slouken@0
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2009 Sam Lantinga
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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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License as published by the Free Software Foundation; either
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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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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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slouken@0
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14 |
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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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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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slouken@0
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slouken@0
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Sam Lantinga
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slouken@252
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slouken@libsdl.org
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slouken@0
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*/
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#include "SDL_config.h"
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#include "SDL_video.h"
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#include "SDL_compat.h"
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#include "SDL_sysvideo.h"
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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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#include "SDL_pixels_c.h"
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#include "SDL_leaks.h"
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/* Public routines */
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/*
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* Create an empty RGB surface of the appropriate depth
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*/
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SDL_Surface *
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SDL_CreateRGBSurface(Uint32 flags,
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int width, int height, int depth,
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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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SDL_Surface *surface;
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/* The flags are no longer used, make the compiler happy */
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flags;
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/* Allocate the surface */
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surface = (SDL_Surface *) SDL_calloc(1, sizeof(*surface));
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if (surface == NULL) {
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SDL_OutOfMemory();
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return NULL;
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}
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surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask);
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if (!surface->format) {
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SDL_FreeSurface(surface);
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return NULL;
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}
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surface->w = width;
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surface->h = height;
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surface->pitch = SDL_CalculatePitch(surface);
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SDL_SetClipRect(surface, NULL);
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if (surface->format->BitsPerPixel <= 8) {
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SDL_Palette *palette =
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SDL_AllocPalette((1 << surface->format->BitsPerPixel));
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if (!palette) {
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SDL_FreeSurface(surface);
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return NULL;
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}
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if (Rmask || Bmask || Gmask) {
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const SDL_PixelFormat *format = surface->format;
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/* create palette according to masks */
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int i;
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int Rm = 0, Gm = 0, Bm = 0;
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int Rw = 0, Gw = 0, Bw = 0;
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if (Rmask) {
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Rw = 8 - format->Rloss;
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for (i = format->Rloss; i > 0; i -= Rw)
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Rm |= 1 << i;
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}
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if (Gmask) {
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Gw = 8 - format->Gloss;
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for (i = format->Gloss; i > 0; i -= Gw)
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Gm |= 1 << i;
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}
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if (Bmask) {
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Bw = 8 - format->Bloss;
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for (i = format->Bloss; i > 0; i -= Bw)
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Bm |= 1 << i;
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}
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for (i = 0; i < palette->ncolors; ++i) {
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int r, g, b;
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r = (i & Rmask) >> format->Rshift;
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r = (r << format->Rloss) | ((r * Rm) >> Rw);
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palette->colors[i].r = r;
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g = (i & Gmask) >> format->Gshift;
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g = (g << format->Gloss) | ((g * Gm) >> Gw);
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palette->colors[i].g = g;
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b = (i & Bmask) >> format->Bshift;
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b = (b << format->Bloss) | ((b * Bm) >> Bw);
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palette->colors[i].b = b;
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}
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} else if (palette->ncolors == 2) {
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/* Create a black and white bitmap palette */
