Mercurial > sdl-ios-xcode
view src/video/SDL_shape.c @ 4820:1768f88d5af9
Added Windows build files for testshape.
author | egottlieb |
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date | Sun, 01 Aug 2010 23:26:37 -0400 |
parents | c68e7490e4cf |
children | 55f32099a4b5 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 2010 Eli Gottlieb This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Eli Gottlieb eligottlieb@gmail.com */ #include "SDL_config.h" #include "SDL.h" #include "SDL_video.h" #include "SDL_sysvideo.h" #include "SDL_pixels.h" #include "SDL_surface.h" #include "SDL_shape.h" #include "../src/video/SDL_shape_internals.h" SDL_Window* SDL_CreateShapedWindow(const char *title,unsigned int x,unsigned int y,unsigned int w,unsigned int h,Uint32 flags) { SDL_Window *result = SDL_CreateWindow(title,x,y,w,h,SDL_WINDOW_BORDERLESS | flags & !SDL_WINDOW_FULLSCREEN & !SDL_WINDOW_SHOWN); if(result != NULL) { result->shaper = result->display->device->shape_driver.CreateShaper(result); if(result->shaper != NULL) { result->shaper->usershownflag = flags & SDL_WINDOW_SHOWN; result->shaper->mode.mode = ShapeModeDefault; result->shaper->mode.parameters.binarizationCutoff = 1; result->shaper->hasshape = SDL_FALSE; return result; } else { SDL_DestroyWindow(result); return NULL; } } else return NULL; } SDL_bool SDL_IsShapedWindow(const SDL_Window *window) { if(window == NULL) return SDL_FALSE; else return (SDL_bool)(window->shaper != NULL); } /* REQUIRES that bitmap point to a w-by-h bitmap with ppb pixels-per-byte. */ void SDL_CalculateShapeBitmap(SDL_WindowShapeMode mode,SDL_Surface *shape,Uint8* bitmap,Uint8 ppb) { int x = 0; int y = 0; Uint8 r = 0,g = 0,b = 0,alpha = 0; Uint8* pixel = NULL; Uint32 bitmap_pixel,pixel_value = 0,mask_value = 0; SDL_Color key; if(SDL_MUSTLOCK(shape)) SDL_LockSurface(shape); pixel = (Uint8*)shape->pixels; for(y = 0;y<shape->h;y++) { for(x=0;x<shape->w;x++) { alpha = 0; pixel_value = 0; pixel = (Uint8 *)(shape->pixels) + (y*shape->pitch) + (x*shape->format->BytesPerPixel); switch(shape->format->BytesPerPixel) { case(1): pixel_value = *(Uint8*)pixel; break; case(2): pixel_value = *(Uint16*)pixel; break; case(3): pixel_value = *(Uint32*)pixel & (~shape->format->Amask); break; case(4): pixel_value = *(Uint32*)pixel; break; } SDL_GetRGBA(pixel_value,shape->format,&r,&g,&b,&alpha); bitmap_pixel = y*shape->w + x; switch(mode.mode) { case(ShapeModeDefault): mask_value = (alpha >= 1 ? 1 : 0); break; case(ShapeModeBinarizeAlpha): mask_value = (alpha >= mode.parameters.binarizationCutoff ? 1 : 0); break; case(ShapeModeReverseBinarizeAlpha): mask_value = (alpha <= mode.parameters.binarizationCutoff ? 1 : 0); break; case(ShapeModeColorKey): key = mode.parameters.colorKey; mask_value = ((key.r != r && key.g != g && key.b != b) ? 1 : 0); break; } bitmap[bitmap_pixel / ppb] |= mask_value << (7 - ((ppb - 1) - (bitmap_pixel % ppb))); } } if(SDL_MUSTLOCK(shape)) SDL_UnlockSurface(shape); } SDL_ShapeTree* RecursivelyCalculateShapeTree(SDL_WindowShapeMode mode,SDL_Surface* mask,SDL_bool invert,SDL_Rect dimensions) { int x = 0,y = 0; Uint8* pixel = NULL; Uint32 pixel_value = 0; Uint8 r = 0,g = 0,b = 0,a = 0; SDL_bool pixel_transparent = SDL_FALSE; int last_transparent = -1; SDL_Color key; SDL_ShapeTree* result = (SDL_ShapeTree*)SDL_malloc(sizeof(SDL_ShapeTree)); SDL_Rect next = {0,0,0,0}; for(y=dimensions.y;y<dimensions.h;y++) for(x=dimensions.x;x<dimensions.w;x++) { pixel_value = 0; pixel = (Uint8 *)(mask->pixels) + (y*mask->pitch) + (x*mask->format->BytesPerPixel); switch(mask->format->BytesPerPixel) { case(1): pixel_value = *(Uint8*)pixel; break; case(2): pixel_value = *(Uint16*)pixel; break; case(4): pixel_value = *(Uint32*)pixel; break; } SDL_GetRGBA(pixel_value,mask->format,&r,&g,&b,&a); switch(mode.mode) { case(ShapeModeDefault): pixel_transparent = (SDL_bool)(a >= 1 ? !invert : invert); break; case(ShapeModeBinarizeAlpha): pixel_transparent = (SDL_bool)(a >= mode.parameters.binarizationCutoff ? !invert : invert); break; case(ShapeModeReverseBinarizeAlpha): pixel_transparent = (SDL_bool)(a <= mode.parameters.binarizationCutoff ? !invert : invert); break; case(ShapeModeColorKey): key = mode.parameters.colorKey; pixel_transparent = (SDL_bool)((key.r == r && key.g == g && key.b == b) ? !invert : invert); break; } if(last_transparent == -1) { last_transparent = pixel_transparent; break; } if(last_transparent != pixel_transparent) { result->kind = QuadShape; //These will stay the same. next.w = dimensions.w / 2; next.h = dimensions.h / 2; //These will change from recursion to recursion. next.x = dimensions.x; next.y = dimensions.y; result->data.children.upleft = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,invert,next); next.x = dimensions.w / 2 + 1; //Unneeded: next.y = dimensions.y; result->data.children.upright = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,invert,next); next.x = dimensions.x; next.y = dimensions.h / 2 + 1; result->data.children.downleft = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,invert,next); next.x = dimensions.w / 2 + 1; //Unneeded: next.y = dimensions.h / 2 + 1; result->data.children.downright = (struct SDL_ShapeTree *)RecursivelyCalculateShapeTree(mode,mask,invert,next); return result; } } //If we never recursed, all the pixels in this quadrant have the same "value". result->kind = (last_transparent == SDL_FALSE ? OpaqueShape : TransparentShape); result->data.shape = dimensions; return result; } SDL_ShapeTree* SDL_CalculateShapeTree(SDL_WindowShapeMode mode,SDL_Surface* shape,SDL_bool invert) { SDL_Rect dimensions = {0,0,shape->w,shape->h}; SDL_ShapeTree* result = NULL; if(SDL_MUSTLOCK(shape)) SDL_LockSurface(shape); result = RecursivelyCalculateShapeTree(mode,shape,invert,dimensions); if(SDL_MUSTLOCK(shape)) SDL_UnlockSurface(shape); return result; } void SDL_TraverseShapeTree(SDL_ShapeTree *tree,void(*function)(SDL_ShapeTree*,void*),void* closure) { if(tree->kind == QuadShape) { SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.upleft,function,closure); SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.upright,function,closure); SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.downleft,function,closure); SDL_TraverseShapeTree((SDL_ShapeTree *)tree->data.children.downright,function,closure); } else function(tree,closure); } void SDL_FreeShapeTree(SDL_ShapeTree** shapeTree) { if((*shapeTree)->kind == QuadShape) { SDL_FreeShapeTree((SDL_ShapeTree **)&(*shapeTree)->data.children.upleft); SDL_FreeShapeTree((SDL_ShapeTree **)&(*shapeTree)->data.children.upright); SDL_FreeShapeTree((SDL_ShapeTree **)&(*shapeTree)->data.children.downleft); SDL_FreeShapeTree((SDL_ShapeTree **)&(*shapeTree)->data.children.downright); } SDL_free(*shapeTree); *shapeTree = NULL; } int SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode *shapeMode) { int result; if(window == NULL || !SDL_IsShapedWindow(window)) //The window given was not a shapeable window. return SDL_NONSHAPEABLE_WINDOW; if(shape == NULL) //Invalid shape argument. return SDL_INVALID_SHAPE_ARGUMENT; if(shapeMode != NULL) window->shaper->mode = *shapeMode; //TODO: Platform-specific implementations of SetWindowShape. X11 is finished. Win32 is finished. Debugging is in progress on both. result = window->display->device->shape_driver.SetWindowShape(window->shaper,shape,shapeMode); window->shaper->hasshape = SDL_TRUE; if((window->shaper->usershownflag & SDL_WINDOW_SHOWN) == SDL_WINDOW_SHOWN) { SDL_ShowWindow(window); window->shaper->usershownflag &= !SDL_WINDOW_SHOWN; } return result; } SDL_bool SDL_WindowHasAShape(SDL_Window *window) { if (window == NULL && !SDL_IsShapedWindow(window)) return SDL_FALSE; return window->shaper->hasshape; } int SDL_GetShapedWindowMode(SDL_Window *window,SDL_WindowShapeMode *shapeMode) { if(window != NULL && SDL_IsShapedWindow(window)) { if(shapeMode == NULL) { if(SDL_WindowHasAShape(window)) //The window given has a shape. return 0; else //The window given is shapeable but lacks a shape. return SDL_WINDOW_LACKS_SHAPE; } else { *shapeMode = window->shaper->mode; return 0; } } else //The window given is not a valid shapeable window. return SDL_NONSHAPEABLE_WINDOW; }