RetroArch/gfx/drivers_context/emscriptenegl_ctx.c

352 lines
8.0 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2012-2015 - Michael Lelli
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <emscripten/emscripten.h>
#ifdef HAVE_CONFIG_H
#include "../../config.h"
#endif
#include "../../runloop.h"
#include "../video_context_driver.h"
#ifdef HAVE_EGL
#include "../common/egl_common.h"
#endif
#if defined(HAVE_OPENGL) || defined(HAVE_OPENGLES)
#include "../common/gl_common.h"
#endif
typedef struct
{
#ifdef HAVE_EGL
egl_ctx_data_t egl;
#endif
unsigned fb_width;
unsigned fb_height;
} emscripten_ctx_data_t;
static void gfx_ctx_emscripten_swap_interval(void *data, unsigned interval)
{
(void)data;
/* no way to control VSync in WebGL. */
(void)interval;
}
static void gfx_ctx_emscripten_check_window(void *data, bool *quit,
bool *resize, unsigned *width, unsigned *height, unsigned frame_count)
{
int input_width;
int input_height;
int is_fullscreen;
emscripten_ctx_data_t *emscripten = (emscripten_ctx_data_t*)data;
(void)data;
(void)frame_count;
emscripten_get_canvas_size(&input_width, &input_height, &is_fullscreen);
*width = (unsigned)input_width;
*height = (unsigned)input_height;
*resize = false;
if (*width != emscripten->fb_width || *height != emscripten->fb_height)
*resize = true;
emscripten->fb_width = (unsigned)input_width;
emscripten->fb_height = (unsigned)input_height;
*quit = false;
}
static void gfx_ctx_emscripten_swap_buffers(void *data, video_frame_info_t video_info)
{
(void)data;
/* no-op in emscripten, no way to force swap/wait for VSync in browsers */
}
static bool gfx_ctx_emscripten_set_resize(void *data,
unsigned width, unsigned height)
{
(void)data;
(void)width;
(void)height;
return false;
}
static void gfx_ctx_emscripten_update_window_title(void *data, video_frame_info_t video_info)
{
char buf[128];
char buf_fps[128];
buf[0] = buf_fps[0] = '\0';
video_monitor_get_fps(video_info, buf, sizeof(buf),
buf_fps, sizeof(buf_fps));
if (video_info.fps_show)
runloop_msg_queue_push(buf_fps, 1, 1, false);
}
static void gfx_ctx_emscripten_get_video_size(void *data,
unsigned *width, unsigned *height)
{
emscripten_ctx_data_t *emscripten = (emscripten_ctx_data_t*)data;
*width = emscripten->fb_width;
*height = emscripten->fb_height;
}
static void gfx_ctx_emscripten_destroy(void *data)
{
emscripten_ctx_data_t *emscripten = (emscripten_ctx_data_t*)data;
egl_destroy(&emscripten->egl);
free(data);
}
static void *gfx_ctx_emscripten_init(void *video_driver)
{
#ifdef HAVE_EGL
unsigned width, height;
EGLint major, minor;
EGLint n;
static const EGLint attribute_list[] =
{
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_DEPTH_SIZE, 16,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_NONE
};
static const EGLint context_attributes[] =
{
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
#endif
emscripten_ctx_data_t *emscripten = (emscripten_ctx_data_t*)
calloc(1, sizeof(*emscripten));
if (!emscripten)
return NULL;
(void)video_driver;
#ifdef HAVE_EGL
if (g_egl_inited)
{
RARCH_LOG("[EMSCRIPTEN/EGL]: Attempted to re-initialize driver.\n");
return (void*)"emscripten";
}
if (!egl_init_context(&emscripten->egl, EGL_DEFAULT_DISPLAY,
&major, &minor, &n, attribute_list))
{
egl_report_error();
goto error;
}
if (!egl_create_context(&emscripten->egl, context_attributes))
{
egl_report_error();
goto error;
}
