vo_gl.c

来自「君正早期ucos系统(只有早期的才不没有打包成库),MPLAYER,文件系统,图」· C语言 代码 · 共 1,019 行 · 第 1/3 页

      sx = sy = 512;
      BindTexture(gl_target, largeeosdtex[1]);
      smalltexcur++;
    } else {
      texSize(i->w, i->h, &sx, &sy);
      BindTexture(gl_target, *curtex++);
    }
    glDrawTex(i->dst_x, i->dst_y, i->w, i->h, x, y, i->w, i->h, sx, sy, use_rectangle == 1, 0, 0);
  }
  glEndList();
  BindTexture(gl_target, 0);
}

/**
 * \brief uninitialize OpenGL context, freeing textures, buffers etc.
 */
static void uninitGl(void) {
  int i = 0;
  if (DeletePrograms && fragprog)
    DeletePrograms(1, &fragprog);
  fragprog = 0;
  while (default_texs[i] != 0)
    i++;
  if (i)
    glDeleteTextures(i, default_texs);
  default_texs[0] = 0;
  clearOSD();
  clearEOSD();
  if (largeeosdtex[0])
    glDeleteTextures(2, largeeosdtex);
  largeeosdtex[0] = 0;
  if (DeleteBuffers && gl_buffer)
    DeleteBuffers(1, &gl_buffer);
  gl_buffer = 0; gl_buffersize = 0;
  gl_bufferptr = NULL;
  err_shown = 0;
}

/**
 * \brief Initialize a (new or reused) OpenGL context.
 * set global gl-related variables to their default values
 */
static int initGl(uint32_t d_width, uint32_t d_height) {
  texSize(image_width, image_height, &texture_width, &texture_height);

  glDisable(GL_BLEND); 
  glDisable(GL_DEPTH_TEST);
  glDepthMask(GL_FALSE);
  glDisable(GL_CULL_FACE);
  glEnable(gl_target);
  glDrawBuffer(vo_doublebuffering?GL_BACK:GL_FRONT);
  glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);

  mp_msg(MSGT_VO, MSGL_V, "[gl] Creating %dx%d texture...\n",
          texture_width, texture_height);

  if (image_format == IMGFMT_YV12) {
    int i;
    glGenTextures(21, default_texs);
    default_texs[21] = 0;
    for (i = 0; i < 7; i++) {
      ActiveTexture(GL_TEXTURE1 + i);
      BindTexture(GL_TEXTURE_2D, default_texs[i]);
      BindTexture(GL_TEXTURE_RECTANGLE, default_texs[i + 7]);
      BindTexture(GL_TEXTURE_3D, default_texs[i + 14]);
    }
    ActiveTexture(GL_TEXTURE1);
    glCreateClearTex(gl_target, gl_texfmt, GL_LINEAR,
                     texture_width / 2, texture_height / 2, 128);
    ActiveTexture(GL_TEXTURE2);
    glCreateClearTex(gl_target, gl_texfmt, GL_LINEAR,
                     texture_width / 2, texture_height / 2, 128);
    switch (use_yuv) {
      case YUV_CONVERSION_FRAGMENT_LOOKUP:
      case YUV_CONVERSION_FRAGMENT_POW:
      case YUV_CONVERSION_FRAGMENT:
        if (!GenPrograms || !BindProgram) {
          mp_msg(MSGT_VO, MSGL_ERR, "[gl] fragment program functions missing!\n");
          break;
        }
        GenPrograms(1, &fragprog);
        BindProgram(GL_FRAGMENT_PROGRAM, fragprog);
        break;
    }
    ActiveTexture(GL_TEXTURE0);
    BindTexture(gl_target, 0);
    update_yuvconv();
  }
  glCreateClearTex(gl_target, gl_texfmt, GL_LINEAR,
                   texture_width, texture_height, 0);

  resize(d_width, d_height);

  glClearColor( 0.0f,0.0f,0.0f,0.0f );
  glClear( GL_COLOR_BUFFER_BIT );
  if (SwapInterval && swap_interval >= 0)
    SwapInterval(swap_interval);
  return 1;
}

/* connect to server, create and map window,
 * allocate colors and (shared) memory
 */
static int 
config(uint32_t width, uint32_t height, uint32_t d_width, uint32_t d_height, uint32_t flags, char *title, uint32_t format)
{
  image_height = height;
  image_width = width;
  image_format = format;
  glFindFormat(format, NULL, &gl_texfmt, &gl_format, &gl_type);

  int_pause = 0;
  vo_flipped = !!(flags & VOFLAG_FLIPPING);

