[Miscellaneous Android Development] HypoTurtle:
Found this:

BOARD_KERNEL_CMDLINE = bootopt=64S3,32S1,32S1 [COLOR="Blue"]<=== that's MTK_ATF_BOOT_OPTION=0[/COLOR]

ifeq ($(strip $(MTK_ATF_BOOT_OPTION)), 1)
BOARD_KERNEL_CMDLINE = bootopt=64S3,32N2,32N2
endif
ifeq ($(strip $(MTK_ATF_BOOT_OPTION)), 2)
BOARD_KERNEL_CMDLINE = bootopt=64S3,32N2,64N2
endif

That's the cmdline used by the kernel/boot/recovery, with KK MTK_ATF_BOOT_OPTION=0; with LP it's 2.

I thought that perhaps ..._OPTION=1 was to indicate a 32-bit kernel; tried it with one of the recovery I have but not booting. Anyone know what the ATF stands for?

Also has anyone any experience with SP Driver Codegen or know if theres a datasheet on the mt6732 available anywhere.

Edit. I have TWRP compiling on Omni 5.0, just not booting yet. Using [MENTION=5186178]carliv[/MENTION]'s device as a base I had to change a few things other than the usual:

BoardConfig

# Copyright (C) 2013 The CyanogenMod 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.

LOCAL_PATH := device/elephone/p6000

USE_CAMERA_STUB := true

# inherit from the proprietary version
-include vendor/elephone/p6000/BoardConfigVendor.mk

TARGET_NO_BOOTLOADER := true
TARGET_BOOTLOADER_BOARD_NAME := p6000
TARGET_OTA_ASSERT_DEVICE := k01q_e

# Platform
TARGET_BOARD_PLATFORM := mt6752
TARGET_BOARD_PLATFORM_GPU := SGX351_110

# Architecture
TARGET_ARCH := arm
TARGET_CPU_ABI := armeabi-v7a
TARGET_CPU_ABI2 := armeabi
TARGET_CPU_ABI_LIST := armeabi-v7a,armeabi
TARGET_CPU_ABI_LIST_32_BIT := armeabi-v7a,armeabi
TARGET_ARCH_VARIANT := armv7-a-neon
TARGET_ARCH_VARIANT_CPU := cortex-a53
##TARGET_CPU_VARIANT:= cortex-a53 [COLOR="Red"]<==== This isn't supported on omni5.0[/COLOR]
TARGET_CPU_VARIANT:= generic

ARCH_ARM_HAVE_NEON := true
ARCH_ARM_HAVE_VFP := true
TARGET_CPU_SMP := true
ARCH_ARM_HAVE_TLS_REGISTER := true

TARGET_GLOBAL_CFLAGS += -mfpu=neon -mfloat-abi=softfp
TARGET_GLOBAL_CPPFLAGS += -mfpu=neon -mfloat-abi=softfp

BOARD_HAS_NO_SELECT_BUTTON := true

TARGET_BOOTLOADER_BOARD_NAME := k01q_e

WITH_DEXPREOPT := true

BOARD_KERNEL_CMDLINE := bootopt=64S3,32N2,64N2 [COLOR="navy"]<=== Changed to bootopt from LP[/COLOR]
BOARD_KERNEL_BASE = 0x40000000
BOARD_KERNEL_PAGESIZE := 2048
BOARD_MKBOOTIMG_ARGS := --base 0x40000000 --pagesize 2048 --kernel_offset 0x00008000 --ramdisk_offset 0x04000000 --tags_offset 0x0e000000 --board Elephone_P6000_ --cmdline bootopt=64S3,32N2,64N2

# Partition sizes [COLOR="Navy"]<==== changed to values from LP betav3[/COLOR]
BOARD_BOOTIMAGE_PARTITION_SIZE := 16777216
BOARD_RECOVERYIMAGE_PARTITION_SIZE := 16777216
##BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1375731712
##BOARD_USERDATAIMAGE_PARTITION_SIZE := 13670809600
##BOARD_CACHEIMAGE_PARTITION_SIZE := 117440512
BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1182793728
BOARD_USERDATAIMAGE_PARTITION_SIZE := 13536591872
BOARD_CACHEIMAGE_PARTITION_SIZE := 444596224
BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
BOARD_FLASH_BLOCK_SIZE := 512
TARGET_USERIMAGES_USE_EXT4 := true
TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
BOARD_HAS_LARGE_FILESYSTEM := true

