mirror of
https://github.com/vcmi/vcmi.git
synced 2024-12-24 22:14:36 +02:00
8ea0ecaec1
- added compatibility method to Canvas to allow SDL_Surface access - added drawBorder method to Canvas to replace CSDL_Ext method - added drawColor method to Canvas to replace CSDL_Ext method - minor changes to Tavern and Trade windows to adapt to new API
866 lines
24 KiB
C++
866 lines
24 KiB
C++
/*
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* SDL_Extensions.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 "SDL_Extensions.h"
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#include "SDL_PixelAccess.h"
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#include "../render/Graphics.h"
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#include "../render/Colors.h"
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#include "../CMT.h"
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#include <SDL_render.h>
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Rect CSDL_Ext::fromSDL(const SDL_Rect & rect)
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{
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return Rect(Point(rect.x, rect.y), Point(rect.w, rect.h));
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}
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SDL_Rect CSDL_Ext::toSDL(const Rect & rect)
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{
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SDL_Rect result;
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result.x = rect.x;
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result.y = rect.y;
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result.w = rect.w;
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result.h = rect.h;
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return result;
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}
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ColorRGBA CSDL_Ext::fromSDL(const SDL_Color & color)
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{
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return { color.r, color.g, color.b, color.a };
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}
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SDL_Color CSDL_Ext::toSDL(const ColorRGBA & color)
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{
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SDL_Color result;
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result.r = color.r;
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result.g = color.g;
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result.b = color.b;
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result.a = color.a;
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return result;
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}
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void CSDL_Ext::setColors(SDL_Surface *surface, SDL_Color *colors, int firstcolor, int ncolors)
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{
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SDL_SetPaletteColors(surface->format->palette,colors,firstcolor,ncolors);
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}
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void CSDL_Ext::setAlpha(SDL_Surface * bg, int value)
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{
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SDL_SetSurfaceAlphaMod(bg, value);
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}
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void CSDL_Ext::updateRect(SDL_Surface *surface, const Rect & rect )
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{
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SDL_Rect rectSDL = CSDL_Ext::toSDL(rect);
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if(0 !=SDL_UpdateTexture(screenTexture, &rectSDL, surface->pixels, surface->pitch))
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logGlobal->error("%sSDL_UpdateTexture %s", __FUNCTION__, SDL_GetError());
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SDL_RenderClear(mainRenderer);
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if(0 != SDL_RenderCopy(mainRenderer, screenTexture, NULL, NULL))
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logGlobal->error("%sSDL_RenderCopy %s", __FUNCTION__, SDL_GetError());
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SDL_RenderPresent(mainRenderer);
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}
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SDL_Surface * CSDL_Ext::newSurface(int w, int h)
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{
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return newSurface(w, h, screen);
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}
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SDL_Surface * CSDL_Ext::newSurface(int w, int h, SDL_Surface * mod) //creates new surface, with flags/format same as in surface given
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{
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SDL_Surface * ret = SDL_CreateRGBSurface(0,w,h,mod->format->BitsPerPixel,mod->format->Rmask,mod->format->Gmask,mod->format->Bmask,mod->format->Amask);
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if (mod->format->palette)
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{
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assert(ret->format->palette);
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assert(ret->format->palette->ncolors == mod->format->palette->ncolors);
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memcpy(ret->format->palette->colors, mod->format->palette->colors, mod->format->palette->ncolors * sizeof(SDL_Color));
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}
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return ret;
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}
