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mpv/video/out/opengl/common.h
Dudemanguy f8e62d3d82 egl_helpers: fix create_context fallback behavior 
The EGL stuff is really complicated because of historical reasons
(tl;dr: blame EGL). There was one edge case with EGL context creation
that lead to incorrect behavior. EGL_KHR_create_context was created with
EGL 1.4 (which mpv does support) but it is still possible for an EGL 1.4
device to not implement this extension. That means that none of the EGL
attrs that pass a specific opengl version work. So for this obscure
case, there is a fallback context creation at the very end which simply
creates an EGLContext without passing any special attrs.

This has another problem however. mpv has a hard requirement on at least
desktop opengl 2.1 or opengl ES 2.0 to function (we're not asking for
much here). Since the fallback EGL context creation has no version
checking, it is entirely possible to create an EGL context with a
desktop opengl version under 2.1. As you get further along in the code,
the user will encounter the hard opengl version check and then error
out. However, we're supposed to also actually check if GLES works
(that's what the opengl-es=auto option is for) so this is a bug.

The fix is to do a bit of code duplication and make a mpgl_check_version
specifically for if we hit the edge case of needing to create an EGL
context without the EGL_KHR_create_context extension. Grab the version
with the function pointer, check if it's under 210, if so destroy the
EGL context and set it to NULL. After that, if the user has set
opengl-es to auto, mpv will try GLES next. If it is set to no, then mpv
will simply fail as desired. Fixes #5915.

Sidenote: the ra_gl_ctx_test_version originally testing 140 doesn't make
any sense. Passing the version number in that function only does
something if the user has set opengl-restrict. What we need to do is to
pass the version of the created context to that function. If the version
is higher than the opengl-restrict option, then make this a failure.
2021-07-25 15:32:53 +00:00

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MPLAYER_GL_COMMON_H
#define MPLAYER_GL_COMMON_H
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include "config.h"
#include "common/msg.h"
#include "misc/bstr.h"
#include "video/csputils.h"
#include "video/mp_image.h"
#include "video/out/vo.h"
#include "video/out/gpu/ra.h"
#include "gl_headers.h"
#if HAVE_GL_WIN32
#include <windows.h>
#endif
struct GL;
typedef struct GL GL;
enum {
MPGL_CAP_ROW_LENGTH = (1 << 4), // GL_[UN]PACK_ROW_LENGTH
MPGL_CAP_FB = (1 << 5),
MPGL_CAP_VAO = (1 << 6),
MPGL_CAP_TEX_RG = (1 << 10), // GL_ARB_texture_rg / GL 3.x
MPGL_CAP_VDPAU = (1 << 11), // GL_NV_vdpau_interop
MPGL_CAP_APPLE_RGB_422 = (1 << 12), // GL_APPLE_rgb_422
MPGL_CAP_1D_TEX = (1 << 14),
MPGL_CAP_3D_TEX = (1 << 15),
MPGL_CAP_DEBUG = (1 << 16),
MPGL_CAP_DXINTEROP = (1 << 17), // WGL_NV_DX_interop
MPGL_CAP_EXT16 = (1 << 18), // GL_EXT_texture_norm16
MPGL_CAP_ARB_FLOAT = (1 << 19), // GL_ARB_texture_float
MPGL_CAP_EXT_CR_HFLOAT = (1 << 20), // GL_EXT_color_buffer_half_float
MPGL_CAP_UBO = (1 << 21), // GL_ARB_uniform_buffer_object
MPGL_CAP_SSBO = (1 << 22), // GL_ARB_shader_storage_buffer_object
MPGL_CAP_COMPUTE_SHADER = (1 << 23), // GL_ARB_compute_shader & GL_ARB_shader_image_load_store
MPGL_CAP_NESTED_ARRAY = (1 << 24), // GL_ARB_arrays_of_arrays
MPGL_CAP_SW = (1 << 30), // indirect or sw renderer
};
// E.g. 310 means 3.1
// Code doesn't have to use the macros; they are for convenience only.