# Recovery
#RECOVERY_VARIANT := cwm
#RECOVERY_VARIANT := carliv
#RECOVERY_VARIANT := philz
#RECOVERY_VARIANT := cm
TARGET_PREBUILT_KERNEL := $(LOCAL_PATH)/prebuilt/kernel
#TARGET_RECOVERY_INITRC := $(LOCAL_PATH)/recovery/recovery.cwm.rc
#TARGET_RECOVERY_FSTAB := $(LOCAL_PATH)/recovery/recovery.fstab

BOARD_CUSTOM_BOOTIMG_MK := $(LOCAL_PATH)/mkmtkbootimg.mk

BOARD_USE_CUSTOM_RECOVERY_FONT := \"roboto_23x41.h\"
DEVICE_RESOLUTION := 720x1280
DEVICE_SCREEN_WIDTH := 720
DEVICE_SCREEN_HEIGHT := 1280
TARGET_USE_CUSTOM_LUN_FILE_PATH := /sys/devices/virtual/android_usb/android0/f_mass_storage/lun%d/file
TARGET_RECOVERY_LCD_BACKLIGHT_PATH := \"/sys/class/leds/lcd-backlight/brightness\"
BRIGHTNESS_SYS_FILE := "/sys/class/leds/lcd-backlight/brightness"

# EGL settings
BOARD_EGL_CFG := $(LOCAL_PATH)/egl.cfg
USE_OPENGL_RENDERER := true
TARGET_RECOVERY_PIXEL_FORMAT := "RGBA_8888"
BOARD_USE_FRAMEBUFFER_ALPHA_CHANNEL := true
TARGET_DISABLE_TRIPLE_BUFFERING := false
#BOARD_CUSTOM_GRAPHICS := ../../../device/elephone/p6000/recovery/graphics.twrp.c

#TWRP
RECOVERY_VARIANT := twrp
TARGET_RECOVERY_INITRC := $(LOCAL_PATH)/recovery/recovery.twrp.rc
TARGET_RECOVERY_FSTAB := $(LOCAL_PATH)/recovery/recovery.twrp.fstab
TW_BOARD_CUSTOM_GRAPHICS := ../../../device/elephone/p6000/recovery/graphics.twrp.c
TW_BRIGHTNESS_PATH := /sys/class/leds/lcd-backlight/brightness
TW_CUSTOM_BATTERY_PATH := /sys/devices/platform/battery/power_supply/battery
TW_CUSTOM_CPU_TEMP_PATH := /sys/devices/virtual/thermal/thermal_zone1/temp
TW_USE_MODEL_HARDWARE_ID_FOR_DEVICE_ID := true
RECOVERY_GRAPHICS_USE_LINELENGTH := true
RECOVERY_SDCARD_ON_DATA := true
TW_USE_TOOLBOX := true
TWHAVE_SELINUX := true
TW_MAX_BRIGHTNESS := 255
TW_FLASH_FROM_STORAGE := true
TW_INCLUDE_L_CRYPTO := true
TW_CRYPTO_FS_TYPE := "ext4"
TW_CRYPTO_REAL_BLKDEV := "/dev/block/platform/mtk-msdc.0/by-name/userdata"
TW_CRYPTO_MNT_POINT := "/data"
TW_CRYPTO_FS_OPTIONS := "nosuid,nodev,noatime,discard,noauto_da_alloc,data=ordered"
TW_CRYPTO_FS_FLAGS := "0x02460000"

graphics.twrp.c

/*
* Copyright (C) 2007 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.
* - this is a file created by Carliv from xdaforums.com, by modifying
* the stock twrp recovery file, in order to support the mt6596 platforms 32 bits
* framebuffer.
*/

