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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 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 <stddef.h>
#include <assert.h>
#include <bcm_host.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include "common/common.h"
#include "x11_common.h"
#include "gl_common.h"
struct priv {
EGLDisplay egl_display;
EGLContext egl_context;
EGLSurface egl_surface;
DISPMANX_DISPLAY_HANDLE_T display;
DISPMANX_ELEMENT_HANDLE_T window;
DISPMANX_UPDATE_HANDLE_T update;
// yep, the API keeps a pointer to it
EGL_DISPMANX_WINDOW_T egl_window;
int w, h;
};
static void *get_proc_address(const GLubyte *name)
{
void *p = eglGetProcAddress(name);
// It looks like eglGetProcAddress() should work even for builtin
// functions, but it doesn't work at least with RPI/Broadcom crap.
// (EGL 1.4, which current RPI firmware pretends to support, definitely
// is required to return non-extension functions.)
if (!p) {
void *h = dlopen("/opt/vc/lib/libGLESv2.so", RTLD_LAZY);
if (h) {
p = dlsym(h, name);
dlclose(h);
}
}
return p;
}
static EGLConfig select_fb_config_egl(struct MPGLContext *ctx)
{
struct priv *p = ctx->priv;
EGLint attributes[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_DEPTH_SIZE, 0,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_NONE
};
EGLint config_count;
EGLConfig config;
eglChooseConfig(p->egl_display, attributes, &config, 1, &config_count);
if (!config_count) {
MP_FATAL(ctx->vo, "Could find EGL configuration!\n");
return NULL;
}
return config;
}
static bool sc_config_window(struct MPGLContext *ctx, int flags)
{
struct priv *p = ctx->priv;
struct vo *vo = ctx->vo;
if (p->egl_context) {
vo->dwidth = p->w;
vo->dheight = p->h;
return true;
}
bcm_host_init();
p->display = vc_dispmanx_display_open(0);
p->update = vc_dispmanx_update_start(0);
if (!p->display || !p->update) {
MP_FATAL(ctx->vo, "Could not get DISPMANX objects.\n");
return false;
}
uint32_t w, h;
if (graphics_get_display_size(0, &w, &h) < 0) {
MP_FATAL(ctx->vo, "Could not get display size.\n");
return false;
}
// dispmanx is like a neanderthal version of Wayland - you can add an
// overlay any place on the screen. Just use the whole screen.
VC_RECT_T dst = {.width = w, .height = h};
VC_RECT_T src = {.width = w << 16, .height = h << 16};
VC_DISPMANX_ALPHA_T alpha = {
.flags = DISPMANX_FLAGS_ALPHA_FIXED_ALL_PIXELS,
.opacity = 0xFF,
};
p->window = vc_dispmanx_element_add(p->update, p->display, 1, &dst, 0,
&src, DISPMANX_PROTECTION_NONE, &alpha, 0, 0);
if (!p->window) {
MP_FATAL(ctx->vo, "Could not add DISPMANX element.\n");
return false;
}
vc_dispmanx_update_submit_sync(p->update);
p->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (!eglInitialize(p->egl_display, NULL, NULL)) {
MP_FATAL(ctx->vo, "EGL failed to initialize.\n");
return false;
}
eglBindAPI(EGL_OPENGL_ES_API);
EGLConfig config = select_fb_config_egl(ctx);
if (!config)
return false;
p->egl_window = (EGL_DISPMANX_WINDOW_T){.element = p->window, .width = w, .height = h};
p->egl_surface = eglCreateWindowSurface(p->egl_display, config, &p->egl_window, NULL);
if (p->egl_surface == EGL_NO_SURFACE) {
MP_FATAL(ctx->vo, "Could not create EGL surface!\n");
return false;
}
EGLint context_attributes[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
p->egl_context = eglCreateContext(p->egl_display, config,
EGL_NO_CONTEXT, context_attributes);
if (p->egl_context == EGL_NO_CONTEXT) {
MP_FATAL(ctx->vo, "Could not create EGL context!\n");
return false;
}
eglMakeCurrent(p->egl_display, p->egl_surface, p->egl_surface,
p->egl_context);
const char *exts = eglQueryString(p->egl_display, EGL_EXTENSIONS);
mpgl_load_functions(ctx->gl, get_proc_address, exts, vo->log);
vo->dwidth = p->w = w;
vo->dheight = p->h = h;
return true;
}
static void sc_releaseGlContext(MPGLContext *ctx)
{
struct priv *p = ctx->priv;
if (p->egl_context) {
eglMakeCurrent(p->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
EGL_NO_CONTEXT);
eglDestroyContext(p->egl_display, p->egl_context);
}
p->egl_context = EGL_NO_CONTEXT;
eglTerminate(p->egl_display);
vc_dispmanx_display_close(p->display);
}
static void sc_swapGlBuffers(MPGLContext *ctx)
{
struct priv *p = ctx->priv;
eglSwapBuffers(p->egl_display, p->egl_surface);
}
static int sc_vo_init(struct vo *vo)
{
return 1;
}
static void sc_vo_uninit(struct vo *vo)
{
}
static int sc_vo_control(struct vo *vo, int *events, int request, void *arg)
{
return VO_NOTIMPL;
}
void mpgl_set_backend_rpi(MPGLContext *ctx)
{
ctx->priv = talloc_zero(ctx, struct priv);
ctx->config_window = sc_config_window;
ctx->releaseGlContext = sc_releaseGlContext;
ctx->swapGlBuffers = sc_swapGlBuffers;
ctx->vo_init = sc_vo_init;
ctx->vo_uninit = sc_vo_uninit;
ctx->vo_control = sc_vo_control;
}
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