sdl_ph_video.c

Simple DirectMedia Layer - Simple DirectMedia Layer 是一个跨平台的多媒体库设计用来提供快速图形framebuffer和音频驱动。应用MPEG为软件

               desktoppal=SDLPH_PAL_SYSTEM;
            }
            
            /* save old video mode caps */
            PgGetVideoMode(&settings);
            old_video_mode=settings.mode;
            old_refresh_rate=settings.refresh;

            /* setup new video mode */
            settings.mode = mode;
            settings.refresh = 0;
            settings.flags = 0;

            if (PgSetVideoMode(&settings) < 0)
            {
                fprintf(stderr,"ph_SetVideoMode(): PgSetVideoMode failed !\n");
            }

            current->flags = (flags & (~SDL_RESIZABLE)); /* no resize for Direct Context */

            /* Begin direct mode */
            ph_EnterFullScreen(this);

        } /* end fullscreen flag */
        else
        {
            /* Use offscreen memory iff SDL_HWSURFACE flag is set */
            if (flags & SDL_HWSURFACE)
            {
                /* no stretch blit in offscreen context */
                current->flags = (flags & (~SDL_RESIZABLE));
            }

            /* using palette emulation code in window mode */
            if (bpp==8)
            {
                if (desktopbpp>=15)
                {
                    desktoppal=SDLPH_PAL_EMULATE;
                }
                else
                {
                    desktoppal=SDLPH_PAL_SYSTEM;
                }
            }
            else
            {
               desktoppal=SDLPH_PAL_NONE;
            }
        }

	/* If we are setting video to use the palette make sure we have allocated memory for it */
	if (bpp==8)
	{
            current->format->palette = malloc(sizeof(SDL_Palette));
            memset(current->format->palette, 0, sizeof(SDL_Palette));
            current->format->palette->ncolors = 256;
            current->format->palette->colors = (SDL_Color *)malloc(256 *sizeof(SDL_Color));
            /* fill the palette */
            rtnval = PgGetPalette(ph_palette);

            tempptr = (unsigned long *)current->format->palette->colors;

            for(i=0; i<256; i++)
            {
                *tempptr = (((unsigned long)ph_palette[i]) << 8);
                tempptr++;
            }
        }

    }

    current->w = width;
    current->h = height;
    current->format->BitsPerPixel = bpp;
    current->format->BytesPerPixel = (bpp+7)/8;
    current->pitch = SDL_CalculatePitch(current);

    /* Must call at least once it setup image planes */
    rtnval = ph_ResizeImage(this, current, flags);
    
    if (rtnval==-1)
    {
        fprintf(stderr,"ph_SetVideoMode(): ph_ResizeImage failed !\n");
        return NULL;
    }

    /* delayed set caption call */
    if (captionflag)
    {
        ph_SetCaption(this, this->wm_title, NULL);
    }

    /* finish window drawing */
    PtFlush();

    SDL_Unlock_EventThread();

    /* We're done! */
    return (current);
}

static void ph_VideoQuit(_THIS)
{
#ifdef HAVE_OPENGL
    PhRegion_t region_info;
#endif /* HAVE_OPENGL */

    ph_DestroyImage(this, SDL_VideoSurface); 

    if (currently_fullscreen)
    {
        ph_LeaveFullScreen(this);
    }

#ifdef HAVE_OPENGL
    /* prevent double SEGFAULT during parachute mode */
    if (this->screen)
    {
        if (((this->screen->flags & SDL_FULLSCREEN)==SDL_FULLSCREEN) &&
            ((this->screen->flags & SDL_OPENGL)==SDL_OPENGL))
        {
            region_info.cursor_type=Ph_CURSOR_POINTER;
            region_info.rid=PtWidgetRid(window);
            PhRegionChange(Ph_REGION_CURSOR, 0, &region_info, NULL, NULL);
        }
    }

