Hi, I'm working on a game that uses opengl 1.1. I hope to use opengl to print a texture directly to the screen in 2D. I'm only just getting started. I'm following a blog post at this location:
http://quirkygba.blogspot.com/2010/10/android-native-coding-in-c.html I cannot get it to work, though. Enclosed is a large piece of code that should print something to the screen. Anything would be good. Now it just prints black. If I uncomment the 'glClearColor' and 'glClear' lines I can get a color to the screen, so I know that I can call an opengl command and have it work. It's almost as if 'glDrawTexiOES' doesn't work. I'm using ndk 7b and I've tested on the emulator as well as a 2.2 and 2.3 device. Any help would be appreciated. // Android.mk file //////////////////////// LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := something LOCAL_CFLAGS := -Werror LOCAL_SRC_FILES := something.c LOCAL_LDLIBS := -llog -lGLESv1_CM include $(BUILD_SHARED_LIBRARY) // something.c //////////////////////////////// //some other includes here. #include <GLES/gl.h> #include <GLES/glext.h> #define LOG_TAG "something-jni" #define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__) #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__) #define RGB565(r, g, b) (((r) << (5+6)) | ((g) << 6) | (b)) #define TRUE 1 #define FALSE 0 #define TEX_WIDTH 256 #define TEX_HEIGHT 256 #define TEX_DIMENSION 256 static uint16_t *pixbuf = NULL; static GLuint texture; static int screen_width, screen_height; static void check_gl_error(const char* op) { GLint error; for (error = glGetError(); error; error = glGetError()) LOGE("after %s() glError (0x%x)\n", op, error); } void init(void) { int i; int tex_width, tex_height; tex_width = TEX_WIDTH; tex_height = TEX_HEIGHT; GLint crop[4] = { 0, tex_height, tex_width, - tex_height }; pixbuf = malloc(tex_width * tex_height * 2); for (i = 0; i < TEX_DIMENSION * TEX_DIMENSION ; i ++ ) { pixbuf[i] = 0xffff;//RGB565(0xf,0,0); } glEnable(GL_TEXTURE_2D); glGenTextures(1, &texture); glBindTexture(GL_TEXTURE_2D, texture); glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); check_gl_error("glTexParameteri"); glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); check_gl_error("glTexParameteri"); glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop); check_gl_error("glTexParameteriv"); glShadeModel(GL_FLAT); check_gl_error("glShadeModel"); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tex_width, tex_height, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, pixbuf); check_gl_error("glTexImage2D"); glDisable(GL_BLEND); glDisable(GL_DITHER); glDisable(GL_DEPTH_TEST); glDisable(GL_FOG); glDisable(GL_LIGHTING); glDisable(GL_ALPHA_TEST); glDisable(GL_COLOR_LOGIC_OP); glDisable(GL_COLOR_MATERIAL); glDisable(GL_STENCIL_TEST); glDepthMask(GL_FALSE); check_gl_error("glDepthMask"); glDisable(GL_CULL_FACE); check_gl_error("glDisable"); //glClearColor(1.0f, 0.0f, 0.0f, 0.0f); //glClear(GL_COLOR_BUFFER_BIT); glDrawTexiOES(0, 0, 0, screen_width, screen_height); check_gl_error("glDrawTexiOES"); } // JNI methods for something.c //////////////// JNIEXPORT void JNICALL Java_org_..._Panel_JNIinit(JNIEnv * env, jobject obj, jint w, jint h) { //screen_width = w; //screen_height = h; init(); } // END ///////////////////////// -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
