M7350v1_en_gpl

bootable/recovery/minui/Android.mk

@@ -0,0 +1,19 @@
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := graphics.c events.c resources.c
+
+LOCAL_C_INCLUDES +=\
+    external/libpng\
+    external/zlib
+
+LOCAL_MODULE := libminui
+
+ifeq ($(TARGET_RECOVERY_PIXEL_FORMAT),"RGBX_8888")
+  LOCAL_CFLAGS += -DRECOVERY_RGBX
+endif
+ifeq ($(TARGET_RECOVERY_PIXEL_FORMAT),"BGRA_8888")
+  LOCAL_CFLAGS += -DRECOVERY_BGRA
+endif
+
+include $(BUILD_STATIC_LIBRARY)

bootable/recovery/minui/events.c

@@ -0,0 +1,175 @@
+/*
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <sys/poll.h>
+
+#include <linux/input.h>
+
+#include "minui.h"
+
+#define MAX_DEVICES 16
+#define MAX_MISC_FDS 16
+
+#define BITS_PER_LONG (sizeof(unsigned long) * 8)
+#define BITS_TO_LONGS(x) (((x) + BITS_PER_LONG - 1) / BITS_PER_LONG)
+
+#define test_bit(bit, array) \
+    ((array)[(bit)/BITS_PER_LONG] & (1 << ((bit) % BITS_PER_LONG)))
+
+struct fd_info {
+    ev_callback cb;
+    void *data;
+};
+
+static struct pollfd ev_fds[MAX_DEVICES + MAX_MISC_FDS];
+static struct fd_info ev_fdinfo[MAX_DEVICES + MAX_MISC_FDS];
+
+static unsigned ev_count = 0;
+static unsigned ev_dev_count = 0;
+static unsigned ev_misc_count = 0;
+
+int ev_init(ev_callback input_cb, void *data)
+{
+    DIR *dir;
+    struct dirent *de;
+    int fd;
+
+    dir = opendir("/dev/input");
+    if(dir != 0) {
+        while((de = readdir(dir))) {
+            unsigned long ev_bits[BITS_TO_LONGS(EV_MAX)];
+
+//            fprintf(stderr,"/dev/input/%s\n", de->d_name);
+            if(strncmp(de->d_name,"event",5)) continue;
+            fd = openat(dirfd(dir), de->d_name, O_RDONLY);
+            if(fd < 0) continue;
+
+            /* read the evbits of the input device */
+            if (ioctl(fd, EVIOCGBIT(0, sizeof(ev_bits)), ev_bits) < 0) {
+                close(fd);
+                continue;
+            }
+
+            /* TODO: add ability to specify event masks. For now, just assume
+             * that only EV_KEY and EV_REL event types are ever needed. */
+            if (!test_bit(EV_KEY, ev_bits) && !test_bit(EV_REL, ev_bits)) {
+                close(fd);
+                continue;
+            }
+
+            ev_fds[ev_count].fd = fd;
