From a779dae5d38516943081d410d65ace286402dd4a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Anton=20Luka=20=C5=A0ijanec?= Date: Sat, 7 May 2022 00:37:25 +0200 Subject: =?UTF-8?q?grem=20na=20drug=20ra=C4=8Dunalnik,=20da=20dobim=20open?= =?UTF-8?q?gl=203.3?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- fiz/naloga/gl/.gitignore | 2 + fiz/naloga/gl/Makefile | 40 ++++++++++++++++++++ fiz/naloga/gl/fragment.glsl | 0 fiz/naloga/gl/helmholtz.c | 89 +++++++++++++++++++++++++++++++++++++++++++++ fiz/naloga/gl/test.c | 7 ++++ fiz/naloga/gl/vertex.glsl | 0 6 files changed, 138 insertions(+) create mode 100644 fiz/naloga/gl/.gitignore create mode 100644 fiz/naloga/gl/Makefile create mode 100644 fiz/naloga/gl/fragment.glsl create mode 100644 fiz/naloga/gl/helmholtz.c create mode 100644 fiz/naloga/gl/test.c create mode 100644 fiz/naloga/gl/vertex.glsl (limited to 'fiz') 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 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 +#include +#include +#include +#include +#include +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 +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 -- cgit v1.2.3