#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>

#include <errno.h>
#include <fcntl.h>
#include <stdio.h>

#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/types.h>

#include <linux/fb.h>
#include <linux/kd.h>

#include <pixelflinger/pixelflinger.h>

#include "minui.h"

#ifdef BOARD_USE_CUSTOM_RECOVERY_FONT
#include BOARD_USE_CUSTOM_RECOVERY_FONT
#else
#include "roboto_23x41.h"
#endif

#define PIXEL_FORMAT GGL_PIXEL_FORMAT_RGBA_8888
#define PIXEL_SIZE 4

#ifdef RECOVERY_BGRA
#define PIXEL_FORMAT GGL_PIXEL_FORMAT_BGRA_8888
#define PIXEL_SIZE 4
#endif
#ifdef RECOVERY_RGBX
#define PIXEL_FORMAT GGL_PIXEL_FORMAT_RGBX_8888
#define PIXEL_SIZE 4
#endif
#ifndef PIXEL_FORMAT
#define PIXEL_FORMAT GGL_PIXEL_FORMAT_RGB_565
#define PIXEL_SIZE 2
#endif

#define NUM_BUFFERS 2
#define MAX_DISPLAY_DIM 2048

// #define PRINT_SCREENINFO 1 // Enables printing of screen info to log

typedef struct {
int type;
GGLSurface texture;
unsigned offset[97];
unsigned cheight;
unsigned ascent;
} GRFont;

static GRFont *gr_font = 0;
static GGLContext *gr_context = 0;
static GGLSurface gr_font_texture;
static GGLSurface gr_framebuffer[NUM_BUFFERS];
GGLSurface gr_mem_surface;
static unsigned gr_active_fb = 0;
static unsigned double_buffering = 0;
static int gr_is_curr_clr_opaque = 0;

static int gr_fb_fd = -1;
static int gr_vt_fd = -1;

struct fb_var_screeninfo vi;
static struct fb_fix_screeninfo fi;

static bool has_overlay = false;
static int leftSplit = 0;
static int rightSplit = 0;

bool target_has_overlay(char *version);
int free_ion_mem(void);
int alloc_ion_mem(unsigned int size);
int allocate_overlay(int fd, GGLSurface gr_fb[]);
int free_overlay(int fd);
int overlay_display_frame(int fd, GGLubyte* data, size_t size);

#ifdef PRINT_SCREENINFO
static void print_fb_var_screeninfo()
{
printf("vi.xres: %d\n", vi.xres);
printf("vi.yres: %d\n", vi.yres);
printf("vi.xres_virtual: %d\n", vi.xres_virtual);
printf("vi.yres_virtual: %d\n", vi.yres_virtual);
printf("vi.xoffset: %d\n", vi.xoffset);
printf("vi.yoffset: %d\n", vi.yoffset);
printf("vi.bits_per_pixel: %d\n", vi.bits_per_pixel);
printf("vi.grayscale: %d\n", vi.grayscale);
}
#endif

#ifdef MSM_BSP
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;
}

void setDisplaySplit(void) {
char split[64] = {0};
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);
}

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 getFbXres(void) {
return vi.xres;
}

int getFbYres (void) {
return vi.yres;
}
#endif // MSM_BSP

static int get_framebuffer(GGLSurface *fb)
{
int fd;
void *bits;

fd = open("/dev/graphics/fb0", O_RDWR);
if (fd < 0) {
perror("cannot open fb0");
return -1;
}

if (ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) {
perror("failed to get fb0 info");
close(fd);
return -1;
}

fprintf(stderr, "Pixel format: %dx%d @ %dbpp\n", vi.xres, vi.yres, vi.bits_per_pixel);

