minuitwrp/graphics.cpp - android_bootable_recovery - Gitiles

 /*
  * 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.
  */

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

 #include <cutils/properties.h>
 #include <pixelflinger/pixelflinger.h>
 #include "../gui/placement.h"
 #include "minui.h"
 #include "graphics.h"
 // For std::min and std::max
 #include <algorithm>
 #include "truetype.hpp"

 struct GRFont {
     GRSurface* texture;
     int cwidth;
     int cheight;
 };

 static minui_backend* gr_backend = NULL;

 static int overscan_percent = OVERSCAN_PERCENT;
 static int overscan_offset_x = 0;
 static int overscan_offset_y = 0;

 static unsigned char gr_current_r = 255;
 static unsigned char gr_current_g = 255;
 static unsigned char gr_current_b = 255;

 GRSurface* gr_draw = NULL;

 static GGLContext *gr_context = 0;
 GGLSurface gr_mem_surface;
 static int gr_is_curr_clr_opaque = 0;

 unsigned int gr_rotation = 0;

 int gr_textEx_scaleW(int x, int y, const char *s, void* pFont, int max_width, int placement, int scale)
 {
     GGLContext *gl = gr_context;
     void* vfont = pFont;
     GRFont *font = (GRFont*) pFont;
     int y_scale = 0, measured_width, measured_height, new_height;

     if (!s || strlen(s) == 0 || !font)
         return 0;

     measured_height = twrpTruetype::gr_ttf_getMaxFontHeight(font);

     if (scale) {
         measured_width = twrpTruetype::gr_ttf_measureEx(s, vfont);
         if (measured_width > max_width) {
             // Adjust font size down until the text fits
             void *new_font = twrpTruetype::gr_ttf_scaleFont(vfont, max_width, measured_width);
             if (!new_font) {
                 printf("gr_textEx_scaleW new_font is NULL\n");
                 return 0;
             }
             measured_width = twrpTruetype::gr_ttf_measureEx(s, new_font);
             // These next 2 lines adjust the y point based on the new font's height
             new_height = twrpTruetype::gr_ttf_getMaxFontHeight(new_font);
             y_scale = (measured_height - new_height) / 2;
             vfont = new_font;
         }
     } else
         measured_width = twrpTruetype::gr_ttf_measureEx(s, vfont);

     int x_adj = measured_width;
     if (measured_width > max_width)
         x_adj = max_width;

     if (placement != TOP_LEFT && placement != BOTTOM_LEFT && placement != TEXT_ONLY_RIGHT) {
         if (placement == CENTER || placement == CENTER_X_ONLY)
             x -= (x_adj / 2);
         else
             x -= x_adj;
     }

     if (placement != TOP_LEFT && placement != TOP_RIGHT) {
         if (placement == CENTER || placement == TEXT_ONLY_RIGHT)
             y -= (measured_height / 2);
         else if (placement == BOTTOM_LEFT || placement == BOTTOM_RIGHT)
             y -= measured_height;
     }
     return twrpTruetype::gr_ttf_textExWH(gl, x, y + y_scale, s, vfont, measured_width + x, -1, gr_draw);
 }

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

     switch (gr_rotation) {
         case 90:
             gl->scissor(gl, gr_draw->width - y - h, x, h, w);
             break;
         case 180:
             gl->scissor(gl, gr_draw->width - x - w, gr_draw->height - y - h, w, h);
             break;
         case 270:
             gl->scissor(gl, y, gr_draw->height - x - w, h, w);
             break;
         default:
             gl->scissor(gl, x, y, w, h);
             break;
     }
     gl->enable(gl, GGL_SCISSOR_TEST);
 }

 void gr_noclip()
 {
     GGLContext *gl = gr_context;
     gl->scissor(gl, 0, 0,
                 gr_draw->width - 2 * overscan_offset_x,
                 gr_draw->height - 2 * overscan_offset_y);
     gl->disable(gl, GGL_SCISSOR_TEST);
 }

 void gr_line(int x0, int y0, int x1, int y1, int width)
 {
     GGLContext *gl = gr_context;
     int x0_disp, y0_disp, x1_disp, y1_disp;

     x0_disp = ROTATION_X_DISP(x0, y0, gr_draw->width);
     y0_disp = ROTATION_Y_DISP(x0, y0, gr_draw->height);
     x1_disp = ROTATION_X_DISP(x1, y1, gr_draw->width);
     y1_disp = ROTATION_Y_DISP(x1, y1, gr_draw->height);