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palette->colors[0].r = 0xFF;
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palette->colors[0].g = 0xFF;
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palette->colors[0].b = 0xFF;
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palette->colors[1].r = 0x00;
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palette->colors[1].g = 0x00;
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palette->colors[1].b = 0x00;
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}
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SDL_SetSurfacePalette(surface, palette);
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SDL_FreePalette(palette);
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}
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/* Get the pixels */
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if (surface->w && surface->h) {
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slouken@1895
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surface->pixels = SDL_malloc(surface->h * surface->pitch);
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if (!surface->pixels) {
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SDL_FreeSurface(surface);
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slouken@1895
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SDL_OutOfMemory();
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slouken@1895
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return NULL;
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}
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/* This is important for bitmaps */
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SDL_memset(surface->pixels, 0, surface->h * surface->pitch);
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}
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/* Allocate an empty mapping */
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surface->map = SDL_AllocBlitMap();
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if (!surface->map) {
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SDL_FreeSurface(surface);
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return NULL;
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}
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SDL_FormatChanged(surface);
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/* By default surface with an alpha mask are set up for blending */
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if (Amask) {
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SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND);
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}
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slouken@2267
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slouken@1895
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/* The surface is ready to go */
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slouken@1895
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surface->refcount = 1;
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slouken@0
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#ifdef CHECK_LEAKS
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++surfaces_allocated;
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slouken@0
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#endif
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slouken@1895
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return surface;
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slouken@0
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}
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slouken@1895
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slouken@0
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/*
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slouken@0
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* Create an RGB surface from an existing memory buffer
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slouken@0
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156 |
*/
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slouken@1895
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SDL_Surface *
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slouken@1895
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SDL_CreateRGBSurfaceFrom(void *pixels,
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int width, int height, int depth, int pitch,
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slouken@1895
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160 |
Uint32 Rmask, Uint32 Gmask, Uint32 Bmask,
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slouken@1895
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Uint32 Amask)
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slouken@0
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{
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slouken@1895
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SDL_Surface *surface;
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slouken@1895
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164 |
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slouken@1895
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surface =
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slouken@1895
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SDL_CreateRGBSurface(0, 0, 0, depth, Rmask, Gmask, Bmask, Amask);
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slouken@1895
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if (surface != NULL) {
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slouken@1895
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surface->flags |= SDL_PREALLOC;
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slouken@1895
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surface->pixels = pixels;
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slouken@1895
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170 |
surface->w = width;
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slouken@1895
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171 |
surface->h = height;
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slouken@1895
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surface->pitch = pitch;
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slouken@1895
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SDL_SetClipRect(surface, NULL);
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slouken@1895
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}
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slouken@1895
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return surface;
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slouken@1895
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}
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slouken@1895
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177 |
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slouken@1895
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static int
