Merge change I5ffd6240 into eclair

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_SRC_FILES:= \

	gl_basic.cpp

LOCAL_SHARED_LIBRARIES := \

	libcutils \

    libEGL \

    libGLESv1_CM \

    libui

LOCAL_MODULE:= test-opengl-gl_basic

LOCAL_MODULE_TAGS := optional

include $(BUILD_EXECUTABLE)

// Simple OpenGL ES 1.x application showing how to initialize and draw something.

#include <EGL/egl.h>

#include <GLES/gl.h>

#include <GLES/glext.h>

#include <ui/FramebufferNativeWindow.h>

#include <ui/EGLUtils.h>

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

using namespace android;

EGLDisplay eglDisplay;

EGLSurface eglSurface;

EGLContext eglContext;

GLuint texture;

#define FIXED_ONE 0x10000

#define ITERATIONS 50

int init_gl_surface(void);

void free_gl_surface(void);

void init_scene(void);

void render();

void create_texture(void);

int readTimer(void);

static void gluLookAt(float eyeX, float eyeY, float eyeZ,

        float centerX, float centerY, float centerZ, float upX, float upY,

        float upZ)

{

    // See the OpenGL GLUT documentation for gluLookAt for a description

    // of the algorithm. We implement it in a straightforward way:

    float fx = centerX - eyeX;

    float fy = centerY - eyeY;

    float fz = centerZ - eyeZ;

    // Normalize f

    float rlf = 1.0f / sqrtf(fx*fx + fy*fy + fz*fz);

    fx *= rlf;

    fy *= rlf;

    fz *= rlf;

    // Normalize up

    float rlup = 1.0f / sqrtf(upX*upX + upY*upY + upZ*upZ);

    upX *= rlup;

    upY *= rlup;

    upZ *= rlup;

    // compute s = f x up (x means "cross product")

    float sx = fy * upZ - fz * upY;

    float sy = fz * upX - fx * upZ;

    float sz = fx * upY - fy * upX;

    // compute u = s x f

    float ux = sy * fz - sz * fy;

    float uy = sz * fx - sx * fz;

    float uz = sx * fy - sy * fx;

    float m[16] ;

    m[0] = sx;

    m[1] = ux;

    m[2] = -fx;

    m[3] = 0.0f;

    m[4] = sy;

    m[5] = uy;

    m[6] = -fy;

    m[7] = 0.0f;

    m[8] = sz;

    m[9] = uz;

    m[10] = -fz;

    m[11] = 0.0f;

    m[12] = 0.0f;

    m[13] = 0.0f;

    m[14] = 0.0f;

    m[15] = 1.0f;

    glMultMatrixf(m);

    glTranslatef(-eyeX, -eyeY, -eyeZ);

}

void printEGLConfiguration(EGLDisplay dpy, EGLConfig config) {

#define X(VAL) {VAL, #VAL}

    struct {EGLint attribute; const char* name;} names[] = {

    X(EGL_BUFFER_SIZE),

    X(EGL_ALPHA_SIZE),

    X(EGL_BLUE_SIZE),

    X(EGL_GREEN_SIZE),

    X(EGL_RED_SIZE),

    X(EGL_DEPTH_SIZE),

    X(EGL_STENCIL_SIZE),

    X(EGL_CONFIG_CAVEAT),

    X(EGL_CONFIG_ID),

    X(EGL_LEVEL),

    X(EGL_MAX_PBUFFER_HEIGHT),

    X(EGL_MAX_PBUFFER_PIXELS),

    X(EGL_MAX_PBUFFER_WIDTH),

    X(EGL_NATIVE_RENDERABLE),

    X(EGL_NATIVE_VISUAL_ID),

    X(EGL_NATIVE_VISUAL_TYPE),

    X(EGL_PRESERVED_RESOURCES),

    X(EGL_SAMPLES),

    X(EGL_SAMPLE_BUFFERS),

    X(EGL_SURFACE_TYPE),

    X(EGL_TRANSPARENT_TYPE),

    X(EGL_TRANSPARENT_RED_VALUE),

    X(EGL_TRANSPARENT_GREEN_VALUE),

    X(EGL_TRANSPARENT_BLUE_VALUE),

    X(EGL_BIND_TO_TEXTURE_RGB),

    X(EGL_BIND_TO_TEXTURE_RGBA),

    X(EGL_MIN_SWAP_INTERVAL),

    X(EGL_MAX_SWAP_INTERVAL),

    X(EGL_LUMINANCE_SIZE),

    X(EGL_ALPHA_MASK_SIZE),

    X(EGL_COLOR_BUFFER_TYPE),

    X(EGL_RENDERABLE_TYPE),

    X(EGL_CONFORMANT),

   };

#undef X

    for (size_t j = 0; j < sizeof(names) / sizeof(names[0]); j++) {

        EGLint value = -1;

        EGLint returnVal = eglGetConfigAttrib(dpy, config, names[j].attribute, &value);

        EGLint error = eglGetError();

        if (returnVal && error == EGL_SUCCESS) {

            printf(" %s: ", names[j].name);

            printf("%d (0x%x)", value, value);

        }

    }

    printf("\n");

}

static void checkEglError(const char* op, EGLBoolean returnVal = EGL_TRUE) {

    if (returnVal != EGL_TRUE) {

        fprintf(stderr, "%s() returned %d\n", op, returnVal);

    }

    for (EGLint error = eglGetError(); error != EGL_SUCCESS; error

            = eglGetError()) {

        fprintf(stderr, "after %s() eglError %s (0x%x)\n", op, EGLUtils::strerror(error),

                error);

