2 ** Copyright 2007, The Android Open Source Project
4 ** Licensed under the Apache License, Version 2.0 (the "License");
5 ** you may not use this file except in compliance with the License.
6 ** You may obtain a copy of the License at
8 ** http://www.apache.org/licenses/LICENSE-2.0
10 ** Unless required by applicable law or agreed to in writing, software
11 ** distributed under the License is distributed on an "AS IS" BASIS,
12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 ** See the License for the specific language governing permissions and
14 ** limitations under the License.
19 #include "GraphicsJNI.h"
29 #include <ETC1/etc1.h>
33 #include "core_jni_helpers.h"
36 #define LOG_TAG "OpenGLUtil"
37 #include <utils/Log.h>
38 #include "utils/misc.h"
45 void mx4transform(float x, float y, float z, float w, const float* pM, float* pDest) {
46 pDest[0] = pM[0 + 4 * 0] * x + pM[0 + 4 * 1] * y + pM[0 + 4 * 2] * z + pM[0 + 4 * 3] * w;
47 pDest[1] = pM[1 + 4 * 0] * x + pM[1 + 4 * 1] * y + pM[1 + 4 * 2] * z + pM[1 + 4 * 3] * w;
48 pDest[2] = pM[2 + 4 * 0] * x + pM[2 + 4 * 1] * y + pM[2 + 4 * 2] * z + pM[2 + 4 * 3] * w;
49 pDest[3] = pM[3 + 4 * 0] * x + pM[3 + 4 * 1] * y + pM[3 + 4 * 2] * z + pM[3 + 4 * 3] * w;
64 void* alloc(size_t size) {
76 print_poly(const char* label, Poly* pPoly) {
77 ALOGI("%s: %d verts", label, pPoly->n);
78 for(int i = 0; i < pPoly->n; i++) {
79 Poly_vert* pV = & pPoly->vert[i];
80 ALOGI("[%d] %g, %g, %g %g", i, pV->sx, pV->sy, pV->sz, pV->sw);
86 int visibilityTest(float* pWS, float* pPositions, int positionsLength,
87 unsigned short* pIndices, int indexCount) {
88 MallocHelper mallocHelper;
89 int result = POLY_CLIP_OUT;
90 float* pTransformed = 0;
91 int transformedIndexCount = 0;
93 if ( indexCount < 3 ) {
97 // Find out how many vertices we need to transform
98 // We transform every vertex between the min and max indices, inclusive.
99 // This is OK for the data sets we expect to use with this function, but
100 // for other loads it might be better to use a more sophisticated vertex
101 // cache of some sort.
103 int minIndex = 65536;
105 for(int i = 0; i < indexCount; i++) {
106 int index = pIndices[i];
107 if ( index < minIndex ) {
110 if ( index > maxIndex ) {
115 if ( maxIndex * 3 > positionsLength) {
119 transformedIndexCount = maxIndex - minIndex + 1;
120 pTransformed = (float*) mallocHelper.alloc(transformedIndexCount * 4 * sizeof(float));
122 if (pTransformed == 0 ) {
126 // Transform the vertices
128 const float* pSrc = pPositions + 3 * minIndex;
129 float* pDst = pTransformed;
130 for (int i = 0; i < transformedIndexCount; i++, pSrc += 3, pDst += 4) {
131 mx4transform(pSrc[0], pSrc[1], pSrc[2], 1.0f, pWS, pDst);
135 // Clip the triangles
138 float* pDest = & poly.vert[0].sx;
139 for (int i = 0; i < indexCount; i += 3) {
141 memcpy(pDest , pTransformed + 4 * (pIndices[i ] - minIndex), 4 * sizeof(float));
142 memcpy(pDest + 4, pTransformed + 4 * (pIndices[i + 1] - minIndex), 4 * sizeof(float));
143 memcpy(pDest + 8, pTransformed + 4 * (pIndices[i + 2] - minIndex), 4 * sizeof(float));
144 result = poly_clip_to_frustum(&poly);