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

     const int coords0[2] = { x0_disp << 4, y0_disp << 4 };
     const int coords1[2] = { x1_disp << 4, y1_disp << 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 = (GGLSurface *)malloc(sizeof(GGLSurface));
     memset(surface, 0, sizeof(GGLSurface));

     data = (uint32_t *)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;
 #if defined(RECOVERY_BGRA)
     surface->format = GGL_PIXEL_FORMAT_BGRA_8888;
 #else
     surface->format = GGL_PIXEL_FORMAT_RGBA_8888;
 #endif

     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 (gr_surface)surface;
 }

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

     gr_is_curr_clr_opaque = (a == 255);
 }

 void gr_clear()
 {
     if (gr_draw->pixel_bytes == 2) {
         gr_fill(0, 0, gr_fb_width(), gr_fb_height());
         return;
     }

     // This code only works on 32bpp devices
     if (gr_current_r == gr_current_g && gr_current_r == gr_current_b) {
         memset(gr_draw->data, gr_current_r, gr_draw->height * gr_draw->row_bytes);
     } else {
         unsigned char* px = gr_draw->data;
         for (int y = 0; y < gr_draw->height; ++y) {
             for (int x = 0; x < gr_draw->width; ++x) {
                 *px++ = gr_current_r;
                 *px++ = gr_current_g;
                 *px++ = gr_current_b;
                 px++;
             }
             px += gr_draw->row_bytes - (gr_draw->width * gr_draw->pixel_bytes);
         }
     }
 }

 void gr_fill(int x, int y, int w, int h)
 {
     GGLContext *gl = gr_context;
     int x0_disp, y0_disp, x1_disp, y1_disp;
     int l_disp, r_disp, t_disp, b_disp;

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

     x0_disp = ROTATION_X_DISP(x, y, gr_draw->width);
     y0_disp = ROTATION_Y_DISP(x, y, gr_draw->height);
     x1_disp = ROTATION_X_DISP(x + w, y + h, gr_draw->width);
     y1_disp = ROTATION_Y_DISP(x + w, y + h, gr_draw->height);
     l_disp = std::min(x0_disp, x1_disp);
     r_disp = std::max(x0_disp, x1_disp);
     t_disp = std::min(y0_disp, y1_disp);
     b_disp = std::max(y0_disp, y1_disp);

     gl->recti(gl, l_disp, t_disp, r_disp, b_disp);

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

 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);

     int dx0_disp, dy0_disp, dx1_disp, dy1_disp;
     int l_disp, r_disp, t_disp, b_disp;

     // Figuring out display coordinates works for gr_rotation == 0 too,
     // and isn't as expensive as allocating and rotating another surface,
     // so we do this anyway.
     dx0_disp = ROTATION_X_DISP(dx, dy, gr_draw->width);
     dy0_disp = ROTATION_Y_DISP(dx, dy, gr_draw->height);
     dx1_disp = ROTATION_X_DISP(dx + w, dy + h, gr_draw->width);
     dy1_disp = ROTATION_Y_DISP(dx + w, dy + h, gr_draw->height);
     l_disp = std::min(dx0_disp, dx1_disp);
     r_disp = std::max(dx0_disp, dx1_disp);
     t_disp = std::min(dy0_disp, dy1_disp);
     b_disp = std::max(dy0_disp, dy1_disp);

     GGLSurface surface_rotated;
     if (gr_rotation != 0) {
         // Do not perform relatively expensive operation if not needed
         surface_rotated.version = sizeof(surface_rotated);
         // Skip the **(gr_rotation == 0)** || (gr_rotation == 180) check
         // because we are under a gr_rotation != 0 conditional compilation statement
         surface_rotated.width   = (gr_rotation == 180) ? surface->width  : surface->height;
         surface_rotated.height  = (gr_rotation == 180) ? surface->height : surface->width;
         surface_rotated.stride  = surface_rotated.width;
         surface_rotated.format  = surface->format;
         surface_rotated.data    = (GGLubyte*) malloc(surface_rotated.stride * surface_rotated.height * 4);
         surface_ROTATION_transform((gr_surface) &surface_rotated, (const gr_surface) surface, 4);

         gl->bindTexture(gl, &surface_rotated);
     } else {
         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 - l_disp, sy - t_disp);
     gl->recti(gl, l_disp, t_disp, r_disp, b_disp);
     gl->disable(gl, GGL_TEXTURE_2D);

     if (gr_rotation != 0)
         free(surface_rotated.data);

