SDL_video.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:48k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- #ifdef SAVE_RCSID
- static char rcsid =
- "@(#) $Id: SDL_video.c,v 1.4 2002/04/22 21:38:03 wmay Exp $";
- #endif
- /* The high-level video driver subsystem */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "SDL.h"
- #include "SDL_error.h"
- #include "SDL_video.h"
- #include "SDL_events.h"
- #include "SDL_mutex.h"
- #include "SDL_sysvideo.h"
- #include "SDL_sysevents.h"
- #include "SDL_blit.h"
- #include "SDL_pixels_c.h"
- #include "SDL_events_c.h"
- #include "SDL_cursor_c.h"
- /* Available video drivers */
- static VideoBootStrap *bootstrap[] = {
- #ifdef ENABLE_X11
- &X11_bootstrap,
- #endif
- #ifdef ENABLE_DGA
- &DGA_bootstrap,
- #endif
- #ifdef ENABLE_NANOX
- &NX_bootstrap,
- #endif
- #ifdef ENABLE_FBCON
- &FBCON_bootstrap,
- #endif
- #ifdef ENABLE_DIRECTFB
- &DirectFB_bootstrap,
- #endif
- #ifdef ENABLE_PS2GS
- &PS2GS_bootstrap,
- #endif
- #ifdef ENABLE_GGI
- &GGI_bootstrap,
- #endif
- #ifdef ENABLE_VGL
- &VGL_bootstrap,
- #endif
- #ifdef ENABLE_SVGALIB
- &SVGALIB_bootstrap,
- #endif
- #ifdef ENABLE_AALIB
- &AALIB_bootstrap,
- #endif
- #ifdef ENABLE_DIRECTX
- &DIRECTX_bootstrap,
- #endif
- #ifdef ENABLE_WINDIB
- &WINDIB_bootstrap,
- #endif
- #ifdef ENABLE_BWINDOW
- &BWINDOW_bootstrap,
- #endif
- #ifdef ENABLE_TOOLBOX
- &TOOLBOX_bootstrap,
- #endif
- #ifdef ENABLE_DRAWSPROCKET
- &DSp_bootstrap,
- #endif
- #ifdef ENABLE_QUARTZ
- &QZ_bootstrap,
- #endif
- #ifdef ENABLE_CYBERGRAPHICS
- &CGX_bootstrap,
- #endif
- #ifdef ENABLE_PHOTON
- &ph_bootstrap,
- #endif
- #ifdef ENABLE_EPOC
- &EPOC_bootstrap,
- #endif
- #ifdef ENABLE_DUMMYVIDEO
- &DUMMY_bootstrap,
- #endif
- #ifdef ENABLE_XBIOS
- &XBIOS_bootstrap,
- #endif
- #ifdef ENABLE_GEM
- &GEM_bootstrap,
- #endif
- NULL
- };
- SDL_VideoDevice *current_video = NULL;
- /* Various local functions */
- int SDL_VideoInit(const char *driver_name, Uint32 flags);
- void SDL_VideoQuit(void);
- void SDL_GL_UpdateRectsLock(SDL_VideoDevice* this, int numrects, SDL_Rect* rects);
- static SDL_GrabMode SDL_WM_GrabInputOff(void);
- #ifdef HAVE_OPENGL
- static int lock_count = 0;
- #endif
- /*
- * Initialize the video and event subsystems -- determine native pixel format
- */
- int SDL_VideoInit (const char *driver_name, Uint32 flags)
- {
- SDL_VideoDevice *video;
- int index;
- int i;
- SDL_PixelFormat vformat;
- Uint32 video_flags;
- /* Toggle the event thread flags, based on OS requirements */
- #if defined(MUST_THREAD_EVENTS)
- flags |= SDL_INIT_EVENTTHREAD;
- #elif defined(CANT_THREAD_EVENTS)
- if ( (flags & SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD ) {
- SDL_SetError("OS doesn't support threaded events");
- return(-1);
- }
- #endif
- /* Check to make sure we don't overwrite 'current_video' */
- if ( current_video != NULL ) {
- SDL_VideoQuit();
- }
- /* Select the proper video driver */
- index = 0;
- video = NULL;
- if ( driver_name != NULL ) {
- #if 0 /* This will be replaced with a better driver selection API */
- if ( strrchr(driver_name, ':') != NULL ) {
- index = atoi(strrchr(driver_name, ':')+1);
- }
- #endif
- for ( i=0; bootstrap[i]; ++i ) {
- if ( strncmp(bootstrap[i]->name, driver_name,
- strlen(bootstrap[i]->name)) == 0 ) {
- if ( bootstrap[i]->available() ) {
- video = bootstrap[i]->create(index);
- break;
- }
- }
- }
- } else {
- for ( i=0; bootstrap[i]; ++i ) {
- if ( bootstrap[i]->available() ) {
- video = bootstrap[i]->create(index);
- if ( video != NULL ) {
- break;
- }
- }
- }
- }
- if ( video == NULL ) {
- SDL_SetError("No available video device");
- return(-1);
- }
- current_video = video;
- current_video->name = bootstrap[i]->name;
- /* Do some basic variable initialization */
- video->screen = NULL;
- video->shadow = NULL;
- video->visible = NULL;
- video->physpal = NULL;
- video->gammacols = NULL;
- video->gamma = NULL;
- video->wm_title = NULL;
- video->wm_icon = NULL;
- video->offset_x = 0;
- video->offset_y = 0;
- memset(&video->info, 0, (sizeof video->info));
- /* Set some very sane GL defaults */
- video->gl_config.driver_loaded = 0;
- video->gl_config.dll_handle = NULL;
- video->gl_config.red_size = 5;
- #if 1 /* This seems to work on more video cards, as a default */
- video->gl_config.green_size = 5;
- #else
- video->gl_config.green_size = 6;
- #endif
- video->gl_config.blue_size = 5;
- video->gl_config.alpha_size = 0;
- video->gl_config.buffer_size = 0;
- video->gl_config.depth_size = 16;
- video->gl_config.stencil_size = 0;
- video->gl_config.double_buffer = 1;
- video->gl_config.accum_red_size = 0;
- video->gl_config.accum_green_size = 0;
- video->gl_config.accum_blue_size = 0;
- video->gl_config.accum_alpha_size = 0;
- /* Initialize the video subsystem */
- memset(&vformat, 0, sizeof(vformat));
- if ( video->VideoInit(video, &vformat) < 0 ) {
- SDL_VideoQuit();
- return(-1);
- }
- /* Create a zero sized video surface of the appropriate format */
- video_flags = SDL_SWSURFACE;
- SDL_VideoSurface = SDL_CreateRGBSurface(video_flags, 0, 0,
- vformat.BitsPerPixel,
- vformat.Rmask, vformat.Gmask, vformat.Bmask, 0);
- if ( SDL_VideoSurface == NULL ) {
- SDL_VideoQuit();
- return(-1);
- }
- SDL_PublicSurface = NULL; /* Until SDL_SetVideoMode() */
- #if 0 /* Don't change the current palette - may be used by other programs.
