slouken@0
|
1 |
/*
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slouken@0
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SDL - Simple DirectMedia Layer
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slouken@1312
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Copyright (C) 1997-2006 Sam Lantinga
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slouken@0
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slouken@0
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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slouken@0
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License as published by the Free Software Foundation; either
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slouken@1312
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version 2.1 of the License, or (at your option) any later version.
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slouken@0
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9 |
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slouken@0
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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slouken@0
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 |
Lesser General Public License for more details.
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slouken@0
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slouken@1312
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You should have received a copy of the GNU Lesser General Public
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slouken@1312
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License along with this library; if not, write to the Free Software
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slouken@1312
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17 |
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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slouken@0
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18 |
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slouken@0
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19 |
Sam Lantinga
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slouken@252
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20 |
slouken@libsdl.org
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slouken@0
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*/
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slouken@1402
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22 |
#include "SDL_config.h"
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slouken@0
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23 |
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slouken@0
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24 |
#include "SDL_video.h"
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slouken@0
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#include "SDL_sysvideo.h"
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slouken@0
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#include "SDL_cursor_c.h"
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slouken@0
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#include "SDL_blit.h"
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slouken@0
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#include "SDL_RLEaccel_c.h"
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slouken@0
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#include "SDL_pixels_c.h"
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slouken@0
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#include "SDL_leaks.h"
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slouken@0
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31 |
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icculus@1251
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slouken@0
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/* Public routines */
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slouken@0
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/*
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slouken@0
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* Create an empty RGB surface of the appropriate depth
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slouken@0
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*/
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slouken@0
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SDL_Surface * SDL_CreateRGBSurface (Uint32 flags,
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slouken@0
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int width, int height, int depth,
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slouken@0
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Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
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slouken@0
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{
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slouken@0
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SDL_VideoDevice *video = current_video;
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slouken@0
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SDL_VideoDevice *this = current_video;
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slouken@0
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SDL_Surface *screen;
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slouken@0
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SDL_Surface *surface;
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slouken@0
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slouken@940
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/* Make sure the size requested doesn't overflow our datatypes */
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slouken@940
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/* Next time I write a library like SDL, I'll use int for size. :) */
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slouken@1017
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if ( width >= 16384 || height >= 65536 ) {
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slouken@940
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SDL_SetError("Width or height is too large");
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slouken@940
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return(NULL);
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slouken@940
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}
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slouken@940
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slouken@0
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/* Check to see if we desire the surface in video memory */
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slouken@0
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if ( video ) {
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slouken@0
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screen = SDL_PublicSurface;
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slouken@0
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} else {
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slouken@0
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screen = NULL;
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slouken@0
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}
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slouken@0
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if ( screen && ((screen->flags&SDL_HWSURFACE) == SDL_HWSURFACE) ) {
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slouken@0
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if ( (flags&(SDL_SRCCOLORKEY|SDL_SRCALPHA)) != 0 ) {
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slouken@0
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flags |= SDL_HWSURFACE;
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slouken@0
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}
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slouken@0
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if ( (flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
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slouken@0
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if ( ! current_video->info.blit_hw_CC ) {
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slouken@0
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flags &= ~SDL_HWSURFACE;
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slouken@0
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}
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slouken@0
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}
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slouken@0
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if ( (flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
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slouken@0
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if ( ! current_video->info.blit_hw_A ) {
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slouken@0
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flags &= ~SDL_HWSURFACE;
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slouken@0
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}
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slouken@0
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}
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slouken@0
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} else {
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slouken@0
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flags &= ~SDL_HWSURFACE;
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slouken@0
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}
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slouken@0
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slouken@0
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/* Allocate the surface */
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slouken@1336
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surface = (SDL_Surface *)SDL_malloc(sizeof(*surface));
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slouken@0
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if ( surface == NULL ) {
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slouken@0
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SDL_OutOfMemory();
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slouken@0
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return(NULL);
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slouken@0
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}
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slouken@0
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surface->flags = SDL_SWSURFACE;
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slouken@0
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if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
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icculus@1052
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if ((Amask) && (video->displayformatalphapixel))
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{
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depth = video->displayformatalphapixel->BitsPerPixel;
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Rmask = video->displayformatalphapixel->Rmask;
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Gmask = video->displayformatalphapixel->Gmask;
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Bmask = video->displayformatalphapixel->Bmask;
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Amask = video->displayformatalphapixel->Amask;
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}
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else
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{
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depth = screen->format->BitsPerPixel;
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Rmask = screen->format->Rmask;
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icculus@1052
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Gmask = screen->format->Gmask;
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icculus@1052
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Bmask = screen->format->Bmask;
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icculus@1052
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Amask = screen->format->Amask;
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icculus@1052
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}
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slouken@0
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}
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slouken@0
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surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask);
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slouken@0
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if ( surface->format == NULL ) {
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slouken@1336
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SDL_free(surface);
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slouken@0
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return(NULL);
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slouken@0
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}
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slouken@0
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if ( Amask ) {
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slouken@0
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surface->flags |= SDL_SRCALPHA;
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slouken@0
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}
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slouken@0
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surface->w = width;
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slouken@0
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surface->h = height;
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slouken@0
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surface->pitch = SDL_CalculatePitch(surface);
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slouken@0
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surface->pixels = NULL;
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slouken@0
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surface->offset = 0;
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slouken@0
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surface->hwdata = NULL;
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slouken@0
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surface->locked = 0;
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slouken@0
