mirror of
https://github.com/mpv-player/mpv
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1006 lines
32 KiB
C
1006 lines
32 KiB
C
/*
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* common OpenGL routines
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*
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* copyleft (C) 2005-2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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* Special thanks go to the xine team and Matthias Hopf, whose video_out_opengl.c
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* gave me lots of good ideas.
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*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* You can alternatively redistribute this file and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*/
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/**
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* \file gl_common.c
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* \brief OpenGL helper functions used by vo_gl.c and vo_gl2.c
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*/
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdbool.h>
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#include <math.h>
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#include <assert.h>
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#include "talloc.h"
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#include "gl_common.h"
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#include "mpvcore/options.h"
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#include "mpvcore/m_option.h"
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#include "sub/sub.h"
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#include "bitmap_packer.h"
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//! \defgroup glgeneral OpenGL general helper functions
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// GLU has this as gluErrorString (we don't use GLU, as it is legacy-OpenGL)
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static const char *gl_error_to_string(GLenum error)
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{
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switch (error) {
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case GL_INVALID_ENUM: return "INVALID_ENUM";
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case GL_INVALID_VALUE: return "INVALID_VALUE";
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case GL_INVALID_OPERATION: return "INVALID_OPERATION";
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case GL_INVALID_FRAMEBUFFER_OPERATION:
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return "INVALID_FRAMEBUFFER_OPERATION";
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case GL_OUT_OF_MEMORY: return "OUT_OF_MEMORY";
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default: return "unknown";
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}
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}
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void glCheckError(GL *gl, struct mp_log *log, const char *info)
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{
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for (;;) {
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GLenum error = gl->GetError();
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if (error == GL_NO_ERROR)
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break;
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mp_msg_log(log, MSGL_ERR, "%s: OpenGL error %s.\n", info,
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gl_error_to_string(error));
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}
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}
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//! \defgroup glcontext OpenGL context management helper functions
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//! \defgroup gltexture OpenGL texture handling helper functions
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//! \defgroup glconversion OpenGL conversion helper functions
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/**
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* \brief adjusts the GL_UNPACK_ALIGNMENT to fit the stride.
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* \param stride number of bytes per line for which alignment should fit.
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* \ingroup glgeneral
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*/
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void glAdjustAlignment(GL *gl, int stride)
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{
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GLint gl_alignment;
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if (stride % 8 == 0)
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gl_alignment = 8;
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else if (stride % 4 == 0)
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gl_alignment = 4;
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else if (stride % 2 == 0)
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gl_alignment = 2;
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else
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gl_alignment = 1;
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gl->PixelStorei(GL_UNPACK_ALIGNMENT, gl_alignment);
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gl->PixelStorei(GL_PACK_ALIGNMENT, gl_alignment);
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}
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struct feature {
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int id;
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const char *name;
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};
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static const struct feature features[] = {
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{MPGL_CAP_GL, "Basic OpenGL"},
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{MPGL_CAP_GL_LEGACY, "Legacy OpenGL"},
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{MPGL_CAP_GL2, "OpenGL 2.0"},
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{MPGL_CAP_GL21, "OpenGL 2.1"},
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{MPGL_CAP_GL3, "OpenGL 3.0"},
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{MPGL_CAP_FB, "Framebuffers"},
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{MPGL_CAP_VAO, "VAOs"},
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{MPGL_CAP_SRGB_TEX, "sRGB textures"},
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{MPGL_CAP_SRGB_FB, "sRGB framebuffers"},
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{MPGL_CAP_FLOAT_TEX, "Float textures"},
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{MPGL_CAP_TEX_RG, "RG textures"},
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{MPGL_CAP_NO_SW, "NO_SW"},
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{0},
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};
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static void list_features(int set, struct mp_log *log, int msgl, bool invert)
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{
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for (const struct feature *f = &features[0]; f->id; f++) {
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if (invert == !(f->id & set))
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mp_msg_log(log, msgl, " [%s]", f->name);
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}
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mp_msg_log(log, msgl, "\n");
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}
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// This guesses if the current GL context is a suspected software renderer.
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static bool is_software_gl(GL *gl)
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{
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const char *renderer = gl->GetString(GL_RENDERER);
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const char *vendor = gl->GetString(GL_VENDOR);
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return !(renderer && vendor) ||
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strcmp(renderer, "Software Rasterizer") == 0 ||
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strstr(renderer, "llvmpipe") ||
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strcmp(vendor, "Microsoft Corporation") == 0 ||
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strcmp(renderer, "Mesa X11") == 0;
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}
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#ifdef HAVE_LIBDL
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#include <dlfcn.h>
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#endif
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void *mp_getdladdr(const char *s)
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{
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void *ret = NULL;
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#ifdef HAVE_LIBDL
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void *handle = dlopen(NULL, RTLD_LAZY);
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if (!handle)
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return NULL;
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ret = dlsym(handle, s);
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dlclose(handle);
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#endif
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return ret;
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}
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#define FN_OFFS(name) offsetof(GL, name)
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// Define the function with a "hard" reference to the function as fallback.