- * The application can't do anything with the display surface until
- * a video mode has been set anyway. :)
- */
- /* If we have a palettized surface, create a default palette */
- if ( SDL_VideoSurface->format->palette ) {
- SDL_PixelFormat *vf = SDL_VideoSurface->format;
- SDL_DitherColors(vf->palette->colors, vf->BitsPerPixel);
- video->SetColors(video,
- 0, vf->palette->ncolors, vf->palette->colors);
- }
- #endif
- video->info.vfmt = SDL_VideoSurface->format;
- /* Start the event loop */
- if ( SDL_StartEventLoop(flags) < 0 ) {
- SDL_VideoQuit();
- return(-1);
- }
- SDL_CursorInit(flags & SDL_INIT_EVENTTHREAD);
- /* We're ready to go! */
- return(0);
- }
- char *SDL_VideoDriverName(char *namebuf, int maxlen)
- {
- if ( current_video != NULL ) {
- strncpy(namebuf, current_video->name, maxlen-1);
- namebuf[maxlen-1] = ' ';
- return(namebuf);
- }
- return(NULL);
- }
- /*
- * Get the current display surface
- */
- SDL_Surface *SDL_GetVideoSurface(void)
- {
- SDL_Surface *visible;
- visible = NULL;
- if ( current_video ) {
- visible = current_video->visible;
- }
- return(visible);
- }
- /*
- * Get the current information about the video hardware
- */
- const SDL_VideoInfo *SDL_GetVideoInfo(void)
- {
- const SDL_VideoInfo *info;
- info = NULL;
- if ( current_video ) {
- info = ¤t_video->info;
- }
- return(info);
- }
- /*
- * Return a pointer to an array of available screen dimensions for the
- * given format, sorted largest to smallest. Returns NULL if there are
- * no dimensions available for a particular format, or (SDL_Rect **)-1
- * if any dimension is okay for the given format. If 'format' is NULL,
- * the mode list will be for the format given by SDL_GetVideoInfo()->vfmt
- */
- SDL_Rect ** SDL_ListModes (SDL_PixelFormat *format, Uint32 flags)
- {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- SDL_Rect **modes;
- modes = NULL;
- if ( SDL_VideoSurface ) {
- if ( format == NULL ) {
- format = SDL_VideoSurface->format;
- }
- modes = video->ListModes(this, format, flags);
- }
- return(modes);
- }
- /*
- * Check to see if a particular video mode is supported.
- * It returns 0 if the requested mode is not supported under any bit depth,
- * or returns the bits-per-pixel of the closest available mode with the
- * given width and height. If this bits-per-pixel is different from the
- * one used when setting the video mode, SDL_SetVideoMode() will succeed,
- * but will emulate the requested bits-per-pixel with a shadow surface.
- */
- static Uint8 SDL_closest_depths[4][8] = {
- /* 8 bit closest depth ordering */
- { 0, 8, 16, 15, 32, 24, 0, 0 },
- /* 15,16 bit closest depth ordering */
- { 0, 16, 15, 32, 24, 8, 0, 0 },
- /* 24 bit closest depth ordering */
- { 0, 24, 32, 16, 15, 8, 0, 0 },
- /* 32 bit closest depth ordering */
- { 0, 32, 16, 15, 24, 8, 0, 0 }
- };
- int SDL_VideoModeOK (int width, int height, int bpp, Uint32 flags)
- {
- int table, b, i;
- int supported;
- SDL_PixelFormat format;
- SDL_Rect **sizes;
- /* Currently 1 and 4 bpp are not supported */
- if ( bpp < 8 || bpp > 32 ) {
- return(0);
- }
- if ( (width == 0) || (height == 0) ) {
- return(0);
- }
- /* Search through the list valid of modes */
- memset(&format, 0, sizeof(format));
- supported = 0;
- table = ((bpp+7)/8)-1;
- SDL_closest_depths[table][0] = bpp;
- SDL_closest_depths[table][7] = 0;
- for ( b = 0; !supported && SDL_closest_depths[table][b]; ++b ) {
- format.BitsPerPixel = SDL_closest_depths[table][b];
- sizes = SDL_ListModes(&format, flags);
- if ( sizes == (SDL_Rect **)0 ) {
- /* No sizes supported at this bit-depth */
- continue;
- } else
- #ifdef macintosh /* MPW optimization bug? */
- if ( (sizes == (SDL_Rect **)0xFFFFFFFF) ||
- #else
- if ( (sizes == (SDL_Rect **)-1) ||
- #endif
- current_video->handles_any_size ) {
- /* Any size supported at this bit-depth */
- supported = 1;
- continue;
- } else
- for ( i=0; sizes[i]; ++i ) {
- if ((sizes[i]->w == width) && (sizes[i]->h == height)) {
- supported = 1;
- break;
- }
- }
- }
- if ( supported ) {
- --b;
- return(SDL_closest_depths[table][b]);
- } else {
- return(0);
- }
- }
- /*
- * Get the closest non-emulated video mode to the one requested
- */
- static int SDL_GetVideoMode (int *w, int *h, int *BitsPerPixel, Uint32 flags)
- {
- int table, b, i;
- int supported;
- int native_bpp;
- SDL_PixelFormat format;
- SDL_Rect **sizes;
- /* Try the original video mode, get the closest depth */
- native_bpp = SDL_VideoModeOK(*w, *h, *BitsPerPixel, flags);
- if ( native_bpp == *BitsPerPixel ) {
- return(1);
- }
- if ( native_bpp > 0 ) {
- *BitsPerPixel = native_bpp;
- return(1);
- }
- /* No exact size match at any depth, look for closest match */
- memset(&format, 0, sizeof(format));
- supported = 0;
- table = ((*BitsPerPixel+7)/8)-1;
- SDL_closest_depths[table][0] = *BitsPerPixel;
- SDL_closest_depths[table][7] = SDL_VideoSurface->format->BitsPerPixel;
- for ( b = 0; !supported && SDL_closest_depths[table][b]; ++b ) {
- format.BitsPerPixel = SDL_closest_depths[table][b];
- sizes = SDL_ListModes(&format, flags);
- if ( sizes == (SDL_Rect **)0 ) {
- /* No sizes supported at this bit-depth */
- continue;
- }
- for ( i=0; sizes[i]; ++i ) {
- if ((sizes[i]->w < *w) || (sizes[i]->h < *h)) {
- if ( i > 0 ) {
- --i;
- *w = sizes[i]->w;
- *h = sizes[i]->h;
- *BitsPerPixel = SDL_closest_depths[table][b];
- supported = 1;
- } else {
- /* Largest mode too small... */;
- }
- break;
- }
- }
- if ( (i > 0) && ! sizes[i] ) {
- /* The smallest mode was larger than requested, OK */
- --i;
- *w = sizes[i]->w;
- *h = sizes[i]->h;