if (vi.bits_per_pixel != 32)
vi.bits_per_pixel = 32;
if (PIXEL_FORMAT == GGL_PIXEL_FORMAT_BGRA_8888) {
fprintf(stderr, "Pixel format: BGRA_8888\n");
if (PIXEL_SIZE != 4) fprintf(stderr, "E: Pixel Size mismatch!\n");
vi.red.offset = 8;
vi.red.length = 8;
vi.green.offset = 16;
vi.green.length = 8;
vi.blue.offset = 24;
vi.blue.length = 8;
vi.transp.offset = 0;
vi.transp.length = 8;
} else if (PIXEL_FORMAT == GGL_PIXEL_FORMAT_RGBA_8888) {
fprintf(stderr, "Pixel format: RGBA_8888\n");
if (PIXEL_SIZE != 4) fprintf(stderr, "E: Pixel Size mismatch!\n");
vi.transp.offset = 24;
vi.transp.length = 8;
vi.red.offset = 0;
vi.red.length = 8;
vi.green.offset = 8;
vi.green.length = 8;
vi.blue.offset = 16;
vi.blue.length = 8;
vi.transp.offset = 0;
vi.transp.length = 8;
} else if (PIXEL_FORMAT == GGL_PIXEL_FORMAT_RGB_565) {
#ifdef RECOVERY_RGB_565
fprintf(stderr, "Pixel format: RGB_565\n");
vi.blue.offset = 0;
vi.green.offset = 5;
vi.red.offset = 11;
#else
fprintf(stderr, "Pixel format: BGR_565\n");
vi.blue.offset = 11;
vi.green.offset = 5;
vi.red.offset = 0;
#endif
if (PIXEL_SIZE != 2) fprintf(stderr, "E: Pixel Size mismatch!\n");
vi.blue.length = 5;
vi.green.length = 6;
vi.red.length = 5;
vi.blue.msb_right = 0;
vi.green.msb_right = 0;
vi.red.msb_right = 0;
vi.transp.offset = 0;
vi.transp.length = 0;
}
else
{
perror("unknown pixel format");
close(fd);
return -1;
}

vi.vmode = FB_VMODE_NONINTERLACED;
vi.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;

if (ioctl(fd, FBIOPUT_VSCREENINFO, &vi) < 0) {
perror("failed to put fb0 info");
close(fd);
return -1;
}

if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) {
perror("failed to get fb0 info");
close(fd);
return -1;
}

#ifdef MSM_BSP
has_overlay = target_has_overlay(fi.id);

if (isTargetMdp5())
setDisplaySplit();
#else
has_overlay = false;
#endif

if (!has_overlay) {
printf("Not using qualcomm overlay, '%s'\n", fi.id);
bits = mmap(0, fi.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (bits == MAP_FAILED) {
perror("failed to mmap framebuffer");
close(fd);
return -1;
}
} else {
printf("Using qualcomm overlay\n");
}

#ifdef RECOVERY_GRAPHICS_USE_LINELENGTH
vi.xres_virtual = fi.line_length / PIXEL_SIZE;
#endif

fb->version = sizeof(*fb);
fb->width = vi.xres;
fb->height = vi.yres;
#ifdef BOARD_HAS_JANKY_BACKBUFFER
printf("setting JANKY BACKBUFFER\n");
fb->stride = fi.line_length/2;
#else
fb->stride = vi.xres_virtual;
#endif
fb->format = PIXEL_FORMAT;
if (!has_overlay) {
fb->data = bits;
memset(fb->data, 0, vi.yres * fb->stride * PIXEL_SIZE);
}

fb++;

/* check if we can use double buffering */
if (vi.yres * fi.line_length * 2 > fi.smem_len)
return fd;

double_buffering = 1;

fb->version = sizeof(*fb);
fb->width = vi.xres;
fb->height = vi.yres;
#ifdef BOARD_HAS_JANKY_BACKBUFFER
fb->stride = fi.line_length/2;
fb->data = (GGLubyte*) (((unsigned long) bits) + vi.yres * fi.line_length);
#else
fb->stride = vi.xres_virtual;
fb->data = (GGLubyte*) (((unsigned long) bits) + vi.yres * fb->stride * PIXEL_SIZE);
#endif
fb->format = PIXEL_FORMAT;
if (!has_overlay) {
memset(fb->data, 0, vi.yres * fb->stride * PIXEL_SIZE);
}