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SDL_Surface * CSDL_Ext::copySurface(SDL_Surface * mod) //returns copy of given surface
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{
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//return SDL_DisplayFormat(mod);
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return SDL_ConvertSurface(mod, mod->format, mod->flags);
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}
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template<int bpp>
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SDL_Surface * CSDL_Ext::createSurfaceWithBpp(int width, int height)
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{
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uint32_t rMask = 0, gMask = 0, bMask = 0, aMask = 0;
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Channels::px<bpp>::r.set((uint8_t*)&rMask, 255);
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Channels::px<bpp>::g.set((uint8_t*)&gMask, 255);
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Channels::px<bpp>::b.set((uint8_t*)&bMask, 255);
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Channels::px<bpp>::a.set((uint8_t*)&aMask, 255);
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return SDL_CreateRGBSurface(0, width, height, bpp * 8, rMask, gMask, bMask, aMask);
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}
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void CSDL_Ext::blitAt(SDL_Surface * src, int x, int y, SDL_Surface * dst)
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{
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CSDL_Ext::blitSurface(src, dst, Point(x, y));
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}
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void CSDL_Ext::blitAt(SDL_Surface * src, const Rect & pos, SDL_Surface * dst)
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{
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if (src)
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blitAt(src,pos.x,pos.y,dst);
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}
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// Vertical flip
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SDL_Surface * CSDL_Ext::verticalFlip(SDL_Surface * toRot)
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{
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SDL_Surface * ret = SDL_ConvertSurface(toRot, toRot->format, toRot->flags);
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SDL_LockSurface(ret);
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SDL_LockSurface(toRot);
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const int bpp = ret->format->BytesPerPixel;
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char * src = reinterpret_cast<char *>(toRot->pixels);
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char * dst = reinterpret_cast<char *>(ret->pixels);
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for(int i=0; i<ret->h; i++)
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{
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//FIXME: optimization bugged
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// if (bpp == 1)
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// {
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// // much faster for 8-bit surfaces (majority of our data)
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// std::reverse_copy(src, src + toRot->pitch, dst);
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// }
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// else
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// {
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char * srcPxl = src;
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char * dstPxl = dst + ret->w * bpp;
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for(int j=0; j<ret->w; j++)
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{
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dstPxl -= bpp;
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std::copy(srcPxl, srcPxl + bpp, dstPxl);
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srcPxl += bpp;
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}
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// }
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src += toRot->pitch;
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dst += ret->pitch;
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}
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SDL_UnlockSurface(ret);
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SDL_UnlockSurface(toRot);
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return ret;
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}
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// Horizontal flip
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SDL_Surface * CSDL_Ext::horizontalFlip(SDL_Surface * toRot)
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{
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SDL_Surface * ret = SDL_ConvertSurface(toRot, toRot->format, toRot->flags);
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SDL_LockSurface(ret);
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SDL_LockSurface(toRot);
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char * src = reinterpret_cast<char *>(toRot->pixels);
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char * dst = reinterpret_cast<char *>(ret->pixels) + ret->h * ret->pitch;
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for(int i=0; i<ret->h; i++)
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{
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dst -= ret->pitch;
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std::copy(src, src + toRot->pitch, dst);
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src += toRot->pitch;
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}
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SDL_UnlockSurface(ret);
