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RetroArch/gfx/drivers_context/vc_egl_ctx.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2017 - Daniel De Matteis
* 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 <errno.h>
#include <signal.h>
#include <unistd.h>
#include <sched.h>
#include <VG/openvg.h>
#include <bcm_host.h>
#include <rthreads/rthreads.h>
#ifdef HAVE_CONFIG_H
#include "../../config.h"
#endif
#include <retro_inline.h>
#include "../../configuration.h"
#include "../video_driver.h"
#include "../../frontend/frontend_driver.h"
#ifdef HAVE_EGL
#include "../common/egl_common.h"
#endif
#if defined(HAVE_OPENGL) || defined(HAVE_OPENGLES)
#include "../common/gl_common.h"
#endif
#ifdef HAVE_EGL
#include <EGL/eglext_brcm.h>
#endif
#ifdef HAVE_CONFIG_H
#include "../../config.h"
#endif
typedef struct
{
bool smooth;
bool vsync_callback_set;
bool resize;
unsigned res;
unsigned fb_width, fb_height;
#ifdef HAVE_EGL
egl_ctx_data_t egl;
#endif
EGL_DISPMANX_WINDOW_T native_window;
DISPMANX_DISPLAY_HANDLE_T dispman_display;
/* For vsync wait after eglSwapBuffers when max_swapchain < 3 */
scond_t *vsync_condition;
slock_t *vsync_condition_mutex;
EGLImageKHR eglBuffer[MAX_EGLIMAGE_TEXTURES];
EGLContext eglimage_ctx;
EGLSurface pbuff_surf;
VGImage vgimage[MAX_EGLIMAGE_TEXTURES];
} vc_ctx_data_t;
static enum gfx_ctx_api vc_api = GFX_CTX_NONE;
static PFNEGLCREATEIMAGEKHRPROC peglCreateImageKHR;
static PFNEGLDESTROYIMAGEKHRPROC peglDestroyImageKHR;
static INLINE bool gfx_ctx_vc_egl_query_extension(vc_ctx_data_t *vc, const char *ext)
{
const char *str = (const char*)eglQueryString(vc->egl.dpy, EGL_EXTENSIONS);
bool ret = str && strstr(str, ext);
RARCH_LOG("Querying EGL extension: %s => %s\n",
ext, ret ? "exists" : "doesn't exist");
return ret;
}
static void gfx_ctx_vc_check_window(void *data, bool *quit,
bool *resize, unsigned *width, unsigned *height,
bool is_shutdown)
{
(void)data;
(void)width;
(void)height;
*resize = false;
*quit = (bool)frontend_driver_get_signal_handler_state();
}
static void gfx_ctx_vc_get_video_size(void *data,
unsigned *width, unsigned *height)
{
vc_ctx_data_t *vc = (vc_ctx_data_t*)data;
settings_t *settings = config_get_ptr();
/* Use dispmanx upscaling if
* fullscreen_x and fullscreen_y are set. */
if (settings->uints.video_fullscreen_x != 0 &&
settings->uints.video_fullscreen_y != 0)
{
/* Keep input and output aspect ratio equal.
* There are other aspect ratio settings
* which can be used to stretch video output. */
/* Calculate source and destination aspect ratios. */
float srcAspect = (float)settings->uints.video_fullscreen_x
/ (float)settings->uints.video_fullscreen_y;
float dstAspect = (float)vc->fb_width / (float)vc->fb_height;
/* If source and destination aspect ratios
* are not equal correct source width. */
if (srcAspect != dstAspect)
*width = (unsigned)(settings->uints.video_fullscreen_y * dstAspect);
else
*width = settings->uints.video_fullscreen_x;
*height = settings->uints.video_fullscreen_y;
}
else
{
*width = vc->fb_width;
*height = vc->fb_height;
}
}
static void dispmanx_vsync_callback(DISPMANX_UPDATE_HANDLE_T u, void *data)
{
vc_ctx_data_t *vc = (vc_ctx_data_t*)data;
if (!vc)
return;
slock_lock(vc->vsync_condition_mutex);
scond_signal(vc->vsync_condition);
slock_unlock(vc->vsync_condition_mutex);
}
static void gfx_ctx_vc_destroy(void *data);
static void *gfx_ctx_vc_init(video_frame_info_t *video_info, void *video_driver)
{
VC_DISPMANX_ALPHA_T alpha;
EGLint n, major, minor;
DISPMANX_ELEMENT_HANDLE_T dispman_element;
DISPMANX_DISPLAY_HANDLE_T dispman_display;
DISPMANX_UPDATE_HANDLE_T dispman_update;
DISPMANX_MODEINFO_T dispman_modeinfo;
VC_RECT_T dst_rect;
VC_RECT_T src_rect;
#ifdef HAVE_EGL
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
settings_t *settings = config_get_ptr();
vc_ctx_data_t *vc = NULL;
if (g_egl_inited)
{
RARCH_ERR("[VC/EGL]: Attempted to re-initialize driver.\n");
return NULL;
}
vc = (vc_ctx_data_t*)calloc(1, sizeof(*vc));
if (!vc)
return NULL;
/* If we set this env variable, Broadcom's EGL implementation will block
* on vsync with a double buffer when we call eglSwapBuffers. Less input lag!
