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android_bootable_recovery/minuitwrp/graphics_overlay.cpp
Vladimir Oltean d32b7ebf20 TW_ROTATION: add flag to handle hardware-rotated display panels 
* The existence of TW_ROTATION that implements this feature at the
  level of calls to libpixelflinger API closely mirrors the existence of
  ro.sf.hwrotation for surfaceflinger in LineageOS.
* A brute-force approach was previously attempted via the
  BOARD_HAS_FLIPPED_SCREEN makefile flag. That code iterated over the
  active display surface in a double-buffered setup, and performed a
  "smart" memcpy from the UI drawing surface (gr_draw) onto the display
  surface. The problem was that, without heavy loop optimizations, that
  code could have never scaled for 90 and 270 degree rotation.
  I tried and you could literally see the for loop with the naked eye
  while the display surface was updating.
* That code is now gone, but support for BOARD_HAS_FLIPPED_SCREEN := true
  is still there (now means TW_ROTATION := 180).
* This patch relies on the assumption that it is impossibly difficult
  and non-portable to rotate whole framebuffer display surfaces, in a
  way that is not dependent upon the graphics backend (adf, fbdev, drm,
  overlay etc). Therefore, it identifies the rendering primitives that
  the TWRP graphics stack exposes to the GUI application above, and
  implements hwrotation inside each of those calls instead:
    - gr_line(), gr_fill() - 2D geometric shapes (lines, rectangles)
    - gr_blit() - graphical image resources
    - gr_ttf_textExWH() - font rendering
    - gr_fb_width(), gr_fb_height() - framebuffer resolution
* The gist is to keep the backend and framebuffer (dimensions, row size
  etc) unchanged (because making changes there is asking for trouble),
  but present an altogether different reality to the calling API,
  according to the compile-time constant TW_ROTATION.
* All (x, y) API coordinates and shapes are transformed before being
  actually rendered as (x_disp, y_disp) display coordinates.
* With TW_ROTATION := 90 or 270 you can turn a landscape device into
  a portrait one, because the GUI is fooled by the reversed dimensions
  reported by gr_fb_width() and gr_fb_height() and renders the UI as
  for a different device.
* For blit and text rendering operations, figuring out the transformed
  coordinates in display space is not enough, as the surfaces that are
  to be rendered have to be rotated themselves. This is handled by
  allocating an intermediary rotated surface on each rendering
  operation (not ideal), so the code with the intermediary surface
  is compiled out for the TW_ROTATION := 0 case.
* This is still not as bad as rotating the whole framebuffer though, and
  on a msm8976 device the performance hit is not even noticeable (for
  software rendering).
* Currently there is no attempt to make a connection between the
  TW_ROTATION and the { RECOVERY_TOUCHSCREEN_SWAP_XY,
  RECOVERY_TOUCHSCREEN_FLIP_X, RECOVERY_TOUCHSCREEN_FLIP_Y } settings.

