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ScannerWindow.cpp
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ScannerWindow.cpp
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#include <Application.h>
#include <Box.h>
#include <LayoutBuilder.h>
#include <Menu.h>
#include <MenuBar.h>
#include <MenuField.h>
#include <MenuItem.h>
#include <PopUpMenu.h>
#include <ScrollView.h>
#include <StorageKit.h>
#include <SupportKit.h>
#include <TranslationKit.h>
#include <Window.h>
#include <Catalog.h>
#include <IconUtils.h>
#include "Sanity.h"
#include "ScannerWindow.h"
#include "ControlsWindow.h"
#include "PreviewView.h"
#include "TranslatorSavePanel.h"
#include "StackView.h"
#include "CollapsableBox.h"
#include "ScannerOptionView.h"
#include "ScannerInfoView.h"
#include "SaneUtils.h"
#include <BeBuild.h>
#undef B_TRANSLATION_CONTEXT
#define B_TRANSLATION_CONTEXT "ScannerWindow"
ScannerWindow::ScannerWindow(BRect frame, BBitmap **outBitmap)
: BWindow(frame, SOFTWARE_NAME, B_TITLED_WINDOW_LOOK, B_NORMAL_WINDOW_FEEL,
B_AUTO_UPDATE_SIZE_LIMITS | B_ASYNCHRONOUS_CONTROLS)
{
BMenuBar * menu_bar;
BMenu * file_menu;
BMenu * opt_menu;
BMenuItem * item;
BMenuField * menu_field;
m_icon = NULL;
m_image = NULL;
m_save_panel = NULL;
m_translator_out_bitmap = outBitmap;
m_standalone = !outBitmap; /* act as an app */
menu_bar = new BMenuBar("menu_bar");
file_menu = new BMenu(B_TRANSLATE("File"));
file_menu->AddItem(new BMenuItem(B_TRANSLATE("Save as" B_UTF8_ELLIPSIS), new BMessage(SAVE_AS_MSG)));
file_menu->AddSeparatorItem();
item = new BMenuItem(B_TRANSLATE("About"), new BMessage(B_ABOUT_REQUESTED));
item->SetTarget(be_app);
file_menu->AddItem(item);
file_menu->AddSeparatorItem();
item = new BMenuItem(B_TRANSLATE("Quit"), new BMessage(B_QUIT_REQUESTED), 'Q');
item->SetTarget(be_app);
file_menu->AddItem(item);
opt_menu = new BMenu(B_TRANSLATE("Options"));
opt_menu->AddItem(new BMenuItem(B_TRANSLATE("Create device-wrapper files"), new BMessage(CREATE_DEV_MSG)));
opt_menu->AddItem(new BMenuItem(B_TRANSLATE("Choose wrapper directory" B_UTF8_ELLIPSIS) , new BMessage(CHDIR_DEV_MSG)));
opt_menu->AddSeparatorItem();
opt_menu->AddItem(new BMenuItem(B_TRANSLATE("Force device detection"), new BMessage(FORCE_DEV_MSG)));
menu_bar->AddItem(file_menu);
menu_bar->AddItem(opt_menu);
if (!m_standalone)
menu_bar->Hide();
// Add a scan panel
m_panel = new BBox("panel", B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE_JUMP, B_PLAIN_BORDER);
m_preview_view = new PreviewView(BRect(0, 0, 2100, 2970));
m_device = NULL;
m_device_info = NULL;
m_devices_roster_thread_id = -1;
m_scan_thread_id = -1;
m_devices_menu = new BPopUpMenu(B_TRANSLATE("<none available>"));
m_devices_menu->SetRadioMode(true);
menu_field = new BMenuField("device_menu", B_TRANSLATE( DEVICE_LABEL ), m_devices_menu,
B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE);
menu_field->SetToolTip(B_TRANSLATE("Please select a device"));
m_accept_button = new BButton("Accept", B_TRANSLATE("Accept"), new BMessage(ACCEPT_MSG),
B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE);
