mirror of https://github.com/mpv-player/mpv
679 lines
21 KiB
C
679 lines
21 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 mpv.
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*
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* mpv 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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* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
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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 <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 "common.h"
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#include "common/common.h"
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#include "options/options.h"
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#include "options/m_option.h"
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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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static void GLAPIENTRY dummy_glBindFramebuffer(GLenum target, GLuint framebuffer)
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{
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assert(framebuffer == 0);
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}
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static bool check_ext(GL *gl, const char *name)
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{
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const char *exts = gl->extensions;
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char *s = strstr(exts, name);
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char *e = s ? s + strlen(name) : NULL;
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return s && (s == exts || s[-1] == ' ') && (e[0] == ' ' || !e[0]);
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}
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#define FN_OFFS(name) offsetof(GL, name)
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#define DEF_FN(name) {FN_OFFS(name), "gl" # name}
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#define DEF_FN_NAME(name, str) {FN_OFFS(name), str}
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struct gl_function {
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ptrdiff_t offset;
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char *name;
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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_es_core; // introduced as required GL ES function
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const struct gl_function *functions;
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};
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#define MAX_FN_COUNT 100 // max functions per gl_functions section
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// Note: to keep the number of sections low, some functions are in multiple
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// sections (if there are tricky combinations of GL/ES versions)
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static const struct gl_functions gl_functions[] = {
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// GL 2.1+ desktop and GLES 2.0+ (anything we support)
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// Probably all of these are in GL 2.0 too, but we require GLSL 120.
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{
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.ver_core = 210,
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.ver_es_core = 200,
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.functions = (const struct gl_function[]) {
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DEF_FN(ActiveTexture),
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DEF_FN(AttachShader),
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DEF_FN(BindAttribLocation),
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DEF_FN(BindBuffer),
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DEF_FN(BindTexture),
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DEF_FN(BlendFuncSeparate),
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DEF_FN(BufferData),
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DEF_FN(Clear),
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DEF_FN(ClearColor),
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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(DeleteBuffers),
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DEF_FN(DeleteProgram),
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DEF_FN(DeleteShader),
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DEF_FN(DeleteTextures),
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DEF_FN(Disable),
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DEF_FN(DisableVertexAttribArray),
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DEF_FN(DrawArrays),
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DEF_FN(Enable),
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DEF_FN(EnableVertexAttribArray),
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DEF_FN(Finish),
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DEF_FN(Flush),
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DEF_FN(GenBuffers),
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DEF_FN(GenTextures),
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DEF_FN(GetAttribLocation),
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DEF_FN(GetError),
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DEF_FN(GetIntegerv),
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DEF_FN(GetProgramInfoLog),
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DEF_FN(GetProgramiv),
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DEF_FN(GetShaderInfoLog),
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DEF_FN(GetShaderiv),
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DEF_FN(GetString),
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DEF_FN(GetUniformLocation),
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DEF_FN(LinkProgram),
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DEF_FN(PixelStorei),
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DEF_FN(ReadPixels),
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DEF_FN(ShaderSource),
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DEF_FN(TexImage2D),
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DEF_FN(TexParameteri),
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DEF_FN(TexSubImage2D),
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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(UseProgram),
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DEF_FN(VertexAttribPointer),
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DEF_FN(Viewport),
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{0}
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},
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},
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// GL 2.1+ desktop only (and GLSL 120 shaders)
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{
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.ver_core = 210,
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.provides = MPGL_CAP_ROW_LENGTH | MPGL_CAP_1D_TEX | MPGL_CAP_3D_TEX,
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.functions = (const struct gl_function[]) {
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DEF_FN(DrawBuffer),
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DEF_FN(GetTexLevelParameteriv),
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DEF_FN(MapBuffer),
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DEF_FN(ReadBuffer),
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DEF_FN(TexImage1D),
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DEF_FN(TexImage3D),
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DEF_FN(UnmapBuffer),
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{0}
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},
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},
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// GL 3.0+ and ES 3.x core only functions.
