src/video/directfb/SDL_DirectFB_shape.c
author Sam Lantinga <slouken@libsdl.org>
Wed, 17 Jul 2019 13:01:44 -0700
changeset 12945 36035e851264
parent 12503 806492103856
permissions -rw-r--r--
Added support for the Victrix Pro Fight Stick for PS4
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2019 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_WindowShaper*
    33 DirectFB_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 
    53 int
    54 DirectFB_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 
    68 int
    69 DirectFB_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;
   127 error:
   128     return -1;
   129 }
   130 
   131 #endif /* SDL_VIDEO_DRIVER_DIRECTFB */