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jni stuff

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This commit is contained in:
Hannes Janetzek
2014-05-16 17:45:40 +02:00
parent 6d9b62af72
commit 10e186780c
9 changed files with 121 additions and 65 deletions
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43
jni/gl/utils.c
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@@ -97,6 +97,9 @@ transposeM(float* mTrans, int mTransOffset, float* m, int mOffset);
static inline void
matrix4_proj(float* mat, float* vec);
static inline void
matrix4_proj2D(float* mat, float* vec);
jlong JNI(alloc)(JNIEnv *env, jclass* clazz)
{
return (long) calloc(16, sizeof(float));
@@ -244,12 +247,36 @@ void JNI(strans)(JNIEnv* env, jclass* clazz, jlong ptr_r, jlong ptr_a)
transposeM(matr, 0, mata, 0);
}
void JNI(prj)(JNIEnv* env, jclass* clazz, jlong ptr, jfloatArray obj_vec)
void JNI(prj)(JNIEnv* env, jclass* clazz, jlong ptr, jfloatArray obj_vec){
float* m = CAST(ptr);
float* vec = (float*) (*env)->GetPrimitiveArrayCritical(env, obj_vec, 0);
matrix4_proj(m, vec);
(*env)->ReleasePrimitiveArrayCritical(env, obj_vec, vec, 0);
}
void JNI(prj3D)(JNIEnv* env, jclass* clazz, jlong ptr, jfloatArray obj_vec, int offset, int cnt)
{
float* m = CAST(ptr);
float* vec = (float*) (*env)->GetPrimitiveArrayCritical(env, obj_vec, 0);
matrix4_proj(m, vec);
int length = cnt * 3;
for (int i = offset * 3; i < length; i += 3)
matrix4_proj(m, (vec + i));
(*env)->ReleasePrimitiveArrayCritical(env, obj_vec, vec, 0);
}
void JNI(prj2D)(JNIEnv* env, jclass* clazz, jlong ptr, jfloatArray obj_vec, int offset, int cnt)
{
float* m = CAST(ptr);
float* vec = (float*) (*env)->GetPrimitiveArrayCritical(env, obj_vec, 0);
int length = cnt * 2;
for (int i = offset * 2; i < length; i += 2)
matrix4_proj2D(m, (vec + i));
(*env)->ReleasePrimitiveArrayCritical(env, obj_vec, vec, 0);
}
@@ -490,3 +517,15 @@ matrix4_proj(float* mat, float* vec)
vec[1] = y;
vec[2] = z;
}
static inline void
matrix4_proj2D(float* mat, float* vec)
{
float inv_w = 1.0f / (vec[0] * mat[M30] + vec[1] * mat[M31] + mat[M33]);
float x = (vec[0] * mat[M00] + vec[1] * mat[M01] + mat[M03]) * inv_w;
float y = (vec[0] * mat[M10] + vec[1] * mat[M11] + mat[M13]) * inv_w;
vec[0] = x;
vec[1] = y;
}