/*
* Mesa 3-D graphics library
*
* Copyright (c) 2014 The Chromium OS Authors.
* Copyright © 2011 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <xf86drm.h>
#include <dlfcn.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "egl_dri2.h"
#include "egl_dri2_fallbacks.h"
#include "loader.h"
static __DRIimage*
surfaceless_alloc_image(struct dri2_egl_display *dri2_dpy,
struct dri2_egl_surface *dri2_surf)
{
return dri2_dpy->image->createImage(
dri2_dpy->dri_screen,
dri2_surf->base.Width,
dri2_surf->base.Height,
dri2_surf->visual,
0,
NULL);
}
static void
surfaceless_free_images(struct dri2_egl_surface *dri2_surf)
{
struct dri2_egl_display *dri2_dpy =
dri2_egl_display(dri2_surf->base.Resource.Display);
if (dri2_surf->front) {
dri2_dpy->image->destroyImage(dri2_surf->front);
dri2_surf->front = NULL;
}
}
static int
surfaceless_image_get_buffers(__DRIdrawable *driDrawable,
unsigned int format,
uint32_t *stamp,
void *loaderPrivate,
uint32_t buffer_mask,
struct __DRIimageList *buffers)
{
struct dri2_egl_surface *dri2_surf = loaderPrivate;
struct dri2_egl_display *dri2_dpy =
dri2_egl_display(dri2_surf->base.Resource.Display);
buffers->image_mask = 0;
buffers->front = NULL;
buffers->back = NULL;
/* The EGL 1.5 spec states that pbuffers are single-buffered. Specifically,
* the spec states that they have a back buffer but no front buffer, in
* contrast to pixmaps, which have a front buffer but no back buffer.
*
* Single-buffered surfaces with no front buffer confuse Mesa; so we deviate
* from the spec, following the precedent of Mesa's EGL X11 platform. The
* X11 platform correctly assigns pbuffers to single-buffered configs, but
* assigns the pbuffer a front buffer instead of a back buffer.
*
* Pbuffers in the X11 platform mostly work today, so let's just copy its
* behavior instead of trying to fix (and hence potentially breaking) the
* world.
*/
if (buffer_mask & __DRI_IMAGE_BUFFER_FRONT) {
if (!dri2_surf->front)
dri2_surf->front =
surfaceless_alloc_image(dri2_dpy, dri2_surf);
buffers->image_mask |= __DRI_IMAGE_BUFFER_FRONT;
buffers->front = dri2_surf->front;
}
return 1;
}
static _EGLSurface *
dri2_surfaceless_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
_EGLConfig *conf, const EGLint *attrib_list)
{
struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
struct dri2_egl_surface *dri2_surf;
const __DRIconfig *config;
/* Make sure to calloc so all pointers
* are originally NULL.
*/
dri2_surf = calloc(1, sizeof *dri2_surf);
if (!dri2_surf) {
_eglError(EGL_BAD_ALLOC, "eglCreatePbufferSurface");
return NULL;
}
if (!dri2_init_surface(&dri2_surf->base, disp, type, conf, attrib_list, false))
goto cleanup_surface;
config = dri2_get_dri_config(dri2_conf, type,
dri2_surf->base.GLColorspace);
if (!config)
goto cleanup_surface;
dri2_surf->dri_drawable =
dri2_dpy->image_driver->createNewDrawable(dri2_dpy->dri_screen, config,
dri2_surf);
if (dri2_surf->dri_drawable == NULL) {
_eglError(EGL_BAD_ALLOC, "image->createNewDrawable");
goto cleanup_surface;
}
if (conf->RedSize == 5)
dri2_surf->visual = __DRI_IMAGE_FORMAT_RGB565;
else if (conf->AlphaSize == 0)
dri2_surf->visual = __DRI_IMAGE_FORMAT_XRGB8888;
else
dri2_surf->visual = __DRI_IMAGE_FORMAT_ARGB8888;
return &dri2_surf->base;
cleanup_surface:
free(dri2_surf);
return NULL;
}
static EGLBoolean
surfaceless_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
{
struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
surfaceless_free_images(dri2_surf);
dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
dri2_fini_surface(surf);
free(dri2_surf);
return EGL_TRUE;
}
static _EGLSurface *
dri2_surfaceless_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
_EGLConfig *conf, const EGLint *attrib_list)
{
return dri2_surfaceless_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
attrib_list);
}
static EGLBoolean
surfaceless_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
{
assert(!surf || surf->Type == EGL_PBUFFER_BIT);
/* From the EGL 1.5 spec:
* If surface is a [...] pbuffer surface, eglSwapBuffers has no effect.