145 if ( result != POLY_CLIP_OUT) {
153 class ByteArrayGetter {
155 static void* Get(JNIEnv* _env, jbyteArray array, jboolean* is_copy) {
156 return _env->GetByteArrayElements(array, is_copy);
159 class BooleanArrayGetter {
161 static void* Get(JNIEnv* _env, jbooleanArray array, jboolean* is_copy) {
162 return _env->GetBooleanArrayElements(array, is_copy);
165 class CharArrayGetter {
167 static void* Get(JNIEnv* _env, jcharArray array, jboolean* is_copy) {
168 return _env->GetCharArrayElements(array, is_copy);
171 class ShortArrayGetter {
173 static void* Get(JNIEnv* _env, jshortArray array, jboolean* is_copy) {
174 return _env->GetShortArrayElements(array, is_copy);
177 class IntArrayGetter {
179 static void* Get(JNIEnv* _env, jintArray array, jboolean* is_copy) {
180 return _env->GetIntArrayElements(array, is_copy);
183 class LongArrayGetter {
185 static void* Get(JNIEnv* _env, jlongArray array, jboolean* is_copy) {
186 return _env->GetLongArrayElements(array, is_copy);
189 class FloatArrayGetter {
191 static void* Get(JNIEnv* _env, jfloatArray array, jboolean* is_copy) {
192 return _env->GetFloatArrayElements(array, is_copy);
195 class DoubleArrayGetter {
197 static void* Get(JNIEnv* _env, jdoubleArray array, jboolean* is_copy) {
198 return _env->GetDoubleArrayElements(array, is_copy);
202 class ByteArrayReleaser {
204 static void Release(JNIEnv* _env, jbyteArray array, jbyte* data, jint mode) {
205 _env->ReleaseByteArrayElements(array, data, mode);
208 class BooleanArrayReleaser {
210 static void Release(JNIEnv* _env, jbooleanArray array, jboolean* data, jint mode) {
211 _env->ReleaseBooleanArrayElements(array, data, mode);
214 class CharArrayReleaser {
216 static void Release(JNIEnv* _env, jcharArray array, jchar* data, jint mode) {
217 _env->ReleaseCharArrayElements(array, data, mode);
220 class ShortArrayReleaser {
222 static void Release(JNIEnv* _env, jshortArray array, jshort* data, jint mode) {
223 _env->ReleaseShortArrayElements(array, data, mode);
226 class IntArrayReleaser {
228 static void Release(JNIEnv* _env, jintArray array, jint* data, jint mode) {
229 _env->ReleaseIntArrayElements(array, data, mode);
232 class LongArrayReleaser {
234 static void Release(JNIEnv* _env, jlongArray array, jlong* data, jint mode) {
235 _env->ReleaseLongArrayElements(array, data, mode);
238 class FloatArrayReleaser {
240 static void Release(JNIEnv* _env, jfloatArray array, jfloat* data, jint mode) {
241 _env->ReleaseFloatArrayElements(array, data, mode);
244 class DoubleArrayReleaser {
246 static void Release(JNIEnv* _env, jdoubleArray array, jdouble* data, jint mode) {
247 _env->ReleaseDoubleArrayElements(array, data, mode);
251 template<class JArray, class T, class ArrayGetter, class ArrayReleaser>
254 ArrayHelper(JNIEnv* env, JArray ref, jint offset, jint minSize) {
260 mReleaseParam = JNI_ABORT;
265 ArrayReleaser::Release(mEnv, mRef, mBase, mReleaseParam);
269 // We seperate the bounds check from the initialization because we want to
270 // be able to bounds-check multiple arrays, and we can't throw an exception
271 // after we've called GetPrimitiveArrayCritical.
