From 617fec827652d216e2d1e5015f816c4400655d73 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Mon, 21 May 2018 21:16:56 +0200
Subject: Abstract texture display buffer, shader

---
 src/texture_display_buffer.h | 59 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 src/texture_display_buffer.h

(limited to 'src/texture_display_buffer.h')

diff --git a/src/texture_display_buffer.h b/src/texture_display_buffer.h
new file mode 100644
index 0000000..530b99d
--- /dev/null
+++ b/src/texture_display_buffer.h
@@ -0,0 +1,59 @@
+#pragma once
+
+#include <vector>
+
+class TextureDisplayBuffer {
+private:
+	const std::vector<GLfloat> _data;
+
+	GLuint _texture;
+	GLuint _array;
+	GLuint _buffer;
+
+public:
+	TextureDisplayBuffer(GLuint texture):
+		_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
+		},
+		_texture(texture) {
+		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)));
+	}
+
+	~TextureDisplayBuffer() {
+		glDeleteBuffers(1, &_buffer);
+		glDeleteVertexArrays(1, &_array);
+	}
+
+	void draw() const {
+		glBindVertexArray(_array);
+		glBindTexture(GL_TEXTURE_2D, _texture);
+		glDrawArrays(GL_TRIANGLES, 0, 6);
+	}
+
+	GLuint getBuffer() const {
+		return _buffer;
+	}
+};
-- 
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