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slouken@1895
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SDL_SurfacePaletteChanged(void *userdata, SDL_Palette * palette)
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slouken@1895
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180 |
{
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slouken@1895
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SDL_Surface *surface = (SDL_Surface *) userdata;
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slouken@1895
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182 |
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slouken@1895
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SDL_FormatChanged(surface);
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slouken@1895
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slouken@1895
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return 0;
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slouken@1895
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186 |
}
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slouken@1895
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187 |
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slouken@1895
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188 |
int
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slouken@1895
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SDL_SetSurfacePalette(SDL_Surface * surface, SDL_Palette * palette)
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slouken@1895
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190 |
{
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slouken@1895
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191 |
if (!surface || !surface->format) {
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slouken@1895
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SDL_SetError("SDL_SetSurfacePalette() passed a NULL surface");
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slouken@1895
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return -1;
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slouken@1895
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}
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slouken@1895
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195 |
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slouken@1895
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if (palette && palette->ncolors != (1 << surface->format->BitsPerPixel)) {
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slouken@1895
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SDL_SetError
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slouken@1895
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("SDL_SetSurfacePalette() passed a palette that doesn't match the surface format");
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slouken@1895
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return -1;
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slouken@1895
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200 |
}
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slouken@1895
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201 |
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slouken@1895
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202 |
if (surface->format->palette == palette) {
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slouken@1895
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203 |
return 0;
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slouken@1895
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204 |
}
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slouken@1895
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205 |
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slouken@1895
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206 |
if (surface->format->palette) {
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slouken@1895
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207 |
SDL_DelPaletteWatch(surface->format->palette,
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slouken@1895
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208 |
SDL_SurfacePaletteChanged, surface);
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slouken@1895
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209 |
}
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slouken@1895
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210 |
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slouken@1895
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211 |
surface->format->palette = palette;
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slouken@1895
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212 |
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slouken@1895
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213 |
if (surface->format->palette) {
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slouken@1895
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214 |
SDL_AddPaletteWatch(surface->format->palette,
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slouken@1895
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215 |
SDL_SurfacePaletteChanged, surface);
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slouken@1895
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216 |
}
|
slouken@1895
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217 |
return 0;
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slouken@1895
|
218 |
}
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slouken@1895
|
219 |
|
slouken@2267
|
220 |
int
|
slouken@2267
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221 |
SDL_SetSurfaceRLE(SDL_Surface * surface, int flag)
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slouken@0
|
222 |
{
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slouken@2267
|
223 |
int flags;
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slouken@0
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224 |
|
slouken@2266
|
225 |
if (!surface) {
|
slouken@2266
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226 |
return -1;
|
slouken@1895
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227 |
}
|
slouken@0
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228 |
|
slouken@2267
|
229 |
flags = surface->map->info.flags;
|
slouken@1895
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230 |
if (flag) {
|
slouken@2267
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231 |
surface->map->info.flags |= SDL_COPY_RLE_DESIRED;
|
slouken@1895
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232 |
} else {
|
slouken@2267
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233 |
surface->map->info.flags &= ~SDL_COPY_RLE_DESIRED;
|
slouken@1895
|
234 |
}
|
slouken@2267
|
235 |
if (surface->map->info.flags != flags) {
|
slouken@2266
|
236 |
SDL_InvalidateMap(surface->map);
|
slouken@2266
|
237 |
}
|
slouken@2266
|
238 |
return 0;
|
slouken@0
|
239 |
}
|
slouken@1895
|
240 |
|
slouken@2267
|
241 |
int
|
slouken@2267
|
242 |
SDL_SetColorKey(SDL_Surface * surface, Uint32 flag, Uint32 key)