273 // Return true if the bounds check succeeded
274 // Else instruct the runtime to throw an exception
278 doThrowIAE(mEnv, "array == null");
282 doThrowIAE(mEnv, "offset < 0");
285 mLength = mEnv->GetArrayLength(mRef) - mOffset;
286 if (mLength < mMinSize ) {
287 doThrowIAE(mEnv, "length - offset < n");
296 mBase = (T*) ArrayGetter::Get(mEnv, mRef, (jboolean *) 0);
297 mData = mBase + mOffset;
300 void commitChanges() {
316 typedef ArrayHelper<jfloatArray, float, FloatArrayGetter, FloatArrayReleaser> FloatArrayHelper;
317 typedef ArrayHelper<jcharArray, unsigned short, CharArrayGetter, CharArrayReleaser> UnsignedShortArrayHelper;
318 typedef ArrayHelper<jintArray, int, IntArrayGetter, IntArrayReleaser> IntArrayHelper;
319 typedef ArrayHelper<jbyteArray, unsigned char, ByteArrayGetter, ByteArrayReleaser> ByteArrayHelper;
321 inline float distance2(float x, float y, float z) {
322 return x * x + y * y + z * z;
325 inline float distance(float x, float y, float z) {
326 return sqrtf(distance2(x, y, z));
330 void util_computeBoundingSphere(JNIEnv *env, jclass clazz,
331 jfloatArray positions_ref, jint positionsOffset, jint positionsCount,
332 jfloatArray sphere_ref, jint sphereOffset) {
333 FloatArrayHelper positions(env, positions_ref, positionsOffset, 0);
334 FloatArrayHelper sphere(env, sphere_ref, sphereOffset, 4);
336 bool checkOK = positions.check() && sphere.check();
344 if ( positionsCount < 1 ) {
345 doThrowIAE(env, "positionsCount < 1");
349 const float* pSrc = positions.mData;
359 for(int i = 1; i < positionsCount; i++) {
389 // Because we know our input meshes fit pretty well into bounding boxes,
390 // just take the diagonal of the box as defining our sphere.
391 float* pSphere = sphere.mData;
395 *pSphere++ = x0 + dx * 0.5f;
396 *pSphere++ = y0 + dy * 0.5f;
397 *pSphere++ = z0 + dz * 0.5f;
398 *pSphere++ = distance(dx, dy, dz) * 0.5f;
400 sphere.commitChanges();
403 static void normalizePlane(float* p) {
404 float rdist = 1.0f / distance(p[0], p[1], p[2]);
405 for(int i = 0; i < 4; i++) {
410 static inline float dot3(float x0, float y0, float z0, float x1, float y1, float z1) {
411 return x0 * x1 + y0 * y1 + z0 * z1;
414 static inline float signedDistance(const float* pPlane, float x, float y, float z) {
415 return dot3(pPlane[0], pPlane[1], pPlane[2], x, y, z) + pPlane[3];
418 // Return true if the sphere intersects or is inside the frustum
420 static bool sphereHitsFrustum(const float* pFrustum, const float* pSphere) {
421 float x = pSphere[0];
422 float y = pSphere[1];
423 float z = pSphere[2];
424 float negRadius = -pSphere[3];
425 for (int i = 0; i < 6; i++, pFrustum += 4) {
426 if (signedDistance(pFrustum, x, y, z) <= negRadius) {
433 static void computeFrustum(const float* m, float* f) {
487 jint util_frustumCullSpheres(JNIEnv *env, jclass clazz,
488 jfloatArray mvp_ref, jint mvpOffset,
489 jfloatArray spheres_ref, jint spheresOffset, jint spheresCount,
490 jintArray results_ref, jint resultsOffset, jint resultsCapacity) {
495 FloatArrayHelper mvp(env, mvp_ref, mvpOffset, 16);
496 FloatArrayHelper spheres(env, spheres_ref, spheresOffset, spheresCount * 4);
497 IntArrayHelper results(env, results_ref, resultsOffset, resultsCapacity);
499 bool initializedOK = mvp.check() && spheres.check() && results.check();
500 if (! initializedOK) {
508 computeFrustum(mvp.mData, frustum);
512 pSphere = spheres.mData;
513 pResults = results.mData;
515 for(int i = 0; i < spheresCount; i++, pSphere += 4) {
516 if (sphereHitsFrustum(frustum, pSphere)) {
517 if (outputCount < resultsCapacity) {
523 results.commitChanges();
528 public native int visibilityTest(float[] ws, int wsOffset,
529 float[] positions, int positionsOffset,
530 char[] indices, int indicesOffset, int indexCount);
534 jint util_visibilityTest(JNIEnv *env, jclass clazz,
535 jfloatArray ws_ref, jint wsOffset,
536 jfloatArray positions_ref, jint positionsOffset,
537 jcharArray indices_ref, jint indicesOffset, jint indexCount) {
539 FloatArrayHelper ws(env, ws_ref, wsOffset, 16);
540 FloatArrayHelper positions(env, positions_ref, positionsOffset, 0);
541 UnsignedShortArrayHelper indices(env, indices_ref, indicesOffset, 0);
543 bool checkOK = ws.check() && positions.check() && indices.check();
545 // Return value will be ignored, because an exception has been thrown.
