CPU texture

Signed-off-by: Slendi <slendi@socopon.com>

shaders/meson.build

@@ -19,6 +19,8 @@ shader_sources = files(
 	'triangle_mesh.frag',
 	'triangle_mesh.vert',
 	'tex_image.frag',
+	'skybox.frag',
+	'skybox.vert',
 )
 
 spirv_shaders = []

shaders/skybox.frag

@@ -0,0 +1,12 @@
+#version 450
+
+layout (location = 0) in vec3 in_dir;
+
+layout (location = 0) out vec4 out_frag_color;
+
+layout (set = 0, binding = 0) uniform samplerCube environment_map;
+
+void main() {
+	vec3 dir = normalize(in_dir);
+	out_frag_color = vec4(texture(environment_map, dir).rgb, 1.0f);
+}

shaders/skybox.vert

@@ -0,0 +1,14 @@
+#version 450
+
+layout (location = 0) in vec3 in_position;
+layout (location = 0) out vec3 out_dir;
+
+layout(push_constant) uniform constants {
+	mat4 mvp;
+} PushConstants;
+
+void main() {
+	out_dir = in_position;
+	vec4 pos = PushConstants.mvp * vec4(in_position, 1.0f);
+	gl_Position = vec4(pos.xy, pos.w, pos.w);
+}