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// (This requires linking with a compatible OpenGL library.)
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#define DEF_FN_HARD(name) {FN_OFFS(name), {"gl" # name}, gl ## name}
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#define DEF_FN(name) {FN_OFFS(name), {"gl" # name}}
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#define DEF_FN_NAMES(name, ...) {FN_OFFS(name), {__VA_ARGS__}}
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struct gl_function {
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ptrdiff_t offset;
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char *funcnames[7];
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void *fallback;
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};
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struct gl_functions {
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const char *extension; // introduced with this extension in any version
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int provides; // bitfield of MPGL_CAP_* constants
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int ver_core; // introduced as required function
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int ver_removed; // removed as required function (no replacement)
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bool partial_ok; // loading only some functions is ok
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struct gl_function *functions;
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};
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#define MAX_FN_COUNT 50 // max functions per gl_functions section
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struct gl_functions gl_functions[] = {
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// GL functions which are always available anywhere at least since 1.1
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{
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.ver_core = MPGL_VER(1, 1),
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.provides = MPGL_CAP_GL,
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.functions = (struct gl_function[]) {
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DEF_FN_HARD(Viewport),
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DEF_FN_HARD(Clear),
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DEF_FN_HARD(GenTextures),
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DEF_FN_HARD(DeleteTextures),
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DEF_FN_HARD(TexEnvi),
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DEF_FN_HARD(ClearColor),
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DEF_FN_HARD(Enable),
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DEF_FN_HARD(Disable),
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DEF_FN_HARD(DrawBuffer),
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DEF_FN_HARD(DepthMask),
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DEF_FN_HARD(BlendFunc),
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DEF_FN_HARD(Flush),
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DEF_FN_HARD(Finish),
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DEF_FN_HARD(PixelStorei),
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DEF_FN_HARD(TexImage1D),
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DEF_FN_HARD(TexImage2D),
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DEF_FN_HARD(TexSubImage2D),
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DEF_FN_HARD(GetTexImage),
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DEF_FN_HARD(TexParameteri),
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DEF_FN_HARD(TexParameterf),
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DEF_FN_HARD(TexParameterfv),
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DEF_FN_HARD(GetIntegerv),
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DEF_FN_HARD(GetBooleanv),
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DEF_FN_HARD(ColorMask),
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DEF_FN_HARD(ReadPixels),
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DEF_FN_HARD(ReadBuffer),
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DEF_FN_HARD(DrawArrays),
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DEF_FN_HARD(GetString),
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DEF_FN_HARD(GetError),
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DEF_FN_HARD(GetTexLevelParameteriv),
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{0}
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},
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},
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// GL 2.0-3.x functions
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{
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.ver_core = MPGL_VER(2, 0),
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.provides = MPGL_CAP_GL2,
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.functions = (struct gl_function[]) {
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DEF_FN(GenBuffers),
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DEF_FN(DeleteBuffers),
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DEF_FN(BindBuffer),
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DEF_FN(MapBuffer),
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DEF_FN(UnmapBuffer),
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DEF_FN(BufferData),
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DEF_FN(ActiveTexture),
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DEF_FN(BindTexture),
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DEF_FN(GetAttribLocation),
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DEF_FN(EnableVertexAttribArray),
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DEF_FN(DisableVertexAttribArray),
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DEF_FN(VertexAttribPointer),
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DEF_FN(UseProgram),
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DEF_FN(GetUniformLocation),
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DEF_FN(CompileShader),
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DEF_FN(CreateProgram),
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DEF_FN(CreateShader),
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DEF_FN(ShaderSource),
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DEF_FN(LinkProgram),
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DEF_FN(AttachShader),
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DEF_FN(DeleteShader),
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DEF_FN(DeleteProgram),
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DEF_FN(GetShaderInfoLog),
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DEF_FN(GetShaderiv),
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DEF_FN(GetProgramInfoLog),
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DEF_FN(GetProgramiv),
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DEF_FN(BindAttribLocation),
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DEF_FN(Uniform1f),
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DEF_FN(Uniform2f),
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DEF_FN(Uniform3f),
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DEF_FN(Uniform1i),
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DEF_FN(UniformMatrix2fv),
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DEF_FN(UniformMatrix3fv),
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DEF_FN(TexImage3D),
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{0},
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},
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},
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// GL 2.1-3.x functions (also: GLSL 120 shaders)
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{
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.ver_core = MPGL_VER(2, 1),
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.provides = MPGL_CAP_GL21,
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.functions = (struct gl_function[]) {
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DEF_FN(UniformMatrix4x3fv),
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{0}
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},
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},
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// GL 3.x core only functions.
