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-rw-r--r--src/guichan/sdl/sdlgraphics.cpp694
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diff --git a/src/guichan/sdl/sdlgraphics.cpp b/src/guichan/sdl/sdlgraphics.cpp
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+/* _______ __ __ __ ______ __ __ _______ __ __
+ * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\
+ * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
+ * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / /
+ * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / /
+ * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
+ * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
+ *
+ * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson
+ *
+ *
+ * Per Larsson a.k.a finalman
+ * Olof Naessén 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"
+
+// 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()
+ {
+ 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;
+ bool result = Graphics::pushClipArea(area);
+
+ const ClipRectangle& carea = mClipStack.top();
+ rect.x = carea.x;
+ rect.y = carea.y;
+ rect.w = carea.width;
+ rect.h = 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 = carea.x;
+ rect.y = carea.y;
+ rect.w = carea.width;
+ rect.h = carea.height;
+
+ SDL_SetClipRect(mTarget, &rect);
+ }
+
+ SDL_Surface* SDLGraphics::getTarget() const
+ {
+ return mTarget;
+ }
+
+ void SDLGraphics::drawImage(const Image* image,
+ int srcX,
+ int srcY,
+ int dstX,
+ int dstY,
+ int width,
+ int height)
+ {
+ 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();
+
+ SDL_Rect src;
+ SDL_Rect dst;
+ src.x = srcX;
+ src.y = srcY;
+ src.w = width;
+ src.h = height;
+ dst.x = dstX + top.xOffset;
+ dst.y = dstY + top.yOffset;
+
+ const SDLImage* srcImage = dynamic_cast<const SDLImage*>(image);
+
+ if (srcImage == NULL)
+ {
+ throw GCN_EXCEPTION("Trying to draw an image of unknown format, must be an SDLImage.");
+ }
+
+ SDL_BlitSurface(srcImage->getSurface(), &src, mTarget, &dst);
+ }
+
+ void SDLGraphics::fillRectangle(const Rectangle& rectangle)
+ {
+ 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();
+
+ Rectangle area = rectangle;
+ area.x += top.xOffset;
+ area.y += top.yOffset;
+
+ if(!area.isIntersecting(top))
+ {
+ return;
+ }
+
+ if (mAlpha)
+ {
+ int x1 = area.x > top.x ? area.x : top.x;
+ int y1 = area.y > top.y ? area.y : top.y;
+ int x2 = area.x + area.width < top.x + top.width ? area.x + area.width : top.x + top.width;
+ int y2 = area.y + area.height < top.y + top.height ? area.y + area.height : top.y + top.height;
+ int x, y;
+
+ SDL_LockSurface(mTarget);
+ for (y = y1; y < y2; y++)
+ {
+ for (x = x1; x < x2; x++)
+ {
+ SDLputPixelAlpha(mTarget, x, y, mColor);
+ }
+ }
+ SDL_UnlockSurface(mTarget);
+
+ }
+ else
+ {
+ SDL_Rect rect;
+ rect.x = area.x;
+ rect.y = area.y;
+ rect.w = area.width;
+ rect.h = area.height;
+
+ Uint32 color = SDL_MapRGBA(mTarget->format,
+ mColor.r,
+ mColor.g,
+ mColor.b,
+ mColor.a);
+ SDL_FillRect(mTarget, &rect, color);
+ }
+ }
+
+ 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;
+ }
+
+ int bpp = mTarget->format->BytesPerPixel;
+
+ SDL_LockSurface(mTarget);
+
+ Uint8 *p = (Uint8 *)mTarget->pixels + y * mTarget->pitch + x1 * bpp;
+
+ Uint32 pixel = SDL_MapRGB(mTarget->format,
+ mColor.r,
+ mColor.g,
+ mColor.b);
+ switch(bpp)
+ {
+ case 1:
+ for (;x1 <= x2; ++x1)
+ {
+ *(p++) = pixel;
+ }
+ break;
+
+ case 2:
+ {
+ Uint16* q = (Uint16*)p;
+ for (;x1 <= x2; ++x1)
+ {
+ *(q++) = pixel;
+ }
+ break;
+ }
+ case 3:
+ if(SDL_BYTEORDER == SDL_BIG_ENDIAN)
+ {
+ for (;x1 <= x2; ++x1)
+ {
+ p[0] = (pixel >> 16) & 0xff;
+ p[1] = (pixel >> 8) & 0xff;
+ p[2] = pixel & 0xff;
+ p += 3;
+ }
+ }
+ else
+ {
+ for (;x1 <= x2; ++x1)
+ {
+ p[0] = pixel & 0xff;
+ p[1] = (pixel >> 8) & 0xff;
+ p[2] = (pixel >> 16) & 0xff;
+ p += 3;
+ }
+ }
+ break;
+
+ case 4:
+ {
+ Uint32* q = (Uint32*)p;
+ for (;x1 <= x2; ++x1)
+ {
+ if (mAlpha)
+ {
+ *q = SDLAlpha32(pixel,*q,mColor.a);
+ q++;
+ }
+ else
+ {
+ *(q++) = pixel;
+ }
+ }
+ 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;
+ }
+
+ int bpp = mTarget->format->BytesPerPixel;
+
+ SDL_LockSurface(mTarget);
+
+ Uint8 *p = (Uint8 *)mTarget->pixels + y1 * mTarget->pitch + x * bpp;
+
+ Uint32 pixel = SDL_MapRGB(mTarget->format, mColor.r, mColor.g, mColor.b);
+
+ switch(bpp)
+ {
+ case 1:
+ for (;y1 <= y2; ++y1)
+ {
+ *p = pixel;
+ p += mTarget->pitch;
+ }
+ break;
+
+ case 2:
+ for (;y1 <= y2; ++y1)
+ {
+ *(Uint16*)p = pixel;
+ p += mTarget->pitch;
+ }
+ break;
+
+ case 3:
+ if(SDL_BYTEORDER == SDL_BIG_ENDIAN)
+ {
+ for (;y1 <= y2; ++y1)
+ {
+ p[0] = (pixel >> 16) & 0xff;
+ p[1] = (pixel >> 8) & 0xff;
+ p[2] = pixel & 0xff;
+ p += mTarget->pitch;
+ }
+ }
+ else
+ {
+ for (;y1 <= y2; ++y1)
+ {
+ p[0] = pixel & 0xff;
+ p[1] = (pixel >> 8) & 0xff;
+ p[2] = (pixel >> 16) & 0xff;
+ p += mTarget->pitch;
+ }
+ }
+ break;
+
+ case 4:
+ for (;y1 <= y2; ++y1)
+ {
+ if (mAlpha)
+ {
+ *(Uint32*)p = SDLAlpha32(pixel,*(Uint32*)p,mColor.a);
+ }
+ else
+ {
+ *(Uint32*)p = pixel;
+ }
+ p += mTarget->pitch;
+ }
+ break;
+
+ } // end switch
+
+ SDL_UnlockSurface(mTarget);
+ }
+
+ void SDLGraphics::drawRectangle(const Rectangle& rectangle)
+ {
+ int x1 = rectangle.x;
+ int x2 = rectangle.x + rectangle.width - 1;
+ int y1 = rectangle.y;
+ 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
+
+ int dx = ABS(x2 - x1);
+ 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);
+ }
+}
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