#ifdef PRINT_SCREENINFO
print_fb_var_screeninfo();
#endif

return fd;
}

static void get_memory_surface(GGLSurface* ms) {
ms->version = sizeof(*ms);
ms->width = vi.xres;
ms->height = vi.yres;
ms->stride = vi.xres_virtual;
ms->data = malloc(vi.xres_virtual * vi.yres * PIXEL_SIZE);
ms->format = PIXEL_FORMAT;
}

static void set_active_framebuffer(unsigned n)
{
if (n > 1 || !double_buffering) return;
vi.yres_virtual = vi.yres * NUM_BUFFERS;
vi.yoffset = n * vi.yres;
// vi.bits_per_pixel = PIXEL_SIZE * 8;
if (ioctl(gr_fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) {
perror("active fb swap failed");
}
}

void gr_flip(void)
{
if (-EINVAL == overlay_display_frame(gr_fb_fd, gr_mem_surface.data,
(fi.line_length * vi.yres))) {
GGLContext *gl = gr_context;

/* swap front and back buffers */
if (double_buffering)
gr_active_fb = (gr_active_fb + 1) & 1;

#ifdef BOARD_HAS_FLIPPED_SCREEN
/* flip buffer 180 degrees for devices with physicaly inverted screens */
unsigned int i;
unsigned int j;
for (i = 0; i < vi.yres; i++) {
for (j = 0; j < vi.xres; j++) {
memcpy(gr_framebuffer[gr_active_fb].data + (i * vi.xres_virtual + j) * PIXEL_SIZE,
gr_mem_surface.data + ((vi.yres - i - 1) * vi.xres_virtual + vi.xres - j - 1) * PIXEL_SIZE, PIXEL_SIZE);
}
}
#else
/* copy data from the in-memory surface to the buffer we're about
* to make active. */
memcpy(gr_framebuffer[gr_active_fb].data, gr_mem_surface.data,
vi.xres_virtual * vi.yres * PIXEL_SIZE);
#endif

/* inform the display driver */
set_active_framebuffer(gr_active_fb);
}
}

void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
{
GGLContext *gl = gr_context;
GGLint color[4];
color[0] = ((r << 8) | r) + 1;
color[1] = ((g << 8) | g) + 1;
color[2] = ((b << 8) | b) + 1;
color[3] = ((a << 8) | a) + 1;
gl->color4xv(gl, color);

gr_is_curr_clr_opaque = (a == 255);
}

int gr_measureEx(const char *s, void* font)
{
GRFont* fnt = (GRFont*) font;
int total = 0;
unsigned pos;
unsigned off;

if (!fnt) fnt = gr_font;

#ifndef TW_DISABLE_TTF
if(fnt->type == FONT_TYPE_TTF)
return gr_ttf_measureEx(s, font);
#endif

while ((off = *s++))
{
off -= 32;
if (off < 96)
total += (fnt->offset[off+1] - fnt->offset[off]);
}
return total;
}

int gr_maxExW(const char *s, void* font, int max_width)
{
GRFont* fnt = (GRFont*) font;
int total = 0;
unsigned pos;
unsigned off;

if (!fnt) fnt = gr_font;

#ifndef TW_DISABLE_TTF
if(fnt->type == FONT_TYPE_TTF)
return gr_ttf_maxExW(s, font, max_width);
#endif

while ((off = *s++))
{
off -= 32;
if (off < 96) {
max_width -= (fnt->offset[off+1] - fnt->offset[off]);
if (max_width > 0) {
total++;
} else {
return total;
}
}
}
return total;
}

int gr_textEx(int x, int y, const char *s, void* pFont)
{
GGLContext *gl = gr_context;
GRFont *font = (GRFont*) pFont;
unsigned off;
unsigned cwidth;

/* Handle default font */
if (!font) font = gr_font;

#ifndef TW_DISABLE_TTF
if(font->type == FONT_TYPE_TTF)
return gr_ttf_textExWH(gl, x, y, s, pFont, -1, -1);
#endif

gl->bindTexture(gl, &font->texture);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);

while((off = *s++)) {
off -= 32;
cwidth = 0;
if (off < 96) {
cwidth = font->offset[off+1] - font->offset[off];
gl->texCoord2i(gl, (font->offset[off]) - x, 0 - y);
gl->recti(gl, x, y, x + cwidth, y + font->cheight);
x += cwidth;
}
}

gl->disable(gl, GGL_TEXTURE_2D);

return x;
}

int gr_textExW(int x, int y, const char *s, void* pFont, int max_width)
{
GGLContext *gl = gr_context;
GRFont *font = (GRFont*) pFont;
unsigned off;
unsigned cwidth;