     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_flip() {
     gr_draw = gr_backend->flip(gr_backend);
     // On double buffered back ends, when we flip, we need to tell
     // pixel flinger to draw to the other buffer
     gr_mem_surface.data = (GGLubyte*)gr_draw->data;
     gr_context->colorBuffer(gr_context, &gr_mem_surface);
 }

 static void get_memory_surface(GGLSurface* ms) {
     ms->version = sizeof(*ms);
     ms->width = gr_draw->width;
     ms->height = gr_draw->height;
     ms->stride = gr_draw->row_bytes / gr_draw->pixel_bytes;
     ms->data = (GGLubyte*)gr_draw->data;
     ms->format = gr_draw->format;
 }

 int gr_init(void)
 {
     gr_draw = NULL;

     char gr_rotation_string[PROPERTY_VALUE_MAX];
     char default_rotation[4];
     snprintf(default_rotation, 4, "%d", TW_ROTATION);
     property_get("persist.twrp.rotation", gr_rotation_string, default_rotation);
     gr_rotation = atoi(gr_rotation_string);
     if (!(gr_rotation == 90 || gr_rotation == 180 || gr_rotation == 270))
         gr_rotation = 0;

 #ifdef MSM_BSP
     gr_backend = open_overlay();
     if (gr_backend) {
         gr_draw = gr_backend->init(gr_backend);
         if (!gr_draw) {
             gr_backend->exit(gr_backend);
         } else
             printf("Using overlay graphics.\n");
     }
 #endif

 #ifdef HAS_ADF
     if (!gr_backend || !gr_draw) {
         gr_backend = open_adf();
         if (gr_backend) {
             gr_draw = gr_backend->init(gr_backend);
             if (!gr_draw) {
                 gr_backend->exit(gr_backend);
             } else
                 printf("Using adf graphics.\n");
         }
     }
 #else
 #ifdef MSM_BSP
 	printf("Skipping adf graphics because TW_TARGET_USES_QCOM_BSP := true\n");
 #else
     printf("Skipping adf graphics -- not present in build tree\n");
 #endif
 #endif

 #ifdef HAS_DRM
     if (!gr_backend || !gr_draw) {
         gr_backend = open_drm();
         gr_draw = gr_backend->init(gr_backend);
         if (gr_draw)
             printf("Using drm graphics.\n");
     }
 #else
     printf("Skipping drm graphics -- not present in build tree\n");
 #endif

     if (!gr_backend || !gr_draw) {
         gr_backend = open_fbdev();
         gr_draw = gr_backend->init(gr_backend);
         if (gr_draw == NULL) {
             return -1;
         } else
             printf("Using fbdev graphics.\n");
     }

     overscan_offset_x = gr_draw->width * overscan_percent / 100;
     overscan_offset_y = gr_draw->height * overscan_percent / 100;

     // Set up pixelflinger
     get_memory_surface(&gr_mem_surface);
     gglInit(&gr_context);
     GGLContext *gl = gr_context;
     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);

     gr_flip();
     gr_flip();

     return 0;
 }

 void gr_exit(void)
 {
     gr_backend->exit(gr_backend);
 }

 int gr_fb_width(void)
 {
     return (gr_rotation == 0 || gr_rotation == 180) ?
             gr_draw->width  - 2 * overscan_offset_x :
             gr_draw->height - 2 * overscan_offset_y;
 }

 int gr_fb_height(void)
 {
     return (gr_rotation == 0 || gr_rotation == 180) ?
             gr_draw->height - 2 * overscan_offset_y :
             gr_draw->width  - 2 * overscan_offset_x;
 }

 void gr_fb_blank(bool blank)
 {
     gr_backend->blank(gr_backend, blank);
 }

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

     // Allocate the data
     get_memory_surface(ms);
     ms->data = (GGLubyte*)malloc(ms->stride * ms->height * gr_draw->pixel_bytes);

     // Now, copy the data
     memcpy(ms->data, gr_mem_surface.data, gr_draw->width * gr_draw->height * gr_draw->pixel_bytes / 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, gr_draw->width * gr_draw->height * gr_draw->pixel_bytes / 8);
 }
	/*
	* 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.
	*/

