minui/graphics_overlay.cpp - android_bootable_recovery - Gitiles

 /*
  * 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>
 #else
 #define MSMFB_NEW_REQUEST 0
 #endif

 #include "graphics_overlay.h"

 #include "minui/minui.h"

 #define MDP_V4_0 400
 #define MAX_DISPLAY_DIM  2048
 #define ALIGN(x, align) (((x) + ((align)-1)) & ~((align)-1))

 MinuiBackendOverlay::MinuiBackendOverlay() :
   fb_fd(-1),
   isMDP5(false),
   leftSplit(0),
   rightSplit(0),
   frame_size(0),
   overlayL_id(MSMFB_NEW_REQUEST),
   overlayR_id(MSMFB_NEW_REQUEST) {}

 #ifdef MSM_BSP
 int MinuiBackendOverlay::map_mdp_pixel_format()
 {
     int format = MDP_RGB_565;
 #if defined(RECOVERY_BGRA)
     format = MDP_BGRA_8888;
 #elif defined(RECOVERY_RGBA)
     format = MDP_RGBA_8888;
 #elif defined(RECOVERY_RGBX)
     format = MDP_RGBA_8888;
 #endif
     return format;
 }

 static memInfo mem_info;

 #endif // MSM_BSP

 bool MinuiBackendOverlay::target_has_overlay()
 {
     int mdp_version;
     bool overlay_supported = false;
     fb_fix_screeninfo fi;
     int fd;

     fd = open("/dev/graphics/fb0", O_RDWR);
     if (fd < 0) {
         perror("open_overlay cannot open fb0");
         return false;
     }

     if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) {
         perror("failed to get fb0 info");
         close(fd);
         return false;
     }
     close(fd);

     if (strlen(fi.id) >= 8) {
         if(!strncmp(fi.id, "msmfb", strlen("msmfb"))) {
             char str_ver[4];
             memcpy(str_ver, fi.id + strlen("msmfb"), 3);
             str_ver[3] = '\0';
             mdp_version = atoi(str_ver);
             if (mdp_version >= MDP_V4_0) {
                 overlay_supported = true;
             }
         } else if (!strncmp(fi.id, "mdssfb", strlen("mdssfb"))) {
             overlay_supported = true;
             isMDP5 = true;
         }
     }
 #ifndef MSM_BSP
     if (overlay_supported)
         printf("Overlay graphics may work (%s), but not enabled. Use TW_TARGET_USES_QCOM_BSP := true to enable.\n", fi.id);
 #endif
     return overlay_supported;
 }

 void MinuiBackendOverlay::Blank(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);
 #else
     int ret;

     ret = ioctl(fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK);
     if (ret < 0)
         perror("ioctl(): blank");
 #endif
 }

 void MinuiBackendOverlay::SetDisplayedFramebuffer(unsigned n)
 {
     if (n > 1 || !double_buffered) return;

     vi.yres_virtual = gr_framebuffer[0].height * 2;
     vi.yoffset = n * gr_framebuffer[0].height;
     vi.bits_per_pixel = gr_framebuffer[0].pixel_bytes * 8;
     if (ioctl(fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) {
         perror("active fb swap failed");
     }
     displayed_buffer = n;
 }

 #ifdef MSM_BSP
 void MinuiBackendOverlay::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 MinuiBackendOverlay::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 MinuiBackendOverlay::getRightSplit(void) {
    return rightSplit;
 }

 int MinuiBackendOverlay::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 MinuiBackendOverlay::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 MinuiBackendOverlay::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 MinuiBackendOverlay::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[0].width, 32);
             overlayL.src.height = gr_fb[0].height;
             overlayL.src.format = map_mdp_pixel_format();
             overlayL.src_rect.w = gr_fb[0].width;
             overlayL.src_rect.h = gr_fb[0].height;
             overlayL.dst_rect.w = gr_fb[0].width;
             overlayL.dst_rect.h = gr_fb[0].height;
             overlayL.alpha = 0xFF;
             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[0].width * lSplitRatio;
         int lWidth = lSplit;
         int rWidth = gr_fb[0].width - lSplit;
         int height = gr_fb[0].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[0].width, 32);
             overlayL.src.height = gr_fb[0].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[0].height;
             overlayL.dst_rect.x = 0;
             overlayL.dst_rect.y = 0;
             overlayL.dst_rect.w = lWidth;
             overlayL.dst_rect.h = height;
             overlayL.alpha = 0xFF;
             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[0].width, 32);
             overlayR.src.height = gr_fb[0].height;
             overlayR.src.format = map_mdp_pixel_format();
             overlayR.src_rect.x = lCropWidth;
             overlayR.src_rect.y = 0;
             overlayR.src_rect.w = gr_fb[0].width - lCropWidth;
             overlayR.src_rect.h = gr_fb[0].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;
             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 MinuiBackendOverlay::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");
             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;
 }