549 if (indices.mLength < indexCount) {
550 doThrowIAE(env, "length < offset + indexCount");
558 return visibilityTest(ws.mData,
559 positions.mData, positions.mLength,
560 indices.mData, indexCount);
563 #define I(_i, _j) ((_j)+ 4*(_i))
566 void multiplyMM(float* r, const float* lhs, const float* rhs)
568 for (int i=0 ; i<4 ; i++) {
569 const float rhs_i0 = rhs[ I(i,0) ];
570 float ri0 = lhs[ I(0,0) ] * rhs_i0;
571 float ri1 = lhs[ I(0,1) ] * rhs_i0;
572 float ri2 = lhs[ I(0,2) ] * rhs_i0;
573 float ri3 = lhs[ I(0,3) ] * rhs_i0;
574 for (int j=1 ; j<4 ; j++) {
575 const float rhs_ij = rhs[ I(i,j) ];
576 ri0 += lhs[ I(j,0) ] * rhs_ij;
577 ri1 += lhs[ I(j,1) ] * rhs_ij;
578 ri2 += lhs[ I(j,2) ] * rhs_ij;
579 ri3 += lhs[ I(j,3) ] * rhs_ij;
589 void util_multiplyMM(JNIEnv *env, jclass clazz,
590 jfloatArray result_ref, jint resultOffset,
591 jfloatArray lhs_ref, jint lhsOffset,
592 jfloatArray rhs_ref, jint rhsOffset) {
594 FloatArrayHelper resultMat(env, result_ref, resultOffset, 16);
595 FloatArrayHelper lhs(env, lhs_ref, lhsOffset, 16);
596 FloatArrayHelper rhs(env, rhs_ref, rhsOffset, 16);
598 bool checkOK = resultMat.check() && lhs.check() && rhs.check();
608 multiplyMM(resultMat.mData, lhs.mData, rhs.mData);
610 resultMat.commitChanges();
614 void multiplyMV(float* r, const float* lhs, const float* rhs)
616 mx4transform(rhs[0], rhs[1], rhs[2], rhs[3], lhs, r);
620 void util_multiplyMV(JNIEnv *env, jclass clazz,
621 jfloatArray result_ref, jint resultOffset,
622 jfloatArray lhs_ref, jint lhsOffset,
623 jfloatArray rhs_ref, jint rhsOffset) {
625 FloatArrayHelper resultV(env, result_ref, resultOffset, 4);
626 FloatArrayHelper lhs(env, lhs_ref, lhsOffset, 16);
627 FloatArrayHelper rhs(env, rhs_ref, rhsOffset, 4);
629 bool checkOK = resultV.check() && lhs.check() && rhs.check();
639 multiplyMV(resultV.mData, lhs.mData, rhs.mData);
641 resultV.commitChanges();
644 // ---------------------------------------------------------------------------
646 extern void setGLDebugLevel(int level);
647 void setTracingLevel(JNIEnv *env, jclass clazz, jint level)
649 setGLDebugLevel(level);
652 static int checkFormat(SkColorType colorType, int format, int type)
655 case kIndex_8_SkColorType:
656 if (format == GL_PALETTE8_RGBA8_OES)
658 case kN32_SkColorType:
659 case kAlpha_8_SkColorType:
660 if (type == GL_UNSIGNED_BYTE)
662 case kARGB_4444_SkColorType:
663 case kRGB_565_SkColorType:
665 case GL_UNSIGNED_SHORT_4_4_4_4:
666 case GL_UNSIGNED_SHORT_5_6_5:
667 case GL_UNSIGNED_SHORT_5_5_5_1:
669 case GL_UNSIGNED_BYTE:
670 if (format == GL_LUMINANCE_ALPHA)
680 static int getInternalFormat(SkColorType colorType)
683 case kAlpha_8_SkColorType:
685 case kARGB_4444_SkColorType:
687 case kN32_SkColorType:
689 case kIndex_8_SkColorType:
690 return GL_PALETTE8_RGBA8_OES;
691 case kRGB_565_SkColorType:
698 static int getType(SkColorType colorType)
701 case kAlpha_8_SkColorType:
702 return GL_UNSIGNED_BYTE;
703 case kARGB_4444_SkColorType:
704 return GL_UNSIGNED_SHORT_4_4_4_4;
705 case kN32_SkColorType:
706 return GL_UNSIGNED_BYTE;
707 case kIndex_8_SkColorType:
708 return -1; // No type for compressed data.
