sdl_ph_image.c

SDL库 在进行视频显示程序spcaview安装时必须的库文件

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    [e-mail]
*/
#include "SDL_config.h"

#include <Ph.h>
#include <photon/Pg.h>

#include "SDL_endian.h"
#include "SDL_video.h"
#include "../SDL_pixels_c.h"
#include "SDL_ph_video.h"
#include "SDL_ph_image_c.h"
#include "SDL_ph_modes_c.h"
#include "SDL_ph_gl.h"

int ph_SetupImage(_THIS, SDL_Surface *screen)
{
    PgColor_t* palette=NULL;
    int type=0;
    int bpp;
    
    bpp=screen->format->BitsPerPixel;

    /* Determine image type */
    switch(bpp)
    {
        case 8:{
            type = Pg_IMAGE_PALETTE_BYTE;
        }
        break;
        case 15:{
            type = Pg_IMAGE_DIRECT_555; 
        }
        break;
        case 16:{
            type = Pg_IMAGE_DIRECT_565; 
        }
        break;
        case 24:{
            type = Pg_IMAGE_DIRECT_888;
        }
        break;
        case 32:{
            type = Pg_IMAGE_DIRECT_8888;
        }
        break;
        default:{
            SDL_SetError("ph_SetupImage(): unsupported bpp=%d !\n", bpp);
            return -1;
        }
        break;
    }

    /* palette emulation code */
    if ((bpp==8) && (desktoppal==SDLPH_PAL_EMULATE))
    {
        /* creating image palette */
        palette=SDL_malloc(_Pg_MAX_PALETTE*sizeof(PgColor_t));
        if (palette==NULL)
        {
            SDL_SetError("ph_SetupImage(): can't allocate memory for palette !\n");
            return -1;
        }
        PgGetPalette(palette);

        /* using shared memory for speed (set last param to 1) */
        if ((SDL_Image = PhCreateImage(NULL, screen->w, screen->h, type, palette, _Pg_MAX_PALETTE, 1)) == NULL)
        {
            SDL_SetError("ph_SetupImage(): PhCreateImage() failed for bpp=8 !\n");
            SDL_free(palette);
            return -1;
        }
    }
    else
    {
        /* using shared memory for speed (set last param to 1) */
        if ((SDL_Image = PhCreateImage(NULL, screen->w, screen->h, type, NULL, 0, 1)) == NULL)
        {
            SDL_SetError("ph_SetupImage(): PhCreateImage() failed for bpp=%d !\n", bpp);
            return -1;
        }
    }

    screen->pixels = SDL_Image->image;
    screen->pitch = SDL_Image->bpl;

    this->UpdateRects = ph_NormalUpdate;

    return 0;
}

int ph_SetupOCImage(_THIS, SDL_Surface *screen)
{
    int type = 0;
    int bpp;

    OCImage.flags = screen->flags;
    
    bpp=screen->format->BitsPerPixel;

    /* Determine image type */
    switch(bpp)
    {
        case 8: {
                    type = Pg_IMAGE_PALETTE_BYTE;
                }
                break;
        case 15:{
                    type = Pg_IMAGE_DIRECT_555; 
		}
		break;
        case 16:{
                    type = Pg_IMAGE_DIRECT_565; 
                }
                break;
        case 24:{
                    type = Pg_IMAGE_DIRECT_888;
                }
                break;
        case 32:{
                    type = Pg_IMAGE_DIRECT_8888;
                }
                break;
        default:{
                    SDL_SetError("ph_SetupOCImage(): unsupported bpp=%d !\n", bpp);
                    return -1;
                }
                break;
    }

    /* Currently offscreen contexts with the same bit depth as display bpp only can be created */
    OCImage.offscreen_context = PdCreateOffscreenContext(0, screen->w, screen->h, Pg_OSC_MEM_PAGE_ALIGN);

    if (OCImage.offscreen_context == NULL)
    {
        SDL_SetError("ph_SetupOCImage(): PdCreateOffscreenContext() function failed !\n");
        return -1;
    }

    screen->pitch = OCImage.offscreen_context->pitch;