* Has to be done before any EGL call.
* NOTE this is commented out because it should be the right way to do it, but
* currently it doesn't work, so we are using an vsync callback based solution.*/
/* if (video_info->max_swapchain_images <= 2)
setenv("V3D_DOUBLE_BUFFER", "1", 1);
else
setenv("V3D_DOUBLE_BUFFER", "0", 1); */
bcm_host_init();
#ifdef HAVE_EGL
if (!egl_init_context(&vc->egl, EGL_NONE, EGL_DEFAULT_DISPLAY,
&major, &minor, &n, attribute_list))
{
egl_report_error();
goto error;
}
if (!egl_create_context(&vc->egl, (vc_api == GFX_CTX_OPENGL_ES_API)
? context_attributes : NULL))
{
egl_report_error();
goto error;
}
#endif
/* Create an EGL window surface. */
if (graphics_get_display_size(0 /* LCD */, &vc->fb_width, &vc->fb_height) < 0)
goto error;
dst_rect.x = 0;
dst_rect.y = 0;
dst_rect.width = vc->fb_width;
dst_rect.height = vc->fb_height;
src_rect.x = 0;
src_rect.y = 0;
/* Use dispmanx upscaling if fullscreen_x
* and fullscreen_y are set. */
if ((settings->uints.video_fullscreen_x != 0) &&
(settings->uints.video_fullscreen_y != 0))
{
/* Keep input and output aspect ratio equal.
* There are other aspect ratio settings which can be used to stretch video output. */
/* Calculate source and destination aspect ratios. */
float srcAspect = (float)settings->uints.video_fullscreen_x / (float)settings->uints.video_fullscreen_y;
float dstAspect = (float)vc->fb_width / (float)vc->fb_height;
/* If source and destination aspect ratios are not equal correct source width. */
if (srcAspect != dstAspect)
src_rect.width = (unsigned)(settings->uints.video_fullscreen_y * dstAspect) << 16;
else
src_rect.width = settings->uints.video_fullscreen_x << 16;
src_rect.height = settings->uints.video_fullscreen_y << 16;
}
else
{
src_rect.width = vc->fb_width << 16;
src_rect.height = vc->fb_height << 16;
}
dispman_display = vc_dispmanx_display_open(0 /* LCD */);
vc->dispman_display = dispman_display;
vc_dispmanx_display_get_info(dispman_display, &dispman_modeinfo);
dispman_update = vc_dispmanx_update_start(0);
alpha.flags = DISPMANX_FLAGS_ALPHA_FIXED_ALL_PIXELS;
alpha.opacity = 255;
alpha.mask = 0;
dispman_element = vc_dispmanx_element_add(dispman_update, dispman_display,
0 /*layer*/, &dst_rect, 0 /*src*/,
&src_rect, DISPMANX_PROTECTION_NONE, &alpha, 0 /*clamp*/, DISPMANX_NO_ROTATE);
vc->native_window.element = dispman_element;
/* Use dispmanx upscaling if fullscreen_x and fullscreen_y are set. */
if (settings->uints.video_fullscreen_x != 0 &&
settings->uints.video_fullscreen_y != 0)
{
/* Keep input and output aspect ratio equal.