#ifdef HAVE_NEW_GUI
  if (use_gui) {
    // GUI creates and manages window for us
    guiGetEvent(guiSetShVideo, 0);
#ifndef GL_WIN32
    goto glconfig;
#endif
  }
#endif
#ifdef GL_WIN32
  if (!vo_w32_config(d_width, d_height, flags))
    return -1;
#else
  if (WinID >= 0) {
    vo_window = WinID ? (Window)WinID : mRootWin;
    vo_x11_selectinput_witherr(mDisplay, vo_window,
             StructureNotifyMask | KeyPressMask | PointerMotionMask |
             ButtonPressMask | ButtonReleaseMask | ExposureMask);
    goto glconfig;
  }
  {
    XVisualInfo *vinfo=glXChooseVisual( mDisplay,mScreen,wsGLXAttrib );
    if (vinfo == NULL)
    {
      mp_msg(MSGT_VO, MSGL_ERR, "[gl] no GLX support present\n");
      return -1;
    }

    vo_x11_create_vo_window(vinfo, vo_dx, vo_dy, d_width, d_height, flags,
            XCreateColormap(mDisplay, mRootWin, vinfo->visual, AllocNone),
            "gl", title);
  }
#endif

glconfig:
  if (vo_config_count)
    uninitGl();
  setGlWindow(&gl_vinfo, &gl_context, vo_window);
  initGl(vo_dwidth, vo_dheight);

  return 0;
}

static void check_events(void)
{
    int e=vo_check_events();
    if(e&VO_EVENT_RESIZE) resize(vo_dwidth,vo_dheight);
    if(e&VO_EVENT_EXPOSE && int_pause) flip_page();
}

/**
 * Creates the textures and the display list needed for displaying
 * an OSD part.
 * Callback function for vo_draw_text().
 */
static void create_osd_texture(int x0, int y0, int w, int h,
                                 unsigned char *src, unsigned char *srca,
                                 int stride)
{
  // initialize to 8 to avoid special-casing on alignment
  int sx = 8, sy = 8;
  GLint scale_type = (scaled_osd) ? GL_LINEAR : GL_NEAREST;

  if (w <= 0 || h <= 0 || stride < w) {
    mp_msg(MSGT_VO, MSGL_V, "Invalid dimensions OSD for part!\n");
    return;
  }
  texSize(w, h, &sx, &sy);

  if (osdtexCnt >= MAX_OSD_PARTS) {
    mp_msg(MSGT_VO, MSGL_ERR, "Too many OSD parts, contact the developers!\n");
    return;
  }

  // create Textures for OSD part
  glGenTextures(1, &osdtex[osdtexCnt]);
  BindTexture(gl_target, osdtex[osdtexCnt]);
  glCreateClearTex(gl_target, GL_LUMINANCE, scale_type, sx, sy, 0);
  glUploadTex(gl_target, GL_LUMINANCE, GL_UNSIGNED_BYTE, src, stride,
              0, 0, w, h, 0);

#ifndef FAST_OSD
  glGenTextures(1, &osdatex[osdtexCnt]);
  BindTexture(gl_target, osdatex[osdtexCnt]);
  glCreateClearTex(gl_target, GL_ALPHA, scale_type, sx, sy, 255);
  {
  int i;
  char *tmp = malloc(stride * h);
  // convert alpha from weird MPlayer scale.
  // in-place is not possible since it is reused for future OSDs
  for (i = h * stride - 1; i >= 0; i--)
    tmp[i] = srca[i] - 1;
  glUploadTex(gl_target, GL_ALPHA, GL_UNSIGNED_BYTE, tmp, stride,
              0, 0, w, h, 0);
  free(tmp);
  }
#endif

  BindTexture(gl_target, 0);

  // Create a list for rendering this OSD part
#ifndef FAST_OSD
  osdaDispList[osdtexCnt] = glGenLists(1);
  glNewList(osdaDispList[osdtexCnt], GL_COMPILE);
  // render alpha
  BindTexture(gl_target, osdatex[osdtexCnt]);
  glDrawTex(x0, y0, w, h, 0, 0, w, h, sx, sy, use_rectangle == 1, 0, 0);
  glEndList();
#endif
  osdDispList[osdtexCnt] = glGenLists(1);
  glNewList(osdDispList[osdtexCnt], GL_COMPILE);
  // render OSD
  BindTexture(gl_target, osdtex[osdtexCnt]);
  glDrawTex(x0, y0, w, h, 0, 0, w, h, sx, sy, use_rectangle == 1, 0, 0);
  glEndList();

