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Diffstat (limited to 'src/sdl2graphics.cpp')
| -rw-r--r-- | src/sdl2graphics.cpp | 1150 |
1 files changed, 1150 insertions, 0 deletions
diff --git a/src/sdl2graphics.cpp b/src/sdl2graphics.cpp new file mode 100644 index 000000000..18b8b8e2e --- /dev/null +++ b/src/sdl2graphics.cpp @@ -0,0 +1,1150 @@ +/* + * The ManaPlus Client + * Copyright (C) 2004-2009 The Mana World Development Team + * Copyright (C) 2009-2010 The Mana Developers + * Copyright (C) 2011-2013 The ManaPlus Developers + * + * This file is part of The ManaPlus Client. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifdef USE_SDL2 + +#include "sdl2graphics.h" + +#include "main.h" + +#include "configuration.h" +#include "graphicsmanager.h" +#include "graphicsvertexes.h" +#include "logger.h" + +#include "resources/imagehelper.h" + +#include <guichan/sdl/sdlpixel.hpp> + +#include <SDL_gfxBlitFunc.h> + +#include "debug.h" + +int MSDL_gfxBlitRGBA(SDL_Surface *src, SDL_Rect *srcrect, + SDL_Surface *dst, SDL_Rect *dstrect) +{ + return SDL_gfxBlitRGBA(src, srcrect, dst, dstrect); +} + +#if SDL_BYTEORDER == SDL_LIL_ENDIAN +static unsigned int *cR = nullptr; +static unsigned int *cG = nullptr; +static unsigned int *cB = nullptr; +#endif + +SDLGraphics::SDLGraphics() : + Graphics(), + mBlitMode(BLIT_NORMAL), + mOldPixel(0), + mOldAlpha(0) +{ +} + +SDLGraphics::~SDLGraphics() +{ +} + +bool SDLGraphics::drawRescaledImage(const Image *const image, int srcX, int srcY, + int dstX, int dstY, + const int width, const int height, + const int desiredWidth, + const int desiredHeight, + const bool useColor A_UNUSED) +{ + FUNC_BLOCK("Graphics::drawRescaledImage", 1) + // Check that preconditions for blitting are met. + if (!mTarget || !image) + return false; + if (!image->mSDLSurface) + return false; + + Image *const tmpImage = image->SDLgetScaledImage( + desiredWidth, desiredHeight); + + if (!tmpImage) + return false; + if (!tmpImage->mSDLSurface) + return false; + + dstX += mClipStack.top().xOffset; + dstY += mClipStack.top().yOffset; + + srcX += image->mBounds.x; + srcY += image->mBounds.y; + + SDL_Rect dstRect; + SDL_Rect srcRect; + dstRect.x = static_cast<int16_t>(dstX); + dstRect.y = static_cast<int16_t>(dstY); + srcRect.x = static_cast<int16_t>(srcX); + srcRect.y = static_cast<int16_t>(srcY); + srcRect.w = static_cast<uint16_t>(width); + srcRect.h = static_cast<uint16_t>(height); + + const bool returnValue = !(SDL_BlitSurface(tmpImage->mSDLSurface, + &srcRect, mTarget, &dstRect) < 0); + + delete tmpImage; + + return returnValue; +} + +bool SDLGraphics::drawImage2(const Image *const image, int srcX, int srcY, + int dstX, int dstY, const int width, + const int height, const bool useColor A_UNUSED) +{ + FUNC_BLOCK("Graphics::drawImage2", 1) + // Check that preconditions for blitting are met. + if (!mTarget || !image || !image->mSDLSurface) + return false; + + dstX += mClipStack.top().xOffset; + dstY += mClipStack.top().yOffset; + + srcX += image->mBounds.x; + srcY += image->mBounds.y; + + SDL_Rect dstRect; + SDL_Rect srcRect; + dstRect.x = static_cast<int16_t>(dstX); + dstRect.y = static_cast<int16_t>(dstY); + srcRect.x = static_cast<int16_t>(srcX); + srcRect.y = static_cast<int16_t>(srcY); + srcRect.w = static_cast<uint16_t>(width); + srcRect.h = static_cast<uint16_t>(height); + + if (mBlitMode == BLIT_NORMAL) + { + return !(SDL_BlitSurface(image->mSDLSurface, &srcRect, + mTarget, &dstRect) < 0); + } + else + { + return !