- *BitsPerPixel = SDL_closest_depths[table][b];
- supported = 1;
- }
- }
- if ( ! supported ) {
- SDL_SetError("No video mode large enough for %dx%d", *w, *h);
- }
- return(supported);
- }
- /* This should probably go somewhere else -- like SDL_surface.c */
- static void SDL_ClearSurface(SDL_Surface *surface)
- {
- Uint32 black;
- black = SDL_MapRGB(surface->format, 0, 0, 0);
- SDL_FillRect(surface, NULL, black);
- if ((surface->flags&SDL_HWSURFACE) && (surface->flags&SDL_DOUBLEBUF)) {
- SDL_Flip(surface);
- SDL_FillRect(surface, NULL, black);
- }
- SDL_Flip(surface);
- }
- /*
- * Create a shadow surface suitable for fooling the app. :-)
- */
- static void SDL_CreateShadowSurface(int depth)
- {
- Uint32 Rmask, Gmask, Bmask;
- /* Allocate the shadow surface */
- if ( depth == (SDL_VideoSurface->format)->BitsPerPixel ) {
- Rmask = (SDL_VideoSurface->format)->Rmask;
- Gmask = (SDL_VideoSurface->format)->Gmask;
- Bmask = (SDL_VideoSurface->format)->Bmask;
- } else {
- Rmask = Gmask = Bmask = 0;
- }
- SDL_ShadowSurface = SDL_CreateRGBSurface(SDL_SWSURFACE,
- SDL_VideoSurface->w, SDL_VideoSurface->h,
- depth, Rmask, Gmask, Bmask, 0);
- if ( SDL_ShadowSurface == NULL ) {
- return;
- }
- /* 8-bit shadow surfaces report that they have exclusive palette */
- if ( SDL_ShadowSurface->format->palette ) {
- SDL_ShadowSurface->flags |= SDL_HWPALETTE;
- if ( depth == (SDL_VideoSurface->format)->BitsPerPixel ) {
- memcpy(SDL_ShadowSurface->format->palette->colors,
- SDL_VideoSurface->format->palette->colors,
- SDL_VideoSurface->format->palette->ncolors*
- sizeof(SDL_Color));
- } else {
- SDL_DitherColors(
- SDL_ShadowSurface->format->palette->colors, depth);
- }
- }
- /* If the video surface is resizable, the shadow should say so */
- if ( (SDL_VideoSurface->flags & SDL_RESIZABLE) == SDL_RESIZABLE ) {
- SDL_ShadowSurface->flags |= SDL_RESIZABLE;
- }
- /* If the video surface has no frame, the shadow should say so */
- if ( (SDL_VideoSurface->flags & SDL_NOFRAME) == SDL_NOFRAME ) {
- SDL_ShadowSurface->flags |= SDL_NOFRAME;
- }
- /* If the video surface is fullscreen, the shadow should say so */
- if ( (SDL_VideoSurface->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) {
- SDL_ShadowSurface->flags |= SDL_FULLSCREEN;
- }
- /* If the video surface is flippable, the shadow should say so */
- if ( (SDL_VideoSurface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
- SDL_ShadowSurface->flags |= SDL_DOUBLEBUF;
- }
- return;
- }
- /*
- * Set the requested video mode, allocating a shadow buffer if necessary.
- */
- SDL_Surface * SDL_SetVideoMode (int width, int height, int bpp, Uint32 flags)
- {
- SDL_VideoDevice *video, *this;
- SDL_Surface *prev_mode, *mode;
- int video_w;
- int video_h;
- int video_bpp;
- int is_opengl;
- SDL_GrabMode saved_grab;
- /* Start up the video driver, if necessary..
- WARNING: This is the only function protected this way!
- */
- if ( ! current_video ) {
- if ( SDL_Init(SDL_INIT_VIDEO|SDL_INIT_NOPARACHUTE) < 0 ) {
- return(NULL);
- }
- }
- this = video = current_video;
- /* Default to the current video bpp */
- if ( bpp == 0 ) {
- flags |= SDL_ANYFORMAT;
- bpp = SDL_VideoSurface->format->BitsPerPixel;
- }
- /* Get a good video mode, the closest one possible */
- video_w = width;
- video_h = height;
- video_bpp = bpp;
- if ( ! SDL_GetVideoMode(&video_w, &video_h, &video_bpp, flags) ) {
- return(NULL);
- }
- /* Check the requested flags */
- /* There's no palette in > 8 bits-per-pixel mode */
- if ( video_bpp > 8 ) {
- flags &= ~SDL_HWPALETTE;
- }
- #if 0
- if ( (flags&SDL_FULLSCREEN) != SDL_FULLSCREEN ) {
- /* There's no windowed double-buffering */
- flags &= ~SDL_DOUBLEBUF;
- }
- #endif
- if ( (flags&SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
- /* Use hardware surfaces when double-buffering */
- flags |= SDL_HWSURFACE;
- }
- is_opengl = ( ( flags & SDL_OPENGL ) == SDL_OPENGL );
- if ( is_opengl ) {
- /* These flags are for 2D video modes only */
- flags &= ~(SDL_HWSURFACE|SDL_DOUBLEBUF);
- }
- /* Reset the keyboard here so event callbacks can run */
- SDL_ResetKeyboard();
- /* Clean up any previous video mode */
- if ( SDL_PublicSurface != NULL ) {
- SDL_PublicSurface = NULL;
- }
- if ( SDL_ShadowSurface != NULL ) {
- SDL_Surface *ready_to_go;
- ready_to_go = SDL_ShadowSurface;
- SDL_ShadowSurface = NULL;
- SDL_FreeSurface(ready_to_go);
- }
- if ( video->physpal ) {
- free(video->physpal->colors);
- free(video->physpal);
- video->physpal = NULL;
- }
- if( video->gammacols) {
- free(video->gammacols);
- video->gammacols = NULL;
- }
- /* Save the previous grab state and turn off grab for mode switch */
- saved_grab = SDL_WM_GrabInputOff();
- /* Try to set the video mode, along with offset and clipping */
- prev_mode = SDL_VideoSurface;
- SDL_LockCursor();
- SDL_VideoSurface = NULL; /* In case it's freed by driver */
- mode = video->SetVideoMode(this, prev_mode,video_w,video_h,video_bpp,flags);
- if ( mode ) { /* Prevent resize events from mode change */
- SDL_PrivateResize(mode->w, mode->h);
- /* Sam - If we asked for OpenGL mode, and didn't get it, fail */
- if ( is_opengl && !(mode->flags & SDL_OPENGL) ) {
- mode = NULL;
- }
- }
- /*
- * rcg11292000
- * If you try to set an SDL_OPENGL surface, and fail to find a
- * matching visual, then the next call to SDL_SetVideoMode()
- * will segfault, since we no longer point to a dummy surface,
- * but rather NULL.
- * Sam 11/29/00
- * WARNING, we need to make sure that the previous mode hasn't
- * already been freed by the video driver. What do we do in
- * that case? Should we call SDL_VideoInit() again?
