cscg22-gearboy

CSCG 2022 Challenge 'Gearboy'
git clone https://git.sinitax.com/sinitax/cscg22-gearboy
Log | Files | Refs | sfeed.txt

SDL_x11shape.c (4149B)

      1/*
      2  Simple DirectMedia Layer
      3  Copyright (C) 1997-2014 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_X11
     24
     25#include "SDL_assert.h"
     26#include "SDL_x11video.h"
     27#include "SDL_x11shape.h"
     28#include "SDL_x11window.h"
     29#include "../SDL_shape_internals.h"
     30
     31SDL_Window*
     32X11_CreateShapedWindow(const char *title,unsigned int x,unsigned int y,unsigned int w,unsigned int h,Uint32 flags) {
     33    return SDL_CreateWindow(title,x,y,w,h,flags);
     34}
     35
     36SDL_WindowShaper*
     37X11_CreateShaper(SDL_Window* window) {
     38    SDL_WindowShaper* result = NULL;
     39    SDL_ShapeData* data = NULL;
     40    int resized_properly;
     41
     42#if SDL_VIDEO_DRIVER_X11_XSHAPE
     43    if (SDL_X11_HAVE_XSHAPE) {  /* Make sure X server supports it. */
     44        result = malloc(sizeof(SDL_WindowShaper));
     45        result->window = window;
     46        result->mode.mode = ShapeModeDefault;
     47        result->mode.parameters.binarizationCutoff = 1;
     48        result->userx = result->usery = 0;
     49        data = SDL_malloc(sizeof(SDL_ShapeData));
     50        result->driverdata = data;
     51        data->bitmapsize = 0;
     52        data->bitmap = NULL;
     53        window->shaper = result;
     54        resized_properly = X11_ResizeWindowShape(window);
     55        SDL_assert(resized_properly == 0);
     56    }
     57#endif
     58
     59    return result;
     60}
     61
     62int
     63X11_ResizeWindowShape(SDL_Window* window) {
     64    SDL_ShapeData* data = window->shaper->driverdata;
     65    unsigned int bitmapsize = window->w / 8;
     66    SDL_assert(data != NULL);
     67
     68    if(window->w % 8 > 0)
     69        bitmapsize += 1;
     70    bitmapsize *= window->h;
     71    if(data->bitmapsize != bitmapsize || data->bitmap == NULL) {
     72        data->bitmapsize = bitmapsize;
     73        if(data->bitmap != NULL)
     74            free(data->bitmap);
     75        data->bitmap = malloc(data->bitmapsize);
     76        if(data->bitmap == NULL) {
     77            return SDL_SetError("Could not allocate memory for shaped-window bitmap.");
     78        }
     79    }
     80    memset(data->bitmap,0,data->bitmapsize);
     81
     82    window->shaper->userx = window->x;
     83    window->shaper->usery = window->y;
     84    SDL_SetWindowPosition(window,-1000,-1000);
     85
     86    return 0;
     87}
     88
     89int
     90X11_SetWindowShape(SDL_WindowShaper *shaper,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) {
     91    SDL_ShapeData *data = NULL;
     92    SDL_WindowData *windowdata = NULL;
     93    Pixmap shapemask;
     94    
     95    if(shaper == NULL || shape == NULL || shaper->driverdata == NULL)
     96        return -1;
     97
     98#if SDL_VIDEO_DRIVER_X11_XSHAPE
     99    if(shape->format->Amask == 0 && SDL_SHAPEMODEALPHA(shape_mode->mode))
    100        return -2;
    101    if(shape->w != shaper->window->w || shape->h != shaper->window->h)
    102        return -3;
    103    data = shaper->driverdata;
    104
    105    /* Assume that shaper->alphacutoff already has a value, because SDL_SetWindowShape() should have given it one. */
    106    SDL_CalculateShapeBitmap(shaper->mode,shape,data->bitmap,8);
    107
    108    windowdata = (SDL_WindowData*)(shaper->window->driverdata);
    109    shapemask = X11_XCreateBitmapFromData(windowdata->videodata->display,windowdata->xwindow,data->bitmap,shaper->window->w,shaper->window->h);
    110
    111    X11_XShapeCombineMask(windowdata->videodata->display,windowdata->xwindow, ShapeBounding, 0, 0,shapemask, ShapeSet);
    112    X11_XSync(windowdata->videodata->display,False);
    113
    114    X11_XFreePixmap(windowdata->videodata->display,shapemask);
    115#endif
    116
    117    return 0;
    118}
    119
    120#endif /* SDL_VIDEO_DRIVER_X11 */
    121