Atlas - SDL_cocoashape.m
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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
22#include "../../SDL_internal.h"
23
24#if SDL_VIDEO_DRIVER_COCOA
25
26#include "SDL_cocoavideo.h"
27#include "SDL_shape.h"
28#include "SDL_cocoashape.h"
29#include "../SDL_sysvideo.h"
30#include "SDL_assert.h"
31
32SDL_WindowShaper*
33Cocoa_CreateShaper(SDL_Window* window)
34{
35    SDL_WindowData* windata = (SDL_WindowData*)window->driverdata;
36    [windata->nswindow setOpaque:NO];
37
38    [windata->nswindow setStyleMask:NSWindowStyleMaskBorderless];
39
40    SDL_WindowShaper* result = result = malloc(sizeof(SDL_WindowShaper));
41    result->window = window;
42    result->mode.mode = ShapeModeDefault;
43    result->mode.parameters.binarizationCutoff = 1;
44    result->userx = result->usery = 0;
45    window->shaper = result;
46
47    SDL_ShapeData* data = malloc(sizeof(SDL_ShapeData));
48    result->driverdata = data;
49    data->context = [windata->nswindow graphicsContext];
50    data->saved = SDL_FALSE;
51    data->shape = NULL;
52
53    int resized_properly = Cocoa_ResizeWindowShape(window);
54    SDL_assert(resized_properly == 0);
55    return result;
56}
57
58typedef struct {
59    NSView* view;
60    NSBezierPath* path;
61    SDL_Window* window;
62} SDL_CocoaClosure;
63
64void
65ConvertRects(SDL_ShapeTree* tree, void* closure)
66{
67    SDL_CocoaClosure* data = (SDL_CocoaClosure*)closure;
68    if(tree->kind == OpaqueShape) {
69        NSRect rect = NSMakeRect(tree->data.shape.x,data->window->h - tree->data.shape.y,tree->data.shape.w,tree->data.shape.h);
70        [data->path appendBezierPathWithRect:[data->view convertRect:rect toView:nil]];
71    }
72}
73
74int
75Cocoa_SetWindowShape(SDL_WindowShaper *shaper, SDL_Surface *shape, SDL_WindowShapeMode *shape_mode)
76{ @autoreleasepool
77{
78    SDL_ShapeData* data = (SDL_ShapeData*)shaper->driverdata;
79    SDL_WindowData* windata = (SDL_WindowData*)shaper->window->driverdata;
80    SDL_CocoaClosure closure;
81    if(data->saved == SDL_TRUE) {
82        [data->context restoreGraphicsState];
83        data->saved = SDL_FALSE;
84    }
85
86    /*[data->context saveGraphicsState];*/
87    /*data->saved = SDL_TRUE;*/
88    [NSGraphicsContext setCurrentContext:data->context];
89
90    [[NSColor clearColor] set];
91    NSRectFill([[windata->nswindow contentView] frame]);
92    data->shape = SDL_CalculateShapeTree(*shape_mode,shape);
93
94    closure.view = [windata->nswindow contentView];
95    closure.path = [NSBezierPath bezierPath];
96    closure.window = shaper->window;
97    SDL_TraverseShapeTree(data->shape,&ConvertRects,&closure);
98    [closure.path addClip];
99
100    return 0;
101}}
102
103int
104Cocoa_ResizeWindowShape(SDL_Window *window)
105{
106    SDL_ShapeData* data = window->shaper->driverdata;
107    SDL_assert(data != NULL);
108    return 0;
109}
110
111#endif /* SDL_VIDEO_DRIVER_COCOA */
112
113/* vi: set ts=4 sw=4 expandtab: */
114
[FILE END]
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