 GRSurface* MinuiBackendOverlay::Flip() {
     if (double_buffered) {
 #if defined(RECOVERY_BGRA)
         // In case of BGRA, do some byte swapping
         unsigned int idx;
         unsigned char tmp;
         unsigned char* ucfb_vaddr = (unsigned char*)gr_draw->data;
         for (idx = 0 ; idx < (gr_draw->height * gr_draw->row_bytes);
                 idx += 4) {
             tmp = ucfb_vaddr[idx];
             ucfb_vaddr[idx    ] = ucfb_vaddr[idx + 2];
             ucfb_vaddr[idx + 2] = tmp;
         }
 #endif
         // 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;
         SetDisplayedFramebuffer(1-displayed_buffer);
         overlay_display_frame(fb_fd, gr_draw->data, frame_size);
     } else {
         // Copy from the in-memory surface to the framebuffer.
         overlay_display_frame(fb_fd, gr_draw->data, frame_size);
     }
     return gr_draw;
 }

 int MinuiBackendOverlay::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");
                 overlayL_id = MSMFB_NEW_REQUEST;
                 return ret;
             }
         }

         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;
 }

 GRSurface* MinuiBackendOverlay::Init() {
 	gr_draw = NULL; // this should be in the constructor but 9.0 was throwing a compile error
 	if (!target_has_overlay())
 	    return NULL;

     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);

     void* bits = malloc(vi.xres_virtual * vi.yres * (vi.bits_per_pixel / 8));
     if (bits == NULL) {
         perror("failed to malloc framebuffer");
         close(fd);
         return NULL;
     }

     memset(bits, 0, fi.smem_len);

     gr_framebuffer[0].width = vi.xres;
     gr_framebuffer[0].height = vi.yres;
     gr_framebuffer[0].row_bytes = fi.line_length;
     gr_framebuffer[0].pixel_bytes = vi.bits_per_pixel / 8;
     gr_framebuffer[0].data = reinterpret_cast<uint8_t*>(bits);
     memset(gr_framebuffer[0].data, 0, gr_framebuffer[0].height * gr_framebuffer[0].row_bytes);

     /* check if we can use double buffering */
     if (vi.yres * fi.line_length * 2 <= fi.smem_len) {
         double_buffered = true;
         printf("double buffered.\n");
         memcpy(gr_framebuffer+1, gr_framebuffer, sizeof(GRSurface));
         gr_framebuffer[1].data = gr_framebuffer[0].data +
             gr_framebuffer[0].height * gr_framebuffer[0].row_bytes;

         gr_draw = gr_framebuffer+1;

     } else {
         double_buffered = false;
         printf("single buffered.\n");
         // Without double-buffering, we allocate RAM for a buffer to
         // draw in, and then "flipping" the buffer consists of a
         // memcpy from the buffer we allocated to the framebuffer.

         gr_draw = (GRSurface*) malloc(sizeof(GRSurface));
         if (gr_draw == NULL) {
             printf("Failed to malloc gr_draw for single buffering.\n");
             return NULL;
         } else {
             memcpy(gr_draw, gr_framebuffer, sizeof(GRSurface));
             gr_draw->data = (unsigned char*) malloc(gr_draw->height * gr_draw->row_bytes);
             if (!gr_draw->data) {
                 perror("failed to allocate in-memory surface");
                 return NULL;
             }
         }
     }

     memset(gr_draw->data, 0, gr_draw->height * gr_draw->row_bytes);
     fb_fd = fd;
     SetDisplayedFramebuffer(0);

     frame_size = fi.line_length * vi.yres;

     printf("framebuffer: %d (%d x %d)\n", fb_fd, gr_draw->width, gr_draw->height);

     Blank(true);
     Blank(false);

     if (!alloc_ion_mem(fi.line_length * vi.yres))
         allocate_overlay(fb_fd, gr_framebuffer);

     return gr_draw;
 }

 MinuiBackendOverlay::~MinuiBackendOverlay() {
     free_overlay(fb_fd);
     free_ion_mem();

     close(fb_fd);
     fb_fd = -1;

     if (!double_buffered && gr_draw) {
         free(gr_draw->data);
         free(gr_draw);
     }
     gr_draw = NULL;
     if (gr_framebuffer[0].data) {
         free(gr_framebuffer[0].data);
         gr_framebuffer[0].data = NULL;
     }
 }
 #else // MSM_BSP

 GRSurface* MinuiBackendOverlay::Flip() {
     return NULL;
 }

 GRSurface* MinuiBackendOverlay::Init() {
 	target_has_overlay(); // Don't care about return value, just for logging
     return NULL;
 }

