/* _______ __ __ __ ______ __ __ _______ __ __ * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\ * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / / * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / / * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / / * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ / * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/ * * Copyright (c) 2004 - 2008 Olof Naess�n and Per Larsson * Copyright (C) 2011-2012 The ManaPlus Developers * * * Per Larsson a.k.a finalman * Olof Naess�n a.k.a jansem/yakslem * * Visit: http://guichan.sourceforge.net * * License: (BSD) * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name of Guichan nor the names of its contributors may * be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * For comments regarding functions please see the header file. */ #include "guichan/sdl/sdlgraphics.hpp" #include "guichan/exception.hpp" #include "guichan/font.hpp" #include "guichan/image.hpp" #include "guichan/sdl/sdlimage.hpp" #include "guichan/sdl/sdlpixel.hpp" #include "debug.h" // For some reason an old version of MSVC did not like std::abs, // so we added this macro. #ifndef ABS #define ABS(x) ((x)<0?-(x):(x)) #endif namespace gcn { SDLGraphics::SDLGraphics() : mTarget(nullptr), mAlpha(false) { } void SDLGraphics::_beginDraw() { Rectangle area; area.x = 0; area.y = 0; area.width = mTarget->w; area.height = mTarget->h; pushClipArea(area); } void SDLGraphics::_endDraw() { popClipArea(); } void SDLGraphics::setTarget(SDL_Surface* target) { mTarget = target; } bool SDLGraphics::pushClipArea(Rectangle area) { SDL_Rect rect; const bool result = Graphics::pushClipArea(area); const ClipRectangle& carea = mClipStack.top(); rect.x = static_cast<int16_t>(carea.x); rect.y = static_cast<int16_t>(carea.y); rect.w = static_cast<int16_t>(carea.width); rect.h = static_cast<int16_t>(carea.height); SDL_SetClipRect(mTarget, &rect); return result; } void SDLGraphics::popClipArea() { Graphics::popClipArea(); if (mClipStack.empty()) return; const ClipRectangle& carea = mClipStack.top(); SDL_Rect rect; rect.x = static_cast<int16_t>(carea.x); rect.y = static_cast<int16_t>(carea.y); rect.w = static_cast<int16_t>(carea.width); rect.h = static_cast<int16_t>(carea.height); SDL_SetClipRect(mTarget, &rect); } SDL_Surface* SDLGraphics::getTarget() const { return mTarget; } void SDLGraphics::drawImage(const Image* image A_UNUSED, int srcX A_UNUSED, int srcY A_UNUSED, int dstX A_UNUSED, int dstY A_UNUSED, int width A_UNUSED, int height A_UNUSED) { } void SDLGraphics::fillRectangle(const Rectangle& rectangle A_UNUSED) { } void SDLGraphics::drawPoint(int x, int y) { if (mClipStack.empty()) { throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a " "draw funtion outside of _beginDraw() and _endDraw()?"); } const ClipRectangle& top = mClipStack.top(); x += top.xOffset; y += top.yOffset; if (!top.isPointInRect(x, y)) return; if (mAlpha) SDLputPixelAlpha(mTarget, x, y, mColor); else SDLputPixel(mTarget, x, y, mColor); } void SDLGraphics::drawHLine(int x1, int y, int x2) { if (mClipStack.empty()) { throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a " "draw funtion outside of _beginDraw() and _endDraw()?"); } const ClipRectangle& top = mClipStack.top(); x1 += top.xOffset; y += top.yOffset; x2 += top.xOffset; if (y < top.y || y >= top.y + top.height) return; if (x1 > x2) { x1 ^= x2; x2 ^= x1; x1 ^= x2; } if (top.x > x1) { if (top.x > x2) return; x1 = top.x; } if (top.x + top.width <= x2) { if (top.x + top.width <= x1) return; x2 = top.x + top.width -1; } const int bpp = mTarget->format->BytesPerPixel; SDL_LockSurface(mTarget); uint8_t *p = static_cast<uint8_t*>(mTarget->pixels) + y * mTarget->pitch + x1 * bpp; const uint32_t pixel = SDL_MapRGB(mTarget->format, static_cast<uint8_t>(mColor.r), static_cast<uint8_t>(mColor.g), static_cast<uint8_t>(mColor.b)); switch (bpp) { case 1: for (; x1 <= x2; ++x1) *(p++) = static_cast<uint8_t>(pixel); break; case 2: { uint16_t* q = reinterpret_cast<uint16_t*>(p); for (; x1 <= x2; ++x1) *(q++) = static_cast<uint8_t>(pixel); break; } case 3: if (SDL_BYTEORDER == SDL_BIG_ENDIAN) { for (; x1 <= x2; ++x1) { p[0] = static_cast<uint8_t>((pixel >> 16) & 0xff); p[1] = static_cast<uint8_t>((pixel >> 8) & 0xff); p[2] = static_cast<uint8_t>(pixel & 0xff); p += 3; } } else { for (; x1 <= x2; ++x1) { p[0] = static_cast<uint8_t>(pixel & 0xff); p[1] = static_cast<uint8_t>((pixel >> 8) & 0xff); p[2] = static_cast<uint8_t>((pixel >> 16) & 0xff); p += 3; } } break; case 4: { uint32_t *q = reinterpret_cast<uint32_t*>(p); for (; x1 <= x2; ++x1) { if (mAlpha) { *q = SDLAlpha32(pixel, *q, static_cast<unsigned char>(mColor.a)); q++; } else { *(q++) = pixel; } } break; } default: break; } // end switch SDL_UnlockSurface(mTarget); } void SDLGraphics::drawVLine(int x, int y1, int y2) { if (mClipStack.empty()) { throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a " "draw funtion outside of _beginDraw() and _endDraw()?"); } const ClipRectangle& top = mClipStack.top(); x += top.xOffset; y1 += top.yOffset; y2 += top.yOffset; if (x < top.x || x >= top.x + top.width) return; if (y1 > y2) { y1 ^= y2; y2 ^= y1; y1 ^= y2; } if (top.y > y1) { if (top.y > y2) return; y1 = top.y; } if (top.y + top.height <= y2) { if (top.y + top.height <= y1) return; y2 = top.y + top.height - 1; } const int bpp = mTarget->format->BytesPerPixel; SDL_LockSurface(mTarget); uint8_t *p = static_cast<uint8_t*>(mTarget->pixels) + y1 * mTarget->pitch + x * bpp; const uint32_t pixel = SDL_MapRGB(mTarget->format, static_cast<uint8_t>(mColor.r), static_cast<uint8_t>(mColor.g), static_cast<uint8_t>(mColor.b)); switch (bpp) { case 1: for (; y1 <= y2; ++y1) { *p = static_cast<uint8_t>(pixel); p += mTarget->pitch; } break; case 2: for (; y1 <= y2; ++ y1) { *reinterpret_cast<uint16_t*>(p) = static_cast<uint16_t>(pixel); p += mTarget->pitch; } break; case 3: if (SDL_BYTEORDER == SDL_BIG_ENDIAN) { for (; y1 <= y2; ++y1) { p[0] = static_cast<uint8_t>((pixel >> 16) & 0xff); p[1] = static_cast<uint8_t>((pixel >> 8) & 0xff); p[2] = static_cast<uint8_t>(pixel & 0xff); p += mTarget->pitch; } } else { for (; y1 <= y2; ++y1) { p[0] = static_cast<uint8_t>(pixel & 0xff); p[1] = static_cast<uint8_t>((pixel >> 8) & 0xff); p[2] = static_cast<uint8_t>((pixel >> 16) & 0xff); p += mTarget->pitch; } } break; case 4: for (; y1 <= y2; ++y1) { if (mAlpha) { *reinterpret_cast<uint32_t*>(p) = SDLAlpha32(pixel, *reinterpret_cast<uint32_t*>(p), static_cast<unsigned char>(mColor.a)); } else { *reinterpret_cast<uint32_t*>(p) = pixel; } p += mTarget->pitch; } break; default: break; } // end switch SDL_UnlockSurface(mTarget); } void SDLGraphics::drawRectangle(const Rectangle& rectangle) { const int x1 = rectangle.x; const int x2 = rectangle.x + rectangle.width - 1; const int y1 = rectangle.y; const int y2 = rectangle.y + rectangle.height - 1; drawHLine(x1, y1, x2); drawHLine(x1, y2, x2); drawVLine(x1, y1, y2); drawVLine(x2, y1, y2); } void SDLGraphics::drawLine(int x1, int y1, int x2, int y2) { if (x1 == x2) { drawVLine(x1, y1, y2); return; } if (y1 == y2) { drawHLine(x1, y1, x2); return; } if (mClipStack.empty()) { throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a " "draw funtion outside of _beginDraw() and _endDraw()?"); } const ClipRectangle& top = mClipStack.top(); x1 += top.xOffset; y1 += top.yOffset; x2 += top.xOffset; y2 += top.yOffset; // Draw a line with Bresenham const int dx = ABS(x2 - x1); const int dy = ABS(y2 - y1); if (dx > dy) { if (x1 > x2) { // swap x1, x2 x1 ^= x2; x2 ^= x1; x1 ^= x2; // swap y1, y2 y1 ^= y2; y2 ^= y1; y1 ^= y2; } if (y1 < y2) { int y = y1; int p = 0; for (int x = x1; x <= x2; x++) { if (top.isPointInRect(x, y)) { if (mAlpha) SDLputPixelAlpha(mTarget, x, y, mColor); else SDLputPixel(mTarget, x, y, mColor); } p += dy; if (p * 2 >= dx) { y++; p -= dx; } } } else { int y = y1; int p = 0; for (int x = x1; x <= x2; x++) { if (top.isPointInRect(x, y)) { if (mAlpha) SDLputPixelAlpha(mTarget, x, y, mColor); else SDLputPixel(mTarget, x, y, mColor); } p += dy; if (p * 2 >= dx) { y--; p -= dx; } } } } else { if (y1 > y2) { // swap y1, y2 y1 ^= y2; y2 ^= y1; y1 ^= y2; // swap x1, x2 x1 ^= x2; x2 ^= x1; x1 ^= x2; } if (x1 < x2) { int x = x1; int p = 0; for (int y = y1; y <= y2; y++) { if (top.isPointInRect(x, y)) { if (mAlpha) SDLputPixelAlpha(mTarget, x, y, mColor); else SDLputPixel(mTarget, x, y, mColor); } p += dx; if (p * 2 >= dy) { x++; p -= dy; } } } else { int x = x1; int p = 0; for (int y = y1; y <= y2; y++) { if (top.isPointInRect(x, y)) { if (mAlpha) SDLputPixelAlpha(mTarget, x, y, mColor); else SDLputPixel(mTarget, x, y, mColor); } p += dx; if (p * 2 >= dy) { x--; p -= dy; } } } } } void SDLGraphics::setColor(const Color& color) { mColor = color; mAlpha = color.a != 255; } const Color& SDLGraphics::getColor() const { return mColor; } void SDLGraphics::drawSDLSurface(SDL_Surface* surface, SDL_Rect source, SDL_Rect destination) { if (mClipStack.empty()) { throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a " "draw funtion outside of _beginDraw() and _endDraw()?"); } const ClipRectangle& top = mClipStack.top(); destination.x += top.xOffset; destination.y += top.yOffset; SDL_BlitSurface(surface, &source, mTarget, &destination); } }