if (!egl_create_surface(&emscripten->egl, 0))
goto error;
egl_get_video_size(&emscripten->egl, &width, &height);
emscripten->fb_width = width;
emscripten->fb_height = height;
RARCH_LOG("[EMSCRIPTEN/EGL]: Dimensions: %ux%u\n", width, height);
#endif
return emscripten;
error:
gfx_ctx_emscripten_destroy(video_driver);
return NULL;
}
static bool gfx_ctx_emscripten_set_video_mode(void *data,
unsigned width, unsigned height,
bool fullscreen)
{
(void)data;
if (g_egl_inited)
return false;
g_egl_inited = true;
return true;
}
static bool gfx_ctx_emscripten_bind_api(void *data,
enum gfx_ctx_api api, unsigned major, unsigned minor)
{
(void)data;
(void)major;
(void)minor;
switch (api)
{
case GFX_CTX_OPENGL_ES_API:
return eglBindAPI(EGL_OPENGL_ES_API);
default:
break;
}
return false;
}
static void gfx_ctx_emscripten_input_driver(void *data,
const input_driver_t **input, void **input_data)
{
(void)data;
*input = NULL;
*input_data = NULL;
#ifndef HAVE_SDL2
{
void *rwebinput = input_rwebinput.init();
if (!rwebinput)
return;
*input = &input_rwebinput;
*input_data = rwebinput;
}
#endif
}
static bool gfx_ctx_emscripten_has_focus(void *data)
{
(void)data;
return g_egl_inited;
}
static bool gfx_ctx_emscripten_suppress_screensaver(void *data, bool enable)
{
(void)data;
(void)enable;
return false;
}
static bool gfx_ctx_emscripten_has_windowed(void *data)
{
(void)data;
/* TODO -verify. */
return true;
}
static float gfx_ctx_emscripten_translate_aspect(void *data,
unsigned width, unsigned height)
{
(void)data;
return (float)width / height;
}
static bool gfx_ctx_emscripten_init_egl_image_buffer(void *data,
const video_info_t *video)
{
(void)data;
return false;
}
static bool gfx_ctx_emscripten_write_egl_image(void *data,
const void *frame, unsigned width, unsigned height, unsigned pitch,
bool rgb32, unsigned index, void **image_handle)
{
(void)data;
return false;
}
static gfx_ctx_proc_t gfx_ctx_emscripten_get_proc_address(const char *symbol)
{
#ifdef HAVE_EGL
return egl_get_proc_address(symbol);
#else
return NULL;
#endif
}
static void gfx_ctx_emscripten_bind_hw_render(void *data, bool enable)
{
emscripten_ctx_data_t *emscripten = (emscripten_ctx_data_t*)data;
#ifdef HAVE_EGL
egl_bind_hw_render(&emscripten->egl, enable);
#endif
}
static uint32_t gfx_ctx_emscripten_get_flags(void *data)
{
uint32_t flags = 0;
BIT32_SET(flags, GFX_CTX_FLAGS_NONE);
return flags;
}
static void gfx_ctx_emscripten_set_flags(void *data, uint32_t flags)
{
(void)data;
}
const gfx_ctx_driver_t gfx_ctx_emscripten = {
gfx_ctx_emscripten_init,
gfx_ctx_emscripten_destroy,
gfx_ctx_emscripten_bind_api,
gfx_ctx_emscripten_swap_interval,
gfx_ctx_emscripten_set_video_mode,
gfx_ctx_emscripten_get_video_size,
NULL, /* get_video_output_size */
NULL, /* get_video_output_prev */
NULL, /* get_video_output_next */
NULL, /* get_metrics */
gfx_ctx_emscripten_translate_aspect,
gfx_ctx_emscripten_update_window_title,
gfx_ctx_emscripten_check_window,
gfx_ctx_emscripten_set_resize,
gfx_ctx_emscripten_has_focus,
gfx_ctx_emscripten_suppress_screensaver,
gfx_ctx_emscripten_has_windowed,
gfx_ctx_emscripten_swap_buffers,
gfx_ctx_emscripten_input_driver,
gfx_ctx_emscripten_get_proc_address,
gfx_ctx_emscripten_init_egl_image_buffer,
gfx_ctx_emscripten_write_egl_image,
NULL,
"emscripten",
gfx_ctx_emscripten_get_flags,
gfx_ctx_emscripten_set_flags,
gfx_ctx_emscripten_bind_hw_render,
NULL,
NULL
};