SDL_windowsshape.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_WINDOWS
#include "SDL_assert.h"
#include "SDL_windowsshape.h"
#include "SDL_windowsvideo.h"
SDL_WindowShaper*
Win32_CreateShaper(SDL_Window * window) {
int resized_properly;
SDL_WindowShaper* result = (SDL_WindowShaper *)SDL_malloc(sizeof(SDL_WindowShaper));
result->window = window;
result->mode.mode = ShapeModeDefault;
result->mode.parameters.binarizationCutoff = 1;
result->userx = result->usery = 0;
result->driverdata = (SDL_ShapeData*)SDL_malloc(sizeof(SDL_ShapeData));
((SDL_ShapeData*)result->driverdata)->mask_tree = NULL;
/* Put some driver-data here. */
window->shaper = result;
resized_properly = Win32_ResizeWindowShape(window);
if (resized_properly != 0)
return NULL;
return result;
}
void
CombineRectRegions(SDL_ShapeTree* node,void* closure) {
HRGN mask_region = *((HRGN*)closure),temp_region = NULL;
if(node->kind == OpaqueShape) {
/* Win32 API regions exclude their outline, so we widen the region by one pixel in each direction to include the real outline. */
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);
if(mask_region != NULL) {
CombineRgn(mask_region,mask_region,temp_region,RGN_OR);
DeleteObject(temp_region);
}
else
*((HRGN*)closure) = temp_region;
}
}
int
Win32_SetWindowShape(SDL_WindowShaper *shaper,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) {
SDL_ShapeData *data;
HRGN mask_region = NULL;
if( (shaper == NULL) ||
(shape == NULL) ||
((shape->format->Amask == 0) && (shape_mode->mode != ShapeModeColorKey)) ||
(shape->w != shaper->window->w) ||
(shape->h != shaper->window->h) ) {
return SDL_INVALID_SHAPE_ARGUMENT;
}
data = (SDL_ShapeData*)shaper->driverdata;
if(data->mask_tree != NULL)
SDL_FreeShapeTree(&data->mask_tree);
data->mask_tree = SDL_CalculateShapeTree(*shape_mode,shape);
SDL_TraverseShapeTree(data->mask_tree,&CombineRectRegions,&mask_region);
SDL_assert(mask_region != NULL);
SetWindowRgn(((SDL_WindowData *)(shaper->window->driverdata))->hwnd, mask_region, TRUE);
return 0;
}
int
Win32_ResizeWindowShape(SDL_Window *window) {
SDL_ShapeData* data;
if (window == NULL)
return -1;
data = (SDL_ShapeData *)window->shaper->driverdata;
if (data == NULL)
return -1;
if(data->mask_tree != NULL)
SDL_FreeShapeTree(&data->mask_tree);
if(window->shaper->hasshape == SDL_TRUE) {
window->shaper->userx = window->x;
window->shaper->usery = window->y;
SDL_SetWindowPosition(window,-1000,-1000);
}
return 0;
}
#endif /* SDL_VIDEO_DRIVER_WINDOWS */
SDL_FreeShapeTree
void SDL_FreeShapeTree(SDL_ShapeTree **shape_tree)
Definition: SDL_shape.c:234
SDL_CalculateShapeTree
SDL_ShapeTree * SDL_CalculateShapeTree(SDL_WindowShapeMode mode, SDL_Surface *shape)
Definition: SDL_shape.c:207
result
GLuint64EXT * result
Definition: SDL_opengl_glext.h:9432
Win32_ResizeWindowShape
int Win32_ResizeWindowShape(SDL_Window *window)
SDL_Window::w
int w
Definition: SDL_sysvideo.h:78
SDL_Surface::h
int h
Definition: SDL_surface.h:73
SDL_Window::x
int x
Definition: SDL_sysvideo.h:77
window
SDL_Window * window
Definition: testautomation_render.c:26
SDL_WindowShaper::hasshape
SDL_bool hasshape
Definition: SDL_sysvideo.h:50
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:69
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1967
SDL_WindowShaper::driverdata
void * driverdata
Definition: SDL_sysvideo.h:52
ShapeModeColorKey
A color key is applied.
