vo_opengl_old: remove this VO

At this point, there is probably no hardware left that doesn't do
OpenGL 2.1, and at the same time is fast enough to handle video.

8 files changed, 2 insertions, 2507 deletions

diff --git a/DOCS/man/vo.rst b/DOCS/man/vo.rst
index d56dec4caf..4d97a281c0 100644
--- a/DOCS/man/vo.rst
+++ b/DOCS/man/vo.rst
@@ -278,8 +278,7 @@ Available video output drivers are:
     ``opengl-hq`` to use this driver with defaults set to high quality
     rendering.
 
-    Requires at least OpenGL 2.1 and the ``GL_ARB_texture_rg`` extension. For
-    older drivers, ``opengl-old`` may work.
+    Requires at least OpenGL 2.1.
 
     Some features are available with OpenGL 3 capable graphics drivers only
     (or if the necessary extensions are available).
@@ -624,184 +623,6 @@ Available video output drivers are:
     float texture support, and some OS X setups being very slow with ``rgb16``
     but fast with ``rgb32f``.
 
-``opengl-old``
-    OpenGL video output driver, old version. Video size must be smaller
-    than the maximum texture size of your OpenGL implementation. Intended to
-    work even with the most basic OpenGL implementations, but also makes use
-    of newer extensions which allow support for more color spaces.
-
-    The code performs very few checks, so if a feature does not work, this
-    might be because it is not supported by your card and/or OpenGL
-    implementation, even if you do not get any error message. Use ``glxinfo``
-    or a similar tool to display the supported OpenGL extensions.
-
-    .. note:: This driver is for compatibility with old systems.
-
-    ``(no-)ati-hack``
-        ATI drivers may give a corrupted image when PBOs are used (when using
-        ``force-pbo``). This option fixes this, at the expense of using a bit
-        more memory.
-    ``(no-)force-pbo``
-        Always uses PBOs to transfer textures even if this involves an extra
-        copy. Currently this gives a little extra speed with NVIDIA drivers
-        and a lot more speed with ATI drivers. May need the ``ati-hack``
-        suboption to work correctly.
-    ``(no-)scaled-osd``
-        Scales the OSD and subtitles instead of rendering them at display size
-        (default: disabled).
-    ``rectangle=<0,1,2>``
-        Select usage of rectangular textures, which saves video RAM, but often
-        is slower (default: 0).
-
-        0
-            Use power-of-two textures (default).
-        1
-            Use the ``GL_ARB_texture_rectangle`` extension.
-        2
-            Use the ``GL_ARB_texture_non_power_of_two`` extension. In some
-            cases only supported in software and thus very slow.
-
-    ``swapinterval=<n>``
-        Minimum interval between two buffer swaps, counted in displayed frames
-        (default: 1). 1 is equivalent to enabling VSYNC, 0 to disabling VSYNC.
-        Values below 0 will leave it at the system default. This limits the
-        framerate to (horizontal refresh rate / n). Requires
-        ``GLX_SGI_swap_control`` support to work. With some (most/all?)
-        implementations this only works in fullscreen mode.
-    ``ycbcr``
-        Use the ``GL_MESA_ycbcr_texture`` extension to convert YUV to RGB. In
-        most cases this is probably slower than doing software conversion to
-        RGB.
-    ``yuv=<n>``
-        Select the type of YUV to RGB conversion. The default is
-        auto-detection deciding between values 0 and 2.
-
-        0
-            Use software conversion. Compatible with all OpenGL versions.
-            Provides brightness, contrast and saturation control.
-        1
-            Same as 2. This used to use NVIDIA-specific extensions, which
-            did not provide any advantages over using fragment programs, except
-            possibly on very ancient graphics cards. It produced a gray-ish
-            output, which is why it has been removed.
-        2
-            Use a fragment program. Needs the ``GL_ARB_fragment_program``
-            extension and at least three texture units. Provides brightness,
-            contrast, saturation and hue control.
-        3
-            Use a fragment program using the ``POW`` instruction. Needs the
-            ``GL_ARB_fragment_program`` extension and at least three texture
-            units. Provides brightness, contrast, saturation, hue and gamma
-            control. Gamma can also be set independently for red, green and
-            blue. Method 4 is usually faster.