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{
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.ver_core = MPGL_VER(3, 0),
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.provides = MPGL_CAP_GL3 | MPGL_CAP_SRGB_TEX | MPGL_CAP_SRGB_FB,
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.functions = (struct gl_function[]) {
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DEF_FN(GetStringi),
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{0}
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},
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},
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// Framebuffers, extension in GL 2.x, core in GL 3.x core.
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{
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.ver_core = MPGL_VER(3, 0),
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.extension = "GL_ARB_framebuffer_object",
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.provides = MPGL_CAP_FB,
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.functions = (struct gl_function[]) {
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DEF_FN(BindFramebuffer),
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DEF_FN(GenFramebuffers),
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DEF_FN(DeleteFramebuffers),
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DEF_FN(CheckFramebufferStatus),
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DEF_FN(FramebufferTexture2D),
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{0}
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},
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},
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// Framebuffers, alternative extension name.
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{
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.ver_removed = MPGL_VER(3, 0), // don't touch these fn names in 3.x
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.extension = "GL_EXT_framebuffer_object",
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.provides = MPGL_CAP_FB,
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.functions = (struct gl_function[]) {
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DEF_FN_NAMES(BindFramebuffer, "glBindFramebufferEXT"),
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DEF_FN_NAMES(GenFramebuffers, "glGenFramebuffersEXT"),
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DEF_FN_NAMES(DeleteFramebuffers, "glDeleteFramebuffersEXT"),
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DEF_FN_NAMES(CheckFramebufferStatus, "glCheckFramebufferStatusEXT"),
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DEF_FN_NAMES(FramebufferTexture2D, "glFramebufferTexture2DEXT"),
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{0}
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},
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},
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// VAOs, extension in GL 2.x, core in GL 3.x core.
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{
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.ver_core = MPGL_VER(3, 0),
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.extension = "GL_ARB_vertex_array_object",
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.provides = MPGL_CAP_VAO,
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.functions = (struct gl_function[]) {
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DEF_FN(GenVertexArrays),
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DEF_FN(BindVertexArray),
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DEF_FN(DeleteVertexArrays),
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{0}
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}
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},
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// sRGB textures, extension in GL 2.x, core in GL 3.x core.
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{
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.ver_core = MPGL_VER(3, 0),
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.extension = "GL_EXT_texture_sRGB",
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.provides = MPGL_CAP_SRGB_TEX,
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.functions = (struct gl_function[]) {{0}},
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},
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// sRGB framebuffers, extension in GL 2.x, core in GL 3.x core.
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{
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.ver_core = MPGL_VER(3, 0),
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.extension = "GL_EXT_framebuffer_sRGB",
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.provides = MPGL_CAP_SRGB_FB,
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.functions = (struct gl_function[]) {{0}},
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},
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// Float textures, extension in GL 2.x, core in GL 3.x core.
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{
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.ver_core = MPGL_VER(3, 0),
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.extension = "GL_ARB_texture_float",
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.provides = MPGL_CAP_FLOAT_TEX,
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.functions = (struct gl_function[]) {{0}},
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},
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// GL_RED / GL_RG textures, extension in GL 2.x, core in GL 3.x core.
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{
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.ver_core = MPGL_VER(3, 0),
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.extension = "GL_ARB_texture_rg",
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.provides = MPGL_CAP_TEX_RG,
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.functions = (struct gl_function[]) {{0}},
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},
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// Swap control, always an OS specific extension
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{
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.extension = "_swap_control",
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.functions = (struct gl_function[]) {
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DEF_FN_NAMES(SwapInterval, "glXSwapIntervalSGI", "glXSwapInterval",
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"wglSwapIntervalSGI", "wglSwapInterval",
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"wglSwapIntervalEXT"),
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{0}
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},
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},
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// GL legacy functions in GL 1.x - 2.x, removed from GL 3.x
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{
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.ver_core = MPGL_VER(1, 1),
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.ver_removed = MPGL_VER(3, 0),
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.provides = MPGL_CAP_GL_LEGACY,
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.functions = (struct gl_function[]) {
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DEF_FN_HARD(Begin),
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DEF_FN_HARD(End),
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DEF_FN_HARD(MatrixMode),
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DEF_FN_HARD(LoadIdentity),
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DEF_FN_HARD(Translated),
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DEF_FN_HARD(Scaled),
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DEF_FN_HARD(Ortho),
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DEF_FN_HARD(PushMatrix),
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DEF_FN_HARD(PopMatrix),
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DEF_FN_HARD(GenLists),
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DEF_FN_HARD(DeleteLists),
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DEF_FN_HARD(NewList),
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DEF_FN_HARD(EndList),
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DEF_FN_HARD(CallList),
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DEF_FN_HARD(CallLists),
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DEF_FN_HARD(Color4ub),
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DEF_FN_HARD(Color4f),
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DEF_FN_HARD(TexCoord2f),
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DEF_FN_HARD(TexCoord2fv),
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DEF_FN_HARD(Vertex2f),
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DEF_FN_HARD(VertexPointer),
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DEF_FN_HARD(ColorPointer),
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DEF_FN_HARD(TexCoordPointer),
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DEF_FN_HARD(EnableClientState),
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DEF_FN_HARD(DisableClientState),
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{0}
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},
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},
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// Loading of old extensions, which are later added to GL 2.0.