 MinuiBackendOverlay::~MinuiBackendOverlay() {
     return;
 }
 #endif // MSM_BSP
	/*
	* 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>
	#else
	#define MSMFB_NEW_REQUEST 0
	#endif

	#include "graphics_overlay.h"

	#include "minui/minui.h"

	#define MDP_V4_0 400
	#define MAX_DISPLAY_DIM 2048
	#define ALIGN(x, align) (((x) + ((align)-1)) & ~((align)-1))

	MinuiBackendOverlay::MinuiBackendOverlay() :
	fb_fd(-1),
	isMDP5(false),
	leftSplit(0),
	rightSplit(0),
	frame_size(0),
	overlayL_id(MSMFB_NEW_REQUEST),
	overlayR_id(MSMFB_NEW_REQUEST) {}

	#ifdef MSM_BSP
	int MinuiBackendOverlay::map_mdp_pixel_format()
	{
	int format = MDP_RGB_565;
	#if defined(RECOVERY_BGRA)
	format = MDP_BGRA_8888;
	#elif defined(RECOVERY_RGBA)
	format = MDP_RGBA_8888;
	#elif defined(RECOVERY_RGBX)
	format = MDP_RGBA_8888;
	#endif
	return format;
	}

	static memInfo mem_info;

	#endif // MSM_BSP

	bool MinuiBackendOverlay::target_has_overlay()
	{
	int mdp_version;
	bool overlay_supported = false;
	fb_fix_screeninfo fi;
	int fd;

	fd = open("/dev/graphics/fb0", O_RDWR);
	if (fd < 0) {
	perror("open_overlay cannot open fb0");
	return false;
	}

	if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) {
	perror("failed to get fb0 info");
	close(fd);
	return false;
	}
	close(fd);

	if (strlen(fi.id) >= 8) {
	if(!strncmp(fi.id, "msmfb", strlen("msmfb"))) {
	char str_ver[4];
	memcpy(str_ver, fi.id + strlen("msmfb"), 3);
	str_ver[3] = '\0';
	mdp_version = atoi(str_ver);
	if (mdp_version >= MDP_V4_0) {
	overlay_supported = true;
	}
	} else if (!strncmp(fi.id, "mdssfb", strlen("mdssfb"))) {
	overlay_supported = true;
	isMDP5 = true;
	}
	}
	#ifndef MSM_BSP
	if (overlay_supported)
	printf("Overlay graphics may work (%s), but not enabled. Use TW_TARGET_USES_QCOM_BSP := true to enable.\n", fi.id);
	#endif
	return overlay_supported;
	}

	void MinuiBackendOverlay::Blank(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);
	#else
	int ret;

	ret = ioctl(fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK);
	if (ret < 0)
	perror("ioctl(): blank");
	#endif
	}

	void MinuiBackendOverlay::SetDisplayedFramebuffer(unsigned n)
	{
	if (n > 1 \|\| !double_buffered) return;

	vi.yres_virtual = gr_framebuffer[0].height * 2;
	vi.yoffset = n * gr_framebuffer[0].height;
	vi.bits_per_pixel = gr_framebuffer[0].pixel_bytes * 8;
	if (ioctl(fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) {
	perror("active fb swap failed");
	}
	displayed_buffer = n;
	}

	#ifdef MSM_BSP
	void MinuiBackendOverlay::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 MinuiBackendOverlay::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 MinuiBackendOverlay::getRightSplit(void) {
	return rightSplit;
	}

	int MinuiBackendOverlay::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 MinuiBackendOverlay::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 MinuiBackendOverlay::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 MinuiBackendOverlay::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[0].width, 32);
	overlayL.src.height = gr_fb[0].height;
	overlayL.src.format = map_mdp_pixel_format();
	overlayL.src_rect.w = gr_fb[0].width;
	overlayL.src_rect.h = gr_fb[0].height;
	overlayL.dst_rect.w = gr_fb[0].width;
	overlayL.dst_rect.h = gr_fb[0].height;
	overlayL.alpha = 0xFF;
	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[0].width * lSplitRatio;
	int lWidth = lSplit;
	int rWidth = gr_fb[0].width - lSplit;
	int height = gr_fb[0].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[0].width, 32);
	overlayL.src.height = gr_fb[0].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[0].height;
	overlayL.dst_rect.x = 0;
	overlayL.dst_rect.y = 0;
	overlayL.dst_rect.w = lWidth;
	overlayL.dst_rect.h = height;
	overlayL.alpha = 0xFF;
	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[0].width, 32);
	overlayR.src.height = gr_fb[0].height;
	overlayR.src.format = map_mdp_pixel_format();
	overlayR.src_rect.x = lCropWidth;
	overlayR.src_rect.y = 0;
	overlayR.src_rect.w = gr_fb[0].width - lCropWidth;
	overlayR.src_rect.h = gr_fb[0].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;
	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 MinuiBackendOverlay::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");
	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;
	}