+            ev_fds[ev_count].events = POLLIN;
+            ev_fdinfo[ev_count].cb = input_cb;
+            ev_fdinfo[ev_count].data = data;
+            ev_count++;
+            ev_dev_count++;
+            if(ev_dev_count == MAX_DEVICES) break;
+        }
+    }
+
+    return 0;
+}
+
+int ev_add_fd(int fd, ev_callback cb, void *data)
+{
+    if (ev_misc_count == MAX_MISC_FDS || cb == NULL)
+        return -1;
+
+    ev_fds[ev_count].fd = fd;
+    ev_fds[ev_count].events = POLLIN;
+    ev_fdinfo[ev_count].cb = cb;
+    ev_fdinfo[ev_count].data = data;
+    ev_count++;
+    ev_misc_count++;
+    return 0;
+}
+
+void ev_exit(void)
+{
+    while (ev_count > 0) {
+        close(ev_fds[--ev_count].fd);
+    }
+    ev_misc_count = 0;
+    ev_dev_count = 0;
+}
+
+int ev_wait(int timeout)
+{
+    int r;
+
+    r = poll(ev_fds, ev_count, timeout);
+    if (r <= 0)
+        return -1;
+    return 0;
+}
+
+void ev_dispatch(void)
+{
+    unsigned n;
+    int ret;
+
+    for (n = 0; n < ev_count; n++) {
+        ev_callback cb = ev_fdinfo[n].cb;
+        if (cb && (ev_fds[n].revents & ev_fds[n].events))
+            cb(ev_fds[n].fd, ev_fds[n].revents, ev_fdinfo[n].data);
+    }
+}
+
+int ev_get_input(int fd, short revents, struct input_event *ev)
+{
+    int r;
+
+    if (revents & POLLIN) {
+        r = read(fd, ev, sizeof(*ev));
+        if (r == sizeof(*ev))
+            return 0;
+    }
+    return -1;
+}
+
+int ev_sync_key_state(ev_set_key_callback set_key_cb, void *data)
+{
+    unsigned long key_bits[BITS_TO_LONGS(KEY_MAX)];
+    unsigned long ev_bits[BITS_TO_LONGS(EV_MAX)];
+    unsigned i;
+    int ret;
+
+    for (i = 0; i < ev_dev_count; i++) {
+        int code;
+
+        memset(key_bits, 0, sizeof(key_bits));
+        memset(ev_bits, 0, sizeof(ev_bits));
+
+        ret = ioctl(ev_fds[i].fd, EVIOCGBIT(0, sizeof(ev_bits)), ev_bits);
+        if (ret < 0 || !test_bit(EV_KEY, ev_bits))
+            continue;
+
+        ret = ioctl(ev_fds[i].fd, EVIOCGKEY(sizeof(key_bits)), key_bits);
+        if (ret < 0)
+            continue;
+
+        for (code = 0; code <= KEY_MAX; code++) {
+            if (test_bit(code, key_bits))
+                set_key_cb(code, 1, data);
+        }
+    }
+
+    return 0;
+}

