/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2011 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#include "SDL_endian.h"
#include "SDL_cocoavideo.h"
#include "SDL_cocoashape.h"
#include "SDL_assert.h"

/* Initialization/Query functions */
static int Cocoa_VideoInit(_THIS);
static void Cocoa_VideoQuit(_THIS);

/* Cocoa driver bootstrap functions */

static int
Cocoa_Available(void)
{
    return (1);
}

static void
Cocoa_DeleteDevice(SDL_VideoDevice * device)
{
    SDL_free(device->driverdata);
    SDL_free(device);
}

static SDL_VideoDevice *
Cocoa_CreateDevice(int devindex)
{
    SDL_VideoDevice *device;
    SDL_VideoData *data;

    Cocoa_RegisterApp();

    /* Initialize all variables that we clean on shutdown */
    device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
    if (device) {
        data = (struct SDL_VideoData *) SDL_calloc(1, sizeof(SDL_VideoData));
    } else {
        data = NULL;
    }
    if (!data) {
        SDL_OutOfMemory();
        if (device) {
            SDL_free(device);
        }
        return NULL;
    }
    device->driverdata = data;

    /* Find out what version of Mac OS X we're running */
    Gestalt(gestaltSystemVersion, &data->osversion);

    /* Set the function pointers */
    device->VideoInit = Cocoa_VideoInit;
    device->VideoQuit = Cocoa_VideoQuit;
    device->GetDisplayBounds = Cocoa_GetDisplayBounds;
    device->GetDisplayModes = Cocoa_GetDisplayModes;
    device->SetDisplayMode = Cocoa_SetDisplayMode;
    device->PumpEvents = Cocoa_PumpEvents;

    device->CreateWindow = Cocoa_CreateWindow;
    device->CreateWindowFrom = Cocoa_CreateWindowFrom;
    device->SetWindowTitle = Cocoa_SetWindowTitle;
    device->SetWindowIcon = Cocoa_SetWindowIcon;
    device->SetWindowPosition = Cocoa_SetWindowPosition;
    device->SetWindowSize = Cocoa_SetWindowSize;
    device->ShowWindow = Cocoa_ShowWindow;
    device->HideWindow = Cocoa_HideWindow;
    device->RaiseWindow = Cocoa_RaiseWindow;
    device->MaximizeWindow = Cocoa_MaximizeWindow;
    device->MinimizeWindow = Cocoa_MinimizeWindow;
    device->RestoreWindow = Cocoa_RestoreWindow;
    device->SetWindowFullscreen = Cocoa_SetWindowFullscreen;
    device->SetWindowGammaRamp = Cocoa_SetWindowGammaRamp;
    device->GetWindowGammaRamp = Cocoa_GetWindowGammaRamp;
    device->SetWindowGrab = Cocoa_SetWindowGrab;
    device->DestroyWindow = Cocoa_DestroyWindow;
    device->GetWindowWMInfo = Cocoa_GetWindowWMInfo;
    
    device->shape_driver.CreateShaper = Cocoa_CreateShaper;
    device->shape_driver.SetWindowShape = Cocoa_SetWindowShape;
    device->shape_driver.ResizeWindowShape = Cocoa_ResizeWindowShape;
    
#if SDL_VIDEO_OPENGL_CGL
    device->GL_LoadLibrary = Cocoa_GL_LoadLibrary;
    device->GL_GetProcAddress = Cocoa_GL_GetProcAddress;
    device->GL_UnloadLibrary = Cocoa_GL_UnloadLibrary;
    device->GL_CreateContext = Cocoa_GL_CreateContext;
    device->GL_MakeCurrent = Cocoa_GL_MakeCurrent;
    device->GL_SetSwapInterval = Cocoa_GL_SetSwapInterval;
    device->GL_GetSwapInterval = Cocoa_GL_GetSwapInterval;
    device->GL_SwapWindow = Cocoa_GL_SwapWindow;
    device->GL_DeleteContext = Cocoa_GL_DeleteContext;
#endif

    device->StartTextInput = Cocoa_StartTextInput;
    device->StopTextInput = Cocoa_StopTextInput;
    device->SetTextInputRect = Cocoa_SetTextInputRect;