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SDL_UnlockSurface(toRot);
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return ret;
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}
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uint32_t CSDL_Ext::getPixel(SDL_Surface *surface, const int & x, const int & y, bool colorByte)
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{
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int bpp = surface->format->BytesPerPixel;
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/* Here p is the address to the pixel we want to retrieve */
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uint8_t *p = (uint8_t *)surface->pixels + y * surface->pitch + x * bpp;
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switch(bpp)
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{
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case 1:
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if(colorByte)
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return colorTouint32_t(surface->format->palette->colors+(*p));
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else
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return *p;
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case 2:
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return *(uint16_t *)p;
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case 3:
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return p[0] | p[1] << 8 | p[2] << 16;
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case 4:
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return *(uint32_t *)p;
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default:
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return 0; // shouldn't happen, but avoids warnings
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}
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}
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template<int bpp>
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int CSDL_Ext::blit8bppAlphaTo24bppT(const SDL_Surface * src, const Rect & srcRectInput, SDL_Surface * dst, const Point & dstPointInput)
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{
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SDL_Rect srcRectInstance = CSDL_Ext::toSDL(srcRectInput);
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SDL_Rect dstRectInstance = CSDL_Ext::toSDL(Rect(dstPointInput, srcRectInput.dimensions()));
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SDL_Rect * srcRect =&srcRectInstance;
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SDL_Rect * dstRect =&dstRectInstance;
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/* Make sure the surfaces aren't locked */
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if ( ! src || ! dst )
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{
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SDL_SetError("SDL_UpperBlit: passed a nullptr surface");
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return -1;
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}
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if ( src->locked || dst->locked )
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{
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SDL_SetError("Surfaces must not be locked during blit");
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return -1;
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}
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if (src->format->BytesPerPixel==1 && (bpp==3 || bpp==4 || bpp==2)) //everything's ok
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{
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SDL_Rect fulldst;
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int srcx, srcy, w, h;
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/* If the destination rectangle is nullptr, use the entire dest surface */
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if ( dstRect == nullptr )
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{
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fulldst.x = fulldst.y = 0;
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dstRect = &fulldst;
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}
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/* clip the source rectangle to the source surface */
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if(srcRect)
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{
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int maxw, maxh;
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srcx = srcRect->x;
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w = srcRect->w;
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if(srcx < 0)
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{
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w += srcx;
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dstRect->x -= srcx;
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srcx = 0;
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}
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maxw = src->w - srcx;
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if(maxw < w)
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w = maxw;
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srcy = srcRect->y;
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h = srcRect->h;
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if(srcy < 0)
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{
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h += srcy;
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dstRect->y -= srcy;
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srcy = 0;
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}
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maxh = src->h - srcy;
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if(maxh < h)
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h = maxh;