- */
- SDL_VideoSurface = (mode != NULL) ? mode : prev_mode;
- if ( (mode != NULL) && (!is_opengl) ) {
- /* Sanity check */
- if ( (mode->w < width) || (mode->h < height) ) {
- SDL_SetError("Video mode smaller than requested");
- return(NULL);
- }
- /* If we have a palettized surface, create a default palette */
- if ( mode->format->palette ) {
- SDL_PixelFormat *vf = mode->format;
- SDL_DitherColors(vf->palette->colors, vf->BitsPerPixel);
- video->SetColors(this, 0, vf->palette->ncolors,
- vf->palette->colors);
- }
- /* Clear the surface to black */
- video->offset_x = 0;
- video->offset_y = 0;
- mode->offset = 0;
- SDL_SetClipRect(mode, NULL);
- SDL_ClearSurface(mode);
- /* Now adjust the offsets to match the desired mode */
- video->offset_x = (mode->w-width)/2;
- video->offset_y = (mode->h-height)/2;
- mode->offset = video->offset_y*mode->pitch +
- video->offset_x*mode->format->BytesPerPixel;
- #ifdef DEBUG_VIDEO
- fprintf(stderr,
- "Requested mode: %dx%dx%d, obtained mode %dx%dx%d (offset %d)n",
- width, height, bpp,
- mode->w, mode->h, mode->format->BitsPerPixel, mode->offset);
- #endif
- mode->w = width;
- mode->h = height;
- SDL_SetClipRect(mode, NULL);
- }
- SDL_ResetCursor();
- SDL_UnlockCursor();
- /* If we failed setting a video mode, return NULL... (Uh Oh!) */
- if ( mode == NULL ) {
- return(NULL);
- }
- /* If there is no window manager, set the SDL_NOFRAME flag */
- if ( ! video->info.wm_available ) {
- mode->flags |= SDL_NOFRAME;
- }
- /* Reset the mouse cursor and grab for new video mode */
- SDL_SetCursor(NULL);
- if ( video->UpdateMouse ) {
- video->UpdateMouse(this);
- }
- SDL_WM_GrabInput(saved_grab);
- SDL_GetRelativeMouseState(NULL, NULL); /* Clear first large delta */
- /* If we're running OpenGL, make the context current */
- if ( (video->screen->flags & SDL_OPENGL) &&
- video->GL_MakeCurrent ) {
- if ( video->GL_MakeCurrent(this) < 0 ) {
- return(NULL);
- }
- }
- /* Set up a fake SDL surface for OpenGL "blitting" */
- if ( (flags & SDL_OPENGLBLIT) == SDL_OPENGLBLIT ) {
- /* Load GL functions for performing the texture updates */
- #ifdef HAVE_OPENGL
- #define SDL_PROC(ret,func,params)
- do {
- video->func = SDL_GL_GetProcAddress(#func);
- if ( ! video->func ) {
- SDL_SetError("Couldn't load GL function: %sn", #func);
- return(NULL);
- }
- } while ( 0 );
- #include "SDL_glfuncs.h"
- #undef SDL_PROC
- /* Create a software surface for blitting */
- #ifdef GL_VERSION_1_2
- /* If the implementation either supports the packed pixels
- extension, or implements the core OpenGL 1.2 API, it will
- support the GL_UNSIGNED_SHORT_5_6_5 texture format.
- */
- if ( (bpp == 16) &&
- (strstr((const char *)video->glGetString(GL_EXTENSIONS), "GL_EXT_packed_pixels") ||
- (atof((const char *)video->glGetString(GL_VERSION)) >= 1.2f))
- ) {
- video->is_32bit = 0;
- SDL_VideoSurface = SDL_CreateRGBSurface(
- flags,
- width,
- height,
- 16,
- 31 << 11,
- 63 << 5,
- 31,
- 0
- );
- }
- else
- #endif /* OpenGL 1.2 */
- {
- video->is_32bit = 1;
- SDL_VideoSurface = SDL_CreateRGBSurface(
- flags,
- width,
- height,
- 32,
- #if SDL_BYTEORDER == SDL_LIL_ENDIAN
- 0x000000FF,
- 0x0000FF00,
- 0x00FF0000,
- 0xFF000000
- #else
- 0xFF000000,
- 0x00FF0000,
- 0x0000FF00,
- 0x000000FF
- #endif
- );
- }
- if ( ! SDL_VideoSurface ) {
- return(NULL);
- }
- SDL_VideoSurface->flags = mode->flags | SDL_OPENGLBLIT;
- /* Free the original video mode surface (is this safe?) */
- SDL_FreeSurface(mode);
- /* Set the surface completely opaque & white by default */
- memset( SDL_VideoSurface->pixels, 255, SDL_VideoSurface->h * SDL_VideoSurface->pitch );
- video->glGenTextures( 1, &video->texture );
- video->glBindTexture( GL_TEXTURE_2D, video->texture );
- video->glTexImage2D(
- GL_TEXTURE_2D,
- 0,
- video->is_32bit ? GL_RGBA : GL_RGB,
- 256,
- 256,
- 0,
- video->is_32bit ? GL_RGBA : GL_RGB,
- #ifdef GL_VERSION_1_2
- video->is_32bit ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT_5_6_5,
- #else
- GL_UNSIGNED_BYTE,
- #endif
- NULL);
- video->UpdateRects = SDL_GL_UpdateRectsLock;
- #else
- SDL_SetError("Somebody forgot to #define HAVE_OPENGL");
- return(NULL);
- #endif
- }
- /* Create a shadow surface if necessary */
- /* There are three conditions under which we create a shadow surface:
- 1. We need a particular bits-per-pixel that we didn't get.
- 2. We need a hardware palette and didn't get one.
- 3. We need a software surface and got a hardware surface.
- */
- if ( !(SDL_VideoSurface->flags & SDL_OPENGL) &&
- (
- ( !(flags&SDL_ANYFORMAT) &&
- (SDL_VideoSurface->format->BitsPerPixel != bpp)) ||
- ( (flags&SDL_HWPALETTE) &&
- !(SDL_VideoSurface->flags&SDL_HWPALETTE)) ||
- /* If the surface is in hardware, video writes are visible
- as soon as they are performed, so we need to buffer them
- */
- ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) &&
- (SDL_VideoSurface->flags&SDL_HWSURFACE))
- ) ) {
- SDL_CreateShadowSurface(bpp);
- if ( SDL_ShadowSurface == NULL ) {
- SDL_SetError("Couldn't create shadow surface");
- return(NULL);
- }
- SDL_PublicSurface = SDL_ShadowSurface;
- } else {
- SDL_PublicSurface = SDL_VideoSurface;
- }
- video->info.vfmt = SDL_VideoSurface->format;
- /* We're done! */
- return(SDL_PublicSurface);
- }
- /*
- * Convert a surface into the video pixel format.
- */
- SDL_Surface * SDL_DisplayFormat (SDL_Surface *surface)
- {
- Uint32 flags;
- if ( ! SDL_PublicSurface ) {
- SDL_SetError("No video mode has been set");
- return(NULL);
- }
- /* Set the flags appropriate for copying to display surface */
- if (((SDL_PublicSurface->flags&SDL_HWSURFACE) == SDL_HWSURFACE) && current_video->info.blit_hw)
- flags = SDL_HWSURFACE;
- else
- flags = SDL_SWSURFACE;
- #ifdef AUTORLE_DISPLAYFORMAT
- flags |= (surface->flags & (SDL_SRCCOLORKEY|SDL_SRCALPHA));
- flags |= SDL_RLEACCELOK;
- #else
- flags |= surface->flags & (SDL_SRCCOLORKEY|SDL_SRCALPHA|SDL_RLEACCELOK);
- #endif
- return(SDL_ConvertSurface(surface, SDL_PublicSurface->format, flags));
- }
- /*
- * Convert a surface into a format that's suitable for blitting to
- * the screen, but including an alpha channel.
