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Diffstat (limited to 'backend/epsonds-ops.c')
| -rw-r--r-- | backend/epsonds-ops.c | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/backend/epsonds-ops.c b/backend/epsonds-ops.c new file mode 100644 index 0000000..94f1071 --- /dev/null +++ b/backend/epsonds-ops.c @@ -0,0 +1,474 @@ +/* + * epsonds-ops.c - Epson ESC/I-2 driver, support routines. + * + * Copyright (C) 2015 Tower Technologies + * Author: Alessandro Zummo <a.zummo@towertech.it> + * + * This file is part of the SANE package. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, version 2. + */ + +#define DEBUG_DECLARE_ONLY + +#include "sane/config.h" + +#include <unistd.h> /* sleep */ +#ifdef HAVE_SYS_SELECT_H +#include <sys/select.h> +#endif + +#include "epsonds.h" +#include "epsonds-io.h" +#include "epsonds-ops.h" +#include "epsonds-cmd.h" + +extern struct mode_param mode_params[]; + +/* Define the different scan sources */ + +#define FBF_STR SANE_I18N("Flatbed") +#define TPU_STR SANE_I18N("Transparency Unit") +#define ADF_STR SANE_I18N("Automatic Document Feeder") + +extern SANE_String_Const source_list[]; + +void +eds_dev_init(epsonds_device *dev) +{ + dev->res_list = malloc(sizeof(SANE_Word)); + dev->res_list[0] = 0; + + dev->depth_list = malloc(sizeof(SANE_Word)); + dev->depth_list[0] = 0; +} + +SANE_Status +eds_dev_post_init(struct epsonds_device *dev) +{ + DBG(10, "%s\n", __func__); + + SANE_String_Const *source_list_add = source_list; + if (dev->has_fb) + *source_list_add++ = FBF_STR; + + if (dev->has_adf) + *source_list_add++ = ADF_STR; + + if (source_list[0] == 0 + || (dev->res_list[0] == 0 && dev->dpi_range.min == 0) + || dev->depth_list[0] == 0) { + + DBG(1, "something is wrong in the discovery process, aborting.\n"); + DBG(1, "sources: %ld, res: %d, depths: %d.\n", + source_list_add - source_list, dev->res_list[0], dev->depth_list[0]); + + return SANE_STATUS_INVAL; + } + + return SANE_STATUS_GOOD; +} + +SANE_Status +eds_add_resolution(epsonds_device *dev, int r) +{ + DBG(10, "%s: add (dpi): %d\n", __func__, r); + + /* first element is the list size */ + dev->res_list[0]++; + dev->res_list = realloc(dev->res_list, + (dev->res_list[0] + 1) * + sizeof(SANE_Word)); + if (dev->res_list == NULL) + return SANE_STATUS_NO_MEM; + + dev->res_list[dev->res_list[0]] = r; + + return SANE_STATUS_GOOD; +} + +SANE_Status +eds_set_resolution_range(epsonds_device *dev, int min, int max) +{ + DBG(10, "%s: set min/max (dpi): %d/%d\n", __func__, min, max); + + dev->dpi_range.min = min; + dev->dpi_range.max = max; + dev->dpi_range.quant = 1; + + return SANE_STATUS_GOOD; +} + +void +eds_set_fbf_area(epsonds_device *dev, int x, int y, int unit) +{ + if (x == 0 || y == 0) + return; + + dev->fbf_x_range.min = 0; + dev->fbf_x_range.max = SANE_FIX(x * MM_PER_INCH / unit); + dev->fbf_x_range.quant = 0; + + dev->fbf_y_range.min = 0; + dev->fbf_y_range.max = SANE_FIX(y * MM_PER_INCH / unit); + dev->fbf_y_range.quant = 0; + + DBG(5, "%s: %f,%f %f,%f %d [mm]\n", + __func__, + SANE_UNFIX(dev->fbf_x_range.min), + SANE_UNFIX(dev->fbf_y_range.min), + SANE_UNFIX(dev->fbf_x_range.max), + SANE_UNFIX(dev->fbf_y_range.max), unit); +} + +void +eds_set_adf_area(struct epsonds_device *dev, int x, int y, int unit) +{ + dev->adf_x_range.min = 0; + dev->adf_x_range.max = SANE_FIX(x * MM_PER_INCH / unit); + dev->adf_x_range.quant = 0; + + dev->adf_y_range.min = 0; + dev->adf_y_range.max = SANE_FIX(y * MM_PER_INCH / unit); + dev->adf_y_range.quant = 0; + + DBG(5, "%s: %f,%f %f,%f %d [mm]\n", + __func__, + SANE_UNFIX(dev->adf_x_range.min), + SANE_UNFIX(dev->adf_y_range.min), + SANE_UNFIX(dev->adf_x_range.max), + SANE_UNFIX(dev->adf_y_range.max), unit); +} + +void +eds_set_tpu_area(struct