m_accept_button->SetEnabled(true);
m_accept_button->SetToolTip(B_TRANSLATE("Accept the current picture."));
m_save_as_button = new BButton("Save As", B_TRANSLATE("Save as" B_UTF8_ELLIPSIS),
new BMessage(SAVE_AS_MSG), B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE);
m_save_as_button->SetToolTip(B_TRANSLATE("Save scanned image as" B_UTF8_ELLIPSIS));
if (m_standalone) {
m_save_as_button->SetEnabled(false);
m_accept_button->Hide();
} else {
m_accept_button->SetEnabled(false);
m_save_as_button->Hide();
}
m_preview_button = new BButton("Preview", B_TRANSLATE(PREVIEW_LABEL), new BMessage(PREVIEW_MSG),
B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE);
m_preview_button->SetToolTip(B_TRANSLATE("Start the scan process for preview"));
m_preview_button->MakeDefault(true);
m_scan_button = new BButton("Scan", B_TRANSLATE(SCAN_LABEL), new BMessage(SCAN_MSG),
B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE);
m_scan_button->SetToolTip(B_TRANSLATE("Start the scan process"));
m_close_button = new BButton("Close", B_TRANSLATE("Close"), new BMessage(B_QUIT_REQUESTED),
B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE);
m_close_button->SetToolTip(B_TRANSLATE("Close application"));
m_status_bar = new BStatusBar("StatusBar");
m_status_bar->SetFlags(m_status_bar->Flags() | (B_WILL_DRAW | B_FRAME_EVENTS));
char app_path[B_PATH_NAME_LENGTH + 1];
if (GetBinaryPath(app_path, (void*)GetBinaryPath) == B_OK) {
BNode node(app_path);
m_icon = new BBitmap(BRect(0, 0, 31, 31), B_RGBA32);
if (BIconUtils::GetVectorIcon(&node, "BEOS:ICON", m_icon) != B_OK) {
delete m_icon;
m_icon = NULL;
}
}
BLayoutBuilder::Group<>(this, B_VERTICAL, 0)
.SetInsets(0, 0, 0, 0)
.Add(menu_bar)
.AddSplit(B_HORIZONTAL, 0)
.AddGroup(B_VERTICAL, B_USE_HALF_ITEM_SPACING)
.SetInsets( B_USE_HALF_ITEM_SPACING, B_USE_HALF_ITEM_SPACING,
B_USE_HALF_ITEM_SPACING, B_USE_HALF_ITEM_SPACING)
.Add(menu_field)
.Add(m_panel)
.Add(m_status_bar)
.End()
.AddGroup(B_VERTICAL, 0)
.SetInsets( B_USE_HALF_ITEM_SPACING, B_USE_HALF_ITEM_SPACING,
B_USE_HALF_ITEM_SPACING, B_USE_HALF_ITEM_SPACING)
.Add(m_preview_view)
.AddGroup(B_HORIZONTAL, B_USE_DEFAULT_SPACING)
.SetInsets(0, B_USE_DEFAULT_SPACING, 0, 0)
.SetExplicitAlignment(BAlignment(B_ALIGN_CENTER, B_ALIGN_BOTTOM))
.AddGlue()
.Add(m_preview_button)
.Add(m_scan_button)
.Add(m_accept_button)
.Add(m_save_as_button)
.AddGlue()
.End()
.End()
.End()
.End();
m_options_stack = NULL;
m_options_scroller = NULL;
CenterOnScreen();
RescanDevices();
}
// --------------------------------------------------------------
ScannerWindow::~ScannerWindow()
{
status_t ret;
if ( DevicesRosterThreadID() >= 0 )
wait_for_thread(DevicesRosterThreadID(), &ret);
if ( m_device )
sane_close(m_device);
// wait_thread(m_devices_roster_thread_id);
delete m_image;
delete m_save_panel;
}
// --------------------------------------------------------------
bool ScannerWindow::QuitRequested()
{
if (m_standalone)
be_app->PostMessage(B_QUIT_REQUESTED);
else {
Lock();
Quit();
}
return true;
}
// --------------------------------------------------------------
