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RetroArch/gfx/drivers/drm_gfx.c
twinaphex 54e137d9f7 Cleanups
2016-07-03 10:47:09 +02:00

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/* RetroArch - A frontend for libretro.
* Plain DRM diver: Copyright (C) 2016 - Manuel Alfayate
*
* 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 <xf86drm.h>
#include <xf86drmMode.h>
#include <libdrm/drm_fourcc.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <errno.h>
#include <rthreads/rthreads.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "../../driver.h"
#include "../../general.h"
#include "../../retroarch.h"
#include "../video_context_driver.h"
#include "../font_driver.h"
#include "drm_pixformats.h"
struct modeset_buf
{
uint32_t width;
uint32_t height;
uint32_t stride;
uint32_t size;
uint32_t handle;
uint8_t *map;
uint32_t fb_id;
uint32_t pixel_format;
};
struct drm_rect
{
int x;
int y;
int width;
int height;
};
/* Pages are abstractions of buffers, encapsulated together with more
data for multiple buffering: to know if it's used, etc.
Hence, each page will have ONE buffer. No more, no less.*/
struct drm_page
{
struct modeset_buf buf;
bool used;
/* Each page has it's own mutex for
* isolating it's used flag access. */
slock_t *page_used_mutex;
/* This field will allow us to access the
* main _dispvars struct from the vsync CB function */
struct drm_video *drmvars;
/* This field will allow us to access the
* surface the page belongs to. */
struct drm_surface *surface;
};
/* One surface for main game, another for menu. */
struct drm_surface
{
/* main surface has 3 pages, menu surface has 1 */
unsigned int numpages;
struct drm_page *pages;
/* the page that's currently on screen */
struct drm_page *current_page;
unsigned int bpp;
uint32_t pixformat;
/* The internal buffers size. */
int src_width;
int src_height;
/* Surfaces with a higher layer will be on top of
* the ones with lower. Default is 0. */
int layer;
/* We need to keep this value for the blitting on
* the surface_update function. */
int pitch;
int total_pitch;
float aspect;
bool flip_page;
};
struct drm_struct
{
/* DRM connection, mode and plane management stuff */
int fd;
drmModeModeInfo *current_mode;
uint32_t crtc_id;
uint32_t connector_id;
drmModeCrtcPtr orig_crtc;
uint32_t plane_id;
uint32_t plane_fb_prop_id;
drmModeEncoder *encoder;
drmModeRes *resources;
} drm;
struct drm_video
{
/* Abstract surface management stuff */
struct drm_surface *main_surface;
struct drm_surface *menu_surface;
/* Total dispmanx video dimensions.
* Not counting overscan settings. */
unsigned int kms_width;
unsigned int kms_height;
/* For threading */
scond_t *vsync_condition;
slock_t *vsync_cond_mutex;
slock_t *pending_mutex;
/* Menu */
bool menu_active;
bool rgb32;
/* We use this to keep track of internal resolution changes
* done by cores in the main surface or in the menu.
* We need these outside the surface because we free surfaces
* and then we want to test if these values have changed before
* recreating them. */
int core_width;
int core_height;
int core_pitch;
/* Both main and menu surfaces are going to have the same aspect,
* so we keep it here for future reference. */
float current_aspect;
};
/* Some prototypes for later use */
static int modeset_create_dumbfb(int fd,
struct modeset_buf *buf, int bpp, uint32_t pixformat);
static void deinit_drm(void)
{
/* Restore the original videomode/connector/scanoutbuffer(fb)
* combination (the original CRTC, that is). */
drmModeSetCrtc(drm.fd, drm.orig_crtc->crtc_id,
drm.orig_crtc->buffer_id,
drm.orig_crtc->x, drm.orig_crtc->y,
&drm.connector_id, 1, &drm.orig_crtc->mode);
#if 0
/* TODO: Free surfaces here along
* with their pages (framebuffers)! */
if (bufs[0].fb_id)
{
drmModeRmFB(drm.fd, bufs[0].fb_id);
drmModeRmFB(drm.fd, bufs[1].fb_id);
}
#endif
}
static void drm_surface_free(void *data, struct drm_surface **sp)
{
int i;
struct drm_video *_drmvars = data;
struct drm_surface *surface = *sp;
for (i = 0; i < surface->numpages; i++)
surface->pages[i].used = false;
free(surface->pages);
free(surface);
*sp = NULL;
}
/* Changes surface ratio only without recreating the buffers etc. */
static void drm_surface_set_aspect(struct drm_surface *surface, float aspect)
{
surface->aspect = aspect;
}
static void drm_surface_setup(void *data, int src_width, int src_height,
int pitch, int bpp, uint32_t pixformat,
int alpha, float aspect, int numpages, int layer,
struct drm_surface **sp)
{
struct drm_video *_drmvars = data;
int i;
struct drm_surface *surface = NULL;
*sp = calloc (1, sizeof(struct drm_surface));
surface = *sp;
/* Setup surface parameters */
surface->numpages = numpages;
/* We receive the total pitch, including things that are
* between scanlines and we calculate the visible pitch
* from the visible width.
