src/video/directfb/SDL_DirectFB_shape.c
author Sam Lantinga <slouken@libsdl.org>
Sat, 02 Jan 2016 10:10:34 -0800
changeset 9998 f67cf37e9cd4
parent 9619 b94b6d0bff0f
child 10613 ea44906e19b8
permissions -rw-r--r--
Updated copyright to 2016
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 #include "../../SDL_internal.h"
    22 
    23 #if SDL_VIDEO_DRIVER_DIRECTFB
    24 
    25 #include "SDL_assert.h"
    26 #include "SDL_DirectFB_video.h"
    27 #include "SDL_DirectFB_shape.h"
    28 #include "SDL_DirectFB_window.h"
    29 
    30 #include "../SDL_shape_internals.h"
    31 
    32 SDL_Window*
    33 DirectFB_CreateShapedWindow(const char *title,unsigned int x,unsigned int y,unsigned int w,unsigned int h,Uint32 flags) {
    34     return SDL_CreateWindow(title,x,y,w,h,flags /* | SDL_DFB_WINDOW_SHAPED */);
    35 }
    36 
    37 SDL_WindowShaper*
    38 DirectFB_CreateShaper(SDL_Window* window) {
    39     SDL_WindowShaper* result = NULL;
    40 
    41     result = malloc(sizeof(SDL_WindowShaper));
    42     result->window = window;
    43     result->mode.mode = ShapeModeDefault;
    44     result->mode.parameters.binarizationCutoff = 1;
    45     result->userx = result->usery = 0;
    46     SDL_ShapeData* data = SDL_malloc(sizeof(SDL_ShapeData));
    47     result->driverdata = data;
    48     data->surface = NULL;
    49     window->shaper = result;
    50     int resized_properly = DirectFB_ResizeWindowShape(window);
    51     SDL_assert(resized_properly == 0);
    52 
    53     return result;
    54 }
    55 
    56 int
    57 DirectFB_ResizeWindowShape(SDL_Window* window) {
    58     SDL_ShapeData* data = window->shaper->driverdata;
    59     SDL_assert(data != NULL);
    60 
    61     if (window->x != -1000)
    62     {
    63         window->shaper->userx = window->x;
    64         window->shaper->usery = window->y;
    65     }
    66     SDL_SetWindowPosition(window,-1000,-1000);
    67 
    68     return 0;
    69 }
    70 
    71 int
    72 DirectFB_SetWindowShape(SDL_WindowShaper *shaper,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) {
    73 
    74     if(shaper == NULL || shape == NULL || shaper->driverdata == NULL)
    75         return -1;
    76     if(shape->format->Amask == 0 && SDL_SHAPEMODEALPHA(shape_mode->mode))
    77         return -2;
    78     if(shape->w != shaper->window->w || shape->h != shaper->window->h)
    79         return -3;
    80 
    81     {
    82         SDL_VideoDisplay *display = SDL_GetDisplayForWindow(shaper->window);
    83         SDL_DFB_DEVICEDATA(display->device);
    84         Uint32 *pixels;
    85         Sint32 pitch;
    86         Uint32 h,w;
    87         Uint8  *src, *bitmap;
    88         DFBSurfaceDescription dsc;
    89 
    90         SDL_ShapeData *data = shaper->driverdata;
    91 
    92         SDL_DFB_RELEASE(data->surface);
    93 
    94         dsc.flags = DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT | DSDESC_CAPS;
    95         dsc.width = shape->w;
    96         dsc.height = shape->h;
    97         dsc.caps = DSCAPS_PREMULTIPLIED;
    98         dsc.pixelformat = DSPF_ARGB;
    99 
   100         SDL_DFB_CHECKERR(devdata->dfb->CreateSurface(devdata->dfb, &dsc, &data->surface));
   101 
   102         /* Assume that shaper->alphacutoff already has a value, because SDL_SetWindowShape() should have given it one. */
   103         SDL_DFB_ALLOC_CLEAR(bitmap, shape->w * shape->h);
   104         SDL_CalculateShapeBitmap(shaper->mode,shape,bitmap,1);
   105 
   106         src = bitmap;
   107 
   108         SDL_DFB_CHECK(data->surface->Lock(data->surface, DSLF_WRITE | DSLF_READ, (void **) &pixels, &pitch));
   109 
   110         h = shaper->window->h;
   111         while (h--) {
   112             for (w = 0; w < shaper->window->w; w++) {
   113                 if (*src)
   114                     pixels[w] = 0xFFFFFFFF;
   115                 else
   116                     pixels[w] = 0;
   117                 src++;
   118 
   119             }
   120             pixels += (pitch >> 2);
   121         }
   122         SDL_DFB_CHECK(data->surface->Unlock(data->surface));
   123         SDL_DFB_FREE(bitmap);
   124 
   125         /* FIXME: Need to call this here - Big ?? */
   126         DirectFB_WM_RedrawLayout(SDL_GetDisplayForWindow(shaper->window)->device, shaper->window);
   127     }
   128 
   129     return 0;
   130 error:
   131     return -1;
   132 }
   133 
   134 #endif /* SDL_VIDEO_DRIVER_DIRECTFB */