| /* |
| * Copyright © 2012 Google, Inc. |
| * |
| * This is part of HarfBuzz, a text shaping library. |
| * |
| * Permission is hereby granted, without written agreement and without |
| * license or royalty fees, to use, copy, modify, and distribute this |
| * software and its documentation for any purpose, provided that the |
| * above copyright notice and the following two paragraphs appear in |
| * all copies of this software. |
| * |
| * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| * |
| * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| * |
| * Google Author(s): Behdad Esfahbod |
| */ |
| |
| #ifndef HELPER_CAIRO_ANSI_HH |
| #define HELPER_CAIRO_ANSI_HH |
| |
| #include "hb.hh" |
| |
| #include <cairo.h> |
| |
| #include "ansi-print.hh" |
| |
| #ifdef HAVE_CHAFA |
| # include <chafa.h> |
| |
| /* Similar to ansi-print.cc */ |
| # define CELL_W 8 |
| # define CELL_H (2 * CELL_W) |
| |
| static void |
| chafa_print_image_rgb24 (const void *data, int width, int height, int stride) |
| { |
| ChafaTermInfo *term_info; |
| ChafaSymbolMap *symbol_map; |
| ChafaCanvasConfig *config; |
| ChafaCanvas *canvas; |
| GString *gs; |
| unsigned int cols = (width + CELL_W - 1) / CELL_W; |
| unsigned int rows = (height + CELL_H - 1) / CELL_H; |
| gchar **environ; |
| ChafaCanvasMode mode; |
| ChafaPixelMode pixel_mode; |
| |
| /* Adapt to terminal; use sixels if available, and fall back to symbols |
| * with as many colors as are supported */ |
| |
| environ = g_get_environ (); |
| term_info = chafa_term_db_detect (chafa_term_db_get_default (), |
| environ); |
| |
| pixel_mode = CHAFA_PIXEL_MODE_SYMBOLS; |
| |
| if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_BEGIN_SIXELS)) |
| { |
| pixel_mode = CHAFA_PIXEL_MODE_SIXELS; |
| mode = CHAFA_CANVAS_MODE_TRUECOLOR; |
| } |
| // else if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_SET_COLOR_FGBG_DIRECT)) |
| // mode = CHAFA_CANVAS_MODE_TRUECOLOR; |
| else if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_SET_COLOR_FGBG_256)) |
| mode = CHAFA_CANVAS_MODE_INDEXED_240; |
| else if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_SET_COLOR_FGBG_16)) |
| mode = CHAFA_CANVAS_MODE_INDEXED_16; |
| else if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_INVERT_COLORS)) |
| mode = CHAFA_CANVAS_MODE_FGBG_BGFG; |
| else |
| mode = CHAFA_CANVAS_MODE_FGBG; |
| |
| /* Create the configuration */ |
| |
| symbol_map = chafa_symbol_map_new (); |
| chafa_symbol_map_add_by_tags (symbol_map, |
| (ChafaSymbolTags) (CHAFA_SYMBOL_TAG_BLOCK |
| | CHAFA_SYMBOL_TAG_SPACE)); |
| |
| config = chafa_canvas_config_new (); |
| chafa_canvas_config_set_canvas_mode (config, mode); |
| chafa_canvas_config_set_pixel_mode (config, pixel_mode); |
| chafa_canvas_config_set_cell_geometry (config, 10, 20); |
| chafa_canvas_config_set_geometry (config, cols, rows); |
| chafa_canvas_config_set_symbol_map (config, symbol_map); |
| chafa_canvas_config_set_color_extractor (config, CHAFA_COLOR_EXTRACTOR_MEDIAN); |
| chafa_canvas_config_set_work_factor (config, 1.0f); |
| |
| /* Create canvas, draw to it and render output string */ |
| |
| canvas = chafa_canvas_new (config); |
| chafa_canvas_draw_all_pixels (canvas, |
| /* Cairo byte order is host native */ |
| G_BYTE_ORDER == G_LITTLE_ENDIAN |
| ? CHAFA_PIXEL_BGRA8_PREMULTIPLIED |
| : CHAFA_PIXEL_ARGB8_PREMULTIPLIED, |
| (const guint8 *) data, |
| width, |
| height, |
| stride); |
| gs = chafa_canvas_print (canvas, term_info); |
| |
| /* Print the string */ |
| |
| fwrite (gs->str, sizeof (char), gs->len, stdout); |
| |
| if (pixel_mode != CHAFA_PIXEL_MODE_SIXELS) |
| fputc ('\n', stdout); |
| |
| /* Free resources */ |
| |
| g_string_free (gs, TRUE); |
| chafa_canvas_unref (canvas); |
| chafa_canvas_config_unref (config); |
| chafa_symbol_map_unref (symbol_map); |
| chafa_term_info_unref (term_info); |
| g_strfreev (environ); |
| } |
| |
| #endif /* HAVE_CHAFA */ |
| |
| static inline cairo_status_t |
| helper_cairo_surface_write_to_ansi_stream (cairo_surface_t *surface, |
| cairo_write_func_t write_func, |
| void *closure) |
| { |
| unsigned int width = cairo_image_surface_get_width (surface); |
| unsigned int height = cairo_image_surface_get_height (surface); |
| if (cairo_image_surface_get_format (surface) != CAIRO_FORMAT_RGB24) { |
| cairo_surface_t *new_surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height); |
| cairo_t *cr = cairo_create (new_surface); |
| if (cairo_image_surface_get_format (surface) == CAIRO_FORMAT_A8) { |
| cairo_set_source_rgb (cr, 0., 0., 0.); |
| cairo_paint (cr); |
| cairo_set_source_rgb (cr, 1., 1., 1.); |
| cairo_mask_surface (cr, surface, 0, 0); |
| } else { |
| cairo_set_source_rgb (cr, 1., 1., 1.); |
| cairo_paint (cr); |
| cairo_set_source_surface (cr, surface, 0, 0); |
| cairo_paint (cr); |
| } |
| cairo_destroy (cr); |
| surface = new_surface; |
| } else |
| cairo_surface_reference (surface); |
| |
| unsigned int stride = cairo_image_surface_get_stride (surface); |
| const uint32_t *data = (uint32_t *) (void *) cairo_image_surface_get_data (surface); |
| |
| /* We don't have rows to spare on the terminal window... |
| * Find the tight image top/bottom and only print in between. */ |
| |
| /* Use corner color as background color. */ |
| uint32_t bg_color = data ? * (uint32_t *) data : 0; |
| |
| /* Drop first row while empty */ |
| while (height) |
| { |
| unsigned int i; |
| for (i = 0; i < width; i++) |
| if (data[i] != bg_color) |
| break; |
| if (i < width) |
| break; |
| data += stride / 4; |
| height--; |
| } |
| |
| /* Drop last row while empty */ |
| unsigned int orig_height = height; |
| while (height) |
| { |
| const uint32_t *row = data + (height - 1) * stride / 4; |
| unsigned int i; |
| for (i = 0; i < width; i++) |
| if (row[i] != bg_color) |
| break; |
| if (i < width) |
| break; |
| height--; |
| } |
| if (height < orig_height) |
| height++; /* Add one last blank row for padding. */ |
| |
| if (width && height) |
| { |
| #ifdef HAVE_CHAFA |
| if (true) |
| chafa_print_image_rgb24 (data, width, height, stride); |
| else |
| #endif |
| ansi_print_image_rgb24 (data, width, height, stride / 4); |
| } |
| |
| cairo_surface_destroy (surface); |
| return CAIRO_STATUS_SUCCESS; |
| } |
| |
| |
| #endif |