*
* These will be used to increase the offsets for blitting. */
surface->total_pitch = pitch;
surface->pitch = src_width * bpp;
surface->bpp = bpp;
surface->pixformat = pixformat;
surface->src_width = src_width;
surface->src_height = src_height;
surface->aspect = aspect;
/* Allocate memory for all the pages in each surface
* and initialize variables inside each page's struct. */
surface->pages = (struct drm_page*)
calloc(surface->numpages, sizeof(struct drm_page));
for (i = 0; i < surface->numpages; i++)
{
surface->pages[i].used = false;
surface->pages[i].surface = surface;
surface->pages[i].drmvars = _drmvars;
surface->pages[i].page_used_mutex = slock_new();
}
/* Create the framebuffer for each one of the pages of the surface. */
for (i = 0; i < surface->numpages; i++)
{
surface->pages[i].buf.width = src_width;
surface->pages[i].buf.height = src_height;
int ret = modeset_create_dumbfb(
drm.fd, &surface->pages[i].buf, bpp, pixformat);
if (ret)
{
RARCH_ERR ("DRM: can't create fb\n");
}
}
surface->flip_page = 0;
}
static void drm_page_flip(struct drm_surface *surface)
{
/* We alredy have the id of the FB_ID property of
* the plane on which we are going to do a pageflip:
* we got it back in drm_plane_setup() */
int ret;
static drmModeAtomicReqPtr req = NULL;
req = drmModeAtomicAlloc();
/* We add the buffer to the plane properties we want to
* set on an atomically, in a single step.
* We pass the plane id, the property id and the new fb id. */
ret = drmModeAtomicAddProperty(req,
drm.plane_id,
drm.plane_fb_prop_id,
surface->pages[surface->flip_page].buf.fb_id);
if (ret < 0)
{
RARCH_ERR ("DRM: failed to add atomic property for pageflip\n");
}
/*... now we just need to do the commit */
/* REMEMBER!!! The DRM_MODE_PAGE_FLIP_EVENT flag asks the kernel
* to send you an event to the drm.fd once the
* pageflip is complete. If you don't want -12 errors
* (ENOMEM), namely "Cannot allocate memory", then
* you must drain the event queue of that fd. */
ret = drmModeAtomicCommit(drm.fd, req, 0, NULL);
if (ret < 0)
{
RARCH_ERR ("DRM: failed to commit for pageflip: %s\n", strerror(errno));
}
surface->flip_page = !(surface->flip_page);
drmModeAtomicFree(req);
}
static void drm_surface_update(void *data, const void *frame,
struct drm_surface *surface)
{
struct drm_video *_drmvars = data;
struct drm_page *page = NULL;
/* Frame blitting */
int line = 0;
int src_offset = 0;
int dst_offset = 0;
for (line = 0; line < surface->src_height; line++)
{
memcpy (
surface->pages[surface->flip_page].buf.map + dst_offset,
(uint8_t*)frame + src_offset,
surface->pitch);
src_offset += surface->total_pitch;
dst_offset += surface->pitch;
}
/* Page flipping */
drm_page_flip(surface);
}
static uint32_t get_plane_prop_id(uint32_t obj_id, const char *name)
{
int i,j;
drmModePlaneRes *plane_resources;
drmModePlane *plane;
drmModeObjectProperties *props;
drmModePropertyRes **props_info;
char format_str[5];
plane_resources = drmModeGetPlaneResources(drm.fd);
for (i = 0; i < plane_resources->count_planes; i++)
{
plane = drmModeGetPlane(drm.fd, plane_resources->planes[i]);
if (plane->plane_id != obj_id)
continue;
/* TODO: Improvement. We get all the properties of the
* plane and info about the properties.