bootable/recovery/minui/font_10x18.h

@@ -0,0 +1,214 @@
+struct {
+  unsigned width;
+  unsigned height;
+  unsigned cwidth;
+  unsigned cheight;
+  unsigned char rundata[];
+} font = {
+  .width = 960,
+  .height = 18,
+  .cwidth = 10,
+  .cheight = 18,
+  .rundata = {
+0x7f,0x7f,0x7f,0x7f,0x7f,0x7f,0x7f,0x55,0x82,0x06,0x82,0x02,0x82,0x10,0x82,
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+0x84,0x3f,
+0x00,
+  }
+};

bootable/recovery/minui/graphics.c

@@ -0,0 +1,381 @@
+/*
+ * 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 "font_10x18.h"
+#include "minui.h"
+
+#if defined(RECOVERY_BGRA)
+#define PIXEL_FORMAT GGL_PIXEL_FORMAT_BGRA_8888
+#define PIXEL_SIZE   4
+#elif defined(RECOVERY_RGBX)
+#define PIXEL_FORMAT GGL_PIXEL_FORMAT_RGBX_8888
+#define PIXEL_SIZE   4
+#else
+#define PIXEL_FORMAT GGL_PIXEL_FORMAT_RGB_565
+#define PIXEL_SIZE   2
+#endif
+
+#define NUM_BUFFERS 2
+
+typedef struct {
+    GGLSurface texture;
+    unsigned cwidth;
+    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];
+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;
+
+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;
+    }
+
+    vi.bits_per_pixel = PIXEL_SIZE * 8;
+    if (PIXEL_FORMAT == GGL_PIXEL_FORMAT_BGRA_8888) {
+      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) {
+      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 { /* RGB565*/
+      vi.red.offset     = 11;
+      vi.red.length     = 5;
+      vi.green.offset   = 5;
+      vi.green.length   = 6;
+      vi.blue.offset    = 0;
+      vi.blue.length    = 5;
+      vi.transp.offset  = 0;
+      vi.transp.length  = 0;
+    }
+    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;
+    }
+
+    fb->version = sizeof(*fb);
+    fb->width = vi.xres;
+    fb->height = vi.yres;
+    fb->stride = fi.line_length/PIXEL_SIZE;
+    fb->data = bits;
+    fb->format = PIXEL_FORMAT;
+    memset(fb->data, 0, vi.yres * fi.line_length);
+
+    fb++;
+
+    fb->version = sizeof(*fb);
+    fb->width = vi.xres;
+    fb->height = vi.yres;
+    fb->stride = fi.line_length/PIXEL_SIZE;
+    fb->data = (void*) (((unsigned) bits) + vi.yres * fi.line_length);
+    fb->format = PIXEL_FORMAT;
+    memset(fb->data, 0, vi.yres * fi.line_length);
+
+    return fd;
+}
+
+static void get_memory_surface(GGLSurface* ms) {
+  ms->version = sizeof(*ms);
+  ms->width = vi.xres;
+  ms->height = vi.yres;
+  ms->stride = fi.line_length/PIXEL_SIZE;
+  ms->data = malloc(fi.line_length * vi.yres);
+  ms->format = PIXEL_FORMAT;
+}
+
+static void set_active_framebuffer(unsigned n)
+{
+    if (n > 1) 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)
+{
+    GGLContext *gl = gr_context;
+
+    /* swap front and back buffers */
+    gr_active_fb = (gr_active_fb + 1) & 1;
+
+    /* 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,
+           fi.line_length * vi.yres);
+
+    /* 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_measure(const char *s)
+{
+    return gr_font->cwidth * strlen(s);
+}
+
+void gr_font_size(int *x, int *y)
+{
+    *x = gr_font->cwidth;
+    *y = gr_font->cheight;
+}
+
+int gr_text(int x, int y, const char *s)
+{
+    GGLContext *gl = gr_context;
+    GRFont *font = gr_font;
+    unsigned off;
+
+    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) {
+            gl->texCoord2i(gl, (off * font->cwidth) - x, 0 - y);
+            gl->recti(gl, x, y, x + font->cwidth, y + font->cheight);
+        }
+        x += font->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, w, 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;
+}
+
+static void gr_init_font(void)
+{
+    GGLSurface *ftex;
+    unsigned char *bits, *rle;
+    unsigned char *in, data;
+
+    gr_font = calloc(sizeof(*gr_font), 1);
+    ftex = &gr_font->texture;
+
+    bits = malloc(font.width * font.height);
+
+    ftex->version = sizeof(*ftex);
+    ftex->width = font.width;
+    ftex->height = font.height;
+    ftex->stride = font.width;
+    ftex->data = (void*) bits;
+    ftex->format = GGL_PIXEL_FORMAT_A_8;
+
+    in = font.rundata;
+    while((data = *in++)) {
+        memset(bits, (data & 0x80) ? 255 : 0, data & 0x7f);
+        bits += (data & 0x7f);
+    }
+
+    gr_font->cwidth = font.cwidth;
+    gr_font->cheight = font.cheight;
+    gr_font->ascent = font.cheight - 2;
+}
+
+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.
+        perror("can't open /dev/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) {
+        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(bool blank)
+{
+    int ret;
+
+    ret = ioctl(gr_fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK);
+    if (ret < 0)
+        perror("ioctl(): blank");
+}