    PtFlush();
#endif /* HAVE_OPENGL */
    
    if (window)
    {
        PtUnrealizeWidget(window);
        PtDestroyWidget(window);
        window=NULL;
    }
    
    /* restore palette */
    if (desktoppal!=SDLPH_PAL_NONE)
    {
        PgSetPalette(ph_palette, 0, 0, _Pg_MAX_PALETTE, Pg_PALSET_GLOBAL | Pg_PALSET_FORCE_EXPOSE, 0);
    }

#ifdef HAVE_OPENGL
    if (oglctx)
    {
        PhDCSetCurrent(NULL);
        PhDCRelease(oglctx);
        oglctx=NULL;
    }
#endif /* HAVE_OPENGL */
}

static int ph_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
{
    int i;
    PhPoint_t point={0, 0};
    PgColor_t syspalph[_Pg_MAX_PALETTE];

    /* palette emulation code, using palette of the PhImage_t struct */
    if (desktoppal==SDLPH_PAL_EMULATE)
    {
        if ((SDL_Image) && (SDL_Image->palette))
        {
            for (i=firstcolor; i<firstcolor+ncolors; i++)
            {
                SDL_Image->palette[i]  = 0x00000000UL;
                SDL_Image->palette[i] |= colors[i-firstcolor].r<<16;
                SDL_Image->palette[i] |= colors[i-firstcolor].g<<8;
                SDL_Image->palette[i] |= colors[i-firstcolor].b;
            }

           /* image needs to be redrawed, very slow method */
           PgDrawPhImage(&point, SDL_Image, 0);
        }
    }
    else
    {
        if (desktoppal==SDLPH_PAL_SYSTEM)
        {
            for (i=firstcolor; i<firstcolor+ncolors; i++)
            {
                syspalph[i]  = 0x00000000UL;
                syspalph[i] |= colors[i-firstcolor].r<<16;
                syspalph[i] |= colors[i-firstcolor].g<<8;
                syspalph[i] |= colors[i-firstcolor].b;
            }

            if ((this->screen->flags & SDL_FULLSCREEN) != SDL_FULLSCREEN)
            {
                /* window mode must use soft palette */
                PgSetPalette((PgColor_t*)&syspalph[firstcolor], 0, firstcolor, ncolors, Pg_PALSET_SOFT, 0);
                /* image needs to be redrawed, very slow method */
                if (SDL_Image)
                {
                   PgDrawPhImage(&point, SDL_Image, 0);
                }
            }
            else
            {
                /* fullscreen mode must use hardware palette */
                PgSetPalette((PgColor_t*)&syspalph[firstcolor], 0, firstcolor, ncolors, Pg_PALSET_GLOBAL, 0);
            }
        }
        else
        {
            /* SDLPH_PAL_NONE do nothing */
        }
    }
    
    return 1;
}

#ifdef HAVE_OPENGL

int ph_SetupOpenGLContext(_THIS, int width, int height, int bpp, Uint32 flags)
{
    PtArg_t args[8];
    PhDim_t dim;
    uint64_t OGLAttrib[PH_OGL_MAX_ATTRIBS];
    int OGLargc;
    int pargc;

    dim.w=width;
    dim.h=height;
    
    if (oglctx!=NULL)
    {
       PhDCSetCurrent(NULL);
       PhDCRelease(oglctx);
       oglctx=NULL;
    }