* We should have done this already...
* This implementation must be improved. */
props = drmModeObjectGetProperties(drm.fd,
plane->plane_id, DRM_MODE_OBJECT_PLANE);
props_info = malloc(props->count_props * sizeof *props_info);
for (j = 0; j < props->count_props; ++j)
props_info[j] = drmModeGetProperty(drm.fd, props->props[j]);
/* We look for the prop_id we need */
for (j = 0; j < props->count_props; j++)
{
if (!strcmp(props_info[j]->name, name))
return props_info[j]->prop_id;
}
RARCH_ERR ("DRM: plane %d fb property ID with name %s not found\n",
plane->plane_id, name);
}
return (0);
}
/* gets fourcc, returns name string. */
static void drm_format_name(const unsigned int fourcc, char *format_str)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(format_info); i++)
{
if (format_info[i].format == fourcc)
strcpy(format_str, format_info[i].name);
}
}
/* Will tell us if the supplied plane supports the supplied pix format. */
static bool format_support(const drmModePlanePtr ovr, uint32_t fmt)
{
unsigned int i;
for (i = 0; i < ovr->count_formats; ++i)
{
if (ovr->formats[i] == fmt)
return true;
}
return false;
}
static uint64_t drm_plane_type(drmModePlane *plane)
{
int i,j;
/* The property values and their names are stored in different arrays, so we
* access them simultaneously here.
* We are interested in OVERLAY planes only, that's type 0 or DRM_PLANE_TYPE_OVERLAY
* (see /usr/xf86drmMode.h for definition). */
drmModeObjectPropertiesPtr props =
drmModeObjectGetProperties(drm.fd, plane->plane_id, DRM_MODE_OBJECT_PLANE);
for (j = 0; j < props->count_props; j++)
{
/* found the type property */
if ( !strcmp(drmModeGetProperty(drm.fd, props->props[j])->name, "type"))
return (props->prop_values[j]);
}
return (0);
}
/* This configures our only overlay plane to render the given surface. */
static void drm_plane_setup(struct drm_surface *surface)
{
int i,j;
char fmt_name[5];
/* Get plane resources */
drmModePlane *plane;
drmModePlaneRes *plane_resources;
plane_resources = drmModeGetPlaneResources(drm.fd);
if (!plane_resources)
{
RARCH_ERR ("DRM: No scaling planes available!\n");
}
RARCH_LOG ("DRM: Number of planes on FD %d is %d\n",
drm.fd, plane_resources->count_planes);
/* dump_planes(drm.fd); */
/* Look for a plane/overlay we can use with the configured CRTC
* Find a plane which can be connected to our CRTC. Find the
* CRTC index first, then iterate over available planes.
* Yes, strangely we need the in-use CRTC index to mask possible_crtc
* during the planes iteration... */
unsigned int crtc_index = 0;
for (i = 0; i < (unsigned int)drm.resources->count_crtcs; i++)
{
if (drm.crtc_id == drm.resources->crtcs[i])
{
crtc_index = i;
RARCH_LOG ("DRM: CRTC index found %d with ID %d\n", crtc_index, drm.crtc_id);
break;
}
}
/* Programmer!! Save your sanity!! Primary planes have to
* cover the entire CRTC, and if you don't do that, you
* will get dmesg error "Plane must cover entire CRTC".
*
* Look at linux/source/drivers/gpu/drm/drm_plane_helper.c comments for more info.
* Also, primary planes can't be scaled: we need overlays for that. */
for (i = 0; i < plane_resources->count_planes; i++)
{
plane = drmModeGetPlane(drm.fd, plane_resources->planes[i]);
if (!(plane->possible_crtcs & (1 << crtc_index))){
RARCH_LOG ("DRM: plane with ID %d can't be used with current CRTC\n",
plane->plane_id);
continue;
}
/* We are only interested in overlay planes. No overlay, no fun.