void ScannerWindow::MessageReceived (BMessage * msg)
{
switch (msg->what)
{
case SAVE_AS_MSG: {
if ( ! m_image ) {
BAlert *alert = new BAlert(NULL, B_TRANSLATE("No image to save."), B_TRANSLATE("Doh!"),
NULL, NULL, B_WIDTH_AS_USUAL, B_STOP_ALERT);
alert->Go();
break;
};
if ( ! m_save_panel )
m_save_panel = new TranslatorSavePanel(B_TRANSLATE("TranslatorSavePanel"),
new BMessenger(this), NULL, 0, false,
new BMessage(SAVE_FILE_PANEL_MSG));
m_save_panel->Window()->SetWorkspaces(B_CURRENT_WORKSPACE);
m_save_panel->Show();
break;
};
case SAVE_FILE_PANEL_MSG: {
// Recover the necessary data from the message
translator_id * id;
uint32 format;
ssize_t length = sizeof(translator_id);
if ( msg->FindData("translator_id", B_RAW_TYPE, (const void **)&id, &length) != B_OK)
break;
if ( msg->FindInt32("translator_format", (int32 *)&format) != B_OK)
break;
entry_ref dir;
if ( msg->FindRef("directory", &dir) != B_OK)
break;
BDirectory bdir(&dir);
const char *name;
if ( msg->FindString("name", &name) != B_OK)
break;
if ( name == NULL )
break;
// Clobber any existing file or create a new one if it didn't exist
BFile file(&bdir, name, B_WRITE_ONLY | B_CREATE_FILE | B_ERASE_FILE);
if (file.InitCheck() != B_OK) {
BAlert *alert = new BAlert(NULL, B_TRANSLATE("Could not create file."), B_TRANSLATE("OK"));
alert->Go();
break;
};
BTranslatorRoster * roster = BTranslatorRoster::Default();
BBitmapStream stream(m_image);
// If the id is no longer valid or the translator fails for any other
// reason, catch it here
if ( roster->Translate(*id, &stream, NULL, &file, format) != B_OK) {
BAlert * alert = new BAlert(NULL, B_TRANSLATE("Could not save the image."), B_TRANSLATE("OK"));
alert->Go();
};
// Reclaim the ownership of the bitmap, otherwise it would be deleted
// when stream passes out of scope
stream.DetachBitmap(&m_image);
break;
};
case SET_DEVICE_BY_NAME_MSG:
{
ssize_t data_size;
const SANE_Device * device_info = NULL;
BMenuItem *item;
BMessage *itemMsg;
BMessage setDevMsg(SET_DEVICE_MSG);
BString dev;
int i;
if ( msg->FindString("device", &dev) != B_OK )
break;
msg->PrintToStream();
for (i = 0; m_devices_menu->ItemAt(i); i++) {
printf("checking dev %d\n", i);
item = m_devices_menu->ItemAt(i);
itemMsg = item->Message();
itemMsg->PrintToStream();
if ( !itemMsg )
continue;
if ( itemMsg->FindPointer("device", (void **) &device_info) != B_OK )
continue;
printf("CMP: %s:%s\n", dev.String(), device_info->name);
if ( dev == device_info->name ) {
item->SetMarked(true);
setDevMsg.AddPointer("device", device_info);
BMessenger msgr(this);
msgr.SendMessage(&setDevMsg);
break;
}
}
break;
}
case SCAN_MSG: {
if ( ! m_device )
break;
if ( m_scan_thread_id != -1 ) {
// already launched...
m_cancel_scan = true;
break;
};
m_preview_mode = false;
SetImage(NULL);
m_preview_view->SetImageFrame();
m_scan_thread_id = spawn_thread(_ScanThread, "scan", B_NORMAL_PRIORITY, this);
resume_thread(m_scan_thread_id);
break;
};
case PREVIEW_MSG: {
if ( ! m_device )
break;
if ( m_scan_thread_id != -1 ) {
// already launched...