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surface->map = NULL;
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slouken@441
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surface->unused1 = 0;
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slouken@0
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SDL_SetClipRect(surface, NULL);
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slouken@845
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SDL_FormatChanged(surface);
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slouken@0
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121 |
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slouken@0
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/* Get the pixels */
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slouken@0
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if ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) ||
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slouken@0
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(video->AllocHWSurface(this, surface) < 0) ) {
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slouken@0
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if ( surface->w && surface->h ) {
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slouken@1336
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surface->pixels = SDL_malloc(surface->h*surface->pitch);
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slouken@0
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127 |
if ( surface->pixels == NULL ) {
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slouken@0
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128 |
SDL_FreeSurface(surface);
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slouken@0
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129 |
SDL_OutOfMemory();
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slouken@0
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130 |
return(NULL);
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slouken@0
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131 |
}
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slouken@0
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132 |
/* This is important for bitmaps */
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slouken@1336
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133 |
SDL_memset(surface->pixels, 0, surface->h*surface->pitch);
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slouken@0
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}
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slouken@0
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}
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slouken@0
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136 |
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slouken@0
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137 |
/* Allocate an empty mapping */
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slouken@0
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surface->map = SDL_AllocBlitMap();
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slouken@0
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139 |
if ( surface->map == NULL ) {
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slouken@0
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SDL_FreeSurface(surface);
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slouken@0
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141 |
return(NULL);
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slouken@0
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142 |
}
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slouken@0
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143 |
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slouken@0
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144 |
/* The surface is ready to go */
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slouken@0
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145 |
surface->refcount = 1;
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slouken@0
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146 |
#ifdef CHECK_LEAKS
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slouken@0
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147 |
++surfaces_allocated;
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slouken@0
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148 |
#endif
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slouken@0
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149 |
return(surface);
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slouken@0
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150 |
}
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slouken@0
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151 |
/*
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slouken@0
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152 |
* Create an RGB surface from an existing memory buffer
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slouken@0
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153 |
*/
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slouken@0
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154 |
SDL_Surface * SDL_CreateRGBSurfaceFrom (void *pixels,
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slouken@0
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155 |
int width, int height, int depth, int pitch,
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slouken@0
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156 |
Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
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slouken@0
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{
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slouken@0
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158 |
SDL_Surface *surface;
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slouken@0
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159 |
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slouken@0
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160 |
surface = SDL_CreateRGBSurface(SDL_SWSURFACE, 0, 0, depth,
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slouken@0
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161 |
Rmask, Gmask, Bmask, Amask);
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slouken@0
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162 |
if ( surface != NULL ) {
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slouken@0
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163 |
surface->flags |= SDL_PREALLOC;
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slouken@0
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164 |
surface->pixels = pixels;
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slouken@0
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165 |
surface->w = width;
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slouken@0
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166 |
surface->h = height;
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slouken@0
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167 |
surface->pitch = pitch;
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slouken@0
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168 |
SDL_SetClipRect(surface, NULL);
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slouken@0
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169 |
}
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slouken@0
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170 |
return(surface);
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slouken@0
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171 |
}
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slouken@0
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172 |
/*
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slouken@0
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173 |
* Set the color key in a blittable surface
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slouken@0
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174 |
*/
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slouken@0
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175 |
int SDL_SetColorKey (SDL_Surface *surface, Uint32 flag, Uint32 key)
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slouken@0
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176 |
{
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slouken@0
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177 |
/* Sanity check the flag as it gets passed in */
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slouken@0
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178 |
if ( flag & SDL_SRCCOLORKEY ) {
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slouken@0
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179 |
if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) {
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slouken@0
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180 |
flag = (SDL_SRCCOLORKEY | SDL_RLEACCELOK);
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slouken@0
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181 |
} else {
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slouken@0
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182 |
flag = SDL_SRCCOLORKEY;
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slouken@0
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183 |
}
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slouken@0
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184 |
} else {
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slouken@0
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185 |
flag = 0;
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slouken@0
|
186 |
}
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slouken@0
|
187 |
|
slouken@0
|
188 |
/* Optimize away operations that don't change anything */
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slouken@0
|
189 |
if ( (flag == (surface->flags & (SDL_SRCCOLORKEY|SDL_RLEACCELOK))) &&
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slouken@0
|
190 |
(key == surface->format->colorkey) ) {
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slouken@0
|
191 |
return(0);
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slouken@0
|
192 |
}
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slouken@0
|
193 |
|
slouken@0
|
194 |
/* UnRLE surfaces before we change the colorkey */
|
slouken@0
|
195 |
if ( surface->flags & SDL_RLEACCEL ) {
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slouken@0
|
196 |
SDL_UnRLESurface(surface, 1);
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slouken@0
|
197 |
}
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slouken@0
|
198 |
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slouken@0
|
199 |
if ( flag ) {
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slouken@0
|
200 |
SDL_VideoDevice *video = current_video;
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slouken@0
|
201 |
SDL_VideoDevice *this = current_video;
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slouken@0
|
202 |
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slouken@0
|
203 |
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slouken@0
|
204 |
surface->flags |= SDL_SRCCOLORKEY;
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slouken@0
|
205 |
surface->format->colorkey = key;
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slouken@0
|
206 |
if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) {
|
slouken@0
|
207 |
if ( (video->SetHWColorKey == NULL) ||
|
slouken@0
|
208 |
(video->SetHWColorKey(this, surface, key) < 0) ) {
|
slouken@0
|
209 |
surface->flags &= ~SDL_HWACCEL;
|
slouken@0
|
210 |
}
|
slouken@0
|
211 |
}
|
slouken@0
|
212 |
if ( flag & SDL_RLEACCELOK ) {
|
slouken@0
|
213 |
surface->flags |= SDL_RLEACCELOK;
|
slouken@0
|
214 |
} else {
|
slouken@0
|
215 |
surface->flags &= ~SDL_RLEACCELOK;
|
slouken@0
|
216 |
}
|
slouken@0
|
217 |
} else {
|
slouken@0
|
218 |
surface->flags &= ~(SDL_SRCCOLORKEY|SDL_RLEACCELOK);
|
slouken@0
|
219 |
surface->format->colorkey = 0;
|
slouken@0
|
220 |
}
|
slouken@0
|
221 |
SDL_InvalidateMap(surface->map);
|
slouken@0
|
222 |
return(0);
|
slouken@0
|
223 |
}
|
slouken@431
|
224 |
/* This function sets the alpha channel of a surface */
|
slouken@0
|
225 |
int SDL_SetAlpha (SDL_Surface *surface, Uint32 flag, Uint8 value)
|
slouken@0
|
226 |
{
|
slouken@0
|
227 |
Uint32 oldflags = surface->flags;
|
slouken@0
|
228 |
Uint32 oldalpha = surface->format->alpha;
|
slouken@0
|
229 |
|
slouken@0
|
230 |
/* Sanity check the flag as it gets passed in */
|
slouken@0
|
231 |
if ( flag & SDL_SRCALPHA ) {
|
slouken@0
|
232 |
if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) {
|
slouken@0
|
233 |
flag = (SDL_SRCALPHA | SDL_RLEACCELOK);
|
slouken@0
|
234 |
} else {
|
slouken@0
|
235 |
flag = SDL_SRCALPHA;
|
slouken@0
|
236 |
}
|
slouken@0
|
237 |
} else {
|
slouken@0
|
238 |
flag = 0;
|
slouken@0
|
239 |
}
|
slouken@0
|
240 |
|
slouken@0
|
241 |
/* Optimize away operations that don't change anything */
|
slouken@0
|
242 |
if ( (flag == (surface->flags & (SDL_SRCALPHA|SDL_RLEACCELOK))) &&
|
slouken@0
|
243 |
(!flag || value == oldalpha) ) {
|
slouken@0
|
244 |
return(0);
|
slouken@0
|
245 |
}
|
slouken@0
|
246 |
|
slouken@0
|
247 |
if(!(flag & SDL_RLEACCELOK) && (surface->flags & SDL_RLEACCEL))
|
slouken@0
|
248 |
SDL_UnRLESurface(surface, 1);
|
slouken@0
|
249 |
|
slouken@0
|
250 |
if ( flag ) {
|
slouken@0
|
251 |
SDL_VideoDevice *video = current_video;
|
slouken@0
|
252 |
SDL_VideoDevice *this = current_video;
|
slouken@0
|
253 |
|
slouken@0
|
254 |
surface->flags |= SDL_SRCALPHA;
|
slouken@0
|
255 |
surface->format->alpha = value;
|
slouken@0
|
256 |
if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) {
|
slouken@0
|
257 |
if ( (video->SetHWAlpha == NULL) ||
|
slouken@0
|
258 |
(video->SetHWAlpha(this, surface, value) < 0) ) {
|
slouken@0
|
259 |
surface->flags &= ~SDL_HWACCEL;
|
slouken@0
|
260 |
}
|
slouken@0
|
261 |
}
|
slouken@0
|
262 |
if ( flag & SDL_RLEACCELOK ) {
|
slouken@0
|
263 |
surface->flags |= SDL_RLEACCELOK;
|
slouken@0
|
264 |
} else {
|
slouken@0
|
265 |
surface->flags &= ~SDL_RLEACCELOK;
|
slouken@0
|
266 |
}
|
slouken@0
|
267 |
} else {
|
slouken@0
|
268 |
surface->flags &= ~SDL_SRCALPHA;
|
slouken@0
|
269 |
surface->format->alpha = SDL_ALPHA_OPAQUE;
|
slouken@0
|
270 |
}
|
slouken@0
|
271 |
/*
|
slouken@0
|
272 |
* The representation for software surfaces is independent of
|
slouken@0
|
273 |
* per-surface alpha, so no need to invalidate the blit mapping
|
slouken@0
|
274 |
* if just the alpha value was changed. (If either is 255, we still
|
slouken@0
|
275 |
* need to invalidate.)
