Attachment 138342 Details for Bug 105731 – C/OpenGL code to trigger the issue

C/OpenGL code to trigger the issue

test.c (text/x-csrc), 3.26 KB, created by Marcel Heinz on 2018-03-24 18:14:23 UTC

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Creator: Marcel Heinz

Created: 2018-03-24 18:14:23 UTC

Size: 3.26 KB

patch

obsolete

>
>/*
> * compile with:
> * gcc test.c -Wall -lglfw -lGLEW
> */
>
>#include <GL/glew.h>
>#include <GLFW/glfw3.h>
>#include <stdio.h>
>
>static const char *shader_header="#version 430\n";
>
>static const char *vs_part1=
>	"out vec4 foo;\n"
>	"void unused() {foo=vec4(1);}\n";
>
>static const char *vs_part2=
>	"in vec4 pos;\n"
>	"void main() { gl_Position = pos; }\n";
>
>static const char *fs_part1=
>	"in vec4 foo;\n"
>	"out vec4 color;\n"
>	"void main() {color=foo;}\n";
>
>void compile_shader(GLuint shader)
>{
>	GLint status=GL_FALSE;
>	GLchar log[16384];
>	GLsizei len=0;
>	glCompileShader(shader);
>	glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
>	if (status != GL_TRUE) {
>		fprintf(stderr, "failed to compile shader %u!\n",shader);
>	} else {
>		printf("shader %u compiled OK\n",shader);
>	}
>	glGetShaderInfoLog(shader, sizeof(log), &len, log);
>	if (len > 0) {
>		printf("shader %u info log:\n%s\n",shader, log);
>	}
>}
>
>void link_program(GLuint program)
>{
>	GLint status=GL_FALSE;
>	GLchar log[16384];
>	GLsizei len=0;
>	glLinkProgram(program);
>	glGetProgramiv(program, GL_LINK_STATUS, &status);
>	if (status != GL_TRUE) {
>		fprintf(stderr, "failed to link program %u!\n",program);
>	} else {
>		printf("program %u linked OK\n",program);
>	}
>	glGetProgramInfoLog(program, sizeof(log), &len, log);
>	if (len > 0) {
>		printf("shader %u info log:\n%s\n",program, log);
>	}
>}
>
>static void test_single() {
>	GLuint s1,s2,p;
>	const GLchar *vs[]={shader_header, vs_part1, vs_part2};
>	const GLchar *fs[]={shader_header, fs_part1};
>
>	s1=glCreateShader(GL_VERTEX_SHADER);
>	glShaderSource(s1, sizeof(vs)/sizeof(vs[0]), vs, NULL);
>	compile_shader(s1);
>
>	s2=glCreateShader(GL_FRAGMENT_SHADER);
>	glShaderSource(s2, sizeof(fs)/sizeof(fs[0]), fs, NULL);
>	compile_shader(s2);
>
>	p=glCreateProgram();
>	glAttachShader(p, s1);
>	glAttachShader(p, s2);
>	link_program(p);
>
>	glDeleteShader(s1);
>	glDeleteShader(s2);
>	glDeleteProgram(p);
>}
>
>static void test_separated() {
>	GLuint s1,s2,s3,p;
>	const GLchar *vs1[]={shader_header, vs_part1};
>	const GLchar *vs2[]={shader_header, vs_part2};
>	const GLchar *fs[]={shader_header, fs_part1};
>
>	s1=glCreateShader(GL_VERTEX_SHADER);
>	glShaderSource(s1, sizeof(vs1)/sizeof(vs1[0]), vs1, NULL);
>	compile_shader(s1);
>
>	s2=glCreateShader(GL_VERTEX_SHADER);
>	glShaderSource(s2, sizeof(vs2)/sizeof(vs2[0]), vs2, NULL);
>	compile_shader(s2);
>
>	s3=glCreateShader(GL_FRAGMENT_SHADER);
>	glShaderSource(s3, sizeof(fs)/sizeof(fs[0]), fs, NULL);
>	compile_shader(s3);
>
>	p=glCreateProgram();
>	glAttachShader(p, s1);
>	glAttachShader(p, s2);
>	glAttachShader(p, s3);
>	link_program(p);
>
>	glDeleteShader(s1);
>	glDeleteShader(s2);
>	glDeleteShader(s3);
>	glDeleteProgram(p);
>}
>
>int main (int argc, char **argv)
>{
>	GLFWwindow *win;
>
>	if (!glfwInit()) 
>		return 1;
>	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
>	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
>	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
>	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
>	if ( !(win=glfwCreateWindow( 800, 600, "test", NULL, NULL)) ) {
>		fprintf(stderr, "failed to get window with GL 4.3 core context!\n");
>		glfwTerminate();
>		return 2;
>	}
>	glfwMakeContextCurrent(win);
>	glewExperimental=GL_TRUE;
>	if (glewInit() != GLEW_OK) {
>		fprintf(stderr, "failed to initialize GLEW!\n");
>		glfwTerminate();
>		return 2;
>	}
>
>	test_single();
>	test_separated();
>
>	glfwTerminate();
>	return 0;
>}
>

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