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mpv/video/out/gl_x11.c

307 lines
9.5 KiB
C

/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*
* You can alternatively redistribute this file and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*/
#include <X11/Xlib.h>
#include <GL/glx.h>
#define MP_GET_GLX_WORKAROUNDS
#include "gl_header_fixes.h"
#include "x11_common.h"
#include "gl_common.h"
struct glx_context {
XVisualInfo *vinfo;
GLXContext context;
GLXFBConfig fbc;
};
static bool create_context_x11_old(struct MPGLContext *ctx)
{
struct glx_context *glx_ctx = ctx->priv;
Display *display = ctx->vo->x11->display;
struct vo *vo = ctx->vo;
GL *gl = ctx->gl;
if (glx_ctx->context)
return true;
if (!glx_ctx->vinfo) {
MP_FATAL(vo, "Can't create a legacy GLX context without X visual\n");
return false;
}
GLXContext new_context = glXCreateContext(display, glx_ctx->vinfo, NULL,
True);
if (!new_context) {
MP_FATAL(vo, "Could not create GLX context!\n");
return false;
}
if (!glXMakeCurrent(display, ctx->vo->x11->window, new_context)) {
MP_FATAL(vo, "Could not set GLX context!\n");
glXDestroyContext(display, new_context);
return false;
}
const char *glxstr = glXQueryExtensionsString(display, ctx->vo->x11->screen);
mpgl_load_functions(gl, (void *)glXGetProcAddressARB, glxstr, vo->log);
glx_ctx->context = new_context;
return true;
}
typedef GLXContext (*glXCreateContextAttribsARBProc)
(Display*, GLXFBConfig, GLXContext, Bool, const int*);
static bool create_context_x11_gl3(struct MPGLContext *ctx, int vo_flags,
int gl_version, bool es)
{
struct glx_context *glx_ctx = ctx->priv;
struct vo *vo = ctx->vo;
if (glx_ctx->context)
return true;
glXCreateContextAttribsARBProc glXCreateContextAttribsARB =
(glXCreateContextAttribsARBProc)
glXGetProcAddressARB((const GLubyte *)"glXCreateContextAttribsARB");
const char *glxstr =
glXQueryExtensionsString(vo->x11->display, vo->x11->screen);
bool have_ctx_ext = glxstr && !!strstr(glxstr, "GLX_ARB_create_context");
if (!(have_ctx_ext && glXCreateContextAttribsARB)) {
return false;
}
int ctx_flags = vo_flags & VOFLAG_GL_DEBUG ? GLX_CONTEXT_DEBUG_BIT_ARB : 0;
int profile_mask = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
if (es) {
profile_mask = GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
if (!(glxstr && strstr(glxstr, "GLX_EXT_create_context_es2_profile")))
return false;
}
int context_attribs[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, MPGL_VER_GET_MAJOR(gl_version),
GLX_CONTEXT_MINOR_VERSION_ARB, MPGL_VER_GET_MINOR(gl_version),
GLX_CONTEXT_PROFILE_MASK_ARB, profile_mask,
GLX_CONTEXT_FLAGS_ARB, ctx_flags,
None
};
GLXContext context = glXCreateContextAttribsARB(vo->x11->display,
glx_ctx->fbc, 0, True,
context_attribs);
if (!context) {
MP_INFO(vo, "Could not create GL3 context. Retrying with legacy context.\n");
return false;
}
// set context
if (!glXMakeCurrent(vo->x11->display, vo->x11->window, context)) {
MP_FATAL(vo, "Could not set GLX context!\n");
glXDestroyContext(vo->x11->display, context);
return false;
}
glx_ctx->context = context;
mpgl_load_functions(ctx->gl, (void *)glXGetProcAddressARB, glxstr, vo->log);
return true;
}
// The GL3/FBC initialization code roughly follows/copies from:
// http://www.opengl.org/wiki/Tutorial:_OpenGL_3.0_Context_Creation_(GLX)
// but also uses some of the old code.
static GLXFBConfig select_fb_config(struct vo *vo, const int *attribs, int flags)
{
int fbcount;
GLXFBConfig *fbc = glXChooseFBConfig(vo->x11->display, vo->x11->screen,
attribs, &fbcount);
if (!fbc)
return NULL;
// The list in fbc is sorted (so that the first element is the best).
GLXFBConfig fbconfig = fbcount > 0 ? fbc[0] : NULL;
if (flags & VOFLAG_ALPHA) {
for (int n = 0; n < fbcount; n++) {
XVisualInfo *v = glXGetVisualFromFBConfig(vo->x11->display, fbc[n]);
if (!v)
continue;
// This is a heuristic at best. Note that normal 8 bit Visuals use
// a depth of 24, even if the pixels are padded to 32 bit. If the
// depth is higher than 24, the remaining bits must be alpha.
// Note: vinfo->bits_per_rgb appears to be useless (is always 8).
unsigned long mask = v->depth == 32 ?