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// NOTE: actually we should be checking the extension strings: the OpenGL
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// library could provide an entry point, but not implement it.
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// But the previous code didn't do that, and nobody ever complained.
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{
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.ver_removed = MPGL_VER(2, 1),
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.partial_ok = true,
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.functions = (struct gl_function[]) {
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DEF_FN_NAMES(GenBuffers, "glGenBuffers", "glGenBuffersARB"),
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DEF_FN_NAMES(DeleteBuffers, "glDeleteBuffers", "glDeleteBuffersARB"),
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DEF_FN_NAMES(BindBuffer, "glBindBuffer", "glBindBufferARB"),
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DEF_FN_NAMES(MapBuffer, "glMapBuffer", "glMapBufferARB"),
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DEF_FN_NAMES(UnmapBuffer, "glUnmapBuffer", "glUnmapBufferARB"),
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DEF_FN_NAMES(BufferData, "glBufferData", "glBufferDataARB"),
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DEF_FN_NAMES(ActiveTexture, "glActiveTexture", "glActiveTextureARB"),
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DEF_FN_NAMES(BindTexture, "glBindTexture", "glBindTextureARB", "glBindTextureEXT"),
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DEF_FN_NAMES(MultiTexCoord2f, "glMultiTexCoord2f", "glMultiTexCoord2fARB"),
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DEF_FN_NAMES(TexImage3D, "glTexImage3D"),
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{0}
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},
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},
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// Ancient ARB shaders.
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{
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.extension = "_program",
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.ver_removed = MPGL_VER(3, 0),
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.functions = (struct gl_function[]) {
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DEF_FN_NAMES(GenPrograms, "glGenProgramsARB"),
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DEF_FN_NAMES(DeletePrograms, "glDeleteProgramsARB"),
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DEF_FN_NAMES(BindProgram, "glBindProgramARB"),
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DEF_FN_NAMES(ProgramString, "glProgramStringARB"),
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DEF_FN_NAMES(GetProgramivARB, "glGetProgramivARB"),
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DEF_FN_NAMES(ProgramEnvParameter4f, "glProgramEnvParameter4fARB"),
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{0}
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},
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},
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// Ancient ATI extensions.
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{
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.extension = "ATI_fragment_shader",
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.ver_removed = MPGL_VER(3, 0),
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.functions = (struct gl_function[]) {
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DEF_FN_NAMES(BeginFragmentShader, "glBeginFragmentShaderATI"),
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DEF_FN_NAMES(EndFragmentShader, "glEndFragmentShaderATI"),
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DEF_FN_NAMES(SampleMap, "glSampleMapATI"),
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DEF_FN_NAMES(ColorFragmentOp2, "glColorFragmentOp2ATI"),
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DEF_FN_NAMES(ColorFragmentOp3, "glColorFragmentOp3ATI"),
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DEF_FN_NAMES(SetFragmentShaderConstant, "glSetFragmentShaderConstantATI"),
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{0}
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},
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},
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};
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#undef FN_OFFS
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#undef DEF_FN_HARD
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#undef DEF_FN
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#undef DEF_FN_NAMES
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// Fill the GL struct with function pointers and extensions from the current
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// GL context. Called by the backend.
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// getProcAddress: function to resolve function names, may be NULL
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// ext2: an extra extension string
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// log: used to output messages
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// Note: if you create a CONTEXT_FORWARD_COMPATIBLE_BIT_ARB with OpenGL 3.0,
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// you must append "GL_ARB_compatibility" to ext2.
