move all vlib modules to vlib/

vlib/stbi/stbi.v

@@ -0,0 +1,68 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+module stbi
+
+import gl
+
+#flag linux  -I @VROOT/thirdparty/stb_image
+#flag darwin -I @VROOT/thirdparty/stb_image
+
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"
+struct Image {
+mut:
+	width       int
+	height      int
+	nr_channels int
+	ok          bool
+	data        voidptr
+	ext         string
+}
+
+import const (
+	GL_RGBA
+	GL_RGB
+	GL_UNSIGNED_BYTE
+	GL_TEXTURE_2D
+	STBI_rgb_alpha
+)
+
+pub fn load(path string) Image {
+	ext := path.all_after('.')
+	mut res := Image {
+		ok: true
+		ext: ext
+		data: 0
+	}
+	if ext == 'png' {
+		res.data = C.stbi_load(path.str, &res.width, &res.height, &res.nr_channels, STBI_rgb_alpha)
+	}
+	else {
+		res.data = C.stbi_load(path.str, &res.width, &res.height, &res.nr_channels, 0)
+	}
+	if isnil(res.data) {
+		println('stbi cant load')
+		exit(1)
+	}
+	return res
+}
+
+pub fn (img Image) free() {
+	C.stbi_image_free(img.data)
+}
+
+pub fn (img Image) tex_image_2d() {
+	mut rgb_flag := GL_RGB
+	if img.ext == 'png' {
+		rgb_flag = GL_RGBA
+	}
+	C.glTexImage2D(GL_TEXTURE_2D, 0, rgb_flag, img.width, img.height, 0, rgb_flag, GL_UNSIGNED_BYTE,
+	img.data)
+}
+
+pub fn set_flip_vertically_on_load(val bool) {
+	C.stbi_set_flip_vertically_on_load(val)
+}
+