/* ** ** 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 <ResourceCache.h> #include "Paint.h" #include "Canvas.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; /** * IMPORTANT NOTE: 9patch chunks can be manipuated either as an array of bytes * or as a Res_png_9patch instance. It is important to note that the size of the * array required to hold a 9patch chunk is greater than sizeof(Res_png_9patch). * The code below manipulates chunks as Res_png_9patch* types to draw and as * int8_t* to allocate and free the backing storage. */ class SkNinePatchGlue { public: static jboolean isNinePatchChunk(JNIEnv* env, jobject, jbyteArray obj) { if (NULL == obj) { return JNI_FALSE; } if (env->GetArrayLength(obj) < (int)sizeof(Res_png_9patch)) { return JNI_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) ? JNI_TRUE : JNI_FALSE; } return JNI_FALSE; } static jlong validateNinePatchChunk(JNIEnv* env, jobject, jlong, jbyteArray obj) { size_t chunkSize = env->GetArrayLength(obj); if (chunkSize < (int) (sizeof(Res_png_9patch))) { jniThrowRuntimeException(env, "Array too small for chunk."); return NULL; } int8_t* storage = new int8_t[chunkSize]; // This call copies the content of the jbyteArray env->GetByteArrayRegion(obj, 0, chunkSize, reinterpret_cast<jbyte*>(storage)); // Deserialize in place, return the array we just allocated return reinterpret_cast<jlong>(Res_png_9patch::deserialize(storage)); } static void finalize(JNIEnv* env, jobject, jlong patchHandle) { int8_t* patch = reinterpret_cast<int8_t*>(patchHandle); #ifdef USE_OPENGL_RENDERER if (android::uirenderer::ResourceCache::hasInstance()) { Res_png_9patch* p = (Res_png_9patch*) patch; android::uirenderer::ResourceCache::getInstance().destructor(p); return; } #endif // USE_OPENGL_RENDERER delete[] patch; } static void draw(JNIEnv* env, SkCanvas* canvas, SkRect& bounds, const SkBitmap* bitmap, Res_png_9patch* chunk, const SkPaint* paint, jint destDensity, jint srcDensity) { 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 = 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, jlong canvasHandle, jobject boundsRectF, jlong bitmapHandle, jlong chunkHandle, jlong paintHandle, jint destDensity, jint srcDensity) { SkCanvas* canvas = reinterpret_cast<Canvas*>(canvasHandle)->getSkCanvas(); const SkBitmap* bitmap = reinterpret_cast<SkBitmap*>(bitmapHandle); Res_png_9patch* chunk = reinterpret_cast<Res_png_9patch*>(chunkHandle); const Paint* paint = reinterpret_cast<Paint*>(paintHandle); SkASSERT(canvas); SkASSERT(boundsRectF); SkASSERT(bitmap); SkASSERT(chunk); // paint is optional SkRect bounds; GraphicsJNI::jrectf_to_rect(env, boundsRectF, &bounds); draw(env, canvas, bounds, bitmap, chunk, paint, destDensity, srcDensity); } static void drawI(JNIEnv* env, jobject, jlong canvasHandle, jobject boundsRect, jlong bitmapHandle, jlong chunkHandle, jlong paintHandle, jint destDensity, jint srcDensity) { SkCanvas* canvas = reinterpret_cast<Canvas*>(canvasHandle)->getSkCanvas(); const SkBitmap* bitmap = reinterpret_cast<SkBitmap*>(bitmapHandle); Res_png_9patch* chunk = reinterpret_cast<Res_png_9patch*>(chunkHandle); const Paint* paint = reinterpret_cast<Paint*>(paintHandle); SkASSERT(canvas); SkASSERT(boundsRect); SkASSERT(bitmap); SkASSERT(chunk); // paint is optional SkRect bounds; GraphicsJNI::jrect_to_rect(env, boundsRect, &bounds); draw(env, canvas, bounds, bitmap, chunk, paint, destDensity, srcDensity); } static jlong getTransparentRegion(JNIEnv* env, jobject, jlong bitmapHandle, jlong chunkHandle, jobject boundsRect) { const SkBitmap* bitmap = reinterpret_cast<SkBitmap*>(bitmapHandle); Res_png_9patch* chunk = reinterpret_cast<Res_png_9patch*>(chunkHandle); SkASSERT(bitmap); SkASSERT(chunk); SkASSERT(boundsRect); SkRect bounds; GraphicsJNI::jrect_to_rect(env, boundsRect, &bounds); SkRegion* region = NULL; NinePatch_Draw(NULL, bounds, *bitmap, *chunk, NULL, ®ion); return reinterpret_cast<jlong>(region); } }; ///////////////////////////////////////////////////////////////////////////////////////// #include <android_runtime/AndroidRuntime.h> static JNINativeMethod gNinePatchMethods[] = { { "isNinePatchChunk", "([B)Z", (void*) SkNinePatchGlue::isNinePatchChunk }, { "validateNinePatchChunk", "(J[B)J", (void*) SkNinePatchGlue::validateNinePatchChunk }, { "nativeFinalize", "(J)V", (void*) SkNinePatchGlue::finalize }, { "nativeDraw", "(JLandroid/graphics/RectF;JJJII)V", (void*) SkNinePatchGlue::drawF }, { "nativeDraw", "(JLandroid/graphics/Rect;JJJII)V", (void*) SkNinePatchGlue::drawI }, { "nativeGetTransparentRegion", "(JJLandroid/graphics/Rect;)J", (void*) SkNinePatchGlue::getTransparentRegion } }; int register_android_graphics_NinePatch(JNIEnv* env) { return android::AndroidRuntime::registerNativeMethods(env, "android/graphics/NinePatch", gNinePatchMethods, SK_ARRAY_COUNT(gNinePatchMethods)); }