McSinyx
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megapixels
mirror of https://git.sr.ht/~martijnbraam/megapixels
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Code Issues Releases Wiki Activity

Get zbar working again

This commit is contained in:
Benjamin Schaaf 2021-04-26 18:09:04 +10:00
parent f9e6576266
commit 44fc390b99
8 changed files with 329 additions and 254 deletions
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4
data/blit.frag
View File

@ -6,8 +6,6 @@ uniform sampler2D texture;
varying vec2 uv;
#define fetch(p) texture2D(texture, p).r
void main() {
gl_FragColor = texture2D(texture, uv);
gl_FragColor = vec4(texture2D(texture, uv).rgb, 1);
}

2
data/org.postmarketos.Megapixels.gresource.xml
View File

@ -11,6 +11,8 @@
<file preprocess="xml-stripblanks">shutter-symbolic.svg</file>
<file>blit.vert</file>
<file>blit.frag</file>
<file>solid.vert</file>
<file>solid.frag</file>
<file>debayer.vert</file>
<file>debayer.frag</file>
</gresource>

9
data/solid.frag Normal file
View File

@ -0,0 +1,9 @@
#ifdef GL_ES
precision mediump float;
#endif
uniform vec4 color;
void main() {
gl_FragColor = color;
}

9
data/solid.vert Normal file
View File

@ -0,0 +1,9 @@
#ifdef GL_ES
precision mediump float;
#endif
attribute vec2 vert;
void main() {
gl_Position = vec4(vert, 0, 1);
}