|
slouken@0
|
243 |
{
|
slouken@2266
|
244 |
int flags;
|
slouken@0
|
245 |
|
slouken@2266
|
246 |
if (!surface) {
|
slouken@2266
|
247 |
return -1;
|
slouken@2266
|
248 |
}
|
slouken@2266
|
249 |
|
slouken@2266
|
250 |
if (flag & SDL_RLEACCEL) {
|
slouken@2266
|
251 |
SDL_SetSurfaceRLE(surface, 1);
|
slouken@1895
|
252 |
}
|
slouken@0
|
253 |
|
slouken@2266
|
254 |
flags = surface->map->info.flags;
|
slouken@2266
|
255 |
if (flag) {
|
slouken@2266
|
256 |
surface->map->info.flags |= SDL_COPY_COLORKEY;
|
slouken@2266
|
257 |
surface->map->info.colorkey = key;
|
slouken@2266
|
258 |
} else {
|
slouken@2266
|
259 |
surface->map->info.flags &= ~SDL_COPY_COLORKEY;
|
slouken@2266
|
260 |
}
|
slouken@2266
|
261 |
if (surface->map->info.flags != flags) {
|
slouken@2266
|
262 |
SDL_InvalidateMap(surface->map);
|
slouken@2266
|
263 |
}
|
slouken@2267
|
264 |
|
slouken@2267
|
265 |
/* Compatibility mode */
|
slouken@2267
|
266 |
if (surface->map->info.flags & SDL_COPY_COLORKEY) {
|
slouken@2267
|
267 |
surface->flags |= SDL_SRCCOLORKEY;
|
slouken@2267
|
268 |
} else {
|
slouken@2267
|
269 |
surface->flags &= ~SDL_SRCCOLORKEY;
|
slouken@2267
|
270 |
}
|
slouken@2267
|
271 |
|
slouken@2266
|
272 |
return 0;
|
slouken@2266
|
273 |
}
|
slouken@2266
|
274 |
|
slouken@3103
|
275 |
int
|
slouken@3103
|
276 |
SDL_GetColorKey(SDL_Surface * surface, Uint32 * key)
|
slouken@3103
|
277 |
{
|
slouken@3103
|
278 |
if (!surface) {
|
slouken@3103
|
279 |
return -1;
|
slouken@3103
|
280 |
}
|
slouken@3103
|
281 |
|
slouken@3103
|
282 |
if (!(surface->map->info.flags & SDL_COPY_COLORKEY)) {
|
slouken@3103
|
283 |
return -1;
|
slouken@3103
|
284 |
}
|
slouken@3103
|
285 |
|
slouken@3103
|
286 |
if (key) {
|
slouken@3103
|
287 |
*key = surface->map->info.colorkey;
|
slouken@3103
|
288 |
}
|
slouken@3103
|
289 |
return 0;
|
slouken@3103
|
290 |
}
|
slouken@3103
|
291 |
|
slouken@2785
|
292 |
/* This is a fairly slow function to switch from colorkey to alpha */
|
slouken@2787
|
293 |
static void
|
slouken@2786
|
294 |
SDL_ConvertColorkeyToAlpha(SDL_Surface * surface)
|
slouken@2785
|
295 |
{
|
slouken@2786
|
296 |
int x, y;
|
slouken@2785
|
297 |
|
slouken@2786
|
298 |
if (!surface) {
|
slouken@2786
|
299 |
return;
|
slouken@2786
|
300 |
}
|
slouken@2785
|
301 |
|
slouken@2786
|
302 |
if (!(surface->map->info.flags & SDL_COPY_COLORKEY) ||
|
slouken@2786
|
303 |
!surface->format->Amask) {
|
slouken@2786
|
304 |
return;
|
slouken@2786
|
305 |
}
|
slouken@2785
|
306 |
|
slouken@2786
|
307 |
SDL_LockSurface(surface);
|
slouken@2785
|
308 |
|
slouken@2786
|
309 |
switch (surface->format->BytesPerPixel) {
|
slouken@2786
|
310 |
case 2:
|
slouken@2786
|
311 |
{
|
slouken@2786
|
312 |
Uint16 *row, *spot;
|
slouken@2786
|
313 |
Uint16 ckey = (Uint16) surface->map->info.colorkey;
|
slouken@2786
|
314 |
Uint16 mask = (Uint16) (~surface->format->Amask);
|
slouken@2785
|
315 |
|
slouken@2786
|
316 |
row = (Uint16 *) surface->pixels;
|
slouken@2786
|
317 |
for (y = surface->h; y--;) {
|
slouken@2786
|
318 |
spot = row;
|
slouken@2786
|
319 |
for (x = surface->w; x--;) {
|
slouken@2786
|
320 |
if (*spot == ckey) {
|
slouken@2786
|
321 |
*spot &= mask;
|
slouken@2786
|
322 |
}
|
slouken@2786
|
323 |
++spot;
|
slouken@2786
|
324 |
}
|
slouken@2786
|
325 |
row += surface->pitch / 2;
|
slouken@2786
|
326 |
}
|
slouken@2786
|
327 |
}
|
slouken@2786
|
328 |
break;
|
slouken@2786
|
329 |
case 3:
|
slouken@2786
|
330 |
/* FIXME */
|
slouken@2786
|
331 |
break;
|
slouken@2786
|
332 |
case 4:
|
slouken@2786
|
333 |
{
|
slouken@2786
|
334 |
Uint32 *row, *spot;
|
slouken@2786
|
335 |
Uint32 ckey = surface->map->info.colorkey;
|
slouken@2786
|
336 |
Uint32 mask = ~surface->format->Amask;
|
slouken@2785
|
337 |
|
slouken@2786
|
338 |
row = (Uint32 *) surface->pixels;
|
slouken@2786
|
339 |
for (y = surface->h; y--;) {
|
slouken@2786
|
340 |
spot = row;
|
slouken@2786
|
341 |
for (x = surface->w; x--;) {
|
slouken@2786
|
342 |
if (*spot == ckey) {
|
slouken@2786
|
343 |
*spot &= mask;
|
slouken@2786
|
344 |
}
|
slouken@2786
|
345 |
++spot;
|
slouken@2786
|
346 |
}
|
slouken@2786
|
347 |
row += surface->pitch / 4;
|
slouken@2786
|
348 |
}
|
slouken@2786
|
349 |
}
|
slouken@2786
|
350 |
break;
|
slouken@2786
|
351 |
}
|
slouken@2785
|
352 |
|
slouken@2786
|
353 |
SDL_UnlockSurface(surface);
|
slouken@2785
|
354 |
|
slouken@2786
|
355 |
SDL_SetColorKey(surface, 0, 0);
|
slouken@2884
|
356 |
SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND);
|
slouken@2785
|
357 |
}
|
slouken@2785
|
358 |
|
slouken@2267
|
359 |
int
|
slouken@2267
|
360 |
SDL_SetSurfaceColorMod(SDL_Surface * surface, Uint8 r, Uint8 g, Uint8 b)
|
slouken@2266
|
361 |
{
|
slouken@2266
|
362 |
int flags;
|
slouken@2266
|
363 |
|
slouken@2266
|
364 |
if (!surface) {
|
slouken@2266
|
365 |
return -1;
|
slouken@1895
|
366 |
}
|
slouken@0
|
367 |
|
slouken@2266
|
368 |
surface->map->info.r = r;
|
slouken@2266
|
369 |
surface->map->info.g = g;
|
slouken@2266
|
370 |
surface->map->info.b = b;
|
slouken@0
|
371 |
|
slouken@2266
|
372 |
flags = surface->map->info.flags;
|
slouken@2266
|
373 |
if (r != 0xFF || g != 0xFF || b != 0xFF) {
|
slouken@2266
|
374 |
surface->map->info.flags |= SDL_COPY_MODULATE_COLOR;
|
slouken@1895
|
375 |
} else {
|
slouken@2266
|
376 |
surface->map->info.flags &= ~SDL_COPY_MODULATE_COLOR;
|
slouken@1895
|
377 |
}
|
slouken@2266
|
378 |
if (surface->map->info.flags != flags) {
|
slouken@1895
|
379 |
SDL_InvalidateMap(surface->map);
|
slouken@1895
|
380 |
}
|
slouken@2266
|
381 |
return 0;
|
slouken@0
|
382 |
}
|
slouken@1895
|
383 |
|
slouken@2266
|
384 |
|
slouken@2267
|
385 |
int
|
slouken@2267
|
386 |
SDL_GetSurfaceColorMod(SDL_Surface * surface, Uint8 * r, Uint8 * g, Uint8 * b)
|
slouken@431
|
387 |
{
|
slouken@2266
|
388 |
if (!surface) {
|
slouken@1895
|
389 |
return -1;
|
slouken@1895
|
390 |
}
|
slouken@2266
|
391 |
|
slouken@2266
|
392 |
if (r) {
|
slouken@2266
|
393 |
*r = surface->map->info.r;
|
slouken@2266
|
394 |
}
|
slouken@2266
|
395 |
if (g) {
|
slouken@2266
|
396 |
*g = surface->map->info.g;
|
slouken@2266
|
397 |
}
|
slouken@2266
|
398 |
if (b) {
|
slouken@2266
|
399 |
*b = surface->map->info.b;
|
slouken@1895
|
400 |
}
|
slouken@2266
|
401 |
return 0;
|
slouken@2266
|
402 |
}
|
slouken@2266
|
403 |
|
slouken@2267
|
404 |
int
|
slouken@2267
|
405 |
SDL_SetSurfaceAlphaMod(SDL_Surface * surface, Uint8 alpha)
|
slouken@2266
|
406 |
{
|
slouken@2266
|
407 |
int flags;
|
slouken@2266
|
408 |
|
slouken@2266
|
409 |
if (!surface) {
|
slouken@2266
|
410 |
return -1;
|
slouken@1895
|
411 |
}
|
slouken@431
|
412 |
|
slouken@2266
|
413 |
surface->map->info.a = alpha;
|
slouken@2266
|
414 |
|
slouken@2266
|
415 |
flags = surface->map->info.flags;
|
slouken@2266
|
416 |
if (alpha != 0xFF) {
|
slouken@2266
|
417 |
surface->map->info.flags |= SDL_COPY_MODULATE_ALPHA;
|
slouken@2266
|
418 |
} else {
|
slouken@2266
|
419 |
surface->map->info.flags &= ~SDL_COPY_MODULATE_ALPHA;
|
slouken@2266
|
420 |
}
|
slouken@2266
|
421 |
if (surface->map->info.flags != flags) {
|
slouken@2266
|
422 |
SDL_InvalidateMap(surface->map);
|
slouken@1895
|
423 |
}
|
slouken@2266
|
424 |
return 0;
|
slouken@2266
|
425 |
}
|
slouken@2266
|
426 |
|
slouken@2267
|
427 |
int
|