*/
return EGL_TRUE;
}
static EGLBoolean
surfaceless_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *dpy)
{
struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
static const struct {
const char *format_name;
unsigned int rgba_masks[4];
} visuals[] = {
{ "ARGB8888", { 0xff0000, 0xff00, 0xff, 0xff000000 } },
{ "RGB888", { 0xff0000, 0xff00, 0xff, 0x0 } },
{ "RGB565", { 0x00f800, 0x07e0, 0x1f, 0x0 } },
};
unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
unsigned int config_count = 0;
for (unsigned i = 0; dri2_dpy->driver_configs[i] != NULL; i++) {
for (unsigned j = 0; j < ARRAY_SIZE(visuals); j++) {
struct dri2_egl_config *dri2_conf;
dri2_conf = dri2_add_config(dpy, dri2_dpy->driver_configs[i],
config_count + 1, EGL_PBUFFER_BIT, NULL,
visuals[j].rgba_masks);
if (dri2_conf) {
if (dri2_conf->base.ConfigID == config_count + 1)
config_count++;
format_count[j]++;
}
}
}
for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
if (!format_count[i]) {
_eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
visuals[i].format_name);
}
}
return (config_count != 0);
}
static const struct dri2_egl_display_vtbl dri2_surfaceless_display_vtbl = {
.create_pixmap_surface = dri2_fallback_create_pixmap_surface,
.create_pbuffer_surface = dri2_surfaceless_create_pbuffer_surface,
.destroy_surface = surfaceless_destroy_surface,
.create_image = dri2_create_image_khr,
.swap_buffers = surfaceless_swap_buffers,
.swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
.swap_buffers_region = dri2_fallback_swap_buffers_region,
.set_damage_region = dri2_fallback_set_damage_region,
.post_sub_buffer = dri2_fallback_post_sub_buffer,
.copy_buffers = dri2_fallback_copy_buffers,
.query_buffer_age = dri2_fallback_query_buffer_age,
.create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
.get_sync_values = dri2_fallback_get_sync_values,
.get_dri_drawable = dri2_surface_get_dri_drawable,
};
static void
surfaceless_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
{
}
static const __DRIimageLoaderExtension image_loader_extension = {
.base = { __DRI_IMAGE_LOADER, 1 },
.getBuffers = surfaceless_image_get_buffers,
.flushFrontBuffer = surfaceless_flush_front_buffer,
};
#define DRM_RENDER_DEV_NAME "%s/renderD%d"
static const __DRIextension *image_loader_extensions[] = {
&image_loader_extension.base,
&image_lookup_extension.base,
&use_invalidate.base,
NULL,
};
static bool
surfaceless_probe_device(_EGLDisplay *dpy, bool swrast)
{
struct dri2_egl_display *dri2_dpy = dpy->DriverData;
const int limit = 64;
const int base = 128;
int fd;
int i;
for (i = 0; i < limit; ++i) {
char *card_path;
if (asprintf(&card_path, DRM_RENDER_DEV_NAME, DRM_DIR_NAME, base + i) < 0)
continue;
fd = loader_open_device(card_path);
free(card_path);
if (fd < 0)
continue;
if (swrast)
dri2_dpy->driver_name = strdup("kms_swrast");
else
dri2_dpy->driver_name = loader_get_driver_for_fd(fd);
if (!dri2_dpy->driver_name) {
close(fd);
continue;
}
dri2_dpy->fd = fd;
if (dri2_load_driver_dri3(dpy))
return true;
close(fd);
dri2_dpy->fd = -1;
free(dri2_dpy->driver_name);
dri2_dpy->driver_name = NULL;
}
return false;
}
EGLBoolean
dri2_initialize_surfaceless(_EGLDriver *drv, _EGLDisplay *disp)
{
struct dri2_egl_display *dri2_dpy;
const char* err;
bool driver_loaded = false;
loader_set_logger(_eglLog);
dri2_dpy = calloc(1, sizeof *dri2_dpy);
if (!dri2_dpy)
return _eglError(EGL_BAD_ALLOC, "eglInitialize");
dri2_dpy->fd = -1;
disp->DriverData = (void *) dri2_dpy;
if (!disp->Options.ForceSoftware) {
driver_loaded = surfaceless_probe_device(disp, false);
if (!driver_loaded)
_eglLog(_EGL_WARNING,
"No hardware driver found, falling back to software rendering");
}
if (!driver_loaded && !surfaceless_probe_device(disp, true)) {
err = "DRI2: failed to load driver";
goto cleanup;
}
dri2_dpy->loader_extensions = image_loader_extensions;
if (!dri2_create_screen(disp)) {
err = "DRI2: failed to create screen";
goto cleanup;
}
if (!dri2_setup_extensions(disp)) {
err = "DRI2: failed to find required DRI extensions";
goto cleanup;
}
dri2_setup_screen(disp);
if (!surfaceless_add_configs_for_visuals(drv, disp)) {
err = "DRI2: failed to add configs";
goto cleanup;
}
/* Fill vtbl last to prevent accidentally calling virtual function during
* initialization.
*/
dri2_dpy->vtbl = &dri2_surfaceless_display_vtbl;
return EGL_TRUE;
cleanup:
dri2_display_destroy(disp);
return _eglError(EGL_NOT_INITIALIZED, err);
}