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{
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.ver_core = 300,
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.ver_es_core = 300,
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.functions = (const struct gl_function[]) {
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DEF_FN(BindBufferBase),
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DEF_FN(BlitFramebuffer),
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DEF_FN(GetStringi),
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// for ES 3.0
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DEF_FN(GetTexLevelParameteriv),
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DEF_FN(ReadBuffer),
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DEF_FN(UnmapBuffer),
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{0}
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},
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},
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// Useful for ES 2.0
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{
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.ver_core = 110,
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.ver_es_core = 300,
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.extension = "GL_EXT_unpack_subimage",
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.provides = MPGL_CAP_ROW_LENGTH,
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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 = 300,
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.ver_es_core = 200,
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.extension = "GL_ARB_framebuffer_object",
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.provides = MPGL_CAP_FB,
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.functions = (const 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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// VAOs, extension in GL 2.x, core in GL 3.x core.
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{
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.ver_core = 300,
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.ver_es_core = 300,
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.extension = "GL_ARB_vertex_array_object",
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.provides = MPGL_CAP_VAO,
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.functions = (const 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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// Float textures, extension in GL 2.x, core in GL 3.x core.
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{
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.ver_core = 300,
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.ver_es_core = 300,
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.extension = "GL_ARB_texture_float",
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.provides = MPGL_CAP_FLOAT_TEX,
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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 = 300,
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.ver_es_core = 300,
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.extension = "GL_ARB_texture_rg",
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.provides = MPGL_CAP_TEX_RG,
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},
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{
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.ver_core = 320,
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.extension = "GL_ARB_sync",
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.functions = (const struct gl_function[]) {
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DEF_FN(FenceSync),
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DEF_FN(ClientWaitSync),
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DEF_FN(DeleteSync),
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{0}
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},
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},
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// Swap control, always an OS specific extension
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// The OSX code loads this manually.
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{
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.extension = "GLX_SGI_swap_control",
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.functions = (const struct gl_function[]) {
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DEF_FN_NAME(SwapInterval, "glXSwapIntervalSGI"),
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{0},
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},
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},
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{
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.extension = "WGL_EXT_swap_control",
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.functions = (const struct gl_function[]) {
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DEF_FN_NAME(SwapInterval, "wglSwapIntervalEXT"),
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{0},
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},
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},
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{
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.extension = "GLX_SGI_video_sync",
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.functions = (const struct gl_function[]) {
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DEF_FN_NAME(GetVideoSync, "glXGetVideoSyncSGI"),
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DEF_FN_NAME(WaitVideoSync, "glXWaitVideoSyncSGI"),
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{0},
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},
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},
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// For gl_hwdec_vdpau.c
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// http://www.opengl.org/registry/specs/NV/vdpau_interop.txt
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{
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.extension = "GL_NV_vdpau_interop",
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.provides = MPGL_CAP_VDPAU,
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.functions = (const struct gl_function[]) {
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// (only functions needed by us)
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DEF_FN(VDPAUInitNV),
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DEF_FN(VDPAUFiniNV),
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DEF_FN(VDPAURegisterOutputSurfaceNV),
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DEF_FN(VDPAUUnregisterSurfaceNV),
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DEF_FN(VDPAUSurfaceAccessNV),
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DEF_FN(VDPAUMapSurfacesNV),
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DEF_FN(VDPAUUnmapSurfacesNV),
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{0}
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},
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},
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// Apple Packed YUV Formats
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// For gl_hwdec_vda.c
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// http://www.opengl.org/registry/specs/APPLE/rgb_422.txt
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{
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.extension = "GL_APPLE_rgb_422",
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.provides = MPGL_CAP_APPLE_RGB_422,
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},
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{
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.ver_core = 430,
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.extension = "GL_ARB_debug_output",
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.provides = MPGL_CAP_DEBUG,
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.functions = (const struct gl_function[]) {
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// (only functions needed by us)
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DEF_FN(DebugMessageCallback),
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{0}
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},
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},
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// These don't exist - they are for the sake of mpv internals, and libmpv
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// interaction (see libmpv/opengl_cb.h).
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{
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.extension = "GL_MP_MPGetNativeDisplay",
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.functions = (const struct gl_function[]) {
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DEF_FN(MPGetNativeDisplay),
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{0}
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},
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},
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// Same, but using the old name.
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{
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.extension = "GL_MP_D3D_interfaces",
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.functions = (const struct gl_function[]) {
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DEF_FN_NAME(MPGetNativeDisplay, "glMPGetD3DInterface"),
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{0}
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},
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},
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// uniform buffer object extensions, requires OpenGL 3.1.