Definition: SDL_shape.h:87
OpaqueShape
Definition: SDL_shape_internals.h:47
SDL_ShapeTree::data
SDL_ShapeUnion data
Definition: SDL_shape_internals.h:51
Win32_CreateShaper
SDL_WindowShaper * Win32_CreateShaper(SDL_Window *window)
SDL_ShapeData
Definition: SDL_cocoashape.h:32
SDL_Surface::w
int w
Definition: SDL_surface.h:73
SDL_WindowShaper
Definition: SDL_sysvideo.h:38
SDL_WindowData
Definition: SDL_androidwindow.h:34
SDL_INVALID_SHAPE_ARGUMENT
#define SDL_INVALID_SHAPE_ARGUMENT
Definition: SDL_shape.h:43
SDL_WindowShaper::mode
SDL_WindowShapeMode mode
Definition: SDL_sysvideo.h:47
SDL_Window::shaper
SDL_WindowShaper * shaper
Definition: SDL_sysvideo.h:99
SDL_WindowShaper::window
SDL_Window * window
Definition: SDL_sysvideo.h:41
TRUE
#define TRUE
Definition: edid-parse.c:31
SDL_ShapeData::mask_tree
SDL_ShapeTree * mask_tree
Definition: SDL_windowsshape.h:33
ShapeModeDefault
The default mode, a binarized alpha cutoff of 1.
Definition: SDL_shape.h:81
SDL_WindowShapeMode::parameters
SDL_WindowShapeParams parameters
Window-shape parameters.
Definition: SDL_shape.h:104
SDL_Window::y
int y
Definition: SDL_sysvideo.h:77
SDL_Rect::x
int x
Definition: SDL_rect.h:66
SDL_WindowShaper::userx
Uint32 userx
Definition: SDL_sysvideo.h:44
SDL_TRUE
Definition: SDL_stdinc.h:129
SDL_WindowShaper::usery
Uint32 usery
Definition: SDL_sysvideo.h:44
SDL_Rect::w
int w
Definition: SDL_rect.h:67
SDL_Window::h
int h
Definition: SDL_sysvideo.h:78
SDL_assert
#define SDL_assert(condition)
Definition: SDL_assert.h:167
NULL
#define NULL
Definition: begin_code.h:143
SDL_Surface::format
SDL_PixelFormat * format
Definition: SDL_surface.h:72
SDL_ShapeUnion::shape
SDL_Rect shape
Definition: SDL_shape_internals.h:44
Win32_SetWindowShape
int Win32_SetWindowShape(SDL_WindowShaper *shaper, SDL_Surface *shape, SDL_WindowShapeMode *shape_mode)
SDL_Rect::h
int h
Definition: SDL_rect.h:67
SDL_Window
The type used to identify a window.
Definition: SDL_sysvideo.h:71
SDL_TraverseShapeTree
void SDL_TraverseShapeTree(SDL_ShapeTree *tree, SDL_TraversalFunction function, void *closure)
Definition: SDL_shape.c:220
SDL_ShapeTree
Definition: SDL_shape_internals.h:49
SDL_WindowShapeParams::binarizationCutoff
Uint8 binarizationCutoff
a cutoff alpha value for binarization of the window shape&#39;s alpha channel.
Definition: SDL_shape.h:95
SDL_malloc
#define SDL_malloc
Definition: SDL_dynapi_overrides.h:380
SDL_WindowShapeMode
A struct that tags the SDL_WindowShapeParams union with an enum describing the type of its contents...
Definition: SDL_shape.h:100
SDL_PixelFormat::Amask
Uint32 Amask
Definition: SDL_pixels.h:309
SDL_Window::driverdata
void * driverdata
Definition: SDL_sysvideo.h:106
SDL_ShapeTree::kind
SDL_ShapeKind kind
Definition: SDL_shape_internals.h:50
SDL_WindowShapeMode::mode
WindowShapeMode mode
The mode of these window-shape parameters.
Definition: SDL_shape.h:102
SDL_windowsshape.h
SDL_windowsvideo.h
SDL_Rect::y
int y
Definition: SDL_rect.h:66
SDL_SetWindowPosition
#define SDL_SetWindowPosition
Definition: SDL_dynapi_overrides.h:528
SDL_assert.h