    OGLargc=0;
    if (this->gl_config.depth_size)
    {
        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_DEPTH_BITS;
        OGLAttrib[OGLargc++]=this->gl_config.depth_size;
    }
    if (this->gl_config.stencil_size)
    {
        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_STENCIL_BITS;
        OGLAttrib[OGLargc++]=this->gl_config.stencil_size;
    }
    OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FORCE_SW;
    if (flags & SDL_FULLSCREEN)
    {
        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FULLSCREEN;
        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_DIRECT;
        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FULLSCREEN_BEST;
        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FULLSCREEN_CENTER;
    }
    OGLAttrib[OGLargc++]=PHOGL_ATTRIB_NONE;

    if (this->gl_config.double_buffer)
    {
        oglctx=PdCreateOpenGLContext(2, &dim, 0, OGLAttrib);
    }
    else
    {
        oglctx=PdCreateOpenGLContext(1, &dim, 0, OGLAttrib);
    }

    if (oglctx==NULL)
    {
        fprintf(stderr,"ph_SetupOpenGLContext(): cannot create OpenGL context.\n");
        return (-1);
    }

    PhDCSetCurrent(oglctx);

    pargc=0;

    PtSetArg(&args[pargc++], Pt_ARG_DIM, &dim, 0);
    PtSetArg(&args[pargc++], Pt_ARG_RESIZE_FLAGS, Pt_FALSE, Pt_RESIZE_XY_AS_REQUIRED);
    PtSetArg(&args[pargc++], Pt_ARG_FILL_COLOR, Pg_BLACK, 0);

    if (flags & SDL_FULLSCREEN)
    {
        PhPoint_t pos;

        pos.x=0;
        pos.y=0;

        PtSetArg(&args[pargc++], Pt_ARG_WINDOW_RENDER_FLAGS, Pt_FALSE, ~0);
        PtSetArg(&args[pargc++], Pt_ARG_WINDOW_MANAGED_FLAGS, Pt_TRUE, Ph_WM_FFRONT | Ph_WM_CLOSE | Ph_WM_TOFRONT | Ph_WM_CONSWITCH);
        PtSetArg(&args[pargc++], Pt_ARG_WINDOW_STATE, Pt_TRUE, Ph_WM_STATE_ISFRONT | Ph_WM_STATE_ISFOCUS);
        PtSetArg(&args[pargc++], Pt_ARG_POS, &pos, 0);
    }
    else
    {
        /* remove border and caption if no frame flag selected */
        if ((flags & SDL_NOFRAME) == SDL_NOFRAME)
        {
            PtSetArg(&args[pargc++], Pt_ARG_WINDOW_RENDER_FLAGS, 0, Ph_WM_RENDER_TITLE | Ph_WM_RENDER_BORDER);
        }
        else
        {
           /* if window is not resizable then remove resize handles */
           if ((flags & SDL_RESIZABLE) != SDL_RESIZABLE)
           {
               PtSetArg(&args[pargc++], Pt_ARG_WINDOW_RENDER_FLAGS, 0, Ph_WM_RENDER_RESIZE);
           }
        }
    }

    if (window!=NULL)
    {
        PtUnrealizeWidget(window);
        PtDestroyWidget(window);
        window=NULL;
    }

    window=PtCreateWidget(PtWindow, NULL, pargc, args);
    PtRealizeWidget(window);

    /* disable mouse for fullscreen */
    if (flags & SDL_FULLSCREEN)
    {
        PhRegion_t region_info;

        region_info.cursor_type=Ph_CURSOR_NONE;
        region_info.rid=PtWidgetRid(window);
        PhRegionChange(Ph_REGION_CURSOR, 0, &region_info, NULL, NULL);
    }

    PtFlush();

    return 0;
}

void ph_GL_SwapBuffers(_THIS)
{
    PgSetRegion(PtWidgetRid(window));
    PdOpenGLContextSwapBuffers(oglctx);
}

int ph_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
{
    switch (attrib)
    {
        case SDL_GL_DOUBLEBUFFER:
             *value=this->gl_config.double_buffer;
             break;
        case SDL_GL_STENCIL_SIZE:
             *value=this->gl_config.stencil_size;
             break;
        case SDL_GL_DEPTH_SIZE:
             *value=this->gl_config.depth_size;
             break;
        default:
             *value=0;
             return(-1);
    }
    return 0;
}

#endif /* HAVE_OPENGL */