Mercurial > sdl-ios-xcode
view src/video/SDL_blit_slow.c @ 2825:620a91b6d263
Date: Tue, 02 Dec 2008 23:38:26 +0100
From: Couriersud
Subject: Re: SDL: Keyboard layout unknown
I have attached a diff which will add an additional keyboard layout to
the x11 driver. The issue arose, when I moved to ubuntu intrepid. I was
only able to map the keys available on my keyboard. The differences to
the existing keyboard was the mapping of HOME,UP,DOWN and some other
keys.
Now only one issue remains. Dead keys (e.g. ^, ` ') on european
keyboards do not generate a "scancode" event. Just a text event when the
key is composed (e.g. ?? ?? ??).
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Wed, 03 Dec 2008 04:32:24 +0000 |
parents | 4dba7aa7ea77 |
children | 99210400e8b9 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2006 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" #include "SDL_video.h" #include "SDL_blit.h" /* The ONE TRUE BLITTER * This puppy has to handle all the unoptimized cases - yes, it's slow. */ void SDL_Blit_Slow(SDL_BlitInfo * info) { const int flags = info->flags; const Uint32 modulateR = info->r; const Uint32 modulateG = info->g; const Uint32 modulateB = info->b; const Uint32 modulateA = info->a; Uint32 srcpixel; Uint32 srcR, srcG, srcB, srcA; Uint32 dstpixel; Uint32 dstR, dstG, dstB, dstA; int srcy, srcx; int posy, posx; int incy, incx; SDL_PixelFormat *src_fmt = info->src_fmt; SDL_PixelFormat *dst_fmt = info->dst_fmt; int srcbpp = src_fmt->BytesPerPixel; int dstbpp = dst_fmt->BytesPerPixel; srcy = 0; posy = 0; incy = (info->src_h << 16) / info->dst_h; incx = (info->src_w << 16) / info->dst_w; while (info->dst_h--) { Uint8 *src; Uint8 *dst = (Uint8 *) info->dst; int n = info->dst_w; srcx = -1; posx = 0x10000L; while (posy >= 0x10000L) { ++srcy; posy -= 0x10000L; } while (n--) { if (posx >= 0x10000L) { while (posx >= 0x10000L) { ++srcx; posx -= 0x10000L; } src = (info->src + (srcy * info->src_pitch) + (srcx * srcbpp)); } if (src_fmt->Amask) { DISEMBLE_RGBA(src, srcbpp, src_fmt, srcpixel, srcR, srcG, srcB, srcA); } else { DISEMBLE_RGB(src, srcbpp, src_fmt, srcpixel, srcR, srcG, srcB); srcA = 0xFF; } if (flags & SDL_COPY_COLORKEY) { /* srcpixel isn't set for 24 bpp */ if (srcbpp == 24) { srcpixel = (srcR << src_fmt->Rshift) | (srcG << src_fmt->Gshift) | (srcB << src_fmt->Bshift); } if (srcpixel == info->colorkey) { posx += incx; dst += dstbpp; continue; } } if (dst_fmt->Amask) { DISEMBLE_RGBA(dst, dstbpp, dst_fmt, dstpixel, dstR, dstG, dstB, dstA); } else { DISEMBLE_RGB(dst, dstbpp, dst_fmt, dstpixel, dstR, dstG, dstB); dstA = 0xFF; } if (flags & SDL_COPY_MODULATE_COLOR) { srcR = (srcR * modulateR) / 255; srcG = (srcG * modulateG) / 255; srcB = (srcB * modulateB) / 255; } if (flags & SDL_COPY_MODULATE_ALPHA) { srcA = (srcA * modulateA) / 255; } if (flags & (SDL_COPY_BLEND | SDL_COPY_ADD)) { /* This goes away if we ever use premultiplied alpha */ if (srcA < 255) { srcR = (srcR * srcA) / 255; srcG = (srcG * srcA) / 255; srcB = (srcB * srcA) / 255; } } switch (flags & (SDL_COPY_MASK | SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD)) { case 0: dstR = srcR; dstG = srcG; dstB = srcB; dstA = srcA; break; case SDL_COPY_MASK: if (srcA) { dstR = srcR; dstG = srcG; dstB = srcB; } break; case SDL_COPY_BLEND: dstR = srcR + ((255 - srcA) * dstR) / 255; dstG = srcG + ((255 - srcA) * dstG) / 255; dstB = srcB + ((255 - srcA) * dstB) / 255; break; case SDL_COPY_ADD: dstR = srcR + dstR; if (dstR > 255) dstR = 255; dstG = srcG + dstG; if (dstG > 255) dstG = 255; dstB = srcB + dstB; if (dstB > 255) dstB = 255; break; case SDL_COPY_MOD: dstR = (srcR * dstR) / 255; dstG = (srcG * dstG) / 255; dstB = (srcB * dstB) / 255; break; } if (dst_fmt->Amask) { ASSEMBLE_RGBA(dst, dstbpp, dst_fmt, dstR, dstG, dstB, dstA); } else { ASSEMBLE_RGB(dst, dstbpp, dst_fmt, dstR, dstG, dstB); } posx += incx; dst += dstbpp; } posy += incy; info->dst += info->dst_pitch; } } /* vi: set ts=4 sw=4 expandtab: */