- */
- SDL_Surface *SDL_DisplayFormatAlpha(SDL_Surface *surface)
- {
- SDL_PixelFormat *vf;
- SDL_PixelFormat *format;
- SDL_Surface *converted;
- Uint32 flags;
- /* default to ARGB8888 */
- Uint32 amask = 0xff000000;
- Uint32 rmask = 0x00ff0000;
- Uint32 gmask = 0x0000ff00;
- Uint32 bmask = 0x000000ff;
- if ( ! SDL_PublicSurface ) {
- SDL_SetError("No video mode has been set");
- return(NULL);
- }
- vf = SDL_PublicSurface->format;
- switch(vf->BytesPerPixel) {
- case 2:
- /* For XGY5[56]5, use, AXGY8888, where {X, Y} = {R, B}.
- For anything else (like ARGB4444) it doesn't matter
- since we have no special code for it anyway */
- if ( (vf->Rmask == 0x1f) &&
- (vf->Bmask == 0xf800 || vf->Bmask == 0x7c00)) {
- rmask = 0xff;
- bmask = 0xff0000;
- }
- break;
- case 3:
- case 4:
- /* Keep the video format, as long as the high 8 bits are
- unused or alpha */
- if ( (vf->Rmask == 0xff) && (vf->Bmask == 0xff0000) ) {
- rmask = 0xff;
- bmask = 0xff0000;
- }
- break;
- default:
- /* We have no other optimised formats right now. When/if a new
- optimised alpha format is written, add the converter here */
- break;
- }
- format = SDL_AllocFormat(32, rmask, gmask, bmask, amask);
- flags = SDL_PublicSurface->flags & SDL_HWSURFACE;
- flags |= surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK);
- converted = SDL_ConvertSurface(surface, format, flags);
- SDL_FreeFormat(format);
- return(converted);
- }
- /*
- * Update a specific portion of the physical screen
- */
- void SDL_UpdateRect(SDL_Surface *screen, Sint32 x, Sint32 y, Uint32 w, Uint32 h)
- {
- if ( screen ) {
- SDL_Rect rect;
- /* Perform some checking */
- if ( w == 0 )
- w = screen->w;
- if ( h == 0 )
- h = screen->h;
- if ( (int)(x+w) > screen->w )
- return;
- if ( (int)(y+h) > screen->h )
- return;
- /* Fill the rectangle */
- rect.x = x;
- rect.y = y;
- rect.w = w;
- rect.h = h;
- SDL_UpdateRects(screen, 1, &rect);
- }
- }
- void SDL_UpdateRects (SDL_Surface *screen, int numrects, SDL_Rect *rects)
- {
- int i;
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- if ( screen == SDL_ShadowSurface ) {
- /* Blit the shadow surface using saved mapping */
- SDL_Palette *pal = screen->format->palette;
- SDL_Color *saved_colors = NULL;
- if ( pal && !(SDL_VideoSurface->flags & SDL_HWPALETTE) ) {
- /* simulated 8bpp, use correct physical palette */
- saved_colors = pal->colors;
- if ( video->gammacols ) {
- /* gamma-corrected palette */
- pal->colors = video->gammacols;
- } else if ( video->physpal ) {
- /* physical palette different from logical */
- pal->colors = video->physpal->colors;
- }
- }
- if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) {
- SDL_LockCursor();
- SDL_DrawCursor(SDL_ShadowSurface);
- for ( i=0; i<numrects; ++i ) {
- SDL_LowerBlit(SDL_ShadowSurface, &rects[i],
- SDL_VideoSurface, &rects[i]);
- }
- SDL_EraseCursor(SDL_ShadowSurface);
- SDL_UnlockCursor();
- } else {
- for ( i=0; i<numrects; ++i ) {
- SDL_LowerBlit(SDL_ShadowSurface, &rects[i],
- SDL_VideoSurface, &rects[i]);
- }
- }
- if ( saved_colors )
- pal->colors = saved_colors;
- /* Fall through to video surface update */
- screen = SDL_VideoSurface;
- }
- if ( screen == SDL_VideoSurface ) {
- /* Update the video surface */
- if ( screen->offset ) {
- for ( i=0; i<numrects; ++i ) {
- rects[i].x += video->offset_x;
- rects[i].y += video->offset_y;
- }
- video->UpdateRects(this, numrects, rects);
- for ( i=0; i<numrects; ++i ) {
- rects[i].x -= video->offset_x;
- rects[i].y -= video->offset_y;
- }
- } else {
- video->UpdateRects(this, numrects, rects);
- }
- }
- }
- /*
- * Performs hardware double buffering, if possible, or a full update if not.
- */
- int SDL_Flip(SDL_Surface *screen)
- {
- SDL_VideoDevice *video = current_video;
- /* Copy the shadow surface to the video surface */
- if ( screen == SDL_ShadowSurface ) {
- SDL_Rect rect;
- SDL_Palette *pal = screen->format->palette;
- SDL_Color *saved_colors = NULL;
- if ( pal && !(SDL_VideoSurface->flags & SDL_HWPALETTE) ) {
- /* simulated 8bpp, use correct physical palette */
- saved_colors = pal->colors;
- if ( video->gammacols ) {
- /* gamma-corrected palette */
- pal->colors = video->gammacols;
- } else if ( video->physpal ) {
- /* physical palette different from logical */
- pal->colors = video->physpal->colors;
- }
- }
- rect.x = 0;
- rect.y = 0;
- rect.w = screen->w;
- rect.h = screen->h;
- SDL_LowerBlit(SDL_ShadowSurface,&rect, SDL_VideoSurface,&rect);
- if ( saved_colors )
- pal->colors = saved_colors;
- screen = SDL_VideoSurface;
- }
- if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
- SDL_VideoDevice *this = current_video;
- return(video->FlipHWSurface(this, SDL_VideoSurface));
- } else {
- SDL_UpdateRect(screen, 0, 0, 0, 0);
- }
- return(0);
- }
- static void SetPalette_logical(SDL_Surface *screen, SDL_Color *colors,
- int firstcolor, int ncolors)
- {
- SDL_Palette *pal = screen->format->palette;
- SDL_Palette *vidpal;
- if ( colors != (pal->colors + firstcolor) ) {
- memcpy(pal->colors + firstcolor, colors,
- ncolors * sizeof(*colors));
- }
- vidpal = SDL_VideoSurface->format->palette;
- if ( (screen == SDL_ShadowSurface) && vidpal ) {
- /*
- * This is a shadow surface, and the physical
- * framebuffer is also indexed. Propagate the
- * changes to its logical palette so that
- * updates are always identity blits
- */
- memcpy(vidpal->colors + firstcolor, colors,
- ncolors * sizeof(*colors));
- }
- SDL_FormatChanged(screen);
- }
- static int SetPalette_physical(SDL_Surface *screen,
- SDL_Color *colors, int firstcolor, int ncolors)
- {
- SDL_VideoDevice *video = current_video;
- int gotall = 1;
- if ( video->physpal ) {
- /* We need to copy the new colors, since we haven't
- * already done the copy in the logical set above.
- */
- memcpy(video->physpal->colors + firstcolor,
- colors, ncolors * sizeof(*colors));
- }
- if ( screen == SDL_ShadowSurface ) {
- if ( SDL_VideoSurface->flags & SDL_HWPALETTE ) {
- /*
- * The real screen is also indexed - set its physical
- * palette. The physical palette does not include the
- * gamma modification, we apply it directly instead,
- * but this only happens if we have hardware palette.
- */
- screen = SDL_VideoSurface;
- } else {
- /*
- * The video surface is not indexed - invalidate any
- * active shadow-to-video blit mappings.
