在jni中使用SKMovie加载gif图片过程

#include <string.h>
#include <android/log.h>
#include <android/bitmap.h>
#include <jni.h>

#include "SkCanvas.h"
#include "SkMovie.h"
#include "SkRect.h"
#include "SkTime.h"
#include "SkPaint.h"
#include "GraphicsJNI.h"

#define  LOG_TAG    "libglgif"
#define  LOGI(...)  __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__)
#define  LOGE(...)  __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)

 

extern "C" {
JNIEXPORT jlong JNICALL Java_com_zte_liaoxy_myGLRenderer_nativeCreateGif(JNIEnv* env, jobject thiz, jstring path);
JNIEXPORT void JNICALL Java_com_zte_liaoxy_myGLRenderer_nativeDrawGif(JNIEnv* env, jobject thiz, jobject canvas, jobject paint, jlong gifid, jint left, jint top);
JNIEXPORT void JNICALL Java_com_zte_liaoxy_myGLRenderer_nativeCopyToBitmap(JNIEnv* env, jobject thiz, jobject bitmap, jlong gifid, jint left, jint top);
JNIEXPORT void JNICALL Java_com_zte_liaoxy_myGLRenderer_nativeDeleteGif(JNIEnv* env, jobject thiz, jlong gif);
JNIEXPORT jint JNICALL Java_com_zte_liaoxy_myGLRenderer_getNativeGifWidth(JNIEnv* env, jobject thiz, jlong gif);
JNIEXPORT jint JNICALL Java_com_zte_liaoxy_myGLRenderer_getNativeGifHeigth(JNIEnv* env, jobject thiz, jlong gif);

 

}

JNIEXPORT jlong JNICALL Java_com_zte_liaoxy_myGLRenderer_nativeCreateGif(JNIEnv* env, jobject thiz, jstring path) {
 jlong result = 0;
 LOGE("create gif");
 if (NULL != path) {
  const char * const pathstr = env->GetStringUTFChars(path, NULL) ;
  LOGE("create gif %s", pathstr);
  const SkMovie* movie = SkMovie::DecodeFile(pathstr);
  if (NULL != movie) {
   result = reinterpret_cast<jlong>(movie);
   LOGE("create gif %s done with %p (%lld)", pathstr, movie, result);
  }
  env->ReleaseStringUTFChars(path, pathstr);
 }
 return result;
}

JNIEXPORT void JNICALL Java_com_zte_liaoxy_myGLRenderer_nativeDeleteGif(JNIEnv* env, jobject thiz, jlong gifid) {
 SkMovie* ptr = reinterpret_cast<SkMovie*>(gifid);
 LOGE("delete gif %p (%lld)", ptr, gifid);
 if (NULL != ptr) {
  delete ptr;
 }
}
JNIEXPORT jint JNICALL Java_com_zte_liaoxy_myGLRenderer_getNativeGifWidth(JNIEnv* env, jobject thiz, jlong gif){
 SkMovie* ptr = reinterpret_cast<SkMovie*>(gif);
 LOGE("getWidth gif %p (%lld)", ptr, gif);
 int width = ptr->width();
 LOGE("getWidth gif width %d", width);
 return width;
 
}

JNIEXPORT jint JNICALL Java_com_zte_liaoxy_myGLRenderer_getNativeGifHeigth(JNIEnv* env, jobject thiz, jlong gif){
 SkMovie* ptr = reinterpret_cast<SkMovie*>(gif);
 LOGE("getHeigth gif %p (%lld)", ptr, gif);
 int heigth = ptr->height();
 LOGE("getHeigth gif heigth %d", heigth);
 return heigth;
 
}

 

