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/*
**
** Copyright 2006, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#define LOG_TAG "9patch"
#define LOG_NDEBUG 1
#include <androidfw/ResourceTypes.h>
#include <utils/Log.h>
#include "SkCanvas.h"
#include "SkRegion.h"
#include "GraphicsJNI.h"
#include "JNIHelp.h"
extern void NinePatch_Draw(SkCanvas* canvas, const SkRect& bounds,
const SkBitmap& bitmap, const android::Res_png_9patch& chunk,
const SkPaint* paint, SkRegion** outRegion);
using namespace android;
class SkNinePatchGlue {
public:
static jboolean isNinePatchChunk(JNIEnv* env, jobject, jbyteArray obj)
{
if (NULL == obj) {
return false;
}
if (env->GetArrayLength(obj) < (int)sizeof(Res_png_9patch)) {
return false;
}
const jbyte* array = env->GetByteArrayElements(obj, 0);
if (array != NULL) {
const Res_png_9patch* chunk =
reinterpret_cast<const Res_png_9patch*>(array);
int8_t wasDeserialized = chunk->wasDeserialized;
env->ReleaseByteArrayElements(obj, const_cast<jbyte*>(array),
JNI_ABORT);
return wasDeserialized != -1;
}
return false;
}
static void validateNinePatchChunk(JNIEnv* env, jobject, jint, jbyteArray obj)
{
if (env->GetArrayLength(obj) < (int) (sizeof(Res_png_9patch))) {
jniThrowRuntimeException(env, "Array too small for chunk.");
return;
}
// XXX Also check that dimensions are correct.
}
static void draw(JNIEnv* env, SkCanvas* canvas, SkRect& bounds,
const SkBitmap* bitmap, jbyteArray chunkObj, const SkPaint* paint,
jint destDensity, jint srcDensity)
{
size_t chunkSize = env->GetArrayLength(chunkObj);
void* storage = alloca(chunkSize);
env->GetByteArrayRegion(chunkObj, 0, chunkSize,
reinterpret_cast<jbyte*>(storage));
if (!env->ExceptionCheck()) {
// need to deserialize the chunk
Res_png_9patch* chunk = static_cast<Res_png_9patch*>(storage);
assert(chunkSize == chunk->serializedSize());
// this relies on deserialization being done in place
Res_png_9patch::deserialize(chunk);
if (destDensity == srcDensity || destDensity == 0
|| srcDensity == 0) {
ALOGV("Drawing unscaled 9-patch: (%g,%g)-(%g,%g)",
SkScalarToFloat(bounds.fLeft), SkScalarToFloat(bounds.fTop),
SkScalarToFloat(bounds.fRight), SkScalarToFloat(bounds.fBottom));
NinePatch_Draw(canvas, bounds, *bitmap, *chunk, paint, NULL);
} else {
canvas->save();
SkScalar scale = SkFloatToScalar(destDensity / (float)srcDensity);
canvas->translate(bounds.fLeft, bounds.fTop);
canvas->scale(scale, scale);
bounds.fRight = SkScalarDiv(bounds.fRight-bounds.fLeft, scale);
bounds.fBottom = SkScalarDiv(bounds.fBottom-bounds.fTop, scale);
bounds.fLeft = bounds.fTop = 0;
ALOGV("Drawing scaled 9-patch: (%g,%g)-(%g,%g) srcDensity=%d destDensity=%d",
SkScalarToFloat(bounds.fLeft), SkScalarToFloat(bounds.fTop),
SkScalarToFloat(bounds.fRight), SkScalarToFloat(bounds.fBottom),
srcDensity, destDensity);
NinePatch_Draw(canvas, bounds, *bitmap, *chunk, paint, NULL);
canvas->restore();
}
}
}
static void drawF(JNIEnv* env, jobject, SkCanvas* canvas, jobject boundsRectF,
const SkBitmap* bitmap, jbyteArray chunkObj, const SkPaint* paint,
jint destDensity, jint srcDensity)
{
SkASSERT(canvas);
SkASSERT(boundsRectF);
SkASSERT(bitmap);
SkASSERT(chunkObj);
// paint is optional
SkRect bounds;
GraphicsJNI::jrectf_to_rect(env, boundsRectF, &bounds);
draw(env, canvas, bounds, bitmap, chunkObj, paint, destDensity, srcDensity);
}
static void drawI(JNIEnv* env, jobject, SkCanvas* canvas, jobject boundsRect,
const SkBitmap* bitmap, jbyteArray chunkObj, const SkPaint* paint,
jint destDensity, jint srcDensity)
{
SkASSERT(canvas);
SkASSERT(boundsRect);
SkASSERT(bitmap);
SkASSERT(chunkObj);
// paint is optional
SkRect bounds;
GraphicsJNI::jrect_to_rect(env, boundsRect, &bounds);
draw(env, canvas, bounds, bitmap, chunkObj, paint, destDensity, srcDensity);
}
static jint getTransparentRegion(JNIEnv* env, jobject,
const SkBitmap* bitmap, jbyteArray chunkObj,
jobject boundsRect)
{
SkASSERT(bitmap);
SkASSERT(chunkObj);
SkASSERT(boundsRect);
SkRect bounds;
GraphicsJNI::jrect_to_rect(env, boundsRect, &bounds);
size_t chunkSize = env->GetArrayLength(chunkObj);
void* storage = alloca(chunkSize);
env->GetByteArrayRegion(chunkObj, 0, chunkSize,
reinterpret_cast<jbyte*>(storage));
if (!env->ExceptionCheck()) {
// need to deserialize the chunk
Res_png_9patch* chunk = static_cast<Res_png_9patch*>(storage);
assert(chunkSize == chunk->serializedSize());
// this relies on deserialization being done in place
Res_png_9patch::deserialize(chunk);
SkRegion* region = NULL;
NinePatch_Draw(NULL, bounds, *bitmap, *chunk, NULL, ®ion);
return (jint)region;
}
return 0;
}
};
/////////////////////////////////////////////////////////////////////////////////////////
#include <android_runtime/AndroidRuntime.h>
static JNINativeMethod gNinePatchMethods[] = {
{ "isNinePatchChunk", "([B)Z", (void*)SkNinePatchGlue::isNinePatchChunk },
{ "validateNinePatchChunk", "(I[B)V", (void*)SkNinePatchGlue::validateNinePatchChunk },
{ "nativeDraw", "(ILandroid/graphics/RectF;I[BIII)V", (void*)SkNinePatchGlue::drawF },
{ "nativeDraw", "(ILandroid/graphics/Rect;I[BIII)V", (void*)SkNinePatchGlue::drawI },
{ "nativeGetTransparentRegion", "(I[BLandroid/graphics/Rect;)I",
(void*)SkNinePatchGlue::getTransparentRegion }
};
int register_android_graphics_NinePatch(JNIEnv* env)
{
return android::AndroidRuntime::registerNativeMethods(env,
"android/graphics/NinePatch",
gNinePatchMethods,
SK_ARRAY_COUNT(gNinePatchMethods));
}
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