- */
- if ( screen->map->dst == SDL_VideoSurface ) {
- SDL_InvalidateMap(screen->map);
- }
- if ( video->gamma ) {
- if( ! video->gammacols ) {
- SDL_Palette *pp = video->physpal;
- if(!pp)
- pp = screen->format->palette;
- video->gammacols = malloc(pp->ncolors
- * sizeof(SDL_Color));
- SDL_ApplyGamma(video->gamma,
- pp->colors,
- video->gammacols,
- pp->ncolors);
- } else {
- SDL_ApplyGamma(video->gamma, colors,
- video->gammacols
- + firstcolor,
- ncolors);
- }
- }
- SDL_UpdateRect(screen, 0, 0, 0, 0);
- }
- }
- if ( screen == SDL_VideoSurface ) {
- SDL_Color gcolors[256];
- if ( video->gamma ) {
- SDL_ApplyGamma(video->gamma, colors, gcolors, ncolors);
- colors = gcolors;
- }
- gotall = video->SetColors(video, firstcolor, ncolors, colors);
- if ( ! gotall ) {
- /* The video flags shouldn't have SDL_HWPALETTE, and
- the video driver is responsible for copying back the
- correct colors into the video surface palette.
- */
- ;
- }
- SDL_CursorPaletteChanged();
- }
- return gotall;
- }
- /*
- * Set the physical and/or logical colormap of a surface:
- * Only the screen has a physical colormap. It determines what is actually
- * sent to the display.
- * The logical colormap is used to map blits to/from the surface.
- * 'which' is one or both of SDL_LOGPAL, SDL_PHYSPAL
- *
- * Return nonzero if all colours were set as requested, or 0 otherwise.
- */
- int SDL_SetPalette(SDL_Surface *screen, int which,
- SDL_Color *colors, int firstcolor, int ncolors)
- {
- SDL_Palette *pal;
- int gotall;
- int palsize;
- if ( ! current_video ) {
- return 0;
- }
- if ( screen != SDL_PublicSurface ) {
- /* only screens have physical palettes */
- which &= ~SDL_PHYSPAL;
- } else if( (screen->flags & SDL_HWPALETTE) != SDL_HWPALETTE ) {
- /* hardware palettes required for split colormaps */
- which |= SDL_PHYSPAL | SDL_LOGPAL;
- }
- /* Verify the parameters */
- pal = screen->format->palette;
- if( !pal ) {
- return 0; /* not a palettized surface */
- }
- gotall = 1;
- palsize = 1 << screen->format->BitsPerPixel;
- if ( ncolors > (palsize - firstcolor) ) {
- ncolors = (palsize - firstcolor);
- gotall = 0;
- }
- if ( which & SDL_LOGPAL ) {
- /*
- * Logical palette change: The actual screen isn't affected,
- * but the internal colormap is altered so that the
- * interpretation of the pixel values (for blits etc) is
- * changed.
- */
- SetPalette_logical(screen, colors, firstcolor, ncolors);
- }
- if ( which & SDL_PHYSPAL ) {
- SDL_VideoDevice *video = current_video;
- /*
- * Physical palette change: This doesn't affect the
- * program's idea of what the screen looks like, but changes
- * its actual appearance.
- */
- if(!video)
- return gotall; /* video not yet initialized */
- if(!video->physpal && !(which & SDL_LOGPAL) ) {
- /* Lazy physical palette allocation */
- int size;
- SDL_Palette *pp = malloc(sizeof(*pp));
- current_video->physpal = pp;
- pp->ncolors = pal->ncolors;
- size = pp->ncolors * sizeof(SDL_Color);
- pp->colors = malloc(size);
- memcpy(pp->colors, pal->colors, size);
- }
- if ( ! SetPalette_physical(screen,
- colors, firstcolor, ncolors) ) {
- gotall = 0;
- }
- }
- return gotall;
- }
- int SDL_SetColors(SDL_Surface *screen, SDL_Color *colors, int firstcolor,
- int ncolors)
- {
- return SDL_SetPalette(screen, SDL_LOGPAL | SDL_PHYSPAL,
- colors, firstcolor, ncolors);
- }
- /*
- * Clean up the video subsystem
- */
- void SDL_VideoQuit (void)
- {
- SDL_Surface *ready_to_go;
- if ( current_video ) {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- /* Halt event processing before doing anything else */
- SDL_StopEventLoop();
- /* Clean up allocated window manager items */
- if ( SDL_PublicSurface ) {
- SDL_PublicSurface = NULL;
- }
- SDL_CursorQuit();
- /* Just in case... */
- SDL_WM_GrabInputOff();
- /* Clean up the system video */
- video->VideoQuit(this);
- /* Free any lingering surfaces */
- ready_to_go = SDL_ShadowSurface;
- SDL_ShadowSurface = NULL;
- SDL_FreeSurface(ready_to_go);
- if ( SDL_VideoSurface != NULL ) {
- ready_to_go = SDL_VideoSurface;
- SDL_VideoSurface = NULL;
- SDL_FreeSurface(ready_to_go);
- }
- SDL_PublicSurface = NULL;
- /* Clean up miscellaneous memory */
- if ( video->physpal ) {
- free(video->physpal->colors);
- free(video->physpal);
- video->physpal = NULL;
- }
- if ( video->gammacols ) {
- free(video->gammacols);
- video->gammacols = NULL;
- }
- if ( video->gamma ) {
- free(video->gamma);
- video->gamma = NULL;
- }
- if ( video->wm_title != NULL ) {
- free(video->wm_title);
- video->wm_title = NULL;
- }
- if ( video->wm_icon != NULL ) {
- free(video->wm_icon);
- video->wm_icon = NULL;
- }
- /* Finish cleaning up video subsystem */
- video->free(this);
- current_video = NULL;
- }
- return;
- }
- /* Load the GL driver library */
- int SDL_GL_LoadLibrary(const char *path)
- {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- int retval;
- retval = -1;
- if ( video && video->GL_LoadLibrary ) {
- retval = video->GL_LoadLibrary(this, path);
- } else {
- SDL_SetError("No dynamic GL support in video driver");
- }
- return(retval);
- }
- void *SDL_GL_GetProcAddress(const char* proc)
- {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- void *func;
- func = NULL;
- if ( video->GL_GetProcAddress ) {
- if ( video->gl_config.driver_loaded ) {
- func = video->GL_GetProcAddress(this, proc);
- } else {
- SDL_SetError("No GL driver has been loaded");
- }
- } else {
- SDL_SetError("No dynamic GL support in video driver");
- }
- return func;
- }
- /* Set the specified GL attribute for setting up a GL video mode */
- int SDL_GL_SetAttribute( SDL_GLattr attr, int value )
- {
- int retval;
- SDL_VideoDevice *video = current_video;
- retval = 0;
- switch (attr) {
- case SDL_GL_RED_SIZE:
