/*

Simple DirectMedia Layer

Copyright (C) 2017 BlackBerry Limited

This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any damages

arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not

claim that you wrote the original software. If you use this software

in a product, an acknowledgment in the product documentation would be

appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be

misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

*/

#include "../../SDL_internal.h"

#include "../SDL_sysvideo.h"

#include "sdl_qnx.h"

static screen_context_t context;

static screen_event_t event;

/**

* Initializes the QNX video plugin.

* Creates the Screen context and event handles used for all window operations

* by the plugin.

* @param _THIS

* @return 0 if successful, -1 on error

*/

static int

videoInit(_THIS)

{

SDL_VideoDisplay display;

if (screen_create_context(&context, 0) < 0) {

return -1;

}

if (screen_create_event(&event) < 0) {

return -1;

}

SDL_zero(display);

if (SDL_AddVideoDisplay(&display) < 0) {

return -1;

}

_this->num_displays = 1;

return 0;

}

static void

videoQuit(_THIS)

{

}

/**

* Creates a new native Screen window and associates it with the given SDL

* window.

* @param _THIS

* @param window SDL window to initialize

* @return 0 if successful, -1 on error

*/

static int

createWindow(_THIS, SDL_Window *window)

{

window_impl_t *impl;

int size[2];

int numbufs;

int format;

int usage;

impl = SDL_calloc(1, sizeof(*impl));

if (impl == NULL) {

return -1;

}

// Create a native window.

if (screen_create_window(&impl->window, context) < 0) {

goto fail;

}

// Set the native window's size to match the SDL window.

size[0] = window->w;

size[1] = window->h;

if (screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_SIZE,

size) < 0) {

goto fail;

}

if (screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_SOURCE_SIZE,

size) < 0) {

goto fail;

}

// Create window buffer(s).

if (window->flags & SDL_WINDOW_OPENGL) {

if (glGetConfig(&impl->conf, &format) < 0) {

goto fail;

}

numbufs = 2;

usage = SCREEN_USAGE_OPENGL_ES2;

if (screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_USAGE,

&usage) < 0) {

return -1;

}

} else {

format = SCREEN_FORMAT_RGBX8888;

numbufs = 1;

}

// Set pixel format.

if (screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_FORMAT,

&format) < 0) {

goto fail;

}

// Create buffer(s).

if (screen_create_window_buffers(impl->window, numbufs) < 0) {

goto fail;

}

window->driverdata = impl;

return 0;

fail:

if (impl->window) {

screen_destroy_window(impl->window);

}

SDL_free(impl);

return -1;

}

/**

* Gets a pointer to the Screen buffer associated with the given window. Note

* that the buffer is actually created in createWindow().

* @param _THIS

* @param window SDL window to get the buffer for

* @param[out] pixles Holds a pointer to the window's buffer

* @param[out] format Holds the pixel format for the buffer

* @param[out] pitch Holds the number of bytes per line

* @return 0 if successful, -1 on error

*/

static int

createWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format,

void ** pixels, int *pitch)

{

window_impl_t *impl = (window_impl_t *)window->driverdata;

screen_buffer_t buffer;

// Get a pointer to the buffer's memory.

if (screen_get_window_property_pv(impl->window, SCREEN_PROPERTY_BUFFERS,

(void **)&buffer) < 0) {

return -1;

}

if (screen_get_buffer_property_pv(buffer, SCREEN_PROPERTY_POINTER,

pixels) < 0) {

return -1;

}

// Set format and pitch.

if (screen_get_buffer_property_iv(buffer, SCREEN_PROPERTY_STRIDE,

pitch) < 0) {

return -1;

}

*format = SDL_PIXELFORMAT_RGB888;

return 0;

}

/**

* Informs the window manager that the window needs to be updated.