-        4
-            Use a fragment program with additional lookup. Needs the
-            ``GL_ARB_fragment_program`` extension and at least four texture
-            units. Provides brightness, contrast, saturation, hue and gamma
-            control. Gamma can also be set independently for red, green and
-            blue.
-        5
-            Removed. Used ATI-specific method (for older cards).
-        6
-            Use a 3D texture to do conversion via lookup. Needs the
-            ``GL_ARB_fragment_program extension`` and at least four texture
-            units. Extremely slow (software emulation) on some (all?) ATI
-            cards since it uses a texture with border pixels. Provides
-            brightness, contrast, saturation, hue and gamma control. Gamma can
-            also be set independently for red, green and blue. Speed depends
-            more on GPU memory bandwidth than other methods.
-
-    ``lscale=<n>``
-        Select the scaling function to use for luminance scaling. Only valid
-        for yuv modes 2, 3, 4 and 6.
-
-        0
-            Use simple linear filtering (default).
-        1
-            Use bicubic B-spline filtering (better quality). Needs one
-            additional texture unit. Older cards will not be able to handle
-            this for chroma at least in fullscreen mode.
-        2
-            Use cubic filtering in horizontal, linear filtering in vertical
-            direction. Works on a few more cards than method 1.
-        3
-            Same as 1 but does not use a lookup texture. Might be faster on
-            some cards.
-        4
-            Use experimental unsharp masking with 3x3 support and a default
-            strength of 0.5 (see ``filter-strength``).
-        5
-            Use experimental unsharp masking with 5x5 support and a default
-            strength of 0.5 (see ``filter-strength``).
-
-    ``cscale=<n>``
-        Select the scaling function to use for chrominance scaling. For
-        details see ``lscale``.
-    ``filter-strength=<value>``
-        Set the effect strength for the ``lscale``/``cscale`` filters that
-        support it.
-    ``stereo=<value>``
-        Select a method for stereo display. You may have to use
-        ``--video-aspect`` to fix the aspect value. Experimental, do not expect
-        too much from it.
-
-        0
-            Normal 2D display
-        1
-            Convert side by side input to full-color red-cyan stereo.
-        2
-            Convert side by side input to full-color green-magenta stereo.
-        3
-            Convert side by side input to quad buffered stereo. Only supported
-            by very few OpenGL cards.
-
-    The following options are only useful if writing your own fragment programs.
-
-    ``customprog=<filename>``
-        Load a custom fragment program from ``<filename>``.
-    ``customtex=<filename>``
-        Load a custom "gamma ramp" texture from ``<filename>``. This can be used
-        in combination with ``yuv=4`` or with the ``customprog`` option.
-    ``(no-)customtlin``
-        If enabled (default) use ``GL_LINEAR`` interpolation, otherwise use
-        ``GL_NEAREST`` for customtex texture.
-    ``(no-)customtrect``
-        If enabled, use ``texture_rectangle`` for the ``customtex`` texture.
-        Default is disabled.
-    ``(no-)mipmapgen``
-        If enabled, mipmaps for the video are automatically generated. This
-        should be useful together with the ``customprog`` and the ``TXB``
-        instruction to implement blur filters with a large radius. For most
-        OpenGL implementations, this is very slow for any non-RGB formats.
-        Default is disabled.
-
-    Normally there is no reason to use the following options; they mostly
-    exist for testing purposes.
-
-    ``(no-)glfinish``
-        Call ``glFinish()`` before swapping buffers. Slower but in some cases
-        more correct output (default: disabled).
-    ``(no-)manyfmts``
-        Enables support for more (RGB and BGR) color formats (default: enabled).
-        Needs OpenGL version >= 1.2.
-    ``slice-height=<0-...>``
-        Number of lines copied to texture in one piece (default: 0). 0 for
-        whole image.
-    ``sw``
-        Continue even if a software renderer is detected.