Change-Id: Ic8966ad5360c8a499649fdb16e242286640fd992
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
2019-03-18 11:39:38 -05:00

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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/cdefs.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <linux/fb.h>
#include <linux/kd.h>
#ifdef MSM_BSP
#include <linux/msm_mdp.h>
#include <linux/msm_ion.h>
#endif
#include "minui.h"
#include "graphics.h"
#include <pixelflinger/pixelflinger.h>
#define MDP_V4_0 400
#define MAX_DISPLAY_DIM 2048
static GRSurface* overlay_init(minui_backend*);
static GRSurface* overlay_flip(minui_backend*);
static void overlay_blank(minui_backend*, bool);
static void overlay_exit(minui_backend*);
static GRSurface gr_framebuffer;
static GRSurface* gr_draw = NULL;
static fb_var_screeninfo vi;
static int fb_fd = -1;
static bool isMDP5 = false;
static int leftSplit = 0;
static int rightSplit = 0;
#define ALIGN(x, align) (((x) + ((align)-1)) & ~((align)-1))
static size_t frame_size = 0;
#ifdef MSM_BSP
typedef struct {
unsigned char *mem_buf;
int size;
int ion_fd;
int mem_fd;
struct ion_handle_data handle_data;
} memInfo;
//Left and right overlay id
static int overlayL_id = MSMFB_NEW_REQUEST;
static int overlayR_id = MSMFB_NEW_REQUEST;
static memInfo mem_info;
static int map_mdp_pixel_format()
{
if (gr_framebuffer.format == GGL_PIXEL_FORMAT_RGB_565)
return MDP_RGB_565;
else if (gr_framebuffer.format == GGL_PIXEL_FORMAT_BGRA_8888)
return MDP_BGRA_8888;
else if (gr_framebuffer.format == GGL_PIXEL_FORMAT_RGBA_8888)
return MDP_RGBA_8888;
else if (gr_framebuffer.format == GGL_PIXEL_FORMAT_RGBX_8888)
return MDP_RGBA_8888;
printf("No known pixel format for map_mdp_pixel_format, defaulting to MDP_RGB_565.\n");
return MDP_RGB_565;
}
#endif // MSM_BSP
static minui_backend my_backend = {
.init = overlay_init,
.flip = overlay_flip,
.blank = overlay_blank,
.exit = overlay_exit,
};
bool target_has_overlay(char *version)
{
int mdp_version;
bool overlay_supported = false;
if (strlen(version) >= 8) {
if(!strncmp(version, "msmfb", strlen("msmfb"))) {
char str_ver[4];
memcpy(str_ver, version + strlen("msmfb"), 3);
str_ver[3] = '\0';
mdp_version = atoi(str_ver);
if (mdp_version >= MDP_V4_0) {
overlay_supported = true;
}
} else if (!strncmp(version, "mdssfb", strlen("mdssfb"))) {
overlay_supported = true;
isMDP5 = true;
}
}
return overlay_supported;
}
minui_backend* open_overlay() {
fb_fix_screeninfo fi;
int fd;
fd = open("/dev/graphics/fb0", O_RDWR);
if (fd < 0) {
perror("open_overlay cannot open fb0");
return NULL;
}
if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) {
perror("failed to get fb0 info");
close(fd);
return NULL;
}
if (target_has_overlay(fi.id)) {
#ifdef MSM_BSP
close(fd);
return &my_backend;
#else
printf("Overlay graphics may work (%s), but not enabled. Use TW_TARGET_USES_QCOM_BSP := true to enable.\n", fi.id);
#endif
}
close(fd);
return NULL;
}
static void overlay_blank(minui_backend* backend __unused, bool blank)
{
#if defined(TW_NO_SCREEN_BLANK) && defined(TW_BRIGHTNESS_PATH) && defined(TW_MAX_BRIGHTNESS)
int fd;
char brightness[4];
snprintf(brightness, 4, "%03d", TW_MAX_BRIGHTNESS/2);
fd = open(TW_BRIGHTNESS_PATH, O_RDWR);
if (fd < 0) {
perror("cannot open LCD backlight");
return;
}
write(fd, blank ? "000" : brightness, 3);
close(fd);
#ifdef TW_SECONDARY_BRIGHTNESS_PATH
fd = open(TW_SECONDARY_BRIGHTNESS_PATH, O_RDWR);
if (fd < 0) {
perror("cannot open LCD backlight 2");
