These look like browser bugs where internal WebGL->native GLSL shader
translation introduces some warnings. Try creating a native WebGL test case
and submit it to browser bug trackers, that should give some visibility to
the issue. (or perhaps these issues might already have been reported to
browsers, though can't recall having seen this exact message in a bug
report)
2017-03-20 21:17 GMT+02:00 bobajeff <bobajef...@gmail.com>:
> I have a very simple GLES example that keeps giving me a warning about
> some unsupported shader extension in my shader info logs. As far as I can
> tell I'm not even using it.
>
> The warnings look like:
>
> 0:2(12): warning: extension `GL_ARB_gpu_shader5' unsupported in vertex
>> shader
>>
>> 0:2(12): warning: extension `GL_ARB_gpu_shader5' unsupported in fragment
>> shader
>>
>
> Here's the code:
> #include <GLES2/gl2.h>
> #define GLFW_INCLUDE_NONE
> #include <GLFW/glfw3.h>
> #ifdef __EMSCRIPTEN__
> #include <emscripten.h>
> #endif
>
> #define __ALLWAYS_SHOW_SHADER_DEBUG_LOG__
> #include "debug_gl.h"
>
>
> GLFWwindow* window;
>
> void main_loop();
>
>
> int main()
> {
> glfwInit();
> window = glfwCreateWindow(800, 600, "OpenGL ES", nullptr, nullptr);
> // Windowed
> glfwMakeContextCurrent(window);
>
> // Shader sources
> const GLchar* vertexSource =
> "#version 100\n"
> "attribute vec2 position;"
> "void main()"
> "{"
> " gl_Position = vec4(position, 0.0, 1.0);"
> "}";
> const GLchar* fragmentSource =
> "#version 100\n"
> "void main()"
> "{"
> " gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);"
> "}";
>
> //Shader compile
> GLuint vertexShader = glCreateShader(GL_VERTEX_SHADER);
> glShaderSource(vertexShader, 1, &vertexSource, NULL);
> glCompileShader(vertexShader);
> GLuint fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
> glShaderSource(fragmentShader, 1, &fragmentSource, NULL);
> glCompileShader(fragmentShader);
>
> __CHECK_VSHADER(vertexShader)
> __CHECK_FSHADER(fragmentShader)
>
> //Shader link
> GLuint shaderProgram = glCreateProgram();
> glAttachShader(shaderProgram, vertexShader);
> glAttachShader(shaderProgram, fragmentShader);
> glLinkProgram(shaderProgram);
> glUseProgram(shaderProgram);
>
> __CHECK_SHADER_PROG(shaderProgram)
>
> //vertice data
> float vertices[] = {
> 0.0f, 0.5f, // Vertex 1 (X, Y)
> 0.5f, -0.5f, // Vertex 2 (X, Y)
> -0.5f, -0.5f // Vertex 3 (X, Y)
> };
>
> //initialize buffers
> GLuint vbo;
> glGenBuffers(1, &vbo);
>
> //send data to buffers
> glBindBuffer(GL_ARRAY_BUFFER, vbo);
> glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices,
> GL_STATIC_DRAW);
>
> //Format of vertice data?
> GLint posAttrib = glGetAttribLocation(shaderProgram, "position");
> glEnableVertexAttribArray(posAttrib);
> glVertexAttribPointer(posAttrib, 2, GL_FLOAT, GL_FALSE, 0, 0);
> __CHECK_GL_ERROR__
>
> #ifdef __EMSCRIPTEN__
> emscripten_set_main_loop(main_loop, 0, 1);
> #else
> while(!glfwWindowShouldClose(window))
> {
> main_loop();
> }
> #endif
>
> glfwTerminate();
> return 0;
> }
>
> void main_loop()
> {
> glDrawArrays(GL_TRIANGLES, 0, 3);
>
> glfwSwapBuffers(window);
> glfwPollEvents();
> if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
> glfwSetWindowShouldClose(window, GL_TRUE);
> }
>
>
>
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