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}
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else
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{
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srcx = srcy = 0;
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w = src->w;
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h = src->h;
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}
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/* clip the destination rectangle against the clip rectangle */
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{
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SDL_Rect *clip = &dst->clip_rect;
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int dx, dy;
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dx = clip->x - dstRect->x;
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if(dx > 0)
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{
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w -= dx;
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dstRect->x += dx;
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srcx += dx;
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}
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dx = dstRect->x + w - clip->x - clip->w;
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if(dx > 0)
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w -= dx;
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dy = clip->y - dstRect->y;
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if(dy > 0)
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{
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h -= dy;
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dstRect->y += dy;
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srcy += dy;
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}
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dy = dstRect->y + h - clip->y - clip->h;
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if(dy > 0)
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h -= dy;
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}
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if(w > 0 && h > 0)
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{
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dstRect->w = w;
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dstRect->h = h;
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if(SDL_LockSurface(dst))
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return -1; //if we cannot lock the surface
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const SDL_Color *colors = src->format->palette->colors;
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uint8_t *colory = (uint8_t*)src->pixels + srcy*src->pitch + srcx;
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uint8_t *py = (uint8_t*)dst->pixels + dstRect->y*dst->pitch + dstRect->x*bpp;
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for(int y=h; y; y--, colory+=src->pitch, py+=dst->pitch)
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{
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uint8_t *color = colory;
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uint8_t *p = py;
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for(int x = w; x; x--)
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{
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const SDL_Color &tbc = colors[*color++]; //color to blit
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ColorPutter<bpp, +1>::PutColorAlphaSwitch(p, tbc.r, tbc.g, tbc.b, tbc.a);
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}
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}
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SDL_UnlockSurface(dst);
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}
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}
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return 0;
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}
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int CSDL_Ext::blit8bppAlphaTo24bpp(const SDL_Surface * src, const Rect & srcRect, SDL_Surface * dst, const Point & dstPoint)
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{
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switch(dst->format->BytesPerPixel)
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{
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case 2: return blit8bppAlphaTo24bppT<2>(src, srcRect, dst, dstPoint);
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case 3: return blit8bppAlphaTo24bppT<3>(src, srcRect, dst, dstPoint);
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case 4: return blit8bppAlphaTo24bppT<4>(src, srcRect, dst, dstPoint);
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default:
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logGlobal->error("%d bpp is not supported!", (int)dst->format->BitsPerPixel);
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return -1;
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}
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}
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uint32_t CSDL_Ext::colorTouint32_t(const SDL_Color * color)
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{
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uint32_t ret = 0;
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ret+=color->a;
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ret<<=8; //*=256
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ret+=color->b;
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ret<<=8; //*=256
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ret+=color->g;
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ret<<=8; //*=256
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ret+=color->r;
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return ret;
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}