m_cancel_scan = true;
break;
};
m_preview_mode = true;
SetImage(NULL);
m_preview_view->SetFrame(m_preview_view->GetGeometry());
m_preview_view->SetImageFrame();
BMessage *msg = new BMessage(ScannerWindow::PARAM_CHANGED_MSG);
msg->AddRect("rect", m_preview_view->GetGeometry());
PostMessage(msg);
m_scan_thread_id = spawn_thread(_ScanThread, "scan", B_NORMAL_PRIORITY, this);
resume_thread(m_scan_thread_id);
break;
};
case SET_DEVICE_MSG:
SetDevice(msg);
m_preview_button->MakeDefault(true);
if (m_standalone && m_save_as_button->IsEnabled()) {
m_save_as_button->SetEnabled(false);
}
PostMessage(FORMAT_CHANGED_MSG);
break;
case FORMAT_CHANGED_MSG: {
SANE_Status status;
SANE_Parameters parm;
if (!m_device)
break;
status = sane_get_parameters(m_device, &parm);
if (status == SANE_STATUS_GOOD) {
switch (parm.format) {
case SANE_FRAME_GRAY: printf("SANE_FRAME_GRAY\n"); break;
case SANE_FRAME_RGB: printf("SANE_FRAME_RGB\n"); break;
case SANE_FRAME_RED: printf("SANE_FRAME_RED\n"); break;
case SANE_FRAME_GREEN: printf("SANE_FRAME_RED\n"); break;
case SANE_FRAME_BLUE: printf("SANE_FRAME_RED\n"); break;
default:
printf("unknown (%d) frame format!\n", parm.format);
};
BRect geometry(0, 0, parm.pixels_per_line, parm.lines);
BRect frame = geometry;
if ( m_tl_x != NULL && m_tl_y != NULL && m_br_x != NULL && m_br_y != NULL) {
geometry.Set(0, 0, GetSaneMaxFloat(m_device, SANE_NAME_SCAN_BR_X),
GetSaneMaxFloat(m_device, SANE_NAME_SCAN_BR_Y));
frame.Set(GetSaneFloat(m_device, SANE_NAME_SCAN_TL_X),
GetSaneFloat(m_device, SANE_NAME_SCAN_TL_Y),
GetSaneFloat(m_device, SANE_NAME_SCAN_BR_X),
GetSaneFloat(m_device, SANE_NAME_SCAN_BR_Y));
}
m_preview_view->SetGeometry(geometry);
m_preview_view->SetFrame(frame);
} else
printf("sane_get_parameters: %s\n", sane_strstatus (status));
break;
};
case UPDATED_IMAGE_MSG: {
BRect r;
if ( msg->FindRect("updated_rect", &r) != B_OK )
break;
m_preview_view->Invalidate();
break;
};
case ACCEPT_MSG:
{
if ( ! m_image )
{
BAlert *alert = new BAlert(NULL, B_TRANSLATE("No image to save."), B_TRANSLATE("Doh!"),
NULL, NULL, B_WIDTH_AS_USUAL, B_STOP_ALERT);
alert->Go();
break;
};
if ( m_translator_out_bitmap ) {
*m_translator_out_bitmap = new BBitmap(m_image);
}
Quit();
break;
};
case PARAM_CHANGED_MSG:
{
if (!m_device)
break;
BRect rect;
if ( msg->FindRect("rect", &rect) != B_OK )
break;
if (m_tl_x) {
SetSaneFloat(m_device, SANE_NAME_SCAN_TL_X, rect.left <= rect.right ? rect.left : rect.right);
m_tl_x->UpdateValue();
}
if (m_tl_y) {
SetSaneFloat(m_device, SANE_NAME_SCAN_TL_Y, rect.top <= rect.bottom ? rect.top : rect.bottom);
m_tl_y->UpdateValue();
}
if (m_br_x) {
SetSaneFloat(m_device, SANE_NAME_SCAN_BR_X, rect.right >= rect.left ? rect.right : rect.left);
m_br_x->UpdateValue();
}
if (m_br_y) {
SetSaneFloat(m_device, SANE_NAME_SCAN_BR_Y, rect.bottom >=rect.top ? rect.bottom : rect.top);
m_br_y->UpdateValue();
}
PostMessage(FORMAT_CHANGED_MSG);
break;
}
default:
inherited::MessageReceived(msg);
}
}
// #pragma mark -
// --------------------------------------------------------------
status_t ScannerWindow::SetImage
(
BBitmap * bitmap
)
{
if (m_image == bitmap)
return B_OK;
if ( m_image)
delete m_image;
m_image = bitmap;
m_preview_view->SetBitmap(m_image);
return B_OK;
}
// --------------------------------------------------------------
