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#include "GraphicsJNI.h"
#include "SkGradientShader.h"
#include "SkShader.h"
#include "SkXfermode.h"
#include "core_jni_helpers.h"
#include <Caches.h>
#include <jni.h>
using namespace android::uirenderer;
static void ThrowIAE_IfNull(JNIEnv* env, void* ptr) {
if (NULL == ptr) {
doThrowIAE(env);
}
}
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_destructor(JNIEnv* env, jobject o, jlong shaderHandle, jlong shaderWithLMHandle)
{
SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle);
SkSafeUnref(shader);
}
static jlong Shader_setLocalMatrix(JNIEnv* env, jobject o, jlong shaderHandle, jlong matrixHandle)
{
// ensure we have a valid matrix to use
const SkMatrix* matrix = reinterpret_cast<SkMatrix*>(matrixHandle);
if (NULL == matrix) {
matrix = &SkMatrix::I();
}
// The current shader will no longer need a direct reference owned by Shader.java
// as all the data needed is contained within the newly created LocalMatrixShader.
SkASSERT(shaderHandle);
SkAutoTUnref<SkShader> currentShader(reinterpret_cast<SkShader*>(shaderHandle));
// Attempt to peel off an existing proxy shader and get the proxy's matrix. If
// the proxy existed and it's matrix equals the desired matrix then just return
// the proxy, otherwise replace it with a new proxy containing the desired matrix.
//
// refAsALocalMatrixShader(): if the shader contains a proxy then it unwraps the proxy
// returning both the underlying shader and the proxy's matrix.
// newWithLocalMatrix(): will return a proxy shader that wraps the provided shader and
// concats the provided local matrix with the shader's matrix.
//
// WARNING: This proxy replacement only behaves like a setter because the Java
// API enforces that all local matrices are set using this call and
// not passed to the constructor of the Shader.
SkMatrix proxyMatrix;
SkAutoTUnref<SkShader> baseShader(currentShader->refAsALocalMatrixShader(&proxyMatrix));
if (baseShader.get()) {
if (proxyMatrix == *matrix) {
return reinterpret_cast<jlong>(currentShader.detach());
}
return reinterpret_cast<jlong>(baseShader->newWithLocalMatrix(*matrix));
}
return reinterpret_cast<jlong>(currentShader->newWithLocalMatrix(*matrix));
}
///////////////////////////////////////////////////////////////////////////////////////////////
static jlong BitmapShader_constructor(JNIEnv* env, jobject o, jobject jbitmap,
jint tileModeX, jint tileModeY)
{
SkBitmap bitmap;
if (jbitmap) {
// 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.
GraphicsJNI::getSkBitmap(env, jbitmap, &bitmap);
}
SkShader* s = SkShader::CreateBitmapShader(bitmap,
(SkShader::TileMode)tileModeX,
(SkShader::TileMode)tileModeY);
ThrowIAE_IfNull(env, s);
return reinterpret_cast<jlong>(s);
}
///////////////////////////////////////////////////////////////////////////////////////////////
static jlong LinearGradient_create1(JNIEnv* env, jobject o,
jfloat x0, jfloat y0, jfloat x1, jfloat y1,
jintArray colorArray, jfloatArray posArray, jint tileMode)
{
SkPoint pts[2];
pts[0].set(x0, y0);
pts[1].set(x1, y1);
size_t count = env->GetArrayLength(colorArray);
const jint* colorValues = env->GetIntArrayElements(colorArray, NULL);
AutoJavaFloatArray autoPos(env, posArray, count);
#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
SkShader* shader = SkGradientShader::CreateLinear(pts,
reinterpret_cast<const SkColor*>(colorValues), pos, count,
static_cast<SkShader::TileMode>(tileMode));
env->ReleaseIntArrayElements(colorArray, const_cast<jint*>(colorValues), JNI_ABORT);
ThrowIAE_IfNull(env, shader);
return reinterpret_cast<jlong>(shader);
}
static jlong LinearGradient_create2(JNIEnv* env, jobject o,
jfloat x0, jfloat y0, jfloat x1, jfloat y1,
jint color0, jint color1, jint tileMode)
{
SkPoint pts[2];
pts[0].set(x0, y0);
pts[1].set(x1, y1);
SkColor colors[2];
colors[0] = color0;
colors[1] = color1;
SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2, (SkShader::TileMode)tileMode);
ThrowIAE_IfNull(env, s);
return reinterpret_cast<jlong>(s);
}
///////////////////////////////////////////////////////////////////////////////////////////////
static jlong RadialGradient_create1(JNIEnv* env, jobject, jfloat x, jfloat y, jfloat radius,
jintArray colorArray, jfloatArray posArray, jint tileMode) {
SkPoint center;
center.set(x, y);
size_t count = env->GetArrayLength(colorArray);