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static void drawLineXDashed(SDL_Surface * sur, int x1, int y1, int x2, int y2, const SDL_Color & color)
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{
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double length(x2 - x1);
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for(int x = x1; x <= x2; x++)
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{
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double f = (x - x1) / length;
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int y = vstd::lerp(y1, y2, f);
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if (std::abs(x - x1) % 5 != 4)
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CSDL_Ext::putPixelWithoutRefreshIfInSurf(sur, x, y, color.r, color.g, color.b);
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}
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}
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static void drawLineYDashed(SDL_Surface * sur, int x1, int y1, int x2, int y2, const SDL_Color & color)
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{
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double length(y2 - y1);
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for(int y = y1; y <= y2; y++)
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{
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double f = (y - y1) / length;
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int x = vstd::lerp(x1, x2, f);
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if (std::abs(y - y1) % 5 != 4)
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CSDL_Ext::putPixelWithoutRefreshIfInSurf(sur, x, y, color.r, color.g, color.b);
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}
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}
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static void drawLineX(SDL_Surface * sur, int x1, int y1, int x2, int y2, const SDL_Color & color1, const SDL_Color & color2)
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{
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double length(x2 - x1);
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for(int x = x1; x <= x2; x++)
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{
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double f = (x - x1) / length;
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int y = vstd::lerp(y1, y2, f);
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uint8_t r = vstd::lerp(color1.r, color2.r, f);
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uint8_t g = vstd::lerp(color1.g, color2.g, f);
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uint8_t b = vstd::lerp(color1.b, color2.b, f);
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uint8_t a = vstd::lerp(color1.a, color2.a, f);
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uint8_t *p = CSDL_Ext::getPxPtr(sur, x, y);
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ColorPutter<4, 0>::PutColor(p, r,g,b,a);
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}
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}
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static void drawLineY(SDL_Surface * sur, int x1, int y1, int x2, int y2, const SDL_Color & color1, const SDL_Color & color2)
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{
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double length(y2 - y1);
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for(int y = y1; y <= y2; y++)
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{
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double f = (y - y1) / length;
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int x = vstd::lerp(x1, x2, f);
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uint8_t r = vstd::lerp(color1.r, color2.r, f);
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uint8_t g = vstd::lerp(color1.g, color2.g, f);
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uint8_t b = vstd::lerp(color1.b, color2.b, f);
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uint8_t a = vstd::lerp(color1.a, color2.a, f);
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uint8_t *p = CSDL_Ext::getPxPtr(sur, x, y);
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ColorPutter<4, 0>::PutColor(p, r,g,b,a);
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}
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}
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void CSDL_Ext::drawLine(SDL_Surface * sur, const Point & from, const Point & dest, const SDL_Color & color1, const SDL_Color & color2)
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{
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//FIXME: duplicated code with drawLineDashed
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int width = std::abs(from.x - dest.x);
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int height = std::abs(from.y - dest.y);
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if ( width == 0 && height == 0)
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{
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uint8_t *p = CSDL_Ext::getPxPtr(sur, from.x, from.y);
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ColorPutter<4, 0>::PutColorAlpha(p, color1);
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return;
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}
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if (width > height)
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{
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if ( from.x < dest.x)
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drawLineX(sur, from.x, from.y, dest.x, dest.y, color1, color2);
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else
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drawLineX(sur, dest.x, dest.y, from.x, from.y, color2, color1);
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}
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else