JNIEXPORT void JNICALL Java_com_zte_liaoxy_myGLRenderer_nativeCopyToBitmap(JNIEnv* env, jobject thiz, jobject bitmap, jlong gifid, jint left, jint top) {
 SkMovie* movie = reinterpret_cast<SkMovie*>(gifid);
 LOGE("draw gif %p (%lld)", movie, gifid);
    if (NULL != bitmap && NULL != movie) {
  SkMSec duration = movie->duration();
  SkMSec time = 0;
  if (duration) {
   time = SkTime::GetMSecs() % duration;
   movie->setTime(time);
  } else {
   movie->setTime(0);
  }

  AndroidBitmapInfo  bitmapInfo; 
  void*    bitmapPixels;
  int ret = AndroidBitmap_getInfo(env, bitmap, &bitmapInfo);
  if (0 > ret) {
   LOGE("get bitmap %p info failed: %d", &bitmap, ret);
  }
  ret = AndroidBitmap_lockPixels(env, bitmap, &bitmapPixels);
  if (0 > ret) {
   LOGE("lock bitmap %p failed: %d", &bitmap, ret);
  }

  SkBitmap::Config config = SkBitmap::kNo_Config;
  switch(bitmapInfo.format) {
  case ANDROID_BITMAP_FORMAT_RGBA_8888:
   config = SkBitmap::kARGB_8888_Config;
   break;
  case ANDROID_BITMAP_FORMAT_RGB_565:
   config = SkBitmap::kRGB_565_Config;
   break;
  case ANDROID_BITMAP_FORMAT_RGBA_4444:
   config = SkBitmap::kARGB_4444_Config;
   break;
  case ANDROID_BITMAP_FORMAT_A_8:
   config = SkBitmap::kA8_Config;
   break;
  }

  if (SkBitmap::kNo_Config == config || SkBitmap::kConfigCount <= config) {
   LOGE("unsupported bitmap format %d", bitmapInfo.format);
   return;
  }

  SkBitmap skBitmap;
  skBitmap.setConfig(config, bitmapInfo.width, bitmapInfo.height, 0);
  skBitmap.setPixels(bitmapPixels);

  SkCanvas skCanvas(skBitmap);
  LOGE("  begin drawing  %d/%d on native canvas %p", time, duration, &skCanvas);
  const SkBitmap& movieBitmap = movie->bitmap();
  LOGE("nativeCopyToBitmap===========drawing bitmap %p to the native canvas at (%d, %d)", &movieBitmap, left, top);
  skCanvas.drawBitmap(movieBitmap, SkIntToScalar(left), SkIntToScalar(top));
 }
}

JNIEXPORT void JNICALL Java_com_zte_liaoxy_myGLRenderer_nativeDrawGif(JNIEnv* env, jobject thiz, jobject canvas, jobject paint, jlong gifid, jint left, jint top)
{
 SkMovie* movie = reinterpret_cast<SkMovie*>(gifid);
 LOGE("draw gif %p (%lld)", movie, gifid);
    if (NULL != canvas && NULL != movie) {
  SkMSec duration = movie->duration();
  SkMSec time = 0;
  if (duration) {
   time = SkTime::GetMSecs() % duration;
   movie->setTime(time);
  } else {
   movie->setTime(0);
  }
  SkCanvas *skCanvas = GraphicsJNI::getNativeCanvas(env, canvas);
  SkPaint *skPaint = NULL;
  if (NULL != paint) {
   skPaint = GraphicsJNI::getNativePaint(env, paint);
  } else {
   LOGE("  !!NO Paint!!");
  }
  LOGE("  begin drawing  %d/%d on native canvas %p", time, duration, skCanvas);
  if (NULL != skCanvas) {
   if (NULL != skPaint) {
    skPaint->setColor(SK_ColorBLACK);
    SkRect rect;
    rect.set(10, 10, left, top);
    skCanvas->drawRect(rect, *skPaint);
   }
   const SkBitmap& bitmap = movie->bitmap();
   LOGE("=======nativeDrawGif    drawing bitmap %p to the native canvas at (%d, %d)", &bitmap, left, top);
   skCanvas->drawBitmap(bitmap, SkIntToScalar(left), SkIntToScalar(top), skPaint);
  }
 }
}