|
slouken@0
|
276 |
*/
|
slouken@0
|
277 |
if((surface->flags & SDL_HWACCEL) == SDL_HWACCEL
|
slouken@0
|
278 |
|| oldflags != surface->flags
|
slouken@0
|
279 |
|| (((oldalpha + 1) ^ (value + 1)) & 0x100))
|
slouken@0
|
280 |
SDL_InvalidateMap(surface->map);
|
slouken@0
|
281 |
return(0);
|
slouken@0
|
282 |
}
|
slouken@431
|
283 |
int SDL_SetAlphaChannel(SDL_Surface *surface, Uint8 value)
|
slouken@431
|
284 |
{
|
slouken@431
|
285 |
int row, col;
|
slouken@431
|
286 |
int offset;
|
slouken@431
|
287 |
Uint8 *buf;
|
slouken@431
|
288 |
|
slouken@431
|
289 |
if ( (surface->format->Amask != 0xFF000000) &&
|
slouken@431
|
290 |
(surface->format->Amask != 0x000000FF) ) {
|
slouken@431
|
291 |
SDL_SetError("Unsupported surface alpha mask format");
|
slouken@431
|
292 |
return -1;
|
slouken@431
|
293 |
}
|
slouken@431
|
294 |
|
slouken@431
|
295 |
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
|
slouken@431
|
296 |
if ( surface->format->Amask == 0xFF000000 ) {
|
slouken@431
|
297 |
offset = 3;
|
slouken@431
|
298 |
} else {
|
slouken@431
|
299 |
offset = 0;
|
slouken@431
|
300 |
}
|
slouken@431
|
301 |
#else
|
slouken@431
|
302 |
if ( surface->format->Amask == 0xFF000000 ) {
|
slouken@431
|
303 |
offset = 0;
|
slouken@431
|
304 |
} else {
|
slouken@431
|
305 |
offset = 3;
|
slouken@431
|
306 |
}
|
slouken@431
|
307 |
#endif /* Byte ordering */
|
slouken@431
|
308 |
|
slouken@431
|
309 |
/* Quickly set the alpha channel of an RGBA or ARGB surface */
|
slouken@431
|
310 |
if ( SDL_MUSTLOCK(surface) ) {
|
slouken@431
|
311 |
if ( SDL_LockSurface(surface) < 0 ) {
|
slouken@431
|
312 |
return -1;
|
slouken@431
|
313 |
}
|
slouken@431
|
314 |
}
|
slouken@431
|
315 |
row = surface->h;
|
slouken@431
|
316 |
while (row--) {
|
slouken@431
|
317 |
col = surface->w;
|
slouken@431
|
318 |
buf = (Uint8 *)surface->pixels + row * surface->pitch + offset;
|
slouken@431
|
319 |
while(col--) {
|
slouken@431
|
320 |
*buf = value;
|
slouken@431
|
321 |
buf += 4;
|
slouken@431
|
322 |
}
|
slouken@431
|
323 |
}
|
slouken@431
|
324 |
if ( SDL_MUSTLOCK(surface) ) {
|
slouken@431
|
325 |
SDL_UnlockSurface(surface);
|
slouken@431
|
326 |
}
|
slouken@431
|
327 |
return 0;
|
slouken@431
|
328 |
}
|
slouken@0
|
329 |
|
slouken@0
|
330 |
/*
|
slouken@0
|
331 |
* A function to calculate the intersection of two rectangles:
|
slouken@0
|
332 |
* return true if the rectangles intersect, false otherwise
|
slouken@0
|
333 |
*/
|
slouken@0
|
334 |
static __inline__
|
slouken@130
|
335 |
SDL_bool SDL_IntersectRect(const SDL_Rect *A, const SDL_Rect *B, SDL_Rect *intersection)
|
slouken@0
|
336 |
{
|
slouken@0
|
337 |
int Amin, Amax, Bmin, Bmax;
|
slouken@0
|
338 |
|
slouken@0
|
339 |
/* Horizontal intersection */
|
slouken@0
|
340 |
Amin = A->x;
|
slouken@0
|
341 |
Amax = Amin + A->w;
|
slouken@0
|
342 |
Bmin = B->x;
|
slouken@0
|
343 |
Bmax = Bmin + B->w;
|
slouken@0
|
344 |
if(Bmin > Amin)
|
slouken@0
|
345 |
Amin = Bmin;
|
slouken@0
|
346 |
intersection->x = Amin;
|
slouken@0
|
347 |
if(Bmax < Amax)
|
slouken@0
|
348 |
Amax = Bmax;
|
slouken@0
|
349 |
intersection->w = Amax - Amin > 0 ? Amax - Amin : 0;
|
slouken@0
|
350 |
|
slouken@0
|
351 |
/* Vertical intersection */
|
slouken@0
|
352 |
Amin = A->y;
|
slouken@0
|
353 |
Amax = Amin + A->h;
|
slouken@0
|
354 |
Bmin = B->y;
|
slouken@0
|
355 |
Bmax = Bmin + B->h;
|
slouken@0
|
356 |
if(Bmin > Amin)
|
slouken@0
|
357 |
Amin = Bmin;
|
slouken@0
|
358 |
intersection->y = Amin;
|
slouken@0
|
359 |
if(Bmax < Amax)
|
slouken@0
|
360 |
Amax = Bmax;
|
slouken@0
|
361 |
intersection->h = Amax - Amin > 0 ? Amax - Amin : 0;
|
slouken@0
|
362 |
|
slouken@0
|
363 |
return (intersection->w && intersection->h);
|
slouken@0
|
364 |
}
|
slouken@0
|
365 |
/*
|
slouken@0
|
366 |
* Set the clipping rectangle for a blittable surface
|
slouken@0
|
367 |
*/
|
slouken@130
|
368 |
SDL_bool SDL_SetClipRect(SDL_Surface *surface, const SDL_Rect *rect)
|
slouken@0
|
369 |
{
|
slouken@0
|
370 |
SDL_Rect full_rect;
|
slouken@0
|
371 |
|
slouken@0
|
372 |
/* Don't do anything if there's no surface to act on */
|
slouken@0
|
373 |
if ( ! surface ) {
|
slouken@0
|
374 |
return SDL_FALSE;
|
slouken@0
|
375 |
}
|
slouken@0
|
376 |
|
slouken@0
|
377 |
/* Set up the full surface rectangle */
|
slouken@0
|
378 |
full_rect.x = 0;
|
slouken@0
|
379 |
full_rect.y = 0;
|
slouken@0
|
380 |
full_rect.w = surface->w;
|
slouken@0
|
381 |
full_rect.h = surface->h;
|
slouken@0
|
382 |
|
slouken@0
|
383 |
/* Set the clipping rectangle */
|
slouken@0
|
384 |
if ( ! rect ) {
|
slouken@0
|
385 |
surface->clip_rect = full_rect;
|
slouken@0
|
386 |
return 1;
|
slouken@0
|
387 |
}
|
slouken@0
|
388 |
return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect);
|
slouken@0
|
389 |
}
|
slouken@0
|
390 |
void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect)
|
slouken@0
|
391 |
{
|
slouken@0
|
392 |
if ( surface && rect ) {
|
slouken@0
|
393 |
*rect = surface->clip_rect;
|
slouken@0
|
394 |
}
|
slouken@0
|
395 |
}
|
slouken@0
|
396 |
/*
|
slouken@0
|
397 |
* Set up a blit between two surfaces -- split into three parts:
|
slouken@0
|
398 |
* The upper part, SDL_UpperBlit(), performs clipping and rectangle
|
slouken@0
|
399 |
* verification. The lower part is a pointer to a low level
|
slouken@0
|
400 |
* accelerated blitting function.
