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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/>.
*/
#include <stddef.h>
#include <assert.h>
#include "common/common.h"
#include "context.h"
#include "context_rpi.h"
static void *get_proc_address(const GLubyte *name)
{
void *p = eglGetProcAddress(name);
// EGL 1.4 (supported by the RPI firmware) does not necessarily return
// function pointers for core 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 mp_egl_rpi *p)
{
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(p, "Could find EGL configuration!\n");
return NULL;
}
return config;
}
int mp_egl_rpi_init(struct mp_egl_rpi *p, DISPMANX_ELEMENT_HANDLE_T window,
int w, int h)
{
p->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (!eglInitialize(p->egl_display, NULL, NULL)) {
MP_FATAL(p, "EGL failed to initialize.\n");
goto fail;
}
eglBindAPI(EGL_OPENGL_ES_API);
EGLConfig config = select_fb_config_egl(p);
if (!config)
goto fail;
p->egl_window = (EGL_DISPMANX_WINDOW_T){
.element = 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(p, "Could not create EGL surface!\n");
goto fail;
}
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(p, "Could not create EGL context!\n");
goto fail;
}
eglMakeCurrent(p->egl_display, p->egl_surface, p->egl_surface,
p->egl_context);
p->gl = talloc_zero(NULL, struct GL);
const char *exts = eglQueryString(p->egl_display, EGL_EXTENSIONS);
mpgl_load_functions(p->gl, get_proc_address, exts, p->log);
if (!p->gl->version && !p->gl->es)
goto fail;
return 0;
fail:
mp_egl_rpi_destroy(p);
return -1;
}
void mp_egl_rpi_destroy(struct mp_egl_rpi *p)
{
if (p->egl_display) {
eglMakeCurrent(p->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
EGL_NO_CONTEXT);
}
if (p->egl_surface)
eglDestroySurface(p->egl_display, p->egl_surface);
if (p->egl_context)
eglDestroyContext(p->egl_display, p->egl_context);
p->egl_context = EGL_NO_CONTEXT;
eglReleaseThread();
p->egl_display = EGL_NO_DISPLAY;
talloc_free(p->gl);
p->gl = NULL;
}
struct priv {
DISPMANX_DISPLAY_HANDLE_T display;
DISPMANX_ELEMENT_HANDLE_T window;
DISPMANX_UPDATE_HANDLE_T update;
struct mp_egl_rpi egl;
int w, h;
};
static void rpi_uninit(MPGLContext *ctx)
{
struct priv *p = ctx->priv;
mp_egl_rpi_destroy(&p->egl);
if (p->display)
vc_dispmanx_display_close(p->display);
}
static int rpi_init(struct MPGLContext *ctx, int flags)
{
struct priv *p = ctx->priv;
struct vo *vo = ctx->vo;
p->egl.log = vo->log;
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");
goto fail;
}
uint32_t w, h;
if (graphics_get_display_size(0, &w, &h) < 0) {
MP_FATAL(ctx->vo, "Could not get display size.\n");
goto fail;
}
// 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_FROM_SOURCE,
.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");
goto fail;
}
vc_dispmanx_update_submit_sync(p->update);
if (mp_egl_rpi_init(&p->egl, p->window, w, h) < 0)
goto fail;
ctx->gl = p->egl.gl;
vo->dwidth = p->w = w;
vo->dheight = p->h = h;
return 0;
fail:
rpi_uninit(ctx);
return -1;
}
static int rpi_reconfig(struct MPGLContext *ctx)
{
struct priv *p = ctx->priv;
ctx->vo->dwidth = p->w;
ctx->vo->dheight = p->h;
return 0;
}
static void rpi_swap_buffers(MPGLContext *ctx)
{
struct priv *p = ctx->priv;
eglSwapBuffers(p->egl.egl_display, p->egl.egl_surface);
}
static int rpi_control(MPGLContext *ctx, int *events, int request, void *arg)
{
return VO_NOTIMPL;
}
const struct mpgl_driver mpgl_driver_rpi = {
.name = "rpi",
.priv_size = sizeof(struct priv),
.init = rpi_init,
.reconfig = rpi_reconfig,
.swap_buffers = rpi_swap_buffers,
.control = rpi_control,
.uninit = rpi_uninit,
};
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