* There are other aspect ratio settings which
* can be used to stretch video output. */
/* Calculate source and destination aspect ratios. */
float srcAspect = (float)settings->uints.video_fullscreen_x
/ (float)settings->uints.video_fullscreen_y;
float dstAspect = (float)vc->fb_width / (float)vc->fb_height;
/* If source and destination aspect ratios are not equal correct source width. */
if (srcAspect != dstAspect)
vc->native_window.width = (unsigned)(settings->uints.video_fullscreen_y * dstAspect);
else
vc->native_window.width = settings->uints.video_fullscreen_x;
vc->native_window.height = settings->uints.video_fullscreen_y;
}
else
{
vc->native_window.width = vc->fb_width;
vc->native_window.height = vc->fb_height;
}
vc_dispmanx_update_submit_sync(dispman_update);
#ifdef HAVE_EGL
if (!egl_create_surface(&vc->egl, &vc->native_window))
goto error;
#endif
/* For vsync after eglSwapBuffers when max_swapchain < 3 */
vc->vsync_condition = scond_new();
vc->vsync_condition_mutex = slock_new();
vc->vsync_callback_set = false;
if (video_info->max_swapchain_images <= 2)
{
/* Start sending vsync callbacks so we can wait for vsync after eglSwapBuffers */
vc_dispmanx_vsync_callback(vc->dispman_display,
dispmanx_vsync_callback, (void*)vc);
vc->vsync_callback_set = true;
}
return vc;
error:
gfx_ctx_vc_destroy(video_driver);
return NULL;
}
static void gfx_ctx_vc_set_swap_interval(void *data, unsigned swap_interval)
{
#ifdef HAVE_EGL
vc_ctx_data_t *vc = (vc_ctx_data_t*)data;
if (vc)
egl_set_swap_interval(&vc->egl, swap_interval);
#endif
}
static bool gfx_ctx_vc_set_video_mode(void *data,
video_frame_info_t *video_info,
unsigned width, unsigned height,
bool fullscreen)
{
#ifdef HAVE_EGL
vc_ctx_data_t *vc = (vc_ctx_data_t*)data;
if (!vc || g_egl_inited)
return false;
frontend_driver_install_signal_handler();
gfx_ctx_vc_set_swap_interval(&vc->egl, vc->egl.interval);
g_egl_inited = true;
#endif
return true;
}
static enum gfx_ctx_api gfx_ctx_vc_get_api(void *data)
{
return vc_api;
}
static bool gfx_ctx_vc_bind_api(void *data,
enum gfx_ctx_api api, unsigned major, unsigned minor)
{
(void)data;
(void)major;
(void)minor;
vc_api = api;
switch (api)
{
case GFX_CTX_OPENGL_API:
return eglBindAPI(EGL_OPENGL_API);
case GFX_CTX_OPENGL_ES_API:
return eglBindAPI(EGL_OPENGL_ES_API);
case GFX_CTX_OPENVG_API:
return eglBindAPI(EGL_OPENVG_API);
default:
break;
}
return false;
}
static void gfx_ctx_vc_destroy(void *data)
{
vc_ctx_data_t *vc = (vc_ctx_data_t*)data;
unsigned i;
if (!vc)
{
g_egl_inited = false;
return;
}
if (vc->egl.dpy)
{
for (i = 0; i < MAX_EGLIMAGE_TEXTURES; i++)
{
if (vc->eglBuffer[i] && peglDestroyImageKHR)
{
eglBindAPI(EGL_OPENVG_API);
eglMakeCurrent(vc->egl.dpy,
vc->pbuff_surf, vc->pbuff_surf, vc->eglimage_ctx);
peglDestroyImageKHR(vc->egl.dpy, vc->eglBuffer[i]);
}
if (vc->vgimage[i])
{
eglBindAPI(EGL_OPENVG_API);
eglMakeCurrent(vc->egl.dpy,
vc->pbuff_surf, vc->pbuff_surf, vc->eglimage_ctx);
vgDestroyImage(vc->vgimage[i]);
}
}
if (vc->egl.ctx)
{
gfx_ctx_vc_bind_api(data, vc_api, 0, 0);
eglMakeCurrent(vc->egl.dpy,
EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroyContext(vc->egl.dpy, vc->egl.ctx);
}
if (vc->egl.hw_ctx)
eglDestroyContext(vc->egl.dpy, vc->egl.hw_ctx);
if (vc->eglimage_ctx)
{
eglBindAPI(EGL_OPENVG_API);
eglMakeCurrent(vc->egl.dpy,
EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroyContext(vc->egl.dpy, vc->eglimage_ctx);
}
if (vc->egl.surf)
{
gfx_ctx_vc_bind_api(data, vc_api, 0, 0);
eglDestroySurface(vc->egl.dpy, vc->egl.surf);
}
if (vc->pbuff_surf)
{
eglBindAPI(EGL_OPENVG_API);
eglDestroySurface(vc->egl.dpy, vc->pbuff_surf);
}
eglBindAPI(EGL_OPENVG_API);
eglMakeCurrent(vc->egl.dpy,
EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
gfx_ctx_vc_bind_api(data, vc_api, 0, 0);
eglMakeCurrent(vc->egl.dpy,
EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglTerminate(vc->egl.dpy);
}
vc->egl.ctx = NULL;
vc->egl.hw_ctx = NULL;
vc->eglimage_ctx = NULL;
vc->egl.surf = NULL;
vc->pbuff_surf = NULL;
vc->egl.dpy = NULL;
vc->egl.config = 0;
g_egl_inited = false;
for (i = 0; i < MAX_EGLIMAGE_TEXTURES; i++)
{
vc->eglBuffer[i] = NULL;
vc->vgimage[i] = 0;
}
/* Stop generating vsync callbacks if we are doing so.
