path: root/libvo/vo_gl.c

/*
 * This file is part of MPlayer.
 *
 * MPlayer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MPlayer 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#include "config.h"
#include "mp_msg.h"
#include "subopt-helper.h"
#include "video_out.h"
#include "video_out_internal.h"
#include "font_load.h"
#include "sub.h"

#include "gl_common.h"
#include "aspect.h"
#ifdef CONFIG_GUI
#include "gui/interface.h"
#endif
#include "fastmemcpy.h"
#include "libass/ass.h"
#include "libass/ass_mp.h"

static const vo_info_t info =
{
  "X11 (OpenGL)",
  "gl",
  "Arpad Gereoffy <arpi@esp-team.scene.hu>",
  ""
};

const LIBVO_EXTERN(gl)

#ifdef GL_WIN32
static int gl_vinfo = 0;
static HGLRC gl_context = 0;
#define update_xinerama_info w32_update_xinerama_info
#define vo_init vo_w32_init
#define vo_window vo_w32_window
#else
static XVisualInfo *gl_vinfo = NULL;
static GLXContext gl_context = 0;
static int                  wsGLXAttrib[] = { GLX_RGBA,
                                       GLX_RED_SIZE,1,
                                       GLX_GREEN_SIZE,1,
                                       GLX_BLUE_SIZE,1,
                                       GLX_DOUBLEBUFFER,
                                       None };
#endif

static int use_osd;
static int scaled_osd;
//! How many parts the OSD may consist of at most
#define MAX_OSD_PARTS 20
//! Textures for OSD
static GLuint osdtex[MAX_OSD_PARTS];
#ifndef FAST_OSD
//! Alpha textures for OSD
static GLuint osdatex[MAX_OSD_PARTS];
#endif
static GLuint *eosdtex;
#define LARGE_EOSD_TEX_SIZE 512
#define TINYTEX_SIZE 16
#define TINYTEX_COLS (LARGE_EOSD_TEX_SIZE/TINYTEX_SIZE)
#define TINYTEX_MAX (TINYTEX_COLS*TINYTEX_COLS)
#define SMALLTEX_SIZE 32
#define SMALLTEX_COLS (LARGE_EOSD_TEX_SIZE/SMALLTEX_SIZE)
#define SMALLTEX_MAX (SMALLTEX_COLS*SMALLTEX_COLS)
static GLuint largeeosdtex[2];
//! Display lists that draw the OSD parts
static GLuint osdDispList[MAX_OSD_PARTS];
#ifndef FAST_OSD
static GLuint osdaDispList[MAX_OSD_PARTS];
#endif
static GLuint eosdDispList;
//! How many parts the OSD currently consists of
static int osdtexCnt;
static int eosdtexCnt;
static int osd_color;

static int use_aspect;
static int use_ycbcr;
static int use_yuv;
static int lscale;
static int cscale;
static float filter_strength;
static int yuvconvtype;
static int use_rectangle;
static int err_shown;
static uint32_t image_width;
static uint32_t image_height;
static uint32_t image_format;
static int many_fmts;
static int ati_hack;
static int force_pbo;
static int mesa_buffer;
static int use_glFinish;
static int swap_interval;
static GLenum gl_target;
static GLint gl_texfmt;
static GLenum gl_format;
static GLenum gl_type;
static GLuint gl_buffer;
static GLuint gl_buffer_uv[2];
static int gl_buffersize;
static int gl_buffersize_uv;
static void *gl_bufferptr;
static void *gl_bufferptr_uv[2];
static int mesa_buffersize;
static void *mesa_bufferptr;
static GLuint fragprog;
static GLuint default_texs[22];
static char *custom_prog;
static char *custom_tex;
static int custom_tlin;
static int custom_trect;

static int int_pause;
static int eq_bri = 0;
static int eq_cont = 0;
static int eq_sat = 0;
static int eq_hue = 0;
static int eq_rgamma = 0;
static int eq_ggamma = 0;
static int eq_bgamma = 0;

static int texture_width;
static int texture_height;
static int mpi_flipped;
static int vo_flipped;
static int ass_border_x, ass_border_y;

static unsigned int slice_height = 1;

static void redraw(void);

static void resize(int x,int y){
  mp_msg(MSGT_VO, MSGL_V, "[gl] Resize: %dx%d\n",x,y);
  if (WinID >= 0) {
    int top = 0, left = 0, w = x, h = y;
    geometry(&top, &left, &w, &h, vo_screenwidth, vo_screenheight);
    glViewport(top, left, w, h);
  } else
  glViewport( 0, 0, x, y );