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

	#include <cutils/properties.h>
	#include <pixelflinger/pixelflinger.h>
	#include "../gui/placement.h"
	#include "minui.h"
	#include "graphics.h"
	// For std::min and std::max
	#include <algorithm>
	#include "truetype.hpp"

	struct GRFont {
	GRSurface* texture;
	int cwidth;
	int cheight;
	};

	static minui_backend* gr_backend = NULL;

	static int overscan_percent = OVERSCAN_PERCENT;
	static int overscan_offset_x = 0;
	static int overscan_offset_y = 0;

	static unsigned char gr_current_r = 255;
	static unsigned char gr_current_g = 255;
	static unsigned char gr_current_b = 255;

	GRSurface* gr_draw = NULL;

	static GGLContext *gr_context = 0;
	GGLSurface gr_mem_surface;
	static int gr_is_curr_clr_opaque = 0;

	unsigned int gr_rotation = 0;

	int gr_textEx_scaleW(int x, int y, const char s, void pFont, int max_width, int placement, int scale)
	{
	GGLContext *gl = gr_context;
	void* vfont = pFont;
	GRFont font = (GRFont) pFont;
	int y_scale = 0, measured_width, measured_height, new_height;

	if (!s \|\| strlen(s) == 0 \|\| !font)
	return 0;

	measured_height = twrpTruetype::gr_ttf_getMaxFontHeight(font);

	if (scale) {
	measured_width = twrpTruetype::gr_ttf_measureEx(s, vfont);
	if (measured_width > max_width) {
	// Adjust font size down until the text fits
	void *new_font = twrpTruetype::gr_ttf_scaleFont(vfont, max_width, measured_width);
	if (!new_font) {
	printf("gr_textEx_scaleW new_font is NULL\n");
	return 0;
	}
	measured_width = twrpTruetype::gr_ttf_measureEx(s, new_font);
	// These next 2 lines adjust the y point based on the new font's height
	new_height = twrpTruetype::gr_ttf_getMaxFontHeight(new_font);
	y_scale = (measured_height - new_height) / 2;
	vfont = new_font;
	}
	} else
	measured_width = twrpTruetype::gr_ttf_measureEx(s, vfont);

	int x_adj = measured_width;
	if (measured_width > max_width)
	x_adj = max_width;

	if (placement != TOP_LEFT && placement != BOTTOM_LEFT && placement != TEXT_ONLY_RIGHT) {
	if (placement == CENTER \|\| placement == CENTER_X_ONLY)
	x -= (x_adj / 2);
	else
	x -= x_adj;
	}

	if (placement != TOP_LEFT && placement != TOP_RIGHT) {
	if (placement == CENTER \|\| placement == TEXT_ONLY_RIGHT)
	y -= (measured_height / 2);
	else if (placement == BOTTOM_LEFT \|\| placement == BOTTOM_RIGHT)
	y -= measured_height;
	}
	return twrpTruetype::gr_ttf_textExWH(gl, x, y + y_scale, s, vfont, measured_width + x, -1, gr_draw);
	}

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

	switch (gr_rotation) {
	case 90:
	gl->scissor(gl, gr_draw->width - y - h, x, h, w);
	break;
	case 180:
	gl->scissor(gl, gr_draw->width - x - w, gr_draw->height - y - h, w, h);
	break;
	case 270:
	gl->scissor(gl, y, gr_draw->height - x - w, h, w);
	break;
	default:
	gl->scissor(gl, x, y, w, h);
	break;
	}
	gl->enable(gl, GGL_SCISSOR_TEST);
	}

	void gr_noclip()
	{
	GGLContext *gl = gr_context;
	gl->scissor(gl, 0, 0,
	gr_draw->width - 2 * overscan_offset_x,
	gr_draw->height - 2 * overscan_offset_y);
	gl->disable(gl, GGL_SCISSOR_TEST);
	}

	void gr_line(int x0, int y0, int x1, int y1, int width)
	{
	GGLContext *gl = gr_context;
	int x0_disp, y0_disp, x1_disp, y1_disp;

	x0_disp = ROTATION_X_DISP(x0, y0, gr_draw->width);
	y0_disp = ROTATION_Y_DISP(x0, y0, gr_draw->height);
	x1_disp = ROTATION_X_DISP(x1, y1, gr_draw->width);
	y1_disp = ROTATION_Y_DISP(x1, y1, gr_draw->height);