    }

}

int printEGLConfigurations(EGLDisplay dpy) {

    EGLint numConfig = 0;

    EGLint returnVal = eglGetConfigs(dpy, NULL, 0, &numConfig);

    checkEglError("eglGetConfigs", returnVal);

    if (!returnVal) {

        return false;

    }

    printf("Number of EGL configurations: %d\n", numConfig);

    EGLConfig* configs = (EGLConfig*) malloc(sizeof(EGLConfig) * numConfig);

    if (! configs) {

        printf("Could not allocate configs.\n");

        return false;

    }

    returnVal = eglGetConfigs(dpy, configs, numConfig, &numConfig);

    checkEglError("eglGetConfigs", returnVal);

    if (!returnVal) {

        free(configs);

        return false;

    }

    for(int i = 0; i < numConfig; i++) {

        printf("Configuration %d\n", i);

        printEGLConfiguration(dpy, configs[i]);

    }

    free(configs);

    return true;

}

int main(int argc, char **argv)

{

    int q;

    int start, end;

    printf("Initializing EGL...\n");

    if(!init_gl_surface())

    {

        printf("GL initialisation failed - exiting\n");

        return 0;

    }

    init_scene();

    create_texture();

    printf("Running...\n");

    while(true) {

        render();

    }

    free_gl_surface();

    return 0;

}

int init_gl_surface(void)

{

    EGLint numConfigs = 1;

    EGLConfig myConfig = {0};

    EGLint attrib[] =

    {

            EGL_SURFACE_TYPE, EGL_WINDOW_BIT,

            EGL_NONE

    };

    if ( (eglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY)) == EGL_NO_DISPLAY )

    {

        printf("eglGetDisplay failed\n");

        return 0;

    }

    if ( eglInitialize(eglDisplay, NULL, NULL) != EGL_TRUE )

    {

        printf("eglInitialize failed\n");

        return 0;

    }

    if (! printEGLConfigurations(eglDisplay)) {

        printf("printEGLConfigurations failed.\n");

        return 0;

    }

    EGLNativeWindowType window = android_createDisplaySurface();

    EGLUtils::selectConfigForNativeWindow(eglDisplay, attrib, window, &myConfig);

    if ( (eglSurface = eglCreateWindowSurface(eglDisplay, myConfig,

            window, 0)) == EGL_NO_SURFACE )

    {

        printf("eglCreateWindowSurface failed\n");

        return 0;

    }

    if ( (eglContext = eglCreateContext(eglDisplay, myConfig, 0, 0)) == EGL_NO_CONTEXT )

    {

        printf("eglCreateContext failed\n");

        return 0;

    }

    if ( eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext) != EGL_TRUE )

    {

        printf("eglMakeCurrent failed\n");

        return 0;

    }

    return 1;

}

void free_gl_surface(void)

{

    if (eglDisplay != EGL_NO_DISPLAY)

    {

        eglMakeCurrent( EGL_NO_DISPLAY, EGL_NO_SURFACE,

                EGL_NO_SURFACE, EGL_NO_CONTEXT );

        eglDestroyContext( eglDisplay, eglContext );

        eglDestroySurface( eglDisplay, eglSurface );

        eglTerminate( eglDisplay );

        eglDisplay = EGL_NO_DISPLAY;

    }

}

void init_scene(void)

{

    glDisable(GL_DITHER);

    glEnable(GL_CULL_FACE);

    float ratio = 320.0f / 480.0f;

    glViewport(0, 0, 320, 480);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    glFrustumf(-ratio, ratio, -1, 1, 1, 10);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

    gluLookAt(

            0, 0, 3,  // eye

            0, 0, 0,  // center

            0, 1, 0); // up

    glEnable(GL_TEXTURE_2D);

    glEnableClientState(GL_VERTEX_ARRAY);

    glEnableClientState(GL_TEXTURE_COORD_ARRAY);

}

void create_texture(void)

{

    const unsigned int on = 0xff0000ff;

    const unsigned int off = 0xffffffff;

    const unsigned int pixels[] =

    {

            on, off, on, off, on, off, on, off,

            off, on, off, on, off, on, off, on,

            on, off, on, off, on, off, on, off,

            off, on, off, on, off, on, off, on,

            on, off, on, off, on, off, on, off,

            off, on, off, on, off, on, off, on,

            on, off, on, off, on, off, on, off,

            off, on, off, on, off, on, off, on,

    };

    glGenTextures(1, &texture);

    glBindTexture(GL_TEXTURE_2D, texture);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);

    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

}

void render()

{

    int i, j;

    int quads = 1;

    const GLfloat vertices[] = {

            -1,  -1,  0,

             1,  -1,  0,

             1,   1,  0,

            -1,   1,  0

    };

    const GLfixed texCoords[] = {

            0,            0,

            FIXED_ONE,    0,

            FIXED_ONE,    FIXED_ONE,

            0,            FIXED_ONE

    };

    const GLushort indices[] = { 0, 1, 2,  0, 2, 3 };

    glVertexPointer(3, GL_FLOAT, 0, vertices);

    glTexCoordPointer(2, GL_FIXED, 0, texCoords);

    glClearColor(1.0, 1.0, 1.0, 1.0);

    int nelem = sizeof(indices)/sizeof(indices[0]);

    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);

    glDrawElements(GL_TRIANGLES, nelem, GL_UNSIGNED_SHORT, indices);

    eglSwapBuffers(eglDisplay, eglSurface);

}