JNIEXPORT jobject JNICALL Java_com_badlogic_gdx_graphics_glutils_ETC1_encodeImagePKM
(JNIEnv *env, jclass, jobject imageData, jint offset, jint width, jint height, jint pixelSize) {
etc1_byte* imgPtr = (etc1_byte*)env->GetDirectBufferAddress(imageData) + offset;
int compressedSize = etc1_get_encoded_data_size(width, height);
etc1_byte* comprPtr = (etc1_byte*)malloc(compressedSize + ETC_PKM_HEADER_SIZE);
etc1_pkm_format_header(comprPtr, width, height);
etc1_encode_image(imgPtr, width, height, pixelSize, width * pixelSize, comprPtr + ETC_PKM_HEADER_SIZE);
return env->NewDirectByteBuffer(comprPtr, compressedSize + ETC_PKM_HEADER_SIZE);
}
JNIEXPORT void JNICALL Java_com_badlogic_gdx_graphics_glutils_ETC1_formatHeader(JNIEnv* env, jclass clazz, jobject obj_header, jint offset, jint width, jint height) {
char* header = (char*)(obj_header?env->GetDirectBufferAddress(obj_header):0);
//@line:214
etc1_pkm_format_header((etc1_byte*)header + offset, width, height);
}
static inline jobject wrapped_Java_com_badlogic_gdx_graphics_glutils_ETC1_encodeImagePKM
(JNIEnv* env, jclass clazz, jobject obj_imageData, jint offset, jint width, jint height, jint pixelSize, char* imageData) {
//@line:274
int compressedSize = etc1_get_encoded_data_size(width, height);
etc1_byte* compressed = (etc1_byte*)malloc(compressedSize + ETC_PKM_HEADER_SIZE);
etc1_pkm_format_header(compressed, width, height);
etc1_encode_image((etc1_byte*)imageData + offset, width, height, pixelSize, width * pixelSize, compressed + ETC_PKM_HEADER_SIZE);
return env->NewDirectByteBuffer(compressed, compressedSize + ETC_PKM_HEADER_SIZE);
}
/**
* Remove the last row and column of ETC1 blocks, effectively
* making a texture that started as power of two into a texture
* that is no longer power of two...
*/
bool slice_etc1_data(void *data, int* width, int* height) {
// First, parse the data and get to it...
etc1_byte *origData = reinterpret_cast<etc1_byte *>(data);
if (!etc1_pkm_is_valid(origData)) {
return false;
}
int origW = etc1_pkm_get_width(origData);
int origH = etc1_pkm_get_height(origData);
int blockWidth = (origW + 3) >> 2;
int blockHeight = (origH + 3) >> 2;
// Make sure that we have blocks to trim off..
if (blockWidth < 2 || blockHeight < 2) {
return false;
}
int newWidth = (blockWidth - 1) << 2;
int newHeight = (blockHeight - 1) << 2;
size_t newDataSz = etc1_get_encoded_data_size(newWidth, newHeight) + ETC_PKM_HEADER_SIZE;
SkAutoMalloc am(newDataSz);
etc1_byte *newData = reinterpret_cast<etc1_byte *>(am.get());
etc1_pkm_format_header(newData, newWidth, newHeight);
newData += ETC_PKM_HEADER_SIZE;
origData += ETC_PKM_HEADER_SIZE;
for (int j = 0; j < blockHeight - 1; ++j) {
memcpy(newData, origData, (blockWidth - 1)*ETC1_ENCODED_BLOCK_SIZE);
origData += blockWidth*ETC1_ENCODED_BLOCK_SIZE;
newData += (blockWidth - 1)*ETC1_ENCODED_BLOCK_SIZE;
}
// Stick the data back whence it came
memcpy(data, am.get(), newDataSz);
*width = newWidth;
*height = newHeight;
return true;
}
JNIEXPORT void JNICALL Java_com_badlogic_gdx_graphics_glutils_ETC1_formatHeader
(JNIEnv *env, jclass, jobject header, jint offset, jint width, jint height) {
etc1_byte* headerPtr = (etc1_byte*)env->GetDirectBufferAddress(header) + offset;
etc1_pkm_format_header(headerPtr, width, height);
}
