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103 lines
2.4 KiB
C++
103 lines
2.4 KiB
C++
/*
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* CursorSoftware.cpp, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#include "StdInc.h"
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#include "CursorSoftware.h"
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#include "../render/Colors.h"
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#include "../render/IImage.h"
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#include "../CMT.h"
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#include "SDL_Extensions.h"
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#include <SDL_render.h>
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#include <SDL_events.h>
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void CursorSoftware::render()
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{
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//texture must be updated in the main (renderer) thread, but changes to cursor type may come from other threads
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if (needUpdate)
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updateTexture();
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Point renderPos = pos - pivot;
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SDL_Rect destRect;
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destRect.x = renderPos.x;
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destRect.y = renderPos.y;
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destRect.w = 40;
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destRect.h = 40;
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SDL_RenderCopy(mainRenderer, cursorTexture, nullptr, &destRect);
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}
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void CursorSoftware::createTexture(const Point & dimensions)
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{
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if(cursorTexture)
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SDL_DestroyTexture(cursorTexture);
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if (cursorSurface)
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SDL_FreeSurface(cursorSurface);
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cursorSurface = CSDL_Ext::newSurface(dimensions.x, dimensions.y);
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cursorTexture = SDL_CreateTexture(mainRenderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, dimensions.x, dimensions.y);
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SDL_SetSurfaceBlendMode(cursorSurface, SDL_BLENDMODE_NONE);
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SDL_SetTextureBlendMode(cursorTexture, SDL_BLENDMODE_BLEND);
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}
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void CursorSoftware::updateTexture()
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{
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if (!cursorSurface || Point(cursorSurface->w, cursorSurface->h) != cursorImage->dimensions())
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createTexture(cursorImage->dimensions());
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CSDL_Ext::fillSurface(cursorSurface, Colors::TRANSPARENCY);
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cursorImage->draw(cursorSurface);
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SDL_UpdateTexture(cursorTexture, NULL, cursorSurface->pixels, cursorSurface->pitch);
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needUpdate = false;
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}
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void CursorSoftware::setImage(std::shared_ptr<IImage> image, const Point & pivotOffset)
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{
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assert(image != nullptr);
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cursorImage = image;
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pivot = pivotOffset;
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needUpdate = true;
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}
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void CursorSoftware::setCursorPosition( const Point & newPos )
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{
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pos = newPos;
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}
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void CursorSoftware::setVisible(bool on)
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{
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visible = on;
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}
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CursorSoftware::CursorSoftware():
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cursorTexture(nullptr),
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cursorSurface(nullptr),
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needUpdate(false),
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visible(false),
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pivot(0,0)
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{
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SDL_ShowCursor(SDL_DISABLE);
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}
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CursorSoftware::~CursorSoftware()
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{
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if(cursorTexture)
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SDL_DestroyTexture(cursorTexture);
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if (cursorSurface)
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SDL_FreeSurface(cursorSurface);
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}
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