Add dummy backend

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui 2019-08-04 17:52:45 +01:00
parent d702fc9365
commit 8eb9d07fa8
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GPG Key ID: 37C999F617EA1A47
7 changed files with 174 additions and 6 deletions

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@ -10,13 +10,14 @@
#include "region.h" #include "region.h"
#include "win.h" #include "win.h"
extern struct backend_operations xrender_ops; extern struct backend_operations xrender_ops, dummy_ops;
#ifdef CONFIG_OPENGL #ifdef CONFIG_OPENGL
extern struct backend_operations glx_ops; extern struct backend_operations glx_ops;
#endif #endif
struct backend_operations *backend_list[NUM_BKEND] = { struct backend_operations *backend_list[NUM_BKEND] = {
[BKEND_XRENDER] = &xrender_ops, [BKEND_XRENDER] = &xrender_ops,
[BKEND_DUMMY] = &dummy_ops,
#ifdef CONFIG_OPENGL #ifdef CONFIG_OPENGL
[BKEND_GLX] = &glx_ops, [BKEND_GLX] = &glx_ops,
#endif #endif

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@ -225,8 +225,10 @@ struct backend_operations {
// =========== Hooks ============ // =========== Hooks ============
/// Let the backend hook into the event handling queue /// Let the backend hook into the event handling queue
/// Not implemented yet
void (*set_ready_callback)(backend_t *, backend_ready_callback_t cb); void (*set_ready_callback)(backend_t *, backend_ready_callback_t cb);
/// Called right after compton has handled its events. /// Called right after compton has handled its events.
/// Not implemented yet
void (*handle_events)(backend_t *); void (*handle_events)(backend_t *);
// =========== Misc ============ // =========== Misc ============
/// Return the driver that is been used by the backend /// Return the driver that is been used by the backend

159
src/backend/dummy/dummy.c Normal file
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@ -0,0 +1,159 @@
#include <uthash.h>
#include <xcb/xcb.h>
#include "backend/backend_common.h"
#include "common.h"
#include "compiler.h"
#include "uthash_extra.h"
#include "utils.h"
struct dummy_image {
xcb_pixmap_t pixmap;
bool transparent;
int refcount;
UT_hash_handle hh;
};
struct dummy_data {
struct backend_base base;
struct dummy_image *images;
};
struct backend_base *dummy_init(struct session *ps attr_unused) {
return (struct backend_base *)ccalloc(1, struct dummy_data);
}
void dummy_deinit(struct backend_base *data) {
auto dummy = (struct dummy_data *)data;
HASH_ITER2(dummy->images, img) {
log_warn("Backend image for pixmap %#010x is not freed", img->pixmap);
HASH_DEL(dummy->images, img);
free(img);
}
free(dummy);
}
void dummy_compose(struct backend_base *base, void *image, int dst_x attr_unused,
int dst_y attr_unused, const region_t *reg_paint attr_unused,
const region_t *reg_visible attr_unused) {
auto dummy = (struct dummy_data *)base;
auto img = (struct dummy_image *)image;
struct dummy_image *tmp = NULL;
HASH_FIND_INT(dummy->images, &img->pixmap, tmp);
if (!tmp) {
log_warn("Composing with an invalid (possibly freed) image");
}
}
void dummy_fill(struct backend_base *backend_data attr_unused, struct color c attr_unused,
const region_t *clip attr_unused) {
}
bool dummy_blur(struct backend_base *backend_data attr_unused, double opacity attr_unused,
void *blur_ctx attr_unused, const region_t *reg_blur attr_unused,
const region_t *reg_visible attr_unused) {
return true;
}
void *dummy_bind_pixmap(struct backend_base *base, xcb_pixmap_t pixmap,
struct xvisual_info fmt, bool owned attr_unused) {
auto dummy = (struct dummy_data *)base;
struct dummy_image *img = NULL;
HASH_FIND_INT(dummy->images, &pixmap, img);
if (img) {
img->refcount++;
return img;
}
img = ccalloc(1, struct dummy_image);
img->pixmap = pixmap;
img->transparent = fmt.alpha_size != 0;
img->refcount = 1;
HASH_ADD_INT(dummy->images, pixmap, img);
return (void *)img;
}
void dummy_release_image(backend_t *base, void *image) {
auto dummy = (struct dummy_data *)base;
auto img = (struct dummy_image *)image;
assert(img->refcount > 0);
img->refcount--;
if (img->refcount == 0) {
HASH_DEL(dummy->images, img);
free(img);
}
}
bool dummy_is_image_transparent(struct backend_base *base, void *image) {
auto dummy = (struct dummy_data *)base;
auto img = (struct dummy_image *)image;
struct dummy_image *tmp = NULL;
HASH_FIND_INT(dummy->images, &img->pixmap, tmp);
if (!tmp) {
log_warn("Using an invalid (possibly freed) image");
}
return img->transparent;
}
int dummy_buffer_age(struct backend_base *base attr_unused) {
return 2;
}
bool dummy_image_op(struct backend_base *base attr_unused, enum image_operations op attr_unused,
void *image attr_unused, const region_t *reg_op attr_unused,
const region_t *reg_visible attr_unused, void *args attr_unused) {
return true;
}
void *dummy_image_copy(struct backend_base *base, const void *image,
const region_t *reg_visible attr_unused) {
auto dummy = (struct dummy_data *)base;
auto img = (struct dummy_image *)image;
struct dummy_image *tmp = NULL;
HASH_FIND_INT(dummy->images, &img->pixmap, tmp);
if (!tmp) {
log_warn("Using an invalid (possibly freed) image");
}
img->refcount++;
return img;
}
void *dummy_create_blur_context(struct backend_base *base attr_unused,
enum blur_method method attr_unused, void *args attr_unused) {
static int dummy_context;
return &dummy_context;
}
void dummy_destroy_blur_context(struct backend_base *base attr_unused, void *ctx attr_unused) {
}
void dummy_get_blur_size(void *ctx attr_unused, int *width, int *height) {
// These numbers are arbitrary, to make sure the reisze_region code path is
// covered.
*width = 5;
*height = 5;
}
struct backend_operations dummy_ops = {
.init = dummy_init,
.deinit = dummy_deinit,
.compose = dummy_compose,
.fill = dummy_fill,
.blur = dummy_blur,
.bind_pixmap = dummy_bind_pixmap,
.render_shadow = default_backend_render_shadow,
.release_image = dummy_release_image,
.is_image_transparent = dummy_is_image_transparent,
.buffer_age = dummy_buffer_age,
.max_buffer_age = 5,
.image_op = dummy_image_op,
.copy = dummy_image_copy,
.create_blur_context = dummy_create_blur_context,
.destroy_blur_context = dummy_destroy_blur_context,
.get_blur_size = dummy_get_blur_size,
};