* (no scaling, must cover crtc..etc) so we skip primary planes */
if (drm_plane_type(plane) != DRM_PLANE_TYPE_OVERLAY)
{
RARCH_LOG ("DRM: plane with ID %d is not an overlay. May be primary or cursor. Not usable.\n",
plane->plane_id);
continue;
}
if (!format_support(plane, surface->pixformat))
{
RARCH_LOG ("DRM: plane with ID %d does not support framebuffer format\n", plane->plane_id);
continue;
}
drm.plane_id = plane->plane_id;
drmModeFreePlane(plane);
}
if (!drm.plane_id)
{
RARCH_LOG ("DRM: couldn't find an usable overlay plane for current CRTC and framebuffer pixel formal.\n");
deinit_drm();
exit (0);
}
else
{
RARCH_LOG ("DRM: using plane/overlay ID %d\n", drm.plane_id);
}
/* We are going to be changing the framebuffer ID property of the chosen overlay every time
* we do a pageflip, so we get the property ID here to have it handy on the PageFlip function. */
drm.plane_fb_prop_id = get_plane_prop_id(drm.plane_id, "FB_ID");
if (!drm.plane_fb_prop_id)
{
RARCH_LOG("DRM: Can't get the FB property ID for plane(%u)\n", drm.plane_id);
}
/* Note src coords (last 4 args) are in Q16 format
* crtc_w and crtc_h are the final size with applied scale/ratio.
* crtc_x and crtc_y are the position of the plane
* pw and ph are the input size: the size of the area we read from the fb. */
uint32_t plane_flags = 0;
uint32_t plane_w = drm.current_mode->vdisplay * surface->aspect;;
uint32_t plane_h = drm.current_mode->vdisplay;
/* If we obtain a scaled image width that is bigger than the physical screen width,
* then we keep the physical screen width as our maximun width. */
if (plane_w > drm.current_mode->hdisplay)
plane_w = drm.current_mode->hdisplay;
uint32_t plane_x = (drm.current_mode->hdisplay - plane_w) / 2;
uint32_t plane_y = (drm.current_mode->vdisplay - plane_h) / 2;
uint32_t src_w = surface->src_width;
uint32_t src_h = surface->src_height;
uint32_t src_x = 0;
uint32_t src_y = 0;
/* We have to set a buffer for the plane, whatever buffer we want,
* but we must set a buffer so the plane starts reading from it now. */
if (drmModeSetPlane(drm.fd, drm.plane_id, drm.crtc_id,
surface->pages[surface->flip_page].buf.fb_id,
plane_flags, plane_x, plane_y, plane_w, plane_h,
src_x<<16, src_y<<16, src_w<<16, src_h<<16))
{
RARCH_ERR("DRM: failed to enable plane: %s\n", strerror(errno));
}
RARCH_LOG("DRM: src_w %d, src_h %d, plane_w %d, plane_h %d\n",
src_w, src_h, plane_w, plane_h);
/* Report what plane (of overlay type) we're using. */
drm_format_name(surface->pixformat, fmt_name);
RARCH_LOG("DRM: Using plane with ID %d on CRTC ID %d format %s\n",
drm.plane_id, drm.crtc_id, fmt_name);
}
static int modeset_create_dumbfb(int fd, struct modeset_buf *buf,
int bpp, uint32_t pixformat)
{
struct drm_mode_create_dumb create_dumb = {0};
struct drm_mode_map_dumb map_dumb = {0};
struct drm_mode_fb_cmd cmd_dumb = {0};
create_dumb.width = buf->width;
create_dumb.height = buf->height;
create_dumb.bpp = bpp * 8;
create_dumb.flags = 0;
create_dumb.pitch = 0;
create_dumb.size = 0;
create_dumb.handle = 0;
drmIoctl(drm.fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
/* Create the buffer. We just copy values here... */
cmd_dumb.width = create_dumb.width;
cmd_dumb.height = create_dumb.height;
cmd_dumb.bpp = create_dumb.bpp;
cmd_dumb.pitch = create_dumb.pitch;
cmd_dumb.handle = create_dumb.handle;
cmd_dumb.depth = 24;
/* Map the buffer */
drmIoctl(drm.fd,DRM_IOCTL_MODE_ADDFB,&cmd_dumb);
map_dumb.handle=create_dumb.handle;
drmIoctl(drm.fd,DRM_IOCTL_MODE_MAP_DUMB,&map_dumb);
buf->pixel_format = pixformat;
buf->fb_id = cmd_dumb.fb_id;
buf->stride = create_dumb.pitch;
buf->size = create_dumb.size;
buf->handle = create_dumb.handle;
/* Get address */
buf->map = mmap(0, buf->size, PROT_READ | PROT_WRITE, MAP_SHARED,
fd, map_dumb.offset);
if (buf->map == MAP_FAILED)
{
RARCH_ERR ("DRM: cannot mmap dumb buffer\n");
return 0;
}
return 0;
}
static bool init_drm(void)
{
int ret;
drmModeConnector *connector;
uint i;
drm.fd = open("/dev/dri/card0", O_RDWR);
if (drm.fd < 0)
{
RARCH_LOG ("DRM: could not open drm device\n");
return false;
}
/* Programmer!! Save your sanity!!
