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minui: Move graphics_{adf,drm,fbdev} into classes.

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This CL defines minui_backend as an interface, and expresses the three
backends (adf, drm and fbdev) as subclasses to the interface.

Test: 'Run graphics test' on N9, Pixel C and N5X.
Change-Id: I0e23951c7b2e2ff918957a8d9fc8b0085b6e5952
This commit is contained in:
Tao Bao
2017-02-07 12:51:00 -08:00
parent df464dbe79
commit 557fa1f45e
8 changed files with 332 additions and 270 deletions
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49
minui/graphics_fbdev.cpp
View File

@@ -14,6 +14,8 @@
* limitations under the License.
*/
#include "graphics_fbdev.h"
#include <fcntl.h>
#include <linux/fb.h>
#include <stdio.h>
@@ -25,40 +27,15 @@
#include <unistd.h>
#include "minui/minui.h"
#include "graphics.h"
static GRSurface* fbdev_init(minui_backend*);
static GRSurface* fbdev_flip(minui_backend*);
static void fbdev_blank(minui_backend*, bool);
static void fbdev_exit(minui_backend*);
MinuiBackendFbdev::MinuiBackendFbdev() : gr_draw(nullptr), fb_fd(-1) {}
static GRSurface gr_framebuffer[2];
static bool double_buffered;
static GRSurface* gr_draw = nullptr;
static int displayed_buffer;
static fb_var_screeninfo vi;
static int fb_fd = -1;
static minui_backend my_backend = {
.init = fbdev_init,
.flip = fbdev_flip,
.blank = fbdev_blank,
.exit = fbdev_exit,
};
minui_backend* open_fbdev() {
return &my_backend;
}
static void fbdev_blank(minui_backend* backend __unused, bool blank) {
void MinuiBackendFbdev::Blank(bool blank) {
int ret = ioctl(fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK);
if (ret < 0) {
perror("ioctl(): blank");
}
if (ret < 0) perror("ioctl(): blank");
}
static void set_displayed_framebuffer(unsigned n) {
void MinuiBackendFbdev::SetDisplayedFramebuffer(unsigned n) {
if (n > 1 || !double_buffered) return;
vi.yres_virtual = gr_framebuffer[0].height * 2;
@@ -70,7 +47,7 @@ static void set_displayed_framebuffer(unsigned n) {
displayed_buffer = n;
}
static GRSurface* fbdev_init(minui_backend* backend) {
GRSurface* MinuiBackendFbdev::Init() {
int fd = open("/dev/graphics/fb0", O_RDWR);
if (fd == -1) {
perror("cannot open fb0");
@@ -154,23 +131,23 @@ static GRSurface* fbdev_init(minui_backend* backend) {
memset(gr_draw->data, 0, gr_draw->height * gr_draw->row_bytes);
fb_fd = fd;
set_displayed_framebuffer(0);
SetDisplayedFramebuffer(0);
printf("framebuffer: %d (%d x %d)\n", fb_fd, gr_draw->width, gr_draw->height);
fbdev_blank(backend, true);
fbdev_blank(backend, false);
Blank(true);
Blank(false);
return gr_draw;
}
static GRSurface* fbdev_flip(minui_backend* backend __unused) {
GRSurface* MinuiBackendFbdev::Flip() {
if (double_buffered) {
// Change gr_draw to point to the buffer currently displayed,
// then flip the driver so we're displaying the other buffer
// instead.
gr_draw = gr_framebuffer + displayed_buffer;
set_displayed_framebuffer(1 - displayed_buffer);
SetDisplayedFramebuffer(1 - displayed_buffer);
} else {
// Copy from the in-memory surface to the framebuffer.
memcpy(gr_framebuffer[0].data, gr_draw->data, gr_draw->height * gr_draw->row_bytes);
@@ -178,7 +155,7 @@ static GRSurface* fbdev_flip(minui_backend* backend __unused) {
return gr_draw;
}
static void fbdev_exit(minui_backend* backend __unused) {
MinuiBackendFbdev::~MinuiBackendFbdev() {
close(fb_fd);
fb_fd = -1;