|
slouken@0
|
401 |
*
|
slouken@0
|
402 |
* These parts are separated out and each used internally by this
|
slouken@0
|
403 |
* library in the optimimum places. They are exported so that if
|
slouken@0
|
404 |
* you know exactly what you are doing, you can optimize your code
|
slouken@0
|
405 |
* by calling the one(s) you need.
|
slouken@0
|
406 |
*/
|
slouken@0
|
407 |
int SDL_LowerBlit (SDL_Surface *src, SDL_Rect *srcrect,
|
slouken@0
|
408 |
SDL_Surface *dst, SDL_Rect *dstrect)
|
slouken@0
|
409 |
{
|
slouken@0
|
410 |
SDL_blit do_blit;
|
slouken@462
|
411 |
SDL_Rect hw_srcrect;
|
slouken@462
|
412 |
SDL_Rect hw_dstrect;
|
slouken@0
|
413 |
|
slouken@0
|
414 |
/* Check to make sure the blit mapping is valid */
|
slouken@0
|
415 |
if ( (src->map->dst != dst) ||
|
slouken@0
|
416 |
(src->map->dst->format_version != src->map->format_version) ) {
|
slouken@0
|
417 |
if ( SDL_MapSurface(src, dst) < 0 ) {
|
slouken@0
|
418 |
return(-1);
|
slouken@0
|
419 |
}
|
slouken@0
|
420 |
}
|
slouken@0
|
421 |
|
slouken@0
|
422 |
/* Figure out which blitter to use */
|
slouken@0
|
423 |
if ( (src->flags & SDL_HWACCEL) == SDL_HWACCEL ) {
|
slouken@462
|
424 |
if ( src == SDL_VideoSurface ) {
|
slouken@519
|
425 |
hw_srcrect = *srcrect;
|
slouken@462
|
426 |
hw_srcrect.x += current_video->offset_x;
|
slouken@462
|
427 |
hw_srcrect.y += current_video->offset_y;
|
slouken@462
|
428 |
srcrect = &hw_srcrect;
|
slouken@462
|
429 |
}
|
slouken@462
|
430 |
if ( dst == SDL_VideoSurface ) {
|
slouken@462
|
431 |
hw_dstrect = *dstrect;
|
slouken@462
|
432 |
hw_dstrect.x += current_video->offset_x;
|
slouken@462
|
433 |
hw_dstrect.y += current_video->offset_y;
|
slouken@462
|
434 |
dstrect = &hw_dstrect;
|
slouken@462
|
435 |
}
|
slouken@0
|
436 |
do_blit = src->map->hw_blit;
|
slouken@0
|
437 |
} else {
|
slouken@0
|
438 |
do_blit = src->map->sw_blit;
|
slouken@0
|
439 |
}
|
slouken@0
|
440 |
return(do_blit(src, srcrect, dst, dstrect));
|
slouken@0
|
441 |
}
|
slouken@0
|
442 |
|
slouken@0
|
443 |
|
slouken@0
|
444 |
int SDL_UpperBlit (SDL_Surface *src, SDL_Rect *srcrect,
|
slouken@0
|
445 |
SDL_Surface *dst, SDL_Rect *dstrect)
|
slouken@0
|
446 |
{
|
slouken@0
|
447 |
SDL_Rect fulldst;
|
slouken@0
|
448 |
int srcx, srcy, w, h;
|
slouken@0
|
449 |
|
slouken@0
|
450 |
/* Make sure the surfaces aren't locked */
|
slouken@0
|
451 |
if ( ! src || ! dst ) {
|
slouken@0
|
452 |
SDL_SetError("SDL_UpperBlit: passed a NULL surface");
|
slouken@0
|
453 |
return(-1);
|
slouken@0
|
454 |
}
|
slouken@0
|
455 |
if ( src->locked || dst->locked ) {
|
slouken@0
|
456 |
SDL_SetError("Surfaces must not be locked during blit");
|
slouken@0
|
457 |
return(-1);
|
slouken@0
|
458 |
}
|
slouken@0
|
459 |
|
slouken@0
|
460 |
/* If the destination rectangle is NULL, use the entire dest surface */
|
slouken@0
|
461 |
if ( dstrect == NULL ) {
|
slouken@0
|
462 |
fulldst.x = fulldst.y = 0;
|
slouken@0
|
463 |
dstrect = &fulldst;
|
slouken@0
|
464 |
}
|
slouken@0
|
465 |
|
slouken@0
|
466 |
/* clip the source rectangle to the source surface */
|
slouken@0
|
467 |
if(srcrect) {
|
slouken@0
|
468 |
int maxw, maxh;
|
slouken@0
|
469 |
|
slouken@0
|
470 |
srcx = srcrect->x;
|
slouken@0
|
471 |
w = srcrect->w;
|
slouken@0
|
472 |
if(srcx < 0) {
|
slouken@0
|
473 |
w += srcx;
|
slouken@0
|
474 |
dstrect->x -= srcx;
|
slouken@0
|
475 |
srcx = 0;
|
slouken@0
|
476 |
}
|
slouken@0
|
477 |
maxw = src->w - srcx;
|
slouken@0
|
478 |
if(maxw < w)
|
slouken@0
|
479 |
w = maxw;
|
slouken@0
|
480 |
|
slouken@0
|
481 |
srcy = srcrect->y;
|
slouken@0
|
482 |
h = srcrect->h;
|
slouken@0
|
483 |
if(srcy < 0) {
|
slouken@0
|
484 |
h += srcy;
|
slouken@0
|
485 |
dstrect->y -= srcy;
|
slouken@0
|
486 |
srcy = 0;
|
slouken@0
|
487 |
}
|
slouken@0
|
488 |
maxh = src->h - srcy;
|
slouken@0
|
489 |
if(maxh < h)
|
slouken@0
|
490 |
h = maxh;
|
slouken@0
|
491 |
|
slouken@0
|
492 |
} else {
|
slouken@0
|
493 |
srcx = srcy = 0;
|
slouken@0
|
494 |
w = src->w;
|
slouken@0
|
495 |
h = src->h;
|
slouken@0
|
496 |
}
|
slouken@0
|
497 |
|
slouken@0
|
498 |
/* clip the destination rectangle against the clip rectangle */
|
slouken@0
|
499 |
{
|
slouken@0
|
500 |
SDL_Rect *clip = &dst->clip_rect;
|
slouken@0
|
501 |
int dx, dy;
|
slouken@0
|
502 |
|
slouken@0
|
503 |
dx = clip->x - dstrect->x;
|
slouken@0
|
504 |
if(dx > 0) {
|
slouken@0
|
505 |
w -= dx;
|
slouken@0
|
506 |
dstrect->x += dx;
|
slouken@0
|
507 |
srcx += dx;
|
slouken@0
|
508 |
}
|
slouken@0
|
509 |
dx = dstrect->x + w - clip->x - clip->w;
|
slouken@0
|
510 |
if(dx > 0)
|
slouken@0
|
511 |
w -= dx;
|
slouken@0
|
512 |
|
slouken@0
|
513 |
dy = clip->y - dstrect->y;
