6 files changed, 138 insertions, 0 deletions

diff --git a/fiz/naloga/gl/.gitignore b/fiz/naloga/gl/.gitignore
new file mode 100644
index 0000000..4da39b2
--- /dev/null
+++ b/fiz/naloga/gl/.gitignore
@@ -0,0 +1,2 @@
+test
+helmholtz
diff --git a/fiz/naloga/gl/Makefile b/fiz/naloga/gl/Makefile
new file mode 100644
index 0000000..7d04b8b
--- /dev/null
+++ b/fiz/naloga/gl/Makefile
@@ -0,0 +1,40 @@
+DESTDIR=/
+CC = cc
+cflags = -O0 -Wall -I. -fpic -Wformat-security -Wextra -pedantic -g3 $(shell pkg-config --cflags libstrophe)
+ldflags = $(shell pkg-config --libs glew) -lglfw
+PROJ = helmholtz
+# cflags and ldflags are used so that users specifying CFLAGS and LDFLAGS do not override my flags
+# += is not used, because gcc usually accepts last option, for example -O0 -O2 will use -O2
+.NOTPARALLEL:
+$(PROJ): vertex_shader.o fragment_shader.o $(PROJ).c
+	# $(CC) -c -DIX_LIB $(cflags) $(CFLAGS) $(PROJ).c
+	# $(CC) -shared -olib$(PROJ).so $(PROJ).o
+	# $(CC) -L. $(cflags) $(CFLAGS) $(PROJ).c -l$(PROJ) $(ldflags) -o$(PROJ)
+	$(CC) $(cflags) $(CFLAGS) $(PROJ).c $(ldflags) -o$(PROJ) *_shader.o
+
+%_shader.o: %.glsl
+	ld -r -b binary -o $@ $<
+
+install:
+	mkdir -p $(DESTDIR)/usr/bin # $(DESTDIR)/etc $(DESTDIR)/usr/include $(DESTDIR)/usr/lib
+	cp $(PROJ) $(DESTDIR)/usr/bin/
+	# cp $(PROJ).conf $(DESTDIR)/etc/$(PROJ)
+	# cp lib$(PROJ).so $(DESTDIR)/usr/lib/
+	# cp $(PROJ).h $(DESTDIR)/usr/include/
+
+distclean: clean
+
+clean:
+	rm -f $(PROJ) # $(PROJ).o lib$(PROJ).so
+
+uninstall:
+	rm -f $(DESTDIR)/usr/bin/$(PROJ) # $(DESTDIR)/etc/$(PROJ) $(DESTDIR)/usr/include/$(PROJ).h $(DESTDIR)/usr/lib/lib$(PROJ).so
+
+valgrind:
+	valgrind --leak-check=full --show-leak-kinds=all --track-origins=yes --verbose --log-file=valgrind-out.txt $(COMMAND)
+
+test:
+	ld -r -b binary -o vertex_shader.o vertex.glsl
+	gcc -Wall -Wextra -pedantic -Wformat -Wformat-security -g3 -O0 -otest test.c vertex_shader.o
+
+.PHONY: valgrind clean distclean install uninstall default test
diff --git a/fiz/naloga/gl/fragment.glsl b/fiz/naloga/gl/fragment.glsl
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/fiz/naloga/gl/fragment.glsl
diff --git a/fiz/naloga/gl/helmholtz.c b/fiz/naloga/gl/helmholtz.c
new file mode 100644
index 0000000..7d8171b
--- /dev/null
+++ b/fiz/naloga/gl/helmholtz.c
@@ -0,0 +1,89 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <complex.h>
+#include <unistd.h>
+#include <GL/glxew.h>
+#include <GLFW/glfw3.h>
+extern char _binary_vertex_glsl_start[];
+extern char _binary_vertex_glsl_end[];
+extern char _binary_fragment_glsl_start[];
+extern char _binary_fragment_glsl_end[];
+void error_callback (int error, const char * description) {
+	fprintf(stderr, "error_callback: %s, error == %d\n", description, error);
+}
+void key_callback (GLFWwindow * okno, int tipka, int koda, int dejanje, int modifikatorji) {
+	fprintf(stderr, "tipka %d, koda %d, dejanje %d, modifikatorji %d, okno %p\n",
+			tipka, koda, dejanje, modifikatorji, (void *) okno);
+}
+int main (void) {
+	GLint vertex_len = _binary_vertex_glsl_end - _binary_vertex_glsl_start;
