1 files changed, 53 insertions, 0 deletions
diff --git a/src/texture_buffer.h b/src/texture_buffer.h
new file mode 100644
index 0000000..851833c
--- /dev/null
+++ b/src/texture_buffer.h
@@ -0,0 +1,53 @@
+class TextureBuffer {
+private:
+	GLuint _id;
+	GLuint _texture;
+
+public:
+	struct Guard {
+		const GLuint _id;
+
+		Guard(GLuint id): _id(id) {
+			glBindFramebuffer(GL_FRAMEBUFFER, _id);
+		}
+		~Guard() {
+			glBindFramebuffer(GL_FRAMEBUFFER, 0);
+		}
+	};
+
+	Guard use() {
+		return Guard(_id);
+	}
+
+	TextureBuffer(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 ) {
+			std::cerr << "Texture framebuffer error" << std::endl;
+		}
+	}
+
+	~TextureBuffer() {
+		glDeleteFramebuffers(1, &_id);
+	}
+
+	void resize(std::size_t width, std::size_t height) {
+		auto guard = use();
+
+		glViewport(0, 0, width, height);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, (void*)0);
+	}
+
+	GLuint getTexture() const {
+		return _texture;
+	}
+};