* VERY important or we won't get all the available planes on drmGetPlaneResources()!
* We also need to enable the ATOMIC cap to see the atomic properties in objects!! */
ret = drmSetClientCap(drm.fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
if (ret)
RARCH_ERR ("DRM: can't set UNIVERSAL PLANES cap.\n");
else
RARCH_LOG ("DRM: UNIVERSAL PLANES cap set\n");
ret = drmSetClientCap(drm.fd, DRM_CLIENT_CAP_ATOMIC, 1);
if (ret)
{
/*If this happens, check kernel support and kernel parameters
* (add i915.nuclear_pageflip=y to the kernel boot line for example) */
RARCH_ERR ("DRM: can't set ATOMIC caps: %s\n", strerror(errno));
}
else
RARCH_LOG ("DRM: ATOMIC caps set\n");
drm.resources = drmModeGetResources(drm.fd);
if (!drm.resources)
{
RARCH_ERR ("DRM: drmModeGetResources failed\n");
return false;
}
/* Find a connected connector. */
for (i = 0; i < (uint)drm.resources->count_connectors; i++)
{
connector = drmModeGetConnector(drm.fd, drm.resources->connectors[i]);
/* It's connected, let's use it. */
if (connector->connection == DRM_MODE_CONNECTED)
break;
drmModeFreeConnector(connector);
connector = NULL;
}
if (!connector)
{
RARCH_ERR ("DRM: no connected connector found\n");
return false;
}
/* Find encoder */
for (i = 0; i < (uint)drm.resources->count_encoders; i++)
{
drm.encoder = drmModeGetEncoder(drm.fd, drm.resources->encoders[i]);
if (drm.encoder->encoder_id == connector->encoder_id)
break;
drmModeFreeEncoder(drm.encoder);
drm.encoder = NULL;
}
if (!drm.encoder)
{
RARCH_ERR ("DRM: no encoder found.\n");
return false;
}
drm.crtc_id = drm.encoder->crtc_id;
drm.connector_id = connector->connector_id;
/* Backup original crtc and it's mode, so we can restore the original video mode
* on exit in case we change it. */
drm.orig_crtc = drmModeGetCrtc(drm.fd, drm.encoder->crtc_id);
drm.current_mode = &(drm.orig_crtc->mode);
/* Set mode physical video mode. Not really needed, but clears TTY console. */
struct modeset_buf buf;
buf.width = drm.current_mode->hdisplay;
buf.height = drm.current_mode->vdisplay;
ret = modeset_create_dumbfb(drm.fd, &buf, 4, DRM_FORMAT_XRGB8888);
if (ret)
{
RARCH_ERR ("DRM: can't create dumb fb\n");
}
if (drmModeSetCrtc(drm.fd, drm.crtc_id, buf.fb_id, 0, 0,
&drm.connector_id, 1, drm.current_mode))
{
RARCH_ERR ("DRM: failed to set mode\n");
return false;
}
return true;
}
static void *drm_gfx_init(const video_info_t *video,
const input_driver_t **input, void **input_data)
{
struct drm_video *_drmvars = (struct drm_video*)
calloc(1, sizeof(struct drm_video));
if (!_drmvars)
return NULL;
/* Setup surface parameters */
_drmvars->menu_active = false;
_drmvars->rgb32 = video->rgb32;
/* It's very important that we set aspect here because the
* call seq when a core is loaded is gfx_init()->set_aspect()->gfx_frame()
* and we don't want the main surface to be setup in set_aspect()
* before we get to gfx_frame(). */
_drmvars->current_aspect = video_driver_get_aspect_ratio();
/* Initialize the rest of the mutexes and conditions. */
_drmvars->vsync_condition = scond_new();
_drmvars->vsync_cond_mutex = slock_new();
_drmvars->pending_mutex = slock_new();
_drmvars->core_width = 0;
_drmvars->core_height = 0;
_drmvars->main_surface = NULL;
_drmvars->menu_surface = NULL;
if (input && input_data)
*input = NULL;