404
src/main.c
View File

@ -54,7 +54,6 @@ static MPProcessPipelineBuffer *current_preview_buffer = NULL;
static int preview_buffer_width = -1;
static int preview_buffer_height = -1;
static cairo_surface_t *status_surface = NULL;
static char last_path[260] = "";
static MPZBarScanResult *zbar_result = NULL;
@ -67,10 +66,7 @@ GtkWidget *main_stack;
GtkWidget *open_last_stack;
GtkWidget *thumb_last;
GtkWidget *process_spinner;
GtkWidget *control_box;
GtkWidget *control_name;
GtkAdjustment *control_slider;
GtkWidget *control_auto;
GtkWidget *scanned_codes;
int
remap(int value, int input_min, int input_max, int output_min, int output_max)
@ -241,95 +237,10 @@ mp_main_capture_completed(cairo_surface_t *thumb, const char *fname)
(GSourceFunc)capture_completed, args, free);
}
static void
draw_controls()
{
// cairo_t *cr;
char iso[6];
int temp;
char shutterangle[6];
if (exposure_is_manual) {
temp = (int)((float)exposure / (float)camera->capture_mode.height *
360);
sprintf(shutterangle, "%d\u00b0", temp);
} else {
sprintf(shutterangle, "auto");
}
if (gain_is_manual) {
temp = remap(gain - 1, 0, gain_max, camera->iso_min,
camera->iso_max);
sprintf(iso, "%d", temp);
} else {
sprintf(iso, "auto");
}
if (status_surface)
cairo_surface_destroy(status_surface);
// Make a service to show status of controls, 32px high
// if (gtk_widget_get_window(preview) == NULL) {
// return;
// }
// status_surface =
// gdk_window_create_similar_surface(gtk_widget_get_window(preview),
// CAIRO_CONTENT_COLOR_ALPHA,
// preview_width, 32);
// cr = cairo_create(status_surface);
// cairo_set_source_rgba(cr, 0, 0, 0, 0.0);
// cairo_paint(cr);
// // Draw the outlines for the headings
// cairo_select_font_face(cr, "sans-serif", CAIRO_FONT_SLANT_NORMAL,
// CAIRO_FONT_WEIGHT_BOLD);
// cairo_set_font_size(cr, 9);
// cairo_set_source_rgba(cr, 0, 0, 0, 1);
// cairo_move_to(cr, 16, 16);
// cairo_text_path(cr, "ISO");
// cairo_stroke(cr);
// cairo_move_to(cr, 60, 16);
// cairo_text_path(cr, "Shutter");
// cairo_stroke(cr);
// // Draw the fill for the headings
// cairo_set_source_rgba(cr, 1, 1, 1, 1);
// cairo_move_to(cr, 16, 16);
// cairo_show_text(cr, "ISO");
// cairo_move_to(cr, 60, 16);
// cairo_show_text(cr, "Shutter");
// // Draw the outlines for the values
// cairo_select_font_face(cr, "sans-serif", CAIRO_FONT_SLANT_NORMAL,
// CAIRO_FONT_WEIGHT_NORMAL);
// cairo_set_font_size(cr, 11);
// cairo_set_source_rgba(cr, 0, 0, 0, 1);
// cairo_move_to(cr, 16, 26);
// cairo_text_path(cr, iso);
// cairo_stroke(cr);
// cairo_move_to(cr, 60, 26);
// cairo_text_path(cr, shutterangle);
// cairo_stroke(cr);
// // Draw the fill for the values
// cairo_set_source_rgba(cr, 1, 1, 1, 1);
// cairo_move_to(cr, 16, 26);
// cairo_show_text(cr, iso);
// cairo_move_to(cr, 60, 26);
// cairo_show_text(cr, shutterangle);
// cairo_destroy(cr);
// gtk_widget_queue_draw_area(preview, 0, 0, preview_width, 32);
}
static GLuint blit_program;
static GLuint blit_uniform_texture;
static GLuint solid_program;
static GLuint solid_uniform_color;
static GLuint quad;
static void
@ -361,9 +272,32 @@ preview_realize(GtkGLArea *area)
blit_uniform_texture = glGetUniformLocation(blit_program, "texture");
GLuint solid_shaders[] = {