return;
}
write(fd, blank ? "000" : brightness, 3);
close(fd);
#endif
#else
int ret;
ret = ioctl(fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK);
if (ret < 0)
perror("ioctl(): blank");
#endif
}
#ifdef MSM_BSP
void setDisplaySplit(void) {
char split[64] = {0};
if (!isMDP5)
return;
FILE* fp = fopen("/sys/class/graphics/fb0/msm_fb_split", "r");
if (fp) {
//Format "left right" space as delimiter
if(fread(split, sizeof(char), 64, fp)) {
leftSplit = atoi(split);
printf("Left Split=%d\n",leftSplit);
char *rght = strpbrk(split, " ");
if (rght)
rightSplit = atoi(rght + 1);
printf("Right Split=%d\n", rightSplit);
}
} else {
printf("Failed to open mdss_fb_split node\n");
}
if (fp)
fclose(fp);
}
int getLeftSplit(void) {
//Default even split for all displays with high res
int lSplit = vi.xres / 2;
//Override if split published by driver
if (leftSplit)
lSplit = leftSplit;
return lSplit;
}
int getRightSplit(void) {
return rightSplit;
}
int free_ion_mem(void) {
int ret = 0;
if (mem_info.mem_buf)
munmap(mem_info.mem_buf, mem_info.size);
if (mem_info.ion_fd >= 0) {
ret = ioctl(mem_info.ion_fd, ION_IOC_FREE, &mem_info.handle_data);
if (ret < 0)
perror("free_mem failed ");
}
if (mem_info.mem_fd >= 0)
close(mem_info.mem_fd);
if (mem_info.ion_fd >= 0)
close(mem_info.ion_fd);
memset(&mem_info, 0, sizeof(mem_info));
mem_info.mem_fd = -1;
mem_info.ion_fd = -1;
return 0;
}
int alloc_ion_mem(unsigned int size)
{
int result;
struct ion_fd_data fd_data;
struct ion_allocation_data ionAllocData;
mem_info.ion_fd = open("/dev/ion", O_RDWR|O_DSYNC);
if (mem_info.ion_fd < 0) {
perror("ERROR: Can't open ion ");
return -errno;
}
ionAllocData.flags = 0;
ionAllocData.len = size;
ionAllocData.align = sysconf(_SC_PAGESIZE);
#ifdef NEW_ION_HEAP
ionAllocData.heap_id_mask =
#else
ionAllocData.heap_mask =
#endif
ION_HEAP(ION_IOMMU_HEAP_ID) |
ION_HEAP(ION_SYSTEM_CONTIG_HEAP_ID);
result = ioctl(mem_info.ion_fd, ION_IOC_ALLOC, &ionAllocData);
if(result){
perror("ION_IOC_ALLOC Failed ");
close(mem_info.ion_fd);
return result;
}
fd_data.handle = ionAllocData.handle;
mem_info.handle_data.handle = ionAllocData.handle;
result = ioctl(mem_info.ion_fd, ION_IOC_MAP, &fd_data);
if (result) {
perror("ION_IOC_MAP Failed ");
free_ion_mem();
return result;
}
mem_info.mem_buf = (unsigned char *)mmap(NULL, size, PROT_READ |
PROT_WRITE, MAP_SHARED, fd_data.fd, 0);
mem_info.mem_fd = fd_data.fd;
if (!mem_info.mem_buf) {
perror("ERROR: mem_buf MAP_FAILED ");
free_ion_mem();
return -ENOMEM;
}
return 0;
}
bool isDisplaySplit(void) {
if (vi.xres > MAX_DISPLAY_DIM)
return true;
//check if right split is set by driver
if (getRightSplit())
return true;
return false;
}
int allocate_overlay(int fd, GRSurface gr_fb)
{
int ret = 0;
if (!isDisplaySplit()) {
// Check if overlay is already allocated
if (MSMFB_NEW_REQUEST == overlayL_id) {
struct mdp_overlay overlayL;
memset(&overlayL, 0 , sizeof (struct mdp_overlay));
/* Fill Overlay Data */
overlayL.src.width = ALIGN(gr_fb.width, 32);
overlayL.src.height = gr_fb.height;
overlayL.src.format = map_mdp_pixel_format();
overlayL.src_rect.w = gr_fb.width;
overlayL.src_rect.h = gr_fb.height;
overlayL.dst_rect.w = gr_fb.width;
overlayL.dst_rect.h = gr_fb.height;
overlayL.alpha = 0xFF;
// If this worked, life would have been so much easier
//switch (TW_ROTATION) {
//case 0: overlayL.flags = MDP_ROT_NOP; break;
//case 90: overlayL.flags = MDP_ROT_90; break;
//case 180: overlayL.flags = MDP_ROT_180; break;