-
-    ``backend=<sys>``
-        auto
-            auto-select (default)
-        cocoa
-            Cocoa/OS X
-        win
-            Win32/WGL
-        x11
-            X11/GLX
-        wayland
-            Wayland/EGL
-
 ``sdl``
     SDL 2.0+ Render video output driver, depending on system with or without
     hardware acceleration. Should work on all platforms supported by SDL 2.0.
diff --git a/old-makefile b/old-makefile
index b3c97babe3..2d899ca7e2 100644
--- a/old-makefile
+++ b/old-makefile
@@ -63,9 +63,7 @@ SOURCES-$(GL)                   += video/out/gl_common.c video/out/gl_osd.c \
                                    video/out/vo_opengl.c video/out/gl_lcms.c \
                                    video/out/gl_video.c video/out/dither.c \
                                    video/out/gl_hwdec.c \
-                                   video/out/vo_opengl_cb.c \
-                                   video/out/vo_opengl_old.c \
-                                   video/out/pnm_loader.c
+                                   video/out/vo_opengl_cb.c
 
 SOURCES-$(ENCODING)             += video/out/vo_lavc.c audio/out/ao_lavc.c \
                                    common/encode_lavc.c
diff --git a/video/out/gl_common.c b/video/out/gl_common.c
index dcfaf32398..3eeef29ea5 100644
--- a/video/out/gl_common.c
+++ b/video/out/gl_common.c
@@ -960,8 +960,6 @@ MPGLContext *mpgl_init(struct vo *vo, const char *backend_name,
 
     if (gl_flavor >= 210 && !(ctx->gl->mpgl_caps & MPGL_CAP_GL21)) {
         MP_WARN(ctx->vo, "At least OpenGL 2.1 required.\n");
-        if (!vo->probing && (ctx->gl->mpgl_caps & MPGL_CAP_GL_LEGACY))
-            MP_WARN(ctx->vo, "Try with: --vo=opengl-old\n");
         goto cleanup;
     } else if (gl_flavor < 210 && !(ctx->gl->mpgl_caps & MPGL_CAP_GL_LEGACY)) {
         MP_WARN(ctx->vo, "OpenGL context creation failed!\n");
diff --git a/video/out/pnm_loader.c b/video/out/pnm_loader.c
deleted file mode 100644
index 70afe0fa23..0000000000
--- a/video/out/pnm_loader.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * PNM image files loader
- *
- * copyleft (C) 2005-2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
- *
- * 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.
- *
- * You can alternatively redistribute this file 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.
- */
-
-/**
- * \file pnm_loader.c
- * \brief PNM image files loader
- */
-
-#include <stdlib.h>
-#include <stdint.h>
-#include <stdio.h>
-#include "misc/ctype.h"
-#include "pnm_loader.h"
-
-/**
- * \brief skips whitespace and comments
- * \param f file to read from
- */
-static void ppm_skip(FILE *f) {
-  int c, comment = 0;
-  do {
-    c = fgetc(f);
-    if (c == '#')
-      comment = 1;
-    if (c == '\n')
-      comment = 0;
-  } while (c != EOF && (mp_isspace(c) || comment));
-  if (c != EOF)
-    ungetc(c, f);
-}
-
-#define MAXDIM (16 * 1024)
-
-uint8_t *read_pnm(FILE *f, int *width, int *height,
-                  int *bytes_per_pixel, int *maxval) {
-  uint8_t *data;
-  int type;
-  unsigned w, h, m, val, bpp;
-  *width = *height = *bytes_per_pixel = *maxval = 0;
-  ppm_skip(f);
-  if (fgetc(f) != 'P')
-    return NULL;
-  type = fgetc(f);
-  if (type != '5' && type != '6')
-    return NULL;
-  ppm_skip(f);
-  if (fscanf(f, "%u", &w) != 1)
-    return NULL;
-  ppm_skip(f);
-  if (fscanf(f, "%u", &h) != 1)
-    return NULL;
-  ppm_skip(f);
-  if (fscanf(f, "%u", &m) != 1)
-    return NULL;
-  val = fgetc(f);
-  if (!mp_isspace(val))
-    return NULL;
-  if (w > MAXDIM || h > MAXDIM)
-    return NULL;
-  bpp = (m > 255) ? 2 : 1;
-  if (type == '6')
-    bpp *= 3;
-  data = malloc(w * h * bpp);
-  if (fread(data, w * bpp, h, f) != h) {
-    free(data);
-    return NULL;
-  }
-  *width  = w;
-  *height = h;
-  *bytes_per_pixel = bpp;
-  *maxval = m;
-  return data;
-}
diff --git a/video/out/pnm_loader.h b/video/out/pnm_loader.h
deleted file mode 100644
index e00cce2e63..0000000000
--- a/video/out/pnm_loader.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * PNM image files loader
- *
- * 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.
- *
- * You can alternatively redistribute this file 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.