709 case kRGB_565_SkColorType:
710 return GL_UNSIGNED_SHORT_5_6_5;
716 static jint util_getInternalFormat(JNIEnv *env, jclass clazz,
719 SkBitmap nativeBitmap;
720 GraphicsJNI::getSkBitmap(env, jbitmap, &nativeBitmap);
721 return getInternalFormat(nativeBitmap.colorType());
724 static jint util_getType(JNIEnv *env, jclass clazz,
727 SkBitmap nativeBitmap;
728 GraphicsJNI::getSkBitmap(env, jbitmap, &nativeBitmap);
729 return getType(nativeBitmap.colorType());
732 static jint util_texImage2D(JNIEnv *env, jclass clazz,
733 jint target, jint level, jint internalformat,
734 jobject jbitmap, jint type, jint border)
737 GraphicsJNI::getSkBitmap(env, jbitmap, &bitmap);
738 SkColorType colorType = bitmap.colorType();
739 if (internalformat < 0) {
740 internalformat = getInternalFormat(colorType);
743 type = getType(colorType);
745 int err = checkFormat(colorType, internalformat, type);
749 const int w = bitmap.width();
750 const int h = bitmap.height();
751 const void* p = bitmap.getPixels();
752 if (internalformat == GL_PALETTE8_RGBA8_OES) {
753 if (sizeof(SkPMColor) != sizeof(uint32_t)) {
757 const size_t size = bitmap.getSize();
758 const size_t palette_size = 256*sizeof(SkPMColor);
759 const size_t imageSize = size + palette_size;
760 void* const data = malloc(imageSize);
762 void* const pixels = (char*)data + palette_size;
763 SkColorTable* ctable = bitmap.getColorTable();
764 memcpy(data, ctable->readColors(), ctable->count() * sizeof(SkPMColor));
765 memcpy(pixels, p, size);
766 glCompressedTexImage2D(target, level, internalformat, w, h, border, imageSize, data);
772 glTexImage2D(target, level, internalformat, w, h, border, internalformat, type, p);
775 bitmap.unlockPixels();
779 static jint util_texSubImage2D(JNIEnv *env, jclass clazz,
780 jint target, jint level, jint xoffset, jint yoffset,
781 jobject jbitmap, jint format, jint type)
784 GraphicsJNI::getSkBitmap(env, jbitmap, &bitmap);
785 SkColorType colorType = bitmap.colorType();
787 format = getInternalFormat(colorType);
788 if (format == GL_PALETTE8_RGBA8_OES)
789 return -1; // glCompressedTexSubImage2D() not supported
791 int err = checkFormat(colorType, format, type);
795 const int w = bitmap.width();
796 const int h = bitmap.height();
797 const void* p = bitmap.getPixels();
798 glTexSubImage2D(target, level, xoffset, yoffset, w, h, format, type, p);
799 bitmap.unlockPixels();
807 static jclass nioAccessClass;
808 static jclass bufferClass;
809 static jmethodID getBasePointerID;
810 static jmethodID getBaseArrayID;
811 static jmethodID getBaseArrayOffsetID;
812 static jfieldID positionID;
813 static jfieldID limitID;
814 static jfieldID elementSizeShiftID;
816 /* Cache method IDs each time the class is loaded. */
819 nativeClassInitBuffer(JNIEnv *env)
821 jclass nioAccessClassLocal = FindClassOrDie(env, "java/nio/NIOAccess");
822 nioAccessClass = MakeGlobalRefOrDie(env, nioAccessClassLocal);
823 getBasePointerID = GetStaticMethodIDOrDie(env, nioAccessClass,
824 "getBasePointer", "(Ljava/nio/Buffer;)J");
825 getBaseArrayID = GetStaticMethodIDOrDie(env, nioAccessClass,
826 "getBaseArray", "(Ljava/nio/Buffer;)Ljava/lang/Object;");
827 getBaseArrayOffsetID = GetStaticMethodIDOrDie(env, nioAccessClass,