epsonds_device *dev, int x, int y, int unit) +{ + dev->tpu_x_range.min = 0; + dev->tpu_x_range.max = SANE_FIX(x * MM_PER_INCH / unit); + dev->tpu_x_range.quant = 0; + + dev->tpu_y_range.min = 0; + dev->tpu_y_range.max = SANE_FIX(y * MM_PER_INCH / unit); + dev->tpu_y_range.quant = 0; + + DBG(5, "%s: %f,%f %f,%f %d [mm]\n", + __func__, + SANE_UNFIX(dev->tpu_x_range.min), + SANE_UNFIX(dev->tpu_y_range.min), + SANE_UNFIX(dev->tpu_x_range.max), + SANE_UNFIX(dev->tpu_y_range.max), unit); +} + +SANE_Status +eds_add_depth(epsonds_device *dev, SANE_Word depth) +{ + DBG(5, "%s: add (bpp): %d\n", __func__, depth); + + /* > 8bpp not implemented yet */ + if (depth > 8) { + DBG(1, " not supported"); + return SANE_STATUS_GOOD; + } + + if (depth > dev->max_depth) + dev->max_depth = depth; + + /* first element is the list size */ + dev->depth_list[0]++; + dev->depth_list = realloc(dev->depth_list, + (dev->depth_list[0] + 1) * + sizeof(SANE_Word)); + + if (dev->depth_list == NULL) + return SANE_STATUS_NO_MEM; + + dev->depth_list[dev->depth_list[0]] = depth; + + return SANE_STATUS_GOOD; +} + +SANE_Status +eds_init_parameters(epsonds_scanner *s) +{ + int dpi, bytes_per_pixel; + + memset(&s->params, 0, sizeof(SANE_Parameters)); + + s->dummy = 0; + + dpi = s->val[OPT_RESOLUTION].w; + + if (SANE_UNFIX(s->val[OPT_BR_Y].w) == 0 || + SANE_UNFIX(s->val[OPT_BR_X].w) == 0) + return SANE_STATUS_INVAL; + + s->left = ((SANE_UNFIX(s->val[OPT_TL_X].w) / MM_PER_INCH) * + s->val[OPT_RESOLUTION].w) + 0.5; + + s->top = ((SANE_UNFIX(s->val[OPT_TL_Y].w) / MM_PER_INCH) * + s->val[OPT_RESOLUTION].w) + 0.5; + + s->params.pixels_per_line = + ((SANE_UNFIX(s->val[OPT_BR_X].w - + s->val[OPT_TL_X].w) / MM_PER_INCH) * dpi) + 0.5; + s->params.lines = + ((SANE_UNFIX(s->val[OPT_BR_Y].w - + s->val[OPT_TL_Y].w) / MM_PER_INCH) * dpi) + 0.5; + + DBG(5, "%s: tlx %f tly %f brx %f bry %f [mm]\n", + __func__, + SANE_UNFIX(s->val[OPT_TL_X].w), SANE_UNFIX(s->val[OPT_TL_Y].w), + SANE_UNFIX(s->val[OPT_BR_X].w), SANE_UNFIX(s->val[OPT_BR_Y].w)); + + DBG(5, "%s: tlx %d tly %d brx %d bry %d [dots @ %d dpi]\n", + __func__, s->left, s->top, + s->params.pixels_per_line, s->params.lines, dpi); + + /* center aligned? */ + if (s->hw->alignment == 1) { + + SANE_Int offset = ((SANE_UNFIX(s->hw->x_range->max) / MM_PER_INCH) * dpi) + 0.5; + + s->left += ((offset - s->params.pixels_per_line) / 2); + + DBG(5, "%s: centered to tlx %d tly %d brx %d bry %d [dots @ %d dpi]\n", + __func__, s->left, s->top, + s->params.pixels_per_line, s->params.lines, dpi); + } + + /* + * Calculate bytes_per_pixel and bytes_per_line for + * any color depths. + * + * The default color depth is stored in mode_params.depth: + */ + + if (mode_params[s->val[OPT_MODE].w].depth == 1) + s->params.depth = 1; + else + s->params.depth = s->val[OPT_DEPTH].w; + + /* this works because it can only be set to 1, 8 or 16 */ + bytes_per_pixel = s->params.depth / 8; + if (s->params.depth % 8) { /* just in case ... */ + bytes_per_pixel++; + } + + /* pixels_per_line is rounded to the next 8bit boundary */ + s->params.pixels_per_line = s->params.pixels_per_line & ~7; + + s->params.last_frame = SANE_TRUE; + + switch (s->val[OPT_MODE].w) { + case MODE_BINARY: + case MODE_GRAY: + s->params.format = SANE_FRAME_GRAY; + s->params.bytes_per_line = + s->params.pixels_per_line * s->params.depth / 8; + break; + case MODE_COLOR: + s->params.format = SANE_FRAME_RGB; + s->params.bytes_per_line = + 3 * s->params.pixels_per_line * bytes_per_pixel; + break; + } + + if (s->params.bytes_per_line == 0) { + DBG(1, "bytes_per_line is ZERO\n"); + return SANE_STATUS_INVAL; + } + + /* + * If (s->top + s->params.lines) is larger than the max scan area, reset + * the number of scan lines: + * XXX: precalculate the maximum scanning