textures + mesh loader (works, but looks bad)

Makefile

@@ -1,12 +1,12 @@
 CC := g++
 LD := g++
 
-CC_FLAGS := -std=c++2a -MMD -MP -g
+CC_FLAGS := -std=c++2a -MMD -MP -Ofast
 CC_INCLUDES := -I./include
 CC_DEFINES :=
 
 LD_FLAGS :=
-LD_LIBS := -lEGL -lX11 -lGLEW -lGL
+LD_LIBS := -lEGL -lX11 -lGLEW -lGL -lsoil2
 
 SRC_DIR := src src/graphic src/math
 OBJ_DIR := obj

include/graphic/shader.h

@@ -11,7 +11,8 @@ namespace dk
 enum class shader_type
 {
 	VERTEX_SHADER = 0,
-	FRAGMENT_SHADER
+	FRAGMENT_SHADER,
+	GEOMETRY_SHADER
 };
 
 class shader

include/graphic/texture.h

@@ -0,0 +1,50 @@
+#ifndef __DK_TEXTURE_H__
+#define __DK_TEXTURE_H__
+
+#include <SOIL2.h>
+#include "log.h"
+#include "status.h"
+#include "graphic/gl.h"
+#include "containers/string_view.h"
+
+namespace dk
+{
+
+class texture
+{
+private:
+	int32_t  m_height;
+	int32_t  m_width;
+	uint8_t* m_data;
+	GLuint   m_tex;
+
+public:
+	void enable() const { GL_CALL(glBindTexture(GL_TEXTURE_2D, m_tex)); }
+	void disable() const { GL_CALL(glBindTexture(GL_TEXTURE_2D, 0)); }
+
+	status create(std::string_view file_path)
+	{
+		auto beg = std::chrono::high_resolution_clock::now();
+		m_data = SOIL_load_image(file_path.data(), &m_width, &m_height, nullptr, SOIL_LOAD_RGB);
+		if (m_data == nullptr) {
+			DK_LOG_ERROR("Failed to load texture from file '", file_path, "': ", SOIL_last_result());
+			return status::ERROR;
+		}
+
+		GL_CALL(glGenTextures(1, &m_tex));
+		this->enable();
+		GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, m_width, m_height, 0, GL_RGB, GL_UNSIGNED_BYTE, m_data));
+		GL_CALL(glGenerateMipmap(GL_TEXTURE_2D));
+		this->disable();
+
+		SOIL_free_image_data(m_data);
+		auto end = std::chrono::high_resolution_clock::now();
+		auto dur = std::chrono::duration_cast<std::chrono::microseconds>(end - beg);
+		DK_LOG_OK("Texture '", file_path, "' loaded (", dur.count() / 1000.0f, " ms): ", m_width, "x", m_height);
+		return status::OK;
+	}
+};
+
+}
+
+#endif  //  !__DK_TEXTURE_H__

include/tmp.h

@@ -0,0 +1,28 @@
+#include "containers/string_view.h"
+
+dk::string_view vert_src{ R"glsl(
+	#version 330 core
+	layout(location = 0) in vec3 vertexPosition_modelspace;
+	layout(location = 1) in vec3 norm;
+	layout(location = 2) in vec3 in_tex_coord;
+	uniform mat4 mat;
+	varying vec3 my_norm;
+	varying vec2 tex_coord;
+	void main(){
+		my_norm = norm;
+		tex_coord = in_tex_coord.xy;
+		gl_Position = vec4(vertexPosition_modelspace, 1) * mat;
+	}
+)glsl" };
+
+dk::string_view frag_src{ R"glsl(
+	#version 330 core
+	uniform sampler2D tex;
+	out vec3 color;
+	varying vec3 my_norm;
+	varying vec2 tex_coord;
+	void main(){
+		//color = vec3(gl_FragCoord.z);
+		color = texture(tex, vec2(tex_coord.x, 1.0 - tex_coord.y)).rgb;
+	}
+)glsl" };

res/cube.obj

@@ -14,16 +14,19 @@ vn 1.0000 -0.0000 0.0000
 vn 0.0000 -0.0000 1.0000
 vn -1.0000 -0.0000 -0.0000
 vn 0.0000 0.0000 -1.0000
-vt 0 0 0
-f 2/1/1 4/1/1 1/1/1
-f 8/1/2 6/1/2 5/1/2
-f 5/1/3 2/1/3 1/1/3
-f 6/1/4 3/1/4 2/1/4
-f 3/1/5 8/1/5 4/1/5
-f 1/1/6 8/1/6 5/1/6
-f 2/1/1 3/1/1 4/1/1
-f 8/1/2 7/1/2 6/1/2
-f 5/1/3 6/1/3 2/1/3
-f 6/1/4 7/1/4 3/1/4
-f 3/1/5 7/1/5 8/1/5
-f 1/1/6 4/1/6 8/1/6
+vt 0 0
+vt 1 0
+vt 0 1
+vt 1 1
+f 2/1/1 4/2/1 1/3/1
+f 8/1/2 6/2/2 5/3/2
+f 5/1/3 2/2/3 1/3/3
+f 6/1/4 3/2/4 2/3/4
+f 3/1/5 8/2/5 4/3/5
+f 1/1/6 8/2/6 5/3/6
+f 2/1/1 3/2/1 4/3/1
+f 8/1/2 7/2/2 6/3/2
+f 5/1/3 6/2/3 2/3/3
+f 6/1/4 7/2/4 3/3/4
+f 3/1/5 7/2/5 8/3/5
+f 1/1/6 4/2/6 8/3/6