  osdtexCnt++;
}

static void draw_osd(void)
{
  if (!use_osd) return;
  if (vo_osd_changed(0)) {
    int osd_h, osd_w;
    clearOSD();
    osd_w = (scaled_osd) ? image_width : vo_dwidth;
    osd_h = (scaled_osd) ? image_height : vo_dheight;
    vo_draw_text(osd_w, osd_h, create_osd_texture);
  }
}

static void
flip_page(void)
{
//  glEnable(GL_TEXTURE_2D);
//  glBindTexture(GL_TEXTURE_2D, texture_id);

  glColor3f(1,1,1);
  if (image_format == IMGFMT_YV12)
    glEnableYUVConversion(gl_target, yuvconvtype);
  glDrawTex(0, 0, image_width, image_height,
            0, 0, image_width, image_height,
            texture_width, texture_height,
            use_rectangle == 1, image_format == IMGFMT_YV12,
            mpi_flipped ^ vo_flipped);
  if (image_format == IMGFMT_YV12)
    glDisableYUVConversion(gl_target, yuvconvtype);

  if (osdtexCnt > 0 || eosdDispList) {
    // set special rendering parameters
    if (!scaled_osd) {
      glMatrixMode(GL_PROJECTION);
      glPushMatrix();
      glLoadIdentity();
      glOrtho(0, vo_dwidth, vo_dheight, 0, -1, 1);
    }
    glEnable(GL_BLEND);
    if (eosdDispList) {
      glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
      glCallList(eosdDispList);
    }
    if (osdtexCnt > 0) {
      glColor4ub((osd_color >> 16) & 0xff, (osd_color >> 8) & 0xff, osd_color & 0xff, 0xff);
      // draw OSD
#ifndef FAST_OSD
      glBlendFunc(GL_ZERO, GL_SRC_ALPHA);
      glCallLists(osdtexCnt, GL_UNSIGNED_INT, osdaDispList);
#endif
      glBlendFunc(GL_ONE, GL_ONE);
      glCallLists(osdtexCnt, GL_UNSIGNED_INT, osdDispList);
    }
    // set rendering parameters back to defaults
    glDisable (GL_BLEND);
    if (!scaled_osd)
      glPopMatrix();
    BindTexture(gl_target, 0);
  }

  if (use_glFinish)
  glFinish();
  if (vo_doublebuffering)
    swapGlBuffers();
  else if (!use_glFinish)
    glFlush();
 
  if (vo_fs && use_aspect && vo_doublebuffering)
    glClear(GL_COLOR_BUFFER_BIT);
}

//static inline uint32_t draw_slice_x11(uint8_t *src[], uint32_t slice_num)
static int draw_slice(uint8_t *src[], int stride[], int w,int h,int x,int y)
{
  mpi_flipped = (stride[0] < 0);
  glUploadTex(gl_target, gl_format, gl_type, src[0], stride[0],
              x, y, w, h, slice_height);
  if (image_format == IMGFMT_YV12) {
    ActiveTexture(GL_TEXTURE1);
    glUploadTex(gl_target, gl_format, gl_type, src[1], stride[1],
                x / 2, y / 2, w / 2, h / 2, slice_height);
    ActiveTexture(GL_TEXTURE2);
    glUploadTex(gl_target, gl_format, gl_type, src[2], stride[2],
                x / 2, y / 2, w / 2, h / 2, slice_height);
    ActiveTexture(GL_TEXTURE0);
  }
  return 0;
}

static uint32_t get_image(mp_image_t *mpi) {
  if (!GenBuffers || !BindBuffer || !BufferData || !MapBuffer) {
    if (!err_shown)
      mp_msg(MSGT_VO, MSGL_ERR, "[gl] extensions missing for dr\n"
                                "Expect a _major_ speed penalty\n");
    err_shown = 1;
    return VO_FALSE;
  }
  if (mpi->flags & MP_IMGFLAG_READABLE) return VO_FALSE;
  if (mpi->type == MP_IMGTYPE_IP || mpi->type == MP_IMGTYPE_IPB)
    return VO_FALSE; // we can not provide readable buffers
  if (!gl_buffer)
    GenBuffers(1, &gl_buffer);
  BindBuffer(GL_PIXEL_UNPACK_BUFFER, gl_buffer);
  mpi->stride[0] = mpi->width * mpi->bpp / 8;
  if (mpi->stride[0] * mpi->h > gl_buffersize) {
    BufferData(GL_PIXEL_UNPACK_BUFFER, mpi->stride[0] * mpi->h,
               NULL, GL_DYNAMIC_DRAW);
    gl_buffersize = mpi->stride[0] * mpi->h;