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void mpgl_load_functions(GL *gl, void *(*getProcAddress)(const GLubyte *),
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const char *ext2, struct mp_log *log)
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{
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talloc_free_children(gl);
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*gl = (GL) {
|
|
.extensions = talloc_strdup(gl, ext2 ? ext2 : ""),
|
|
};
|
|
|
|
if (!getProcAddress)
|
|
getProcAddress = (void *)mp_getdladdr;
|
|
|
|
gl->GetString = getProcAddress("glGetString");
|
|
if (!gl->GetString)
|
|
gl->GetString = glGetString;
|
|
|
|
GLint major = 0, minor = 0;
|
|
const char *version = gl->GetString(GL_VERSION);
|
|
sscanf(version, "%d.%d", &major, &minor);
|
|
gl->version = MPGL_VER(major, minor);
|
|
mp_msg_log(log, MSGL_V, "Detected OpenGL %d.%d.\n", major, minor);
|
|
|
|
mp_msg_log(log, MSGL_V, "GL_VENDOR='%s'\n", gl->GetString(GL_VENDOR));
|
|
mp_msg_log(log, MSGL_V, "GL_RENDERER='%s'\n", gl->GetString(GL_RENDERER));
|
|
mp_msg_log(log, MSGL_V, "GL_VERSION='%s'\n", gl->GetString(GL_VERSION));
|
|
mp_msg_log(log, MSGL_V, "GL_SHADING_LANGUAGE_VERSION='%s'\n",
|
|
gl->GetString(GL_SHADING_LANGUAGE_VERSION));
|
|
|
|
// Note: This code doesn't handle CONTEXT_FORWARD_COMPATIBLE_BIT_ARB
|
|
// on OpenGL 3.0 correctly. Apparently there's no way to detect this
|
|
// situation, because GL_ARB_compatibility is specified only for 3.1
|
|
// and above.
|
|
|
|
bool has_legacy = false;
|
|
if (gl->version >= MPGL_VER(3, 0)) {
|
|
gl->GetStringi = getProcAddress("glGetStringi");
|
|
gl->GetIntegerv = getProcAddress("glGetIntegerv");
|
|
|
|
if (!(gl->GetStringi && gl->GetIntegerv))
|
|
return;
|
|
|
|
GLint exts;
|
|
gl->GetIntegerv(GL_NUM_EXTENSIONS, &exts);
|
|
for (int n = 0; n < exts; n++) {
|
|
const char *ext = gl->GetStringi(GL_EXTENSIONS, n);
|
|
gl->extensions = talloc_asprintf_append(gl->extensions, " %s", ext);
|
|
if (strcmp(ext, "GL_ARB_compatibility") == 0)
|
|
has_legacy = true;
|
|
}
|
|
|
|
// This version doesn't have GL_ARB_compatibility yet, and always
|
|
// includes legacy (except with CONTEXT_FORWARD_COMPATIBLE_BIT_ARB).
|
|
if (gl->version == MPGL_VER(3, 0))
|
|
has_legacy = true;
|
|
} else {
|
|
const char *ext = (char*)gl->GetString(GL_EXTENSIONS);
|
|
gl->extensions = talloc_asprintf_append(gl->extensions, " %s", ext);
|
|
|
|
has_legacy = true;
|
|
}
|
|
|
|
if (has_legacy)
|
|
mp_msg_log(log, MSGL_V, "OpenGL legacy compat. found.\n");
|
|
mp_msg_log(log, MSGL_DBG2, "Combined OpenGL extensions string:\n%s\n",
|
|
gl->extensions);
|
|
|
|
for (int n = 0; n < sizeof(gl_functions) / sizeof(gl_functions[0]); n++) {
|
|
struct gl_functions *section = &gl_functions[n];
|
|
|
|
// With has_legacy, the legacy functions are still available, and
|
|
// functions are never actually removed. (E.g. the context could be at
|
|
// version >= 3.0, but functions like glBegin still exist and work.)
|
|
if (!has_legacy && section->ver_removed &&
|
|
gl->version >= section->ver_removed)
|
|
continue;
|
|
|
|
// NOTE: Function entrypoints can exist, even if they do not work.
|
|
// We must always check extension strings and versions.