    OCImage.dc_ptr = (unsigned char *)PdGetOffscreenContextPtr(OCImage.offscreen_context);

    if (OCImage.dc_ptr == NULL)
    {
        SDL_SetError("ph_SetupOCImage(): PdGetOffscreenContextPtr function failed !\n");
        PhDCRelease(OCImage.offscreen_context);
        return -1;
    }

    OCImage.FrameData0 = OCImage.dc_ptr;
    OCImage.CurrentFrameData = OCImage.FrameData0;
    OCImage.current = 0;

    PhDCSetCurrent(OCImage.offscreen_context);

    screen->pixels = OCImage.CurrentFrameData;

    this->UpdateRects = ph_OCUpdate;

    return 0;
}

int ph_SetupFullScreenImage(_THIS, SDL_Surface* screen)
{
    OCImage.flags = screen->flags;

    /* Begin direct and fullscreen mode */
    if (!ph_EnterFullScreen(this, screen, PH_ENTER_DIRECTMODE))
    {
        return -1;
    }

    /* store palette for fullscreen */
    if ((screen->format->BitsPerPixel==8) && (desktopbpp!=8))
    {
        PgGetPalette(savedpal);
        PgGetPalette(syspalph);
    }

    OCImage.offscreen_context = PdCreateOffscreenContext(0, 0, 0, Pg_OSC_MAIN_DISPLAY | Pg_OSC_MEM_PAGE_ALIGN | Pg_OSC_CRTC_SAFE);
    if (OCImage.offscreen_context == NULL)
    {
        SDL_SetError("ph_SetupFullScreenImage(): PdCreateOffscreenContext() function failed !\n");
        return -1;
    }
    
    if ((screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF)
    {
        OCImage.offscreen_backcontext = PdDupOffscreenContext(OCImage.offscreen_context, Pg_OSC_MEM_PAGE_ALIGN | Pg_OSC_CRTC_SAFE);
        if (OCImage.offscreen_backcontext == NULL)
        {
            SDL_SetError("ph_SetupFullScreenImage(): PdCreateOffscreenContext(back) function failed !\n");
            return -1;
        }
    }

    OCImage.FrameData0 = (unsigned char *)PdGetOffscreenContextPtr(OCImage.offscreen_context);
    if (OCImage.FrameData0 == NULL)
    {
        SDL_SetError("ph_SetupFullScreenImage(): PdGetOffscreenContextPtr() function failed !\n");
        ph_DestroyImage(this, screen);
        return -1;
    }

    if ((screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF)
    {
        OCImage.FrameData1 = (unsigned char *)PdGetOffscreenContextPtr(OCImage.offscreen_backcontext);
        if (OCImage.FrameData1 == NULL)
        {
            SDL_SetError("ph_SetupFullScreenImage(back): PdGetOffscreenContextPtr() function failed !\n");
            ph_DestroyImage(this, screen);
            return -1;
        }
    }

    /* wait for the hardware */
    PgFlush();
    PgWaitHWIdle();

    if ((screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF)
    {
        OCImage.current = 0;
        PhDCSetCurrent(OCImage.offscreen_context);
        screen->pitch = OCImage.offscreen_context->pitch;
        screen->pixels = OCImage.FrameData0;
        
        /* emulate 640x400 videomode */
        if (videomode_emulatemode==1)
        {
           int i;
           
           for (i=0; i<40; i++)
           {
              SDL_memset(screen->pixels+screen->pitch*i, 0x00, screen->pitch);
           }
           for (i=440; i<480; i++)
           {
              SDL_memset(screen->pixels+screen->pitch*i, 0x00, screen->pitch);
           }
           screen->pixels+=screen->pitch*40;
        }
        PgSwapDisplay(OCImage.offscreen_backcontext, 0);
    }
    else
    {
        OCImage.current = 0;
        PhDCSetCurrent(OCImage.offscreen_context);
        screen->pitch = OCImage.offscreen_context->pitch;
        screen->pixels = OCImage.FrameData0;