#define MPGL_VER(major, minor) (((major) * 100) + (minor) * 10)
#define MPGL_VER_GET_MAJOR(ver) ((unsigned)(ver) / 100)
#define MPGL_VER_GET_MINOR(ver) ((unsigned)(ver) % 100 / 10)
#define MPGL_VER_P(ver) MPGL_VER_GET_MAJOR(ver), MPGL_VER_GET_MINOR(ver)
void mpgl_check_version(GL *gl, void *(*get_fn)(void *ctx, const char *n),
void *fn_ctx);
void mpgl_load_functions(GL *gl, void *(*getProcAddress)(const GLubyte *),
const char *ext2, struct mp_log *log);
void mpgl_load_functions2(GL *gl, void *(*get_fn)(void *ctx, const char *n),
void *fn_ctx, const char *ext2, struct mp_log *log);
typedef void (GLAPIENTRY *MP_GLDEBUGPROC)(GLenum, GLenum, GLuint, GLenum,
GLsizei, const GLchar *,const void *);
//function pointers loaded from the OpenGL library
struct GL {
int version; // MPGL_VER() mangled (e.g. 210 for 2.1)
int es; // es version (e.g. 300), 0 for desktop GL
int glsl_version; // e.g. 130 for GLSL 1.30
char *extensions; // Equivalent to GL_EXTENSIONS
int mpgl_caps; // Bitfield of MPGL_CAP_* constants
bool debug_context; // use of e.g. GLX_CONTEXT_DEBUG_BIT_ARB
void (GLAPIENTRY *Viewport)(GLint, GLint, GLsizei, GLsizei);
void (GLAPIENTRY *Clear)(GLbitfield);
void (GLAPIENTRY *GenTextures)(GLsizei, GLuint *);
void (GLAPIENTRY *DeleteTextures)(GLsizei, const GLuint *);
void (GLAPIENTRY *ClearColor)(GLclampf, GLclampf, GLclampf, GLclampf);
void (GLAPIENTRY *Enable)(GLenum);
void (GLAPIENTRY *Disable)(GLenum);
const GLubyte *(GLAPIENTRY * GetString)(GLenum);
void (GLAPIENTRY *BlendFuncSeparate)(GLenum, GLenum, GLenum, GLenum);
void (GLAPIENTRY *Flush)(void);
void (GLAPIENTRY *Finish)(void);
void (GLAPIENTRY *PixelStorei)(GLenum, GLint);
void (GLAPIENTRY *TexImage1D)(GLenum, GLint, GLint, GLsizei, GLint,
GLenum, GLenum, const GLvoid *);
void (GLAPIENTRY *TexImage2D)(GLenum, GLint, GLint, GLsizei, GLsizei,
GLint, GLenum, GLenum, const GLvoid *);
void (GLAPIENTRY *TexSubImage2D)(GLenum, GLint, GLint, GLint,
GLsizei, GLsizei, GLenum, GLenum,
const GLvoid *);
void (GLAPIENTRY *TexParameteri)(GLenum, GLenum, GLint);
void (GLAPIENTRY *GetIntegerv)(GLenum, GLint *);
void (GLAPIENTRY *ReadPixels)(GLint, GLint, GLsizei, GLsizei, GLenum,
GLenum, GLvoid *);
void (GLAPIENTRY *ReadBuffer)(GLenum);
void (GLAPIENTRY *DrawArrays)(GLenum, GLint, GLsizei);
GLenum (GLAPIENTRY *GetError)(void);
void (GLAPIENTRY *GetTexLevelParameteriv)(GLenum, GLint, GLenum, GLint *);
void (GLAPIENTRY *Scissor)(GLint, GLint, GLsizei, GLsizei);
void (GLAPIENTRY *GenBuffers)(GLsizei, GLuint *);
void (GLAPIENTRY *DeleteBuffers)(GLsizei, const GLuint *);
void (GLAPIENTRY *BindBuffer)(GLenum, GLuint);
void (GLAPIENTRY *BindBufferBase)(GLenum, GLuint, GLuint);
GLvoid * (GLAPIENTRY *MapBufferRange)(GLenum, GLintptr, GLsizeiptr,
GLbitfield);
GLboolean (GLAPIENTRY *UnmapBuffer)(GLenum);