|
|
|
|
bool exists = false;
|
|
if (section->ver_core)
|
|
exists = gl->version >= section->ver_core;
|
|
|
|
if (section->extension && strstr(gl->extensions, section->extension))
|
|
exists = true;
|
|
|
|
if (section->partial_ok)
|
|
exists = true; // possibly
|
|
|
|
if (!exists)
|
|
continue;
|
|
|
|
void *loaded[MAX_FN_COUNT] = {0};
|
|
bool all_loaded = true;
|
|
|
|
for (int i = 0; section->functions[i].funcnames[0]; i++) {
|
|
struct gl_function *fn = §ion->functions[i];
|
|
void *ptr = NULL;
|
|
for (int x = 0; fn->funcnames[x]; x++) {
|
|
ptr = getProcAddress((const GLubyte *)fn->funcnames[x]);
|
|
if (ptr)
|
|
break;
|
|
}
|
|
if (!ptr)
|
|
ptr = fn->fallback;
|
|
if (!ptr) {
|
|
all_loaded = false;
|
|
if (!section->partial_ok) {
|
|
mp_msg_log(log, MSGL_V, "Required function '%s' not "
|
|
"found for %s/%d.%d.\n", fn->funcnames[0],
|
|
section->extension ? section->extension : "native",
|
|
MPGL_VER_GET_MAJOR(section->ver_core),
|
|
MPGL_VER_GET_MINOR(section->ver_core));
|
|
break;
|
|
}
|
|
}
|
|
assert(i < MAX_FN_COUNT);
|
|
loaded[i] = ptr;
|
|
}
|
|
|
|
if (all_loaded || section->partial_ok) {
|
|
gl->mpgl_caps |= section->provides;
|
|
for (int i = 0; section->functions[i].funcnames[0]; i++) {
|
|
struct gl_function *fn = §ion->functions[i];
|
|
void **funcptr = (void**)(((char*)gl) + fn->offset);
|
|
if (loaded[i])
|
|
*funcptr = loaded[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
gl->glsl_version = 0;
|
|
if (gl->version >= MPGL_VER(2, 0))
|
|
gl->glsl_version = 110;
|
|
if (gl->version >= MPGL_VER(2, 1))
|
|
gl->glsl_version = 120;
|
|
if (gl->version >= MPGL_VER(3, 0))
|
|
gl->glsl_version = 130;
|
|
// Specifically needed for OSX (normally we request 3.0 contexts only, but
|
|
// OSX always creates 3.2 contexts when requesting a core context).
|
|
if (gl->version >= MPGL_VER(3, 2))
|
|
gl->glsl_version = 150;
|
|
|
|
if (!is_software_gl(gl))
|
|
gl->mpgl_caps |= MPGL_CAP_NO_SW;
|
|
|
|
mp_msg_log(log, MSGL_V, "Detected OpenGL features:");
|
|
list_features(gl->mpgl_caps, log, MSGL_V, false);
|
|
}
|
|
|
|
/**
|
|
* \brief return the number of bytes per pixel for the given format
|
|
* \param format OpenGL format
|
|
* \param type OpenGL type
|
|
* \return bytes per pixel
|
|
* \ingroup glgeneral
|
|
*
|
|
* Does not handle all possible variants, just those used by MPlayer
|
|
*/
|
|
int glFmt2bpp(GLenum format, GLenum type)
|
|
{
|
|
int component_size = 0;
|
|
switch (type) {
|
|
case GL_UNSIGNED_BYTE_3_3_2:
|
|
case GL_UNSIGNED_BYTE_2_3_3_REV:
|
|
return 1;
|
|
case GL_UNSIGNED_SHORT_5_5_5_1:
|
|
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
|
|
case GL_UNSIGNED_SHORT_5_6_5:
|
|
case GL_UNSIGNED_SHORT_5_6_5_REV:
|
|
return 2;
|
|
case GL_UNSIGNED_BYTE:
|
|
component_size = 1;
|
|
break;
|
|
case GL_UNSIGNED_SHORT:
|
|
component_size = 2;
|
|
break;
|
|
}
|
|
switch (format) {
|
|
case GL_LUMINANCE:
|
|
case GL_ALPHA:
|
|
return component_size;
|
|
case GL_YCBCR_MESA:
|
|
return 2;
|
|
case GL_RGB:
|
|
case GL_BGR:
|
|
return 3 * component_size;
|
|
case GL_RGBA:
|
|
case GL_BGRA:
|
|
return 4 * component_size;
|
|
case GL_RED:
|
|
return component_size;
|
|
case GL_RG:
|
|
case GL_LUMINANCE_ALPHA:
|
|
return 2 * component_size;
|
|
}
|
|
abort(); // unknown
|
|
}
|
|
|
|
/**
|
|
* \brief upload a texture, handling things like stride and slices
|
|
* \param target texture target, usually GL_TEXTURE_2D
|
|
* \param format OpenGL format of data
|
|
* \param type OpenGL type of data
|
|
* \param dataptr data to upload
|
|
* \param stride data stride
|
|
* \param x x offset in texture
|
|
* \param y y offset in texture
|
|
* \param w width of the texture part to upload
|
|
* \param h height of the texture part to upload
|
|
* \param slice height of an upload slice, 0 for all at once
|
|
* \ingroup gltexture
|
|
*/
|
|
void glUploadTex(GL *gl, GLenum target, GLenum format, GLenum type,
|
|
const void *dataptr, int stride,
|
|
int x, int y, int w, int h, int slice)
|
|
{
|
|
const uint8_t *data = dataptr;
|
|
int y_max = y + h;
|
|
if (w <= 0 || h <= 0)
|
|
return;
|
|
if (slice <= 0)
|
|
slice = h;
|
|
if (stride < 0) {
|
|
data += (h - 1) * stride;
|
|
stride = -stride;
|
|
}
|
|
// this is not always correct, but should work for MPlayer
|
|
glAdjustAlignment(gl, stride);
|
|
gl->PixelStorei(GL_UNPACK_ROW_LENGTH, stride / glFmt2bpp(format, type));
|
|
for (; y + slice <= y_max; y += slice) {
|
|
gl->TexSubImage2D(target, 0, x, y, w, slice, format, type, data);
|
|
data += stride * slice;
|
|
}
|
|
if (y < y_max)
|
|
gl->TexSubImage2D(target, 0, x, y, w, y_max - y, format, type, data);
|
|
}
|
|
|
|
// Like glUploadTex, but upload a byte array with all elements set to val.