|
slouken@0
|
514 |
if(dy > 0) {
|
slouken@0
|
515 |
h -= dy;
|
slouken@0
|
516 |
dstrect->y += dy;
|
slouken@0
|
517 |
srcy += dy;
|
slouken@0
|
518 |
}
|
slouken@0
|
519 |
dy = dstrect->y + h - clip->y - clip->h;
|
slouken@0
|
520 |
if(dy > 0)
|
slouken@0
|
521 |
h -= dy;
|
slouken@0
|
522 |
}
|
slouken@0
|
523 |
|
slouken@0
|
524 |
if(w > 0 && h > 0) {
|
slouken@0
|
525 |
SDL_Rect sr;
|
slouken@0
|
526 |
sr.x = srcx;
|
slouken@0
|
527 |
sr.y = srcy;
|
slouken@0
|
528 |
sr.w = dstrect->w = w;
|
slouken@0
|
529 |
sr.h = dstrect->h = h;
|
slouken@0
|
530 |
return SDL_LowerBlit(src, &sr, dst, dstrect);
|
slouken@0
|
531 |
}
|
slouken@0
|
532 |
dstrect->w = dstrect->h = 0;
|
slouken@0
|
533 |
return 0;
|
slouken@0
|
534 |
}
|
slouken@0
|
535 |
|
slouken@532
|
536 |
static int SDL_FillRect1(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color)
|
slouken@532
|
537 |
{
|
slouken@532
|
538 |
/* FIXME: We have to worry about packing order.. *sigh* */
|
slouken@532
|
539 |
SDL_SetError("1-bpp rect fill not yet implemented");
|
slouken@532
|
540 |
return -1;
|
slouken@532
|
541 |
}
|
slouken@532
|
542 |
|
slouken@532
|
543 |
static int SDL_FillRect4(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color)
|
slouken@532
|
544 |
{
|
slouken@532
|
545 |
/* FIXME: We have to worry about packing order.. *sigh* */
|
slouken@532
|
546 |
SDL_SetError("4-bpp rect fill not yet implemented");
|
slouken@532
|
547 |
return -1;
|
slouken@532
|
548 |
}
|
slouken@532
|
549 |
|
slouken@0
|
550 |
/*
|
slouken@0
|
551 |
* This function performs a fast fill of the given rectangle with 'color'
|
slouken@0
|
552 |
*/
|
slouken@0
|
553 |
int SDL_FillRect(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color)
|
slouken@0
|
554 |
{
|
slouken@0
|
555 |
SDL_VideoDevice *video = current_video;
|
slouken@0
|
556 |
SDL_VideoDevice *this = current_video;
|
slouken@0
|
557 |
int x, y;
|
slouken@0
|
558 |
Uint8 *row;
|
slouken@0
|
559 |
|
slouken@532
|
560 |
/* This function doesn't work on surfaces < 8 bpp */
|
slouken@532
|
561 |
if ( dst->format->BitsPerPixel < 8 ) {
|
slouken@532
|
562 |
switch(dst->format->BitsPerPixel) {
|
slouken@532
|
563 |
case 1:
|
slouken@532
|
564 |
return SDL_FillRect1(dst, dstrect, color);
|
slouken@532
|
565 |
break;
|
slouken@532
|
566 |
case 4:
|
slouken@532
|
567 |
return SDL_FillRect4(dst, dstrect, color);
|
slouken@532
|
568 |
break;
|
slouken@532
|
569 |
default:
|
slouken@532
|
570 |
SDL_SetError("Fill rect on unsupported surface format");
|
slouken@532
|
571 |
return(-1);
|
slouken@532
|
572 |
break;
|
slouken@532
|
573 |
}
|
slouken@532
|
574 |
}
|
slouken@532
|
575 |
|
slouken@0
|
576 |
/* If 'dstrect' == NULL, then fill the whole surface */
|
slouken@0
|
577 |
if ( dstrect ) {
|
slouken@0
|
578 |
/* Perform clipping */
|
slouken@0
|
579 |
if ( !SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect) ) {
|
slouken@0
|
580 |
return(0);
|
slouken@0
|
581 |
}
|
slouken@0
|
582 |
} else {
|
slouken@0
|
583 |
dstrect = &dst->clip_rect;
|
slouken@0
|
584 |
}
|
slouken@0
|
585 |
|
slouken@0
|
586 |
/* Check for hardware acceleration */
|
slouken@0
|
587 |
if ( ((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) &&
|
slouken@0
|
588 |
video->info.blit_fill ) {
|
slouken@462
|
589 |
SDL_Rect hw_rect;
|
slouken@462
|
590 |
if ( dst == SDL_VideoSurface ) {
|
slouken@462
|
591 |
hw_rect = *dstrect;
|
slouken@462
|
592 |
hw_rect.x += current_video->offset_x;
|
slouken@462
|
593 |
hw_rect.y += current_video->offset_y;
|
slouken@462
|
594 |
dstrect = &hw_rect;
|
slouken@462
|
595 |
}
|
slouken@0
|
596 |
return(video->FillHWRect(this, dst, dstrect, color));
|
slouken@0
|
597 |
}
|
slouken@0
|
598 |
|
slouken@0
|
599 |
/* Perform software fill */
|
slouken@0
|
600 |
if ( SDL_LockSurface(dst) != 0 ) {
|
slouken@0
|
601 |
return(-1);
|
slouken@0
|
602 |
}
|
slouken@0
|
603 |
row = (Uint8 *)dst->pixels+dstrect->y*dst->pitch+
|
slouken@0
|
604 |
dstrect->x*dst->format->BytesPerPixel;
|
slouken@0
|
605 |
if ( dst->format->palette || (color == 0) ) {
|
slouken@0
|
606 |
x = dstrect->w*dst->format->BytesPerPixel;
|
slouken@0
|
607 |
if ( !color && !((long)row&3) && !(x&3) && !(dst->pitch&3) ) {
|
slouken@0
|
608 |
int n = x >> 2;
|
slouken@0
|
609 |
for ( y=dstrect->h; y; --y ) {
|
slouken@0
|
610 |
SDL_memset4(row, 0, n);
|
slouken@0
|
611 |
row += dst->pitch;
|
slouken@0
|
612 |
}
|
slouken@0
|
613 |
} else {
|
slouken@0
|
614 |
#ifdef __powerpc__
|
slouken@0
|
615 |
/*
|
slouken@1336
|
616 |
* SDL_memset() on PPC (both glibc and codewarrior) uses
|
slouken@0
|
617 |
* the dcbz (Data Cache Block Zero) instruction, which