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@ -1,5 +1,5 @@
# enable xrender # enable xrender
srcs += [ files('backend_common.c', 'xrender/xrender.c', 'backend.c', 'driver.c') ] srcs += [ files('backend_common.c', 'xrender/xrender.c', 'dummy/dummy.c', 'backend.c', 'driver.c') ]
# enable opengl # enable opengl
if get_option('opengl') if get_option('opengl')

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@ -80,10 +80,11 @@ const char *const WINTYPES[NUM_WINTYPES] = {
}; };
/// Names of backends. /// Names of backends.
const char *const BACKEND_STRS[NUM_BKEND + 1] = {"xrender", // BKEND_XRENDER const char *const BACKEND_STRS[] = {[BKEND_XRENDER] = "xrender",
"glx", // BKEND_GLX [BKEND_GLX] = "glx",
"xr_glx_hybrid", // BKEND_XR_GLX_HYBRID [BKEND_XR_GLX_HYBRID] = "xr_glx_hybrid",
NULL}; [BKEND_DUMMY] = "dummy",
NULL};
// === Global variables === // === Global variables ===

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@ -34,6 +34,7 @@ enum backend {
BKEND_XRENDER, BKEND_XRENDER,
BKEND_GLX, BKEND_GLX,
BKEND_XR_GLX_HYBRID, BKEND_XR_GLX_HYBRID,
BKEND_DUMMY,
NUM_BKEND, NUM_BKEND,
}; };

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@ -1087,6 +1087,10 @@ static bool init_alpha_picts(session_t *ps) {
} }
bool init_render(session_t *ps) { bool init_render(session_t *ps) {
if (ps->o.backend == BKEND_DUMMY) {
return false;
}
// Initialize OpenGL as early as possible // Initialize OpenGL as early as possible
#ifdef CONFIG_OPENGL #ifdef CONFIG_OPENGL
glxext_init(ps->dpy, ps->scr); glxext_init(ps->dpy, ps->scr);