  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  ass_border_x = ass_border_y = 0;
  if (aspect_scaling() && use_aspect) {
    int new_w, new_h;
    GLdouble scale_x, scale_y;
    aspect(&new_w, &new_h, A_WINZOOM);
    panscan_calc_windowed();
    new_w += vo_panscan_x;
    new_h += vo_panscan_y;
    scale_x = (GLdouble)new_w / (GLdouble)x;
    scale_y = (GLdouble)new_h / (GLdouble)y;
    glScaled(scale_x, scale_y, 1);
    ass_border_x = (vo_dwidth - new_w) / 2;
    ass_border_y = (vo_dheight - new_h) / 2;
  }
  glOrtho(0, image_width, image_height, 0, -1,1);

  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();

  if (!scaled_osd) {
#ifdef CONFIG_FREETYPE
  // adjust font size to display size
  force_load_font = 1;
#endif
  vo_osd_changed(OSDTYPE_OSD);
  }
  glClear(GL_COLOR_BUFFER_BIT);
  redraw();
}

static void texSize(int w, int h, int *texw, int *texh) {
  if (use_rectangle) {
    *texw = w; *texh = h;
  } else {
    *texw = 32;
    while (*texw < w)
      *texw *= 2;
    *texh = 32;
    while (*texh < h)
      *texh *= 2;
  }
  if (mesa_buffer) *texw = (*texw + 63) & ~63;
  else if (ati_hack) *texw = (*texw + 511) & ~511;
}

//! maximum size of custom fragment program
#define MAX_CUSTOM_PROG_SIZE (1024 * 1024)
static void update_yuvconv(void) {
  float bri = eq_bri / 100.0;
  float cont = (eq_cont + 100) / 100.0;
  float hue = eq_hue / 100.0 * 3.1415927;
  float sat = (eq_sat + 100) / 100.0;
  float rgamma = exp(log(8.0) * eq_rgamma / 100.0);
  float ggamma = exp(log(8.0) * eq_ggamma / 100.0);
  float bgamma = exp(log(8.0) * eq_bgamma / 100.0);
  gl_conversion_params_t params = {gl_target, yuvconvtype,
      bri, cont, hue, sat, rgamma, ggamma, bgamma,
      texture_width, texture_height, filter_strength};
  glSetupYUVConversion(&params);
  if (custom_prog) {
    FILE *f = fopen(custom_prog, "r");
    if (!f)
      mp_msg(MSGT_VO, MSGL_WARN,
             "[gl] Could not read customprog %s\n", custom_prog);
    else {
      char *prog = calloc(1, MAX_CUSTOM_PROG_SIZE + 1);
      fread(prog, 1, MAX_CUSTOM_PROG_SIZE, f);
      fclose(f);
      loadGPUProgram(GL_FRAGMENT_PROGRAM, prog);
      free(prog);
    }
    ProgramEnvParameter4f(GL_FRAGMENT_PROGRAM, 0,
               1.0 / texture_width, 1.0 / texture_height,
               texture_width, texture_height);
  }
  if (custom_tex) {
    FILE *f = fopen(custom_tex, "r");
    if (!f)
      mp_msg(MSGT_VO, MSGL_WARN,
             "[gl] Could not read customtex %s\n", custom_tex);
    else {
      int width, height, maxval;
      ActiveTexture(GL_TEXTURE3);
      if (glCreatePPMTex(custom_trect?GL_TEXTURE_RECTANGLE:GL_TEXTURE_2D, 0,
                     custom_tlin?GL_LINEAR:GL_NEAREST,
                     f, &width, &height, &maxval))
        ProgramEnvParameter4f(GL_FRAGMENT_PROGRAM, 1,
                   1.0 / width, 1.0 / height, width, height);
      else
        mp_msg(MSGT_VO, MSGL_WARN,
               "[gl] Error parsing customtex %s\n", custom_tex);
      fclose(f);
      ActiveTexture(GL_TEXTURE0);
    }
  }
}

/**
 * \brief remove all OSD textures and display-lists, thus clearing it.
 */
static void clearOSD(void) {
  int i;
  if (!osdtexCnt)
    return;
  glDeleteTextures(osdtexCnt, osdtex);
#ifndef FAST_OSD
  glDeleteTextures(osdtexCnt, osdatex);
  for (i = 0; i < osdtexCnt; i++)
    glDeleteLists(osdaDispList[i], 1);
#endif
  for (i = 0; i < osdtexCnt; i++)
    glDeleteLists(osdDispList[i], 1);
  osdtexCnt = 0;
}