|
slouken@0
|
618 |
* causes an alignment exception if the destination is
|
slouken@0
|
619 |
* uncachable, so only use it on software surfaces
|
slouken@0
|
620 |
*/
|
slouken@0
|
621 |
if((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) {
|
slouken@0
|
622 |
if(dstrect->w >= 8) {
|
slouken@0
|
623 |
/*
|
slouken@0
|
624 |
* 64-bit stores are probably most
|
slouken@0
|
625 |
* efficient to uncached video memory
|
slouken@0
|
626 |
*/
|
slouken@0
|
627 |
double fill;
|
slouken@1336
|
628 |
SDL_memset(&fill, color, (sizeof fill));
|
slouken@0
|
629 |
for(y = dstrect->h; y; y--) {
|
slouken@0
|
630 |
Uint8 *d = row;
|
slouken@0
|
631 |
unsigned n = x;
|
slouken@0
|
632 |
unsigned nn;
|
slouken@0
|
633 |
Uint8 c = color;
|
slouken@0
|
634 |
double f = fill;
|
slouken@0
|
635 |
while((unsigned long)d
|
slouken@0
|
636 |
& (sizeof(double) - 1)) {
|
slouken@0
|
637 |
*d++ = c;
|
slouken@0
|
638 |
n--;
|
slouken@0
|
639 |
}
|
slouken@0
|
640 |
nn = n / (sizeof(double) * 4);
|
slouken@0
|
641 |
while(nn) {
|
slouken@0
|
642 |
((double *)d)[0] = f;
|
slouken@0
|
643 |
((double *)d)[1] = f;
|
slouken@0
|
644 |
((double *)d)[2] = f;
|
slouken@0
|
645 |
((double *)d)[3] = f;
|
slouken@0
|
646 |
d += 4*sizeof(double);
|
slouken@0
|
647 |
nn--;
|
slouken@0
|
648 |
}
|
slouken@0
|
649 |
n &= ~(sizeof(double) * 4 - 1);
|
slouken@0
|
650 |
nn = n / sizeof(double);
|
slouken@0
|
651 |
while(nn) {
|
slouken@0
|
652 |
*(double *)d = f;
|
slouken@0
|
653 |
d += sizeof(double);
|
slouken@0
|
654 |
nn--;
|
slouken@0
|
655 |
}
|
slouken@0
|
656 |
n &= ~(sizeof(double) - 1);
|
slouken@0
|
657 |
while(n) {
|
slouken@0
|
658 |
*d++ = c;
|
slouken@0
|
659 |
n--;
|
slouken@0
|
660 |
}
|
slouken@0
|
661 |
row += dst->pitch;
|
slouken@0
|
662 |
}
|
slouken@0
|
663 |
} else {
|
slouken@0
|
664 |
/* narrow boxes */
|
slouken@0
|
665 |
for(y = dstrect->h; y; y--) {
|
slouken@0
|
666 |
Uint8 *d = row;
|
slouken@0
|
667 |
Uint8 c = color;
|
slouken@0
|
668 |
int n = x;
|
slouken@0
|
669 |
while(n) {
|
slouken@0
|
670 |
*d++ = c;
|
slouken@0
|
671 |
n--;
|
slouken@0
|
672 |
}
|
slouken@0
|
673 |
row += dst->pitch;
|
slouken@0
|
674 |
}
|
slouken@0
|
675 |
}
|
slouken@0
|
676 |
} else
|
slouken@0
|
677 |
#endif /* __powerpc__ */
|
slouken@0
|
678 |
{
|
slouken@0
|
679 |
for(y = dstrect->h; y; y--) {
|
slouken@1336
|
680 |
SDL_memset(row, color, x);
|
slouken@0
|
681 |
row += dst->pitch;
|
slouken@0
|
682 |
}
|
slouken@0
|
683 |
}
|
slouken@0
|
684 |
}
|
slouken@0
|
685 |
} else {
|
slouken@0
|
686 |
switch (dst->format->BytesPerPixel) {
|
slouken@0
|
687 |
case 2:
|
slouken@0
|
688 |
for ( y=dstrect->h; y; --y ) {
|
slouken@0
|
689 |
Uint16 *pixels = (Uint16 *)row;
|
slouken@0
|
690 |
Uint16 c = color;
|
slouken@0
|
691 |
Uint32 cc = (Uint32)c << 16 | c;
|
slouken@0
|
692 |
int n = dstrect->w;
|
slouken@0
|
693 |
if((unsigned long)pixels & 3) {
|
slouken@0
|
694 |
*pixels++ = c;
|
slouken@0
|
695 |
n--;
|
slouken@0
|
696 |
}
|
slouken@0
|
697 |
if(n >> 1)
|
slouken@0
|
698 |
SDL_memset4(pixels, cc, n >> 1);
|
slouken@0
|
699 |
if(n & 1)
|
slouken@0
|
700 |
pixels[n - 1] = c;
|
slouken@0
|
701 |
row += dst->pitch;
|
slouken@0
|
702 |
}
|
slouken@0
|
703 |
break;
|
slouken@0
|
704 |
|
slouken@0
|
705 |
case 3:
|
icculus@1155
|
706 |
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
|
slouken@0
|
707 |
color <<= 8;
|
icculus@1155
|
708 |
#endif
|
slouken@0
|
709 |
for ( y=dstrect->h; y; --y ) {
|
slouken@0
|
710 |
Uint8 *pixels = row;
|
slouken@0
|
711 |
for ( x=dstrect->w; x; --x ) {
|
slouken@1336
|
712 |
SDL_memcpy(pixels, &color, 3);
|
slouken@0
|
713 |
pixels += 3;
|
slouken@0
|
714 |
}
|
slouken@0
|
715 |
row += dst->pitch;
|
slouken@0
|
716 |
}
|
slouken@0
|
717 |
break;
|
slouken@0
|
718 |
|
slouken@0
|
719 |
case 4:
|
slouken@0
|
720 |
for(y = dstrect->h; y; --y) {
|
slouken@0
|
721 |
SDL_memset4(row, color, dstrect->w);
|
slouken@0
|
722 |
row += dst->pitch;
|
slouken@0
|
723 |
}
|
slouken@0
|
724 |
break;
|
slouken@0
|
725 |
}
|
slouken@0
|
726 |
}
|
slouken@0
|
727 |
SDL_UnlockSurface(dst);
|
slouken@0
|
728 |
|
slouken@0
|
729 |
/* We're done! */
|
slouken@0
|
730 |
return(0);
|
slouken@0
|
731 |
}
|
slouken@0
|
732 |
|
slouken@0
|
733 |
/*
|
slouken@0
|
734 |
* Lock a surface to directly access the pixels
|
slouken@0
|
735 |
*/
|
slouken@0
|
736 |
int SDL_LockSurface (SDL_Surface *surface)
|
slouken@0
|
737 |
{
|
slouken@0
|
738 |
if ( ! surface->locked ) {
|
slouken@0
|
739 |
/* Perform the lock */
|
slouken@0
|
740 |
if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) {
|
slouken@0
|
741 |
SDL_VideoDevice *video = current_video;