(SDL_gfxBlitRGBA(image->mSDLSurface, &srcRect, + mTarget, &dstRect) < 0); + } +} + +void SDLGraphics::drawImagePattern(const Image *const image, + const int x, const int y, + const int w, const int h) +{ + FUNC_BLOCK("Graphics::drawImagePattern", 1) + // Check that preconditions for blitting are met. + if (!mTarget || !image) + return; + if (!image->mSDLSurface) + return; + + const int iw = image->mBounds.w; + const int ih = image->mBounds.h; + + if (iw == 0 || ih == 0) + return; + + for (int py = 0; py < h; py += ih) // Y position on pattern plane + { + const int dh = (py + ih >= h) ? h - py : ih; + const int srcY = image->mBounds.y; + const int dstY = y + py + mClipStack.top().yOffset; + + for (int px = 0; px < w; px += iw) // X position on pattern plane + { + const int dw = (px + iw >= w) ? w - px : iw; + const int srcX = image->mBounds.x; + const int dstX = x + px + mClipStack.top().xOffset; + + SDL_Rect dstRect; + SDL_Rect srcRect; + dstRect.x = static_cast<int16_t>(dstX); + dstRect.y = static_cast<int16_t>(dstY); + srcRect.x = static_cast<int16_t>(srcX); + srcRect.y = static_cast<int16_t>(srcY); + srcRect.w = static_cast<uint16_t>(dw); + srcRect.h = static_cast<uint16_t>(dh); + + SDL_BlitSurface(image->mSDLSurface, &srcRect, mTarget, &dstRect); + } + } +} + +void SDLGraphics::drawRescaledImagePattern(const Image *const image, + const int x, const int y, + const int w, const int h, + const int scaledWidth, + const int scaledHeight) +{ + // Check that preconditions for blitting are met. + if (!mTarget || !image) + return; + if (!image->mSDLSurface) + return; + + if (scaledHeight == 0 || scaledWidth == 0) + return; + + Image *const tmpImage = image->SDLgetScaledImage( + scaledWidth, scaledHeight); + if (!tmpImage) + return; + + const int iw = tmpImage->mBounds.w; + const int ih = tmpImage->mBounds.h; + + if (iw == 0 || ih == 0) + return; + + for (int py = 0; py < h; py += ih) // Y position on pattern plane + { + const int dh = (py + ih >= h) ? h - py : ih; + const int srcY = tmpImage->mBounds.y; + const int dstY = y + py + mClipStack.top().yOffset; + + for (int px = 0; px < w; px += iw) // X position on pattern plane + { + const int dw = (px + iw >= w) ? w - px : iw; + const int srcX = tmpImage->mBounds.x; + const int dstX = x + px + mClipStack.top().xOffset; + + SDL_Rect dstRect; + SDL_Rect srcRect; + dstRect.x = static_cast<int16_t>(dstX); + dstRect.y = static_cast<int16_t>(dstY); + srcRect.x = static_cast<int16_t>(srcX); + srcRect.y = static_cast<int16_t>(srcY); + srcRect.w = static_cast<uint16_t>(dw); + srcRect.h = static_cast<uint16_t>(dh); + + SDL_BlitSurface(tmpImage->mSDLSurface, &srcRect, + mTarget, &dstRect); + } + } + + delete tmpImage; +} + +void SDLGraphics::calcImagePattern(ImageVertexes* const vert, + const Image *const image, + const int x, const int y, + const int w, const int h) const +{ + // Check that preconditions for blitting are met. + if (!vert || !mTarget || !image || !image->mSDLSurface) + return; + + const int iw = image->mBounds.w; + const int ih = image->mBounds.h; + + if (iw == 0 || ih == 0) + return; + + for (int py = 0; py < h; py += ih) // Y position on pattern plane + { + const int dh = (py + ih >= h) ? h - py : ih; + const int srcY = image->mBounds.y; + const int dstY = y + py + mClipStack.top().yOffset; + + for (int px = 0; px < w; px += iw) // X position on pattern plane + { + const int dw = (px + iw >= w) ? w - px : iw; + const int srcX = image->mBounds.x; + const int dstX = x + px + mClipStack.top().xOffset; + + DoubleRect *const r = new DoubleRect(); + SDL_Rect &dstRect = r->dst; + SDL_Rect &srcRect = r->src; + dstRect.x = static_cast<int16_t>(dstX); + dstRect.y = static_cast<int16_t>(dstY); + srcRect.x = static_cast<int16_t>(srcX); + srcRect.y = static_cast<int16_t>(srcY); + srcRect.w = static_cast<uint16_t>(dw); + srcRect.h = static_cast<uint16_t>(dh); + + if (SDL_FakeUpperBlit(image->mSDLSurface, &srcRect, + mTarget, &dstRect) == 1) + { + vert->sdl.push_back(r); + } + else + { + delete r; + } + } + } +} + +void SDLGraphics::calcImagePattern(ImageCollection* const vertCol, + const Image *const image, + const int x, const int y, + const int w, const int h) const +{ + ImageVertexes *vert = nullptr; + if (vertCol->currentImage != image) + { + vert = new ImageVertexes(); + vertCol->currentImage = image; + vertCol->currentVert = vert; + vert->image = image; + vertCol->draws.push_back(vert); + } + else + { + vert = vertCol->currentVert; + } + + calcImagePattern(vert, image, x, y, w, h); +} + +void SDLGraphics::calcTile(ImageVertexes *const vert, + const Image *const image, + int x, int y) const +{ + vert->image = image; + calcTileSDL(vert, x, y); +} + +void SDLGraphics::calcTileSDL(ImageVertexes *const vert, int x, int y) const +{ + // Check that preconditions for blitting are met. + if (!vert || !vert->image || !vert->image->mSDLSurface) + return; + + const Image *const image = vert->image; + + x += mClipStack.top().xOffset; + y += mClipStack.top().yOffset; + + DoubleRect *rect = new DoubleRect(); + + rect->dst.x = static_cast<int16_t>(x); + rect->dst.y = static_cast<int16_t>(y); + rect->src.x = static_cast<int16_t>(image->mBounds.x); + rect->src.y = static_cast<int16_t>(image->mBounds.y); + rect->src.w = static_cast<uint16_t>(image->mBounds.w); + rect->src.h = static_cast<uint16_t>(image->mBounds.h); + if (SDL_FakeUpperBlit(image->mSDLSurface, &rect->src, + mTarget, &rect->dst) == 1) + { + vert->sdl.push_back(rect); + } + else + { + delete rect; + } +} + +void SDLGraphics::calcTile(ImageCollection *const vertCol, + const Image *const image, + int x, int y) +{ + if (vertCol->currentImage != image) + { + ImageVertexes *const vert = new ImageVertexes(); + vertCol->currentImage = image; + vertCol->currentVert = vert; + vert->image = image; + vertCol->draws.push_back(vert); + calcTileSDL(vert, x, y); + } + else + { + calcTileSDL(vertCol->currentVert, x, y); + } +} + +void SDLGraphics::drawTile(const ImageCollection *const vertCol) +{ + const ImageVertexesVector &draws = vertCol->draws; + const ImageCollectionCIter it_end = draws.end(); + for (ImageCollectionCIter it = draws.begin(); it != it_end; ++ it) + { + const ImageVertexes *const vert = *it; + const Image *const img = vert->image; + const DoubleRects *const rects = &vert->sdl; + DoubleRects::const_iterator it2 = rects->begin(); + const DoubleRects::const_iterator it2_end = rects->end(); + while (it2 != it2_end) + { + SDL_LowerBlit(img->mSDLSurface, &(*it2)->src, + mTarget, &(*it2)->dst); + ++ it2; + } + } +} + +void SDLGraphics::drawTile(const ImageVertexes *const vert) +{ + // vert and img must be != 0 + const Image *const img = vert->image; + const DoubleRects *const rects = &vert->sdl; + DoubleRects::const_iterator it = rects->begin(); + const DoubleRects::const_iterator it_end = rects->end(); + while (it != it_end) + { + SDL_LowerBlit(img->mSDLSurface, &(*it)->src, mTarget, &(*it)->dst); + ++ it; + } +} + +void SDLGraphics::updateScreen() +{ + BLOCK_START("Graphics::updateScreen") + if (mDoubleBuffer) + { + SDL_Flip(mTarget); + } + else + { + SDL_UpdateRects(mTarget, 1, &mRect); +// SDL_UpdateRect(mTarget, 0, 0, 0, 0); + } + BLOCK_END("Graphics::updateScreen") +} + +SDL_Surface *SDLGraphics::getScreenshot() +{ +#if SDL_BYTEORDER == SDL_BIG_ENDIAN + const int rmask = 0xff000000; + const int gmask = 0x00ff0000; + const int bmask = 0x0000ff00; +#else + const int rmask = 0x000000ff; + const int gmask = 0x0000ff00; + const int bmask = 0x00ff0000; +#endif + const int amask = 0x00000000; + + SDL_Surface *const screenshot = SDL_CreateRGBSurface(SDL_SWSURFACE, + mTarget->w, mTarget->h, 24, rmask, gmask, bmask, amask); + + if (screenshot) + SDL_BlitSurface(mTarget, nullptr, screenshot, nullptr); + + return screenshot; +} + +bool SDLGraphics::drawNet(const int x1, const int y1, + const int x2, const int y2, + const int width, const int height) +{ + for (int y = y1; y < y2; y += height) + drawLine(x1, y, x2, y); + + for (int x = x1; x < x2; x += width) + drawLine(x, y1, x, y2); + + return true; +} + +bool SDLGraphics::calcWindow(ImageCollection *const vertCol, + const int x, const int y, + const int w, const int h, + const ImageRect &imgRect) +{ + ImageVertexes *vert = nullptr; + Image *const image = imgRect.grid[4]; + if (vertCol->currentImage != image) + { + vert = new ImageVertexes(); + vertCol->currentImage = image; + vertCol->currentVert = vert; + vert->image = image; + vertCol->draws.push_back(vert); + } + else + { + vert = vertCol->currentVert; + } + + return calcImageRect(vert, x, y, w, h, + imgRect.grid[0], imgRect.grid[2], imgRect.grid[6], imgRect.grid[8], + imgRect.grid[1], imgRect.grid[5], imgRect.grid[7], imgRect.grid[3], + imgRect.grid[4]); +} + +int SDLGraphics::SDL_FakeUpperBlit(const SDL_Surface *const src, + SDL_Rect *const srcrect, + const SDL_Surface *const dst, + SDL_Rect *dstrect) const +{ + SDL_Rect fulldst; + int srcx, srcy, w, h; + + // Make sure the surfaces aren't locked + if (!src || !dst) + return -1; + + if (src->locked || dst->locked) + return -1; + + // If the destination rectangle is nullptr, use the entire dest surface + if (!dstrect) + { + fulldst.x = 0; + fulldst.y = 0; + dstrect = &fulldst; + } + + // clip the source rectangle to the source surface + if (srcrect) + { + srcx = srcrect->x; + w = srcrect->w; + if (srcx < 0) + { + w += srcx; + dstrect->x -= static_cast<int16_t>(srcx); + srcx = 0; + } + int maxw = src->w - srcx; + if (maxw < w) + w = maxw; + + srcy = srcrect->y; + h = srcrect->h; + if (srcy < 0) + { + h += srcy; + dstrect->y -= static_cast<int16_t>(srcy); + srcy = 0; + } + int maxh = src->h - srcy; + if (maxh < h) + h = maxh; + } + else + { + srcx = 0; + srcy = 0; + w = src->w; + h = src->h; + } + + // clip the destination rectangle against the clip rectangle + { + const SDL_Rect *const clip = &dst->clip_rect; + int dx = clip->x - dstrect->x; + if (dx > 0) + { + w -= dx; + dstrect->x += static_cast<int16_t>(dx); + srcx += dx; + } + dx = dstrect->x + w - clip->x - clip->w; + if (dx > 0) + w -= dx; + + int dy = clip->y - dstrect->y; + if (dy > 0) + { + h -= dy; + dstrect->y += static_cast<int16_t>(dy); + srcy += dy; + } + dy = dstrect->y + h - clip->y - clip->h; + if (dy > 0) + h -= dy; + } + + if (w > 0 && h > 0) + { + if (srcrect) + { + srcrect->x = static_cast<int16_t>(srcx); + srcrect->y = static_cast<int16_t>(srcy); + srcrect->w = static_cast<int16_t>(w); + srcrect->h = static_cast<int16_t>(h); + } + dstrect->w = static_cast<int16_t>(w); + dstrect->h = static_cast<int16_t>(h); + + return 1; +// return SDL_LowerBlit(src, &sr, dst, dstrect); + } + dstrect->w = dstrect->h = 0; + return 0; +} + +void SDLGraphics::fillRectangle(const gcn::Rectangle& rectangle) +{ + FUNC_BLOCK("Graphics::fillRectangle", 1) + if (mClipStack.empty()) + return; + + const gcn::ClipRectangle& top = mClipStack.top(); + + gcn::Rectangle area = rectangle; + area.x += top.xOffset; + area.y += top.yOffset; + + if (!area.isIntersecting(top)) + return; + + if (mAlpha) + { + const int x1 = area.x > top.x ? area.x : top.x; + const int y1 = area.y > top.y ? area.y : top.y; + const int x2 = area.x + area.width < top.x + top.width ? + area.x + area.width : top.x + top.width; + const int y2 = area.y + area.height < top.y + top.height ? + area.y + area.height : top.y + top.height; + int x, y; + + SDL_LockSurface(mTarget); + + const int bpp = mTarget->format->BytesPerPixel; + 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 (y = y1; y < y2; y++) + { + uint8_t *const p = static_cast<uint8_t *>(mTarget->pixels) + + y * mTarget->pitch; + for (x = x1; x < x2; x++) + *(p + x) = static_cast<uint8_t>(pixel); + } + break; + case 2: + for (y = y1; y < y2; y++) + { + uint8_t *const p0 = static_cast<uint8_t *>(mTarget->pixels) + + y * mTarget->pitch; + for (x = x1; x < x2; x++) + { + uint8_t *const p = p0 + x * 2; + *reinterpret_cast<uint16_t *>(p) = gcn::SDLAlpha16( + static_cast<uint16_t>(pixel), + *reinterpret_cast<uint16_t *>(p), + static_cast<uint8_t>(mColor.a), mTarget->format); + } + } + break; + case 3: + { + const int ca = 255 - mColor.a; + const int cr = mColor.r * mColor.a; + const int cg = mColor.g * mColor.a; + const int cb = mColor.b * mColor.a; + + for (y = y1; y < y2; y++) + { + uint8_t *const p0 = static_cast<uint8_t *>(mTarget->pixels) + + y * mTarget->pitch; + for (x = x1; x < x2; x++) + { + uint8_t *const p = p0 + x * 3; +#if SDL_BYTEORDER == SDL_BIG_ENDIAN + p[2] = static_cast<uint8_t>((p[2] * ca + cb) >> 8); + p[1] = static_cast<uint8_t>((p[1] * ca + cg) >> 8); + p[0] = static_cast<uint8_t>((p[0] * ca + cr) >> 8); +#else + p[0] = static_cast<uint8_t>((p[0] * ca + cb) >> 8); + p[1] = static_cast<uint8_t>((p[1] * ca + cg) >> 8); + p[2] = static_cast<uint8_t>((p[2] * ca + cr) >> 8); +#endif + } + } + break; + } + case 4: + { +#if SDL_BYTEORDER == SDL_BIG_ENDIAN + const unsigned pb = (pixel & 0xff) * mColor.a; + const unsigned pg = (pixel & 0xff00) * mColor.a; + const unsigned pr = (pixel & 0xff0000) * mColor.a; + const unsigned a1 = (255 - mColor.a); + + for (y = y1; y < y2; y++) + { + uint8_t *const p0 = static_cast<uint8_t *>(mTarget->pixels) + + y * mTarget->pitch; + for (x = x1; x < x2; x++) + { + uint8_t *p = p0 + x * 4; + uint32_t dst = *reinterpret_cast<uint32_t *>(p); + const unsigned int b = (pb + (dst & 0xff) * a1) >> 8; + const unsigned int g = (pg + (dst & 0xff00) * a1) >> 8; + const unsigned int r = (pr + + (dst & 0xff0000) * a1) >> 8; + + *reinterpret_cast<uint32_t *>(p) = ((b & 0xff) + | (g & 0xff00) | (r & 0xff0000)); + } + } +#else + if (!cR) + { + cR = new unsigned int[0x100]; + cG = new unsigned int[0x100]; + cB = new unsigned int[0x100]; + mOldPixel = 0; + mOldAlpha = mColor.a; + } + + const SDL_PixelFormat * const format = mTarget->format; + const