gl_util_load_shader("/org/postmarketos/Megapixels/solid.vert", GL_VERTEX_SHADER, NULL, 0),
gl_util_load_shader("/org/postmarketos/Megapixels/solid.frag", GL_FRAGMENT_SHADER, NULL, 0),
};
solid_program = gl_util_link_program(solid_shaders, 2);
glBindAttribLocation(solid_program, GL_UTIL_VERTEX_ATTRIBUTE, "vert");
check_gl();
solid_uniform_color = glGetUniformLocation(solid_program, "color");
quad = gl_util_new_quad();
}
static void
position_preview(float *offset_x, float *offset_y, float *size_x, float *size_y)
{
double ratio = preview_buffer_height / (double)preview_buffer_width;
*offset_x = 0;
*offset_y = 0;
*size_x = preview_width;
*size_y = preview_width * ratio;
}
static gboolean
preview_draw(GtkGLArea *area, GdkGLContext *ctx, gpointer data)
{
@ -382,11 +316,12 @@ preview_draw(GtkGLArea *area, GdkGLContext *ctx, gpointer data)
glClearColor(0, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
double ratio = preview_buffer_height / (double)preview_buffer_width;
glViewport(0,
preview_height - preview_width * ratio,
preview_width,
preview_width * ratio);
float offset_x, offset_y, size_x, size_y;
position_preview(&offset_x, &offset_y, &size_x, &size_y);
glViewport(offset_x,
preview_height - size_y - offset_y,
size_x,
size_y);
if (current_preview_buffer) {
glUseProgram(blit_program);
@ -400,50 +335,56 @@ preview_draw(GtkGLArea *area, GdkGLContext *ctx, gpointer data)
gl_util_draw_quad(quad);
}
/*
// Clear preview area with black
cairo_paint(cr);
if (surface) {
// Draw camera preview
cairo_save(cr);
int width = cairo_image_surface_get_width(surface);
int height = cairo_image_surface_get_height(surface);
transform_centered(cr, preview_width, preview_height, width, height);
cairo_set_source_surface(cr, surface, 0, 0);
cairo_paint(cr);
// Draw zbar image
if (zbar_result) {
GLuint buffer;
if (!gtk_gl_area_get_use_es(area)) {
glGenBuffers(1, &buffer);
glBindBuffer(GL_ARRAY_BUFFER, buffer);
check_gl();
}
glUseProgram(solid_program);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glUniform4f(solid_uniform_color, 1, 0, 0, 0.5);
for (uint8_t i = 0; i < zbar_result->size; ++i) {
MPZBarCode *code = &zbar_result->codes[i];
cairo_set_line_width(cr, 3.0);
cairo_set_source_rgba(cr, 0, 0.5, 1, 0.75);
cairo_new_path(cr);
cairo_move_to(cr, code->bounds_x[0], code->bounds_y[0]);
for (uint8_t i = 0; i < 4; ++i) {
cairo_line_to(cr, code->bounds_x[i], code->bounds_y[i]);
}
cairo_close_path(cr);
cairo_stroke(cr);
GLfloat vertices[] = {
code->bounds_x[0], code->bounds_y[0],
code->bounds_x[1], code->bounds_y[1],
code->bounds_x[3], code->bounds_y[3],
code->bounds_x[2], code->bounds_y[2],
};
cairo_save(cr);
cairo_translate(cr, code->bounds_x[0], code->bounds_y[0]);
cairo_show_text(cr, code->data);
cairo_restore(cr);
}
for (int i = 0; i < 4; ++i) {
vertices[i * 2] = 2 * vertices[i * 2] / preview_buffer_width - 1.0;
vertices[i * 2 + 1] = 1.0 - 2 * vertices[i * 2 + 1] / preview_buffer_height;
}
cairo_restore(cr);
if (gtk_gl_area_get_use_es(area)) {
glVertexAttribPointer(GL_UTIL_VERTEX_ATTRIBUTE, 2, GL_FLOAT, 0, 0, vertices);
check_gl();
glEnableVertexAttribArray(GL_UTIL_VERTEX_ATTRIBUTE);
check_gl();
} else {
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STREAM_DRAW);
check_gl();
