cd5d97b70ea9699b942c2b8dd6782d10549a98e5
[platform/upstream/SDL.git] / src / video / cocoa / SDL_cocoashape.m
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
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
32 SDL_WindowShaper*
33 Cocoa_CreateShaper(SDL_Window* window)
34 {
35     SDL_WindowData* windata = (SDL_WindowData*)window->driverdata;
36     [windata->nswindow setOpaque:NO];
37
38     if ([windata->nswindow respondsToSelector:@selector(setStyleMask:)]) {
39         [windata->nswindow setStyleMask:NSBorderlessWindowMask];
40     }
41
42     SDL_WindowShaper* result = result = malloc(sizeof(SDL_WindowShaper));
43     result->window = window;
44     result->mode.mode = ShapeModeDefault;
45     result->mode.parameters.binarizationCutoff = 1;
46     result->userx = result->usery = 0;
47     window->shaper = result;
48
49     SDL_ShapeData* data = malloc(sizeof(SDL_ShapeData));
50     result->driverdata = data;
51     data->context = [windata->nswindow graphicsContext];
52     data->saved = SDL_FALSE;
53     data->shape = NULL;
54
55     int resized_properly = Cocoa_ResizeWindowShape(window);
56     SDL_assert(resized_properly == 0);
57     return result;
58 }
59
60 typedef struct {
61     NSView* view;
62     NSBezierPath* path;
63     SDL_Window* window;
64 } SDL_CocoaClosure;
65
66 void
67 ConvertRects(SDL_ShapeTree* tree, void* closure)
68 {
69     SDL_CocoaClosure* data = (SDL_CocoaClosure*)closure;
70     if(tree->kind == OpaqueShape) {
71         NSRect rect = NSMakeRect(tree->data.shape.x,data->window->h - tree->data.shape.y,tree->data.shape.w,tree->data.shape.h);
72         [data->path appendBezierPathWithRect:[data->view convertRect:rect toView:nil]];
73     }
74 }
75
76 int
77 Cocoa_SetWindowShape(SDL_WindowShaper *shaper, SDL_Surface *shape, SDL_WindowShapeMode *shape_mode)
78 { @autoreleasepool
79 {
80     SDL_ShapeData* data = (SDL_ShapeData*)shaper->driverdata;
81     SDL_WindowData* windata = (SDL_WindowData*)shaper->window->driverdata;
82     SDL_CocoaClosure closure;
83     if(data->saved == SDL_TRUE) {
84         [data->context restoreGraphicsState];
85         data->saved = SDL_FALSE;
86     }
87
88     /*[data->context saveGraphicsState];*/
89     /*data->saved = SDL_TRUE;*/
90     [NSGraphicsContext setCurrentContext:data->context];
91
92     [[NSColor clearColor] set];
93     NSRectFill([[windata->nswindow contentView] frame]);
94     data->shape = SDL_CalculateShapeTree(*shape_mode,shape);
95
96     closure.view = [windata->nswindow contentView];
97     closure.path = [NSBezierPath bezierPath];
98     closure.window = shaper->window;
99     SDL_TraverseShapeTree(data->shape,&ConvertRects,&closure);
100     [closure.path addClip];
101
102     return 0;
103 }}
104
105 int
106 Cocoa_ResizeWindowShape(SDL_Window *window)
107 {
108     SDL_ShapeData* data = window->shaper->driverdata;
109     SDL_assert(data != NULL);
110     return 0;
111 }
112
113 #endif /* SDL_VIDEO_DRIVER_COCOA */
114
115 /* vi: set ts=4 sw=4 expandtab: */