diff options
| -rw-r--r-- | Makefile | 2 | ||||
| -rw-r--r-- | main.c | 184 |
2 files changed, 103 insertions, 83 deletions
@@ -1,6 +1,6 @@ CFLAGS=-std=c11 -W -Wall -pedantic -O2 APP=compute-test -LIBS=-lglfw -lGLEW -lGL +LIBS=-lSDL2 -lGLEW -lGL OBJS=main.o .PHONY=all clean test @@ -1,8 +1,9 @@ +#include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <GL/glew.h> -#include <GLFW/glfw3.h> +#include <SDL2/SDL.h> #define UNUSED(a) ((void) (a)) @@ -35,54 +36,6 @@ fs_src = " color = vec4(0.5f + 0.5 * sin(time * 3.141), 0, 0, 1);\n" "}\n"; -static void -error_cb( - const int code, - const char *text -) { - UNUSED(code); - fprintf(stderr, "GLFW Error: %s\n", text); -} - -static void -key_cb( - GLFWwindow *win, - int key, - int code, - int action, - int mods -) { - UNUSED(code); - UNUSED(mods); - - if (action == GLFW_RELEASE && key == GLFW_KEY_ESCAPE) - glfwSetWindowShouldClose(win, GLFW_TRUE); -} - -static void -framebuffer_size_cb( - GLFWwindow *win, - const int width, - const int height -) { - UNUSED(win); - - fprintf(stderr, "width = %d, height = %d\n", width, height); - glViewport(0, 0, width, height); -} - -static void drop_cb( - GLFWwindow *win, - const int num_paths, - const char ** paths -) { - UNUSED(win); - - for (int i = 0; i < num_paths; i++) { - fprintf(stderr, "drop path: %s\n", paths[i]); - } -} - static GLuint compile_shader( const GLenum type, @@ -157,44 +110,73 @@ link_compute_program( } #endif -static GLFWwindow * +static SDL_Window * init(void) { - // init glfw - glfwSetErrorCallback(error_cb); - if (!glfwInit()) + if (SDL_Init(SDL_INIT_VIDEO) < 0) { + SDL_Log("SDL_Init() failed: %s", SDL_GetError()); exit(EXIT_FAILURE); - - // set api to GLES 3.2 - glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API); - glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); - glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2); + } // create window - GLFWwindow *win = glfwCreateWindow(640, 480, "Compute Test", NULL, NULL); + SDL_Window *win = SDL_CreateWindow( + "Compute Test", + SDL_WINDOWPOS_UNDEFINED, + SDL_WINDOWPOS_UNDEFINED, + 640, + 480, + SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE + ); + + // check for error if (!win) { + SDL_Log("SDL_CreateWindow() failed: %s", SDL_GetError()); + exit(EXIT_FAILURE); + } + + // set gl context majory version hint + if (SDL_GL_SetAttribute( + SDL_GL_CONTEXT_PROFILE_MASK, + SDL_GL_CONTEXT_PROFILE_ES + ) < 0) { + SDL_Log("SDL_GL_SetAttribute() failed: %s", SDL_GetError()); + exit(EXIT_FAILURE); + } + + // set gl context majory version hint + if (SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3) < 0) { + SDL_Log("SDL_GL_SetAttribute() failed: %s", SDL_GetError()); + exit(EXIT_FAILURE); + } + + // set gl context minor version hint + if (SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2) < 0) { + SDL_Log("SDL_GL_SetAttribute() failed: %s", SDL_GetError()); exit(EXIT_FAILURE); } - // set gl context - glfwMakeContextCurrent(win); + // create GL context + SDL_GLContext context = SDL_GL_CreateContext(win); + if (!context) { + SDL_Log("SDL_GL_CreateContext() failed: %s", SDL_GetError()); + exit(EXIT_FAILURE); + } // init glew // (do this immediately after setting context) - GLenum err = glewInit(); - if (err != GLEW_OK) { - fprintf(stderr, "GLEW Error: %s\n", glewGetErrorString(err)); - exit(EXIT_FAILURE); + { + GLenum err = glewInit(); + if (err != GLEW_OK) { + SDL_Log("glewInit() failed: %s", glewGetErrorString(err)); + exit(EXIT_FAILURE); + } } // set swap interval // (after context init) - glfwSwapInterval(1); - - // bind event handlers - // (after context init) - glfwSetKeyCallback(win, key_cb); - glfwSetFramebufferSizeCallback(win, framebuffer_size_cb); - glfwSetDropCallback(win, drop_cb); + if (SDL_GL_SetSwapInterval(1) < 0) { + SDL_Log("SDL_GL_SetSwapInterval() failed: %s", SDL_GetError()); + exit(EXIT_FAILURE); + } // return window return win; @@ -204,7 +186,7 @@ int main(int argc, char *argv[]) { UNUSED(argc); UNUSED(argv); - GLFWwindow *win = init(); + SDL_Window *win = init(); // generate vertex array GLuint vao; @@ -228,14 +210,15 @@ int main(int argc, char *argv[]) { GLint u_time = glGetUniformLocation(prog, "time"); // main loop - while (!glfwWindowShouldClose(win)) { + bool done = false, fullscreen = false; + while (!done) { // clear screen glClearColor(0, 0, 0, 1); glClear(GL_COLOR_BUFFER_BIT); // use program, set uniform glUseProgram(prog); - glUniform1f(u_time, glfwGetTime()); + glUniform1f(u_time, SDL_GetTicks() / 1000.0); // draw glBindVertexArray(vao); @@ -243,18 +226,55 @@ int main(int argc, char *argv[]) { glBindVertexArray(0); // swap buffer - glfwSwapBuffers(win); + SDL_GL_SwapWindow(win); // handle events - glfwPollEvents(); - // glfwWaitEvents(); + { + SDL_Event ev; + + while (SDL_PollEvent(&ev)) { + switch (ev.type) { + case SDL_QUIT: + done = true; + break; + case SDL_KEYDOWN: + switch (ev.key.keysym.sym) { + case SDLK_ESCAPE: + done = true; + + break; + case SDLK_F11: + // toggle fullscreen + fullscreen = !fullscreen; + + if (SDL_SetWindowFullscreen( + win, + fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0 + ) < 0) { + SDL_Log("SDL_SetWindowFullscreen() failed: %s", SDL_GetError()); + fullscreen = !fullscreen; + } + + break; + } + + break; + case SDL_WINDOWEVENT: + switch (ev.window.event) { + case SDL_WINDOWEVENT_SIZE_CHANGED: + // update viewport + glViewport(0, 0, ev.window.data1, ev.window.data2); + break; + } + + break; + } + } + } } // destroy window - glfwDestroyWindow(win); - - // fini glfw - glfwTerminate(); + SDL_DestroyWindow(win); // return success return EXIT_SUCCESS; |