glVertexAttribPointer(GL_UTIL_VERTEX_ATTRIBUTE, 2, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(GL_UTIL_VERTEX_ATTRIBUTE);
check_gl();
}
// Draw control overlay
cairo_set_source_surface(cr, status_surface, 0, 0);
cairo_paint(cr);
*/
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
check_gl();
}
glDisable(GL_BLEND);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
glFlush();
@ -463,8 +404,6 @@ preview_resize(GtkWidget *widget, int width, int height, gpointer data)
update_io_pipeline();
}
draw_controls();
return TRUE;
}
@ -508,110 +447,124 @@ run_quit_action(GSimpleAction *action, GVariant *param, GApplication *app)
g_application_quit(app);
}
// static bool
// check_point_inside_bounds(int x, int y, int *bounds_x, int *bounds_y)
// {
// bool right = false, left = false, top = false, bottom = false;
static bool
check_point_inside_bounds(int x, int y, int *bounds_x, int *bounds_y)
{
bool right = false, left = false, top = false, bottom = false;
// for (int i = 0; i < 4; ++i) {
// if (x <= bounds_x[i])
// left = true;
// if (x >= bounds_x[i])
// right = true;
// if (y <= bounds_y[i])
// top = true;
// if (y >= bounds_y[i])
// bottom = true;
// }
for (int i = 0; i < 4; ++i) {
if (x <= bounds_x[i])
left = true;
if (x >= bounds_x[i])
right = true;
if (y <= bounds_y[i])
top = true;
if (y >= bounds_y[i])
bottom = true;
}
// return right && left && top && bottom;
// }
return right && left && top && bottom;
}
// static void
// on_zbar_code_tapped(GtkWidget *widget, const MPZBarCode *code)
// {
// GtkWidget *dialog;
// GtkDialogFlags flags = GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT;
// bool data_is_url = g_uri_is_valid(
// code->data, G_URI_FLAGS_PARSE_RELAXED, NULL);
static void
on_zbar_dialog_response(GtkDialog *dialog, int response, char *data)
{
GError *error = NULL;
switch (response) {
case GTK_RESPONSE_YES:
if (!g_app_info_launch_default_for_uri(data,
NULL, &error)) {
g_printerr("Could not launch application: %s\n",
error->message);
}
case GTK_RESPONSE_ACCEPT:
{
GdkDisplay *display = gtk_widget_get_display(GTK_WIDGET(dialog));
gdk_clipboard_set_text(
gdk_display_get_primary_clipboard(display),
data);
}
case GTK_RESPONSE_CANCEL:
break;
default:
g_printerr("Wrong dialog response: %d\n", response);
}
// char* data = strdup(code->data);
g_free(data);
gtk_window_destroy(GTK_WINDOW(dialog));
}
// if (data_is_url) {
// dialog = gtk_message_dialog_new(
// GTK_WINDOW(gtk_widget_get_toplevel(widget)),
// flags,
// GTK_MESSAGE_QUESTION,
// GTK_BUTTONS_NONE,
// "Found a URL '%s' encoded in a %s code.",
// code->data,
// code->type);
// gtk_dialog_add_buttons(
// GTK_DIALOG(dialog),
// "_Open URL",
// GTK_RESPONSE_YES,
// NULL);
// } else {
// dialog = gtk_message_dialog_new(
// GTK_WINDOW(gtk_widget_get_toplevel(widget)),
// flags,
// GTK_MESSAGE_QUESTION,
// GTK_BUTTONS_NONE,
// "Found '%s' encoded in a %s code.",
// code->data,
// code->type);
// }
// gtk_dialog_add_buttons(
// GTK_DIALOG(dialog),
// "_Copy",
// GTK_RESPONSE_ACCEPT,
// "_Cancel",
// GTK_RESPONSE_CANCEL,
// NULL);
static void
on_zbar_code_tapped(GtkWidget *widget, const MPZBarCode *code)
{
GtkWidget *dialog;
GtkDialogFlags flags = GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT;