    device->SetClipboardText = Cocoa_SetClipboardText;
    device->GetClipboardText = Cocoa_GetClipboardText;
    device->HasClipboardText = Cocoa_HasClipboardText;

    device->free = Cocoa_DeleteDevice;

    return device;
}

VideoBootStrap COCOA_bootstrap = {
    "cocoa", "SDL Cocoa video driver",
    Cocoa_Available, Cocoa_CreateDevice
};


int
Cocoa_VideoInit(_THIS)
{
    Cocoa_InitModes(_this);
    Cocoa_InitKeyboard(_this);
    Cocoa_InitMouse(_this);
    return 0;
}

void
Cocoa_VideoQuit(_THIS)
{
    Cocoa_QuitModes(_this);
    Cocoa_QuitKeyboard(_this);
    Cocoa_QuitMouse(_this);
}

/* This function assumes that it's called from within an autorelease pool */
NSImage *
Cocoa_CreateImage(SDL_Surface * surface)
{
    SDL_Surface *converted;
    NSBitmapImageRep *imgrep;
    Uint8 *pixels;
    int i;
    NSImage *img;

    converted = SDL_ConvertSurfaceFormat(surface, 
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
                                         SDL_PIXELFORMAT_RGBA8888,
#else
                                         SDL_PIXELFORMAT_ABGR8888,
#endif
                                         0);
    if (!converted) {
        return nil;
    }

    imgrep = [[[NSBitmapImageRep alloc] initWithBitmapDataPlanes: NULL
                    pixelsWide: converted->w
                    pixelsHigh: converted->h
                    bitsPerSample: 8
                    samplesPerPixel: 4
                    hasAlpha: YES
                    isPlanar: NO
                    colorSpaceName: NSDeviceRGBColorSpace
                    bytesPerRow: converted->pitch
                    bitsPerPixel: converted->format->BitsPerPixel] autorelease];
    if (imgrep == nil) {
        SDL_FreeSurface(converted);
        return nil;
    }

    /* Copy the pixels */
    pixels = [imgrep bitmapData];
    SDL_memcpy(pixels, converted->pixels, converted->h * converted->pitch);
    SDL_FreeSurface(converted);

    /* Premultiply the alpha channel */
    for (i = (converted->h * converted->w); i--; ) {
        Uint8 alpha = pixels[3];
        pixels[0] = (Uint8)(((Uint16)pixels[0] * alpha) / 255);
        pixels[1] = (Uint8)(((Uint16)pixels[1] * alpha) / 255);
        pixels[2] = (Uint8)(((Uint16)pixels[2] * alpha) / 255);
        pixels += 4;
    }

    img = [[[NSImage alloc] initWithSize: NSMakeSize(surface->w, surface->h)] autorelease];
    if (img != nil) {
        [img addRepresentation: imgrep];
    }
    return img;
}

/*
 * Mac OS X assertion support.
 *
 * This doesn't really have aything to do with the interfaces of the SDL video
 *  subsystem, but we need to stuff this into an Objective-C source code file.
 */

SDL_assert_state
SDL_PromptAssertion_cocoa(const SDL_assert_data *data)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    NSString *msg = [NSString stringWithFormat:
            @"Assertion failure at %s (%s:%d), triggered %u time%s:\n  '%s'",
                data->function, data->filename, data->linenum,
                data->trigger_count, (data->trigger_count == 1) ? "" : "s",
                data->condition];

    NSLog(@"%s", msg);

    /*
     * !!! FIXME: this code needs to deal with fullscreen modes:
     * !!! FIXME:  reset to default desktop, runModal, reset to current?
     */

    NSAlert* alert = [[NSAlert alloc] init];
    [alert setAlertStyle:NSCriticalAlertStyle];
    [alert setMessageText:msg];
    [alert addButtonWithTitle:@"Retry"];
    [alert addButtonWithTitle:@"Break"];
    [alert addButtonWithTitle:@"Abort"];
    [alert addButtonWithTitle:@"Ignore"];
    [alert addButtonWithTitle:@"Always Ignore"];
    const NSInteger clicked = [alert runModal];
    [pool release];
    return (SDL_assert_state) (clicked - NSAlertFirstButtonReturn);
}

/* vim: set ts=4 sw=4 expandtab: */