status_t ScannerWindow::SetDevice(BMessage *msg)
{
SANE_Status status;
const SANE_Device * device_info;
SANE_Handle device;
if ( msg->FindPointer("device", (void **) &device_info) != B_OK )
return B_BAD_VALUE;
BString text;
if (device_info) {
if (device_info->vendor && strcmp("Noname", device_info->vendor) != 0)
text << device_info->vendor << " ";
if (device_info->model)
text << device_info->model << " ";
if (device_info->name)
text << B_TRANSLATE(" (") << device_info->name << ")";
}
SendNotify(BString("Initialize"), text);
// Close previous device opened, if any
if ( m_device )
sane_close(m_device);
// Try to
status = sane_open(device_info->name, &device);
if ( status != SANE_STATUS_GOOD ) {
fprintf (stderr, "sane_open(%s): %s\n", device_info->name, sane_strstatus (status));
BAlert * alert = new BAlert("sane_open", sane_strstatus(status), B_TRANSLATE("Argh"));
alert->Go();
// Reopen last dev
if ( m_device ) {
status = sane_open(m_device_info->name, &m_device);
if ( status != SANE_STATUS_GOOD ) {
m_device = NULL;
m_device_info = NULL;
}
}
return B_ERROR;
};
m_device = device;
m_device_info = device_info;
SetImage(NULL);
return BuildControls();
}
// --------------------------------------------------------------
status_t ScannerWindow::BuildControls()
{
// Build options panel
SANE_Status status;
const SANE_Option_Descriptor * desc;
BRect r;
PRINT(("Sanity:BuildControls()\n"));
m_tl_x = NULL;
m_tl_y = NULL;
m_br_x = NULL;
m_br_y = NULL;
if ( m_options_stack )
m_options_stack->RemoveSelf();
if (m_options_scroller)
m_options_scroller->RemoveSelf();
r = m_panel->Bounds();
r.right -= B_V_SCROLL_BAR_WIDTH + 32;
delete m_options_stack;
delete m_options_scroller;
m_options_stack = new StackView(r, "options_lv", B_FOLLOW_ALL_SIDES);
m_options_scroller = new BScrollView("options_sv", m_options_stack,
B_FOLLOW_ALL_SIDES,
B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE_JUMP,
false, true, // vertical scrollbar
B_PLAIN_BORDER); // B_FANCY_BORDER);
m_panel->AddChild(m_options_scroller);
// printf("Options for device %s:\n", m_device_info->name);
r = m_options_stack->Bounds();
CollapsableBox *box = NULL;
float box_height = 0;
float w;
BRect ovr = r;
int nb_advanced_opts = 0;
// skip first option (option 0 = number of options)
for (int opt = 1; (desc = sane_get_option_descriptor(m_device, opt)) != NULL; opt++) {
if ((desc->type == SANE_TYPE_FIXED || desc->type == SANE_TYPE_INT)
&& desc->size == sizeof (SANE_Int)
&& (desc->unit == SANE_UNIT_DPI)
&& (strcmp (desc->name, SANE_NAME_SCAN_RESOLUTION) == 0)) {
m_preview_resolution = 300;
int cnt = desc->constraint.word_list[0];
for (int i = 1; i <= cnt && desc->constraint.word_list[i]; i++) {
if ( desc->constraint.word_list[i] < m_preview_resolution )
m_preview_resolution = desc->constraint.word_list[i];
}
}
if (desc->cap & SANE_CAP_AUTOMATIC) {
status = sane_control_option(m_device, opt, SANE_ACTION_SET_AUTO, 0, 0);
if (status != SANE_STATUS_GOOD)
printf("failed to set option --%s to automatic (%s)\n", desc->name, sane_strstatus (status));
};
if (desc->type == SANE_TYPE_GROUP) {
if (box) {
box->ResizeTo(r.Width(), box_height + 2);
RemoveChild(box);
box->Show();
m_options_stack->AddChild(box);
if (nb_advanced_opts > (box->CountChildren() / 2))
// 50% of advanced options in this group: collapse it by default.