void (GLAPIENTRY *BufferData)(GLenum, intptr_t, const GLvoid *, GLenum);
void (GLAPIENTRY *BufferSubData)(GLenum, GLintptr, GLsizeiptr, const GLvoid *);
void (GLAPIENTRY *ActiveTexture)(GLenum);
void (GLAPIENTRY *BindTexture)(GLenum, GLuint);
int (GLAPIENTRY *SwapInterval)(int);
void (GLAPIENTRY *TexImage3D)(GLenum, GLint, GLenum, GLsizei, GLsizei,
GLsizei, GLint, GLenum, GLenum,
const GLvoid *);
void (GLAPIENTRY *GenVertexArrays)(GLsizei, GLuint *);
void (GLAPIENTRY *BindVertexArray)(GLuint);
GLint (GLAPIENTRY *GetAttribLocation)(GLuint, const GLchar *);
void (GLAPIENTRY *EnableVertexAttribArray)(GLuint);
void (GLAPIENTRY *DisableVertexAttribArray)(GLuint);
void (GLAPIENTRY *VertexAttribPointer)(GLuint, GLint, GLenum, GLboolean,
GLsizei, const GLvoid *);
void (GLAPIENTRY *DeleteVertexArrays)(GLsizei, const GLuint *);
void (GLAPIENTRY *UseProgram)(GLuint);
GLint (GLAPIENTRY *GetUniformLocation)(GLuint, const GLchar *);
void (GLAPIENTRY *CompileShader)(GLuint);
GLuint (GLAPIENTRY *CreateProgram)(void);
GLuint (GLAPIENTRY *CreateShader)(GLenum);
void (GLAPIENTRY *ShaderSource)(GLuint, GLsizei, const GLchar **,
const GLint *);
void (GLAPIENTRY *LinkProgram)(GLuint);
void (GLAPIENTRY *AttachShader)(GLuint, GLuint);
void (GLAPIENTRY *DeleteShader)(GLuint);
void (GLAPIENTRY *DeleteProgram)(GLuint);
void (GLAPIENTRY *GetShaderInfoLog)(GLuint, GLsizei, GLsizei *, GLchar *);
void (GLAPIENTRY *GetShaderiv)(GLuint, GLenum, GLint *);
void (GLAPIENTRY *GetProgramInfoLog)(GLuint, GLsizei, GLsizei *, GLchar *);
void (GLAPIENTRY *GetProgramiv)(GLenum, GLenum, GLint *);
void (GLAPIENTRY *GetProgramBinary)(GLuint, GLsizei, GLsizei *, GLenum *,
void *);
void (GLAPIENTRY *ProgramBinary)(GLuint, GLenum, const void *, GLsizei);
void (GLAPIENTRY *DispatchCompute)(GLuint, GLuint, GLuint);
void (GLAPIENTRY *BindImageTexture)(GLuint, GLuint, GLint, GLboolean,
GLint, GLenum, GLenum);
void (GLAPIENTRY *MemoryBarrier)(GLbitfield);
const GLubyte* (GLAPIENTRY *GetStringi)(GLenum, GLuint);
void (GLAPIENTRY *BindAttribLocation)(GLuint, GLuint, const GLchar *);
void (GLAPIENTRY *BindFramebuffer)(GLenum, GLuint);
void (GLAPIENTRY *GenFramebuffers)(GLsizei, GLuint *);
void (GLAPIENTRY *DeleteFramebuffers)(GLsizei, const GLuint *);
GLenum (GLAPIENTRY *CheckFramebufferStatus)(GLenum);
void (GLAPIENTRY *FramebufferTexture2D)(GLenum, GLenum, GLenum, GLuint,
GLint);
void (GLAPIENTRY *BlitFramebuffer)(GLint, GLint, GLint, GLint, GLint, GLint,
GLint, GLint, GLbitfield, GLenum);
void (GLAPIENTRY *GetFramebufferAttachmentParameteriv)(GLenum, GLenum,
GLenum, GLint *);
void (GLAPIENTRY *Uniform1f)(GLint, GLfloat);
void (GLAPIENTRY *Uniform2f)(GLint, GLfloat, GLfloat);
void (GLAPIENTRY *Uniform3f)(GLint, GLfloat, GLfloat, GLfloat);
void (GLAPIENTRY *Uniform4f)(GLint, GLfloat, GLfloat, GLfloat, GLfloat);