	GRSurface* MinuiBackendOverlay::Flip() {
	if (double_buffered) {
	#if defined(RECOVERY_BGRA)
	// In case of BGRA, do some byte swapping
	unsigned int idx;
	unsigned char tmp;
	unsigned char* ucfb_vaddr = (unsigned char*)gr_draw->data;
	for (idx = 0 ; idx < (gr_draw->height * gr_draw->row_bytes);
	idx += 4) {
	tmp = ucfb_vaddr[idx];
	ucfb_vaddr[idx ] = ucfb_vaddr[idx + 2];
	ucfb_vaddr[idx + 2] = tmp;
	}
	#endif
	// 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;
	SetDisplayedFramebuffer(1-displayed_buffer);
	overlay_display_frame(fb_fd, gr_draw->data, frame_size);
	} else {
	// Copy from the in-memory surface to the framebuffer.
	overlay_display_frame(fb_fd, gr_draw->data, frame_size);
	}
	return gr_draw;
	}

	int MinuiBackendOverlay::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");
	overlayL_id = MSMFB_NEW_REQUEST;
	return ret;
	}
	}

	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;
	}

	GRSurface* MinuiBackendOverlay::Init() {
	gr_draw = NULL; // this should be in the constructor but 9.0 was throwing a compile error
	if (!target_has_overlay())
	return NULL;

	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);

	void* bits = malloc(vi.xres_virtual * vi.yres * (vi.bits_per_pixel / 8));
	if (bits == NULL) {
	perror("failed to malloc framebuffer");
	close(fd);
	return NULL;
	}

	memset(bits, 0, fi.smem_len);

	gr_framebuffer[0].width = vi.xres;
	gr_framebuffer[0].height = vi.yres;
	gr_framebuffer[0].row_bytes = fi.line_length;
	gr_framebuffer[0].pixel_bytes = vi.bits_per_pixel / 8;
	gr_framebuffer[0].data = reinterpret_cast<uint8_t*>(bits);
	memset(gr_framebuffer[0].data, 0, gr_framebuffer[0].height * gr_framebuffer[0].row_bytes);

	/* check if we can use double buffering */
	if (vi.yres * fi.line_length * 2 <= fi.smem_len) {
	double_buffered = true;
	printf("double buffered.\n");
	memcpy(gr_framebuffer+1, gr_framebuffer, sizeof(GRSurface));
	gr_framebuffer[1].data = gr_framebuffer[0].data +
	gr_framebuffer[0].height * gr_framebuffer[0].row_bytes;

	gr_draw = gr_framebuffer+1;

	} else {
	double_buffered = false;
	printf("single buffered.\n");
	// Without double-buffering, we allocate RAM for a buffer to
	// draw in, and then "flipping" the buffer consists of a
	// memcpy from the buffer we allocated to the framebuffer.

	gr_draw = (GRSurface*) malloc(sizeof(GRSurface));
	if (gr_draw == NULL) {
	printf("Failed to malloc gr_draw for single buffering.\n");
	return NULL;
	} else {
	memcpy(gr_draw, gr_framebuffer, sizeof(GRSurface));
	gr_draw->data = (unsigned char) malloc(gr_draw->height gr_draw->row_bytes);
	if (!gr_draw->data) {
	perror("failed to allocate in-memory surface");
	return NULL;
	}
	}
	}

	memset(gr_draw->data, 0, gr_draw->height * gr_draw->row_bytes);
	fb_fd = fd;
	SetDisplayedFramebuffer(0);

	frame_size = fi.line_length * vi.yres;

	printf("framebuffer: %d (%d x %d)\n", fb_fd, gr_draw->width, gr_draw->height);

	Blank(true);
	Blank(false);

	if (!alloc_ion_mem(fi.line_length * vi.yres))
	allocate_overlay(fb_fd, gr_framebuffer);

	return gr_draw;
	}

	MinuiBackendOverlay::~MinuiBackendOverlay() {
	free_overlay(fb_fd);
	free_ion_mem();

	close(fb_fd);
	fb_fd = -1;

	if (!double_buffered && gr_draw) {
	free(gr_draw->data);
	free(gr_draw);
	}
	gr_draw = NULL;
	if (gr_framebuffer[0].data) {
	free(gr_framebuffer[0].data);
	gr_framebuffer[0].data = NULL;
	}
	}
	#else // MSM_BSP

	GRSurface* MinuiBackendOverlay::Flip() {
	return NULL;
	}

	GRSurface* MinuiBackendOverlay::Init() {
	target_has_overlay(); // Don't care about return value, just for logging
	return NULL;
	}

	MinuiBackendOverlay::~MinuiBackendOverlay() {
	return;
	}
	#endif // MSM_BSP