/*

Simple DirectMedia Layer

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.

*/

/*

Contributed by Brandon Schaefer, <brandon.schaefer@canonical.com>

*/

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

#if SDL_VIDEO_DRIVER_MIR

#include "SDL_mirevents.h"

#include "SDL_mirframebuffer.h"

#include "SDL_mirwindow.h"

static const Uint32 mir_pixel_format_to_sdl_format[] = {

SDL_PIXELFORMAT_UNKNOWN, /* mir_pixel_format_invalid */

SDL_PIXELFORMAT_ABGR8888, /* mir_pixel_format_abgr_8888 */

SDL_PIXELFORMAT_BGR888, /* mir_pixel_format_xbgr_8888 */

SDL_PIXELFORMAT_ARGB8888, /* mir_pixel_format_argb_8888 */

SDL_PIXELFORMAT_RGB888, /* mir_pixel_format_xrgb_8888 */

SDL_PIXELFORMAT_BGR24 /* mir_pixel_format_bgr_888 */

};

Uint32

MIR_GetSDLPixelFormat(MirPixelFormat format)

{

return mir_pixel_format_to_sdl_format[format];

}

int

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

void** pixels, int* pitch)

{

MIR_Data* mir_data = _this->driverdata;

MIR_Window* mir_window;

MirSurfaceParameters surfaceparm;

if (MIR_CreateWindow(_this, window) < 0)

return SDL_SetError("Failed to created a mir window.");

mir_window = window->driverdata;

mir_surface_get_parameters(mir_window->surface, &surfaceparm);

*format = MIR_GetSDLPixelFormat(surfaceparm.pixel_format);

if (*format == SDL_PIXELFORMAT_UNKNOWN)

return SDL_SetError("Unknown pixel format");

*pitch = (((window->w * SDL_BYTESPERPIXEL(*format)) + 3) & ~3);

*pixels = SDL_malloc(window->h*(*pitch));

if (*pixels == NULL)

return SDL_OutOfMemory();

mir_window->surface = mir_connection_create_surface_sync(mir_data->connection, &surfaceparm);

if (!mir_surface_is_valid(mir_window->surface)) {

const char* error = mir_surface_get_error_message(mir_window->surface);

return SDL_SetError("Failed to created a mir surface: %s", error);

}

return 0;

}

int

MIR_UpdateWindowFramebuffer(_THIS, SDL_Window* window,

const SDL_Rect* rects, int numrects)

{

MIR_Window* mir_window = window->driverdata;

MirGraphicsRegion region;

int i, j, x, y, w, h, start;

int bytes_per_pixel, bytes_per_row, s_stride, d_stride;

mir_surface_get_graphics_region(mir_window->surface, &region);

char* s_dest = region.vaddr;

char* pixels = (char*)window->surface->pixels;

s_stride = window->surface->pitch;

d_stride = region.stride;

bytes_per_pixel = window->surface->format->BytesPerPixel;

for (i = 0; i < numrects; i++) {

s_dest = region.vaddr;

pixels = (char*)window->surface->pixels;

x = rects[i].x;

y = rects[i].y;

w = rects[i].w;

h = rects[i].h;

if (w <= 0 || h <= 0 || (x + w) <= 0 || (y + h) <= 0)

continue;

if (x < 0) {

x += w;

w += rects[i].x;

}

if (y < 0) {

y += h;

h += rects[i].y;

}

if (x + w > window->w)

w = window->w - x;

if (y + h > window->h)

h = window->h - y;

start = y * s_stride + x;

pixels += start;

s_dest += start;

bytes_per_row = bytes_per_pixel * w;

for (j = 0; j < h; j++) {

memcpy(s_dest, pixels, bytes_per_row);

pixels += s_stride;

s_dest += d_stride;

}

}

mir_surface_swap_buffers_sync(mir_window->surface);

return 0;

}

void

MIR_DestroyWindowFramebuffer(_THIS, SDL_Window* window)

{

}

#endif /* SDL_VIDEO_DRIVER_MIR */

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