void (GLAPIENTRY *Uniform1i)(GLint, GLint);
void (GLAPIENTRY *UniformMatrix2fv)(GLint, GLsizei, GLboolean,
const GLfloat *);
void (GLAPIENTRY *UniformMatrix3fv)(GLint, GLsizei, GLboolean,
const GLfloat *);
void (GLAPIENTRY *InvalidateTexImage)(GLuint, GLint);
void (GLAPIENTRY *InvalidateFramebuffer)(GLenum, GLsizei, const GLenum *);
GLsync (GLAPIENTRY *FenceSync)(GLenum, GLbitfield);
GLenum (GLAPIENTRY *ClientWaitSync)(GLsync, GLbitfield, GLuint64);
void (GLAPIENTRY *DeleteSync)(GLsync sync);
void (GLAPIENTRY *BufferStorage)(GLenum, intptr_t, const GLvoid *, GLenum);
void (GLAPIENTRY *GenQueries)(GLsizei, GLuint *);
void (GLAPIENTRY *DeleteQueries)(GLsizei, const GLuint *);
void (GLAPIENTRY *BeginQuery)(GLenum, GLuint);
void (GLAPIENTRY *EndQuery)(GLenum);
void (GLAPIENTRY *QueryCounter)(GLuint, GLenum);
GLboolean (GLAPIENTRY *IsQuery)(GLuint);
void (GLAPIENTRY *GetQueryObjectiv)(GLuint, GLenum, GLint *);
void (GLAPIENTRY *GetQueryObjecti64v)(GLuint, GLenum, GLint64 *);
void (GLAPIENTRY *GetQueryObjectuiv)(GLuint, GLenum, GLuint *);
void (GLAPIENTRY *GetQueryObjectui64v)(GLuint, GLenum, GLuint64 *);
void (GLAPIENTRY *VDPAUInitNV)(const GLvoid *, const GLvoid *);
void (GLAPIENTRY *VDPAUFiniNV)(void);
GLvdpauSurfaceNV (GLAPIENTRY *VDPAURegisterOutputSurfaceNV)
(GLvoid *, GLenum, GLsizei, const GLuint *);
GLvdpauSurfaceNV (GLAPIENTRY *VDPAURegisterVideoSurfaceNV)
(GLvoid *, GLenum, GLsizei, const GLuint *);
void (GLAPIENTRY *VDPAUUnregisterSurfaceNV)(GLvdpauSurfaceNV);
void (GLAPIENTRY *VDPAUSurfaceAccessNV)(GLvdpauSurfaceNV, GLenum);
void (GLAPIENTRY *VDPAUMapSurfacesNV)(GLsizei, const GLvdpauSurfaceNV *);
void (GLAPIENTRY *VDPAUUnmapSurfacesNV)(GLsizei, const GLvdpauSurfaceNV *);
#if HAVE_GL_WIN32
// The HANDLE type might not be present on non-Win32
BOOL (GLAPIENTRY *DXSetResourceShareHandleNV)(void *dxObject,
HANDLE shareHandle);
HANDLE (GLAPIENTRY *DXOpenDeviceNV)(void *dxDevice);
BOOL (GLAPIENTRY *DXCloseDeviceNV)(HANDLE hDevice);
HANDLE (GLAPIENTRY *DXRegisterObjectNV)(HANDLE hDevice, void *dxObject,
GLuint name, GLenum type, GLenum access);
BOOL (GLAPIENTRY *DXUnregisterObjectNV)(HANDLE hDevice, HANDLE hObject);
BOOL (GLAPIENTRY *DXLockObjectsNV)(HANDLE hDevice, GLint count,
HANDLE *hObjects);
BOOL (GLAPIENTRY *DXUnlockObjectsNV)(HANDLE hDevice, GLint count,
HANDLE *hObjects);
#endif
GLint (GLAPIENTRY *GetVideoSync)(GLuint *);
GLint (GLAPIENTRY *WaitVideoSync)(GLint, GLint, unsigned int *);
void (GLAPIENTRY *GetTranslatedShaderSourceANGLE)(GLuint, GLsizei,
GLsizei*, GLchar* source);
void (GLAPIENTRY *DebugMessageCallback)(MP_GLDEBUGPROC callback,
const void *userParam);
void *(GLAPIENTRY *MPGetNativeDisplay)(const char *name);
};
#endif /* MPLAYER_GL_COMMON_H */
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