Rename Image class to Label

2023-12-03 11:13:15 +01:00
parent ab9573bee8
commit 13a308ffa5
12 changed files with 60 additions and 30 deletions
--- a/src/graphics/Label.cpp
+++ b/src/graphics/Label.cpp
@@ -0,0 +1,101 @@
+/* 
+    ptrnt - print labels on linux
+    Copyright (C) 2023  Moritz Martinius
+
+    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, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+ */
+
+#include "graphics/Label.hpp"
+
+#include <algorithm>
+#include <spdlog/spdlog.h>
+
+#include <cstddef>
+#include <iostream>  // remove me
+#include <string>
+
+#include "cairo.h"
+#include "pango/pango-context.h"
+#include "pango/pango-font.h"
+#include "pango/pango-fontmap.h"
+#include "pango/pango-layout.h"
+#include "pango/pango-types.h"
+#include "pango/pangocairo.h"
+
+namespace ptprnt::graphics {
+Label::Label() {
+    /*mSurface         = cairo_image_surface_create(CAIRO_FORMAT_A8, 512, 128);
+    cairo_t* cr      = cairo_create(mSurface);
+    mFontDescription = pango_font_description_new();
+    pango_font_description_set_family(mFontDescription, "sans");
+    pango_font_description_set_weight(mFontDescription, PANGO_WEIGHT_SEMIBOLD);
+    pango_font_description_set_size(mFontDescription, 60 * PANGO_SCALE);
+
+    std::string printThis("Mist 💩");
+
+    mLayout = pango_cairo_create_layout(cr);
+    pango_layout_set_font_description(mLayout, mFontDescription);
+    pango_layout_set_text(mLayout, printThis.c_str(), -1);
+
+    cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
+    cairo_move_to(cr, 0.0, 94.0);
+    pango_cairo_show_layout_line(cr, pango_layout_get_line(mLayout, 0));
+
+    cairo_surface_write_to_png(mSurface, "hello.png");*/
+}
+
+uint8_t* Label::getRaw() {
+    cairo_surface_flush(mSurface);
+    return cairo_image_surface_get_data(mSurface);
+}
+
+uint8_t Label::getNumLines(std::string_view strv) {
+    return std::count(strv.begin(), strv.end(), '\n');
+}
+
+void Label::createLabel(const std::string& str) {
+
+    // create Pango layout first, to get the render dimensions
+    auto pangoCtx{pango_font_map_create_context(pango_cairo_font_map_get_default())};
+    auto pangoLyt{pango_layout_new(pangoCtx)};
+    auto pangoFontDesc{pango_font_description_from_string("Noto sans 32")};
+
+    pango_layout_set_single_paragraph_mode(pangoLyt, true);
+    pango_layout_set_height(pangoLyt, getNumLines(str) * -1);
+    pango_layout_set_alignment(pangoLyt, PANGO_ALIGN_CENTER);
+    pango_layout_set_font_description(pangoLyt, pangoFontDesc);
+    pango_context_load_font(pangoCtx, pangoFontDesc);
+    pango_layout_set_text(pangoLyt, str.c_str(), static_cast<int>(str.length()));
+
+    int width = 0, height = 0;
+
+    pango_layout_get_size(pangoLyt, &width, &height);
+
+    SPDLOG_DEBUG("Layout width: {}, height: {}", width / PANGO_SCALE, height / PANGO_SCALE);
+
+    auto surf   = cairo_image_surface_create(CAIRO_FORMAT_A8, width / PANGO_SCALE, 128);
+    cairo_t* cr = cairo_create(surf);
+    pango_cairo_show_layout(cr, pangoLyt);
+
+    cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
+
+    // Debug only
+    cairo_surface_write_to_png(surf, "hellow.png");
+}
+
+Label::~Label() {
+    SPDLOG_DEBUG("Image dtor...");
+}
+}  // namespace ptprnt::graphics