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PCL printer: filter out all the HP PJL stuff in order to produce clean prints using Windows 3.1x drivers.

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This commit is contained in:
OBattler
2026-01-11 07:32:22 +01:00
parent 990363667f
commit e5d2995352
1 changed files with 60 additions and 15 deletions
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75
src/printer/prt_ps.c
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@@ -77,9 +77,12 @@ typedef struct ps_t {
bool error;
bool autofeed;
bool pcl;
bool pcl_escape;
bool pending;
bool pjl;
bool pjl_command;
uint8_t ctrl;
uint8_t pcl_escape;
uint16_t pjl_command_start;
char printer_path[260];
@@ -286,23 +289,65 @@ process_data(ps_t *dev)
{
/* On PCL, check for escape sequences. */
if (dev->pcl) {
if (dev->data == 0x1B)
dev->pcl_escape = true;
else if (dev->pcl_escape) {
dev->pcl_escape = false;
if (dev->data == 0xE) {
dev->buffer[dev->buffer_pos++] = dev->data;
dev->buffer[dev->buffer_pos] = 0;
if (dev->pjl) {
dev->buffer[dev->buffer_pos++] = dev->data;
if (dev->buffer_pos > 2)
write_buffer(dev, true);
return;
/* Filter out any PJL commands. */
if (dev->pjl_command && (dev->data == '\n')) {
dev->pjl_command = false;
if (!memcmp(&(dev->buffer[dev->pjl_command_start]), "@PJL ENTER LANGUAGE=PCL", 0x17))
dev->pjl = false;
else if (!memcmp(&(dev->buffer[dev->pjl_command_start]), "@PJL ENTER LANGUAGE=POSTSCRIPT", 0x1e))
fatal("Printing PostScript using the PCL printer is not (yet) supported!\n");
dev->buffer_pos = dev->pjl_command_start;
} else if (!dev->pjl_command && (dev->buffer_pos >= 0x05) && !memcmp(&(dev->buffer[dev->buffer_pos - 0x5]), "@PJL ", 0x05)) {
dev->pjl_command = true;
dev->pjl_command_start = dev->buffer_pos - 0x05;
}
dev->buffer[dev->buffer_pos] = 0;
return;
} else if (dev->data == 0x1b)
dev->pcl_escape = 1;
else switch (dev->pcl_escape) {
case 1:
dev->pcl_escape = (dev->data == 0x25) ? 2 : 0;
if (dev->data == 0x0e) {
dev->buffer[dev->buffer_pos++] = dev->data;
dev->buffer[dev->buffer_pos] = 0;
if (dev->buffer_pos > 2)
write_buffer(dev, true);
return;
}
break;
case 2:
dev->pcl_escape = (dev->data == 0x2d) ? 3 : 0;
break;
case 3:
dev->pcl_escape = (dev->data == 0x31) ? 4 : 0;
break;
case 4:
dev->pcl_escape = (dev->data == 0x32) ? 5 : 0;
break;
case 5:
dev->pcl_escape = (dev->data == 0x33) ? 6 : 0;
break;
case 6:
dev->pcl_escape = (dev->data == 0x34) ? 7 : 0;
break;
case 7:
dev->pcl_escape = (dev->data == 0x35) ? 8 : 0;
break;
case 8:
dev->pcl_escape = 0;
if (dev->data == 0x58)
dev->pjl = true;
break;
}
}
/* On PostScript, check for non-printable characters. */
else if ((dev->data < 0x20) || (dev->data == 0x7f)) {
} else if ((dev->data < 0x20) || (dev->data == 0x7f)) {
/* On PostScript, check for non-printable characters. */
switch (dev->data) {
/* The following characters are considered white-space
by the PostScript specification */