+	GLint fragment_len = _binary_fragment_glsl_end - _binary_fragment_glsl_start;
+	if (!glfwInit()) {
+		fprintf(stderr, "glfwInit failed\n");
+		return 1;
+	}
+	glfwSetErrorCallback(error_callback);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 1);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 4);
+	// glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // forward compat is ogl 3.0+
+	GLFWwindow * okno = glfwCreateWindow(800, 600, "okno", NULL, NULL);
+	if (!okno) {
+		fprintf(stderr, "glfwCreateWindow failed\n");
+		glfwTerminate();
+		return 2;
+	}
+	glfwMakeContextCurrent(okno);
+	GLenum err = glewInit();
+	if (err != GLEW_OK) {
+		fprintf(stderr, "glewInit failed: %s\n", glewGetErrorString(err));
+		return 3;
+	}
+	glfwSwapInterval(1); // vsync
+	glfwSetKeyCallback(okno, key_callback);
+	GLuint program = glCreateProgram();
+#define DO_SHADER(whi, WHI) \
+	GLuint whi##_shader = glCreateShader(GL_##WHI##_SHADER); \
+	glShaderSource(whi##_shader, 1, (const GLchar **) &_binary_##whi##_glsl_start, &whi##_len); \
+	glCompileShader(whi##_shader); \
+	GLint whi##_success = 0; \
+	glGetShaderiv(whi##_shader, GL_COMPILE_STATUS, &whi##_success); \
+	if (whi##_success == GL_FALSE) { \
+		GLint logSize = 0; \
+		glGetShaderiv(whi##_shader, GL_INFO_LOG_LENGTH, &logSize); \
+		char infoLog[logSize]; \
+		glGetShaderInfoLog(whi##_shader, logSize, &logSize, infoLog); \
+		fprintf(stderr, "prevod shaderja ni uspel. dnevnik:\n%s\n", infoLog); \
+		glDeleteShader(whi##_shader); \
+		return 4; \
+	} \
+	glAttachShader(program, whi##_shader);
+	DO_SHADER(vertex, VERTEX);
+	DO_SHADER(fragment, FRAGMENT);
+	glLinkProgram(program);
+	GLint isLinked = 0;
+	glGetProgramiv(program, GL_LINK_STATUS, &isLinked);
+	if (isLinked == GL_FALSE) {
+		GLint logSize = 0;
+		glGetProgramiv(program, GL_INFO_LOG_LENGTH, &logSize);
+		char infoLog[logSize];
+		glGetProgramInfoLog(program, logSize, &logSize, infoLog);
+		fprintf(stderr, "linkanje programa ni uspelo. dnevnik:\n%s\n", infoLog);
+		glDeleteShader(vertex_shader);
+		glDeleteShader(fragment_shader);
+		glDeleteProgram(program);
+		return 5;
+	}
+	glDetachShader(program, vertex_shader); // TODO: ali lahko glDeleteShader po linku?
+	glDetachShader(program, fragment_shader);
+	while (!glfwWindowShouldClose(okno)) {
+		int w, h;
+		glfwGetFramebufferSize(okno, &w, &h);
+		glViewport(0, 0, w, h);
+		
+		glfwSwapBuffers(okno);
+		glfwWaitEvents(); // glfwPollEvents pa returna takoj
+	}
+	glfwDestroyWindow(okno);
+	glfwTerminate();
+	return 0;
+}
diff --git a/fiz/naloga/gl/test.c b/fiz/naloga/gl/test.c
new file mode 100644
index 0000000..7aff87c
--- /dev/null
+++ b/fiz/naloga/gl/test.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+extern char _binary_vertex_glsl_start[];
+extern char _binary_vertex_glsl_end[];
+int main (void) {
+	fwrite(_binary_vertex_glsl_start, (_binary_vertex_glsl_end - _binary_vertex_glsl_start), 1, stdout);
+	return 0;
+}
diff --git a/fiz/naloga/gl/vertex.glsl b/fiz/naloga/gl/vertex.glsl
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/fiz/naloga/gl/vertex.glsl