box->SetValue(B_CONTROL_OFF);
};
// new box
box = new CollapsableBox(r, desc->name, desc->title, new BMessage(StackView::RESTACK_MSG), B_FOLLOW_TOP | B_FOLLOW_LEFT_RIGHT);
box->SetTarget(m_options_stack);
box->GetPreferredSize(&w, &box_height);
box->SetFont(be_bold_font);
box->Hide();
AddChild(box);
ovr = box->Bounds();
ovr.InsetBy(6, 0);
nb_advanced_opts = 0;
continue;
};
// All options kind except "group" ones
if (!box) {
// No options group box created so far
// Create a default one, non collapsable (we don't have a group name!), to host them
box = new CollapsableBox(r, NULL, B_TRANSLATE("Main options"), new BMessage(StackView::RESTACK_MSG), B_FOLLOW_TOP | B_FOLLOW_LEFT_RIGHT);
box->SetTarget(m_options_stack);
box->GetPreferredSize(&w, &box_height);
box->SetFont(be_bold_font);
box->Hide();
AddChild(box);
box_height = 2;
ovr = box->Bounds();
ovr.InsetBy(6, 0);
nb_advanced_opts = 0;
};
ScannerOptionView * ov = new ScannerOptionView(ovr, desc->name, B_FOLLOW_TOP | B_FOLLOW_LEFT_RIGHT, 0,
m_device, opt);
ov->Hide();
AddChild(ov);
if (strcmp(desc->name, SANE_NAME_SCAN_TL_X)==0)m_tl_x = ov;
if (strcmp(desc->name, SANE_NAME_SCAN_TL_Y)==0)m_tl_y = ov;
if (strcmp(desc->name, SANE_NAME_SCAN_BR_X)==0)m_br_x = ov;
if (strcmp(desc->name, SANE_NAME_SCAN_BR_Y)==0)m_br_y = ov;
if ( ov->Build() != B_OK ) {
ov->RemoveSelf();
delete ov;
continue;
};
RemoveChild(ov);
ov->Show();
box->AddChild(ov);
ov->MoveTo(6, box_height);
box_height = ov->Frame().bottom;
if (desc->cap & SANE_CAP_ADVANCED)
nb_advanced_opts++;
if (strlen(desc->desc))
ov->SetToolTip(desc->desc);
} // for every scanner options
// add last group box
if (box) {
box->ResizeTo(r.Width(), box_height + 2);
RemoveChild(box);
box->Show();
m_options_stack->AddChild(box);
if (nb_advanced_opts > (box->CountChildren() / 2))
// 50% of advanced options in this group: collapse it by default.
box->SetValue(B_CONTROL_OFF);
};
// Add a pseudo control box, displaying some info about device/backends, whatever...