//case 270: overlayL.flags = MDP_ROT_270; break;
//}
overlayL.transp_mask = MDP_TRANSP_NOP;
overlayL.id = MSMFB_NEW_REQUEST;
ret = ioctl(fd, MSMFB_OVERLAY_SET, &overlayL);
if (ret < 0) {
perror("Overlay Set Failed");
return ret;
}
overlayL_id = overlayL.id;
}
} else {
float xres = vi.xres;
int lSplit = getLeftSplit();
float lSplitRatio = lSplit / xres;
float lCropWidth = gr_fb.width * lSplitRatio;
int lWidth = lSplit;
int rWidth = gr_fb.width - lSplit;
int height = gr_fb.height;
if (MSMFB_NEW_REQUEST == overlayL_id) {
struct mdp_overlay overlayL;
memset(&overlayL, 0 , sizeof (struct mdp_overlay));
/* Fill OverlayL Data */
overlayL.src.width = ALIGN(gr_fb.width, 32);
overlayL.src.height = gr_fb.height;
overlayL.src.format = map_mdp_pixel_format();
overlayL.src_rect.x = 0;
overlayL.src_rect.y = 0;
overlayL.src_rect.w = lCropWidth;
overlayL.src_rect.h = gr_fb.height;
overlayL.dst_rect.x = 0;
overlayL.dst_rect.y = 0;
overlayL.dst_rect.w = lWidth;
overlayL.dst_rect.h = height;
overlayL.alpha = 0xFF;
// If this worked, life would have been so much easier
//switch (TW_ROTATION) {
//case 0: overlayL.flags = MDP_ROT_NOP; break;
//case 90: overlayL.flags = MDP_ROT_90; break;
//case 180: overlayL.flags = MDP_ROT_180; break;
//case 270: overlayL.flags = MDP_ROT_270; break;
//}
overlayL.transp_mask = MDP_TRANSP_NOP;
overlayL.id = MSMFB_NEW_REQUEST;
ret = ioctl(fd, MSMFB_OVERLAY_SET, &overlayL);
if (ret < 0) {
perror("OverlayL Set Failed");
return ret;
}
overlayL_id = overlayL.id;
}
if (MSMFB_NEW_REQUEST == overlayR_id) {
struct mdp_overlay overlayR;
memset(&overlayR, 0 , sizeof (struct mdp_overlay));
/* Fill OverlayR Data */
overlayR.src.width = ALIGN(gr_fb.width, 32);
overlayR.src.height = gr_fb.height;
overlayR.src.format = map_mdp_pixel_format();
overlayR.src_rect.x = lCropWidth;
overlayR.src_rect.y = 0;
overlayR.src_rect.w = gr_fb.width - lCropWidth;
overlayR.src_rect.h = gr_fb.height;
overlayR.dst_rect.x = 0;
overlayR.dst_rect.y = 0;
overlayR.dst_rect.w = rWidth;
overlayR.dst_rect.h = height;
overlayR.alpha = 0xFF;
overlayR.flags = MDSS_MDP_RIGHT_MIXER;
// If this worked, life would have been so much easier
//switch (TW_ROTATION) {
//case 0: overlayR.flags |= MDP_ROT_NOP; break;
//case 90: overlayR.flags |= MDP_ROT_90; break;
//case 180: overlayR.flags |= MDP_ROT_180; break;
//case 270: overlayR.flags |= MDP_ROT_270; break;
//}
overlayR.transp_mask = MDP_TRANSP_NOP;
overlayR.id = MSMFB_NEW_REQUEST;
ret = ioctl(fd, MSMFB_OVERLAY_SET, &overlayR);
if (ret < 0) {
perror("OverlayR Set Failed");
return ret;
}
overlayR_id = overlayR.id;
}
}
return 0;
}
int overlay_display_frame(int fd, void* data, size_t size)
{
int ret = 0;
struct msmfb_overlay_data ovdataL, ovdataR;
struct mdp_display_commit ext_commit;
if (!isDisplaySplit()) {
if (overlayL_id == MSMFB_NEW_REQUEST) {
perror("display_frame failed, no overlay\n");
return -EINVAL;
}
memcpy(mem_info.mem_buf, data, size);
memset(&ovdataL, 0, sizeof(struct msmfb_overlay_data));
ovdataL.id = overlayL_id;
ovdataL.data.flags = 0;
ovdataL.data.offset = 0;
ovdataL.data.memory_id = mem_info.mem_fd;
ret = ioctl(fd, MSMFB_OVERLAY_PLAY, &ovdataL);
if (ret < 0) {
perror("overlay_display_frame failed, overlay play Failed\n");
printf("%i, %i, %i, %i\n", ret, fb_fd, fd, errno);
return ret;
}
} else {
if (overlayL_id == MSMFB_NEW_REQUEST) {
perror("display_frame failed, no overlayL \n");
return -EINVAL;
}
memcpy(mem_info.mem_buf, data, size);