bootable/recovery/minui/minui.h

@@ -0,0 +1,72 @@
+/*
+ * 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.
+ */
+
+#ifndef _MINUI_H_
+#define _MINUI_H_
+
+#include <stdbool.h>
+
+typedef void* gr_surface;
+typedef unsigned short gr_pixel;
+
+int gr_init(void);
+void gr_exit(void);
+
+int gr_fb_width(void);
+int gr_fb_height(void);
+gr_pixel *gr_fb_data(void);
+void gr_flip(void);
+void gr_fb_blank(bool blank);
+
+void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a);
+void gr_fill(int x, int y, int w, int h);
+int gr_text(int x, int y, const char *s);
+int gr_measure(const char *s);
+void gr_font_size(int *x, int *y);
+
+void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy);
+unsigned int gr_get_width(gr_surface surface);
+unsigned int gr_get_height(gr_surface surface);
+
+// input event structure, include <linux/input.h> for the definition.
+// see http://www.mjmwired.net/kernel/Documentation/input/ for info.
+struct input_event;
+
+typedef int (*ev_callback)(int fd, short revents, void *data);
+typedef int (*ev_set_key_callback)(int code, int value, void *data);
+
+int ev_init(ev_callback input_cb, void *data);
+void ev_exit(void);
+int ev_add_fd(int fd, ev_callback cb, void *data);
+int ev_sync_key_state(ev_set_key_callback set_key_cb, void *data);
+
+/* timeout has the same semantics as for poll
+ *    0 : don't block
+ *  < 0 : block forever
+ *  > 0 : block for 'timeout' milliseconds
+ */
+int ev_wait(int timeout);
+
+int ev_get_input(int fd, short revents, struct input_event *ev);
+void ev_dispatch(void);
+
+// Resources
+
+// Returns 0 if no error, else negative.
+int res_create_surface(const char* name, gr_surface* pSurface);
+void res_free_surface(gr_surface surface);
+
+#endif

bootable/recovery/minui/mkfont.c

@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char *argv)
+{
+    unsigned n;
+    unsigned char *x;
+    unsigned m;
+    unsigned run_val;
+    unsigned run_count;
+ 
+    n = gimp_image.width * gimp_image.height;
+    m = 0;
+    x = gimp_image.pixel_data;
+
+    printf("struct {\n");
+    printf("  unsigned width;\n");
+    printf("  unsigned height;\n");
+    printf("  unsigned cwidth;\n");
+    printf("  unsigned cheight;\n");
+    printf("  unsigned char rundata[];\n");
+    printf("} font = {\n");
+    printf("  .width = %d,\n  .height = %d,\n  .cwidth = %d,\n  .cheight = %d,\n", gimp_image.width, gimp_image.height,
+           gimp_image.width / 96, gimp_image.height);
+    printf("  .rundata = {\n");
+   
+    run_val = (*x ? 0 : 255);
+    run_count = 1;
+    n--;
+    x+=3;
+
+    while(n-- > 0) {
+        unsigned val = (*x ? 0 : 255);
+        x+=3;
+        if((val == run_val) && (run_count < 127)) {
+            run_count++;
+        } else {
+eject:
+            printf("0x%02x,",run_count | (run_val ? 0x80 : 0x00));
+            run_val = val;
+            run_count = 1;
+            m += 5;
+            if(m >= 75) {
+                printf("\n");
+                m = 0;
+            }
+        }
+    }
+    printf("0x%02x,",run_count | (run_val ? 0x80 : 0x00));
+    printf("\n0x00,");
+    printf("\n");
+    printf("  }\n};\n");
+    return 0;
+}