828 "getBaseArrayOffset", "(Ljava/nio/Buffer;)I");
830 jclass bufferClassLocal = FindClassOrDie(env, "java/nio/Buffer");
831 bufferClass = MakeGlobalRefOrDie(env, bufferClassLocal);
832 positionID = GetFieldIDOrDie(env, bufferClass, "position", "I");
833 limitID = GetFieldIDOrDie(env, bufferClass, "limit", "I");
834 elementSizeShiftID = GetFieldIDOrDie(env, bufferClass, "_elementSizeShift", "I");
838 getPointer(JNIEnv *_env, jobject buffer, jint *remaining)
842 jint elementSizeShift;
845 position = _env->GetIntField(buffer, positionID);
846 limit = _env->GetIntField(buffer, limitID);
847 elementSizeShift = _env->GetIntField(buffer, elementSizeShiftID);
848 *remaining = (limit - position) << elementSizeShift;
849 pointer = _env->CallStaticLongMethod(nioAccessClass,
850 getBasePointerID, buffer);
852 return reinterpret_cast<void *>(pointer);
859 BufferHelper(JNIEnv *env, jobject buffer) {
866 bool checkPointer(const char* errorMessage) {
868 mData = getPointer(mEnv, mBuffer, &mRemaining);
870 doThrowIAE(mEnv, errorMessage);
872 return mData != NULL;
874 doThrowIAE(mEnv, errorMessage);
879 inline void* getData() {
883 inline jint remaining() {
895 * Encode a block of pixels.
897 * @param in a pointer to a ETC1_DECODED_BLOCK_SIZE array of bytes that represent a
898 * 4 x 4 square of 3-byte pixels in form R, G, B. Byte (3 * (x + 4 * y) is the R
899 * value of pixel (x, y).
901 * @param validPixelMask is a 16-bit mask where bit (1 << (x + y * 4)) indicates whether
902 * the corresponding (x,y) pixel is valid. Invalid pixel color values are ignored when compressing.
904 * @param out an ETC1 compressed version of the data.
907 static void etc1_encodeBlock(JNIEnv *env, jclass clazz,
908 jobject in, jint validPixelMask, jobject out) {
909 if (validPixelMask < 0 || validPixelMask > 15) {
910 doThrowIAE(env, "validPixelMask");
913 BufferHelper inB(env, in);
914 BufferHelper outB(env, out);
915 if (inB.checkPointer("in") && outB.checkPointer("out")) {
916 if (inB.remaining() < ETC1_DECODED_BLOCK_SIZE) {
917 doThrowIAE(env, "in's remaining data < DECODED_BLOCK_SIZE");
918 } else if (outB.remaining() < ETC1_ENCODED_BLOCK_SIZE) {
919 doThrowIAE(env, "out's remaining data < ENCODED_BLOCK_SIZE");
921 etc1_encode_block((etc1_byte*) inB.getData(), validPixelMask,
922 (etc1_byte*) outB.getData());
928 * Decode a block of pixels.
930 * @param in an ETC1 compressed version of the data.
932 * @param out a pointer to a ETC_DECODED_BLOCK_SIZE array of bytes that represent a
933 * 4 x 4 square of 3-byte pixels in form R, G, B. Byte (3 * (x + 4 * y) is the R
934 * value of pixel (x, y).
936 static void etc1_decodeBlock(JNIEnv *env, jclass clazz,
937 jobject in, jobject out){
938 BufferHelper inB(env, in);
939 BufferHelper outB(env, out);
940 if (inB.checkPointer("in") && outB.checkPointer("out")) {
941 if (inB.remaining() < ETC1_ENCODED_BLOCK_SIZE) {
942 doThrowIAE(env, "in's remaining data < ENCODED_BLOCK_SIZE");
943 } else if (outB.remaining() < ETC1_DECODED_BLOCK_SIZE) {
944 doThrowIAE(env, "out's remaining data < DECODED_BLOCK_SIZE");
946 etc1_decode_block((etc1_byte*) inB.getData(),
947 (etc1_byte*) outB.getData());
953 * Return the size of the encoded image data (does not include size of PKM header).