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{
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.ver_core = 310,
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.extension = "GL_ARB_uniform_buffer_object",
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.functions = (const struct gl_function[]) {
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DEF_FN(GetUniformBlockIndex),
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DEF_FN(UniformBlockBinding),
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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_NAME
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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_functions2(GL *gl, void *(*get_fn)(void *ctx, const char *n),
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void *fn_ctx, 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) {
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.extensions = talloc_strdup(gl, ext2 ? ext2 : ""),
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};
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gl->GetString = get_fn(fn_ctx, "glGetString");
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if (!gl->GetString) {
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mp_err(log, "Can't load OpenGL functions.\n");
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goto error;
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}
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int major = 0, minor = 0;
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const char *version_string = gl->GetString(GL_VERSION);
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if (!version_string)
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goto error;
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mp_verbose(log, "GL_VERSION='%s'\n", version_string);
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if (strncmp(version_string, "OpenGL ES ", 10) == 0) {
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version_string += 10;
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gl->es = 100;
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}
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if (sscanf(version_string, "%d.%d", &major, &minor) < 2)
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goto error;
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gl->version = MPGL_VER(major, minor);
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mp_verbose(log, "Detected %s %d.%d.\n", gl->es ? "GLES" : "desktop OpenGL",
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major, minor);
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if (gl->es) {
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gl->es = gl->version;
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gl->version = 0;
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if (gl->es < 200) {
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mp_fatal(log, "At least GLESv2 required.\n");
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goto error;
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}
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}
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mp_verbose(log, "GL_VENDOR='%s'\n", gl->GetString(GL_VENDOR));
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mp_verbose(log, "GL_RENDERER='%s'\n", gl->GetString(GL_RENDERER));
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const char *shader = gl->GetString(GL_SHADING_LANGUAGE_VERSION);
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if (shader)
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mp_verbose(log, "GL_SHADING_LANGUAGE_VERSION='%s'\n", shader);
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if (gl->version >= 300) {
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gl->GetStringi = get_fn(fn_ctx, "glGetStringi");
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gl->GetIntegerv = get_fn(fn_ctx, "glGetIntegerv");
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if (!(gl->GetStringi && gl->GetIntegerv))
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goto error;
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GLint exts;
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gl->GetIntegerv(GL_NUM_EXTENSIONS, &exts);
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for (int n = 0; n < exts; n++) {
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const char *ext = gl->GetStringi(GL_EXTENSIONS, n);
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gl->extensions = talloc_asprintf_append(gl->extensions, " %s", ext);
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}
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} else {
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const char *ext = (char*)gl->GetString(GL_EXTENSIONS);
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gl->extensions = talloc_asprintf_append(gl->extensions, " %s", ext);
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}
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mp_dbg(log, "Combined OpenGL extensions string:\n%s\n", gl->extensions);
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for (int n = 0; n < MP_ARRAY_SIZE(gl_functions); n++) {
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const struct gl_functions *section = &gl_functions[n];
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int version = gl->es ? gl->es : gl->version;
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int ver_core = gl->es ? section->ver_es_core : section->ver_core;
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// NOTE: Function entrypoints can exist, even if they do not work.
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// We must always check extension strings and versions.
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bool exists = false, must_exist = false;
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if (ver_core)
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must_exist = version >= ver_core;
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if (section->extension && check_ext(gl, section->extension))
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exists = true;
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exists |= must_exist;
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if (!exists)
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continue;
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void *loaded[MAX_FN_COUNT] = {0};
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bool all_loaded = true;
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const struct gl_function *fnlist = section->functions;
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for (int i = 0; fnlist && fnlist[i].name; i++) {
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const struct gl_function *fn = &fnlist[i];
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void *ptr = get_fn(fn_ctx, fn->name);
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if (!ptr) {
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all_loaded = false;
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mp_warn(log, "Required function '%s' not "
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"found for %s OpenGL %d.%d.\n", fn->name,
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section->extension ? section->extension : "builtin",
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MPGL_VER_GET_MAJOR(ver_core),
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MPGL_VER_GET_MINOR(ver_core));
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if (must_exist)
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goto error;
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break;
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}
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assert(i < MAX_FN_COUNT);
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loaded[i] = ptr;
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}
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if (all_loaded) {
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gl->mpgl_caps |= section->provides;
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for (int i = 0; fnlist && fnlist[i].name; i++) {
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const struct gl_function *fn = &fnlist[i];
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void **funcptr = (void**)(((char*)gl) + fn->offset);
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if (loaded[i])
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*funcptr = loaded[i];
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}
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mp_verbose(log, "Loaded functions for %d/%s.\n", ver_core,
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section->extension ? section->extension : "builtin");
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}
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}
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gl->glsl_version = 0;
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if (gl->es) {
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if (gl->es >= 200)
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gl->glsl_version = 100;
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if (gl->es >= 300)
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gl->glsl_version = 300;
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} else {
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gl->glsl_version = 110;
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int glsl_major = 0, glsl_minor = 0;
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if (sscanf(shader, "%d.%d", &glsl_major, &glsl_minor) == 2)
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gl->glsl_version = glsl_major * 100 + glsl_minor;
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// GLSL 400 defines "sample" as keyword - breaks custom shaders.