(unsigned long)-1 : (1 << (unsigned long)v->depth) - 1;
if (mask & ~(v->red_mask | v->green_mask | v->blue_mask)) {
fbconfig = fbc[n];
break;
}
}
}
XFree(fbc);
return fbconfig;
}
static void set_glx_attrib(int *attribs, int name, int value)
{
for (int n = 0; attribs[n * 2 + 0] != None; n++) {
if (attribs[n * 2 + 0] == name) {
attribs[n * 2 + 1] = value;
break;
}
}
}
static bool config_window_x11(struct MPGLContext *ctx, int flags)
{
struct vo *vo = ctx->vo;
struct glx_context *glx_ctx = ctx->priv;
int glx_major, glx_minor;
if (!glXQueryVersion(vo->x11->display, &glx_major, &glx_minor)) {
MP_ERR(vo, "GLX not found.\n");
return false;
}
// FBConfigs were added in GLX version 1.3.
if (MPGL_VER(glx_major, glx_minor) < MPGL_VER(1, 3)) {
MP_ERR(vo, "GLX version older than 1.3.\n");
return false;
}
int glx_attribs[] = {
GLX_X_RENDERABLE, True,
GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 0,
GLX_DOUBLEBUFFER, True,
None
};
GLXFBConfig fbc = NULL;
if (flags & VOFLAG_ALPHA) {
set_glx_attrib(glx_attribs, GLX_ALPHA_SIZE, 1);
fbc = select_fb_config(vo, glx_attribs, flags);
if (!fbc) {
set_glx_attrib(glx_attribs, GLX_ALPHA_SIZE, 0);
flags &= ~VOFLAG_ALPHA;
}
}
if (!fbc)
fbc = select_fb_config(vo, glx_attribs, flags);
if (!fbc) {
MP_ERR(vo, "no GLX support present\n");
return false;
}
MP_VERBOSE(vo, "GLX chose FB config with ID 0x%x\n", (int)(intptr_t)fbc);
glx_ctx->fbc = fbc;
glx_ctx->vinfo = glXGetVisualFromFBConfig(vo->x11->display, fbc);
if (glx_ctx->vinfo) {
MP_VERBOSE(vo, "GLX chose visual with ID 0x%x\n",
(int)glx_ctx->vinfo->visualid);
} else {
MP_WARN(vo, "Selected GLX FB config has no associated X visual\n");
}
glXGetFBConfigAttrib(vo->x11->display, fbc, GLX_RED_SIZE, &ctx->depth_r);
glXGetFBConfigAttrib(vo->x11->display, fbc, GLX_GREEN_SIZE, &ctx->depth_g);
glXGetFBConfigAttrib(vo->x11->display, fbc, GLX_BLUE_SIZE, &ctx->depth_b);
vo_x11_config_vo_window(vo, glx_ctx->vinfo, flags | VOFLAG_HIDDEN, "gl");
bool success = false;
if (!(flags & VOFLAG_GLES)) {
success = create_context_x11_gl3(ctx, flags, 300, false);
if (!success)
success = create_context_x11_old(ctx);
}
if (!success) // try ES
success = create_context_x11_gl3(ctx, flags, 200, true);
if (success && !glXIsDirect(vo->x11->display, glx_ctx->context))
ctx->gl->mpgl_caps |= MPGL_CAP_SW;
return success;
}
static int glx_init(struct MPGLContext *ctx, int vo_flags)
{
if (vo_x11_init(ctx->vo) && config_window_x11(ctx, vo_flags))
return 0;
vo_x11_uninit(ctx->vo);
return -1;
}
static int glx_reconfig(struct MPGLContext *ctx, int flags)
{
struct glx_context *glx_ctx = ctx->priv;
vo_x11_config_vo_window(ctx->vo, glx_ctx->vinfo, flags, "gl");
return 0;
}
static int glx_control(struct MPGLContext *ctx, int *events, int request,
void *arg)
{
return vo_x11_control(ctx->vo, events, request, arg);
}
static void glx_uninit(MPGLContext *ctx)
{
struct glx_context *glx_ctx = ctx->priv;
XVisualInfo **vinfo = &glx_ctx->vinfo;
GLXContext *context = &glx_ctx->context;
Display *display = ctx->vo->x11->display;
if (*vinfo)
XFree(*vinfo);
if (*context) {
glXMakeCurrent(display, None, NULL);
glXDestroyContext(display, *context);
}
vo_x11_uninit(ctx->vo);
}
static void glx_swap_buffers(struct MPGLContext *ctx)
{
glXSwapBuffers(ctx->vo->x11->display, ctx->vo->x11->window);
}
const struct mpgl_driver mpgl_driver_x11 = {
.name = "x11",
.priv_size = sizeof(struct glx_context),
.init = glx_init,
.reconfig = glx_reconfig,
.swap_buffers = glx_swap_buffers,
.control = glx_control,
.uninit = glx_uninit,
};