955 static jint etc1_getEncodedDataSize(JNIEnv *env, jclass clazz,
956 jint width, jint height) {
957 return etc1_get_encoded_data_size(width, height);
961 * Encode an entire image.
962 * @param in pointer to the image data. Formatted such that
963 * pixel (x,y) is at pIn + pixelSize * x + stride * y + redOffset;
964 * @param out pointer to encoded data. Must be large enough to store entire encoded image.
966 static void etc1_encodeImage(JNIEnv *env, jclass clazz,
967 jobject in, jint width, jint height,
968 jint pixelSize, jint stride, jobject out) {
969 if (pixelSize < 2 || pixelSize > 3) {
970 doThrowIAE(env, "pixelSize must be 2 or 3");
973 BufferHelper inB(env, in);
974 BufferHelper outB(env, out);
975 if (inB.checkPointer("in") && outB.checkPointer("out")) {
976 jint imageSize = stride * height;
977 jint encodedImageSize = etc1_get_encoded_data_size(width, height);
978 if (inB.remaining() < imageSize) {
979 doThrowIAE(env, "in's remaining data < image size");
980 } else if (outB.remaining() < encodedImageSize) {
981 doThrowIAE(env, "out's remaining data < encoded image size");
983 etc1_encode_image((etc1_byte*) inB.getData(), width, height, pixelSize, stride,
984 (etc1_byte*) outB.getData());
990 * Decode an entire image.
991 * @param in the encoded data.
992 * @param out pointer to the image data. Will be written such that
993 * pixel (x,y) is at pIn + pixelSize * x + stride * y. Must be
994 * large enough to store entire image.
996 static void etc1_decodeImage(JNIEnv *env, jclass clazz,
997 jobject in, jobject out,
998 jint width, jint height,
999 jint pixelSize, jint stride) {
1000 if (pixelSize < 2 || pixelSize > 3) {
1001 doThrowIAE(env, "pixelSize must be 2 or 3");
1004 BufferHelper inB(env, in);
1005 BufferHelper outB(env, out);
1006 if (inB.checkPointer("in") && outB.checkPointer("out")) {
1007 jint imageSize = stride * height;
1008 jint encodedImageSize = etc1_get_encoded_data_size(width, height);
1009 if (inB.remaining() < encodedImageSize) {
1010 doThrowIAE(env, "in's remaining data < encoded image size");
1011 } else if (outB.remaining() < imageSize) {
1012 doThrowIAE(env, "out's remaining data < image size");
1014 etc1_decode_image((etc1_byte*) inB.getData(), (etc1_byte*) outB.getData(),
1015 width, height, pixelSize, stride);
1021 * Format a PKM header
1023 static void etc1_formatHeader(JNIEnv *env, jclass clazz,
1024 jobject header, jint width, jint height) {
1025 BufferHelper headerB(env, header);
1026 if (headerB.checkPointer("header") ){
1027 if (headerB.remaining() < ETC_PKM_HEADER_SIZE) {
1028 doThrowIAE(env, "header's remaining data < ETC_PKM_HEADER_SIZE");
1030 etc1_pkm_format_header((etc1_byte*) headerB.getData(), width, height);
1036 * Check if a PKM header is correctly formatted.
