305 lines
9.8 KiB
C++
305 lines
9.8 KiB
C++
#include <jni.h>
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#include <JNIHelp.h>
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#include <android_runtime/AndroidRuntime.h>
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#include <utils/misc.h>
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#include <assert.h>
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static int initialized = 0;
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static jclass nioAccessClass;
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static jclass bufferClass;
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static jmethodID getBasePointerID;
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static jmethodID getBaseArrayID;
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static jmethodID getBaseArrayOffsetID;
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static jfieldID positionID;
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static jfieldID limitID;
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static jfieldID elementSizeShiftID;
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/* special calls implemented in Android's GLES wrapper used to more
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* efficiently bound-check passed arrays */
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extern "C" {
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#ifdef GL_VERSION_ES_CM_1_1
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GL_API void GL_APIENTRY glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
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const GLvoid *ptr, GLsizei count);
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GL_API void GL_APIENTRY glNormalPointerBounds(GLenum type, GLsizei stride,
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const GLvoid *pointer, GLsizei count);
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GL_API void GL_APIENTRY glTexCoordPointerBounds(GLint size, GLenum type,
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GLsizei stride, const GLvoid *pointer, GLsizei count);
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GL_API void GL_APIENTRY glVertexPointerBounds(GLint size, GLenum type,
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GLsizei stride, const GLvoid *pointer, GLsizei count);
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GL_API void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
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GLsizei stride, const GLvoid *pointer, GLsizei count);
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GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type,
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GLsizei stride, const GLvoid *pointer, GLsizei count);
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GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type,
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GLsizei stride, const GLvoid *pointer, GLsizei count);
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#endif
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#ifdef GL_ES_VERSION_2_0
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static void glVertexAttribPointerBounds(GLuint indx, GLint size, GLenum type,
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GLboolean normalized, GLsizei stride, const GLvoid *pointer, GLsizei count) {
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glVertexAttribPointer(indx, size, type, normalized, stride, pointer);
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}
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#endif
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#ifdef GL_ES_VERSION_3_0
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static void glVertexAttribIPointerBounds(GLuint indx, GLint size, GLenum type,
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GLsizei stride, const GLvoid *pointer, GLsizei count) {
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glVertexAttribIPointer(indx, size, type, stride, pointer);
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}
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#endif
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}
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/* Cache method IDs each time the class is loaded. */
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static void
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nativeClassInit(JNIEnv *_env, jclass glImplClass)
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{
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jclass nioAccessClassLocal = _env->FindClass("java/nio/NIOAccess");
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nioAccessClass = (jclass) _env->NewGlobalRef(nioAccessClassLocal);
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jclass bufferClassLocal = _env->FindClass("java/nio/Buffer");
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bufferClass = (jclass) _env->NewGlobalRef(bufferClassLocal);
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getBasePointerID = _env->GetStaticMethodID(nioAccessClass,
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"getBasePointer", "(Ljava/nio/Buffer;)J");
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getBaseArrayID = _env->GetStaticMethodID(nioAccessClass,
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"getBaseArray", "(Ljava/nio/Buffer;)Ljava/lang/Object;");
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getBaseArrayOffsetID = _env->GetStaticMethodID(nioAccessClass,
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"getBaseArrayOffset", "(Ljava/nio/Buffer;)I");
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positionID = _env->GetFieldID(bufferClass, "position", "I");
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limitID = _env->GetFieldID(bufferClass, "limit", "I");
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elementSizeShiftID =
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_env->GetFieldID(bufferClass, "_elementSizeShift", "I");
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}
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static void *
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getPointer(JNIEnv *_env, jobject buffer, jarray *array, jint *remaining, jint *offset)
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{
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jint position;
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jint limit;
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jint elementSizeShift;
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jlong pointer;
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position = _env->GetIntField(buffer, positionID);
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limit = _env->GetIntField(buffer, limitID);
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elementSizeShift = _env->GetIntField(buffer, elementSizeShiftID);
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*remaining = (limit - position) << elementSizeShift;
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pointer = _env->CallStaticLongMethod(nioAccessClass,
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getBasePointerID, buffer);
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if (pointer != 0L) {
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*array = NULL;
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return reinterpret_cast<void*>(pointer);
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}
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*array = (jarray) _env->CallStaticObjectMethod(nioAccessClass,
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getBaseArrayID, buffer);
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*offset = _env->CallStaticIntMethod(nioAccessClass,
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getBaseArrayOffsetID, buffer);
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return NULL;
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}
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static void
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releasePointer(JNIEnv *_env, jarray array, void *data, jboolean commit)
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{
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_env->ReleasePrimitiveArrayCritical(array, data,
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commit ? 0 : JNI_ABORT);
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}
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static void *
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getDirectBufferPointer(JNIEnv *_env, jobject buffer) {
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char* buf = (char*) _env->GetDirectBufferAddress(buffer);
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if (buf) {
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jint position = _env->GetIntField(buffer, positionID);
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jint elementSizeShift = _env->GetIntField(buffer, elementSizeShiftID);
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buf += position << elementSizeShift;
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} else {
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jniThrowException(_env, "java/lang/IllegalArgumentException",
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"Must use a native order direct Buffer");
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}
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return (void*) buf;
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}
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// --------------------------------------------------------------------------
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/*
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* returns the number of values glGet returns for a given pname.
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*
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* The code below is written such that pnames requiring only one values
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* are the default (and are not explicitely tested for). This makes the
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* checking code much shorter/readable/efficient.
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*
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* This means that unknown pnames (e.g.: extensions) will default to 1. If
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* that unknown pname needs more than 1 value, then the validation check
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* is incomplete and the app may crash if it passed the wrong number params.
