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#import "DispatchLifeGLView.h"

#import <OpenGL/OpenGL.h>

#include <OpenGL/gl.h>

#include <OpenGL/glext.h>

#include <OpenGL/glu.h>

#include <OpenGL/CGLCurrent.h>

#include <OpenGL/CGLContext.h>

extern size_t grid_x_size;

extern size_t grid_y_size;

@implementation DispatchLifeGLView

#define CELL_WIDTH 8

#define CELL_HEIGHT 8

- (void)goFullScreen:(NSOpenGLView*)view {

    NSOpenGLPixelFormatAttribute attrs[] =

    {

        NSOpenGLPFAFullScreen,

        NSOpenGLPFAScreenMask, CGDisplayIDToOpenGLDisplayMask(kCGDirectMainDisplay),

        NSOpenGLPFAAccelerated,

        NSOpenGLPFANoRecovery,

        NSOpenGLPFADoubleBuffer,

        0

    };

    NSOpenGLPixelFormat* pixFmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];

    NSOpenGLContext* screen = [[NSOpenGLContext alloc] initWithFormat:pixFmt shareContext:[view openGLContext]];

    CGDisplayErr err = CGCaptureAllDisplays();

    if (err != CGDisplayNoErr) {

        [screen release];

        return;

    }

    [screen setFullScreen];

    [screen makeCurrentContext];

    glClearColor(0.0, 0.0, 0.0, 0.0);

    glClear(GL_COLOR_BUFFER_BIT);

    [screen flushBuffer];

    glClear(GL_COLOR_BUFFER_BIT);

    [screen flushBuffer];

}

- (id)initWithFrame:(NSRect)frame {

    NSOpenGLPixelFormatAttribute attrs[] =

    {

        NSOpenGLPFAAccelerated,

        NSOpenGLPFANoRecovery,

        NSOpenGLPFADoubleBuffer,

        0

    };

    NSOpenGLPixelFormat* pixFmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];

    self = [super initWithFrame:frame pixelFormat:pixFmt];

    if (self) {

        [[self openGLContext] makeCurrentContext];

        glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

        glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

        glClearColor(1.0, 1.0, 1.0, 1.0);

        glColor4f(1.0, 1.0, 1.0, 1.0);

        glEnable(GL_RASTER_POSITION_UNCLIPPED_IBM);

        glDisable(GL_DITHER);

        grid_x_size = 128;

        grid_y_size = 96;

        self->grid = init_grid(grid_x_size, grid_y_size);

        size_t image_size = grid_x_size * grid_y_size * sizeof(uint32_t);

        self->image = malloc(image_size);

        memset(self->image, 0xFF, image_size);

        [self adjustGLViewBounds];

        [[NSTimer scheduledTimerWithTimeInterval: (1.0f / 15.0) target: self selector:@selector(drawRect:) userInfo:self repeats:true] retain];

    }

    return self;

}

- (void)drawRect:(NSRect)rect {

    [[self openGLContext] makeCurrentContext];

    glClear(GL_COLOR_BUFFER_BIT);

    NSRect bounds = [self bounds];

    glRasterPos2f(-bounds.size.width/2, -bounds.size.height/2);

    glPixelZoom(bounds.size.width/grid_x_size, bounds.size.height/grid_y_size);

    const int width = grid_x_size;

    const int height = grid_y_size;

    int x, y;

    for (y = 0; y < height; ++y) {

        for (x = 0; x < width; ++x) {

            int i = y * width + x;

            switch (get_grid_display_char(grid, x, y)) {

                case '.':

                    image[i] = 0xCCCCCCFF;

                    break;

                case '#':

                    image[i] = 0x000000FF;

                    break;

                case ' ':

                    image[i] = 0xFFFFFFFF;

                    break;

                default:

                    image[i] = 0x0000FFFF;

                    break;

            }

        }

    }

    glDrawPixels(width, height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8, image);

    glFinish();

    [[self openGLContext] flushBuffer];

}

- (void)adjustGLViewBounds

{

    [[self openGLContext] makeCurrentContext];

    [[self openGLContext] update];

    NSRect rect = [self bounds];

    glViewport(0, 0, (GLint) rect.size.width, (GLint) rect.size.height);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    gluOrtho2D(-(rect.size.width/2), rect.size.width/2, -(rect.size.height/2), rect.size.height/2);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity(); 

    [self setNeedsDisplay:true];

}

- (void)update  // moved or resized

{

    [super update];

    [self adjustGLViewBounds];

}

- (void)reshape // scrolled, moved or resized

{

    [super reshape];

    [self adjustGLViewBounds];

}

@end