Add direct java wrapper to native libjpeg-turbo + some helper classes

Author: dwillmc

jpegkit/src/main/assets/cat.jpg app/src/main/assets/cat.jpgjpegkit/src/main/assets/cat.jpg renamed to app/src/main/assets/cat.jpg

@@ -1,13 +1,25 @@
 cmake_minimum_required(VERSION 3.4.1)
 
-set(JPEG_INC_DIR ${CMAKE_SOURCE_DIR}/src/main/cpp/libjpeg/include)
-set(JPEG_BUILD_DIR ${CMAKE_SOURCE_DIR}/src/main/jniLibs)
-
-include_directories(${JPEG_INC_DIR})
+include_directories(${CMAKE_SOURCE_DIR}/src/main/cpp/libjpeg/include)
 
 add_library(libjpeg STATIC IMPORTED)
-set_target_properties(libjpeg PROPERTIES IMPORTED_LOCATION ${JPEG_BUILD_DIR}/${ANDROID_ABI}/libjpeg-turbo.a)
+set_target_properties(
+    libjpeg
+    PROPERTIES
+    IMPORTED_LOCATION
+    ${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libjpeg-turbo.a
+)
+
+include_directories(src/main/cpp/jpegkit/include)
+file(GLOB SOURCES "src/main/cpp/jpegkit/*.cpp")
+add_library(jpegkit SHARED ${SOURCES})
 
-add_library(jpegkit SHARED ${CMAKE_SOURCE_DIR}/src/main/cpp/JniJpeg.cpp)
+find_library(android-lib android)
+find_library(gl-lib GLESv2)
 
-target_link_libraries(jpegkit libjpeg)
+target_link_libraries(
+    jpegkit
+    libjpeg
+    ${android-lib}
+    ${gl-lib}
+)

jpegkit/CMakeLists.txt

@@ -111,7 +111,7 @@ task deployRelease {
 }
 
 group = 'com.camerakit'
-version = '0.2.0'
+version = '0.2.0-alpha1'
 
 install {
     repositories.mavenInstaller {

jpegkit/build.gradle

@@ -0,0 +1,11 @@
+#ifndef __JKUTILS_H__
+#define __JKUTILS_H__
+
+#include <jni.h>
+#include <unistd.h>
+#include <turbojpeg.h>
+#include <GLES2/gl2.h>
+
+typedef struct { unsigned char *bytes; } Allocation;
+
+#endif

jpegkit/src/main/cpp/jpegkit/include/platform.h

@@ -201,4 +201,4 @@ Java_com_jpegkit_Jpeg_jniCrop
     transform->options = TJXOPT_CROP;
 
     tjTransform(jpeg->transformer, jpeg->buffer, jpeg->size, 1, &jpeg->buffer, &jpeg->size, transform, 0);
-}
+}

jpegkit/src/main/cpp/JniJpeg.cpp jpegkit/src/main/cpp/jpegkit/jpeg.cppjpegkit/src/main/cpp/JniJpeg.cpp renamed to jpegkit/src/main/cpp/jpegkit/jpeg.cpp

@@ -0,0 +1,21 @@
+#include "platform.h"
+#include <memory>
+#include <android/native_window.h>
+#include <android/native_activity.h>
+#include <android/surface_texture.h>
+#include <android/native_window_jni.h>
+
+extern "C" JNIEXPORT void JNICALL
+Java_com_jpegkit_JpegView_renderJpeg(JNIEnv *env, jobject obj, jobject surface, jlong allocHandle, jlong jpegSize, jint width, jint height) {
+    ANativeWindow *window = ANativeWindow_fromSurface(env, surface);
+    ANativeWindow_setBuffersGeometry(window, width, height, WINDOW_FORMAT_RGBA_8888);
+    ANativeWindow_Buffer windowBuffer;
+    if (ANativeWindow_lock(window, &windowBuffer, NULL) == 0) {
+        Allocation *alloc = (Allocation *) allocHandle;
+        unsigned char *jpegBuf = alloc->bytes;
+        memcpy(windowBuffer.bits, jpegBuf, (size_t) jpegSize);
+        ANativeWindow_unlockAndPost(window);
+    }
+}
+
+