/* DRM Init */
if (!init_drm())
{
RARCH_ERR ("DRM: Failed to initialize DRM\n");
return NULL;
}
else
RARCH_LOG ("DRM: Init succesful.\n");
_drmvars->kms_width = drm.current_mode->hdisplay;
_drmvars->kms_height = drm.current_mode->vdisplay;
return _drmvars;
}
static bool drm_gfx_frame(void *data, const void *frame, unsigned width,
unsigned height, uint64_t frame_count, unsigned pitch, const char *msg)
{
struct drm_video *_drmvars = data;
if (width != _drmvars->core_width || height != _drmvars->core_height)
{
/* Sanity check. */
if (width == 0 || height == 0)
return true;
_drmvars->core_width = width;
_drmvars->core_height = height;
_drmvars->core_pitch = pitch;
if (_drmvars->main_surface != NULL)
drm_surface_free(_drmvars, &_drmvars->main_surface);
/* We need to recreate the main surface and it's pages (buffers). */
drm_surface_setup(_drmvars,
width,
height,
pitch,
_drmvars->rgb32 ? 4 : 2,
_drmvars->rgb32 ? DRM_FORMAT_XRGB8888 : DRM_FORMAT_RGB565,
255,
_drmvars->current_aspect,
3,
0,
&_drmvars->main_surface);
/* We need to change the plane to read from the main surface */
drm_plane_setup(_drmvars->main_surface);
}
if (_drmvars->menu_active)
{
char buf[128];
video_monitor_get_fps(buf, sizeof(buf), NULL, 0);
}
/* Update main surface: locate free page, blit and flip. */
drm_surface_update(_drmvars, frame, _drmvars->main_surface);
return true;
}
static void drm_set_texture_enable(void *data, bool state, bool full_screen)
{
struct drm_video *_drmvars = data;
/* If menu was active but it's not anymore... */
if (!state && _drmvars->menu_active)
{
/* We tell ony the plane we have to read from the main surface again */
drm_plane_setup(_drmvars->main_surface);
/* We free the menu surface buffers */
drm_surface_free(_drmvars, &_drmvars->menu_surface);
}
_drmvars->menu_active = state;
}
static void drm_set_texture_frame(void *data, const void *frame, bool rgb32,
unsigned width, unsigned height, float alpha)
{
unsigned int i, j;
struct drm_video *_drmvars = data;
if (!_drmvars->menu_active)
return;
/* If menu is active in this frame but the
* menu surface is NULL, we allocate a new one.*/
if (!_drmvars->menu_surface)
{
drm_surface_setup(_drmvars,
width,
height,
width * 4,
4,
DRM_FORMAT_XRGB8888,
210,
_drmvars->current_aspect,
2,
0,
&_drmvars->menu_surface);
/* We need to re-setup the ONLY plane as the setup
* depends on input buffers dimensions. */
drm_plane_setup(_drmvars->menu_surface);
}
/* We have to go on a pixel format conversion adventure
* for now, until we can convince RGUI to output
* in an 8888 format. */
unsigned int src_pitch = width * 2;
unsigned int dst_pitch = width * 4;
unsigned int dst_width = width;
uint32_t line[dst_width];
/* The output pixel array with the converted pixels. */
char *frame_output = (char *) malloc (dst_pitch * height);
/* Remember, memcpy() works with 8bits pointers for increments. */
char *dst_base_addr = frame_output;
for (i = 0; i < height; i++)
{
for (j = 0; j < src_pitch / 2; j++)
{
uint16_t src_pix = *((uint16_t*)frame + (src_pitch / 2 * i) + j);
/* The hex AND is for keeping only the part we need for each component. */
uint32_t R = (src_pix << 8) & 0x00FF0000;
uint32_t G = (src_pix << 4) & 0x0000FF00;
uint32_t B = (src_pix << 0) & 0x000000FF;
line[j] = (0 | R | G | B);