- */
-
-#ifndef MPLAYER_PNM_LOADER_H
-#define MPLAYER_PNM_LOADER_H
-
-#include <stdio.h>
-#include <stdint.h>
-
-/**
- * Read a "portable anymap" image.
- * Supports raw PGM (P5) and PNM (P6).
- *
- * @param[in]  f                input stream.
- * @param[out] width            width of the loaded image.
- * @param[out] height           height of the loaded image.
- * @param[out] bytes_per_pixel  format of the loaded image.
- * @param[out] maxval           maximum pixel value; possible values are:
- *                              1 for  8 bits gray,
- *                              2 for 16 bits gray,
- *                              3 for  8 bits per component RGB,
- *                              6 for 16 bits per component RGB.
- * @return                      a newly allocated array of
- *                              width*height*bytes_per_pixel bytes,
- *                              or NULL in case of error.
- */
-uint8_t *read_pnm(FILE *f, int *width, int *height,
-                  int *bytes_per_pixel, int *maxval);
-
-#endif /* MPLAYER_PNM_LOADER_H */
diff --git a/video/out/vo.c b/video/out/vo.c
index 251f32e6af..53a32a72ed 100644
--- a/video/out/vo.c
+++ b/video/out/vo.c
@@ -54,7 +54,6 @@ extern const struct vo_driver video_out_vdpau;
 extern const struct vo_driver video_out_xv;
 extern const struct vo_driver video_out_opengl;
 extern const struct vo_driver video_out_opengl_hq;
-extern const struct vo_driver video_out_opengl_old;
 extern const struct vo_driver video_out_opengl_cb;
 extern const struct vo_driver video_out_null;
 extern const struct vo_driver video_out_image;
@@ -84,9 +83,6 @@ const struct vo_driver *const video_out_drivers[] =
 #if HAVE_SDL2
         &video_out_sdl,
 #endif
-#if HAVE_GL
-        &video_out_opengl_old,
-#endif
 #if HAVE_VAAPI
         &video_out_vaapi,
 #endif
diff --git a/video/out/vo_opengl_old.c b/video/out/vo_opengl_old.c
deleted file mode 100644
index f39f5709cf..0000000000
--- a/video/out/vo_opengl_old.c
+++ /dev/null
@@ -1,2167 +0,0 @@
-/*
- * This file is part of MPlayer.
- *
- * Original author: Reimar Doeffinger <Reimar.Doeffinger@gmx.de>
- *
- * 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.
- *
- * You can alternatively redistribute this file 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.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <stdbool.h>
-#include <assert.h>
-
-#include "config.h"
-#include "talloc.h"
-#include "common/msg.h"
-#include "misc/ctype.h"
-#include "options/m_option.h"
-#include "vo.h"
-#include "video/vfcap.h"
-#include "video/mp_image.h"
-#include "sub/osd.h"
-
-#include "gl_common.h"
-#include "gl_osd.h"
-#include "video/memcpy_pic.h"
-#include "pnm_loader.h"
-
-//for gl_priv.use_yuv
-#define MASK_ALL_YUV (~(1 << YUV_CONVERSION_NONE))
-#define MASK_NOT_COMBINERS (~((1 << YUV_CONVERSION_NONE) | (1 << YUV_CONVERSION_COMBINERS)))
-#define MASK_GAMMA_SUPPORT (MASK_NOT_COMBINERS & ~(1 << YUV_CONVERSION_FRAGMENT))
-
-struct gl_priv {
-    MPGLContext *glctx;
-    GL *gl;
-
-    int allow_sw;
-
-    int scaled_osd;
-    struct mpgl_osd *osd;
-    int osd_color;
-    double osd_pts;
-
-    int use_ycbcr;
-    int use_yuv;
-    int is_yuv;
-    int lscale;
-    int cscale;
-    float filter_strength;
-    float noise_strength;
-    int yuvconvtype;
-    int use_rectangle;
-    int err_shown;
-    uint32_t image_width;
-    uint32_t image_height;
-    uint32_t image_format;
-    int many_fmts;
-    int have_texture_rg;
-    int max_tex_component_size;
-    int ati_hack;
-    int force_pbo;
-    int use_glFinish;
-    int swap_interval;
-    GLenum target;
-    GLint texfmt;
-    GLenum gl_format;
-    GLenum gl_type;