unsigned rMask = format->Rmask; + const unsigned gMask = format->Gmask; + const unsigned bMask = format->Bmask; +// const unsigned aMask = format->Amask; + unsigned rShift = rMask / 0xff; + unsigned gShift = gMask / 0xff; + unsigned bShift = bMask / 0xff; + if (!rShift) + rShift = 1; + if (!gShift) + gShift = 1; + if (!bShift) + bShift = 1; + if (pixel != mOldPixel || mColor.a != mOldAlpha) + { + const unsigned pb = (pixel & bMask) * mColor.a; + const unsigned pg = (pixel & gMask) * mColor.a; + const unsigned pr = (pixel & rMask) * mColor.a; + const unsigned a0 = (255 - mColor.a); + + const unsigned int a1 = a0 * bShift; + const unsigned int a2 = a0 * gShift; + const unsigned int a3 = a0 * rShift; + + for (int f = 0; f <= 0xff; f ++) + { + cB[f] = ((pb + f * a1) >> 8) & bMask; + cG[f] = ((pg + f * a2) >> 8) & gMask; + cR[f] = ((pr + f * a3) >> 8) & rMask; + } + + mOldPixel = pixel; + mOldAlpha = mColor.a; + } + + for (y = y1; y < y2; y++) + { + uint32_t *const p0 = reinterpret_cast<uint32_t*>( + static_cast<uint8_t*>(mTarget->pixels) + + y * mTarget->pitch); + for (x = x1; x < x2; x++) + { + uint32_t *const p = p0 + x; + const uint32_t dst = *p; + *p = cB[dst & bMask / bShift] + | cG[(dst & gMask) / gShift] + | cR[(dst & rMask) / rShift]; + } + } +#endif + break; + } + default: + break; + } + + SDL_UnlockSurface(mTarget); + } + else + { + SDL_Rect rect; + rect.x = static_cast<int16_t>(area.x); + rect.y = static_cast<int16_t>(area.y); + rect.w = static_cast<uint16_t>(area.width); + rect.h = static_cast<uint16_t>(area.height); + + const uint32_t color = SDL_MapRGBA(mTarget->format, + static_cast<int8_t>(mColor.r), + static_cast<int8_t>(mColor.g), + static_cast<int8_t>(mColor.b), + static_cast<int8_t>(mColor.a)); + SDL_FillRect(mTarget, &rect, color); + } +} + +void SDLGraphics::_beginDraw() +{ + pushClipArea(gcn::Rectangle(0, 0, mTarget->w, mTarget->h)); +} + +void SDLGraphics::_endDraw() +{ + popClipArea(); +} + +bool SDLGraphics::pushClipArea(gcn::Rectangle area) +{ + SDL_Rect rect; + const bool result = gcn::Graphics::pushClipArea(area); + + const gcn::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() +{ + gcn::Graphics::popClipArea(); + + if (mClipStack.empty()) + return; + + const gcn::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); +} + +void SDLGraphics::drawPoint(int x, int y) +{ + if (mClipStack.empty()) + return; + + const gcn::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()) + return; + + const gcn::ClipRectangle& top = mClipStack.top(); + + const int xOffset = top.xOffset; + x1 += xOffset; + y += top.yOffset; + x2 += xOffset; + + const int topY = top.y; + if (y < topY || y >= topY + top.height) + return; + + if (x1 > x2) + { + x1 ^= x2; + x2 ^= x1; + x1 ^= x2; + } + + const int topX = top.x; + if (topX > x1) + { + if (topX > x2) + return; + + x1 = topX; + } + + const int sumX = topX + top.width; + if (sumX <= x2) + { + if (sumX <= x1) + return; + + x2 = sumX -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++) = pixel; + break; + } + + case 3: + { + const uint8_t b0 = static_cast<uint8_t>((pixel >> 16) & 0xff); + const uint8_t b1 = static_cast<uint8_t>((pixel >> 8) & 0xff); + const uint8_t b2 = static_cast<uint8_t>(pixel & 0xff); +#if SDL_BYTEORDER == SDL_BIG_ENDIAN + for (; x1 <= x2; ++x1) + { + p[0] = b0; + p[1] = b1; + p[2] = b2; + p += 3; + } +#else + for (; x1 <= x2; ++x1) + { + p[0] = b2; + p[1] = b1; + p[2] = b0; + p += 3; + } +#endif + break; + } + + case 4: + { + uint32_t *q = reinterpret_cast<uint32_t*>(p); + if (mAlpha) + { + unsigned char a = static_cast<unsigned char>(mColor.a); + unsigned char a1 = 255 - a; + const int b0 = (pixel & 0xff) * a; + const int g0 = (pixel & 0xff00) * a; + const int r0 = (pixel & 0xff0000) * a; + for (; x1 <= x2; ++x1) + { + const unsigned int b = (b0 + (*q & 0xff) * a1) >> 8; + const unsigned int g = (g0 + (*q & 0xff00) * a1) >> 8; + const unsigned int r = (r0 + (*q & 0xff0000) * a1) >> 8; + *q = (b & 0xff) | (g & 0xff00) | (r & 0xff0000); + + q++; + } + } + else + { + for (; x1 <= x2; ++x1) + *(q++) = pixel; + } + break; + } + default: + break; + } // end switch + + SDL_UnlockSurface(mTarget); +} + +void SDLGraphics::drawVLine(int x, int y1, int y2) +{ + if (mClipStack.empty()) + return; + + const gcn::ClipRectangle& top = mClipStack.top(); + + const int yOffset = top.yOffset; + x += top.xOffset; + y1 += yOffset; + y2 += 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; + } + + const int sumY = top.y + top.height; + if (sumY <= y2) + { + if (sumY <= y1) + return; + + y2 = sumY - 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)); + + const int pitch = mTarget->pitch; + switch (bpp) + { + case 1: + for (; y1 <= y2; ++y1) + { + *p = static_cast<uint8_t>(pixel); + p += pitch; + } + break; + + case 2: + for (; y1 <= y2; ++ y1) + { + *reinterpret_cast<uint16_t*>(p) + = static_cast<uint16_t>(pixel); + p += pitch; + } + break; + + case 3: + { + const uint8_t b0 = static_cast<uint8_t>((pixel >> 16) & 0xff); + const uint8_t b1 = static_cast<uint8_t>((pixel >> 8) & 0xff); + const uint8_t b2 = static_cast<uint8_t>(pixel & 0xff); +#if SDL_BYTEORDER == SDL_BIG_ENDIAN + for (; y1 <= y2; ++y1) + { + p[0] = b0; + p[1] = b1; + p[2] = b2; + p += pitch; + } +#else + for (; y1 <= y2; ++y1) + { + p[0] = b2; + p[1] = b1; + p[2] = b0; + p += pitch; + } +#endif + break; + } + + case 4: + { + if (mAlpha) + { + unsigned char a = static_cast<unsigned char>(mColor.a); + unsigned char a1 = 255 - a; + const int b0 = (pixel & 0xff) * a; + const int g0 = (pixel & 0xff00) * a; + const int r0 = (pixel & 0xff0000) * a; + for (; y1 <= y2; ++y1) + { + const unsigned int dst = *reinterpret_cast<uint32_t*>(p); + const unsigned int b = (b0 + (dst & 0xff) * a1) >> 8; + const unsigned int g = (g0 + (dst & 0xff00) * a1) >> 8; + const unsigned int r = (r0 + (dst & 0xff0000) * a1) >> 8; + *reinterpret_cast<uint32_t*>(p) = + (b & 0xff) | (g & 0xff00) | (r & 0xff0000); + + p += pitch; + } + } + else + { + for (; y1 <= y2; ++y1) + { + *reinterpret_cast<uint32_t*>(p) = pixel; + p += pitch; + } + } + break; + } + + default: + break; + } // end switch + + SDL_UnlockSurface(mTarget); +} + +void SDLGraphics::drawRectangle(const gcn::Rectangle &rectangle) +{ + const int x1 = rectangle.x; + const int x2 = x1 + rectangle.width - 1; + const int y1 = rectangle.y; + const int y2 = y1 + 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; + } + + // other cases not implimented +} + +bool SDLGraphics::setVideoMode(const int w, const int h, const int bpp, + const bool fs, const bool hwaccel, + const bool resize, const bool noFrame) +{ + setMainFlags(w, h, bpp, fs, hwaccel, resize, noFrame); + + if (!(mTarget = SDL_SetVideoMode(w, h, bpp, getSoftwareFlags()))) + return false; + + mRect.w = static_cast<uint16_t>(mTarget->w); + mRect.h = static_cast<uint16_t>(mTarget->h); + + return videoInfo(); +} + +#endif // USE_SDL2 |