* @param _THIS

* @param window The window to update

* @param rects An array of reectangular areas to update

* @param numrects Rect array length

* @return 0 if successful, -1 on error

*/

static int

updateWindowFramebuffer(_THIS, SDL_Window *window, const SDL_Rect *rects,

int numrects)

{

window_impl_t *impl = (window_impl_t *)window->driverdata;

screen_buffer_t buffer;

if (screen_get_window_property_pv(impl->window, SCREEN_PROPERTY_BUFFERS,

(void **)&buffer) < 0) {

return -1;

}

screen_post_window(impl->window, buffer, numrects, (int *)rects, 0);

screen_flush_context(context, 0);

return 0;

}

/**

* Runs the main event loop.

* @param _THIS

*/

static void

pumpEvents(_THIS)

{

int type;

for (;;) {

if (screen_get_event(context, event, 0) < 0) {

break;

}

if (screen_get_event_property_iv(event, SCREEN_PROPERTY_TYPE, &type)

< 0) {

break;

}

if (type == SCREEN_EVENT_NONE) {

break;

}

switch (type) {

case SCREEN_EVENT_KEYBOARD:

handleKeyboardEvent(event);

break;

default:

break;

}

}

}

/**

* Updates the size of the native window using the geometry of the SDL window.

* @param _THIS

* @param window SDL window to update

*/

static void

setWindowSize(_THIS, SDL_Window *window)

{

window_impl_t *impl = (window_impl_t *)window->driverdata;

int size[2];

size[0] = window->w;

size[1] = window->h;

screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_SIZE, size);

screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_SOURCE_SIZE,

size);

}

/**

* Makes the native window associated with the given SDL window visible.

* @param _THIS

* @param window SDL window to update

*/

static void

showWindow(_THIS, SDL_Window *window)

{

window_impl_t *impl = (window_impl_t *)window->driverdata;

const int visible = 1;

screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_VISIBLE,

&visible);

}

/**

* Makes the native window associated with the given SDL window invisible.

* @param _THIS

* @param window SDL window to update

*/

static void

hideWindow(_THIS, SDL_Window *window)

{

window_impl_t *impl = (window_impl_t *)window->driverdata;

const int visible = 0;

screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_VISIBLE,

&visible);

}

/**

* Destroys the native window associated with the given SDL window.

* @param _THIS

* @param window SDL window that is being destroyed

*/

static void

destroyWindow(_THIS, SDL_Window *window)

{

window_impl_t *impl = (window_impl_t *)window->driverdata;

if (impl) {

screen_destroy_window(impl->window);

window->driverdata = NULL;

}

}

/**

* Frees the plugin object created by createDevice().

* @param device Plugin object to free

*/

static void

deleteDevice(SDL_VideoDevice *device)

{

SDL_free(device);

}

/**

* Creates the QNX video plugin used by SDL.

* @param devindex Unused

* @return Initialized device if successful, NULL otherwise

*/

static SDL_VideoDevice *

createDevice(int devindex)

{

SDL_VideoDevice *device;

device = (SDL_VideoDevice *)SDL_calloc(1, sizeof(SDL_VideoDevice));

if (device == NULL) {

return NULL;

}

device->driverdata = NULL;

device->VideoInit = videoInit;

device->VideoQuit = videoQuit;

device->CreateWindowFramebuffer = createWindowFramebuffer;

device->UpdateWindowFramebuffer = updateWindowFramebuffer;

device->SetWindowSize = setWindowSize;

device->ShowWindow = showWindow;

device->HideWindow = hideWindow;

device->PumpEvents = pumpEvents;

device->DestroyWindow = destroyWindow;

device->GL_LoadLibrary = glLoadLibrary;

device->GL_GetProcAddress = glGetProcAddress;

device->GL_CreateContext = glCreateContext;

device->GL_SetSwapInterval = glSetSwapInterval;

device->GL_SwapWindow = glSwapWindow;

device->GL_MakeCurrent = glMakeCurrent;

device->GL_DeleteContext = glDeleteContext;

device->GL_UnloadLibrary = glUnloadLibrary;

device->free = deleteDevice;

return device;

}

static int

available()

{

return 1;

}

VideoBootStrap QNX_bootstrap = {

"qnx", "QNX Screen",

available, createDevice

};