bool data_is_url = g_uri_is_valid(
code->data, G_URI_FLAGS_PARSE_RELAXED, NULL);
// int result = gtk_dialog_run(GTK_DIALOG(dialog));
char* data = strdup(code->data);
// GError *error = NULL;
// switch (result) {
// case GTK_RESPONSE_YES:
// if (!g_app_info_launch_default_for_uri(data,
// NULL, &error)) {
// g_printerr("Could not launch application: %s\n",
// error->message);
// }
// case GTK_RESPONSE_ACCEPT:
// gtk_clipboard_set_text(
// gtk_clipboard_get(GDK_SELECTION_PRIMARY),
// data, -1);
// case GTK_RESPONSE_CANCEL:
// break;
// default:
// g_printerr("Wrong dialog result: %d\n", result);
// }
// gtk_widget_destroy(dialog);
// }
if (data_is_url) {
dialog = gtk_message_dialog_new(
GTK_WINDOW(gtk_widget_get_root(widget)),
flags,
GTK_MESSAGE_QUESTION,
GTK_BUTTONS_NONE,
"Found a URL '%s' encoded in a %s code.",
code->data,
code->type);
gtk_dialog_add_buttons(
GTK_DIALOG(dialog),
"_Open URL",
GTK_RESPONSE_YES,
NULL);
} else {
dialog = gtk_message_dialog_new(
GTK_WINDOW(gtk_widget_get_root(widget)),
flags,
GTK_MESSAGE_QUESTION,
GTK_BUTTONS_NONE,
"Found '%s' encoded in a %s code.",
code->data,
code->type);
}
gtk_dialog_add_buttons(
GTK_DIALOG(dialog),
"_Copy",
GTK_RESPONSE_ACCEPT,
"_Cancel",
GTK_RESPONSE_CANCEL,
NULL);
void
g_signal_connect(dialog, "response", G_CALLBACK(on_zbar_dialog_response), data);
gtk_widget_show(GTK_WIDGET(dialog));
}
static void
preview_pressed(GtkGestureClick *gesture, int n_press, double x, double y)
{
GtkWidget *widget = gtk_event_controller_get_widget(GTK_EVENT_CONTROLLER(gesture));
// Tapped zbar result
// if (zbar_result) {
// // Transform the event coordinates to the image
// int width = cairo_image_surface_get_width(surface);
// int height = cairo_image_surface_get_height(surface);
// double scale = MIN(preview_width / (double)width, preview_height / (double)height);
// int x = (event->x - preview_width / 2) / scale + width / 2;
// int y = (event->y - preview_height / 2) / scale + height / 2;
if (zbar_result) {
// Transform the event coordinates to the image
float offset_x, offset_y, size_x, size_y;
position_preview(&offset_x, &offset_y, &size_x, &size_y);
// for (uint8_t i = 0; i < zbar_result->size; ++i) {
// MPZBarCode *code = &zbar_result->codes[i];
double scale = preview_buffer_height / size_y;
int zbar_x = (x - offset_x) * scale;
int zbar_y = (y - offset_y) * scale;
// if (check_point_inside_bounds(x, y, code->bounds_x, code->bounds_y)) {
// on_zbar_code_tapped(widget, code);
// return;
// }
// }
// }
for (uint8_t i = 0; i < zbar_result->size; ++i) {
MPZBarCode *code = &zbar_result->codes[i];
if (check_point_inside_bounds(zbar_x, zbar_y, code->bounds_x, code->bounds_y)) {
on_zbar_code_tapped(widget, code);
return;
}
}
}
// Tapped preview image itself, try focussing
if (has_auto_focus_start) {
@ -886,6 +839,7 @@ activate(GtkApplication *app, gpointer data)
open_last_stack = GTK_WIDGET(gtk_builder_get_object(builder, "open_last_stack"));
thumb_last = GTK_WIDGET(gtk_builder_get_object(builder, "thumb_last"));
process_spinner = GTK_WIDGET(gtk_builder_get_object(builder, "process_spinner"));
scanned_codes = GTK_WIDGET(gtk_builder_get_object(builder, "scanned-codes"));
g_signal_connect(window, "realize", G_CALLBACK(on_realize), NULL);