        /* emulate 640x400 videomode */
        if (videomode_emulatemode==1)
        {
           int i;
           
           for (i=0; i<40; i++)
           {
              SDL_memset(screen->pixels+screen->pitch*i, 0x00, screen->pitch);
           }
           for (i=440; i<480; i++)
           {
              SDL_memset(screen->pixels+screen->pitch*i, 0x00, screen->pitch);
           }
           screen->pixels+=screen->pitch*40;
        }
    }

    this->UpdateRects = ph_OCDCUpdate;

    /* wait for the hardware */
    PgFlush();
    PgWaitHWIdle();

    return 0;
}

#if SDL_VIDEO_OPENGL

int ph_SetupOpenGLImage(_THIS, SDL_Surface* screen)
{
    this->UpdateRects = ph_OpenGLUpdate;
    screen->pixels=NULL;
    screen->pitch=NULL;

    #if (_NTO_VERSION >= 630)
        if ((screen->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN)
        {
            if (!ph_EnterFullScreen(this, screen, PH_IGNORE_DIRECTMODE))
            {
                screen->flags &= ~SDL_FULLSCREEN;
                return -1;
            }
        }
    #endif /* 6.3.0 */

    if (ph_SetupOpenGLContext(this, screen->w, screen->h, screen->format->BitsPerPixel, screen->flags)!=0)
    {
        screen->flags &= ~SDL_OPENGL;
        return -1;
    }
   
    return 0;
}

#endif /* SDL_VIDEO_OPENGL */

void ph_DestroyImage(_THIS, SDL_Surface* screen)
{

#if SDL_VIDEO_OPENGL
    if ((screen->flags & SDL_OPENGL)==SDL_OPENGL)
    {
        if (oglctx)
        {
            #if (_NTO_VERSION < 630)
                PhDCSetCurrent(NULL);
                PhDCRelease(oglctx);
            #else
                qnxgl_context_destroy(oglctx);
                qnxgl_buffers_destroy(oglbuffers);
                qnxgl_finish();
            #endif /* 6.3.0 */
            oglctx=NULL;
            oglbuffers=NULL;
            oglflags=0;
            oglbpp=0;
        }

        #if (_NTO_VERSION >= 630)
            if (currently_fullscreen)
            {
                ph_LeaveFullScreen(this);
            }
        #endif /* 6.3.0 */

        return;
    }
#endif /* SDL_VIDEO_OPENGL */

    if (currently_fullscreen)
    {
        /* if we right now in 8bpp fullscreen we must release palette */
        if ((screen->format->BitsPerPixel==8) && (desktopbpp!=8))
        {
            PgSetPalette(syspalph, 0, -1, 0, 0, 0);
            PgSetPalette(savedpal, 0, 0, _Pg_MAX_PALETTE, Pg_PALSET_GLOBAL | Pg_PALSET_FORCE_EXPOSE, 0);
            PgFlush();
        }
        ph_LeaveFullScreen(this);
    }

    if (OCImage.offscreen_context != NULL)
    {
        PhDCRelease(OCImage.offscreen_context);
        OCImage.offscreen_context = NULL;
        OCImage.FrameData0 = NULL;
    }
    if (OCImage.offscreen_backcontext != NULL)
    {
        PhDCRelease(OCImage.offscreen_backcontext);
        OCImage.offscreen_backcontext = NULL;
        OCImage.FrameData1 = NULL;
    }
    OCImage.CurrentFrameData = NULL;

    if (SDL_Image)
    {
        /* if palette allocated, free it */
        if (SDL_Image->palette)
        {
            SDL_free(SDL_Image->palette);
        }
        PgShmemDestroy(SDL_Image->image);
        SDL_free(SDL_Image);
    }