slouken@2267
|
428 |
SDL_GetSurfaceAlphaMod(SDL_Surface * surface, Uint8 * alpha)
|
slouken@2266
|
429 |
{
|
slouken@2266
|
430 |
if (!surface) {
|
slouken@2266
|
431 |
return -1;
|
slouken@1895
|
432 |
}
|
slouken@2266
|
433 |
|
slouken@2266
|
434 |
if (alpha) {
|
slouken@2266
|
435 |
*alpha = surface->map->info.a;
|
slouken@1895
|
436 |
}
|
slouken@1895
|
437 |
return 0;
|
slouken@431
|
438 |
}
|
slouken@0
|
439 |
|
slouken@2267
|
440 |
int
|
slouken@2267
|
441 |
SDL_SetSurfaceBlendMode(SDL_Surface * surface, int blendMode)
|
slouken@2266
|
442 |
{
|
slouken@2266
|
443 |
int flags, status;
|
slouken@2266
|
444 |
|
slouken@2266
|
445 |
if (!surface) {
|
slouken@2266
|
446 |
return -1;
|
slouken@2266
|
447 |
}
|
slouken@2266
|
448 |
|
slouken@2266
|
449 |
status = 0;
|
slouken@2266
|
450 |
flags = surface->map->info.flags;
|
slouken@2267
|
451 |
surface->map->info.flags &=
|
slouken@2267
|
452 |
~(SDL_COPY_MASK | SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD);
|
slouken@2266
|
453 |
switch (blendMode) {
|
slouken@2884
|
454 |
case SDL_BLENDMODE_NONE:
|
slouken@2266
|
455 |
break;
|
slouken@2884
|
456 |
case SDL_BLENDMODE_MASK:
|
slouken@2266
|
457 |
surface->map->info.flags |= SDL_COPY_MASK;
|
slouken@2266
|
458 |
break;
|
slouken@2884
|
459 |
case SDL_BLENDMODE_BLEND:
|
slouken@2266
|
460 |
surface->map->info.flags |= SDL_COPY_BLEND;
|
slouken@2266
|
461 |
break;
|
slouken@2884
|
462 |
case SDL_BLENDMODE_ADD:
|
slouken@2266
|
463 |
surface->map->info.flags |= SDL_COPY_ADD;
|
slouken@2266
|
464 |
break;
|
slouken@2884
|
465 |
case SDL_BLENDMODE_MOD:
|
slouken@2266
|
466 |
surface->map->info.flags |= SDL_COPY_MOD;
|
slouken@2266
|
467 |
break;
|
slouken@2266
|
468 |
default:
|
slouken@2266
|
469 |
SDL_Unsupported();
|
slouken@2266
|
470 |
status = -1;
|
slouken@2266
|
471 |
break;
|
slouken@2266
|
472 |
}
|
slouken@2266
|
473 |
|
slouken@2266
|
474 |
if (surface->map->info.flags != flags) {
|
slouken@2266
|
475 |
SDL_InvalidateMap(surface->map);
|
slouken@2266
|
476 |
}
|
slouken@2267
|
477 |
|
slouken@2267
|
478 |
/* Compatibility mode */
|
slouken@2267
|
479 |
if (surface->map->info.flags & SDL_COPY_BLEND) {
|
slouken@2267
|
480 |
surface->flags |= SDL_SRCALPHA;
|
slouken@2267
|
481 |
} else {
|
slouken@2267
|
482 |
surface->flags &= ~SDL_SRCALPHA;
|
slouken@2267
|
483 |
}
|
slouken@2267
|
484 |
|
slouken@2266
|
485 |
return status;
|
slouken@2266
|
486 |
}
|
slouken@2266
|
487 |
|
slouken@2267
|
488 |
int
|
slouken@2267
|
489 |
SDL_GetSurfaceBlendMode(SDL_Surface * surface, int *blendMode)
|
slouken@2266
|
490 |
{
|
slouken@2266
|
491 |
if (!surface) {
|
slouken@2266
|
492 |
return -1;
|
slouken@2266
|
493 |
}
|
slouken@2266
|
494 |
|
slouken@2266
|
495 |
if (!blendMode) {
|
slouken@2266
|
496 |
return 0;
|
slouken@2266
|
497 |
}
|
slouken@2266
|
498 |
|
slouken@3013
|
499 |
switch (surface->map->
|
slouken@3013
|
500 |
info.flags & (SDL_COPY_MASK | SDL_COPY_BLEND | SDL_COPY_ADD |
|
slouken@3013
|
501 |
SDL_COPY_MOD)) {
|
slouken@2266
|
502 |
case SDL_COPY_MASK:
|
slouken@2884
|
503 |
*blendMode = SDL_BLENDMODE_MASK;
|
slouken@2266
|
504 |
break;
|
slouken@2266
|
505 |
case SDL_COPY_BLEND:
|
slouken@2884
|
506 |
*blendMode = SDL_BLENDMODE_BLEND;
|
slouken@2266
|
507 |
break;
|
slouken@2266
|
508 |
case SDL_COPY_ADD:
|
slouken@2884
|
509 |
*blendMode = SDL_BLENDMODE_ADD;
|
slouken@2266
|
510 |
break;
|
slouken@2266
|
511 |
case SDL_COPY_MOD:
|
slouken@2884
|
512 |
*blendMode = SDL_BLENDMODE_MOD;
|
slouken@2266
|
513 |
break;
|
slouken@2266
|
514 |
default:
|
slouken@2884
|
515 |
*blendMode = SDL_BLENDMODE_NONE;
|
slouken@2266
|
516 |
break;
|
slouken@2266
|
517 |
}
|
slouken@2266
|
518 |
return 0;
|
slouken@2266
|
519 |
}
|
slouken@2266
|
520 |
|
slouken@2267
|
521 |
int
|
slouken@2267
|
522 |
SDL_SetSurfaceScaleMode(SDL_Surface * surface, int scaleMode)
|
slouken@2266
|
523 |
{
|
slouken@2266
|
524 |
int flags, status;
|
slouken@2266
|
525 |
|
slouken@2266
|
526 |
if (!surface) {
|
slouken@2266
|
527 |
return -1;
|
slouken@2266
|
528 |
}
|
slouken@2266
|
529 |
|
slouken@2266
|
530 |
status = 0;
|
slouken@2266
|
531 |
flags = surface->map->info.flags;
|
slouken@2266
|
532 |
surface->map->info.flags &= ~(SDL_COPY_NEAREST);
|
slouken@2266
|
533 |
switch (scaleMode) {
|
slouken@2266
|
534 |
case SDL_TEXTURESCALEMODE_NONE:
|
slouken@2266
|
535 |
break;
|
slouken@2266
|
536 |
case SDL_TEXTURESCALEMODE_FAST:
|
slouken@2266
|
537 |
surface->map->info.flags |= SDL_COPY_NEAREST;
|
slouken@2266
|
538 |
break;
|
slouken@2266
|
539 |
case SDL_TEXTURESCALEMODE_SLOW:
|
slouken@2266
|
540 |
case SDL_TEXTURESCALEMODE_BEST:
|
slouken@2266
|
541 |
SDL_Unsupported();
|
slouken@2266
|
542 |
surface->map->info.flags |= SDL_COPY_NEAREST;
|
slouken@2266
|
543 |
status = -1;
|
slouken@2266
|
544 |
break;
|
slouken@2266
|
545 |
default:
|
slouken@2266
|
546 |
SDL_Unsupported();
|
slouken@2266
|
547 |
status = -1;
|
slouken@2266
|
548 |
break;
|
slouken@2266
|
549 |
}
|
slouken@2266
|
550 |
|
slouken@2266
|
551 |
if (surface->map->info.flags != flags) {
|
slouken@2266
|
552 |
SDL_InvalidateMap(surface->map);
|
slouken@2266
|
553 |
}
|
slouken@2266
|
554 |
return status;
|
slouken@2266
|
555 |
}
|
slouken@2266
|
556 |
|
slouken@2267
|
557 |
int
|
slouken@2267
|
558 |
SDL_GetSurfaceScaleMode(SDL_Surface * surface, int *scaleMode)
|
slouken@2266
|
559 |
{
|
slouken@2266
|
560 |
if (!surface) {
|
slouken@2266
|
561 |
return -1;
|
slouken@2266
|
562 |
}
|
slouken@2266
|
563 |
|
slouken@2266
|
564 |
if (!scaleMode) {
|
slouken@2266
|
565 |
return 0;
|
slouken@2266
|
566 |
}
|
slouken@2266
|
567 |
|
slouken@2853
|
568 |
switch (surface->map->info.flags & SDL_COPY_NEAREST) {
|
slouken@2267
|
569 |
case SDL_COPY_NEAREST:
|
slouken@2267
|
570 |
*scaleMode = SDL_TEXTURESCALEMODE_FAST;
|
slouken@2266
|
571 |
break;
|
slouken@2266
|
572 |
default:
|
slouken@2267
|
573 |
*scaleMode = SDL_TEXTURESCALEMODE_NONE;
|
slouken@2266
|
574 |
break;
|
slouken@2266
|
575 |
}
|
slouken@2266
|
576 |
return 0;
|
slouken@2266
|
577 |
}
|
slouken@2266
|
578 |
|
slouken@1895
|
579 |
SDL_bool
|
slouken@1895
|
580 |
SDL_SetClipRect(SDL_Surface * surface, const SDL_Rect * rect)
|
slouken@0
|
581 |
{
|
slouken@1895
|
582 |
SDL_Rect full_rect;
|
slouken@0
|
583 |
|
slouken@1895
|
584 |
/* Don't do anything if there's no surface to act on */
|
slouken@1895
|
585 |
if (!surface) {
|
slouken@1895
|
586 |
return SDL_FALSE;
|
slouken@1895
|
587 |
}
|
slouken@1895
|
588 |
|
slouken@1895
|
589 |
/* Set up the full surface rectangle */
|
slouken@1895
|
590 |
full_rect.x = 0;
|
slouken@1895
|
591 |
full_rect.y = 0;
|
slouken@1895
|
592 |
full_rect.w = surface->w;
|
slouken@1895
|
593 |
full_rect.h = surface->h;
|
slouken@0
|
594 |
|
slouken@1895
|
595 |
/* Set the clipping rectangle */
|
slouken@1895
|
596 |
if (!rect) {
|
slouken@1895
|
597 |
surface->clip_rect = full_rect;
|
slouken@1895
|
598 |
return 1;
|
slouken@1895
|
599 |
}
|
slouken@1895
|
600 |
return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect);
|
slouken@1895
|
601 |
}
|
slouken@0
|
602 |
|
slouken@1895
|
603 |
void
|
slouken@1895
|
604 |
SDL_GetClipRect(SDL_Surface * surface, SDL_Rect * rect)
|
slouken@1895
|
605 |
{
|
slouken@1895
|
606 |
if (surface && rect) {
|
slouken@1895