area elsewhere (use dev max_y) + */ + + if (SANE_UNFIX(s->val[OPT_BR_Y].w) / MM_PER_INCH * dpi < + (s->params.lines + s->top)) { + s->params.lines = + ((int) SANE_UNFIX(s->val[OPT_BR_Y].w) / MM_PER_INCH * + dpi + 0.5) - s->top; + } + + if (s->params.lines <= 0) { + DBG(1, "wrong number of lines: %d\n", s->params.lines); + return SANE_STATUS_INVAL; + } + + return SANE_STATUS_GOOD; +} + +void +eds_copy_image_from_ring(epsonds_scanner *s, SANE_Byte *data, SANE_Int max_length, + SANE_Int *length) +{ + int lines, available; + int hw_line_size = (s->params.bytes_per_line + s->dummy); + + /* trim max_length to a multiple of hw_line_size */ + max_length -= (max_length % hw_line_size); + + /* check available data */ + available = eds_ring_avail(s->current); + if (max_length > available) + max_length = available; + + lines = max_length / hw_line_size; + + DBG(18, "copying %d lines (%d, %d)\n", lines, s->params.bytes_per_line, s->dummy); + + /* need more data? */ + if (lines == 0) { + *length = 0; + return; + } + + *length = (lines * s->params.bytes_per_line); + + /* we need to copy one line at time, skipping + * dummy bytes at the end of each line + */ + + /* lineart */ + if (s->params.depth == 1) { + + while (lines--) { + + eds_ring_read(s->current, s->line_buffer, s->params.bytes_per_line); + eds_ring_skip(s->current, s->dummy); + + int i; + + SANE_Byte *p = s->line_buffer; + + for (i = 0; i < s->params.bytes_per_line; i++) { + *data++ = ~*p++; + } + } + + } else { /* gray and color */ + + while (lines--) { + + eds_ring_read(s->current, data, s->params.bytes_per_line); + eds_ring_skip(s->current, s->dummy); + + data += s->params.bytes_per_line; + + } + } +} + +SANE_Status eds_ring_init(ring_buffer *ring, SANE_Int size) +{ + ring->ring = realloc(ring->ring, size); + if (!ring->ring) { + return SANE_STATUS_NO_MEM; + } + + ring->size = size; + ring->fill = 0; + ring->end = ring->ring + size; + ring->wp = ring->rp = ring->ring; + + return SANE_STATUS_GOOD; +} + +SANE_Status eds_ring_write(ring_buffer *ring, SANE_Byte *buf, SANE_Int size) +{ + if (size > (ring->size - ring->fill)) { + DBG(1, "ring buffer full, requested: %d, available: %d\n", size, ring->size - ring->fill); + return SANE_STATUS_NO_MEM; + } + + SANE_Int tail = ring->end - ring->wp; + if (size < tail) { + + memcpy(ring->wp, buf, size); + + ring->wp += size; + ring->fill += size; + + } else { + + memcpy(ring->wp, buf, tail); + size -= tail; + + ring->wp = ring->ring; + memcpy(ring->wp, buf + tail, size); + + ring->wp += size; + ring->fill += (tail + size); + } + + return SANE_STATUS_GOOD; +} + +SANE_Int eds_ring_read(ring_buffer *ring, SANE_Byte *buf, SANE_Int size) +{ + DBG(18, "reading from ring, %d bytes available\n", (int)ring->fill); + + /* limit read to available */ + if (size > ring->fill) { + DBG(1, "not enough data in the ring, shouldn't happen\n"); + size = ring->fill; + } + + SANE_Int tail = ring->end - ring->rp; + if (size < tail) { + + memcpy(buf, ring->rp, size); + + ring->rp += size; + ring->fill -= size; + + return size; + + } else { + + memcpy(buf, ring->rp, tail); + size -= tail; + + ring->rp = ring->ring; + memcpy(buf + tail, ring->rp, size); + + ring->rp += size; + ring->fill -= (size + tail); + + return size + tail; + } +} + +SANE_Int eds_ring_skip(ring_buffer *ring, SANE_Int size) +{ + /* limit skip to available */ + if (size > ring->fill) + size = ring->fill; + + SANE_Int tail = ring->end - ring->rp; + if (size < tail) { + ring->rp += size; + } else { + + ring->rp = ring->ring + (size - tail); + } + + ring->fill -= size; + + return size; +} + +SANE_Int eds_ring_avail(ring_buffer *ring) +{ + return ring->fill; +} + +void eds_ring_flush(ring_buffer *ring) +{ + eds_ring_skip(ring, ring->fill); +} + + |