diff options
Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 193 |
1 files changed, 140 insertions, 53 deletions
@@ -9,9 +9,15 @@ #include "gl.c" #include "time.c" #include "util.c" +#if _WIN32 +#include "filesystem-win.c" +#else +#include "filesystem-posix.c" +#endif typedef struct { GLuint program; + GLuint vbo, vao; struct timespec last_modified; char vfilename[64], ffilename[64]; } Shader; @@ -43,9 +49,21 @@ static void shader_load(Shader *shader, char const *vfilename, char const *ffile fread(vcode, 1, vsize, vfp); fread(fcode, 1, fsize, ffp); + GLuint program = gl_compile_and_link_shaders(vcode, fcode); - if (program) + if (program) { shader->program = program; + if (shader->vbo) glDeleteBuffers(1, &shader->vbo); + if (shader->vao) glDeleteVertexArrays(1, &shader->vao); + GLuint vbo = 0; + glGenBuffers(1, &vbo); + GLuint vao = 0; + if (gl_version_major >= 3) + glGenVertexArrays(1, &vao); + + shader->vbo = vbo; + shader->vao = vao; + } } else print("Out of memory.\n"); free(vcode); free(fcode); } else { @@ -69,6 +87,54 @@ static void shader_check_for_changes(Shader *shader) { } } +static double start_time; + +static void shader_draw(Shader *shader, Rect where) { + shader_check_for_changes(shader); + float x1, y1, x2, y2; + rect_coords(where, &x1, &y1, &x2, &y2); + + if (shader->vao) + glBindVertexArray(shader->vao); + glBindBuffer(GL_ARRAY_BUFFER, shader->vbo); + v2 buffer_data[] = { + // gl coordinates (v_render_pos) + {x1, y1}, + {x2, y1}, + {x1, y2}, + + {x2, y1}, + {x2, y2}, + {x1, y2}, + + // normalized coordinates (v_pos) + {0, 0}, + {1, 0}, + {0, 1}, + + {1, 0}, + {1, 1}, + {0, 1}, + }; + + glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)sizeof buffer_data, buffer_data, GL_STATIC_DRAW); + GLuint v_render_pos = gl_attrib_loc(shader->program, "v_render_pos"); + GLuint v_pos = gl_attrib_loc(shader->program, "v_pos"); + if (v_render_pos != (GLuint)-1) { + glVertexAttribPointer(v_render_pos, 2, GL_FLOAT, 0, sizeof(v2), NULL); + glEnableVertexAttribArray(v_render_pos); + } + if (v_pos != (GLuint)-1) { + glVertexAttribPointer(v_pos, 2, GL_FLOAT, 0, sizeof(v2), (void *)(6 * sizeof(v2))); + glEnableVertexAttribArray(v_pos); + } + glUseProgram(shader->program); + GLint u_time = gl_uniform_loc(shader->program, "u_time"); + if (u_time >= 0) + glUniform1f(u_time, (float)fmod(time_get_seconds() - start_time, 10000)); + glDrawArrays(GL_TRIANGLES, 0, 6); +} + static void die(char const *fmt, ...) { char buf[256] = {0}; @@ -142,63 +208,70 @@ int main(void) { SDL_GL_SetSwapInterval(1); // vsync - Shader shader = {0}; - shader_load(&shader, "1v.glsl", "1f.glsl"); + Shader *shaders = NULL; - GLuint vbo = 0; - glGenBuffers(1, &vbo); - GLuint vao = 0; - if (gl_version_major >= 3) - glGenVertexArrays(1, &vao); - - v2 buffer_data[] = { - // gl coordinates (v_render_pos) - {-1, -1}, - {+1, -1}, - {-1, +1}, - - {+1, -1}, - {+1, +1}, - {-1, +1}, - - // normalized coordinates (v_pos) - {0, 0}, - {1, 0}, - {0, 1}, - - {1, 0}, - {1, 1}, - {0, 1}, - }; + char **files = fs_list_directory("."); + size_t nfiles; for (nfiles = 0; files[nfiles]; ++nfiles); + qsort(files, nfiles, sizeof *files, str_qsort_case_insensitive_cmp); - if (vao) glBindVertexArray(vao); - glBindBuffer(GL_ARRAY_BUFFER, vbo); - glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)sizeof buffer_data, buffer_data, GL_STATIC_DRAW); - GLuint v_render_pos = gl_attrib_loc(shader.program, "v_render_pos"); - GLuint v_pos = gl_attrib_loc(shader.program, "v_pos"); - if (v_render_pos != (GLuint)-1) { - glVertexAttribPointer(v_render_pos, 2, GL_FLOAT, 0, sizeof(v2), NULL); - glEnableVertexAttribArray(v_render_pos); + u16 nshaders = 0; + for (size_t i = 0; i < nfiles; ++i) { + nshaders += str_is_suffix(files[i], "v.glsl"); } - if (v_pos != (GLuint)-1) { - glVertexAttribPointer(v_pos, 2, GL_FLOAT, 0, sizeof(v2), (void *)(6 * sizeof(v2))); - glEnableVertexAttribArray(v_pos); + + u16 shader_idx = 0; + for (size_t i = 0; i < nfiles; ++i) { + if (str_is_suffix(files[i], "v.glsl")) { + char const *vfilename = files[i]; + char ffilename[64]; + strbuf_cpy(ffilename, vfilename); + ffilename[strlen(ffilename) - 6] = 'f'; + Shader shader = {0}; + shader_load(&shader, vfilename, ffilename); + arr_add(shaders, shader); + ++shader_idx; + } + free(files[i]); } - bool quit = false; - double start = time_get_seconds(); + i32 viewing_shader = -1; + + free(files); + + bool quit = false, fullscreen = false; + start_time = time_get_seconds(); while (!quit) { SDL_Event event = {0}; + int window_width, window_height; + SDL_GetWindowSize(window, &window_width, &window_height); + v2 *mouse_clicks = NULL; while (SDL_PollEvent(&event)) { switch (event.type) { case SDL_QUIT: quit = true; break; + case SDL_MOUSEBUTTONDOWN: { + float x = -1 + 2 * (float)event.button.x / (float)window_width; + float y = +1 - 2 * (float)event.button.y / (float)window_height; + arr_add(mouse_clicks, V2(x, y)); + } break; + case SDL_KEYDOWN: + switch (event.key.keysym.sym) { + case SDLK_ESCAPE: + if (viewing_shader == -1) + quit = true; + else + viewing_shader = -1; + break; + case SDLK_F11: + fullscreen = !fullscreen; + SDL_SetWindowFullscreen(window, fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0); + break; + } + break; } } - int window_width, window_height; - SDL_GetWindowSize(window, &window_width, &window_height); // set up GL glEnable(GL_BLEND); @@ -207,18 +280,32 @@ int main(void) { glClearColor(0, 0, 0, 1); glClear(GL_COLOR_BUFFER_BIT); - shader_check_for_changes(&shader); - - if (shader.program) { - if (vao) glBindVertexArray(vao); - glBindBuffer(GL_ARRAY_BUFFER, vbo); - glUseProgram(shader.program); - GLint u_time = gl_uniform_loc(shader.program, "u_time"); - if (u_time >= 0) - glUniform1f(u_time, (float)fmod(time_get_seconds() - start, 10000)); - glDrawArrays(GL_TRIANGLES, 0, 6); + if (viewing_shader >= 0) { + // one shader + Shader *shader = &shaders[viewing_shader]; + shader_draw(shader, rect4(-1, -1, +1, +1)); + } else { + // shader gallery + u16 idx = 0; + float w = 2 * 1.0f / 6; + float h = 2 * 1.0f / ((nshaders + 5) / 6); + h = minf(h, 1.0f / 3); + arr_foreach_ptr(shaders, Shader, shader) { + float x1 = -1 + (idx % 6) * w; + float y1 = 1 - h - (idx / 6) * h; + Rect r = rect(V2(x1, y1), V2(w, h)); + r = rect_shrink(r, 0.02f); + arr_foreach_ptr(mouse_clicks, v2, click) { + if (rect_contains_point(r, *click)) + viewing_shader = idx; + } + shader_draw(shader, r); + ++idx; + } } + + arr_clear(mouse_clicks); SDL_GL_SwapWindow(window); } |