AddDeviceInfoBox();
// Modify window title
BString title = "";
title << SOFTWARE_NAME << " : ";
if (strcmp(m_device_info->vendor, "Noname") != 0)
title << m_device_info->vendor << " ";
if ( strlen(m_device_info->model) )
title << m_device_info->model;
SetTitle(title.String());
// m_options_scroller->MakeFocus();
m_options_stack->MakeFocus();
return B_OK;
}
// --------------------------------------------------------------
int32 ScannerWindow::ScanThread()
{
SANE_Status status;
int len;
SANE_Parameters parm;
BBitmap * image = NULL;
bool first_frame;
SANE_Int scan_resolution;
if (!m_device)
return B_ERROR;
Lock();
rgb_color default_color = m_status_bar->BarColor();
if (m_preview_mode) {
m_preview_button->SetLabel(B_TRANSLATE( "Cancel"));
m_scan_button->SetEnabled(false);
} else {
m_scan_button->SetLabel(B_TRANSLATE( "Cancel"));
m_preview_button->SetEnabled(false);
}
m_status_bar->Reset();
if (!m_standalone && m_accept_button->IsEnabled()) {
m_accept_button->SetEnabled(false);
}
if (m_standalone && m_save_as_button->IsEnabled()) {
m_save_as_button->SetEnabled(false);
}
Unlock();
if (m_preview_mode) {
scan_resolution = GetSaneInt(m_device, SANE_NAME_SCAN_RESOLUTION);
SetSaneInt(m_device, SANE_NAME_SCAN_RESOLUTION, m_preview_resolution);
}
first_frame = true;
m_cancel_scan = false;
do { // for each frame...
// start frame reading
if ( m_cancel_scan )
break;
status = sane_start(m_device);
if ( status != SANE_STATUS_GOOD ) {
fprintf (stderr, "sane_start: %s\n", sane_strstatus (status));
break;
};
// get frame parameters
status = sane_get_parameters(m_device, &parm);
if (status != SANE_STATUS_GOOD) {
fprintf (stderr, "sane_get_parameters: %s\n", sane_strstatus (status));
break;
};
if (parm.lines >= 0) {
float total_bytes = parm.bytes_per_line * parm.lines;
if (parm.format != SANE_FRAME_GRAY && parm.format != SANE_FRAME_RGB)
total_bytes *= 3.0;
Lock();
m_status_bar->SetMaxValue(total_bytes);
Unlock();
fprintf (stderr, "scanning image of size %dx%d pixels at "
"%d bits/pixel\n",
parm.pixels_per_line, parm.lines,
8 * parm.bytes_per_line / parm.pixels_per_line);
if (first_frame) {
image = new BBitmap(BRect(0, 0, parm.pixels_per_line - 1, parm.lines - 1),
((parm.depth == 1) ? B_GRAY1 : B_RGBA32));
if (! image) {
BAlert * alert = new BAlert("BBitmap", B_TRANSLATE("Failed to create image buffer"), B_TRANSLATE("Glup."));
alert->Go();
break;
};
// TODO: fill image with transparent background (B_TRANSPARENT_COLOR or alpha = 0)
};
} else {
fprintf (stderr, "scanning image %d pixels wide and "
"variable height at %d bits/pixel\n",
parm.pixels_per_line, 8 * parm.bytes_per_line / parm.pixels_per_line);
BAlert * alert = new BAlert("Well...", B_TRANSLATE("Variable height scanning not supported (yet?)"), B_TRANSLATE("Sorry"));
alert->Go();
break;
};
Lock();
PostMessage(FORMAT_CHANGED_MSG);
Unlock();
uint8 * buffer, * data;
uint8 * ptr;
int32 x, y;
int line_len;
int padding_bytes;
int channel;
rgb_color red_color = { 255, 0, 0, 255 };
rgb_color green_color = { 0, 255, 0, 255 };
