SDL  2.0
SDL_windowsshape.c
Go to the documentation of this file.
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_WINDOWS
24 
25 #include "SDL_assert.h"
26 #include "SDL_windowsshape.h"
27 #include "SDL_windowsvideo.h"
28 
31  int resized_properly;
33  result->window = window;
34  result->mode.mode = ShapeModeDefault;
35  result->mode.parameters.binarizationCutoff = 1;
36  result->userx = result->usery = 0;
37  result->driverdata = (SDL_ShapeData*)SDL_malloc(sizeof(SDL_ShapeData));
38  ((SDL_ShapeData*)result->driverdata)->mask_tree = NULL;
39  /* Put some driver-data here. */
40  window->shaper = result;
41  resized_properly = Win32_ResizeWindowShape(window);
42  if (resized_properly != 0)
43  return NULL;
44 
45  return result;
46 }
47 
48 static void
49 CombineRectRegions(SDL_ShapeTree* node,void* closure) {
50  HRGN mask_region = *((HRGN*)closure),temp_region = NULL;
51  if(node->kind == OpaqueShape) {
52  /* Win32 API regions exclude their outline, so we widen the region by one pixel in each direction to include the real outline. */
53  temp_region = CreateRectRgn(node->data.shape.x,node->data.shape.y,node->data.shape.x + node->data.shape.w + 1,node->data.shape.y + node->data.shape.h + 1);
54  if(mask_region != NULL) {
55  CombineRgn(mask_region,mask_region,temp_region,RGN_OR);
56  DeleteObject(temp_region);
57  }
58  else
59  *((HRGN*)closure) = temp_region;
60  }
61 }
62 
63 int
66  HRGN mask_region = NULL;
67 
68  if( (shaper == NULL) ||
69  (shape == NULL) ||
70  ((shape->format->Amask == 0) && (shape_mode->mode != ShapeModeColorKey)) ||
71  (shape->w != shaper->window->w) ||
72  (shape->h != shaper->window->h) ) {
74  }
75 
76  data = (SDL_ShapeData*)shaper->driverdata;
77  if(data->mask_tree != NULL)
78  SDL_FreeShapeTree(&data->mask_tree);
79  data->mask_tree = SDL_CalculateShapeTree(*shape_mode,shape);
80 
81  SDL_TraverseShapeTree(data->mask_tree,&CombineRectRegions,&mask_region);
82  SDL_assert(mask_region != NULL);
83 
84  SetWindowRgn(((SDL_WindowData *)(shaper->window->driverdata))->hwnd, mask_region, TRUE);
85 
86  return 0;
87 }
88 
89 int
92 
93  if (window == NULL)
94  return -1;
95  data = (SDL_ShapeData *)window->shaper->driverdata;
96  if (data == NULL)
97  return -1;
98 
99  if(data->mask_tree != NULL)
100  SDL_FreeShapeTree(&data->mask_tree);
101  if(window->shaper->hasshape == SDL_TRUE) {
102  window->shaper->userx = window->x;
103  window->shaper->usery = window->y;
104  SDL_SetWindowPosition(window,-1000,-1000);
105  }
106 
107  return 0;
108 }
109 
110 #endif /* SDL_VIDEO_DRIVER_WINDOWS */
SDL_ShapeUnion::shape
SDL_Rect shape
Definition: SDL_shape_internals.h:44
SDL_ShapeTree
Definition: SDL_shape_internals.h:49
SDL_CalculateShapeTree
SDL_ShapeTree * SDL_CalculateShapeTree(SDL_WindowShapeMode mode, SDL_Surface *shape)
Definition: SDL_shape.c:213
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:70
SDL_FreeShapeTree
void SDL_FreeShapeTree(SDL_ShapeTree **shape_tree)
Definition: SDL_shape.c:246
NULL
#define NULL
Definition: begin_code.h:167
TRUE
#define TRUE
Definition: edid-parse.c:33
SDL_ShapeTree::kind
SDL_ShapeKind kind
Definition: SDL_shape_internals.h:50
SDL_Surface::w
int w
Definition: SDL_surface.h:74
SDL_WindowData
Definition: SDL_androidwindow.h:38
SDL_Rect::x
int x
Definition: SDL_rect.h:79
result
GLuint64EXT * result
Definition: SDL_opengl_glext.h:9432
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1973
SDL_Rect::w
int w
Definition: SDL_rect.h:80
SDL_WindowShaper::window
SDL_Window * window
Definition: SDL_sysvideo.h:43
SDL_Window
The type used to identify a window.
Definition: SDL_sysvideo.h:73
SDL_INVALID_SHAPE_ARGUMENT
#define SDL_INVALID_SHAPE_ARGUMENT
Definition: SDL_shape.h:43
SDL_WindowShapeMode
A struct that tags the SDL_WindowShapeParams union with an enum describing the type of its contents.
Definition: SDL_shape.h:101
OpaqueShape
Definition: SDL_shape_internals.h:47
SDL_ShapeData
Definition: SDL_cocoashape.h:32
SDL_WindowShapeMode::mode
WindowShapeMode mode
The mode of these window-shape parameters.
Definition: SDL_shape.h:103
SDL_Window::w
int w
Definition: SDL_sysvideo.h:80
SDL_windowsshape.h
SDL_windowsvideo.h
window
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
SDL_Rect::y
int y
Definition: SDL_rect.h:79
SDL_Rect::h
int h
Definition: SDL_rect.h:80
SDL_assert.h
SDL_PixelFormat::Amask
Uint32 Amask
Definition: SDL_pixels.h:325
ShapeModeColorKey
A color key is applied.
Definition: SDL_shape.h:88
SDL_assert
#define SDL_assert(condition)
Definition: SDL_assert.h:169
Win32_ResizeWindowShape
int Win32_ResizeWindowShape(SDL_Window *window)
SDL_Window::h
int h
Definition: SDL_sysvideo.h:80
SDL_WindowShaper
Definition: SDL_sysvideo.h:40
SDL_Surface::h
int h
Definition: SDL_surface.h:74
SDL_Window::driverdata
void * driverdata
Definition: SDL_sysvideo.h:111
SDL_ShapeTree::data
SDL_ShapeUnion data
Definition: SDL_shape_internals.h:51
Win32_CreateShaper
SDL_WindowShaper * Win32_CreateShaper(SDL_Window *window)
SDL_TRUE
Definition: SDL_stdinc.h:164
SDL_TraverseShapeTree
void SDL_TraverseShapeTree(SDL_ShapeTree *tree, SDL_TraversalFunction function, void *closure)
Definition: SDL_shape.c:232
SDL_malloc
#define SDL_malloc
Definition: SDL_dynapi_overrides.h:374
ShapeModeDefault
The default mode, a binarized alpha cutoff of 1.
Definition: SDL_shape.h:82
Win32_SetWindowShape
int Win32_SetWindowShape(SDL_WindowShaper *shaper, SDL_Surface *shape, SDL_WindowShapeMode *shape_mode)
SDL_WindowShaper::driverdata
void * driverdata
Definition: SDL_sysvideo.h:54
SDL_SetWindowPosition
#define SDL_SetWindowPosition
Definition: SDL_dynapi_overrides.h:524
SDL_Surface::format
SDL_PixelFormat * format
Definition: SDL_surface.h:73