1038 static jboolean etc1_isValid(JNIEnv *env, jclass clazz,
1040 jboolean result = false;
1041 BufferHelper headerB(env, header);
1042 if (headerB.checkPointer("header") ){
1043 if (headerB.remaining() < ETC_PKM_HEADER_SIZE) {
1044 doThrowIAE(env, "header's remaining data < ETC_PKM_HEADER_SIZE");
1046 result = etc1_pkm_is_valid((etc1_byte*) headerB.getData());
1049 return result ? JNI_TRUE : JNI_FALSE;
1053 * Read the image width from a PKM header
1055 static jint etc1_getWidth(JNIEnv *env, jclass clazz,
1058 BufferHelper headerB(env, header);
1059 if (headerB.checkPointer("header") ){
1060 if (headerB.remaining() < ETC_PKM_HEADER_SIZE) {
1061 doThrowIAE(env, "header's remaining data < ETC_PKM_HEADER_SIZE");
1063 result = etc1_pkm_get_width((etc1_byte*) headerB.getData());
1070 * Read the image height from a PKM header
1072 static jint etc1_getHeight(JNIEnv *env, jclass clazz,
1075 BufferHelper headerB(env, header);
1076 if (headerB.checkPointer("header") ){
1077 if (headerB.remaining() < ETC_PKM_HEADER_SIZE) {
1078 doThrowIAE(env, "header's remaining data < ETC_PKM_HEADER_SIZE");
1080 result = etc1_pkm_get_height((etc1_byte*) headerB.getData());
1090 static JNINativeMethod gMatrixMethods[] = {
1091 { "multiplyMM", "!([FI[FI[FI)V", (void*)util_multiplyMM },
1092 { "multiplyMV", "!([FI[FI[FI)V", (void*)util_multiplyMV },
1095 static JNINativeMethod gVisibilityMethods[] = {
1096 { "computeBoundingSphere", "([FII[FI)V", (void*)util_computeBoundingSphere },
1097 { "frustumCullSpheres", "([FI[FII[III)I", (void*)util_frustumCullSpheres },
1098 { "visibilityTest", "([FI[FI[CII)I", (void*)util_visibilityTest },
1101 static JNINativeMethod gUtilsMethods[] = {
1102 { "native_getInternalFormat", "(Landroid/graphics/Bitmap;)I", (void*) util_getInternalFormat },
1103 { "native_getType", "(Landroid/graphics/Bitmap;)I", (void*) util_getType },
1104 { "native_texImage2D", "(IIILandroid/graphics/Bitmap;II)I", (void*)util_texImage2D },
1105 { "native_texSubImage2D", "(IIIILandroid/graphics/Bitmap;II)I", (void*)util_texSubImage2D },
1106 { "setTracingLevel", "(I)V", (void*)setTracingLevel },
1109 static JNINativeMethod gEtc1Methods[] = {
1110 { "encodeBlock", "(Ljava/nio/Buffer;ILjava/nio/Buffer;)V", (void*) etc1_encodeBlock },
1111 { "decodeBlock", "(Ljava/nio/Buffer;Ljava/nio/Buffer;)V", (void*) etc1_decodeBlock },
1112 { "getEncodedDataSize", "(II)I", (void*) etc1_getEncodedDataSize },
1113 { "encodeImage", "(Ljava/nio/Buffer;IIIILjava/nio/Buffer;)V", (void*) etc1_encodeImage },
1114 { "decodeImage", "(Ljava/nio/Buffer;Ljava/nio/Buffer;IIII)V", (void*) etc1_decodeImage },
1115 { "formatHeader", "(Ljava/nio/Buffer;II)V", (void*) etc1_formatHeader },
1116 { "isValid", "(Ljava/nio/Buffer;)Z", (void*) etc1_isValid },
1117 { "getWidth", "(Ljava/nio/Buffer;)I", (void*) etc1_getWidth },
1118 { "getHeight", "(Ljava/nio/Buffer;)I", (void*) etc1_getHeight },
1121 typedef struct _ClassRegistrationInfo {
1122 const char* classPath;
1123 JNINativeMethod* methods;
1125 } ClassRegistrationInfo;
1127 static ClassRegistrationInfo gClasses[] = {
1128 {"android/opengl/Matrix", gMatrixMethods, NELEM(gMatrixMethods)},
1129 {"android/opengl/Visibility", gVisibilityMethods, NELEM(gVisibilityMethods)},
1130 {"android/opengl/GLUtils", gUtilsMethods, NELEM(gUtilsMethods)},
1131 {"android/opengl/ETC1", gEtc1Methods, NELEM(gEtc1Methods)},
1134 int register_android_opengl_classes(JNIEnv* env)
1136 nativeClassInitBuffer(env);
1138 for (int i = 0; i < NELEM(gClasses); i++) {
1139 ClassRegistrationInfo* cri = &gClasses[i];
1140 result = RegisterMethodsOrDie(env, cri->classPath, cri->methods, cri->methodCount);
1145 } // namespace android