* Don't destroy the context while cbs are being generated! */
if (vc->vsync_callback_set)
vc_dispmanx_vsync_callback(vc->dispman_display, NULL, NULL);
/* Destroy mutexes and conditions. */
slock_free(vc->vsync_condition_mutex);
scond_free(vc->vsync_condition);
}
static void gfx_ctx_vc_input_driver(void *data,
const char *name,
const input_driver_t **input, void **input_data)
{
*input = NULL;
*input_data = NULL;
}
static bool gfx_ctx_vc_has_focus(void *data)
{
(void)data;
return g_egl_inited;
}
static bool gfx_ctx_vc_suppress_screensaver(void *data, bool enable)
{
(void)data;
(void)enable;
return false;
}
static float gfx_ctx_vc_translate_aspect(void *data,
unsigned width, unsigned height)
{
(void)data;
/* Check for SD televisions: they should always be 4:3. */
if ((width == 640 || width == 720) && (height == 480 || height == 576))
return 4.0f / 3.0f;
return (float)width / height;
}
static bool gfx_ctx_vc_image_buffer_init(void *data,
const video_info_t *video)
{
EGLBoolean result;
vc_ctx_data_t *vc = (vc_ctx_data_t*)data;
EGLint pbufsurface_list[] =
{
EGL_WIDTH, vc->res,
EGL_HEIGHT, vc->res,
EGL_NONE
};
/* Don't bother, we just use VGImages for our EGLImage anyway. */
if (vc_api == GFX_CTX_OPENVG_API)
return false;
peglCreateImageKHR = (PFNEGLCREATEIMAGEKHRPROC)egl_get_proc_address("eglCreateImageKHR");
peglDestroyImageKHR = (PFNEGLDESTROYIMAGEKHRPROC)egl_get_proc_address("eglDestroyImageKHR");
if ( !peglCreateImageKHR ||
!peglDestroyImageKHR ||
!gfx_ctx_vc_egl_query_extension(vc, "KHR_image")
)
return false;
vc->res = video->input_scale * RARCH_SCALE_BASE;
eglBindAPI(EGL_OPENVG_API);
vc->pbuff_surf = eglCreatePbufferSurface(vc->egl.dpy, vc->egl.config, pbufsurface_list);
if (vc->pbuff_surf == EGL_NO_SURFACE)
{
RARCH_ERR("[VideoCore:EGLImage] failed to create PbufferSurface\n");
goto fail;
}
vc->eglimage_ctx = eglCreateContext(vc->egl.dpy, vc->egl.config, NULL, NULL);
if (vc->eglimage_ctx == EGL_NO_CONTEXT)
{
RARCH_ERR("[VideoCore:EGLImage] failed to create context\n");
goto fail;
}
/* Test to make sure we can switch context. */
result = eglMakeCurrent(vc->egl.dpy, vc->pbuff_surf, vc->pbuff_surf, vc->eglimage_ctx);
if (result == EGL_FALSE)
{
RARCH_ERR("[VideoCore:EGLImage] failed to make context current\n");
goto fail;
}
gfx_ctx_vc_bind_api(NULL, vc_api, 0, 0);
eglMakeCurrent(vc->egl.dpy, vc->egl.surf, vc->egl.surf, vc->egl.ctx);
vc->smooth = video->smooth;
return true;
fail:
if (vc->pbuff_surf != EGL_NO_SURFACE)
{
eglDestroySurface(vc->egl.dpy, vc->pbuff_surf);
vc->pbuff_surf = EGL_NO_SURFACE;
}
if (vc->eglimage_ctx != EGL_NO_CONTEXT)
{
eglDestroyContext(vc->egl.dpy, vc->eglimage_ctx);
vc->pbuff_surf = EGL_NO_CONTEXT;
}
gfx_ctx_vc_bind_api(NULL, vc_api, 0, 0);
eglMakeCurrent(vc->egl.dpy, vc->egl.surf, vc->egl.surf, vc->egl.ctx);
return false;
}
static bool gfx_ctx_vc_image_buffer_write(void *data, const void *frame, unsigned width,
unsigned height, unsigned pitch, bool rgb32, unsigned index, void **image_handle)
{
bool ret = false;
vc_ctx_data_t *vc = (vc_ctx_data_t*)data;
if (!vc || index >= MAX_EGLIMAGE_TEXTURES)