|
slouken@0
|
742 |
SDL_VideoDevice *this = current_video;
|
slouken@0
|
743 |
if ( video->LockHWSurface(this, surface) < 0 ) {
|
slouken@0
|
744 |
return(-1);
|
slouken@0
|
745 |
}
|
slouken@0
|
746 |
}
|
slouken@0
|
747 |
if ( surface->flags & SDL_RLEACCEL ) {
|
slouken@0
|
748 |
SDL_UnRLESurface(surface, 1);
|
slouken@0
|
749 |
surface->flags |= SDL_RLEACCEL; /* save accel'd state */
|
slouken@0
|
750 |
}
|
slouken@0
|
751 |
/* This needs to be done here in case pixels changes value */
|
slouken@0
|
752 |
surface->pixels = (Uint8 *)surface->pixels + surface->offset;
|
slouken@0
|
753 |
}
|
slouken@0
|
754 |
|
slouken@0
|
755 |
/* Increment the surface lock count, for recursive locks */
|
slouken@0
|
756 |
++surface->locked;
|
slouken@0
|
757 |
|
slouken@0
|
758 |
/* Ready to go.. */
|
slouken@0
|
759 |
return(0);
|
slouken@0
|
760 |
}
|
slouken@0
|
761 |
/*
|
slouken@0
|
762 |
* Unlock a previously locked surface
|
slouken@0
|
763 |
*/
|
slouken@0
|
764 |
void SDL_UnlockSurface (SDL_Surface *surface)
|
slouken@0
|
765 |
{
|
slouken@0
|
766 |
/* Only perform an unlock if we are locked */
|
slouken@0
|
767 |
if ( ! surface->locked || (--surface->locked > 0) ) {
|
slouken@0
|
768 |
return;
|
slouken@0
|
769 |
}
|
slouken@0
|
770 |
|
slouken@0
|
771 |
/* Perform the unlock */
|
slouken@0
|
772 |
surface->pixels = (Uint8 *)surface->pixels - surface->offset;
|
slouken@0
|
773 |
|
slouken@0
|
774 |
/* Unlock hardware or accelerated surfaces */
|
slouken@0
|
775 |
if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) {
|
slouken@0
|
776 |
SDL_VideoDevice *video = current_video;
|
slouken@0
|
777 |
SDL_VideoDevice *this = current_video;
|
slouken@0
|
778 |
video->UnlockHWSurface(this, surface);
|
slouken@0
|
779 |
} else {
|
slouken@0
|
780 |
/* Update RLE encoded surface with new data */
|
slouken@0
|
781 |
if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) {
|
slouken@0
|
782 |
surface->flags &= ~SDL_RLEACCEL; /* stop lying */
|
slouken@0
|
783 |
SDL_RLESurface(surface);
|
slouken@0
|
784 |
}
|
slouken@0
|
785 |
}
|
slouken@0
|
786 |
}
|
slouken@0
|
787 |
|
slouken@0
|
788 |
/*
|
slouken@0
|
789 |
* Convert a surface into the specified pixel format.
|
slouken@0
|
790 |
*/
|
slouken@0
|
791 |
SDL_Surface * SDL_ConvertSurface (SDL_Surface *surface,
|
slouken@0
|
792 |
SDL_PixelFormat *format, Uint32 flags)
|
slouken@0
|
793 |
{
|
slouken@0
|
794 |
SDL_Surface *convert;
|
slouken@0
|
795 |
Uint32 colorkey = 0;
|
slouken@0
|
796 |
Uint8 alpha = 0;
|
slouken@0
|
797 |
Uint32 surface_flags;
|
slouken@0
|
798 |
SDL_Rect bounds;
|
slouken@0
|
799 |
|
slouken@0
|
800 |
/* Check for empty destination palette! (results in empty image) */
|
slouken@0
|
801 |
if ( format->palette != NULL ) {
|
slouken@0
|
802 |
int i;
|
slouken@0
|
803 |
for ( i=0; i<format->palette->ncolors; ++i ) {
|
slouken@0
|
804 |
if ( (format->palette->colors[i].r != 0) ||
|
slouken@0
|
805 |
(format->palette->colors[i].g != 0) ||
|
slouken@0
|
806 |
(format->palette->colors[i].b != 0) )
|
slouken@0
|
807 |
break;
|
slouken@0
|
808 |
}
|
slouken@0
|
809 |
if ( i == format->palette->ncolors ) {
|
slouken@0
|
810 |
SDL_SetError("Empty destination palette");
|
slouken@0
|
811 |
return(NULL);
|
slouken@0
|
812 |
}
|
slouken@0
|
813 |
}
|
slouken@0
|
814 |
|
slouken@264
|
815 |
/* Only create hw surfaces with alpha channel if hw alpha blits
|
slouken@264
|
816 |
are supported */
|
slouken@264
|
817 |
if(format->Amask != 0 && (flags & SDL_HWSURFACE)) {
|
slouken@264
|
818 |
const SDL_VideoInfo *vi = SDL_GetVideoInfo();
|
slouken@264
|
819 |
if(!vi || !vi->blit_hw_A)
|
slouken@264
|
820 |
flags &= ~SDL_HWSURFACE;
|
slouken@264
|
821 |
}
|
slouken@264
|
822 |
|
slouken@0
|
823 |
/* Create a new surface with the desired format */
|
slouken@0
|
824 |
convert = SDL_CreateRGBSurface(flags,
|
slouken@0
|
825 |
surface->w, surface->h, format->BitsPerPixel,
|
slouken@0
|
826 |
format->Rmask, format->Gmask, format->Bmask, format->Amask);
|
slouken@0
|
827 |
if ( convert == NULL ) {
|
slouken@0
|
828 |
return(NULL);
|
slouken@0
|
829 |
}
|
slouken@0
|
830 |
|
slouken@0
|
831 |
/* Copy the palette if any */
|
slouken@0
|
832 |
if ( format->palette && convert->format->palette ) {
|
slouken@1336
|
833 |
SDL_memcpy(convert->format->palette->colors,
|
slouken@0
|
834 |
format->palette->colors,
|
slouken@0
|
835 |
format->palette->ncolors*sizeof(SDL_Color));
|
slouken@0
|
836 |
convert->format->palette->ncolors = format->palette->ncolors;
|
slouken@0
|
837 |
}
|
slouken@0
|
838 |
|
slouken@0
|
839 |
/* Save the original surface color key and alpha */
|
slouken@0
|
840 |