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{
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if ( from.y < dest.y)
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drawLineY(sur, from.x, from.y, dest.x, dest.y, color1, color2);
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else
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drawLineY(sur, dest.x, dest.y, from.x, from.y, color2, color1);
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}
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}
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void CSDL_Ext::drawLineDashed(SDL_Surface * sur, const Point & from, const Point & dest, const SDL_Color & color)
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{
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//FIXME: duplicated code with drawLine
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int width = std::abs(from.x - dest.x);
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int height = std::abs(from.y - dest.y);
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if ( width == 0 && height == 0)
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{
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CSDL_Ext::putPixelWithoutRefreshIfInSurf(sur, from.x, from.y, color.r, color.g, color.b);
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return;
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}
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if (width > height)
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{
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if ( from.x < dest.x)
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drawLineXDashed(sur, from.x, from.y, dest.x, dest.y, color);
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else
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drawLineXDashed(sur, dest.x, dest.y, from.x, from.y, color);
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}
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else
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{
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if ( from.y < dest.y)
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drawLineYDashed(sur, from.x, from.y, dest.x, dest.y, color);
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else
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drawLineYDashed(sur, dest.x, dest.y, from.x, from.y, color);
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}
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}
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void CSDL_Ext::drawBorder(SDL_Surface * sur, int x, int y, int w, int h, const SDL_Color &color, int depth)
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{
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depth = std::max(1, depth);
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for(int depthIterator = 0; depthIterator < depth; depthIterator++)
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{
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for(int i = 0; i < w; i++)
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{
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CSDL_Ext::putPixelWithoutRefreshIfInSurf(sur,x+i,y+depthIterator,color.r,color.g,color.b);
|
|
CSDL_Ext::putPixelWithoutRefreshIfInSurf(sur,x+i,y+h-1-depthIterator,color.r,color.g,color.b);
|
|
}
|
|
for(int i = 0; i < h; i++)
|
|
{
|
|
CSDL_Ext::putPixelWithoutRefreshIfInSurf(sur,x+depthIterator,y+i,color.r,color.g,color.b);
|
|
CSDL_Ext::putPixelWithoutRefreshIfInSurf(sur,x+w-1-depthIterator,y+i,color.r,color.g,color.b);
|
|
}
|
|
}
|
|
}
|
|
|
|
void CSDL_Ext::drawBorder( SDL_Surface * sur, const Rect &r, const SDL_Color &color, int depth)
|
|
{
|
|
drawBorder(sur, r.x, r.y, r.w, r.h, color, depth);
|
|
}
|
|
|
|
void CSDL_Ext::setPlayerColor(SDL_Surface * sur, PlayerColor player)
|
|
{
|
|
if(player==PlayerColor::UNFLAGGABLE)
|
|
return;
|
|
if(sur->format->BitsPerPixel==8)
|
|
{
|
|
SDL_Color *color = (player == PlayerColor::NEUTRAL
|
|
? graphics->neutralColor
|
|
: &graphics->playerColors[player.getNum()]);
|
|
CSDL_Ext::setColors(sur, color, 5, 1);
|
|
}
|
|
else
|
|
logGlobal->warn("Warning, setPlayerColor called on not 8bpp surface!");
|
|
}
|
|
|
|
CSDL_Ext::TColorPutter CSDL_Ext::getPutterFor(SDL_Surface * const &dest, int incrementing)
|
|
{
|
|
#define CASE_BPP(BytesPerPixel) \
|
|
case BytesPerPixel: \
|
|
if(incrementing > 0) \
|
|
return ColorPutter<BytesPerPixel, 1>::PutColor; \
|
|
else if(incrementing == 0) \
|
|
return ColorPutter<BytesPerPixel, 0>::PutColor; \
|
|
else \
|
|
return ColorPutter<BytesPerPixel, -1>::PutColor;\
|
|
break;
|
|
|
|
switch(dest->format->BytesPerPixel)
|
|
{
|
|
CASE_BPP(2)
|
|
CASE_BPP(3)
|
|
CASE_BPP(4)
|
|
default:
|
|
logGlobal->error("%d bpp is not supported!", (int)dest->format->BitsPerPixel);
|
|
return nullptr;
|
|
}
|
|
|
|
}
|
|
|
|
CSDL_Ext::TColorPutterAlpha CSDL_Ext::getPutterAlphaFor(SDL_Surface * const &dest, int incrementing)
|
|
{
|
|
switch(dest->format->BytesPerPixel)
|
|
{
|
|
CASE_BPP(2)
|
|
CASE_BPP(3)
|
|
CASE_BPP(4)
|
|
default:
|
|
logGlobal->error("%d bpp is not supported!", (int)dest->format->BitsPerPixel);
|
|
return nullptr;
|
|
}
|
|
#undef CASE_BPP
|
|
}
|
|
|
|
uint8_t * CSDL_Ext::getPxPtr(const SDL_Surface * const &srf, const int x, const int y)
|
|
{
|
|
return (uint8_t *)srf->pixels + y * srf->pitch + x * srf->format->BytesPerPixel;
|
|
}
|
|
|
|
bool CSDL_Ext::isTransparent( SDL_Surface * srf, const Point & position )
|
|
{
|
|
return isTransparent(srf, position.x, position.y);
|
|
}
|
|
|
|
bool CSDL_Ext::isTransparent( SDL_Surface * srf, int x, int y )
|
|
{
|
|
if (x < 0 || y < 0 || x >= srf->w || y >= srf->h)
|
|
return true;
|
|
|
|
SDL_Color color;
|
|
|
|
SDL_GetRGBA(CSDL_Ext::getPixel(srf, x, y), srf->format, &color.r, &color.g, &color.b, &color.a);
|
|
|
|
bool pixelTransparent = color.a < 128;
|
|
bool pixelCyan = (color.r == 0 && color.g == 255 && color.b == 255);
|
|
|
|