/* Handle default font */
if (!font) font = gr_font;

#ifndef TW_DISABLE_TTF
if(font->type == FONT_TYPE_TTF)
return gr_ttf_textExWH(gl, x, y, s, pFont, max_width, -1);
#endif

gl->bindTexture(gl, &font->texture);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);

while((off = *s++)) {
off -= 32;
cwidth = 0;
if (off < 96) {
cwidth = font->offset[off+1] - font->offset[off];
if ((x + (int)cwidth) < max_width) {
gl->texCoord2i(gl, (font->offset[off]) - x, 0 - y);
gl->recti(gl, x, y, x + cwidth, y + font->cheight);
x += cwidth;
} else {
gl->texCoord2i(gl, (font->offset[off]) - x, 0 - y);
gl->recti(gl, x, y, max_width, y + font->cheight);
x = max_width;
return x;
}
}
}

gl->disable(gl, GGL_TEXTURE_2D);

return x;
}

int gr_textExWH(int x, int y, const char *s, void* pFont, int max_width, int max_height)
{
GGLContext *gl = gr_context;
GRFont *font = (GRFont*) pFont;
unsigned off;
unsigned cwidth;
int rect_x, rect_y;

/* Handle default font */
if (!font) font = gr_font;

#ifndef TW_DISABLE_TTF
if(font->type == FONT_TYPE_TTF)
return gr_ttf_textExWH(gl, x, y, s, pFont, max_width, max_height);
#endif

gl->bindTexture(gl, &font->texture);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);

while((off = *s++)) {
off -= 32;
cwidth = 0;
if (off < 96) {
cwidth = font->offset[off+1] - font->offset[off];
if ((x + (int)cwidth) < max_width)
rect_x = x + cwidth;
else
rect_x = max_width;
if (y + font->cheight < (unsigned int)(max_height))
rect_y = y + font->cheight;
else
rect_y = max_height;

gl->texCoord2i(gl, (font->offset[off]) - x, 0 - y);
gl->recti(gl, x, y, rect_x, rect_y);
x += cwidth;
if (x > max_width)
return x;
}
}

gl->disable(gl, GGL_TEXTURE_2D);

return x;
}

void gr_clip(int x, int y, int w, int h)
{
GGLContext *gl = gr_context;
gl->scissor(gl, x, y, w, h);
gl->enable(gl, GGL_SCISSOR_TEST);
}

void gr_noclip()
{
GGLContext *gl = gr_context;
gl->scissor(gl, 0, 0, gr_fb_width(), gr_fb_height());
gl->disable(gl, GGL_SCISSOR_TEST);
}

void gr_fill(int x, int y, int w, int h)
{
GGLContext *gl = gr_context;

if(gr_is_curr_clr_opaque)
gl->disable(gl, GGL_BLEND);

gl->recti(gl, x, y, x + w, y + h);

if(gr_is_curr_clr_opaque)
gl->enable(gl, GGL_BLEND);
}

void gr_line(int x0, int y0, int x1, int y1, int width)
{
GGLContext *gl = gr_context;

if(gr_is_curr_clr_opaque)
gl->disable(gl, GGL_BLEND);

const int coords0[2] = { x0 << 4, y0 << 4 };
const int coords1[2] = { x1 << 4, y1 << 4 };
gl->linex(gl, coords0, coords1, width << 4);

if(gr_is_curr_clr_opaque)
gl->enable(gl, GGL_BLEND);
}

gr_surface gr_render_circle(int radius, unsigned char r, unsigned char g, unsigned char b, unsigned char a)
{
int rx, ry;
GGLSurface *surface;
const int diameter = radius*2 + 1;
const int radius_check = radius*radius + radius*0.8;
const uint32_t px = (a << 24) | (b << 16) | (g << 8) | r;
uint32_t *data;

