Atlas - SDL_DirectFB_shape.c
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <[email protected]>
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
32SDL_WindowShaper*
33DirectFB_CreateShaper(SDL_Window* window) {
34    SDL_WindowShaper* result = NULL;
35    SDL_ShapeData* data;
36    int resized_properly;
37
38    result = malloc(sizeof(SDL_WindowShaper));
39    result->window = window;
40    result->mode.mode = ShapeModeDefault;
41    result->mode.parameters.binarizationCutoff = 1;
42    result->userx = result->usery = 0;
43    data = SDL_malloc(sizeof(SDL_ShapeData));
44    result->driverdata = data;
45    data->surface = NULL;
46    window->shaper = result;
47    resized_properly = DirectFB_ResizeWindowShape(window);
48    SDL_assert(resized_properly == 0);
49
50    return result;
51}
52
53int
54DirectFB_ResizeWindowShape(SDL_Window* window) {
55    SDL_ShapeData* data = window->shaper->driverdata;
56    SDL_assert(data != NULL);
57
58    if (window->x != -1000)
59    {
60        window->shaper->userx = window->x;
61        window->shaper->usery = window->y;
62    }
63    SDL_SetWindowPosition(window,-1000,-1000);
64
65    return 0;
66}
67
68int
69DirectFB_SetWindowShape(SDL_WindowShaper *shaper,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) {
70
71    if(shaper == NULL || shape == NULL || shaper->driverdata == NULL)
72        return -1;
73    if(shape->format->Amask == 0 && SDL_SHAPEMODEALPHA(shape_mode->mode))
74        return -2;
75    if(shape->w != shaper->window->w || shape->h != shaper->window->h)
76        return -3;
77
78    {
79        SDL_VideoDisplay *display = SDL_GetDisplayForWindow(shaper->window);
80        SDL_DFB_DEVICEDATA(display->device);
81        Uint32 *pixels;
82        Sint32 pitch;
83        Uint32 h,w;
84        Uint8  *src, *bitmap;
85        DFBSurfaceDescription dsc;
86
87        SDL_ShapeData *data = shaper->driverdata;
88
89        SDL_DFB_RELEASE(data->surface);
90
91        dsc.flags = DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT | DSDESC_CAPS;
92        dsc.width = shape->w;
93        dsc.height = shape->h;
94        dsc.caps = DSCAPS_PREMULTIPLIED;
95        dsc.pixelformat = DSPF_ARGB;
96
97        SDL_DFB_CHECKERR(devdata->dfb->CreateSurface(devdata->dfb, &dsc, &data->surface));
98
99        /* Assume that shaper->alphacutoff already has a value, because SDL_SetWindowShape() should have given it one. */
100        SDL_DFB_ALLOC_CLEAR(bitmap, shape->w * shape->h);
101        SDL_CalculateShapeBitmap(shaper->mode,shape,bitmap,1);
102
103        src = bitmap;
104
105        SDL_DFB_CHECK(data->surface->Lock(data->surface, DSLF_WRITE | DSLF_READ, (void **) &pixels, &pitch));
106
107        h = shaper->window->h;
108        while (h--) {
109            for (w = 0; w < shaper->window->w; w++) {
110                if (*src)
111                    pixels[w] = 0xFFFFFFFF;
112                else
113                    pixels[w] = 0;
114                src++;
115
116            }
117            pixels += (pitch >> 2);
118        }
119        SDL_DFB_CHECK(data->surface->Unlock(data->surface));
120        SDL_DFB_FREE(bitmap);
121
122        /* FIXME: Need to call this here - Big ?? */
123        DirectFB_WM_RedrawLayout(SDL_GetDisplayForWindow(shaper->window)->device, shaper->window);
124    }
125
126    return 0;
127error:
128    return -1;
129}
130
131#endif /* SDL_VIDEO_DRIVER_DIRECTFB */
132
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