1 files changed, 716 insertions, 0 deletions

diff --git a/minuitwrp/graphics.c b/minuitwrp/graphics.c
new file mode 100644
index 000000000..939f098d1
--- /dev/null
+++ b/minuitwrp/graphics.c
@@ -0,0 +1,716 @@
+/*
+ * 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 <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 <pixelflinger/pixelflinger.h>
+
+#include "minui.h"
+
+#ifdef BOARD_USE_CUSTOM_RECOVERY_FONT
+#include BOARD_USE_CUSTOM_RECOVERY_FONT
+#else
+#include "font_10x18.h"
+#endif
+
+#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 PRINT_SCREENINFO 1 // Enables printing of screen info to log
+
+typedef struct {
+    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[2];
+static GGLSurface gr_mem_surface;
+static unsigned gr_active_fb = 0;
+
+static int gr_fb_fd = -1;
+static int gr_vt_fd = -1;
+
+static struct fb_var_screeninfo vi;
+static struct fb_fix_screeninfo fi;
+
+#ifdef PRINT_SCREENINFO
+static void print_fb_var_screeninfo()
+{
+	LOGI("vi.xres: %d\n", vi.xres);
+	LOGI("vi.yres: %d\n", vi.yres);
+	LOGI("vi.xres_virtual: %d\n", vi.xres_virtual);
+	LOGI("vi.yres_virtual: %d\n", vi.yres_virtual);
+	LOGI("vi.xoffset: %d\n", vi.xoffset);
+	LOGI("vi.yoffset: %d\n", vi.yoffset);
+	LOGI("vi.bits_per_pixel: %d\n", vi.bits_per_pixel);
+	LOGI("vi.grayscale: %d\n", vi.grayscale);
+}
+#endif
+
+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);
+
+    vi.bits_per_pixel = PIXEL_SIZE * 8;
+    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_RGBX_8888) {
+        fprintf(stderr, "Pixel format: RGBX_8888\n");
+        if (PIXEL_SIZE != 4)    fprintf(stderr, "E: Pixel Size mismatch!\n");
+        vi.red.offset     = 24;
+        vi.red.length     = 8;
+        vi.green.offset   = 16;
+        vi.green.length   = 8;
+        vi.blue.offset    = 8;
+        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;
+    }
+
+    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;
+    }
+
+#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
+    LOGI("setting JANKY BACKBUFFER\n");
+    fb->stride = fi.line_length/2;
+#else
+    fb->stride = vi.xres_virtual;
+#endif
+    fb->data = bits;
+    fb->format = PIXEL_FORMAT;
+    memset(fb->data, 0, vi.yres * fb->stride * PIXEL_SIZE);
+
+    fb++;
+
+    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 = (void*) (((unsigned) bits) + vi.yres * fi.line_length);
+#else
+    fb->stride = vi.xres_virtual;
+    fb->data = (void*) (((unsigned) bits) + vi.yres * fb->stride * PIXEL_SIZE);
+#endif
+    fb->format = PIXEL_FORMAT;
+    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) return;
+    vi.yres_virtual = vi.yres * 2;
+    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)
+{
+    GGLContext *gl = gr_context;
+
+    /* swap front and back buffers */
+    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;
+    for (i = 1; i < (vi.xres * vi.yres); i++) {
+        unsigned short tmp = gr_mem_surface.data[i];
+        gr_mem_surface.data[i] = gr_mem_surface.data[(vi.xres * vi.yres * 2) - i];
+        gr_mem_surface.data[(vi.xres * vi.yres * 2) - i] = tmp;
+    }
+#endif
+
+    /* 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);
+
+    /* 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);
+}
+
+int gr_measureEx(const char *s, void* font)
+{
+    GRFont* fnt = (GRFont*) font;
+    int total = 0;
+    unsigned pos;
+    unsigned off;
+
+    if (!fnt)   fnt = gr_font;
+
+    while ((off = *s++))
+    {
+        off -= 32;
+        if (off < 96)
+            total += (fnt->offset[off+1] - fnt->offset[off]);
+    }
+    return total;
+}
+
+unsigned character_width(const char *s, void* pFont)
+{
+	GRFont *font = (GRFont*) pFont;
+	unsigned off;
+
+	/* Handle default font */
+    if (!font)  font = gr_font;
+
+	off = *s - 32;
+	if (off == 0)
+		return 0;
+
+	return font->offset[off+1] - font->offset[off];
+}
+
+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;
+
+    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;
+        }
+    }
+
+    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;
+
+    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;
+			}
+        }
+    }
+
+    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;
+
+    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 < 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;
+        }
+    }
+
+    return x;
+}
+
+int twgr_text(int x, int y, const char *s)
+{
+    GGLContext *gl = gr_context;
+    GRFont *font = gr_font;
+    unsigned off;
+    unsigned cwidth;
+
+    y -= font->ascent;
+
+    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;
+        if (off < 96) {
+            cwidth = font->offset[off+1] - font->offset[off];
+            gl->texCoord2i(gl, (off * cwidth) - x, 0 - y);
+            gl->recti(gl, x, y, x + cwidth, y + font->cheight);
+        }
+        x += cwidth;
+    }
+
+    return x;
+}
+
+void gr_fill(int x, int y, int w, int h)
+{
+    GGLContext *gl = gr_context;
+    gl->disable(gl, GGL_TEXTURE_2D);
+    gl->recti(gl, x, y, x + w, y + h);
+}
+
+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;
+    gl->bindTexture(gl, (GGLSurface*) source);
+    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);
+}
+
+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, "/res/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->cheight = height;
+    font->ascent = height - 2;
+    return (void*) font;
+}
+
+int gr_getFontDetails(void* font, unsigned* cheight, unsigned* maxwidth)
+{
+    GRFont *fnt = (GRFont*) font;
+
+    if (!fnt)   fnt = gr_font;
+    if (!fnt)   return -1;
+
+    if (cheight)    *cheight = fnt->cheight;
+    if (maxwidth)
+    {
+        int pos;
+        *maxwidth = 0;
+        for (pos = 0; pos < 96; pos++)
+        {
+            unsigned int width = fnt->offset[pos+1] - fnt->offset[pos];
+            if (width > *maxwidth)
+            {
+                *maxwidth = width;
+            }
+        }
+    }
+    return 0;
+}
+
+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->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;
+    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);
+
+//    gr_fb_blank(true);
+//    gr_fb_blank(false);
+
+    return 0;
+}
+
+void gr_exit(void)
+{
+    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;
+}
+
+void gr_fb_blank(int blank)
+{
+    int ret;
+
+    ret = ioctl(gr_fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK);
+    if (ret < 0)
+        perror("ioctl(): blank");
+}
+
+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);
+}