Move all GLES samples into the samples directory.

There was no real reason to keep them in an angle directory and it makes
the generated projects nicer.

BUG=angleproject:981

Change-Id: I844e44dc5c2df51f5292cff4bdffe5e951745aae
Reviewed-on: https://chromium-review.googlesource.com/266871
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>

samples/sample_util/texture_utils.cpp

@@ -0,0 +1,129 @@
+//
+// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "texture_utils.h"
+#include <array>
+
+GLuint CreateSimpleTexture2D()
+{
+    // Use tightly packed data
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+    // Generate a texture object
+    GLuint texture;
+    glGenTextures(1, &texture);
+
+    // Bind the texture object
+    glBindTexture(GL_TEXTURE_2D, texture);
+
+    // Load the texture: 2x2 Image, 3 bytes per pixel (R, G, B)
+    const size_t width = 2;
+    const size_t height = 2;
+    GLubyte pixels[width * height * 3] =
+    {
+        255,   0,   0, // Red
+          0, 255,   0, // Green
+          0,   0, 255, // Blue
+        255, 255,   0, // Yellow
+    };
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
+
+    // Set the filtering mode
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+    return texture;
+}
+
+GLuint CreateSimpleTextureCubemap()
+{
+    // Generate a texture object
+    GLuint texture;
+    glGenTextures(1, &texture);
+
+    // Bind the texture object
+    glBindTexture(GL_TEXTURE_CUBE_MAP, texture);
+
+    // Load the texture faces
+    GLubyte pixels[6][3] =
+    {
+        // Face 0 - Red
+        255, 0, 0,
+        // Face 1 - Green,
+        0, 255, 0,
+        // Face 3 - Blue
+        0, 0, 255,
+        // Face 4 - Yellow
+        255, 255, 0,
+        // Face 5 - Purple
+        255, 0, 255,
+        // Face 6 - White
+        255, 255, 255
+    };
+
+    for (size_t i = 0; i < 6; i++)
+    {
+        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, 1, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, &pixels[i]);
+    }
+
+    // Set the filtering mode
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+    return texture;
+}
+
+GLuint CreateMipMappedTexture2D()
+{
+    // Texture object handle
+    const size_t width = 256;
+    const size_t height = 256;
+    std::array<GLubyte, width * height * 3> pixels;
+
+    const size_t checkerSize = 8;
+    for (GLsizei y = 0; y < height; y++)
+    {
+        for (GLsizei x = 0; x < width; x++)
+        {
+            GLubyte rColor = 0;
+            GLubyte bColor = 0;
+
+            if ((x / checkerSize) % 2 == 0)
+            {
+                rColor = 255 * ((y / checkerSize) % 2);
+                bColor = 255 * (1 - ((y / checkerSize) % 2));
+            }
+            else
+            {
+                bColor = 255 * ((y / checkerSize) % 2);
+                rColor = 255 * (1 - ((y / checkerSize) % 2));
+            }
+
+            pixels[(y * height + x) * 3] = rColor;
+            pixels[(y * height + x) * 3 + 1] = 0;
+            pixels[(y * height + x) * 3 + 2] = bColor;
+        }
+    }
+
+    // Generate a texture object
+    GLuint texture;
+    glGenTextures(1, &texture);
+
+    // Bind the texture object
+    glBindTexture(GL_TEXTURE_2D, texture);
+
+    // Load mipmap level 0
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels.data());
+
+    // Generate mipmaps
+    glGenerateMipmap(GL_TEXTURE_2D);
+
+    // Set the filtering mode
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    return texture;
+}