bootable/recovery/minui/resources.c

@@ -0,0 +1,181 @@
+/*
+ * 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 <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 <png.h>
+
+#include "minui.h"
+
+// libpng gives "undefined reference to 'pow'" errors, and I have no
+// idea how to convince the build system to link with -lm.  We don't
+// need this functionality (it's used for gamma adjustment) so provide
+// a dummy implementation to satisfy the linker.
+double pow(double x, double y) {
+    return x;
+}
+
+int res_create_surface(const char* name, gr_surface* pSurface) {
+    char resPath[256];
+    GGLSurface* surface = NULL;
+    int result = 0;
+    unsigned char header[8];
+    png_structp png_ptr = NULL;
+    png_infop info_ptr = NULL;
+
+    *pSurface = NULL;
+
+    snprintf(resPath, sizeof(resPath)-1, "/res/images/%s.png", name);
+    resPath[sizeof(resPath)-1] = '\0';
+    FILE* fp = fopen(resPath, "rb");
+    if (fp == NULL) {
+        result = -1;
+        goto exit;
+    }
+
+    size_t bytesRead = fread(header, 1, sizeof(header), fp);
+    if (bytesRead != sizeof(header)) {
+        result = -2;
+        goto exit;
+    }
+
+    if (png_sig_cmp(header, 0, sizeof(header))) {
+        result = -3;
+        goto exit;
+    }
+
+    png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+    if (!png_ptr) {
+        result = -4;
+        goto exit;
+    }
+
+    info_ptr = png_create_info_struct(png_ptr);
+    if (!info_ptr) {
+        result = -5;
+        goto exit;
+    }
+
+    if (setjmp(png_jmpbuf(png_ptr))) {
+        result = -6;
+        goto exit;
+    }
+
+    png_init_io(png_ptr, fp);
+    png_set_sig_bytes(png_ptr, sizeof(header));
+    png_read_info(png_ptr, info_ptr);
+
+    size_t width = info_ptr->width;
+    size_t height = info_ptr->height;
+    size_t stride = 4 * width;
+    size_t pixelSize = stride * height;
+
+    int color_type = info_ptr->color_type;
+    int bit_depth = info_ptr->bit_depth;
+    int channels = info_ptr->channels;
+    if (!(bit_depth == 8 &&
+          ((channels == 3 && color_type == PNG_COLOR_TYPE_RGB) ||
+           (channels == 4 && color_type == PNG_COLOR_TYPE_RGBA) ||
+           (channels == 1 && color_type == PNG_COLOR_TYPE_PALETTE)))) {
+        return -7;
+        goto exit;
+    }
+
+    surface = malloc(sizeof(GGLSurface) + pixelSize);
+    if (surface == NULL) {
+        result = -8;
+        goto exit;
+    }
+    unsigned char* pData = (unsigned char*) (surface + 1);
+    surface->version = sizeof(GGLSurface);
+    surface->width = width;
+    surface->height = height;
+    surface->stride = width; /* Yes, pixels, not bytes */
+    surface->data = pData;
+    surface->format = (channels == 3) ?
+            GGL_PIXEL_FORMAT_RGBX_8888 : GGL_PIXEL_FORMAT_RGBA_8888;
+
+    int alpha = 0;
+    if (color_type == PNG_COLOR_TYPE_PALETTE) {
+        png_set_palette_to_rgb(png_ptr);
+    }
+    if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) {
+        png_set_tRNS_to_alpha(png_ptr);
+        alpha = 1;
+    }
+
+    int y;
+    if (channels == 3 || (channels == 1 && !alpha)) {
+        for (y = 0; y < height; ++y) {
+            unsigned char* pRow = pData + y * stride;
+            png_read_row(png_ptr, pRow, NULL);
+
+            int x;
+            for(x = width - 1; x >= 0; x--) {
+                int sx = x * 3;
+                int dx = x * 4;
+                unsigned char r = pRow[sx];
+                unsigned char g = pRow[sx + 1];
+                unsigned char b = pRow[sx + 2];
+                unsigned char a = 0xff;
+                pRow[dx    ] = r; // r
+                pRow[dx + 1] = g; // g
+                pRow[dx + 2] = b; // b
+                pRow[dx + 3] = a;
+            }
+        }
+    } else {
+        for (y = 0; y < height; ++y) {
+            unsigned char* pRow = pData + y * stride;
+            png_read_row(png_ptr, pRow, NULL);
+        }
+    }
+
+    *pSurface = (gr_surface) surface;
+
+exit:
+    png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+
+    if (fp != NULL) {
+        fclose(fp);
+    }
+    if (result < 0) {
+        if (surface) {
+            free(surface);
+        }
+    }
+    return result;
+}
+
+void res_free_surface(gr_surface surface) {
+    GGLSurface* pSurface = (GGLSurface*) surface;
+    if (pSurface) {
+        free(pSurface);
+    }
+}