-    GLuint buffer;
-    GLuint buffer_uv[2];
-    int buffersize;
-    int buffersize_uv;
-    void *bufferptr;
-    void *bufferptr_uv[2];
-    GLuint fragprog;
-    GLuint default_texs[22];
-    char *custom_prog;
-    char *custom_tex;
-    int custom_tlin;
-    int custom_trect;
-    int mipmap_gen;
-    int stereo_mode;
-    char *backend_arg;
-
-    struct mp_csp_equalizer video_eq;
-
-    int texture_width;
-    int texture_height;
-    int mpi_flipped;
-    int vo_flipped;
-
-    struct mp_rect src_rect;    // displayed part of the source video
-    struct mp_rect dst_rect;    // video rectangle on output window
-    struct mp_osd_res osd_res;
-
-    int slice_height;
-};
-
-static int glFindFormat(uint32_t format, int have_texture_rg, int *bpp,
-                        GLint *gl_texfmt, GLenum *gl_format, GLenum *gl_type);
-static void glCreateClearTex(GL *gl, GLenum target, GLenum fmt, GLenum format,
-                             GLenum type, GLint filter, int w, int h,
-                             unsigned char val);
-static int glCreatePPMTex(GL *gl, GLenum target, GLenum fmt, GLint filter,
-                          FILE *f, int *width, int *height, int *maxval);
-static void glDrawTex(GL *gl, GLfloat x, GLfloat y, GLfloat w, GLfloat h,
-                      GLfloat tx, GLfloat ty, GLfloat tw, GLfloat th,
-                      int sx, int sy, int rect_tex, int is_yv12, int flip);
-static int loadGPUProgram(struct vo *vo, GL *gl, GLenum target, char *prog);
-//! do not use YUV conversion, this should always stay 0
-#define YUV_CONVERSION_NONE 0
-//! use nVidia specific register combiners for YUV conversion
-//! implementation has been removed
-#define YUV_CONVERSION_COMBINERS 1
-//! use a fragment program for YUV conversion
-#define YUV_CONVERSION_FRAGMENT 2
-//! use a fragment program for YUV conversion with gamma using POW
-#define YUV_CONVERSION_FRAGMENT_POW 3
-//! use a fragment program with additional table lookup for YUV conversion
-#define YUV_CONVERSION_FRAGMENT_LOOKUP 4
-//! use ATI specific register combiners ("fragment program")
-#define YUV_CONVERSION_COMBINERS_ATI 5
-//! use a fragment program with 3D table lookup for YUV conversion
-#define YUV_CONVERSION_FRAGMENT_LOOKUP3D 6
-//! use ATI specific "text" register combiners ("fragment program")
-#define YUV_CONVERSION_TEXT_FRAGMENT 7
-//! use normal bilinear scaling for textures
-#define YUV_SCALER_BILIN 0
-//! use higher quality bicubic scaling for textures
-#define YUV_SCALER_BICUB 1
-//! use cubic scaling in X and normal linear scaling in Y direction
-#define YUV_SCALER_BICUB_X 2
-//! use cubic scaling without additional lookup texture
-#define YUV_SCALER_BICUB_NOTEX 3
-#define YUV_SCALER_UNSHARP 4
-#define YUV_SCALER_UNSHARP2 5
-//! mask for conversion type
-#define YUV_CONVERSION_MASK 0xF
-//! mask for scaler type
-#define YUV_SCALER_MASK 0xF
-//! shift value for luminance scaler type
-#define YUV_LUM_SCALER_SHIFT 8
-//! shift value for chrominance scaler type
-#define YUV_CHROM_SCALER_SHIFT 12
-//! extract conversion out of type
-#define YUV_CONVERSION(t) ((t) & YUV_CONVERSION_MASK)
-//! extract luminance scaler out of type
-#define YUV_LUM_SCALER(t) (((t) >> YUV_LUM_SCALER_SHIFT) & YUV_SCALER_MASK)
-//! extract chrominance scaler out of type
-#define YUV_CHROM_SCALER(t) (((t) >> YUV_CHROM_SCALER_SHIFT) & YUV_SCALER_MASK)
-#define SET_YUV_CONVERSION(c)   ((c) & YUV_CONVERSION_MASK)
-#define SET_YUV_LUM_SCALER(s)   (((s) & YUV_SCALER_MASK) << YUV_LUM_SCALER_SHIFT)
-#define SET_YUV_CHROM_SCALER(s) (((s) & YUV_SCALER_MASK) << YUV_CHROM_SCALER_SHIFT)
-//! returns whether the yuv conversion supports large brightness range etc.