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gl->glsl_version = MPMIN(gl->glsl_version, 330);
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}
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if (is_software_gl(gl)) {
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gl->mpgl_caps |= MPGL_CAP_SW;
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mp_verbose(log, "Detected suspected software renderer.\n");
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}
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// Provided for simpler handling if no framebuffer support is available.
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if (!gl->BindFramebuffer)
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gl->BindFramebuffer = &dummy_glBindFramebuffer;
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return;
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error:
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gl->version = 0;
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gl->es = 0;
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gl->mpgl_caps = 0;
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}
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static void *get_procaddr_wrapper(void *ctx, const char *name)
|
|
{
|
|
void *(*getProcAddress)(const GLubyte *) = ctx;
|
|
return getProcAddress ? getProcAddress((const GLubyte*)name) : NULL;
|
|
}
|
|
|
|
void mpgl_load_functions(GL *gl, void *(*getProcAddress)(const GLubyte *),
|
|
const char *ext2, struct mp_log *log)
|
|
{
|
|
mpgl_load_functions2(gl, get_procaddr_wrapper, getProcAddress, ext2, log);
|
|
}
|
|
|
|
extern const struct mpgl_driver mpgl_driver_x11;
|
|
extern const struct mpgl_driver mpgl_driver_x11egl;
|
|
extern const struct mpgl_driver mpgl_driver_drm_egl;
|
|
extern const struct mpgl_driver mpgl_driver_cocoa;
|
|
extern const struct mpgl_driver mpgl_driver_wayland;
|
|
extern const struct mpgl_driver mpgl_driver_w32;
|
|
extern const struct mpgl_driver mpgl_driver_rpi;
|
|
|
|
static const struct mpgl_driver *const backends[] = {
|
|
#if HAVE_RPI
|
|
&mpgl_driver_rpi,
|
|
#endif
|
|
#if HAVE_GL_COCOA
|
|
&mpgl_driver_cocoa,
|
|
#endif
|
|
#if HAVE_GL_WIN32
|
|
&mpgl_driver_w32,
|
|
#endif
|
|
#if HAVE_GL_WAYLAND
|
|
&mpgl_driver_wayland,
|
|
#endif
|
|
#if HAVE_EGL_X11
|
|
&mpgl_driver_x11egl,
|
|
#endif
|
|
#if HAVE_EGL_DRM
|
|
&mpgl_driver_drm_egl,
|
|
#endif
|
|
#if HAVE_GL_X11
|
|
&mpgl_driver_x11,
|
|
#endif
|
|
};
|
|
|
|
int mpgl_find_backend(const char *name)
|
|
{
|
|
if (name == NULL || strcmp(name, "auto") == 0)
|
|
return -1;
|
|
for (int n = 0; n < MP_ARRAY_SIZE(backends); n++) {
|
|
if (strcmp(backends[n]->name, name) == 0)
|
|
return n;
|
|
}
|
|
return -2;
|
|
}
|
|
|
|
int mpgl_validate_backend_opt(struct mp_log *log, const struct m_option *opt,
|
|
struct bstr name, struct bstr param)
|
|
{
|
|
if (bstr_equals0(param, "help")) {
|
|
mp_info(log, "OpenGL windowing backends:\n");
|
|
mp_info(log, " auto (autodetect)\n");
|
|
for (int n = 0; n < MP_ARRAY_SIZE(backends); n++)
|
|
mp_info(log, " %s\n", backends[n]->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;
|
|
}
|
|
|
|
#if HAVE_C11_TLS
|
|
static _Thread_local MPGLContext *current_context;