return pixelTransparent || pixelCyan;
|
|
}
|
|
|
|
void CSDL_Ext::VflipSurf(SDL_Surface * surf)
|
|
{
|
|
char buf[4]; //buffer
|
|
int bpp = surf->format->BytesPerPixel;
|
|
for (int y=0; y<surf->h; ++y)
|
|
{
|
|
char * base = (char*)surf->pixels + y * surf->pitch;
|
|
for (int x=0; x<surf->w/2; ++x)
|
|
{
|
|
memcpy(buf, base + x * bpp, bpp);
|
|
memcpy(base + x * bpp, base + (surf->w - x - 1) * bpp, bpp);
|
|
memcpy(base + (surf->w - x - 1) * bpp, buf, bpp);
|
|
}
|
|
}
|
|
}
|
|
|
|
void CSDL_Ext::putPixelWithoutRefresh(SDL_Surface *ekran, const int & x, const int & y, const uint8_t & R, const uint8_t & G, const uint8_t & B, uint8_t A)
|
|
{
|
|
uint8_t *p = getPxPtr(ekran, x, y);
|
|
getPutterFor(ekran, false)(p, R, G, B);
|
|
|
|
switch(ekran->format->BytesPerPixel)
|
|
{
|
|
case 2: Channels::px<2>::a.set(p, A); break;
|
|
case 3: Channels::px<3>::a.set(p, A); break;
|
|
case 4: Channels::px<4>::a.set(p, A); break;
|
|
}
|
|
}
|
|
|
|
void CSDL_Ext::putPixelWithoutRefreshIfInSurf(SDL_Surface *ekran, const int & x, const int & y, const uint8_t & R, const uint8_t & G, const uint8_t & B, uint8_t A)
|
|
{
|
|
const SDL_Rect & rect = ekran->clip_rect;
|
|
|
|
if(x >= rect.x && x < rect.w + rect.x
|
|
&& y >= rect.y && y < rect.h + rect.y)
|
|
CSDL_Ext::putPixelWithoutRefresh(ekran, x, y, R, G, B, A);
|
|
}
|
|
|
|
template<int bpp>
|
|
void CSDL_Ext::convertToGrayscaleBpp(SDL_Surface * surf, const Rect & rect )
|
|
{
|
|
uint8_t * pixels = static_cast<uint8_t*>(surf->pixels);
|
|
|
|
for(int yp = rect.top(); yp < rect.bottom(); ++yp)
|
|
{
|
|
uint8_t * pixel_from = pixels + yp * surf->pitch + rect.left() * surf->format->BytesPerPixel;
|
|
uint8_t * pixel_dest = pixels + yp * surf->pitch + rect.right() * surf->format->BytesPerPixel;
|
|
|
|
for (uint8_t * pixel = pixel_from; pixel < pixel_dest; pixel += surf->format->BytesPerPixel)
|
|
{
|
|
int r = Channels::px<bpp>::r.get(pixel);
|
|
int g = Channels::px<bpp>::g.get(pixel);
|
|
int b = Channels::px<bpp>::b.get(pixel);
|
|
|
|
int gray = static_cast<int>(0.299 * r + 0.587 * g + 0.114 *b);
|
|
|
|
Channels::px<bpp>::r.set(pixel, gray);
|
|
Channels::px<bpp>::g.set(pixel, gray);
|
|
Channels::px<bpp>::b.set(pixel, gray);
|
|
}
|
|
}
|
|
}
|
|
|
|
void CSDL_Ext::convertToGrayscale( SDL_Surface * surf, const Rect & rect )
|
|
{
|
|
switch(surf->format->BytesPerPixel)
|
|
{
|
|
case 2: convertToGrayscaleBpp<2>(surf, rect); break;
|
|
case 3: convertToGrayscaleBpp<3>(surf, rect); break;
|
|
case 4: convertToGrayscaleBpp<4>(surf, rect); break;
|
|
}
|
|
}
|
|
|
|
template<int bpp>
|
|
void scaleSurfaceFastInternal(SDL_Surface *surf, SDL_Surface *ret)
|
|
{
|
|
const float factorX = float(surf->w) / float(ret->w),
|
|
factorY = float(surf->h) / float(ret->h);
|
|
|
|
for(int y = 0; y < ret->h; y++)
|
|
{
|
|
for(int x = 0; x < ret->w; x++)
|
|
{
|
|
//coordinates we want to calculate
|
|
int origX = static_cast<int>(floor(factorX * x)),
|
|
origY = static_cast<int>(floor(factorY * y));
|
|
|
|
// Get pointers to source pixels
|
|
uint8_t *srcPtr = (uint8_t*)surf->pixels + origY * surf->pitch + origX * bpp;
|
|
uint8_t *destPtr = (uint8_t*)ret->pixels + y * ret->pitch + x * bpp;
|
|
|
|
memcpy(destPtr, srcPtr, bpp);
|
|
}
|
|
}
|
|
}
|
|
|
|
SDL_Surface * CSDL_Ext::scaleSurfaceFast(SDL_Surface *surf, int width, int height)
|
|
{
|
|
if (!surf || !width || !height)
|
|
return nullptr;
|
|
|
|
//Same size? return copy - this should more be faster
|
|
if (width == surf->w && height == surf->h)
|
|
return copySurface(surf);
|
|
|
|
SDL_Surface *ret = newSurface(width, height, surf);
|
|
|
|
switch(surf->format->BytesPerPixel)
|
|
{
|
|
case 1: scaleSurfaceFastInternal<1>(surf, ret); break;
|
|
case 2: scaleSurfaceFastInternal<2>(surf, ret); break;
|
|
case 3: scaleSurfaceFastInternal<3>(surf, ret); break;
|
|
case 4: scaleSurfaceFastInternal<4>(surf, ret); break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
template<int bpp>
|
|
void scaleSurfaceInternal(SDL_Surface *surf, SDL_Surface *ret)
|
|
{
|
|
const float factorX = float(surf->w - 1) / float(ret->w),
|
|
factorY = float(surf->h - 1) / float(ret->h);
|
|
|
|
for(int y = 0; y < ret->h; y++)
|
|
{
|
|
for(int x = 0; x < ret->w; x++)
|
|
{
|
|
//coordinates we want to interpolate
|
|
float origX = factorX * x,
|
|
origY = factorY * y;
|
|
|
|
float x1 = floor(origX), x2 = floor(origX+1),
|
|
y1 = floor(origY), y2 = floor(origY+1);
|
|
//assert( x1 >= 0 && y1 >= 0 && x2 < surf->w && y2 < surf->h);//All pixels are in range
|
|
|
|
// Calculate weights of each source pixel
|
|
float w11 = ((origX - x1) * (origY - y1));
|
|
float w12 = ((origX - x1) * (y2 - origY));
|
|
float w21 = ((x2 - origX) * (origY - y1));
|
|
float w22 = ((x2 - origX) * (y2 - origY));
|
|
//assert( w11 + w12 + w21 + w22 > 0.99 && w11 + w12 + w21 + w22 < 1.01);//total weight is ~1.0
|
|
|
|
// Get pointers to source pixels
|
|
uint8_t *p11 = (uint8_t*)surf->pixels + int(y1) * surf->pitch + int(x1) * bpp;
|
|
uint8_t *p12 = p11 + bpp;
|
|
uint8_t *p21 = p11 + surf->pitch;
|
|
uint8_t *p22 = p21 + bpp;
|
|
// Calculate resulting channels
|
|
#define PX(X, PTR) Channels::px<bpp>::X.get(PTR)
|
|
int resR = static_cast<int>(PX(r, p11) * w11 + PX(r, p12) * w12 + PX(r, p21) * w21 + PX(r, p22) * w22);
|
|
int resG = static_cast<int>(PX(g, p11) * w11 + PX(g, p12) * w12 + PX(g, p21) * w21 + PX(g, p22) * w22);
|
|
int resB = static_cast<int>(PX(b, p11) * w11 + PX(b, p12) * w12 + PX(b, p21) * w21 + PX(b, p22) * w22);
|
|
int resA = static_cast<int>(PX(a, p11) * w11 + PX(a, p12) * w12 + PX(a, p21) * w21 + PX(a, p22) * w22);
|
|
//assert(resR < 256 && resG < 256 && resB < 256 && resA < 256);
|
|
#undef PX
|
|
uint8_t *dest = (uint8_t*)ret->pixels + y * ret->pitch + x * bpp;
|
|
Channels::px<bpp>::r.set(dest, resR);
|
|
Channels::px<bpp>::g.set(dest, resG);
|
|
Channels::px<bpp>::b.set(dest, resB);
|
|
Channels::px<bpp>::a.set(dest, resA);
|
|
}
|
|
}
|
|
}
|
|
|
|
// scaling via bilinear interpolation algorithm.
|
|
// NOTE: best results are for scaling in range 50%...200%.