}
memcpy(dst_base_addr + (dst_pitch * i), (char*)line, dst_pitch);
}
/* We update the menu surface if menu is active. */
drm_surface_update(_drmvars, frame_output, _drmvars->menu_surface);
}
static void drm_gfx_set_nonblock_state(void *data, bool state)
{
struct drm_video *vid = data;
(void)data;
(void)vid;
/* TODO */
}
static bool drm_gfx_alive(void *data)
{
(void)data;
return true; /* always alive */
}
static bool drm_gfx_focus(void *data)
{
(void)data;
return true; /* fb device always has focus */
}
static void drm_gfx_viewport_info(void *data, struct video_viewport *vp)
{
struct drm_video *vid = data;
if (!vid)
return;
vp->x = vp->y = 0;
vp->width = vp->full_width = vid->core_width;
vp->height = vp->full_height = vid->core_height;
}
static bool drm_gfx_suppress_screensaver(void *data, bool enable)
{
(void)data;
(void)enable;
return false;
}
static bool drm_gfx_has_windowed(void *data)
{
(void)data;
return false;
}
static bool drm_gfx_set_shader(void *data,
enum rarch_shader_type type, const char *path)
{
(void)data;
(void)type;
(void)path;
return false;
}
static void drm_gfx_set_rotation(void *data, unsigned rotation)
{
(void)data;
(void)rotation;
}
static bool drm_gfx_read_viewport(void *data, uint8_t *buffer)
{
(void)data;
(void)buffer;
return true;
}
static void drm_set_aspect_ratio (void *data, unsigned aspect_ratio_idx)
{
struct drm_video *_drmvars = data;
/* Here we obtain the new aspect ratio. */
float new_aspect = aspectratio_lut[aspect_ratio_idx].value;
if (_drmvars->current_aspect != new_aspect)
{
_drmvars->current_aspect = new_aspect;
drm_surface_set_aspect(_drmvars->main_surface, new_aspect);
if (_drmvars->menu_active)
{
drm_surface_set_aspect(_drmvars->menu_surface, new_aspect);
drm_plane_setup(_drmvars->menu_surface);
}
}
}
static const video_poke_interface_t drm_poke_interface = {
NULL,
NULL,
NULL, /* set_video_mode */
NULL, /* set_filtering */
NULL, /* get_video_output_size */
NULL, /* get_video_output_prev */
NULL, /* get_video_output_next */
NULL, /* get_current_framebuffer */
NULL, /* get_proc_address */
drm_set_aspect_ratio,
NULL, /* drm_apply_state_changes */
#ifdef HAVE_MENU
drm_set_texture_frame,
drm_set_texture_enable,
#endif
NULL, /* drm_set_osd_msg */
NULL /* drm_show_mouse */
};
static void drm_gfx_get_poke_interface(void *data,
const video_poke_interface_t **iface)
{
(void)data;
*iface = &drm_poke_interface;
}
static void drm_gfx_free(void *data)
{
struct drm_video *_drmvars = data;
if (!_drmvars)
return;
drm_surface_free(_drmvars, &_drmvars->main_surface);
if (_drmvars->menu_surface)
drm_surface_free(_drmvars, &_drmvars->menu_surface);
/* Destroy mutexes and conditions. */
slock_free(_drmvars->pending_mutex);
slock_free(_drmvars->vsync_cond_mutex);
scond_free(_drmvars->vsync_condition);
free(_drmvars);
}
video_driver_t video_drm = {
drm_gfx_init,
drm_gfx_frame,
drm_gfx_set_nonblock_state,
drm_gfx_alive,
drm_gfx_focus,
drm_gfx_suppress_screensaver,
drm_gfx_has_windowed,
drm_gfx_set_shader,
drm_gfx_free,
"drm",
NULL, /* set_viewport */
drm_gfx_set_rotation,
drm_gfx_viewport_info,
drm_gfx_read_viewport,
NULL, /* read_frame_raw */
#ifdef HAVE_OVERLAY
NULL, /* overlay_interface */
#endif
drm_gfx_get_poke_interface
};
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