feat Add text rendering for bitmap text

2 files changed, 103 insertions, 0 deletions

diff --git a/src/blu_cat/gra/text.cpp b/src/blu_cat/gra/text.cpp
new file mode 100644
index 0000000..4f8a31a
--- /dev/null
+++ b/src/blu_cat/gra/text.cpp
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2022-2025 Frederico de Oliveira Linhares
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "text.hpp"
+
+#include "../int/core.hpp"
+
+namespace BluCat::GRA
+{
+
+Text::Text(
+	const BitmapFont &font, const char *str, const I32F x, const I32F y):
+	x{x},
+	y{y},
+	height{font.height},
+	z_index{4.5f}
+{
+	const std::vector<UI32> text{BluCat::GRA::Character::str_to_unicode(str)};
+	this->width = text.size() * font.width;
+
+  for(I32F index{0}; index < text.size(); index++)
+	{
+		if(str[index] == 32) continue;
+
+		glm::vec4 rect{
+			x + index * font.width,
+			y,
+			x + (index + 1) * font.width,
+			y + font.height};
+
+		this->letters.emplace_back(font.characters.at(text[index]).sprite, rect);
+	}
+}
+
+void
+Text::draw()
+{
+	auto &sprites_to_draw = BluCat::INT::core.vk_renderer->sprites_to_draw[
+		BluCat::INT::core.vk_swapchain->current_frame];
+
+	for(Letter &l: this->letters)
+		sprites_to_draw.emplace_back(l.sprite, l.position, this->z_index);
+}
+
+}
diff --git a/src/blu_cat/gra/text.hpp b/src/blu_cat/gra/text.hpp
new file mode 100644
index 0000000..dc085e9
--- /dev/null
+++ b/src/blu_cat/gra/text.hpp
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2022-2025 Frederico de Oliveira Linhares
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef BLU_CAT_GRA_TEXT_H
+#define BLU_CAT_GRA_TEXT_H 1
+
+#include "bitmap_font.hpp"
+
+namespace BluCat::GRA
+{
+
+struct Letter
+{
+	std::shared_ptr<Sprite> sprite;
+	glm::vec4 position;
+};
+
+struct Text
+{
+	std::vector<Letter> letters;
+	I32F x, y, width, height;
+	F32 z_index;
+
+	Text(const BitmapFont &font, const char *str, const I32F x, const I32F y);
+
+	void
+	draw();
+};
+
+}
+
+#endif /* BLU_CAT_GRA_TEXT_H */