|
|
// And upscaling looks awful right now - should be fixed somehow
|
|
SDL_Surface * CSDL_Ext::scaleSurface(SDL_Surface *surf, int width, int height)
|
|
{
|
|
if (!surf || !width || !height)
|
|
return nullptr;
|
|
|
|
if (surf->format->palette)
|
|
return scaleSurfaceFast(surf, width, height);
|
|
|
|
//Same size? return copy - this should more be faster
|
|
if (width == surf->w && height == surf->h)
|
|
return copySurface(surf);
|
|
|
|
SDL_Surface *ret = newSurface(width, height, surf);
|
|
|
|
switch(surf->format->BytesPerPixel)
|
|
{
|
|
case 2: scaleSurfaceInternal<2>(surf, ret); break;
|
|
case 3: scaleSurfaceInternal<3>(surf, ret); break;
|
|
case 4: scaleSurfaceInternal<4>(surf, ret); break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void CSDL_Ext::blitSurface(SDL_Surface * src, const Rect & srcRectInput, SDL_Surface * dst, const Point & dstPoint)
|
|
{
|
|
SDL_Rect srcRect = CSDL_Ext::toSDL(srcRectInput);
|
|
SDL_Rect dstRect = CSDL_Ext::toSDL(Rect(dstPoint, srcRectInput.dimensions()));
|
|
|
|
int result = SDL_UpperBlit(src, &srcRect, dst, &dstRect);
|
|
|
|
if (result != 0)
|
|
logGlobal->error("SDL_UpperBlit failed! %s", SDL_GetError());
|
|
}
|
|
|
|
void CSDL_Ext::blitSurface(SDL_Surface * src, SDL_Surface * dst, const Point & dest)
|
|
{
|
|
Rect allSurface( Point(0,0), Point(src->w, src->h));
|
|
|
|
blitSurface(src, allSurface, dst, dest);
|
|
}
|
|
|
|
void CSDL_Ext::fillSurface( SDL_Surface *dst, const SDL_Color & color )
|
|
{
|
|
Rect allSurface( Point(0,0), Point(dst->w, dst->h));
|
|
|
|
fillRect(dst, allSurface, color);
|
|
}
|
|
|
|
void CSDL_Ext::fillRect( SDL_Surface *dst, const Rect & dstrect, const SDL_Color & color )
|
|
{
|
|
SDL_Rect newRect = CSDL_Ext::toSDL(dstrect);
|
|
|
|
uint32_t sdlColor = SDL_MapRGBA(dst->format, color.r, color.g, color.b, color.a);
|
|
SDL_FillRect(dst, &newRect, sdlColor);
|
|
}
|
|
|
|
SDL_Color CSDL_Ext::makeColor(ui8 r, ui8 g, ui8 b, ui8 a)
|
|
{
|
|
SDL_Color ret = {r, g, b, a};
|
|
return ret;
|
|
}
|
|
|
|
STRONG_INLINE static uint32_t mapColor(SDL_Surface * surface, SDL_Color color)
|
|
{
|
|
return SDL_MapRGBA(surface->format, color.r, color.g, color.b, color.a);
|
|
}
|
|
|
|
void CSDL_Ext::setColorKey(SDL_Surface * surface, SDL_Color color)
|
|
{
|
|
uint32_t key = mapColor(surface,color);
|
|
SDL_SetColorKey(surface, SDL_TRUE, key);
|
|
}
|
|
|
|
void CSDL_Ext::setDefaultColorKey(SDL_Surface * surface)
|
|
{
|
|
setColorKey(surface, Colors::DEFAULT_KEY_COLOR);
|
|
}
|
|
|
|
void CSDL_Ext::setDefaultColorKeyPresize(SDL_Surface * surface)
|
|
{
|
|
uint32_t key = mapColor(surface, Colors::DEFAULT_KEY_COLOR);
|
|
auto & color = surface->format->palette->colors[key];
|
|
|
|
// set color key only if exactly such color was found
|
|
if (color.r == Colors::DEFAULT_KEY_COLOR.r && color.g == Colors::DEFAULT_KEY_COLOR.g && color.b == Colors::DEFAULT_KEY_COLOR.b)
|
|
{
|
|
SDL_SetColorKey(surface, SDL_TRUE, key);
|
|
color.a = SDL_ALPHA_TRANSPARENT;
|
|
}
|
|
}
|
|
|
|
void CSDL_Ext::setClipRect(SDL_Surface * src, const Rect & other)
|
|
{
|
|
SDL_Rect rect = CSDL_Ext::toSDL(other);
|
|
|
|
SDL_SetClipRect(src, &rect);
|
|
}
|
|
|
|
void CSDL_Ext::getClipRect(SDL_Surface * src, Rect & other)
|
|
{
|
|
SDL_Rect rect;
|
|
|
|
SDL_GetClipRect(src, &rect);
|
|
|
|
other = CSDL_Ext::fromSDL(rect);
|
|
}
|
|
|
|
template SDL_Surface * CSDL_Ext::createSurfaceWithBpp<2>(int, int);
|
|
template SDL_Surface * CSDL_Ext::createSurfaceWithBpp<3>(int, int);
|
|
template SDL_Surface * CSDL_Ext::createSurfaceWithBpp<4>(int, int);
|
|
|