goto error;
eglBindAPI(EGL_OPENVG_API);
eglMakeCurrent(vc->egl.dpy, vc->pbuff_surf, vc->pbuff_surf, vc->eglimage_ctx);
if (!vc->eglBuffer[index] || !vc->vgimage[index])
{
vc->vgimage[index] = vgCreateImage(
rgb32 ? VG_sXRGB_8888 : VG_sRGB_565,
vc->res,
vc->res,
VG_IMAGE_QUALITY_NONANTIALIASED);
vc->eglBuffer[index] = peglCreateImageKHR(
vc->egl.dpy,
vc->eglimage_ctx,
EGL_VG_PARENT_IMAGE_KHR,
(EGLClientBuffer)vc->vgimage[index],
NULL);
ret = true;
}
vgImageSubData(
vc->vgimage[index],
frame, pitch,
(rgb32 ? VG_sXRGB_8888 : VG_sRGB_565),
0,
0,
width,
height);
*image_handle = vc->eglBuffer[index];
gfx_ctx_vc_bind_api(NULL, vc_api, 0, 0);
eglMakeCurrent(vc->egl.dpy, vc->egl.surf, vc->egl.surf, vc->egl.ctx);
return ret;
error:
*image_handle = NULL;
return false;
}
static void gfx_ctx_vc_swap_buffers(void *data, void *data2)
{
#ifdef HAVE_EGL
vc_ctx_data_t *vc = (vc_ctx_data_t*)data;
video_frame_info_t *video_info = (video_frame_info_t*)data2;
if (!vc)
return;
egl_swap_buffers(&vc->egl);
/* Wait for vsync immediately if we don't
* want egl_swap_buffers to triple-buffer */
if (video_info->max_swapchain_images <= 2)
{
/* We DON'T wait to wait without callback function ready! */
if (!vc->vsync_callback_set)
{
vc_dispmanx_vsync_callback(vc->dispman_display,
dispmanx_vsync_callback, (void*)vc);
vc->vsync_callback_set = true;
}
slock_lock(vc->vsync_condition_mutex);
scond_wait(vc->vsync_condition, vc->vsync_condition_mutex);
slock_unlock(vc->vsync_condition_mutex);
}
/* Stop generating vsync callbacks from now on */
else if (vc->vsync_callback_set)
vc_dispmanx_vsync_callback(vc->dispman_display, NULL, NULL);
#endif
}
static void gfx_ctx_vc_bind_hw_render(void *data, bool enable)
{
vc_ctx_data_t *vc = (vc_ctx_data_t*)data;
if (!vc)
return;
#ifdef HAVE_EGL
egl_bind_hw_render(&vc->egl, enable);
#endif
}
static gfx_ctx_proc_t gfx_ctx_vc_get_proc_address(const char *symbol)
{
#ifdef HAVE_EGL
return egl_get_proc_address(symbol);
#else
return NULL;
#endif
}
static uint32_t gfx_ctx_vc_get_flags(void *data)
{
uint32_t flags = 0;
BIT32_SET(flags, GFX_CTX_FLAGS_CUSTOMIZABLE_SWAPCHAIN_IMAGES);
return flags;
}
static void gfx_ctx_vc_set_flags(void *data, uint32_t flags)
{
(void)data;
}
const gfx_ctx_driver_t gfx_ctx_videocore = {
gfx_ctx_vc_init,
gfx_ctx_vc_destroy,
gfx_ctx_vc_get_api,
gfx_ctx_vc_bind_api,
gfx_ctx_vc_set_swap_interval,
gfx_ctx_vc_set_video_mode,
gfx_ctx_vc_get_video_size,
NULL, /* get_refresh_rate */
NULL, /* get_video_output_size */
NULL, /* get_video_output_prev */
NULL, /* get_video_output_next */
NULL, /* get_metrics */
gfx_ctx_vc_translate_aspect,
NULL, /* update_title */
gfx_ctx_vc_check_window,
NULL, /* set_resize */
gfx_ctx_vc_has_focus,
gfx_ctx_vc_suppress_screensaver,
NULL, /* has_windowed */
gfx_ctx_vc_swap_buffers,
gfx_ctx_vc_input_driver,
gfx_ctx_vc_get_proc_address,
gfx_ctx_vc_image_buffer_init,
gfx_ctx_vc_image_buffer_write,
NULL,
"videocore",
gfx_ctx_vc_get_flags,
gfx_ctx_vc_set_flags,
gfx_ctx_vc_bind_hw_render,
NULL,
NULL
};
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