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*/
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static int getNeededCount(GLint pname) {
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int needed = 1;
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#ifdef GL_ES_VERSION_2_0
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// GLES 2.x pnames
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switch (pname) {
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case GL_ALIASED_LINE_WIDTH_RANGE:
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case GL_ALIASED_POINT_SIZE_RANGE:
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needed = 2;
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break;
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case GL_BLEND_COLOR:
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case GL_COLOR_CLEAR_VALUE:
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case GL_COLOR_WRITEMASK:
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case GL_SCISSOR_BOX:
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case GL_VIEWPORT:
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needed = 4;
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break;
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case GL_COMPRESSED_TEXTURE_FORMATS:
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glGetIntegerv(GL_NUM_COMPRESSED_TEXTURE_FORMATS, &needed);
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break;
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case GL_SHADER_BINARY_FORMATS:
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glGetIntegerv(GL_NUM_SHADER_BINARY_FORMATS, &needed);
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break;
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}
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#endif
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#ifdef GL_VERSION_ES_CM_1_1
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// GLES 1.x pnames
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switch (pname) {
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case GL_ALIASED_LINE_WIDTH_RANGE:
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case GL_ALIASED_POINT_SIZE_RANGE:
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case GL_DEPTH_RANGE:
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case GL_SMOOTH_LINE_WIDTH_RANGE:
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case GL_SMOOTH_POINT_SIZE_RANGE:
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needed = 2;
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break;
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case GL_CURRENT_NORMAL:
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case GL_POINT_DISTANCE_ATTENUATION:
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needed = 3;
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break;
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case GL_COLOR_CLEAR_VALUE:
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case GL_COLOR_WRITEMASK:
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case GL_CURRENT_COLOR:
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case GL_CURRENT_TEXTURE_COORDS:
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case GL_FOG_COLOR:
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case GL_LIGHT_MODEL_AMBIENT:
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case GL_SCISSOR_BOX:
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case GL_VIEWPORT:
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needed = 4;
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break;
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case GL_MODELVIEW_MATRIX:
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case GL_PROJECTION_MATRIX:
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case GL_TEXTURE_MATRIX:
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needed = 16;
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break;
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case GL_COMPRESSED_TEXTURE_FORMATS:
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glGetIntegerv(GL_NUM_COMPRESSED_TEXTURE_FORMATS, &needed);
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break;
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}
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#endif
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return needed;
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}
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template <typename JTYPEARRAY, typename CTYPE, void GET(GLenum, CTYPE*)>
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static void
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get
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(JNIEnv *_env, jobject _this, jint pname, JTYPEARRAY params_ref, jint offset) {
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jint _exception = 0;
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const char * _exceptionType;
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const char * _exceptionMessage;
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CTYPE *params_base = (CTYPE *) 0;
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jint _remaining;
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CTYPE *params = (CTYPE *) 0;
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int _needed = 0;
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if (!params_ref) {
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_exception = 1;
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_exceptionType = "java/lang/IllegalArgumentException";
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_exceptionMessage = "params == null";
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goto exit;
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}
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if (offset < 0) {
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_exception = 1;
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_exceptionType = "java/lang/IllegalArgumentException";
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_exceptionMessage = "offset < 0";
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goto exit;
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}
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_remaining = _env->GetArrayLength(params_ref) - offset;
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_needed = getNeededCount(pname);
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// if we didn't find this pname, we just assume the user passed
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// an array of the right size -- this might happen with extensions
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// or if we forget an enum here.
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if (_remaining < _needed) {
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_exception = 1;
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_exceptionType = "java/lang/IllegalArgumentException";
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_exceptionMessage = "length - offset < needed";
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goto exit;
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}
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params_base = (CTYPE *)
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_env->GetPrimitiveArrayCritical(params_ref, (jboolean *)0);
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params = params_base + offset;
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GET(
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(GLenum)pname,
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(CTYPE *)params
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);
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exit:
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if (params_base) {
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_env->ReleasePrimitiveArrayCritical(params_ref, params_base,
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_exception ? JNI_ABORT: 0);
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}
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if (_exception) {
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jniThrowException(_env, _exceptionType, _exceptionMessage);
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}
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}
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template <typename CTYPE, void GET(GLenum, CTYPE*)>
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static void
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getarray
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(JNIEnv *_env, jobject _this, jint pname, jobject params_buf) {
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jint _exception = 0;
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const char * _exceptionType;
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const char * _exceptionMessage;
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jarray _array = (jarray) 0;
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jint _bufferOffset = (jint) 0;
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jint _remaining;
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CTYPE *params = (CTYPE *) 0;
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int _needed = 0;
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params = (CTYPE *)getPointer(_env, params_buf, &_array, &_remaining, &_bufferOffset);
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_remaining /= sizeof(CTYPE); // convert from bytes to item count
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_needed = getNeededCount(pname);
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// if we didn't find this pname, we just assume the user passed
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// an array of the right size -- this might happen with extensions
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// or if we forget an enum here.
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if (_needed>0 && _remaining < _needed) {
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_exception = 1;
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_exceptionType = "java/lang/IllegalArgumentException";
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_exceptionMessage = "remaining() < needed";
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goto exit;
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}
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if (params == NULL) {
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char * _paramsBase = (char *)_env->GetPrimitiveArrayCritical(_array, (jboolean *) 0);
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params = (CTYPE *) (_paramsBase + _bufferOffset);
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}
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GET(
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(GLenum)pname,
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(CTYPE *)params
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);
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exit:
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if (_array) {
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releasePointer(_env, _array, params, _exception ? JNI_FALSE : JNI_TRUE);
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}
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if (_exception) {
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jniThrowException(_env, _exceptionType, _exceptionMessage);
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}
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}
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// --------------------------------------------------------------------------
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