|
|
|
|
static void * GLAPIENTRY get_native_display(const char *name)
|
|
{
|
|
if (current_context && current_context->native_display_type &&
|
|
name && strcmp(current_context->native_display_type, name) == 0)
|
|
return current_context->native_display;
|
|
return NULL;
|
|
}
|
|
|
|
static void set_current_context(MPGLContext *context)
|
|
{
|
|
current_context = context;
|
|
if (context && !context->gl->MPGetNativeDisplay)
|
|
context->gl->MPGetNativeDisplay = get_native_display;
|
|
}
|
|
#else
|
|
static void set_current_context(MPGLContext *context)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static MPGLContext *init_backend(struct vo *vo, const struct mpgl_driver *driver,
|
|
bool probing, int vo_flags)
|
|
{
|
|
MPGLContext *ctx = talloc_ptrtype(NULL, ctx);
|
|
*ctx = (MPGLContext) {
|
|
.gl = talloc_zero(ctx, GL),
|
|
.vo = vo,
|
|
.driver = driver,
|
|
};
|
|
bool old_probing = vo->probing;
|
|
vo->probing = probing; // hack; kill it once backends are separate
|
|
MP_VERBOSE(vo, "Initializing OpenGL backend '%s'\n", ctx->driver->name);
|
|
ctx->priv = talloc_zero_size(ctx, ctx->driver->priv_size);
|
|
if (ctx->driver->init(ctx, vo_flags) < 0) {
|
|
vo->probing = old_probing;
|
|
talloc_free(ctx);
|
|
return NULL;
|
|
}
|
|
vo->probing = old_probing;
|
|
|
|
if (!ctx->gl->version && !ctx->gl->es)
|
|
goto cleanup;
|
|
|
|
if (ctx->gl->es && vo->probing) {
|
|
MP_INFO(ctx->vo, "Skipping experimental GLES support (use --vo=opengl).\n");
|
|
goto cleanup;
|
|
}
|
|
|
|
if (ctx->gl->mpgl_caps & MPGL_CAP_SW) {
|
|
MP_WARN(ctx->vo, "Suspected software renderer or indirect context.\n");
|
|
if (vo->probing && !(vo_flags & VOFLAG_SW))
|
|
goto cleanup;
|
|
}
|
|
|
|
ctx->gl->debug_context = !!(vo_flags & VOFLAG_GL_DEBUG);
|
|
|
|
set_current_context(ctx);
|
|
|
|
return ctx;
|
|
|
|
cleanup:
|
|
mpgl_uninit(ctx);
|
|
return NULL;
|
|
}
|
|
|
|
// Create a VO window and create a GL context on it.
|
|
// vo_flags: passed to the backend's create window function
|
|
MPGLContext *mpgl_init(struct vo *vo, const char *backend_name, int vo_flags)
|
|
{
|
|
MPGLContext *ctx = NULL;
|
|
int index = mpgl_find_backend(backend_name);
|
|
if (index == -1) {
|
|
for (int n = 0; n < MP_ARRAY_SIZE(backends); n++) {
|
|
ctx = init_backend(vo, backends[n], true, vo_flags);
|
|
if (ctx)
|
|
break;
|
|
}
|
|
// VO forced, but no backend is ok => force the first that works at all
|
|
if (!ctx && !vo->probing) {
|
|
for (int n = 0; n < MP_ARRAY_SIZE(backends); n++) {
|
|
ctx = init_backend(vo, backends[n], false, vo_flags);
|
|
if (ctx)
|
|
break;
|
|
}
|
|
}
|
|
} else if (index >= 0) {
|
|
ctx = init_backend(vo, backends[index], false, vo_flags);
|
|
}
|
|
return ctx;
|
|
}
|
|
|
|
int mpgl_reconfig_window(struct MPGLContext *ctx)
|
|
{
|
|
return ctx->driver->reconfig(ctx);
|
|
}
|
|
|
|
int mpgl_control(struct MPGLContext *ctx, int *events, int request, void *arg)
|
|
{
|
|
return ctx->driver->control(ctx, events, request, arg);
|
|
}
|
|
|
|
void mpgl_swap_buffers(struct MPGLContext *ctx)
|
|
{
|
|
ctx->driver->swap_buffers(ctx);
|
|
}
|
|
|
|
void mpgl_uninit(MPGLContext *ctx)
|
|
{
|
|
set_current_context(NULL);
|
|
if (ctx)
|
|
ctx->driver->uninit(ctx);
|
|
talloc_free(ctx);
|
|
}
|