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

	const int coords0[2] = { x0_disp << 4, y0_disp << 4 };
	const int coords1[2] = { x1_disp << 4, y1_disp << 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 = radiusradius + radius0.8;
	const uint32_t px = (a << 24) \| (b << 16) \| (g << 8) \| r;
	uint32_t *data;

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

	data = (uint32_t )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;
	#if defined(RECOVERY_BGRA)
	surface->format = GGL_PIXEL_FORMAT_BGRA_8888;
	#else
	surface->format = GGL_PIXEL_FORMAT_RGBA_8888;
	#endif

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

	return (gr_surface)surface;
	}

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

	gr_is_curr_clr_opaque = (a == 255);
	}

	void gr_clear()
	{
	if (gr_draw->pixel_bytes == 2) {
	gr_fill(0, 0, gr_fb_width(), gr_fb_height());
	return;
	}

	// This code only works on 32bpp devices
	if (gr_current_r == gr_current_g && gr_current_r == gr_current_b) {
	memset(gr_draw->data, gr_current_r, gr_draw->height * gr_draw->row_bytes);
	} else {
	unsigned char* px = gr_draw->data;
	for (int y = 0; y < gr_draw->height; ++y) {
	for (int x = 0; x < gr_draw->width; ++x) {
	*px++ = gr_current_r;
	*px++ = gr_current_g;
	*px++ = gr_current_b;
	px++;
	}
	px += gr_draw->row_bytes - (gr_draw->width * gr_draw->pixel_bytes);
	}
	}
	}

	void gr_fill(int x, int y, int w, int h)
	{
	GGLContext *gl = gr_context;
	int x0_disp, y0_disp, x1_disp, y1_disp;
	int l_disp, r_disp, t_disp, b_disp;

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

	x0_disp = ROTATION_X_DISP(x, y, gr_draw->width);
	y0_disp = ROTATION_Y_DISP(x, y, gr_draw->height);
	x1_disp = ROTATION_X_DISP(x + w, y + h, gr_draw->width);
	y1_disp = ROTATION_Y_DISP(x + w, y + h, gr_draw->height);
	l_disp = std::min(x0_disp, x1_disp);
	r_disp = std::max(x0_disp, x1_disp);
	t_disp = std::min(y0_disp, y1_disp);
	b_disp = std::max(y0_disp, y1_disp);

	gl->recti(gl, l_disp, t_disp, r_disp, b_disp);

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

	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);

	int dx0_disp, dy0_disp, dx1_disp, dy1_disp;
	int l_disp, r_disp, t_disp, b_disp;

	// Figuring out display coordinates works for gr_rotation == 0 too,
	// and isn't as expensive as allocating and rotating another surface,
	// so we do this anyway.
	dx0_disp = ROTATION_X_DISP(dx, dy, gr_draw->width);
	dy0_disp = ROTATION_Y_DISP(dx, dy, gr_draw->height);
	dx1_disp = ROTATION_X_DISP(dx + w, dy + h, gr_draw->width);
	dy1_disp = ROTATION_Y_DISP(dx + w, dy + h, gr_draw->height);
	l_disp = std::min(dx0_disp, dx1_disp);
	r_disp = std::max(dx0_disp, dx1_disp);
	t_disp = std::min(dy0_disp, dy1_disp);
	b_disp = std::max(dy0_disp, dy1_disp);

	GGLSurface surface_rotated;
	if (gr_rotation != 0) {
	// Do not perform relatively expensive operation if not needed
	surface_rotated.version = sizeof(surface_rotated);
	// Skip the (gr_rotation == 0) \|\| (gr_rotation == 180) check
	// because we are under a gr_rotation != 0 conditional compilation statement
	surface_rotated.width = (gr_rotation == 180) ? surface->width : surface->height;
	surface_rotated.height = (gr_rotation == 180) ? surface->height : surface->width;
	surface_rotated.stride = surface_rotated.width;
	surface_rotated.format = surface->format;
	surface_rotated.data = (GGLubyte) malloc(surface_rotated.stride surface_rotated.height * 4);
	surface_ROTATION_transform((gr_surface) &surface_rotated, (const gr_surface) surface, 4);

	gl->bindTexture(gl, &surface_rotated);
	} else {
	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 - l_disp, sy - t_disp);
	gl->recti(gl, l_disp, t_disp, r_disp, b_disp);
	gl->disable(gl, GGL_TEXTURE_2D);

	if (gr_rotation != 0)
	free(surface_rotated.data);

