SDL  2.0
SDL_cocoashape.m
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 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  [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 
58 typedef struct {
59  NSView* view;
60  NSBezierPath* path;
61  SDL_Window* window;
62 } SDL_CocoaClosure;
63 
64 void
65 ConvertRects(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 
74 int
75 Cocoa_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 
103 int
104 Cocoa_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: */