3 files changed, 163 insertions, 0 deletions
diff --git a/src/buffer/frame/texture_framebuffer.h b/src/buffer/frame/texture_framebuffer.h
new file mode 100644
index 0000000..31153ff
--- /dev/null
+++ b/src/buffer/frame/texture_framebuffer.h
@@ -0,0 +1,62 @@
+#pragma once
+
+class TextureFramebuffer {
+private:
+	GLuint _id;
+	GLuint _texture;
+
+	bool _good = false;
+
+public:
+	struct Guard {
+		const GLuint _id;
+
+		Guard(GLuint id): _id(id) {
+			glBindFramebuffer(GL_FRAMEBUFFER, _id);
+		}
+		~Guard() {
+			glBindFramebuffer(GL_FRAMEBUFFER, 0);
+		}
+	};
+
+	Guard use() const {
+		return Guard(_id);
+	}
+
+	TextureFramebuffer(std::size_t width, std::size_t height) {
+		glGenFramebuffers(1, &_id);
+
+		auto guard = use();
+
+		glGenTextures(1, &_texture);
+		glBindTexture(GL_TEXTURE_2D, _texture);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, (void*)0);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, _texture, 0);
+
+		if ( glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE ) {
+			_good = true;
+		}
+	}
+
+	~TextureFramebuffer() {
+		glDeleteFramebuffers(1, &_id);
+	}
+
+	bool isGood() const {
+		return _good;
+	}
+
+	void resize(std::size_t width, std::size_t height) const {
+		auto guard = use();
+
+		glViewport(0, 0, width, height);
+		glBindTexture(GL_TEXTURE_2D, _texture);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, (void*)0);
+	}
+
+	GLuint getTexture() const {
+		return _texture;
+	}
+};
diff --git a/src/buffer/vertex/particle_vertex_buffer.h b/src/buffer/vertex/particle_vertex_buffer.h
new file mode 100644
index 0000000..25855a2
--- /dev/null
+++ b/src/buffer/vertex/particle_vertex_buffer.h
@@ -0,0 +1,44 @@
+#pragma once
+
+#include <vector>
+
+class ParticleVertexBuffer {
+private:
+	std::vector<GLfloat> _data;
+
+	GLuint _array;
+	GLuint _buffer;
+
+public:
+	ParticleVertexBuffer(std::vector<GLfloat>&& data):
+		_data{ std::move(data) } {
+		glGenVertexArrays(1, &_array);
+		glGenBuffers(1, &_buffer);
+
+		glBindVertexArray(_array);
+		glBindBuffer(GL_ARRAY_BUFFER, _buffer);
+		glBufferData(
+			GL_ARRAY_BUFFER,
+			_data.size() * sizeof(GLfloat),
+			_data.data(),
+			GL_STATIC_DRAW
+		);
+
+		glEnableVertexAttribArray(0);
+		glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
+	}
+
+	~ParticleVertexBuffer() {
+		glDeleteBuffers(1, &_buffer);
+		glDeleteVertexArrays(1, &_array);
+	}
+
+	void draw() const {
+		glBindVertexArray(_array);
+		glDrawArrays(GL_POINTS, 0, 3*_data.size());
+	}
+
+	GLuint getBuffer() const {
+		return _buffer;
+	}
+};
diff --git a/src/buffer/vertex/texture_display_vertex_buffer.h b/src/buffer/vertex/texture_display_vertex_buffer.h
new file mode 100644
index 0000000..6d4eec2
--- /dev/null
+++ b/src/buffer/vertex/texture_display_vertex_buffer.h
@@ -0,0 +1,57 @@
+#pragma once
+
+#include <vector>
+
+class TextureDisplayVertexBuffer {
+private:
+	const std::vector<GLfloat> _data;
+
+	GLuint _array;
+	GLuint _buffer;
+
+public:
+	TextureDisplayVertexBuffer():
+		_data{
+			-1.f,  1.f, 0.f, 1.f,
+			-1.f, -1.f, 0.f, 0.f,
+			 1.f, -1.f, 1.f, 0.f,
+
+			-1.f,  1.f, 0.f, 1.f,
+			 1.f, -1.f, 1.f, 0.f,
+			 1.f,  1.f, 1.f, 1.f
+		} {
+		glGenVertexArrays(1, &_array);
+		glGenBuffers(1, &_buffer);
+
+		glBindVertexArray(_array);
+		glBindBuffer(GL_ARRAY_BUFFER, _buffer);
+		glBufferData(
+			GL_ARRAY_BUFFER,
+			_data.size() * sizeof(GLfloat),
+			_data.data(),
+			GL_STATIC_DRAW
+		);
+
+		glEnableVertexAttribArray(0);
+		glVertexAttribPointer(
+			0, 2, GL_FLOAT, GL_FALSE, 4*sizeof(GLfloat), (void*)0);
+		glEnableVertexAttribArray(1);
+		glVertexAttribPointer(
+			1, 2, GL_FLOAT, GL_FALSE, 4*sizeof(GLfloat), (void*)(2*sizeof(GLfloat)));
+	}
+
+	~TextureDisplayVertexBuffer() {
+		glDeleteBuffers(1, &_buffer);
+		glDeleteVertexArrays(1, &_array);
+	}
+
+	void draw(const std::vector<GLuint>& textures) const {
+		glBindVertexArray(_array);
+		glBindTextures(textures[0], textures.size(), textures.data());
+		glDrawArrays(GL_TRIANGLES, 0, 6);
+	}
+
+	GLuint getBuffer() const {
+		return _buffer;
+	}
+};