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#include "bitmap.hpp"
#include <android/bitmap.h>
namespace mbgl {
namespace android {
class PixelGuard {
public:
PixelGuard(jni::JNIEnv& env_, jni::Object<Bitmap> bitmap_) : env(env_), bitmap(bitmap_) {
const int result = AndroidBitmap_lockPixels(&env, jni::Unwrap(*bitmap),
reinterpret_cast<void**>(&address));
if (result != ANDROID_BITMAP_RESULT_SUCCESS) {
throw std::runtime_error("bitmap decoding: could not lock pixels");
}
}
~PixelGuard() {
const int result = AndroidBitmap_unlockPixels(&env, jni::Unwrap(*bitmap));
if (result != ANDROID_BITMAP_RESULT_SUCCESS) {
throw std::runtime_error("bitmap decoding: could not unlock pixels");
}
}
auto* get() {
return address;
}
const auto* get() const {
return address;
}
private:
jni::JNIEnv& env;
jni::Object<Bitmap> bitmap;
uint8_t* address;
};
void Bitmap::Config::registerNative(jni::JNIEnv& env) {
_class = *jni::Class<Config>::Find(env).NewGlobalRef(env).release();
}
jni::Class<Bitmap::Config> Bitmap::Config::_class;
jni::Object<Bitmap::Config> Bitmap::Config::Create(jni::JNIEnv& env, Value value) {
switch (value) {
case ALPHA_8:
return _class.Get(env,
jni::StaticField<Config, jni::Object<Config>>(env, _class, "ALPHA_8"));
case ARGB_4444:
return _class.Get(env,
jni::StaticField<Config, jni::Object<Config>>(env, _class, "ARGB_4444"));
case ARGB_8888:
return _class.Get(env,
jni::StaticField<Config, jni::Object<Config>>(env, _class, "ARGB_8888"));
case RGB_565:
return _class.Get(env,
jni::StaticField<Config, jni::Object<Config>>(env, _class, "RGB_565"));
default:
throw std::runtime_error("invalid enum value for Bitmap.Config");
}
}
void Bitmap::registerNative(jni::JNIEnv& env) {
_class = *jni::Class<Bitmap>::Find(env).NewGlobalRef(env).release();
Config::registerNative(env);
}
jni::Class<Bitmap> Bitmap::_class;
jni::Object<Bitmap> Bitmap::CreateBitmap(jni::JNIEnv& env,
jni::jint width,
jni::jint height,
jni::Object<Config> config) {
using Signature = jni::Object<Bitmap>(jni::jint, jni::jint, jni::Object<Config>);
auto method = _class.GetStaticMethod<Signature>(env, "createBitmap");
return _class.Call(env, method, width, height, config);
}
jni::Object<Bitmap> Bitmap::CreateBitmap(jni::JNIEnv& env, const PremultipliedImage& image) {
auto bitmap = CreateBitmap(env, image.size.width, image.size.height, Config::ARGB_8888);
AndroidBitmapInfo info;
const int result = AndroidBitmap_getInfo(&env, jni::Unwrap(*bitmap), &info);
if (result != ANDROID_BITMAP_RESULT_SUCCESS) {
// TODO: more specific information
throw std::runtime_error("bitmap creation: couldn't get bitmap info");
}
assert(info.width == image.size.width);
assert(info.height == image.size.height);
assert(info.format == ANDROID_BITMAP_FORMAT_RGBA_8888);
PixelGuard guard(env, bitmap);
// Copy the PremultipliedImage into the Android Bitmap
for (uint32_t y = 0; y < image.size.height; y++) {
auto begin = image.data.get() + y * image.stride();
std::copy(begin, begin + image.stride(), guard.get() + y * info.stride);
}
return bitmap;
}
PremultipliedImage Bitmap::GetImage(jni::JNIEnv& env, jni::Object<Bitmap> bitmap) {
AndroidBitmapInfo info;
const int result = AndroidBitmap_getInfo(&env, jni::Unwrap(*bitmap), &info);
if (result != ANDROID_BITMAP_RESULT_SUCCESS) {
// TODO: more specific information
throw std::runtime_error("bitmap decoding: couldn't get bitmap info");
}
if (info.format != ANDROID_BITMAP_FORMAT_RGBA_8888) {
// TODO: convert
throw std::runtime_error("bitmap decoding: bitmap format invalid");
}
const PixelGuard guard(env, bitmap);
// Copy the Android Bitmap into the PremultipliedImage.
auto pixels =
std::make_unique<uint8_t[]>(info.width * info.height * PremultipliedImage::channels);
for (uint32_t y = 0; y < info.height; y++) {
auto begin = guard.get() + y * info.stride;
std::copy(begin, begin + info.width * PremultipliedImage::channels,
pixels.get() + y * info.width * PremultipliedImage::channels);
}
return { Size{ info.width, info.height }, std::move(pixels) };
}
} // namespace android
} // namespace mbgl
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