SVG印刷対応とメディア情報APIを追加
SVG入力を現在テープ幅に自動フィットして印刷できるようにし、アプリ側が余白計算できるようにテープ幅・DPI・最小送り量を取得するAPIを追加する。 Made-with: Cursor
This commit is contained in:
100
src/lib/libptouch_media_info.c
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100
src/lib/libptouch_media_info.c
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/*
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* libptouch — current tape/media information helper
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*
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* Author: knb
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* Email: knb@artif.org
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*/
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#include "libptouch_internal.h"
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#include "libptouch_layout.h"
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#include <string.h>
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static double tape_width_mm_from_code(uint8_t media_w)
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{
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switch (media_w) {
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case 0x04:
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return 3.5;
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case 0x06:
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return 6.0;
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case 0x09:
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return 9.0;
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case 0x0C:
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return 12.0;
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case 0x12:
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return 18.0;
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case 0x18:
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return 24.0;
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case 0x24:
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return 36.0;
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case 0x15:
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return 21.0; /* FLe width code */
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default:
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return 0.0;
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}
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}
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static double print_dpi_from_profile(const ptouch_printer_profile_t *prof)
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{
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if (!prof)
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return 0.0;
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if (prof->head_width_dots <= 128u)
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return 180.0;
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return 360.0;
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}
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libptouch_err_t libptouch_get_current_media_info(libptouch_ctx *ctx,
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libptouch_media_info_t *out_info)
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{
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if (!ctx || !out_info) {
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if (ctx)
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ptouch_set_error(ctx, LIBPTOUCH_ERR_ARG, "null argument");
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return LIBPTOUCH_ERR_ARG;
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}
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memset(out_info, 0, sizeof(*out_info));
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uint8_t st[LIBPTOUCH_STATUS_LENGTH];
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libptouch_err_t v = libptouch_get_status(ctx, st);
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if (v != LIBPTOUCH_OK)
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return v;
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const ptouch_printer_profile_t *prof =
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ptouch_layout_resolve_profile(ctx->usb_pid, st[4]);
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if (!prof) {
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ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
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"no layout profile for this printer");
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return LIBPTOUCH_ERR_UNSUPPORTED;
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}
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uint16_t left_dots = 0, print_dots = 0, right_dots = 0;
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v = ptouch_layout_from_status(prof, st[11], st[10], &left_dots,
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&print_dots, &right_dots);
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if (v != LIBPTOUCH_OK) {
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ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
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"tape width/layout not supported for this media");
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return LIBPTOUCH_ERR_UNSUPPORTED;
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}
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double tape_mm = tape_width_mm_from_code(st[10]);
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if (tape_mm <= 0.0) {
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ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
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"unknown tape width code");
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return LIBPTOUCH_ERR_UNSUPPORTED;
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}
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out_info->media_width_code = st[10];
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out_info->media_kind_code = st[11];
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out_info->print_dpi = print_dpi_from_profile(prof);
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out_info->feed_dpi = prof->margin_feed_dpi;
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out_info->tape_width_mm = tape_mm;
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out_info->printable_dots = print_dots;
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out_info->left_margin_dots = left_dots;
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out_info->right_margin_dots = right_dots;
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out_info->min_feed_dots = 14u;
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out_info->min_feed_mm =
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((double)out_info->min_feed_dots * 25.4) / prof->margin_feed_dpi;
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ptouch_set_error(ctx, LIBPTOUCH_OK, "");
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return LIBPTOUCH_OK;
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}
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211
src/lib/libptouch_svg.c
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211
src/lib/libptouch_svg.c
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@@ -0,0 +1,211 @@
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/*
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* libptouch — SVG -> 1bit packed raster (librsvg + cairo)
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*
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* Author: knb
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* Email: knb@artif.org
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*/
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#include "libptouch_internal.h"
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#include "libptouch_layout.h"
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#ifdef LIBPTOUCH_HAS_RSVG
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#include <cairo.h>
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#include <librsvg/rsvg.h>
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#endif
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#include <math.h>
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#include <stdint.h>
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#include <stdlib.h>
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libptouch_err_t libptouch_svg_file_to_raster_fit_current_tape(
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libptouch_ctx *ctx, const char *path,
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const libptouch_svg_options_t *options, uint8_t **out_raster,
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size_t *out_raster_bytes, libptouch_raster_params_t *out_params)
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{
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#ifndef LIBPTOUCH_HAS_RSVG
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(void)path;
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(void)options;
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(void)out_raster;
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(void)out_raster_bytes;
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(void)out_params;
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if (ctx) {
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ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
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"SVG support is not built in (missing librsvg-2.0)");
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}
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return LIBPTOUCH_ERR_UNSUPPORTED;
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#else
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if (!ctx || !path || !out_raster || !out_raster_bytes || !out_params) {
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if (ctx)
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ptouch_set_error(ctx, LIBPTOUCH_ERR_ARG, "null argument");
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return LIBPTOUCH_ERR_ARG;
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}
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if (!ctx->usb_open || !ctx->bulk_out_ep) {
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ptouch_set_error(ctx, LIBPTOUCH_ERR_IO,
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"not connected (open USB before SVG conversion)");
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return LIBPTOUCH_ERR_IO;
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}
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uint8_t thr = LIBPTOUCH_PNG_DEFAULT_THRESHOLD;
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if (options)
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thr = options->threshold;
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*out_raster = NULL;
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*out_raster_bytes = 0;
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out_params->width_dots = 0;
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out_params->height_dots = 0;
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out_params->margin_mm = 0;
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uint8_t st[LIBPTOUCH_STATUS_LENGTH];
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libptouch_err_t v = libptouch_get_status(ctx, st);
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if (v != LIBPTOUCH_OK)
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return v;
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const ptouch_printer_profile_t *prof =
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ptouch_layout_resolve_profile(ctx->usb_pid, st[4]);
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if (!prof) {
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ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
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"no layout profile for this printer");
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return LIBPTOUCH_ERR_UNSUPPORTED;
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}
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uint16_t left_dots = 0, print_dots = 0, right_dots = 0;
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v = ptouch_layout_from_status(prof, st[11], st[10], &left_dots,
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&print_dots, &right_dots);
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if (v != LIBPTOUCH_OK) {
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ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
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"tape width/layout not supported for this media");
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return LIBPTOUCH_ERR_UNSUPPORTED;
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}
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(void)left_dots;
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(void)right_dots;
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GError *gerr = NULL;
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RsvgHandle *handle = rsvg_handle_new_from_file(path, &gerr);
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if (!handle) {
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const char *msg = (gerr && gerr->message) ? gerr->message :
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"failed to load SVG";
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ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, msg);
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if (gerr)
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g_error_free(gerr);
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return LIBPTOUCH_ERR_IMAGE;
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}
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double svg_w = 0.0;
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double svg_h = 0.0;
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if (!rsvg_handle_get_intrinsic_size_in_pixels(handle, &svg_w, &svg_h) ||
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svg_w <= 0.0 || svg_h <= 0.0) {
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g_object_unref(handle);
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ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE,
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"invalid SVG dimensions");
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return LIBPTOUCH_ERR_IMAGE;
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}
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/*
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* libptouch_print_raster() transposes the incoming raster before packing
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* lines, so printable tape width maps to the source raster height.