/**
 * \brief remove textures, display list and free memory used by EOSD
 */
static void clearEOSD(void) {
  if (eosdDispList)
    glDeleteLists(eosdDispList, 1);
  eosdDispList = 0;
  if (eosdtexCnt)
    glDeleteTextures(eosdtexCnt, eosdtex);
  eosdtexCnt = 0;
  free(eosdtex);
  eosdtex = NULL;
}

static void do_render_osd(int);

static inline int is_tinytex(ass_image_t *i, int tinytexcur) {
  return i->w < TINYTEX_SIZE && i->h < TINYTEX_SIZE && tinytexcur < TINYTEX_MAX;
}

static inline int is_smalltex(ass_image_t *i, int smalltexcur) {
  return i->w < SMALLTEX_SIZE && i->h < SMALLTEX_SIZE && smalltexcur < SMALLTEX_MAX;
}

static inline void tinytex_pos(int tinytexcur, int *x, int *y) {
  *x = (tinytexcur % TINYTEX_COLS) * TINYTEX_SIZE;
  *y = (tinytexcur / TINYTEX_COLS) * TINYTEX_SIZE;
}

static inline void smalltex_pos(int smalltexcur, int *x, int *y) {
  *x = (smalltexcur % SMALLTEX_COLS) * SMALLTEX_SIZE;
  *y = (smalltexcur / SMALLTEX_COLS) * SMALLTEX_SIZE;
}

/**
 * \brief construct display list from ass image list
 * \param img image list to create OSD from.
 *            A value of NULL has the same effect as clearEOSD()
 */
static void genEOSD(mp_eosd_images_t *imgs) {
  int sx, sy;
  int tinytexcur = 0;
  int smalltexcur = 0;
  GLuint *curtex;
  GLint scale_type = scaled_osd ? GL_LINEAR : GL_NEAREST;
  ass_image_t *img = imgs->imgs;
  ass_image_t *i;

  if (imgs->changed == 0) // there are elements, but they are unchanged
      return;
  if (img && imgs->changed == 1) // there are elements, but they just moved
      goto skip_upload;