- video->gl_config.red_size = value;
- break;
- case SDL_GL_GREEN_SIZE:
- video->gl_config.green_size = value;
- break;
- case SDL_GL_BLUE_SIZE:
- video->gl_config.blue_size = value;
- break;
- case SDL_GL_ALPHA_SIZE:
- video->gl_config.alpha_size = value;
- break;
- case SDL_GL_DOUBLEBUFFER:
- video->gl_config.double_buffer = value;
- break;
- case SDL_GL_BUFFER_SIZE:
- video->gl_config.buffer_size = value;
- break;
- case SDL_GL_DEPTH_SIZE:
- video->gl_config.depth_size = value;
- break;
- case SDL_GL_STENCIL_SIZE:
- video->gl_config.stencil_size = value;
- break;
- case SDL_GL_ACCUM_RED_SIZE:
- video->gl_config.accum_red_size = value;
- break;
- case SDL_GL_ACCUM_GREEN_SIZE:
- video->gl_config.accum_green_size = value;
- break;
- case SDL_GL_ACCUM_BLUE_SIZE:
- video->gl_config.accum_blue_size = value;
- break;
- case SDL_GL_ACCUM_ALPHA_SIZE:
- video->gl_config.accum_alpha_size = value;
- break;
- default:
- SDL_SetError("Unknown OpenGL attribute");
- retval = -1;
- break;
- }
- return(retval);
- }
- /* Retrieve an attribute value from the windowing system. */
- int SDL_GL_GetAttribute(SDL_GLattr attr, int* value)
- {
- int retval = -1;
- SDL_VideoDevice* video = current_video;
- SDL_VideoDevice* this = current_video;
- if ( video->GL_GetAttribute ) {
- retval = this->GL_GetAttribute(this, attr, value);
- } else {
- *value = 0;
- SDL_SetError("GL_GetAttribute not supported");
- }
- return retval;
- }
- /* Perform a GL buffer swap on the current GL context */
- void SDL_GL_SwapBuffers(void)
- {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- if ( video->screen->flags & SDL_OPENGL ) {
- video->GL_SwapBuffers(this);
- } else {
- SDL_SetError("OpenGL video mode has not been set");
- }
- }
- /* Update rects with locking */
- void SDL_GL_UpdateRectsLock(SDL_VideoDevice* this, int numrects, SDL_Rect *rects)
- {
- SDL_GL_Lock();
- SDL_GL_UpdateRects(numrects, rects);
- SDL_GL_Unlock();
- }
- /* Update rects without state setting and changing (the caller is responsible for it) */
- void SDL_GL_UpdateRects(int numrects, SDL_Rect *rects)
- {
- #ifdef HAVE_OPENGL
- SDL_VideoDevice *this = current_video;
- SDL_Rect update, tmp;
- int x, y, i;
- for ( i = 0; i < numrects; i++ )
- {
- tmp.y = rects[i].y;
- tmp.h = rects[i].h;
- for ( y = 0; y <= rects[i].h / 256; y++ )
- {
- tmp.x = rects[i].x;
- tmp.w = rects[i].w;
- for ( x = 0; x <= rects[i].w / 256; x++ )
- {
- update.x = tmp.x;
- update.y = tmp.y;
- update.w = tmp.w;
- update.h = tmp.h;
- if ( update.w > 256 )
- update.w = 256;
- if ( update.h > 256 )
- update.h = 256;
- this->glFlush();
- this->glTexSubImage2D(
- GL_TEXTURE_2D,
- 0,
- 0,
- 0,
- update.w,
- update.h,
- this->is_32bit? GL_RGBA : GL_RGB,
- #ifdef GL_VERSION_1_2
- this->is_32bit ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT_5_6_5,
- #else
- GL_UNSIGNED_BYTE,
- #endif
- (Uint8 *)this->screen->pixels +
- this->screen->format->BytesPerPixel * update.x +
- update.y * this->screen->pitch );
- this->glFlush();
- /*
- * Note the parens around the function name:
- * This is because some OpenGL implementations define glTexCoord etc
- * as macros, and we don't want them expanded here.
- */
- this->glBegin(GL_TRIANGLE_STRIP);
- (this->glTexCoord2f)( 0.0, 0.0 );
- (this->glVertex2i)( update.x, update.y );
- (this->glTexCoord2f)( (float)(update.w / 256.0), 0.0 );
- (this->glVertex2i)( update.x + update.w, update.y );
- (this->glTexCoord2f)( 0.0, (float)(update.h / 256.0) );
- (this->glVertex2i)( update.x, update.y + update.h );
- (this->glTexCoord2f)( (float)(update.w / 256.0), (float)(update.h / 256.0) );
- (this->glVertex2i)( update.x + update.w , update.y + update.h );
- this->glEnd();
- tmp.x += 256;
- tmp.w -= 256;
- }
- tmp.y += 256;
- tmp.h -= 256;
- }
- }
- #endif
- }
- /* Lock == save current state */
- void SDL_GL_Lock()
- {
- #ifdef HAVE_OPENGL
- lock_count--;
- if (lock_count==-1)
- {
- SDL_VideoDevice *this = current_video;
- this->glPushAttrib( GL_ALL_ATTRIB_BITS ); /* TODO: narrow range of what is saved */
- #ifdef GL_CLIENT_PIXEL_STORE_BIT
- this->glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
- #endif
- this->glEnable(GL_TEXTURE_2D);
- this->glEnable(GL_BLEND);
- this->glDisable(GL_FOG);
- this->glDisable(GL_ALPHA_TEST);
- this->glDisable(GL_DEPTH_TEST);
- this->glDisable(GL_SCISSOR_TEST);
- this->glDisable(GL_STENCIL_TEST);
- this->glDisable(GL_CULL_FACE);
- this->glBindTexture( GL_TEXTURE_2D, this->texture );
- this->glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
- this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
- this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
- this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
- this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
- this->glPixelStorei( GL_UNPACK_ROW_LENGTH, this->screen->pitch / this->screen->format->BytesPerPixel );
- this->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- (this->glColor4f)(1.0, 1.0, 1.0, 1.0); /* Solaris workaround */
- this->glViewport(0, 0, this->screen->w, this->screen->h);
- this->glMatrixMode(GL_PROJECTION);
- this->glPushMatrix();
- this->glLoadIdentity();
- this->glOrtho(0.0, (GLdouble) this->screen->w, (GLdouble) this->screen->h, 0.0, 0.0, 1.0);
- this->glMatrixMode(GL_MODELVIEW);
- this->glPushMatrix();
- this->glLoadIdentity();
- }
- #endif
- }
- /* Unlock == restore saved state */
- void SDL_GL_Unlock()
- {
- #ifdef HAVE_OPENGL
- lock_count++;
- if (lock_count==0)
- {
- SDL_VideoDevice *this = current_video;
- this->glPopMatrix();
- this->glMatrixMode(GL_PROJECTION);
- this->glPopMatrix();
- this->glPopClientAttrib();
- this->glPopAttrib();
- }
- #endif
- }
- /*
- * Sets/Gets the title and icon text of the display window, if any.