|
|
// If scratch is not NULL, points to a resizeable talloc memory block than can
|
|
// be freely used by the function (for avoiding temporary memory allocations).
|
|
void glClearTex(GL *gl, GLenum target, GLenum format, GLenum type,
|
|
int x, int y, int w, int h, uint8_t val, void **scratch)
|
|
{
|
|
int bpp = glFmt2bpp(format, type);
|
|
int stride = w * bpp;
|
|
int size = h * stride;
|
|
if (size < 1)
|
|
return;
|
|
void *data = scratch ? *scratch : NULL;
|
|
if (talloc_get_size(data) < size)
|
|
data = talloc_realloc(NULL, data, char *, size);
|
|
memset(data, val, size);
|
|
glAdjustAlignment(gl, stride);
|
|
gl->PixelStorei(GL_UNPACK_ROW_LENGTH, w);
|
|
gl->TexSubImage2D(target, 0, x, y, w, h, format, type, data);
|
|
if (scratch) {
|
|
*scratch = data;
|
|
} else {
|
|
talloc_free(data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* \brief download a texture, handling things like stride and slices
|
|
* \param target texture target, usually GL_TEXTURE_2D
|
|
* \param format OpenGL format of data
|
|
* \param type OpenGL type of data
|
|
* \param dataptr destination memory for download
|
|
* \param stride data stride (must be positive)
|
|
* \ingroup gltexture
|
|
*/
|
|
void glDownloadTex(GL *gl, GLenum target, GLenum format, GLenum type,
|
|
void *dataptr, int stride)
|
|
{
|
|
// this is not always correct, but should work for MPlayer
|
|
glAdjustAlignment(gl, stride);
|
|
gl->PixelStorei(GL_PACK_ROW_LENGTH, stride / glFmt2bpp(format, type));
|
|
gl->GetTexImage(target, 0, format, type, dataptr);
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
mp_image_t *glGetWindowScreenshot(GL *gl)
|
|
{
|
|
GLint vp[4]; //x, y, w, h
|
|
gl->GetIntegerv(GL_VIEWPORT, vp);
|
|
mp_image_t *image = mp_image_alloc(IMGFMT_RGB24, vp[2], vp[3]);
|
|
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
|
|
gl->PixelStorei(GL_PACK_ALIGNMENT, 1);
|
|
gl->PixelStorei(GL_PACK_ROW_LENGTH, 0);
|
|
gl->ReadBuffer(GL_FRONT);
|
|
//flip image while reading (and also avoid stride-related trouble)
|
|
for (int y = 0; y < vp[3]; y++) {
|
|
gl->ReadPixels(vp[0], vp[1] + vp[3] - y - 1, vp[2], 1,
|
|
GL_RGB, GL_UNSIGNED_BYTE,
|
|
image->planes[0] + y * image->stride[0]);
|
|
}
|
|
return image;
|
|
}
|
|
|
|
typedef void (*MPGLSetBackendFn)(MPGLContext *ctx);
|
|
|
|
struct backend {
|
|
const char *name;
|
|
MPGLSetBackendFn init;
|
|
};
|
|
|
|
static struct backend backends[] = {
|
|
#ifdef CONFIG_GL_COCOA
|
|
{"cocoa", mpgl_set_backend_cocoa},
|
|
#endif
|
|
#ifdef CONFIG_GL_WIN32
|
|
{"win", mpgl_set_backend_w32},
|
|
#endif
|
|
|
|
//Add the wayland backend before x11, in order to probe for a wayland-server before a x11-server and avoid using xwayland
|
|
#ifdef CONFIG_GL_WAYLAND
|
|
{"wayland", mpgl_set_backend_wayland},
|
|
#endif
|
|
#ifdef CONFIG_GL_X11
|
|
{"x11", mpgl_set_backend_x11},
|
|
#endif
|
|
{0}
|
|
};
|
|
|
|
int mpgl_find_backend(const char *name)
|
|
{
|
|
if (name == NULL || strcmp(name, "auto") == 0)
|
|
return -1;
|
|
for (const struct backend *entry = backends; entry->name; entry++) {
|
|
if (strcmp(entry->name, name) == 0)
|
|
return entry - backends;
|
|
}
|
|
return -2;
|
|
}
|
|
|
|
int mpgl_validate_backend_opt(const struct m_option *opt, struct bstr name,
|
|
struct bstr param)
|
|
{
|
|
if (bstr_equals0(param, "help")) {
|
|
mp_msg(MSGT_VO, MSGL_INFO, "OpenGL windowing backends:\n");
|
|
mp_msg(MSGT_VO, MSGL_INFO, " auto (autodetect)\n");
|
|
for (const struct backend *entry = backends; entry->name; entry++)
|
|
mp_msg(MSGT_VO, MSGL_INFO, " %s\n", entry->name);
|
|
return M_OPT_EXIT - 1;
|
|
}
|
|
char s[20];
|
|
snprintf(s, sizeof(s), "%.*s", BSTR_P(param));
|
|
return mpgl_find_backend(s) >= -1 ? 1 : M_OPT_INVALID;
|
|
}
|
|
|
|
static MPGLContext *init_backend(struct vo *vo, MPGLSetBackendFn set_backend,
|
|
bool probing)
|
|
{
|
|
MPGLContext *ctx = talloc_ptrtype(NULL, ctx);
|
|
*ctx = (MPGLContext) {
|
|
.gl = talloc_zero(ctx, GL),
|
|
.vo = vo,
|
|
};
|
|
vo->probing = probing;
|
|
set_backend(ctx);
|
|
if (!ctx->vo_init(vo)) {
|
|
talloc_free(ctx);
|
|
ctx = NULL;
|
|
}
|
|
vo->probing = false;
|
|
return ctx;
|
|
}
|
|
|
|
MPGLContext *mpgl_init(struct vo *vo, const char *backend_name)
|
|
{
|
|
MPGLContext *ctx = NULL;
|
|
int index = mpgl_find_backend(backend_name);
