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SDL_DirectFB_shape.c
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SDL_DirectFB_shape.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2010 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
SDL1.3 DirectFB driver by couriersud@arcor.de
*/
#include "SDL_assert.h"
#include "SDL_DirectFB_video.h"
#include "SDL_DirectFB_shape.h"
#include "SDL_DirectFB_window.h"
#include "../SDL_shape_internals.h"
SDL_Window*
DirectFB_CreateShapedWindow(const char *title,unsigned int x,unsigned int y,unsigned int w,unsigned int h,Uint32 flags) {
return SDL_CreateWindow(title,x,y,w,h,flags /*| SDL_DFB_WINDOW_SHAPED */);
}
SDL_WindowShaper*
DirectFB_CreateShaper(SDL_Window* window) {
SDL_WindowShaper* result = NULL;
result = malloc(sizeof(SDL_WindowShaper));
result->window = window;
result->mode.mode = ShapeModeDefault;
result->mode.parameters.binarizationCutoff = 1;
result->userx = result->usery = 0;
SDL_ShapeData* data = SDL_malloc(sizeof(SDL_ShapeData));
result->driverdata = data;
data->surface = NULL;
window->shaper = result;
int resized_properly = DirectFB_ResizeWindowShape(window);
SDL_assert(resized_properly == 0);
return result;
}
int
DirectFB_ResizeWindowShape(SDL_Window* window) {
SDL_ShapeData* data = window->shaper->driverdata;
SDL_assert(data != NULL);
if (window->x != -1000)
{
window->shaper->userx = window->x;
window->shaper->usery = window->y;
}
SDL_SetWindowPosition(window,-1000,-1000);
return 0;
}
int
DirectFB_SetWindowShape(SDL_WindowShaper *shaper,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) {
if(shaper == NULL || shape == NULL || shaper->driverdata == NULL)
return -1;
if(shape->format->Amask == 0 && SDL_SHAPEMODEALPHA(shape_mode->mode))
return -2;
if(shape->w != shaper->window->w || shape->h != shaper->window->h)
return -3;
{
SDL_VideoDisplay *display = SDL_GetDisplayForWindow(shaper->window);
SDL_DFB_DEVICEDATA(display->device);
Uint32 *pixels;
Sint32 pitch;
Uint32 h,w;
Uint8 *src, *bitmap;
DFBSurfaceDescription dsc;
SDL_ShapeData *data = shaper->driverdata;
SDL_DFB_RELEASE(data->surface);
dsc.flags = DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT | DSDESC_CAPS;
dsc.width = shape->w;
dsc.height = shape->h;
dsc.caps = DSCAPS_PREMULTIPLIED;
dsc.pixelformat = DSPF_ARGB;
SDL_DFB_CHECKERR(devdata->dfb->CreateSurface(devdata->dfb, &dsc, &data->surface));
/* Assume that shaper->alphacutoff already has a value, because SDL_SetWindowShape() should have given it one. */
SDL_DFB_ALLOC_CLEAR(bitmap, shape->w * shape->h);
SDL_CalculateShapeBitmap(shaper->mode,shape,bitmap,1);
src = bitmap;
SDL_DFB_CHECK(data->surface->Lock(data->surface, DSLF_WRITE | DSLF_READ, (void **) &pixels, &pitch));
h = shaper->window->h;
while (h--) {
for (w = 0; w < shaper->window->w; w++) {
if (*src)
pixels[w] = 0xFFFFFFFF;
else
pixels[w] = 0;
src++;
}
pixels += (pitch >> 2);
}
SDL_DFB_CHECK(data->surface->Unlock(data->surface));
SDL_DFB_FREE(bitmap);
/* FIXME: Need to call this here - Big ?? */
DirectFB_WM_RedrawLayout(SDL_GetDisplayForWindow(shaper->window)->device, shaper->window);
}
return 0;
error:
return -1;
}