rgb_color blue_color = { 0, 0, 255, 255 };
BRect updated_rect;
x = y = 0;
channel = 0;
updated_rect.Set(0, 0, parm.pixels_per_line, 0);
Lock();
switch(parm.format) {
case SANE_FRAME_RED:
channel = 2;
m_status_bar->SetBarColor(red_color);
break;
case SANE_FRAME_GREEN:
channel = 1;
m_status_bar->SetBarColor(green_color);
break;
case SANE_FRAME_BLUE:
channel = 0;
m_status_bar->SetBarColor(blue_color);
break;
default:
channel = 0;
m_status_bar->SetBarColor(default_color);
break;
};
Unlock();
buffer = (uint8 *) malloc(parm.bytes_per_line);
line_len = 0;
padding_bytes = 0;
while (1) { // read until end of frame or error
if ( m_cancel_scan )
break;
len = 0;
status = sane_read(m_device, buffer, parm.bytes_per_line, &len);
if (status == SANE_STATUS_EOF)
break;
if (status != SANE_STATUS_GOOD) {
fprintf (stderr, "sane_read: %s\n", sane_strstatus (status));
BAlert * alert = new BAlert("sane_read()", sane_strstatus(status), B_TRANSLATE("Glup."));
alert->Go();
break;
};
Lock();
m_status_bar->Update((float) len);
SetImage(image);
Unlock();
image->LockBits();
ptr = (uint8 *) image->Bits();
ptr += (y * image->BytesPerRow());
ptr += (4*x);
data = buffer;
while ( len > 0 ) {
if (padding_bytes) {
// eat any padding bytes
padding_bytes--;
data++;
len--;
continue;
};
switch (parm.format) {
case SANE_FRAME_RED:
case SANE_FRAME_GREEN:
case SANE_FRAME_BLUE: {
uint8 value;
if (parm.depth == 16) {
value = (*((uint16 *) data)) >> 8;
data += 2;
len -= 2;
line_len += 2;
} else {
value = *((uint8 *) data);
data++;
len--;
line_len++;
};
*(ptr + channel) = value;
*(ptr + 3) = 255; // Alpha channel
break;
};
case SANE_FRAME_RGB: {
uint8 red, green, blue;
if (parm.depth == 16) {
red = (*((uint16 *) data)) >> 8;
data += 2;
green = (*((uint16 *) data)) >> 8;
data += 2;
blue = (*((uint16 *) data)) >> 8;
data += 2;
len -= 6;
line_len += 6;
} else {
red = *((uint8 *) data++);
green = *((uint8 *) data++);
blue = *((uint8 *) data++);
len -= 3;
line_len += 3;
};
*ptr = blue;
*(ptr+1) = green;
*(ptr+2) = red; // red channel
*(ptr+3) = 255; // Alpha channel
break;
};
case SANE_FRAME_GRAY: {
uint8 value = 0;
if (parm.depth == 1 ) {
*ptr = *((uint8 *) data++);
len--;
line_len++;
break;
};
if (parm.depth == 16) {
value = (*((uint16 *) data)) >> 8;
data += 2;
len -= 2;
line_len += 2;
} else if ( parm.depth == 8 ) {
value = *((uint8 *) data++);
len--;
line_len++;
};
*ptr = value; // blue channel
*(ptr+1) = value; // green channel
*(ptr+2) = value; // red channel
*(ptr+3) = 255; // Alpha channel
break;
};
};
// Next pixel;
x += ((parm.depth == 1) ? 8 : 1);
ptr += ((image->ColorSpace() == B_GRAY1) ? 1 : 4);
if ( x >= parm.pixels_per_line ) {
y++;
if ( y >= parm.lines )
break;
x = 0;
padding_bytes = parm.bytes_per_line - line_len;
line_len = 0;
// skip end of row padding bytes...
ptr = (uint8 *) image->Bits();
ptr += (y * image->BytesPerRow());
};
};
image->UnlockBits();
BMessage * msg = new BMessage(UPDATED_IMAGE_MSG);
updated_rect.bottom = y;
msg->AddRect("updated_rect", updated_rect);