|
607 |
*rect = surface->clip_rect;
|
slouken@1895
|
608 |
}
|
slouken@0
|
609 |
}
|
slouken@1895
|
610 |
|
slouken@0
|
611 |
/*
|
slouken@0
|
612 |
* Set up a blit between two surfaces -- split into three parts:
|
slouken@0
|
613 |
* The upper part, SDL_UpperBlit(), performs clipping and rectangle
|
slouken@0
|
614 |
* verification. The lower part is a pointer to a low level
|
slouken@0
|
615 |
* accelerated blitting function.
|
slouken@0
|
616 |
*
|
slouken@0
|
617 |
* These parts are separated out and each used internally by this
|
slouken@0
|
618 |
* library in the optimimum places. They are exported so that if
|
slouken@0
|
619 |
* you know exactly what you are doing, you can optimize your code
|
slouken@0
|
620 |
* by calling the one(s) you need.
|
slouken@0
|
621 |
*/
|
slouken@1895
|
622 |
int
|
slouken@1895
|
623 |
SDL_LowerBlit(SDL_Surface * src, SDL_Rect * srcrect,
|
slouken@1895
|
624 |
SDL_Surface * dst, SDL_Rect * dstrect)
|
slouken@0
|
625 |
{
|
slouken@1895
|
626 |
/* Check to make sure the blit mapping is valid */
|
slouken@1895
|
627 |
if ((src->map->dst != dst) ||
|
slouken@1895
|
628 |
(src->map->dst->format_version != src->map->format_version)) {
|
slouken@1895
|
629 |
if (SDL_MapSurface(src, dst) < 0) {
|
slouken@1895
|
630 |
return (-1);
|
slouken@1895
|
631 |
}
|
bob@2328
|
632 |
/* just here for debugging */
|
bob@2329
|
633 |
/* printf */
|
bob@2329
|
634 |
/* ("src = 0x%08X src->flags = %08X src->map->info.flags = %08x\ndst = 0x%08X dst->flags = %08X dst->map->info.flags = %08X\nsrc->map->blit = 0x%08x\n", */
|
bob@2329
|
635 |
/* src, dst->flags, src->map->info.flags, dst, dst->flags, */
|
bob@2329
|
636 |
/* dst->map->info.flags, src->map->blit); */
|
slouken@1895
|
637 |
}
|
slouken@2257
|
638 |
return (src->map->blit(src, srcrect, dst, dstrect));
|
slouken@0
|
639 |
}
|
slouken@0
|
640 |
|
slouken@0
|
641 |
|
slouken@1895
|
642 |
int
|
slouken@1895
|
643 |
SDL_UpperBlit(SDL_Surface * src, SDL_Rect * srcrect,
|
slouken@1895
|
644 |
SDL_Surface * dst, SDL_Rect * dstrect)
|
slouken@0
|
645 |
{
|
slouken@1895
|
646 |
SDL_Rect fulldst;
|
slouken@1895
|
647 |
int srcx, srcy, w, h;
|
slouken@0
|
648 |
|
slouken@1895
|
649 |
/* Make sure the surfaces aren't locked */
|
slouken@1895
|
650 |
if (!src || !dst) {
|
slouken@1895
|
651 |
SDL_SetError("SDL_UpperBlit: passed a NULL surface");
|
slouken@1895
|
652 |
return (-1);
|
slouken@1895
|
653 |
}
|
slouken@1895
|
654 |
if (src->locked || dst->locked) {
|
slouken@1895
|
655 |
SDL_SetError("Surfaces must not be locked during blit");
|
slouken@1895
|
656 |
return (-1);
|
slouken@1895
|
657 |
}
|
slouken@0
|
658 |
|
slouken@1895
|
659 |
/* If the destination rectangle is NULL, use the entire dest surface */
|
slouken@1895
|
660 |
if (dstrect == NULL) {
|
slouken@1895
|
661 |
fulldst.x = fulldst.y = 0;
|
slouken@1895
|
662 |
dstrect = &fulldst;
|
slouken@1895
|
663 |
}
|
slouken@1895
|
664 |
|
slouken@1895
|
665 |
/* clip the source rectangle to the source surface */
|
slouken@1895
|
666 |
if (srcrect) {
|
slouken@1895
|
667 |
int maxw, maxh;
|
slouken@0
|
668 |
|
slouken@1895
|
669 |
srcx = srcrect->x;
|
slouken@1895
|
670 |
w = srcrect->w;
|
slouken@1895
|
671 |
if (srcx < 0) {
|
slouken@1895
|
672 |
w += srcx;
|
slouken@1895
|
673 |
dstrect->x -= srcx;
|
slouken@1895
|
674 |
srcx = 0;
|
slouken@1895
|
675 |
}
|
slouken@1895
|
676 |
maxw = src->w - srcx;
|
slouken@1895
|
677 |
if (maxw < w)
|
slouken@1895
|
678 |
w = maxw;
|
slouken@0
|
679 |
|
slouken@1895
|
680 |
srcy = srcrect->y;
|
slouken@1895
|
681 |
h = srcrect->h;
|
slouken@1895
|
682 |
if (srcy < 0) {
|
slouken@1895
|
683 |
h += srcy;
|
slouken@1895
|
684 |
dstrect->y -= srcy;
|
slouken@1895
|
685 |
srcy = 0;
|
slouken@1895
|
686 |
}
|
slouken@1895
|
687 |
maxh = src->h - srcy;
|
slouken@1895
|
688 |
if (maxh < h)
|
slouken@1895
|
689 |
h = maxh;
|
slouken@0
|
690 |
|
slouken@1895
|
691 |
} else {
|
slouken@1895
|
692 |
srcx = srcy = 0;
|
slouken@1895
|
693 |
w = src->w;
|
slouken@1895
|
694 |
h = src->h;
|
slouken@1895
|
695 |
}
|
slouken@1895
|
696 |
|
slouken@1895
|
697 |
/* clip the destination rectangle against the clip rectangle */
|
slouken@1895
|
698 |
{
|
slouken@1895
|
699 |
SDL_Rect *clip = &dst->clip_rect;
|
slouken@1895
|
700 |
int dx, dy;
|
slouken@0
|
701 |
|
slouken@1895
|
702 |
dx = clip->x - dstrect->x;
|
slouken@1895
|
703 |
if (dx > 0) {
|
slouken@1895
|
704 |
w -= dx;
|
slouken@1895
|
705 |
dstrect->x += dx;
|
slouken@1895
|
706 |
srcx += dx;
|
slouken@1895
|
707 |
}
|
slouken@1895
|
708 |
dx = dstrect->x + w - clip->x - clip->w;
|
slouken@1895
|
709 |
if (dx > 0)
|
slouken@1895
|
710 |
w -= dx;
|
slouken@0
|
711 |
|
slouken@1895
|
712 |
dy = clip->y - dstrect->y;
|
slouken@1895
|
713 |
if (dy > 0) {
|
slouken@1895
|
714 |
h -= dy;
|
slouken@1895
|
715 |
dstrect->y += dy;
|
slouken@1895
|
716 |
srcy += dy;
|
slouken@1895
|
717 |
}
|
slouken@1895
|
718 |
dy = dstrect->y + h - clip->y - clip->h;
|
slouken@1895
|
719 |
if (dy > 0)
|
slouken@1895
|
720 |
h -= dy;
|
slouken@1895
|
721 |
}
|
slouken@0
|
722 |
|
slouken@1895
|
723 |
if (w > 0 && h > 0) {
|
slouken@1895
|
724 |
SDL_Rect sr;
|
slouken@1895
|
725 |
sr.x = srcx;
|
slouken@1895
|
726 |
sr.y = srcy;
|
slouken@1895
|
727 |
sr.w = dstrect->w = w;
|
slouken@1895
|
728 |
sr.h = dstrect->h = h;
|
slouken@1895
|
729 |
return SDL_LowerBlit(src, &sr, dst, dstrect);
|
slouken@1895
|
730 |
}
|
slouken@1895
|
731 |
dstrect->w = dstrect->h = 0;
|
slouken@1895
|
732 |
return 0;
|
slouken@0
|
733 |
}
|
slouken@0
|
734 |
|
slouken@0
|
735 |
/*
|
slouken@0
|
736 |
* Lock a surface to directly access the pixels
|
slouken@0
|
737 |
*/
|
slouken@1895
|
738 |
int
|
slouken@1895
|
739 |
SDL_LockSurface(SDL_Surface * surface)
|
slouken@0
|
740 |
{
|
slouken@1895
|
741 |
if (!surface->locked) {
|
slouken@1895
|
742 |
/* Perform the lock */
|
slouken@1895
|
743 |
if (surface->flags & SDL_RLEACCEL) {
|
slouken@1895
|
744 |
SDL_UnRLESurface(surface, 1);
|
slouken@1895
|
745 |
surface->flags |= SDL_RLEACCEL; /* save accel'd state */
|
slouken@1895
|
746 |
}
|
slouken@1895
|
747 |
}
|
slouken@0
|
748 |
|
slouken@1895
|
749 |
/* Increment the surface lock count, for recursive locks */
|
slouken@1895
|
750 |
++surface->locked;
|
slouken@0
|
751 |
|
slouken@1895
|
752 |
/* Ready to go.. */
|
slouken@1895
|
753 |
return (0);
|
slouken@0
|
754 |
}
|
slouken@1895
|
755 |
|
slouken@0
|
756 |
/*
|
slouken@0
|
757 |
* Unlock a previously locked surface
|
slouken@0
|
758 |
*/
|
slouken@1895
|
759 |
void
|
slouken@1895
|
760 |
SDL_UnlockSurface(SDL_Surface * surface)
|
slouken@0
|
761 |
{
|
slouken@1895
|
762 |
/* Only perform an unlock if we are locked */
|
slouken@1895
|
763 |
if (!surface->locked || (--surface->locked > 0)) {
|
slouken@1895
|
764 |
return;
|
slouken@1895
|
765 |
}
|
slouken@0
|
766 |
|
slouken@1895
|
767 |
/* Update RLE encoded surface with new data */
|
slouken@1895
|
768 |
if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) {
|
slouken@1895
|
769 |
surface->flags &= ~SDL_RLEACCEL; /* stop lying */
|
slouken@1895
|
770 |
SDL_RLESurface(surface);
|
slouken@1895
|
771 |
}
|
slouken@0
|
772 |
}
|
slouken@0
|
773 |
|
slouken@0
|
774 |
/*
|
slouken@0
|
775 |
* Convert a surface into the specified pixel format.