    /* Must be zeroed everytime */
    SDL_Image = NULL;

    if (screen)
    {
        screen->pixels = NULL;
    }
}

int ph_UpdateHWInfo(_THIS)
{
    PgVideoModeInfo_t vmode;
    PgHWCaps_t hwcaps;

    /* Update video ram amount */
    if (PgGetGraphicsHWCaps(&hwcaps) < 0)
    {
        SDL_SetError("ph_UpdateHWInfo(): GetGraphicsHWCaps() function failed !\n");
        return -1;
    }
    this->info.video_mem=hwcaps.currently_available_video_ram/1024;

    /* obtain current mode capabilities */
    if (PgGetVideoModeInfo(hwcaps.current_video_mode, &vmode) < 0)
    {
        SDL_SetError("ph_UpdateHWInfo(): GetVideoModeInfo() function failed !\n");
        return -1;
    }

    if ((vmode.mode_capabilities1 & PgVM_MODE_CAP1_OFFSCREEN) == PgVM_MODE_CAP1_OFFSCREEN)
    {
        /* this is a special test for drivers which tries to lie about offscreen capability */
        if (hwcaps.currently_available_video_ram!=0)
        {
           this->info.hw_available = 1;
        }
        else
        {
           this->info.hw_available = 0;
        }
    }
    else
    {
        this->info.hw_available = 0;
    }

    if ((vmode.mode_capabilities2 & PgVM_MODE_CAP2_RECTANGLE) == PgVM_MODE_CAP2_RECTANGLE)
    {
        this->info.blit_fill = 1;
    }
    else
    {
        this->info.blit_fill = 0;
    }

    if ((vmode.mode_capabilities2 & PgVM_MODE_CAP2_BITBLT) == PgVM_MODE_CAP2_BITBLT)
    {
        this->info.blit_hw = 1;
    }
    else
    {
        this->info.blit_hw = 0;
    }

    if ((vmode.mode_capabilities2 & PgVM_MODE_CAP2_ALPHA_BLEND) == PgVM_MODE_CAP2_ALPHA_BLEND)
    {
        this->info.blit_hw_A = 1;
    }
    else
    {
        this->info.blit_hw_A = 0;
    }
    
    if ((vmode.mode_capabilities2 & PgVM_MODE_CAP2_CHROMA) == PgVM_MODE_CAP2_CHROMA)
    {
        this->info.blit_hw_CC = 1;
    }
    else
    {
        this->info.blit_hw_CC = 0;
    }
    
    return 0;
}

int ph_SetupUpdateFunction(_THIS, SDL_Surface* screen, Uint32 flags)
{
    int setupresult=-1;

    ph_DestroyImage(this, screen);
    
#if SDL_VIDEO_OPENGL
    if ((flags & SDL_OPENGL)==SDL_OPENGL)
    {
        setupresult=ph_SetupOpenGLImage(this, screen);
    }
    else
    {
#endif
       if ((flags & SDL_FULLSCREEN)==SDL_FULLSCREEN)
       {
           setupresult=ph_SetupFullScreenImage(this, screen);
       }
       else
       {
          if ((flags & SDL_HWSURFACE)==SDL_HWSURFACE)
          {
              setupresult=ph_SetupOCImage(this, screen);
          }
          else
          {
              setupresult=ph_SetupImage(this, screen);
          }
       }
#if SDL_VIDEO_OPENGL
    }
#endif
    if (setupresult!=-1)
    {
       ph_UpdateHWInfo(this);
    }
    
    return setupresult;
}

int ph_AllocHWSurface(_THIS, SDL_Surface* surface)
{
    PgHWCaps_t hwcaps;

    if (surface->hwdata!=NULL)
    {
       SDL_SetError("ph_AllocHWSurface(): hwdata already exists!\n");
       return -1;
    }