memset(&ovdataL, 0, sizeof(struct msmfb_overlay_data));
ovdataL.id = overlayL_id;
ovdataL.data.flags = 0;
ovdataL.data.offset = 0;
ovdataL.data.memory_id = mem_info.mem_fd;
ret = ioctl(fd, MSMFB_OVERLAY_PLAY, &ovdataL);
if (ret < 0) {
perror("overlay_display_frame failed, overlayL play Failed\n");
return ret;
}
if (overlayR_id == MSMFB_NEW_REQUEST) {
perror("display_frame failed, no overlayR \n");
return -EINVAL;
}
memset(&ovdataR, 0, sizeof(struct msmfb_overlay_data));
ovdataR.id = overlayR_id;
ovdataR.data.flags = 0;
ovdataR.data.offset = 0;
ovdataR.data.memory_id = mem_info.mem_fd;
ret = ioctl(fd, MSMFB_OVERLAY_PLAY, &ovdataR);
if (ret < 0) {
perror("overlay_display_frame failed, overlayR play Failed\n");
return ret;
}
}
memset(&ext_commit, 0, sizeof(struct mdp_display_commit));
ext_commit.flags = MDP_DISPLAY_COMMIT_OVERLAY;
ext_commit.wait_for_finish = 1;
ret = ioctl(fd, MSMFB_DISPLAY_COMMIT, &ext_commit);
if (ret < 0) {
perror("overlay_display_frame failed, overlay commit Failed\n!");
}
return ret;
}
static GRSurface* overlay_flip(minui_backend* backend __unused) {
#if defined(RECOVERY_BGRA)
// In case of BGRA, do some byte swapping
unsigned char* ucfb_vaddr = (unsigned char*)gr_draw->data;
for (int idx = 0 ; idx < (gr_draw->height * gr_draw->row_bytes);
idx += 4) {
unsigned char tmp = ucfb_vaddr[idx];
ucfb_vaddr[idx ] = ucfb_vaddr[idx + 2];
ucfb_vaddr[idx + 2] = tmp;
}
#endif
// Copy from the in-memory surface to the framebuffer.
overlay_display_frame(fb_fd, gr_draw->data, frame_size);
return gr_draw;
}
int free_overlay(int fd)
{
int ret = 0;
struct mdp_display_commit ext_commit;
if (!isDisplaySplit()) {
if (overlayL_id != MSMFB_NEW_REQUEST) {
ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayL_id);
if (ret) {
perror("Overlay Unset Failed");
overlayL_id = MSMFB_NEW_REQUEST;
return ret;
}
}
} else {
if (overlayL_id != MSMFB_NEW_REQUEST) {
ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayL_id);
if (ret) {
perror("OverlayL Unset Failed");
}
}
if (overlayR_id != MSMFB_NEW_REQUEST) {
ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayR_id);
if (ret) {
perror("OverlayR Unset Failed");
overlayR_id = MSMFB_NEW_REQUEST;
return ret;
}
}
}
memset(&ext_commit, 0, sizeof(struct mdp_display_commit));
ext_commit.flags = MDP_DISPLAY_COMMIT_OVERLAY;
ext_commit.wait_for_finish = 1;
ret = ioctl(fd, MSMFB_DISPLAY_COMMIT, &ext_commit);
if (ret < 0) {
perror("ERROR: Clear MSMFB_DISPLAY_COMMIT failed!");
overlayL_id = MSMFB_NEW_REQUEST;
overlayR_id = MSMFB_NEW_REQUEST;
return ret;
}
overlayL_id = MSMFB_NEW_REQUEST;
overlayR_id = MSMFB_NEW_REQUEST;
return 0;
}
static GRSurface* overlay_init(minui_backend* backend) {
int fd = open("/dev/graphics/fb0", O_RDWR);
if (fd == -1) {
perror("cannot open fb0");
return NULL;
}
fb_fix_screeninfo fi;
if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) {
perror("failed to get fb0 info");
close(fd);
return NULL;
}
if (ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) {
perror("failed to get fb0 info");
close(fd);
return NULL;
}
// We print this out for informational purposes only, but
// throughout we assume that the framebuffer device uses an RGBX
// pixel format. This is the case for every development device I
// have access to. For some of those devices (eg, hammerhead aka
// Nexus 5), FBIOGET_VSCREENINFO *reports* that it wants a
// different format (XBGR) but actually produces the correct
// results on the display when you write RGBX.