-static inline int glYUVLargeRange(int conv)
-{
-    switch (conv) {
-    case YUV_CONVERSION_NONE:
-    case YUV_CONVERSION_FRAGMENT_LOOKUP3D:
-    case YUV_CONVERSION_TEXT_FRAGMENT:
-        return 0;
-    }
-    return 1;
-}
-typedef struct {
-    GLenum target;
-    int type;
-    struct mp_csp_params csp_params;
-    int texw;
-    int texh;
-    int chrom_texw;
-    int chrom_texh;
-    float filter_strength;
-    float noise_strength;
-} gl_conversion_params_t;
-
-static int glAutodetectYUVConversion(GL *gl);
-static void glSetupYUVConversion(struct vo *vo, GL *gl,
-                                 gl_conversion_params_t *params);
-static void glEnableYUVConversion(GL *gl, GLenum target, int type);
-static void glDisableYUVConversion(GL *gl, GLenum target, int type);
-
-
-#define GL_3D_RED_CYAN        1
-#define GL_3D_GREEN_MAGENTA   2
-#define GL_3D_QUADBUFFER      3
-
-static void glEnable3DLeft(GL *gl, int type)
-{
-    GLint buffer;
-    switch (type) {
-    case GL_3D_RED_CYAN:
-        gl->ColorMask(GL_TRUE, GL_FALSE, GL_FALSE, GL_FALSE);
-        break;
-    case GL_3D_GREEN_MAGENTA:
-        gl->ColorMask(GL_FALSE, GL_TRUE, GL_FALSE, GL_FALSE);
-        break;
-    case GL_3D_QUADBUFFER:
-        gl->GetIntegerv(GL_DRAW_BUFFER, &buffer);
-        switch (buffer) {
-        case GL_FRONT:
-        case GL_FRONT_LEFT:
-        case GL_FRONT_RIGHT:
-            buffer = GL_FRONT_LEFT;
-            break;
-        case GL_BACK:
-        case GL_BACK_LEFT:
-        case GL_BACK_RIGHT:
-            buffer = GL_BACK_LEFT;
-            break;
-        }
-        gl->DrawBuffer(buffer);
-        break;
-    }
-}
-
-static void glEnable3DRight(GL *gl, int type)
-{
-    GLint buffer;
-    switch (type) {
-    case GL_3D_RED_CYAN:
-        gl->ColorMask(GL_FALSE, GL_TRUE, GL_TRUE, GL_FALSE);
-        break;
-    case GL_3D_GREEN_MAGENTA:
-        gl->ColorMask(GL_TRUE, GL_FALSE, GL_TRUE, GL_FALSE);
-        break;
-    case GL_3D_QUADBUFFER:
-        gl->GetIntegerv(GL_DRAW_BUFFER, &buffer);
-        switch (buffer) {
-        case GL_FRONT:
-        case GL_FRONT_LEFT:
-        case GL_FRONT_RIGHT:
-            buffer = GL_FRONT_RIGHT;
-            break;
-        case GL_BACK:
-        case GL_BACK_LEFT:
-        case GL_BACK_RIGHT:
-            buffer = GL_BACK_RIGHT;
-            break;
-        }
-        gl->DrawBuffer(buffer);
-        break;
-    }
-}
-
-static void glDisable3D(GL *gl, int type)
-{
-    GLint buffer;
-    switch (type) {
-    case GL_3D_RED_CYAN:
-    case GL_3D_GREEN_MAGENTA:
-        gl->ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
-        break;
-    case GL_3D_QUADBUFFER:
-        gl->DrawBuffer(GL_BACK);
-        gl->GetIntegerv(GL_DRAW_BUFFER, &buffer);
-        switch (buffer) {
-        case GL_FRONT:
-        case GL_FRONT_LEFT:
-        case GL_FRONT_RIGHT:
-            buffer = GL_FRONT;
-            break;
-        case GL_BACK:
-        case GL_BACK_LEFT:
-        case GL_BACK_RIGHT:
-            buffer = GL_BACK;
-            break;
-        }
-        gl->DrawBuffer(buffer);
-        break;
-    }
-}
-
-//! always return this format as internal texture format in glFindFormat
-#define TEXTUREFORMAT_ALWAYS GL_RGB8
-#undef TEXTUREFORMAT_ALWAYS
-
-/**
- * \brief find the OpenGL settings coresponding to format.