|
|
if (index == -1) {
|
|
for (const struct backend *entry = backends; entry->name; entry++) {
|
|
ctx = init_backend(vo, entry->init, true);
|
|
if (ctx)
|
|
break;
|
|
}
|
|
} else if (index >= 0) {
|
|
ctx = init_backend(vo, backends[index].init, false);
|
|
}
|
|
return ctx;
|
|
}
|
|
|
|
bool mpgl_config_window(struct MPGLContext *ctx, int gl_caps, uint32_t d_width,
|
|
uint32_t d_height, uint32_t flags)
|
|
{
|
|
gl_caps |= MPGL_CAP_GL;
|
|
|
|
ctx->requested_gl_version = (gl_caps & MPGL_CAP_GL_LEGACY)
|
|
? MPGL_VER(2, 1) : MPGL_VER(3, 0);
|
|
|
|
if (ctx->config_window(ctx, d_width, d_height, flags)) {
|
|
int missing = (ctx->gl->mpgl_caps & gl_caps) ^ gl_caps;
|
|
if (!missing)
|
|
return true;
|
|
|
|
MP_WARN(ctx->vo, "Missing OpenGL features:");
|
|
list_features(missing, ctx->vo->log, MSGL_WARN, false);
|
|
if (missing & MPGL_CAP_NO_SW)
|
|
MP_WARN(ctx->vo, "Rejecting suspected software OpenGL renderer.\n");
|
|
}
|
|
|
|
MP_ERR(ctx->vo, "OpenGL context creation failed!\n");
|
|
return false;
|
|
}
|
|
|
|
void mpgl_uninit(MPGLContext *ctx)
|
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{
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if (ctx) {
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ctx->releaseGlContext(ctx);
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ctx->vo_uninit(ctx->vo);
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}
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talloc_free(ctx);
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}
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void mpgl_set_context(MPGLContext *ctx)
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{
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if (ctx->set_current)
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ctx->set_current(ctx, true);
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}
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void mpgl_unset_context(MPGLContext *ctx)
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{
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if (ctx->set_current)
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ctx->set_current(ctx, false);
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}
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void mpgl_lock(MPGLContext *ctx)
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{
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mpgl_set_context(ctx);
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}
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void mpgl_unlock(MPGLContext *ctx)
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{
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mpgl_unset_context(ctx);
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}
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bool mpgl_is_thread_safe(MPGLContext *ctx)
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{
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return !!ctx->set_current;
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}
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void mp_log_source(struct mp_log *log, int lev, const char *src)
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{
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int line = 1;
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if (!src)
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return;
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while (*src) {
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const char *end = strchr(src, '\n');
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const char *next = end + 1;
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if (!end)
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next = end = src + strlen(src);
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mp_msg_log(log, lev, "[%3d] %.*s\n", line, (int)(end - src), src);
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line++;
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src = next;
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}
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}
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