surface = malloc(sizeof(GGLSurface));
memset(surface, 0, sizeof(GGLSurface));

data = malloc(diameter * diameter * 4);
memset(data, 0, diameter * diameter * 4);

surface->version = sizeof(surface);
surface->width = diameter;
surface->height = diameter;
surface->stride = diameter;
surface->data = (GGLubyte*)data;
surface->format = GGL_PIXEL_FORMAT_RGBA_8888;

for(ry = -radius; ry <= radius; ++ry)
for(rx = -radius; rx <= radius; ++rx)
if(rx*rx+ry*ry <= radius_check)
*(data + diameter*(radius + ry) + (radius+rx)) = px;

return surface;
}

void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy) {
if (gr_context == NULL) {
return;
}

GGLContext *gl = gr_context;
GGLSurface *surface = (GGLSurface*)source;

if(surface->format == GGL_PIXEL_FORMAT_RGBX_8888)
gl->disable(gl, GGL_BLEND);

gl->bindTexture(gl, surface);
gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
gl->enable(gl, GGL_TEXTURE_2D);
gl->texCoord2i(gl, sx - dx, sy - dy);
gl->recti(gl, dx, dy, dx + w, dy + h);
gl->disable(gl, GGL_TEXTURE_2D);

if(surface->format == GGL_PIXEL_FORMAT_RGBX_8888)
gl->enable(gl, GGL_BLEND);
}

unsigned int gr_get_width(gr_surface surface) {
if (surface == NULL) {
return 0;
}
return ((GGLSurface*) surface)->width;
}

unsigned int gr_get_height(gr_surface surface) {
if (surface == NULL) {
return 0;
}
return ((GGLSurface*) surface)->height;
}

void* gr_loadFont(const char* fontName)
{
int fd;
GRFont *font = 0;
GGLSurface *ftex;
unsigned char *bits, *rle;
unsigned char *in, data;
unsigned width, height;
unsigned element;

fd = open(fontName, O_RDONLY);
if (fd == -1)
{
char tmp[128];

sprintf(tmp, TWRES "fonts/%s.dat", fontName);
fd = open(tmp, O_RDONLY);
if (fd == -1)
return NULL;
}

font = calloc(sizeof(*font), 1);
ftex = &font->texture;

read(fd, &width, sizeof(unsigned));
read(fd, &height, sizeof(unsigned));
read(fd, font->offset, sizeof(unsigned) * 96);
font->offset[96] = width;

bits = malloc(width * height);
memset(bits, 0, width * height);

unsigned pos = 0;
while (pos < width * height)
{
int bit;

read(fd, &data, 1);
for (bit = 0; bit < 8; bit++)
{
if (data & (1 << (7-bit))) bits[pos++] = 255;
else bits[pos++] = 0;

if (pos == width * height) break;
}
}
close(fd);

ftex->version = sizeof(*ftex);
ftex->width = width;
ftex->height = height;
ftex->stride = width;
ftex->data = (void*) bits;
ftex->format = GGL_PIXEL_FORMAT_A_8;
font->type = FONT_TYPE_TWRP;
font->cheight = height;
font->ascent = height - 2;
return (void*) font;
}

void gr_freeFont(void *font)
{
GRFont *f = font;
free(f->texture.data);
free(f);
}

int gr_getMaxFontHeight(void *font)
{
GRFont *fnt = (GRFont*) font;

if (!fnt) fnt = gr_font;
if (!fnt) return -1;