5
src/process_pipeline.c
View File

@ -608,6 +608,9 @@ process_image(MPPipeline *pipeline, const MPBuffer *buffer)
memcpy(image, buffer->data, size);
mp_io_pipeline_release_buffer(buffer->index);
MPZBarImage *zbar_image = mp_zbar_image_new(image, mode.pixel_format, mode.width, mode.height, camera->rotate, camera->mirrored);
mp_zbar_pipeline_process_image(mp_zbar_image_ref(zbar_image));
cairo_surface_t *thumb = process_image_for_preview(image);
if (captures_remaining > 0) {
@ -626,7 +629,7 @@ process_image(MPPipeline *pipeline, const MPBuffer *buffer)
assert(!thumb);
}
free(image);
mp_zbar_image_unref(zbar_image);
++frames_processed;
if (captures_remaining == 0) {

125
src/zbar_pipeline.c
View File

@ -6,6 +6,17 @@
#include <zbar.h>
#include <assert.h>
struct _MPZBarImage {
uint8_t *data;
MPPixelFormat pixel_format;
int width;
int height;
int rotation;
bool mirrored;
_Atomic int ref_count;
};
static MPPipeline *pipeline;
static volatile int frames_processed = 0;
@ -33,7 +44,8 @@ mp_zbar_pipeline_stop()
mp_pipeline_free(pipeline);
}
static bool is_3d_code(zbar_symbol_type_t type)
static bool
is_3d_code(zbar_symbol_type_t type)
{
switch (type) {
case ZBAR_EAN2:
@ -62,9 +74,41 @@ static bool is_3d_code(zbar_symbol_type_t type)
}
}
static MPZBarCode
process_symbol(const zbar_symbol_t *symbol)
static inline void
map_coords(int *x, int *y, int width, int height, int rotation, bool mirrored)
{
int x_r, y_r;
if (rotation == 0) {
x_r = *x;
y_r = *y;
} else if (rotation == 90) {
x_r = *y;
y_r = height - *x - 1;
} else if (rotation == 270) {
x_r = width - *y - 1;
y_r = *x;
} else {
x_r = width - *x - 1;
y_r = height - *y - 1;
}
if (mirrored) {
x_r = width - x_r - 1;
}
*x = x_r;
*y = y_r;
}
static MPZBarCode
process_symbol(const MPZBarImage *image, int width, int height, const zbar_symbol_t *symbol)
{
if (image->rotation == 90 || image->rotation == 270) {
int tmp = width;
width = height;
height = tmp;
}
MPZBarCode code;
unsigned loc_size = zbar_symbol_get_loc_size(symbol);
@ -100,6 +144,10 @@ process_symbol(const zbar_symbol_t *symbol)
code.bounds_y[3] = max_y;
}
for (uint8_t i = 0; i < 4; ++i) {
map_coords(&code.bounds_x[i], &code.bounds_y[i], width, height, image->rotation, image->mirrored);
}
const char *data = zbar_symbol_get_data(symbol);
unsigned int data_size = zbar_symbol_get_data_length(symbol);
code.type = zbar_get_symbol_name(type);
@ -110,18 +158,26 @@ process_symbol(const zbar_symbol_t *symbol)
}
static void
process_surface(MPPipeline *pipeline, cairo_surface_t **_surface)
process_image(MPPipeline *pipeline, MPZBarImage **_image)
{
cairo_surface_t *surface = *_surface;
MPZBarImage *image = *_image;
int width = cairo_image_surface_get_width(surface);
int height = cairo_image_surface_get_height(surface);
const uint32_t *surface_data = (const uint32_t *)cairo_image_surface_get_data(surface);
assert(image->pixel_format == MP_PIXEL_FMT_BGGR8
|| image->pixel_format == MP_PIXEL_FMT_GBRG8
|| image->pixel_format == MP_PIXEL_FMT_GRBG8
|| image->pixel_format == MP_PIXEL_FMT_RGGB8);
// Create a grayscale image for scanning from the current preview.
// Rotate/mirror correctly.
int width = image->width / 2;
int height = image->height / 2;
// Create a grayscale image for scanning from the current preview
uint8_t *data = malloc(width * height * sizeof(uint8_t));
for (size_t i = 0; i < width * height; ++i) {
data[i] = (surface_data[i] >> 16) & 0xff;
size_t i = 0;
for (int y = 0; y < image->height; y += 2) {
for (int x = 0; x < image->width; x += 2) {
data[++i] = image->data[x + image->width * y];
}
}
// Create image for zbar
@ -140,7 +196,7 @@ process_surface(MPPipeline *pipeline, cairo_surface_t **_surface)
const zbar_symbol_t *symbol = zbar_image_first_symbol(zbar_image);
for (int i = 0; i < MIN(res, 8); ++i) {
assert(symbol != NULL);
result->codes[i] = process_symbol(symbol);
result->codes[i] = process_symbol(image, width, height, symbol);
symbol = zbar_symbol_next(symbol);
}
@ -150,22 +206,57 @@ process_surface(MPPipeline *pipeline, cairo_surface_t **_surface)
}
zbar_image_destroy(zbar_image);
cairo_surface_destroy(surface);
mp_zbar_image_unref(image);
++frames_processed;
}
void
mp_zbar_pipeline_process_image(cairo_surface_t *surface)
mp_zbar_pipeline_process_image(MPZBarImage *image)
{
// If we haven't processed the previous frame yet, drop this one
if (frames_received != frames_processed) {
cairo_surface_destroy(surface);
mp_zbar_image_unref(image);
return;
}
++frames_received;
mp_pipeline_invoke(pipeline, (MPPipelineCallback)process_surface, &surface,
sizeof(cairo_surface_t *));
mp_pipeline_invoke(pipeline, (MPPipelineCallback)process_image, &image,
sizeof(MPZBarImage *));
}
MPZBarImage *
mp_zbar_image_new(uint8_t *data,
MPPixelFormat pixel_format,
int width,
int height,
int rotation,
bool mirrored)
{
MPZBarImage *image = malloc(sizeof(MPZBarImage));
image->data = data;
image->pixel_format = pixel_format;
image->width = width;
image->height = height;
image->rotation = rotation;
image->mirrored = mirrored;
image->ref_count = 1;
return image;
}
MPZBarImage *
mp_zbar_image_ref(MPZBarImage *image)
{
++image->ref_count;
return image;
}
void
mp_zbar_image_unref(MPZBarImage *image)
{
if (--image->ref_count == 0) {
free(image->data);
free(image);
}
}

13
src/zbar_pipeline.h
View File

@ -2,7 +2,7 @@
#include "camera_config.h"
typedef struct _cairo_surface cairo_surface_t;
typedef struct _MPZBarImage MPZBarImage;
typedef struct {
int bounds_x[4];
@ -19,4 +19,13 @@ typedef struct {
void mp_zbar_pipeline_start();
void mp_zbar_pipeline_stop();
void mp_zbar_pipeline_process_image(cairo_surface_t *surface);
void mp_zbar_pipeline_process_image(MPZBarImage *image);
MPZBarImage *mp_zbar_image_new(uint8_t *data,
MPPixelFormat pixel_format,
int width,
int height,
int rotation,
bool mirrored);
MPZBarImage *mp_zbar_image_ref(MPZBarImage *image);
void mp_zbar_image_unref(MPZBarImage *image);