	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_flip() {
	gr_draw = gr_backend->flip(gr_backend);
	// On double buffered back ends, when we flip, we need to tell
	// pixel flinger to draw to the other buffer
	gr_mem_surface.data = (GGLubyte*)gr_draw->data;
	gr_context->colorBuffer(gr_context, &gr_mem_surface);
	}

	static void get_memory_surface(GGLSurface* ms) {
	ms->version = sizeof(*ms);
	ms->width = gr_draw->width;
	ms->height = gr_draw->height;
	ms->stride = gr_draw->row_bytes / gr_draw->pixel_bytes;
	ms->data = (GGLubyte*)gr_draw->data;
	ms->format = gr_draw->format;
	}

	int gr_init(void)
	{
	gr_draw = NULL;

	char gr_rotation_string[PROPERTY_VALUE_MAX];
	char default_rotation[4];
	snprintf(default_rotation, 4, "%d", TW_ROTATION);
	property_get("persist.twrp.rotation", gr_rotation_string, default_rotation);
	gr_rotation = atoi(gr_rotation_string);
	if (!(gr_rotation == 90 \|\| gr_rotation == 180 \|\| gr_rotation == 270))
	gr_rotation = 0;

	#ifdef MSM_BSP
	gr_backend = open_overlay();
	if (gr_backend) {
	gr_draw = gr_backend->init(gr_backend);
	if (!gr_draw) {
	gr_backend->exit(gr_backend);
	} else
	printf("Using overlay graphics.\n");
	}
	#endif

	#ifdef HAS_ADF
	if (!gr_backend \|\| !gr_draw) {
	gr_backend = open_adf();
	if (gr_backend) {
	gr_draw = gr_backend->init(gr_backend);
	if (!gr_draw) {
	gr_backend->exit(gr_backend);
	} else
	printf("Using adf graphics.\n");
	}
	}
	#else
	#ifdef MSM_BSP
	printf("Skipping adf graphics because TW_TARGET_USES_QCOM_BSP := true\n");
	#else
	printf("Skipping adf graphics -- not present in build tree\n");
	#endif
	#endif

	#ifdef HAS_DRM
	if (!gr_backend \|\| !gr_draw) {
	gr_backend = open_drm();
	gr_draw = gr_backend->init(gr_backend);
	if (gr_draw)
	printf("Using drm graphics.\n");
	}
	#else
	printf("Skipping drm graphics -- not present in build tree\n");
	#endif

	if (!gr_backend \|\| !gr_draw) {
	gr_backend = open_fbdev();
	gr_draw = gr_backend->init(gr_backend);
	if (gr_draw == NULL) {
	return -1;
	} else
	printf("Using fbdev graphics.\n");
	}

	overscan_offset_x = gr_draw->width * overscan_percent / 100;
	overscan_offset_y = gr_draw->height * overscan_percent / 100;

	// Set up pixelflinger
	get_memory_surface(&gr_mem_surface);
	gglInit(&gr_context);
	GGLContext *gl = gr_context;
	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);

	gr_flip();
	gr_flip();

	return 0;
	}

	void gr_exit(void)
	{
	gr_backend->exit(gr_backend);
	}

	int gr_fb_width(void)
	{
	return (gr_rotation == 0 \|\| gr_rotation == 180) ?
	gr_draw->width - 2 * overscan_offset_x :
	gr_draw->height - 2 * overscan_offset_y;
	}

	int gr_fb_height(void)
	{
	return (gr_rotation == 0 \|\| gr_rotation == 180) ?
	gr_draw->height - 2 * overscan_offset_y :
	gr_draw->width - 2 * overscan_offset_x;
	}

	void gr_fb_blank(bool blank)
	{
	gr_backend->blank(gr_backend, blank);
	}

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

	// Allocate the data
	get_memory_surface(ms);
	ms->data = (GGLubyte)malloc(ms->stride ms->height * gr_draw->pixel_bytes);

	// Now, copy the data
	memcpy(ms->data, gr_mem_surface.data, gr_draw->width * gr_draw->height * gr_draw->pixel_bytes / 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, gr_draw->width * gr_draw->height * gr_draw->pixel_bytes / 8);
	}