SDL  2.0
SDL_windowsshape.c
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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 #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;
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)
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)
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 */
void SDL_FreeShapeTree(SDL_ShapeTree **shape_tree)
Definition: SDL_shape.c:246
SDL_ShapeTree * SDL_CalculateShapeTree(SDL_WindowShapeMode mode, SDL_Surface *shape)
Definition: SDL_shape.c:213
GLuint64EXT * result
int Win32_ResizeWindowShape(SDL_Window *window)
SDL_bool hasshape
Definition: SDL_sysvideo.h:52
A collection of pixels used in software blitting.
Definition: SDL_surface.h:69
A color key is applied.
Definition: SDL_shape.h:88
set set set set set set set macro pixldst1 abits if abits op else op endif endm macro pixldst2 abits if abits op else op endif endm macro pixldst4 abits if abits op else op endif endm macro pixldst0 abits op endm macro pixldst3 mem_operand op endm macro pixldst30 mem_operand op endm macro pixldst abits if abits elseif abits elseif abits elseif abits elseif abits pixldst0 abits else pixldst0 abits pixldst0 abits pixldst0 abits pixldst0 abits endif elseif abits else pixldst0 abits pixldst0 abits endif elseif abits else error unsupported bpp *numpix else pixst endif endm macro pixld1_s mem_operand if asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl elseif asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl else error unsupported endif endm macro pixld2_s mem_operand if mov asr add asl add asl mov asr sub UNIT_X add asl mov asr add asl add asl mov asr add UNIT_X add asl else pixld1_s mem_operand pixld1_s mem_operand endif endm macro pixld0_s mem_operand if asr adds SRC_WIDTH_FIXED bpl add asl elseif asr adds SRC_WIDTH_FIXED bpl add asl endif endm macro pixld_s_internal mem_operand if mem_operand pixld2_s mem_operand pixdeinterleave basereg elseif mem_operand elseif mem_operand elseif mem_operand elseif mem_operand pixld0_s mem_operand else pixld0_s mem_operand pixld0_s mem_operand pixld0_s mem_operand pixld0_s mem_operand endif elseif mem_operand else pixld0_s mem_operand pixld0_s mem_operand endif elseif mem_operand else error unsupported mem_operand if bpp mem_operand endif endm macro vuzp8 reg2 vuzp d d &reg2 endm macro vzip8 reg2 vzip d d &reg2 endm macro pixdeinterleave basereg basereg basereg basereg basereg endif endm macro pixinterleave basereg basereg basereg basereg basereg endif endm macro PF boost_increment endif if endif PF tst PF addne PF subne PF cmp ORIG_W if endif if endif if endif PF subge ORIG_W PF subges if endif if endif if endif endif endm macro cache_preload_simple endif if dst_r_bpp pld [DST_R, #(PREFETCH_DISTANCE_SIMPLE *dst_r_bpp/8)] endif if mask_bpp pld if[MASK, #(PREFETCH_DISTANCE_SIMPLE *mask_bpp/8)] endif endif endm macro fetch_mask_pixblock pixld mask_basereg pixblock_size MASK endm macro ensure_destination_ptr_alignment process_pixblock_tail_head if beq irp local skip1(dst_w_bpp<=(lowbit *8)) &&((lowbit *8)<(pixblock_size *dst_w_bpp)) .if lowbit< 16 tst DST_R
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
SDL_ShapeUnion data
SDL_WindowShaper * Win32_CreateShaper(SDL_Window *window)
#define SDL_INVALID_SHAPE_ARGUMENT
Definition: SDL_shape.h:43
SDL_WindowShapeMode mode
Definition: SDL_sysvideo.h:49
SDL_WindowShaper * shaper
Definition: SDL_sysvideo.h:104
SDL_Window * window
Definition: SDL_sysvideo.h:43
#define TRUE
Definition: edid-parse.c:33
SDL_ShapeTree * mask_tree
The default mode, a binarized alpha cutoff of 1.
Definition: SDL_shape.h:82
SDL_WindowShapeParams parameters
Window-shape parameters.
Definition: SDL_shape.h:105
int x
Definition: SDL_rect.h:66
int w
Definition: SDL_rect.h:67
#define SDL_assert(condition)
Definition: SDL_assert.h:169
#define NULL
Definition: begin_code.h:164
SDL_PixelFormat * format
Definition: SDL_surface.h:72
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
int Win32_SetWindowShape(SDL_WindowShaper *shaper, SDL_Surface *shape, SDL_WindowShapeMode *shape_mode)
int h
Definition: SDL_rect.h:67
The type used to identify a window.
Definition: SDL_sysvideo.h:73
void SDL_TraverseShapeTree(SDL_ShapeTree *tree, SDL_TraversalFunction function, void *closure)
Definition: SDL_shape.c:232
Uint8 binarizationCutoff
A cutoff alpha value for binarization of the window shape&#39;s alpha channel.
Definition: SDL_shape.h:96
#define SDL_malloc
A struct that tags the SDL_WindowShapeParams union with an enum describing the type of its contents...
Definition: SDL_shape.h:101
void * driverdata
Definition: SDL_sysvideo.h:111
SDL_ShapeKind kind
WindowShapeMode mode
The mode of these window-shape parameters.
Definition: SDL_shape.h:103
int y
Definition: SDL_rect.h:66
#define SDL_SetWindowPosition