- *
- * All parameters may be NULL.
- * \param fmt MPlayer format to analyze.
- * \param dummy reserved
- * \param gl_texfmt [OUT] internal texture format that fits the
- * image format, not necessarily the best for performance.
- * \param gl_format [OUT] OpenGL format for this image format.
- * \param gl_type [OUT] OpenGL type for this image format.
- * \return 1 if format is supported by OpenGL, 0 if not.
- * \ingroup gltexture
- */
-static int glFindFormat(uint32_t fmt, int have_texture_rg, int *dummy,
-                        GLint *gl_texfmt, GLenum *gl_format, GLenum *gl_type)
-{
-    int supported = 1;
-    GLenum dummy2;
-    GLint dummy3;
-    if (!gl_texfmt)
-        gl_texfmt = &dummy3;
-    if (!gl_format)
-        gl_format = &dummy2;
-    if (!gl_type)
-        gl_type = &dummy2;
-
-    struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(fmt);
-    if (desc.flags & MP_IMGFLAG_YUV_P) {
-        // reduce the possible cases a bit
-        if (desc.plane_bits > 8)
-            fmt = IMGFMT_420P16;
-        else
-            fmt = IMGFMT_420P;
-    }
-
-    *gl_texfmt = 3;
-    switch (fmt) {
-    case IMGFMT_RGB48:
-        *gl_format = GL_RGB;
-        *gl_type = GL_UNSIGNED_SHORT;
-        break;
-    case IMGFMT_RGB24:
-        *gl_format = GL_RGB;
-        *gl_type = GL_UNSIGNED_BYTE;
-        break;
-    case IMGFMT_RGBA:
-        *gl_texfmt = 4;
-        *gl_format = GL_RGBA;
-        *gl_type = GL_UNSIGNED_BYTE;
-        break;
-    case IMGFMT_420P16:
-        supported = 0; // no native YUV support
-        *gl_texfmt = have_texture_rg ? GL_R16 : GL_LUMINANCE16;
-        *gl_format = have_texture_rg ? GL_RED : GL_LUMINANCE;
-        *gl_type = GL_UNSIGNED_SHORT;
-        break;
-    case IMGFMT_420P:
-        supported = 0; // no native YV12 support
-    case IMGFMT_Y8:
-        *gl_texfmt = 1;
-        *gl_format = GL_LUMINANCE;
-        *gl_type = GL_UNSIGNED_BYTE;
-        break;
-    case IMGFMT_UYVY:
-        *gl_texfmt = GL_YCBCR_MESA;
-        *gl_format = GL_YCBCR_MESA;
-        *gl_type = fmt == IMGFMT_UYVY ? GL_UNSIGNED_SHORT_8_8 : GL_UNSIGNED_SHORT_8_8_REV;
-        break;
-#if 0
-    // we do not support palettized formats, although the format the
-    // swscale produces works
-    case IMGFMT_RGB8:
-        *gl_format = GL_RGB;
-        *gl_type = GL_UNSIGNED_BYTE_2_3_3_REV;
-        break;
-#endif
-    case IMGFMT_BGR555:
-        *gl_format = GL_RGBA;
-        *gl_type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
-        break;
-    case IMGFMT_BGR565:
-        *gl_format = GL_RGB;
-        *gl_type = GL_UNSIGNED_SHORT_5_6_5_REV;
-        break;
-#if 0
-    case IMGFMT_BGR8:
-        // special case as red and blue have a different number of bits.