  clearEOSD();
  if (!img)
    return;
  if (!largeeosdtex[0]) {
    glGenTextures(2, largeeosdtex);
    BindTexture(gl_target, largeeosdtex[0]);
    glCreateClearTex(gl_target, GL_ALPHA, GL_ALPHA, GL_UNSIGNED_BYTE, scale_type, LARGE_EOSD_TEX_SIZE, LARGE_EOSD_TEX_SIZE, 0);
    BindTexture(gl_target, largeeosdtex[1]);
    glCreateClearTex(gl_target, GL_ALPHA, GL_ALPHA, GL_UNSIGNED_BYTE, scale_type, LARGE_EOSD_TEX_SIZE, LARGE_EOSD_TEX_SIZE, 0);
  }
  for (i = img; i; i = i->next)
  {
    if (i->w <= 0 || i->h <= 0 || i->stride < i->w)
      continue;
    if (is_tinytex(i, tinytexcur))
      tinytexcur++;
    else if (is_smalltex(i, smalltexcur))
      smalltexcur++;
    else
      eosdtexCnt++;
  }
  mp_msg(MSGT_VO, MSGL_DBG2, "EOSD counts (tiny, small, all): %i, %i, %i\n",
         tinytexcur, smalltexcur, eosdtexCnt);
  if (eosdtexCnt) {
    eosdtex = calloc(eosdtexCnt, sizeof(GLuint));
    glGenTextures(eosdtexCnt, eosdtex);
  }
  tinytexcur = smalltexcur = 0;
  for (i = img, curtex = eosdtex; i; i = i->next) {
    int x = 0, y = 0;
    if (i->w <= 0 || i->h <= 0 || i->stride < i->w) {
      mp_msg(MSGT_VO, MSGL_V, "Invalid dimensions OSD for part!\n");
      continue;
    }
    if (is_tinytex(i, tinytexcur)) {
      tinytex_pos(tinytexcur, &x, &y);
      BindTexture(gl_target, largeeosdtex[0]);
      tinytexcur++;
    } else if (is_smalltex(i, smalltexcur)) {
      smalltex_pos(smalltexcur, &x, &y);
      BindTexture(gl_target, largeeosdtex[1]);
      smalltexcur++;
    } else {
      texSize(i->w, i->h, &sx, &sy);
      BindTexture(gl_target, *curtex++);
      glCreateClearTex(gl_target, GL_ALPHA, GL_ALPHA, GL_UNSIGNED_BYTE, scale_type, sx, sy, 0);
    }
    glUploadTex(gl_target, GL_ALPHA, GL_UNSIGNED_BYTE, i->bitmap, i->stride,
                x, y, i->w, i->h, 0);
  }
  eosdDispList = glGenLists(1);
skip_upload:
  glNewList(eosdDispList, GL_COMPILE);
  tinytexcur = smalltexcur = 0;
  for (i = img, curtex = eosdtex; i; i = i->next) {
    int x = 0, y = 0;
    if (i->w <= 0 || i->h <= 0 || i->stride < i->w)
      continue;
    glColor4ub(i->color >> 24, (i->color >> 16) & 0xff, (i->color >> 8) & 0xff, 255 - (i->color & 0xff));
    if (is_tinytex(i, tinytexcur)) {
      tinytex_pos(tinytexcur, &x, &y);
      sx = sy = LARGE_EOSD_TEX_SIZE;
      BindTexture(gl_target, largeeosdtex[0]);
      tinytexcur++;
    } else if (is_smalltex(i, smalltexcur)) {
      smalltex_pos(smalltexcur, &x, &y);
      sx = sy = LARGE_EOSD_TEX_SIZE;
      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;
  if (DeleteBuffers && gl_buffer_uv[0])
    DeleteBuffers(2, gl_buffer_uv);
  gl_buffer_uv[0] = gl_buffer_uv[1] = 0; gl_buffersize_uv = 0;
  gl_bufferptr_uv[0] = gl_bufferptr_uv[1] = 0;
  if (mesa_bufferptr)
    FreeMemoryMESA(mDisplay, mScreen, mesa_bufferptr);
  mesa_bufferptr = NULL;
  err_shown = 0;
}

static void autodetectGlExtensions(void) {
  const char *extensions = glGetString(GL_EXTENSIONS);
  const char *vendor     = glGetString(GL_VENDOR);
  const char *version    = glGetString(GL_VERSION);
  int is_ati = strstr(vendor, "ATI") != NULL;
  int ati_broken_pbo = 0;
  if (is_ati && strncmp(version, "2.1.", 4) == 0) {
    int ver = atoi(version + 4);
    mp_msg(MSGT_VO, MSGL_V, "[gl] Detected ATI driver version: %i\n", ver);
    ati_broken_pbo = ver && ver < 8395;
  }
  if (ati_hack      == -1) ati_hack      = ati_broken_pbo;
  if (force_pbo     == -1) force_pbo     = strstr(extensions, "_pixel_buffer_object")      ? is_ati : 0;
  if (use_rectangle == -1) use_rectangle = strstr(extensions, "_texture_non_power_of_two") ?      0 : 0;
  if (is_ati && (lscale == 1 || lscale == 2 || cscale == 1 || cscale == 2))
    mp_msg(MSGT_VO, MSGL_WARN, "[gl] Selected scaling mode may be broken on ATI cards.\n"
             "Tell _them_ to fix GL_REPEAT if you have issues.\n");
  mp_msg(MSGT_VO, MSGL_V, "[gl] Settings after autodetection: ati-hack = %i, force-pbo = %i, rectangle = %i\n",
         ati_hack, force_pbo, use_rectangle);
}

/**
 * \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) {
  autodetectGlExtensions();
  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_format, gl_type, GL_LINEAR,
                     texture_width / 2, texture_height / 2, 128);
    ActiveTexture(GL_TEXTURE2);
    glCreateClearTex(gl_target, gl_texfmt, gl_format, gl_type, 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_format, gl_type, 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 CONFIG_GUI
  if (use_gui) {
    // GUI creates and manages window for us
    guiGetEvent(guiSetShVideo, 0);
    goto glconfig;
  }
#endif
#ifdef GL_WIN32
  if (!vo_w32_config(d_width, d_height, flags))
    return -1;
#else
  {
    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();
  if (setGlWindow(&gl_vinfo, &gl_context, vo_window) == SET_WINDOW_FAILED)
    return -1;
  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) redraw();
}

/**
 * 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