surface_flags = surface->flags;
|
slouken@0
|
841 |
if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
|
slouken@0
|
842 |
/* Convert colourkeyed surfaces to RGBA if requested */
|
slouken@0
|
843 |
if((flags & SDL_SRCCOLORKEY) != SDL_SRCCOLORKEY
|
slouken@0
|
844 |
&& format->Amask) {
|
slouken@0
|
845 |
surface_flags &= ~SDL_SRCCOLORKEY;
|
slouken@0
|
846 |
} else {
|
slouken@0
|
847 |
colorkey = surface->format->colorkey;
|
slouken@0
|
848 |
SDL_SetColorKey(surface, 0, 0);
|
slouken@0
|
849 |
}
|
slouken@0
|
850 |
}
|
slouken@0
|
851 |
if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
|
slouken@431
|
852 |
/* Copy over the alpha channel to RGBA if requested */
|
slouken@431
|
853 |
if ( format->Amask ) {
|
slouken@431
|
854 |
surface->flags &= ~SDL_SRCALPHA;
|
slouken@431
|
855 |
} else {
|
slouken@431
|
856 |
alpha = surface->format->alpha;
|
slouken@431
|
857 |
SDL_SetAlpha(surface, 0, 0);
|
slouken@431
|
858 |
}
|
slouken@0
|
859 |
}
|
slouken@0
|
860 |
|
slouken@0
|
861 |
/* Copy over the image data */
|
slouken@0
|
862 |
bounds.x = 0;
|
slouken@0
|
863 |
bounds.y = 0;
|
slouken@0
|
864 |
bounds.w = surface->w;
|
slouken@0
|
865 |
bounds.h = surface->h;
|
slouken@0
|
866 |
SDL_LowerBlit(surface, &bounds, convert, &bounds);
|
slouken@0
|
867 |
|
slouken@0
|
868 |
/* Clean up the original surface, and update converted surface */
|
slouken@0
|
869 |
if ( convert != NULL ) {
|
slouken@0
|
870 |
SDL_SetClipRect(convert, &surface->clip_rect);
|
slouken@0
|
871 |
}
|
slouken@0
|
872 |
if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
|
slouken@0
|
873 |
Uint32 cflags = surface_flags&(SDL_SRCCOLORKEY|SDL_RLEACCELOK);
|
slouken@0
|
874 |
if ( convert != NULL ) {
|
slouken@0
|
875 |
Uint8 keyR, keyG, keyB;
|
slouken@0
|
876 |
|
slouken@0
|
877 |
SDL_GetRGB(colorkey,surface->format,&keyR,&keyG,&keyB);
|
slouken@0
|
878 |
SDL_SetColorKey(convert, cflags|(flags&SDL_RLEACCELOK),
|
slouken@0
|
879 |
SDL_MapRGB(convert->format, keyR, keyG, keyB));
|
slouken@0
|
880 |
}
|
slouken@0
|
881 |
SDL_SetColorKey(surface, cflags, colorkey);
|
slouken@0
|
882 |
}
|
slouken@0
|
883 |
if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
|
slouken@0
|
884 |
Uint32 aflags = surface_flags&(SDL_SRCALPHA|SDL_RLEACCELOK);
|
slouken@0
|
885 |
if ( convert != NULL ) {
|
slouken@0
|
886 |
SDL_SetAlpha(convert, aflags|(flags&SDL_RLEACCELOK),
|
slouken@0
|
887 |
alpha);
|
slouken@0
|
888 |
}
|
slouken@431
|
889 |
if ( format->Amask ) {
|
slouken@431
|
890 |
surface->flags |= SDL_SRCALPHA;
|
slouken@431
|
891 |
} else {
|
slouken@431
|
892 |
SDL_SetAlpha(surface, aflags, alpha);
|
slouken@431
|
893 |
}
|
slouken@0
|
894 |
}
|
slouken@0
|
895 |
|
slouken@0
|
896 |
/* We're ready to go! */
|
slouken@0
|
897 |
return(convert);
|
slouken@0
|
898 |
}
|
slouken@0
|
899 |
|
slouken@0
|
900 |
/*
|
slouken@0
|
901 |
* Free a surface created by the above function.
|
slouken@0
|
902 |
*/
|
slouken@0
|
903 |
void SDL_FreeSurface (SDL_Surface *surface)
|
slouken@0
|
904 |
{
|
slouken@0
|
905 |
/* Free anything that's not NULL, and not the screen surface */
|
slouken@0
|
906 |
if ((surface == NULL) ||
|
slouken@0
|
907 |
(current_video &&
|
slouken@0
|
908 |
((surface == SDL_ShadowSurface)||(surface == SDL_VideoSurface)))) {
|
slouken@0
|
909 |
return;
|
slouken@0
|
910 |
}
|
slouken@0
|
911 |
if ( --surface->refcount > 0 ) {
|
slouken@0
|
912 |
return;
|
slouken@0
|
913 |
}
|
slouken@915
|
914 |
while ( surface->locked > 0 ) {
|
slouken@915
|
915 |
SDL_UnlockSurface(surface);
|
slouken@915
|
916 |
}
|
slouken@0
|
917 |
if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) {
|
slouken@0
|
918 |
SDL_UnRLESurface(surface, 0);
|
slouken@0
|
919 |
}
|
slouken@0
|
920 |
if ( surface->format ) {
|
slouken@0
|
921 |
SDL_FreeFormat(surface->format);
|
slouken@0
|
922 |
surface->format = NULL;
|
slouken@0
|
923 |
}
|
slouken@0
|
924 |
if ( surface->map != NULL ) {
|
slouken@0
|
925 |
SDL_FreeBlitMap(surface->map);
|
slouken@0
|
926 |
surface->map = NULL;
|
slouken@0
|
927 |
}
|
slouken@422
|
928 |
if ( surface->hwdata ) {
|
slouken@0
|
929 |
SDL_VideoDevice *video = current_video;
|
slouken@0
|
930 |
SDL_VideoDevice *this = current_video;
|
slouken@0
|
931 |
video->FreeHWSurface(this, surface);
|
slouken@0
|
932 |
}
|
slouken@0
|
933 |
if ( surface->pixels &&
|
slouken@0
|
934 |
((surface->flags & SDL_PREALLOC) != SDL_PREALLOC) ) {
|
slouken@1336
|
935 |
SDL_free(surface->pixels);
|
slouken@0
|
936 |
}
|
slouken@1336
|
937 |
SDL_free(surface);
|
slouken@0
|
938 |
#ifdef CHECK_LEAKS
|
slouken@0
|
939 |
--surfaces_allocated;
|
slouken@0
|
940 |
#endif
|
slouken@0
|
941 |
}
|