-        // GL_BGR and GL_UNSIGNED_BYTE_3_3_2 isn't supported at least
-        // by nVidia drivers, and in addition would give more bits to
-        // blue than to red, which isn't wanted
-        *gl_format = GL_RGB;
-        *gl_type = GL_UNSIGNED_BYTE_3_3_2;
-        break;
-#endif
-    case IMGFMT_RGB555:
-        *gl_format = GL_BGRA;
-        *gl_type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
-        break;
-    case IMGFMT_RGB565:
-        *gl_format = GL_RGB;
-        *gl_type = GL_UNSIGNED_SHORT_5_6_5;
-        break;
-    case IMGFMT_BGR24:
-        *gl_format = GL_BGR;
-        *gl_type = GL_UNSIGNED_BYTE;
-        break;
-    case IMGFMT_BGRA:
-        *gl_texfmt = 4;
-        *gl_format = GL_BGRA;
-        *gl_type = GL_UNSIGNED_BYTE;
-        break;
-    default:
-        *gl_texfmt = 4;
-        *gl_format = GL_RGBA;
-        *gl_type = GL_UNSIGNED_BYTE;
-        supported = 0;
-    }
-#ifdef TEXTUREFORMAT_ALWAYS
-    *gl_texfmt = TEXTUREFORMAT_ALWAYS;
-#endif
-    return supported;
-}
-
-/**
- * \brief create a texture and set some defaults
- * \param target texture taget, usually GL_TEXTURE_2D
- * \param fmt internal texture format
- * \param format texture host data format
- * \param type texture host data type
- * \param filter filter used for scaling, e.g. GL_LINEAR
- * \param w texture width
- * \param h texture height
- * \param val luminance value to fill texture with
- * \ingroup gltexture
- */
-static void glCreateClearTex(GL *gl, GLenum target, GLenum fmt, GLenum format,
-                             GLenum type, GLint filter, int w, int h,
-                             unsigned char val)
-{
-    GLfloat fval = (GLfloat)val / 255.0;
-    GLfloat border[4] = {
-        fval, fval, fval, fval
-    };
-    int stride;
-    char *init;
-    if (w == 0)
-        w = 1;
-    if (h == 0)
-        h = 1;
-    stride = w * glFmt2bpp(format, type);
-    if (!stride)
-        return;
-    init = malloc(stride * h);
-    memset(init, val, stride * h);
-    glAdjustAlignment(gl, stride);
-    gl->PixelStorei(GL_UNPACK_ROW_LENGTH, w);
-    gl->TexImage2D(target, 0, fmt, w, h, 0, format, type, init);
-    gl->TexParameterf(target, GL_TEXTURE_PRIORITY, 1.0);
-    gl->TexParameteri(target, GL_TEXTURE_MIN_FILTER, filter);
-    gl->TexParameteri(target, GL_TEXTURE_MAG_FILTER, filter);
-    gl->TexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-    gl->TexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-    // Border texels should not be used with CLAMP_TO_EDGE
-    // We set a sane default anyway.
-    gl->TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, border);
-    free(init);
-}
-
-static GLint detect_hqtexfmt(GL *gl)
-{
-    const char *extensions = (const char *)gl->GetString(GL_EXTENSIONS);
-    if (strstr(extensions, "_texture_float"))
-        return GL_RGB32F;
-    else if (strstr(extensions, "NV_float_buffer"))
-        return GL_FLOAT_RGB32_NV;
-    return GL_RGB16;
-}
-
-/**
- * \brief creates a texture from a PPM file
- * \param target texture taget, usually GL_TEXTURE_2D
- * \param fmt internal texture format, 0 for default
- * \param filter filter used for scaling, e.g. GL_LINEAR
- * \param f file to read PPM from
- * \param width [out] width of texture
- * \param height [out] height of texture
- * \param maxval [out] maxval value from PPM file
- * \return 0 on error, 1 otherwise
- * \ingroup gltexture
- */
-static int glCreatePPMTex(GL *gl, GLenum target, GLenum fmt, GLint filter,
-                          FILE *f, int *width, int *height, int *maxval)
-{
-    int w, h, m, bpp;
-    GLenum type;
-    uint8_t *data = read_pnm(f, &w, &h, &bpp, &m);
-    GLint hqtexfmt = detect_hqtexfmt(gl);
-    if (!data || (bpp != 3 && bpp != 6)) {
-        free(data);
-        return 0;
-    }
-    if (!fmt) {
-        fmt = bpp == 6 ? hqtexfmt : 3;
-        if (fmt == GL_FLOAT_RGB32_NV && target != GL_TEXTURE_RECTANGLE)
-            fmt = GL_RGB16;
-    }
-    type = bpp == 6 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
-    glCreateClearTex(gl, target, fmt, GL_RGB, type, filter, w, h, 0);
-    glUploadTex(gl, target, GL_RGB, type,
-                data, w * bpp, 0, 0, w, h, 0);
-    free(data);
-    if (width)
-        *width = w;
-    if (height)
-        *height = h;
-    if (maxval)
-        *maxval =