|
slouken@0
|
776 |
*/
|
slouken@1895
|
777 |
SDL_Surface *
|
slouken@2807
|
778 |
SDL_ConvertSurface(SDL_Surface * surface, SDL_PixelFormat * format,
|
slouken@2807
|
779 |
Uint32 flags)
|
slouken@0
|
780 |
{
|
slouken@1895
|
781 |
SDL_Surface *convert;
|
slouken@2266
|
782 |
Uint32 copy_flags;
|
slouken@1895
|
783 |
SDL_Rect bounds;
|
slouken@0
|
784 |
|
slouken@1895
|
785 |
/* Check for empty destination palette! (results in empty image) */
|
slouken@1895
|
786 |
if (format->palette != NULL) {
|
slouken@1895
|
787 |
int i;
|
slouken@1895
|
788 |
for (i = 0; i < format->palette->ncolors; ++i) {
|
slouken@1895
|
789 |
if ((format->palette->colors[i].r != 0xFF) ||
|
slouken@1895
|
790 |
(format->palette->colors[i].g != 0xFF) ||
|
slouken@1895
|
791 |
(format->palette->colors[i].b != 0xFF))
|
slouken@1895
|
792 |
break;
|
slouken@1895
|
793 |
}
|
slouken@1895
|
794 |
if (i == format->palette->ncolors) {
|
slouken@1895
|
795 |
SDL_SetError("Empty destination palette");
|
slouken@1895
|
796 |
return (NULL);
|
slouken@1895
|
797 |
}
|
slouken@1895
|
798 |
}
|
slouken@264
|
799 |
|
slouken@1895
|
800 |
/* Create a new surface with the desired format */
|
slouken@2807
|
801 |
convert = SDL_CreateRGBSurface(flags, surface->w, surface->h,
|
slouken@1895
|
802 |
format->BitsPerPixel, format->Rmask,
|
slouken@1895
|
803 |
format->Gmask, format->Bmask,
|
slouken@1895
|
804 |
format->Amask);
|
slouken@1895
|
805 |
if (convert == NULL) {
|
slouken@1895
|
806 |
return (NULL);
|
slouken@1895
|
807 |
}
|
slouken@0
|
808 |
|
slouken@1895
|
809 |
/* Copy the palette if any */
|
slouken@1895
|
810 |
if (format->palette && convert->format->palette) {
|
slouken@1895
|
811 |
SDL_memcpy(convert->format->palette->colors,
|
slouken@1895
|
812 |
format->palette->colors,
|
slouken@1895
|
813 |
format->palette->ncolors * sizeof(SDL_Color));
|
slouken@1895
|
814 |
convert->format->palette->ncolors = format->palette->ncolors;
|
slouken@1895
|
815 |
}
|
slouken@0
|
816 |
|
slouken@2266
|
817 |
/* Save the original copy flags */
|
slouken@2266
|
818 |
copy_flags = surface->map->info.flags;
|
slouken@2266
|
819 |
surface->map->info.flags = 0;
|
slouken@0
|
820 |
|
slouken@1895
|
821 |
/* Copy over the image data */
|
slouken@1895
|
822 |
bounds.x = 0;
|
slouken@1895
|
823 |
bounds.y = 0;
|
slouken@1895
|
824 |
bounds.w = surface->w;
|
slouken@1895
|
825 |
bounds.h = surface->h;
|
slouken@1895
|
826 |
SDL_LowerBlit(surface, &bounds, convert, &bounds);
|
slouken@0
|
827 |
|
slouken@1895
|
828 |
/* Clean up the original surface, and update converted surface */
|
slouken@2824
|
829 |
convert->map->info.r = surface->map->info.r;
|
slouken@2824
|
830 |
convert->map->info.g = surface->map->info.g;
|
slouken@2824
|
831 |
convert->map->info.b = surface->map->info.b;
|
slouken@2824
|
832 |
convert->map->info.a = surface->map->info.a;
|
slouken@2824
|
833 |
convert->map->info.flags =
|
slouken@2824
|
834 |
(copy_flags &
|
slouken@2824
|
835 |
~(SDL_COPY_COLORKEY | SDL_COPY_BLEND
|
slouken@2824
|
836 |
| SDL_COPY_RLE_DESIRED | SDL_COPY_RLE_COLORKEY |
|
slouken@2824
|
837 |
SDL_COPY_RLE_ALPHAKEY));
|
slouken@2824
|
838 |
surface->map->info.flags = copy_flags;
|
slouken@2266
|
839 |
if (copy_flags & SDL_COPY_COLORKEY) {
|
slouken@2266
|
840 |
Uint8 keyR, keyG, keyB, keyA;
|
slouken@0
|
841 |
|
slouken@2267
|
842 |
SDL_GetRGBA(surface->map->info.colorkey, surface->format, &keyR,
|
slouken@2267
|
843 |
&keyG, &keyB, &keyA);
|
slouken@2266
|
844 |
SDL_SetColorKey(convert, 1,
|
slouken@2266
|
845 |
SDL_MapRGBA(convert->format, keyR, keyG, keyB, keyA));
|
slouken@2824
|
846 |
/* This is needed when converting for 3D texture upload */
|
slouken@2787
|
847 |
SDL_ConvertColorkeyToAlpha(convert);
|
slouken@1895
|
848 |
}
|
slouken@2824
|
849 |
SDL_SetClipRect(convert, &surface->clip_rect);
|
slouken@2266
|
850 |
|
slouken@2266
|
851 |
/* Enable alpha blending by default if the new surface has an
|
slouken@2266
|
852 |
* alpha channel or alpha modulation */
|
slouken@2824
|
853 |
if ((surface->format->Amask && format->Amask) ||
|
slouken@2824
|
854 |
(copy_flags & SDL_COPY_MODULATE_ALPHA)) {
|
slouken@2884
|
855 |
SDL_SetSurfaceBlendMode(convert, SDL_BLENDMODE_BLEND);
|
slouken@1895
|
856 |
}
|
slouken@2824
|
857 |
if ((copy_flags & SDL_COPY_RLE_DESIRED) || (flags & SDL_RLEACCEL)) {
|
slouken@2824
|
858 |
SDL_SetSurfaceRLE(convert, SDL_RLEACCEL);
|
slouken@2824
|
859 |
}
|
slouken@0
|
860 |
|
slouken@1895
|
861 |
/* We're ready to go! */
|
slouken@1895
|
862 |
return (convert);
|
slouken@0
|
863 |
}
|
slouken@0
|
864 |
|
slouken@0
|
865 |
/*
|
slouken@3434
|
866 |
* Create a surface on the stack for quick blit operations
|
slouken@3434
|
867 |
*/
|
slouken@3434
|
868 |
static __inline__ SDL_bool
|
slouken@3434
|
869 |
SDL_CreateSurfaceOnStack(int width, int height, Uint32 pixel_format,
|
slouken@3434
|
870 |
void * pixels, int pitch, SDL_Surface * surface,
|
slouken@3434
|
871 |
SDL_PixelFormat * format, SDL_BlitMap * blitmap)
|
slouken@3434
|
872 |
{
|
slouken@3434
|
873 |
int bpp;
|
slouken@3434
|
874 |
Uint32 Rmask, Gmask, Bmask, Amask;
|
slouken@3434
|
875 |
|
slouken@3434
|
876 |
if (!SDL_PixelFormatEnumToMasks(pixel_format,
|
slouken@3434
|
877 |
&bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
|
slouken@3434
|
878 |
return SDL_FALSE;
|
slouken@3434
|
879 |
}
|
slouken@3434
|
880 |
if (bpp <= 8) {
|
slouken@3434
|
881 |
SDL_SetError("Indexed pixel formats not supported");
|