const jint* colorValues = env->GetIntArrayElements(colorArray, NULL);
AutoJavaFloatArray autoPos(env, posArray, count);
#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
SkShader* shader = SkGradientShader::CreateRadial(center, radius,
reinterpret_cast<const SkColor*>(colorValues), pos, count,
static_cast<SkShader::TileMode>(tileMode));
env->ReleaseIntArrayElements(colorArray, const_cast<jint*>(colorValues),
JNI_ABORT);
ThrowIAE_IfNull(env, shader);
return reinterpret_cast<jlong>(shader);
}
static jlong RadialGradient_create2(JNIEnv* env, jobject, jfloat x, jfloat y, jfloat radius,
jint color0, jint color1, jint tileMode) {
SkPoint center;
center.set(x, y);
SkColor colors[2];
colors[0] = color0;
colors[1] = color1;
SkShader* s = SkGradientShader::CreateRadial(center, radius, colors, NULL, 2,
(SkShader::TileMode)tileMode);
ThrowIAE_IfNull(env, s);
return reinterpret_cast<jlong>(s);
}
///////////////////////////////////////////////////////////////////////////////
static jlong SweepGradient_create1(JNIEnv* env, jobject, jfloat x, jfloat y,
jintArray jcolors, jfloatArray jpositions) {
size_t count = env->GetArrayLength(jcolors);
const jint* colors = env->GetIntArrayElements(jcolors, NULL);
AutoJavaFloatArray autoPos(env, jpositions, count);
#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
SkShader* shader = SkGradientShader::CreateSweep(x, y,
reinterpret_cast<const SkColor*>(colors), pos, count);
env->ReleaseIntArrayElements(jcolors, const_cast<jint*>(colors),
JNI_ABORT);
ThrowIAE_IfNull(env, shader);
return reinterpret_cast<jlong>(shader);
}
static jlong SweepGradient_create2(JNIEnv* env, jobject, jfloat x, jfloat y,
int color0, int color1) {
SkColor colors[2];
colors[0] = color0;
colors[1] = color1;
SkShader* s = SkGradientShader::CreateSweep(x, y, colors, NULL, 2);
ThrowIAE_IfNull(env, s);
return reinterpret_cast<jlong>(s);
}
///////////////////////////////////////////////////////////////////////////////////////////////
static jlong ComposeShader_create1(JNIEnv* env, jobject o,
jlong shaderAHandle, jlong shaderBHandle, jlong modeHandle)
{
SkShader* shaderA = reinterpret_cast<SkShader *>(shaderAHandle);
SkShader* shaderB = reinterpret_cast<SkShader *>(shaderBHandle);
SkXfermode* mode = reinterpret_cast<SkXfermode *>(modeHandle);
SkShader* shader = SkShader::CreateComposeShader(shaderA, shaderB, mode);
return reinterpret_cast<jlong>(shader);
}
static jlong ComposeShader_create2(JNIEnv* env, jobject o,
jlong shaderAHandle, jlong shaderBHandle, jint xfermodeHandle)
{
SkShader* shaderA = reinterpret_cast<SkShader *>(shaderAHandle);
SkShader* shaderB = reinterpret_cast<SkShader *>(shaderBHandle);
SkXfermode::Mode mode = static_cast<SkXfermode::Mode>(xfermodeHandle);
SkAutoTUnref<SkXfermode> xfermode(SkXfermode::Create(mode));
SkShader* shader = SkShader::CreateComposeShader(shaderA, shaderB, xfermode.get());
return reinterpret_cast<jlong>(shader);
}
///////////////////////////////////////////////////////////////////////////////////////////////
static const JNINativeMethod gColorMethods[] = {
{ "nativeRGBToHSV", "(III[F)V", (void*)Color_RGBToHSV },
{ "nativeHSVToColor", "(I[F)I", (void*)Color_HSVToColor }
};
static const JNINativeMethod gShaderMethods[] = {
{ "nativeDestructor", "(J)V", (void*)Shader_destructor },
{ "nativeSetLocalMatrix", "(JJ)J", (void*)Shader_setLocalMatrix }
};
static const JNINativeMethod gBitmapShaderMethods[] = {
{ "nativeCreate", "(Landroid/graphics/Bitmap;II)J", (void*)BitmapShader_constructor },
};
static const JNINativeMethod gLinearGradientMethods[] = {
{ "nativeCreate1", "(FFFF[I[FI)J", (void*)LinearGradient_create1 },
{ "nativeCreate2", "(FFFFIII)J", (void*)LinearGradient_create2 },
};
static const JNINativeMethod gRadialGradientMethods[] = {
{ "nativeCreate1", "(FFF[I[FI)J", (void*)RadialGradient_create1 },
{ "nativeCreate2", "(FFFIII)J", (void*)RadialGradient_create2 },
};
static const JNINativeMethod gSweepGradientMethods[] = {
{ "nativeCreate1", "(FF[I[F)J", (void*)SweepGradient_create1 },
{ "nativeCreate2", "(FFII)J", (void*)SweepGradient_create2 },
};
static const JNINativeMethod gComposeShaderMethods[] = {
{ "nativeCreate1", "(JJJ)J", (void*)ComposeShader_create1 },
{ "nativeCreate2", "(JJI)J", (void*)ComposeShader_create2 },
};
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));
return 0;
}
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