#ifndef TW_DISABLE_TTF
if(fnt->type == FONT_TYPE_TTF)
return gr_ttf_getMaxFontHeight(font);
#endif

return fnt->cheight;
}

static void gr_init_font(void)
{
int fontRes;
GGLSurface *ftex;
unsigned char *bits, *rle;
unsigned char *in, data;
unsigned width, height;
unsigned element;

gr_font = calloc(sizeof(*gr_font), 1);
ftex = &gr_font->texture;

width = font.width;
height = font.height;

bits = malloc(width * height);
rle = bits;

in = font.rundata;
while((data = *in++))
{
memset(rle, (data & 0x80) ? 255 : 0, data & 0x7f);
rle += (data & 0x7f);
}
for (element = 0; element < 97; element++)
{
gr_font->offset[element] = (element * font.cwidth);
}

ftex->version = sizeof(*ftex);
ftex->width = width;
ftex->height = height;
ftex->stride = width;
ftex->data = (void*) bits;
ftex->format = GGL_PIXEL_FORMAT_A_8;
gr_font->type = FONT_TYPE_TWRP;
gr_font->cheight = height;
gr_font->ascent = height - 2;
return;
}

int gr_init(void)
{
gglInit(&gr_context);
GGLContext *gl = gr_context;

gr_init_font();
gr_vt_fd = open("/dev/tty0", O_RDWR | O_SYNC);
if (gr_vt_fd < 0) {
// This is non-fatal; post-Cupcake kernels don't have tty0.
} else if (ioctl(gr_vt_fd, KDSETMODE, (void*) KD_GRAPHICS)) {
// However, if we do open tty0, we expect the ioctl to work.
perror("failed KDSETMODE to KD_GRAPHICS on tty0");
gr_exit();
return -1;
}

gr_fb_fd = get_framebuffer(gr_framebuffer);
if (gr_fb_fd < 0) {
perror("Unable to get framebuffer.\n");
gr_exit();
return -1;
}

get_memory_surface(&gr_mem_surface);

fprintf(stderr, "framebuffer: fd %d (%d x %d)\n",
gr_fb_fd, gr_framebuffer[0].width, gr_framebuffer[0].height);

/* start with 0 as front (displayed) and 1 as back (drawing) */
gr_active_fb = 0;
if (!has_overlay)
set_active_framebuffer(0);
gl->colorBuffer(gl, &gr_mem_surface);

gl->activeTexture(gl, 0);
gl->enable(gl, GGL_BLEND);
gl->blendFunc(gl, GGL_SRC_ALPHA, GGL_ONE_MINUS_SRC_ALPHA);

#ifdef TW_SCREEN_BLANK_ON_BOOT
printf("TW_SCREEN_BLANK_ON_BOOT := true\n");
gr_fb_blank(true);
gr_fb_blank(false);
#endif

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

return 0;
}

void gr_exit(void)
{
free_overlay(gr_fb_fd);
free_ion_mem();

close(gr_fb_fd);
gr_fb_fd = -1;

free(gr_mem_surface.data);

ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT);
close(gr_vt_fd);
gr_vt_fd = -1;
}

int gr_fb_width(void)
{
return gr_framebuffer[0].width;
}

int gr_fb_height(void)
{
return gr_framebuffer[0].height;
}

gr_pixel *gr_fb_data(void)
{
return (unsigned short *) gr_mem_surface.data;
}

int gr_fb_blank(int blank)
{
int ret;
//if (blank)
//free_overlay(gr_fb_fd);

ret = ioctl(gr_fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK);
if (ret < 0)
perror("ioctl(): blank");

//if (!blank)
//allocate_overlay(gr_fb_fd, gr_framebuffer);
return ret;
}

int gr_get_surface(gr_surface* surface)
{
GGLSurface* ms = malloc(sizeof(GGLSurface));
if (!ms) return -1;

// Allocate the data
get_memory_surface(ms);

// Now, copy the data
memcpy(ms->data, gr_mem_surface.data, vi.xres * vi.yres * vi.bits_per_pixel / 8);

*surface = (gr_surface*) ms;
return 0;
}

int gr_free_surface(gr_surface surface)
{
if (!surface)
return -1;

GGLSurface* ms = (GGLSurface*) surface;
free(ms->data);
free(ms);
return 0;
}

void gr_write_frame_to_file(int fd)
{
write(fd, gr_mem_surface.data, vi.xres * vi.yres * vi.bits_per_pixel / 8);
}

Could use a heads up if this is likely to boot... currently the compiled recovery boot loops and repacking the LP cwm with the compiled ramdisk results in a stalled boot.