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https://github.com/godotengine/godot-angle-static.git
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413fd933a3
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>
130 lines
3.4 KiB
C++
130 lines
3.4 KiB
C++
//
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// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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#include "texture_utils.h"
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#include <array>
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GLuint CreateSimpleTexture2D()
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{
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// Use tightly packed data
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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// Generate a texture object
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GLuint texture;
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glGenTextures(1, &texture);
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// Bind the texture object
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glBindTexture(GL_TEXTURE_2D, texture);
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// Load the texture: 2x2 Image, 3 bytes per pixel (R, G, B)
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const size_t width = 2;
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const size_t height = 2;
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GLubyte pixels[width * height * 3] =
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{
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255, 0, 0, // Red
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0, 255, 0, // Green
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0, 0, 255, // Blue
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255, 255, 0, // Yellow
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};
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
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// Set the filtering mode
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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return texture;
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}
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GLuint CreateSimpleTextureCubemap()
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{
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// Generate a texture object
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GLuint texture;
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glGenTextures(1, &texture);
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// Bind the texture object
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glBindTexture(GL_TEXTURE_CUBE_MAP, texture);
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// Load the texture faces
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GLubyte pixels[6][3] =
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{
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// Face 0 - Red
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255, 0, 0,
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// Face 1 - Green,
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0, 255, 0,
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// Face 3 - Blue
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0, 0, 255,
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// Face 4 - Yellow
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255, 255, 0,
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// Face 5 - Purple
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255, 0, 255,
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// Face 6 - White
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255, 255, 255
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};
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for (size_t i = 0; i < 6; i++)
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{
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glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, 1, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, &pixels[i]);
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}
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// Set the filtering mode
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glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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return texture;
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}
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GLuint CreateMipMappedTexture2D()
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{
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// Texture object handle
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const size_t width = 256;
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const size_t height = 256;
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std::array<GLubyte, width * height * 3> pixels;
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const size_t checkerSize = 8;
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for (GLsizei y = 0; y < height; y++)
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{
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for (GLsizei x = 0; x < width; x++)
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{
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GLubyte rColor = 0;
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GLubyte bColor = 0;
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if ((x / checkerSize) % 2 == 0)
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{
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rColor = 255 * ((y / checkerSize) % 2);
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bColor = 255 * (1 - ((y / checkerSize) % 2));
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}
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else
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{
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bColor = 255 * ((y / checkerSize) % 2);
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rColor = 255 * (1 - ((y / checkerSize) % 2));
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}
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pixels[(y * height + x) * 3] = rColor;
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pixels[(y * height + x) * 3 + 1] = 0;
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pixels[(y * height + x) * 3 + 2] = bColor;
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}
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}
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// Generate a texture object
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GLuint texture;
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glGenTextures(1, &texture);
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// Bind the texture object
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glBindTexture(GL_TEXTURE_2D, texture);
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// Load mipmap level 0
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels.data());
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// Generate mipmaps
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glGenerateMipmap(GL_TEXTURE_2D);
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// Set the filtering mode
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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return texture;
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}
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