- */
- void SDL_WM_SetCaption (const char *title, const char *icon)
- {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- if ( video ) {
- if ( title ) {
- if ( video->wm_title ) {
- free(video->wm_title);
- }
- video->wm_title = (char *)malloc(strlen(title)+1);
- if ( video->wm_title != NULL ) {
- strcpy(video->wm_title, title);
- }
- }
- if ( icon ) {
- if ( video->wm_icon ) {
- free(video->wm_icon);
- }
- video->wm_icon = (char *)malloc(strlen(icon)+1);
- if ( video->wm_icon != NULL ) {
- strcpy(video->wm_icon, icon);
- }
- }
- if ( (title || icon) && (video->SetCaption != NULL) ) {
- video->SetCaption(this, video->wm_title,video->wm_icon);
- }
- }
- }
- void SDL_WM_GetCaption (char **title, char **icon)
- {
- SDL_VideoDevice *video = current_video;
- if ( video ) {
- if ( title ) {
- *title = video->wm_title;
- }
- if ( icon ) {
- *icon = video->wm_icon;
- }
- }
- }
- /* Utility function used by SDL_WM_SetIcon() */
- static void CreateMaskFromColorKey(SDL_Surface *icon, Uint8 *mask)
- {
- int x, y;
- Uint32 colorkey;
- #define SET_MASKBIT(icon, x, y, mask)
- mask[(y*((icon->w+7)/8))+(x/8)] &= ~(0x01<<(7-(x%8)))
- colorkey = icon->format->colorkey;
- switch (icon->format->BytesPerPixel) {
- case 1: { Uint8 *pixels;
- for ( y=0; y<icon->h; ++y ) {
- pixels = (Uint8 *)icon->pixels + y*icon->pitch;
- for ( x=0; x<icon->w; ++x ) {
- if ( *pixels++ == colorkey ) {
- SET_MASKBIT(icon, x, y, mask);
- }
- }
- }
- }
- break;
- case 2: { Uint16 *pixels;
- for ( y=0; y<icon->h; ++y ) {
- pixels = (Uint16 *)icon->pixels +
- y*icon->pitch/2;
- for ( x=0; x<icon->w; ++x ) {
- if ( *pixels++ == colorkey ) {
- SET_MASKBIT(icon, x, y, mask);
- }
- }
- }
- }
- break;
- case 4: { Uint32 *pixels;
- for ( y=0; y<icon->h; ++y ) {
- pixels = (Uint32 *)icon->pixels +
- y*icon->pitch/4;
- for ( x=0; x<icon->w; ++x ) {
- if ( *pixels++ == colorkey ) {
- SET_MASKBIT(icon, x, y, mask);
- }
- }
- }
- }
- break;
- }
- }
- /*
- * Sets the window manager icon for the display window.
- */
- void SDL_WM_SetIcon (SDL_Surface *icon, Uint8 *mask)
- {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- if ( icon && video->SetIcon ) {
- /* Generate a mask if necessary, and create the icon! */
- if ( mask == NULL ) {
- int mask_len = icon->h*(icon->w+7)/8;
- mask = (Uint8 *)malloc(mask_len);
- if ( mask == NULL ) {
- return;
- }
- memset(mask, ~0, mask_len);
- if ( icon->flags & SDL_SRCCOLORKEY ) {
- CreateMaskFromColorKey(icon, mask);
- }
- video->SetIcon(video, icon, mask);
- free(mask);
- } else {
- video->SetIcon(this, icon, mask);
- }
- }
- }
- /*
- * Grab or ungrab the keyboard and mouse input.
- * This function returns the final grab mode after calling the
- * driver dependent function.
- */
- static SDL_GrabMode SDL_WM_GrabInputRaw(SDL_GrabMode mode)
- {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- /* Only do something if we have support for grabs */
- if ( video->GrabInput == NULL ) {
- return(video->input_grab);
- }
- /* If the final grab mode if off, only then do we actually grab */
- #ifdef DEBUG_GRAB
- printf("SDL_WM_GrabInputRaw(%d) ... ", mode);
- #endif
- if ( mode == SDL_GRAB_OFF ) {
- if ( video->input_grab != SDL_GRAB_OFF ) {
- mode = video->GrabInput(this, mode);
- }
- } else {
- if ( video->input_grab == SDL_GRAB_OFF ) {
- mode = video->GrabInput(this, mode);
- }
- }
- if ( mode != video->input_grab ) {
- video->input_grab = mode;
- if ( video->CheckMouseMode ) {
- video->CheckMouseMode(this);
- }
- }
- #ifdef DEBUG_GRAB
- printf("Final mode %dn", video->input_grab);
- #endif
- /* Return the final grab state */
- if ( mode >= SDL_GRAB_FULLSCREEN ) {
- mode -= SDL_GRAB_FULLSCREEN;
- }
- return(mode);
- }
- SDL_GrabMode SDL_WM_GrabInput(SDL_GrabMode mode)
- {
- SDL_VideoDevice *video = current_video;
- /* If the video isn't initialized yet, we can't do anything */
- if ( ! video ) {
- return SDL_GRAB_OFF;
- }
- /* Return the current mode on query */
- if ( mode == SDL_GRAB_QUERY ) {
- mode = video->input_grab;
- if ( mode >= SDL_GRAB_FULLSCREEN ) {
- mode -= SDL_GRAB_FULLSCREEN;
- }
- return(mode);
- }
- #ifdef DEBUG_GRAB
- printf("SDL_WM_GrabInput(%d) ... ", mode);
- #endif
- /* If the video surface is fullscreen, we always grab */
- if ( mode >= SDL_GRAB_FULLSCREEN ) {
- mode -= SDL_GRAB_FULLSCREEN;
- }
- if ( SDL_VideoSurface && (SDL_VideoSurface->flags & SDL_FULLSCREEN) ) {
- mode += SDL_GRAB_FULLSCREEN;
- }
- return(SDL_WM_GrabInputRaw(mode));
- }
- static SDL_GrabMode SDL_WM_GrabInputOff(void)
- {
- SDL_GrabMode mode;
- /* First query the current grab state */
- mode = SDL_WM_GrabInput(SDL_GRAB_QUERY);
- /* Now explicitly turn off input grab */
- SDL_WM_GrabInputRaw(SDL_GRAB_OFF);
- /* Return the old state */
- return(mode);
- }
- /*
- * Iconify the window in window managed environments.
- * A successful iconification will result in an SDL_APPACTIVE loss event.
- */
- int SDL_WM_IconifyWindow(void)
- {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- int retval;
- retval = 0;
- if ( video->IconifyWindow ) {
- retval = video->IconifyWindow(this);
- }
- return(retval);
- }
- /*
- * Toggle fullscreen mode
- */
- int SDL_WM_ToggleFullScreen(SDL_Surface *surface)
- {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- int toggled;
- toggled = 0;
- if ( SDL_PublicSurface && (surface == SDL_PublicSurface) &&
- video->ToggleFullScreen ) {
- if ( surface->flags & SDL_FULLSCREEN ) {
- toggled = video->ToggleFullScreen(this, 0);
- if ( toggled ) {
- SDL_VideoSurface->flags &= ~SDL_FULLSCREEN;
- SDL_PublicSurface->flags &= ~SDL_FULLSCREEN;
- }
- } else {
- toggled = video->ToggleFullScreen(this, 1);
- if ( toggled ) {
- SDL_VideoSurface->flags |= SDL_FULLSCREEN;
- SDL_PublicSurface->flags |= SDL_FULLSCREEN;
- }
- }
- /* Double-check the grab state inside SDL_WM_GrabInput() */
- if ( toggled ) {
- SDL_WM_GrabInput(video->input_grab);
- }
- }
- return(toggled);
- }
- /*
- * Get some platform dependent window manager information
- */
- int SDL_GetWMInfo (SDL_SysWMinfo *info)
- {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- if ( video && video->GetWMInfo ) {
- return(video->GetWMInfo(this, info));
- } else {
- return(0);
- }
- }