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*/
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double scale = (double)print_dots / svg_h;
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if (scale <= 0.0 || !isfinite(scale)) {
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g_object_unref(handle);
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ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "invalid SVG scale");
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return LIBPTOUCH_ERR_IMAGE;
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}
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uint32_t out_h = (uint32_t)print_dots;
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uint32_t out_w = (uint32_t)ceil(svg_w * scale);
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if (out_h == 0)
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out_h = 1;
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if (out_h > 100000u) {
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g_object_unref(handle);
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ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "scaled SVG too tall");
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return LIBPTOUCH_ERR_IMAGE;
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}
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cairo_surface_t *surface = cairo_image_surface_create(
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CAIRO_FORMAT_ARGB32, (int)out_w, (int)out_h);
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if (cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS) {
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cairo_surface_destroy(surface);
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g_object_unref(handle);
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ptouch_set_error(ctx, LIBPTOUCH_ERR_NOMEM,
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"cairo_image_surface_create failed");
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return LIBPTOUCH_ERR_NOMEM;
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}
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cairo_t *cr = cairo_create(surface);
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if (cairo_status(cr) != CAIRO_STATUS_SUCCESS) {
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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g_object_unref(handle);
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ptouch_set_error(ctx, LIBPTOUCH_ERR_NOMEM, "cairo_create failed");
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return LIBPTOUCH_ERR_NOMEM;
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}
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cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
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cairo_paint(cr);
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RsvgRectangle viewport = { 0.0, 0.0, (double)out_w, (double)out_h };
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GError *render_err = NULL;
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if (!rsvg_handle_render_document(handle, cr, &viewport, &render_err)) {
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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g_object_unref(handle);
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const char *msg = (render_err && render_err->message) ?
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render_err->message :
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"SVG render failed";
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ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, msg);
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if (render_err)
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g_error_free(render_err);
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return LIBPTOUCH_ERR_IMAGE;
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}
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cairo_destroy(cr);
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g_object_unref(handle);
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cairo_surface_flush(surface);
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int stride = cairo_image_surface_get_stride(surface);
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const uint8_t *pix = cairo_image_surface_get_data(surface);
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size_t row_bytes = ((size_t)out_w + 7u) / 8u;
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if (out_h > SIZE_MAX / row_bytes) {
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cairo_surface_destroy(surface);
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ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "raster size overflow");
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return LIBPTOUCH_ERR_IMAGE;
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}
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size_t total = row_bytes * (size_t)out_h;
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uint8_t *out = (uint8_t *)calloc(1, total);
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if (!out) {
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cairo_surface_destroy(surface);
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ptouch_set_error(ctx, LIBPTOUCH_ERR_NOMEM, "calloc raster failed");
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return LIBPTOUCH_ERR_NOMEM;
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}
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for (uint32_t y = 0; y < out_h; y++) {
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const uint32_t *src_row =
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(const uint32_t *)(pix + (size_t)y * (size_t)stride);
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uint8_t *dst_row = out + (size_t)y * row_bytes;
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for (uint32_t x = 0; x < out_w; x++) {
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uint32_t p = src_row[x];
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unsigned a = (p >> 24) & 0xFFu;
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if (a < 128u)
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continue;
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unsigned r = (p >> 16) & 0xFFu;
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unsigned g = (p >> 8) & 0xFFu;
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unsigned b = p & 0xFFu;
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unsigned yv = (77u * r + 150u * g + 29u * b) >> 8;
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if (yv >= (unsigned)thr)
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continue;
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size_t byte = (size_t)x / 8u;
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size_t bit = (size_t)x % 8u;
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dst_row[byte] |= (uint8_t)(1u << (7u - bit));
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}
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}
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cairo_surface_destroy(surface);
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out_params->width_dots = out_w;
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out_params->height_dots = out_h;
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out_params->margin_mm = 0;
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*out_raster = out;
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*out_raster_bytes = total;
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ptouch_set_error(ctx, LIBPTOUCH_OK, "");
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return LIBPTOUCH_OK;
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#endif
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}
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