SDL_windowsshape.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2019 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;
}
static 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_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:1974
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
@ 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
@ 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_TRUE
@ SDL_TRUE
Definition: SDL_stdinc.h:164
SDL_ShapeTree::data
SDL_ShapeUnion data
Definition: SDL_shape_internals.h:51
Win32_CreateShaper
SDL_WindowShaper * Win32_CreateShaper(SDL_Window *window)
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
@ 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