slouken@3434
|
882 |
return SDL_FALSE;
|
slouken@3434
|
883 |
}
|
slouken@3434
|
884 |
|
slouken@3434
|
885 |
SDL_zerop(surface);
|
slouken@3434
|
886 |
surface->flags = SDL_PREALLOC;
|
slouken@3434
|
887 |
surface->format = SDL_InitFormat(format, bpp, Rmask, Gmask, Bmask, Amask);
|
slouken@3434
|
888 |
surface->pixels = pixels;
|
slouken@3434
|
889 |
surface->w = width;
|
slouken@3434
|
890 |
surface->h = height;
|
slouken@3434
|
891 |
surface->pitch = pitch;
|
slouken@3434
|
892 |
/* We don't actually need to set up the clip rect for our purposes */
|
slouken@3434
|
893 |
/*SDL_SetClipRect(surface, NULL);*/
|
slouken@3434
|
894 |
|
slouken@3434
|
895 |
/* Allocate an empty mapping */
|
slouken@3434
|
896 |
SDL_zerop(blitmap);
|
slouken@3434
|
897 |
blitmap->info.r = 0xFF;
|
slouken@3434
|
898 |
blitmap->info.g = 0xFF;
|
slouken@3434
|
899 |
blitmap->info.b = 0xFF;
|
slouken@3434
|
900 |
blitmap->info.a = 0xFF;
|
slouken@3434
|
901 |
surface->map = blitmap;
|
slouken@3434
|
902 |
SDL_FormatChanged(surface);
|
slouken@3434
|
903 |
|
slouken@3434
|
904 |
/* The surface is ready to go */
|
slouken@3434
|
905 |
surface->refcount = 1;
|
slouken@3434
|
906 |
return SDL_TRUE;
|
slouken@3434
|
907 |
}
|
slouken@3434
|
908 |
|
slouken@3434
|
909 |
/*
|
slouken@3434
|
910 |
* Copy a block of pixels of one format to another format
|
slouken@3434
|
911 |
*/
|
slouken@3434
|
912 |
int SDL_ConvertPixels(int width, int height,
|
slouken@3434
|
913 |
Uint32 src_format, const void * src, int src_pitch,
|
slouken@3434
|
914 |
Uint32 dst_format, void * dst, int dst_pitch)
|
slouken@3434
|
915 |
{
|
slouken@3434
|
916 |
SDL_Surface src_surface, dst_surface;
|
slouken@3434
|
917 |
SDL_PixelFormat src_fmt, dst_fmt;
|
slouken@3434
|
918 |
SDL_BlitMap src_blitmap, dst_blitmap;
|
slouken@3434
|
919 |
SDL_Rect rect;
|
slouken@3434
|
920 |
|
slouken@3434
|
921 |
/* Fast path for same format copy */
|
slouken@3434
|
922 |
if (src_format == dst_format) {
|
slouken@3434
|
923 |
int bpp;
|
slouken@3434
|
924 |
|
slouken@3434
|
925 |
if (SDL_ISPIXELFORMAT_FOURCC(src_format)) {
|
slouken@3434
|
926 |
switch (src_format) {
|
slouken@3434
|
927 |
case SDL_PIXELFORMAT_YV12:
|
slouken@3434
|
928 |
case SDL_PIXELFORMAT_IYUV:
|
slouken@3434
|
929 |
case SDL_PIXELFORMAT_YUY2:
|
slouken@3434
|
930 |
case SDL_PIXELFORMAT_UYVY:
|
slouken@3434
|
931 |
case SDL_PIXELFORMAT_YVYU:
|
slouken@3434
|
932 |
bpp = 2;
|
slouken@3434
|
933 |
default:
|
slouken@3434
|
934 |
SDL_SetError("Unknown FOURCC pixel format");
|
slouken@3434
|
935 |
return -1;
|
slouken@3434
|
936 |
}
|
slouken@3434
|
937 |
} else {
|
slouken@3434
|
938 |
bpp = SDL_BYTESPERPIXEL(src_format);
|
slouken@3434
|
939 |
}
|
slouken@3434
|
940 |
width *= bpp;
|
slouken@3434
|
941 |
|
slouken@3434
|
942 |
while (height-- > 0) {
|
slouken@3434
|
943 |
SDL_memcpy(dst, src, width);
|
slouken@3434
|
944 |
src = (Uint8*)src + src_pitch;
|
slouken@3434
|
945 |
dst = (Uint8*)dst + dst_pitch;
|
slouken@3434
|
946 |
}
|
slouken@3434
|
947 |
return SDL_TRUE;
|
slouken@3434
|
948 |
}
|
slouken@3434
|
949 |
|
slouken@3434
|
950 |
if (!SDL_CreateSurfaceOnStack(width, height, src_format, (void*)src,
|
slouken@3434
|
951 |
src_pitch,
|
slouken@3434
|
952 |
&src_surface, &src_fmt, &src_blitmap)) {
|
slouken@3434
|
953 |
return -1;
|
slouken@3434
|
954 |
}
|
slouken@3434
|
955 |
if (!SDL_CreateSurfaceOnStack(width, height, dst_format, dst, dst_pitch,
|
slouken@3434
|
956 |
&dst_surface, &dst_fmt, &dst_blitmap)) {
|
slouken@3434
|
957 |
return -1;
|
slouken@3434
|
958 |
}
|
slouken@3434
|
959 |
|
slouken@3434
|
960 |
/* Set up the rect and go! */
|
slouken@3434
|
961 |
rect.x = 0;
|
slouken@3434
|
962 |
rect.y = 0;
|
slouken@3434
|
963 |
rect.w = width;
|
slouken@3436
|
964 |
rect.h = height;
|
slouken@3434
|
965 |
return SDL_LowerBlit(&src_surface, &rect, &dst_surface, &rect);
|
slouken@3434
|
966 |
}
|
slouken@3434
|
967 |
|
slouken@3434
|
968 |
/*
|
slouken@0
|
969 |
* Free a surface created by the above function.
|
slouken@0
|
970 |
*/
|
slouken@1895
|
971 |
void
|
slouken@1895
|
972 |
SDL_FreeSurface(SDL_Surface * surface)
|
slouken@0
|
973 |
{
|
slouken@1895
|
974 |
if (surface == NULL) {
|
slouken@1895
|
975 |
return;
|
slouken@1895
|
976 |
}
|
slouken@1895
|
977 |
if (--surface->refcount > 0) {
|
slouken@1895
|
978 |
return;
|
slouken@1895
|
979 |
}
|
slouken@1895
|
980 |
while (surface->locked > 0) {
|
slouken@1895
|
981 |
SDL_UnlockSurface(surface);
|
slouken@1895
|
982 |
}
|
slouken@1895
|
983 |
if (surface->flags & SDL_RLEACCEL) {
|
slouken@1895
|
984 |
SDL_UnRLESurface(surface, 0);
|
slouken@1895
|
985 |
}
|
slouken@1895
|
986 |
if (surface->format) {
|
slouken@1895
|
987 |
SDL_SetSurfacePalette(surface, NULL);
|
slouken@1895
|
988 |
SDL_FreeFormat(surface->format);
|
slouken@1895
|
989 |
surface->format = NULL;
|
slouken@1895
|
990 |
}
|
slouken@1895
|
991 |
if (surface->map != NULL) {
|
slouken@1895
|
992 |
SDL_FreeBlitMap(surface->map);
|
slouken@1895
|
993 |
surface->map = NULL;
|
slouken@1895
|
994 |
}
|
slouken@1895
|
995 |
if (surface->pixels && ((surface->flags & SDL_PREALLOC) != SDL_PREALLOC)) {
|
slouken@1895
|
996 |
SDL_free(surface->pixels);
|
slouken@1895
|
997 |
}
|
slouken@1895
|
998 |
SDL_free(surface);
|
slouken@0
|
999 |
#ifdef CHECK_LEAKS
|
slouken@1895
|
1000 |
--surfaces_allocated;
|
slouken@0
|
1001 |
#endif
|
slouken@0
|
1002 |
}
|
slouken@1895
|
1003 |
|
slouken@1895
|
1004 |
/* vi: set ts=4 sw=4 expandtab: */
|