//
// If you have a device that actually *needs* another pixel format
// (ie, BGRX, or 565), patches welcome...
printf("fb0 reports (possibly inaccurate):\n"
" vi.bits_per_pixel = %d\n"
" vi.red.offset = %3d .length = %3d\n"
" vi.green.offset = %3d .length = %3d\n"
" vi.blue.offset = %3d .length = %3d\n",
vi.bits_per_pixel,
vi.red.offset, vi.red.length,
vi.green.offset, vi.green.length,
vi.blue.offset, vi.blue.length);
gr_framebuffer.width = vi.xres;
gr_framebuffer.height = vi.yres;
gr_framebuffer.row_bytes = fi.line_length;
gr_framebuffer.pixel_bytes = vi.bits_per_pixel / 8;
//gr_framebuffer.data = reinterpret_cast<uint8_t*>(bits);
if (vi.bits_per_pixel == 16) {
printf("setting GGL_PIXEL_FORMAT_RGB_565\n");
gr_framebuffer.format = GGL_PIXEL_FORMAT_RGB_565;
} else if (vi.red.offset == 8 || vi.red.offset == 16) {
printf("setting GGL_PIXEL_FORMAT_BGRA_8888\n");
gr_framebuffer.format = GGL_PIXEL_FORMAT_BGRA_8888;
} else if (vi.red.offset == 0) {
printf("setting GGL_PIXEL_FORMAT_RGBA_8888\n");
gr_framebuffer.format = GGL_PIXEL_FORMAT_RGBA_8888;
} else if (vi.red.offset == 24) {
printf("setting GGL_PIXEL_FORMAT_RGBX_8888\n");
gr_framebuffer.format = GGL_PIXEL_FORMAT_RGBX_8888;
} else {
if (vi.red.length == 8) {
printf("No valid pixel format detected, trying GGL_PIXEL_FORMAT_RGBX_8888\n");
gr_framebuffer.format = GGL_PIXEL_FORMAT_RGBX_8888;
} else {
printf("No valid pixel format detected, trying GGL_PIXEL_FORMAT_RGB_565\n");
gr_framebuffer.format = GGL_PIXEL_FORMAT_RGB_565;
}
}
frame_size = fi.line_length * vi.yres;
gr_framebuffer.data = reinterpret_cast<uint8_t*>(calloc(frame_size, 1));
if (gr_framebuffer.data == NULL) {
perror("failed to calloc framebuffer");
close(fd);
return NULL;
}
gr_draw = &gr_framebuffer;
fb_fd = fd;
printf("framebuffer: %d (%d x %d)\n", fb_fd, gr_draw->width, gr_draw->height);
overlay_blank(backend, true);
overlay_blank(backend, false);
if (!alloc_ion_mem(frame_size))
allocate_overlay(fb_fd, gr_framebuffer);
return gr_draw;
}
static void overlay_exit(minui_backend* backend __unused) {
free_overlay(fb_fd);
free_ion_mem();
close(fb_fd);
fb_fd = -1;
if (gr_draw) {
free(gr_draw->data);
free(gr_draw);
}
gr_draw = NULL;
}
#else // MSM_BSP
static GRSurface* overlay_flip(minui_backend* backend __unused) {
return NULL;
}
static GRSurface* overlay_init(minui_backend* backend __unused) {
return NULL;
}
static void overlay_exit(minui_backend* backend __unused) {
return;
}
#endif // MSM_BSP
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