UpdateIntUniforms(env, builder, name.c_str(), autoValues.ptr(), autoValues.length());
}
static void RuntimeShader_updateShader(JNIEnv* env, jobject, jlong shaderBuilder,
jstring jUniformName, jlong shaderHandle) {
SkRuntimeShaderBuilder* builder = reinterpret_cast<SkRuntimeShaderBuilder*>(shaderBuilder);
ScopedUtfChars name(env, jUniformName);
SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle);
SkRuntimeShaderBuilder::BuilderChild child = builder->child(name.c_str());
if (child.fChild == nullptr) {
ThrowIAEFmt(env, "unable to find shader named %s", name.c_str());
return;
}
builder->child(name.c_str()) = sk_ref_sp(shader);
}
///////////////////////////////////////////////////////////////////////////////////////////////
static const JNINativeMethod gColorMethods[] = {
{ "nativeRGBToHSV", "(III[F)V", (void*)Color_RGBToHSV },
{ "nativeHSVToColor", "(I[F)I", (void*)Color_HSVToColor }
};
static const JNINativeMethod gShaderMethods[] = {
{ "nativeGetFinalizer", "()J", (void*)Shader_getNativeFinalizer },
};
static const JNINativeMethod gBitmapShaderMethods[] = {
{"nativeCreate", "(JJIIZZ)J", (void*)BitmapShader_constructor},
};
static const JNINativeMethod gLinearGradientMethods[] = {
{ "nativeCreate", "(JFFFF[J[FIJ)J", (void*)LinearGradient_create },
};
static const JNINativeMethod gRadialGradientMethods[] = {
{ "nativeCreate", "(JFFFFFF[J[FIJ)J", (void*)RadialGradient_create },
};
static const JNINativeMethod gSweepGradientMethods[] = {
{ "nativeCreate", "(JFF[J[FJ)J", (void*)SweepGradient_create },
};
static const JNINativeMethod gComposeShaderMethods[] = {
{ "nativeCreate", "(JJJI)J", (void*)ComposeShader_create },
};
static const JNINativeMethod gRuntimeShaderMethods[] = {
{"nativeGetFinalizer", "()J", (void*)RuntimeShader_getNativeFinalizer},
{"nativeCreateShader", "(JJ)J", (void*)RuntimeShader_create},
{"nativeCreateBuilder", "(Ljava/lang/String;)J", (void*)RuntimeShader_createShaderBuilder},
{"nativeUpdateUniforms", "(JLjava/lang/String;[FZ)V",
(void*)RuntimeShader_updateFloatArrayUniforms},
{"nativeUpdateUniforms", "(JLjava/lang/String;FFFFI)V",
(void*)RuntimeShader_updateFloatUniforms},
{"nativeUpdateUniforms", "(JLjava/lang/String;[I)V",
(void*)RuntimeShader_updateIntArrayUniforms},
{"nativeUpdateUniforms", "(JLjava/lang/String;IIIII)V",
(void*)RuntimeShader_updateIntUniforms},
{"nativeUpdateShader", "(JLjava/lang/String;J)V", (void*)RuntimeShader_updateShader},
};
int register_android_graphics_Shader(JNIEnv* env)
{
android::RegisterMethodsOrDie(env, "android/graphics/Color", gColorMethods,
NELEM(gColorMethods));
android::RegisterMethodsOrDie(env, "android/graphics/Shader", gShaderMethods,
NELEM(gShaderMethods));
android::RegisterMethodsOrDie(env, "android/graphics/BitmapShader", gBitmapShaderMethods,
NELEM(gBitmapShaderMethods));
android::RegisterMethodsOrDie(env, "android/graphics/LinearGradient", gLinearGradientMethods,
NELEM(gLinearGradientMethods));
android::RegisterMethodsOrDie(env, "android/graphics/RadialGradient", gRadialGradientMethods,
NELEM(gRadialGradientMethods));
android::RegisterMethodsOrDie(env, "android/graphics/SweepGradient", gSweepGradientMethods,
NELEM(gSweepGradientMethods));
android::RegisterMethodsOrDie(env, "android/graphics/ComposeShader", gComposeShaderMethods,
NELEM(gComposeShaderMethods));
android::RegisterMethodsOrDie(env, "android/graphics/RuntimeShader", gRuntimeShaderMethods,
NELEM(gRuntimeShaderMethods));
return 0;
}
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