From ef9570ca81d9ae2adf8c5e36d3ccb33d586617a1 Mon Sep 17 00:00:00 2001 From: vurtun Date: Sun, 31 May 2015 11:25:10 +0200 Subject: [PATCH] removed shitty opengl demo --- demo/opengl.c | 616 -------------------------------------------------- 1 file changed, 616 deletions(-) delete mode 100644 demo/opengl.c diff --git a/demo/opengl.c b/demo/opengl.c deleted file mode 100644 index c3b127d..0000000 --- a/demo/opengl.c +++ /dev/null @@ -1,616 +0,0 @@ -/* - Copyright (c) 2015 - vurtun - MIT licence - */ -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -#include -#include FT_FREETYPE_H -#include FT_GLYPH_H - -#include "../gui.h" - -/* macros */ -#define DTIME 16 -#define FONT_ATLAS_DEPTH 4 -#define CIRCLE_SEGMENTS 22 - -#define MIN(a,b) ((a) < (b) ? (a) : (b)) -#define MAX(a,b) ((a) < (b) ? (b) : (a)) -#define CLAMP(i,v,x) (MAX(MIN(v,x), i)) -#define LEN(a) (sizeof(a)/sizeof(a)[0]) -#define UNUSED(a) ((void)(a)) - -#include "demo.c" - -struct texCoord { - float u; - float v; -}; - -enum font_atlas_dimension { - FONT_ATLAS_DIM_64 = 64, - FONT_ATLAS_DIM_128 = 128, - FONT_ATLAS_DIM_256 = 256, - FONT_ATLAS_DIM_512 = 512, - FONT_ATLAS_DIM_1024 = 1024, - FONT_ATLAS_DIM_2048 = 2048 -}; - -struct font_atlas { - enum font_atlas_dimension dim; - gui_size range; - gui_size size; - gui_byte *memory; -}; - -struct font_glyph { - unsigned int code; - float xadvance; - short width, height; - float xoff, yoff; - struct texCoord uv[2]; -}; - -struct font { - float height; - float scale; - GLuint texture; - unsigned int glyph_count; - struct font_glyph *glyphes; - const struct font_glyph *fallback; -}; - -static void -die(const char *fmt, ...) -{ - va_list ap; - va_start(ap, fmt); - vfprintf(stderr, fmt, ap); - va_end(ap); - fputs("\n", stderr); - exit(EXIT_FAILURE); -} - -static char* -file_load(const char* path, size_t* siz) -{ - char *buf; - FILE *fd = fopen(path, "rb"); - if (!fd) { - fprintf(stderr, "Failed to open file: %s\n", path); - exit(EXIT_FAILURE); - } - fseek(fd, 0, SEEK_END); - *siz = (size_t)ftell(fd); - fseek(fd, 0, SEEK_SET); - buf = calloc(*siz, 1); - fread(buf, *siz, 1, fd); - fclose(fd); - return buf; -} - -static void -font_load_glyph(unsigned int code, struct font_glyph *glyph, FT_GlyphSlot slot) -{ - glyph->code = code; - glyph->width = (short)slot->bitmap.width; - glyph->height = (short)slot->bitmap.rows; - glyph->xoff = (float)slot->bitmap_left; - glyph->yoff = (float)slot->bitmap_top; - glyph->xadvance = (float)(slot->advance.x >> 6); -} - -static void -font_load_glyphes(FT_Face face, struct font *font, size_t range) -{ - size_t i; - int ft_err; - for (i = 0; i < range; ++i) { - unsigned int index = FT_Get_Char_Index(face, i); - if (!index) continue; - ft_err = FT_Load_Glyph(face, index, 0); - if (ft_err) continue; - ft_err = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL); - if (ft_err) continue; - font_load_glyph(index, &font->glyphes[i], face->glyph); - } -} - -static void -font_pack_glyphes(struct font *font, float width, float height, size_t range) -{ - size_t i; - float xoff = 0, yoff = 0; - float max_height = 0.0f; - for (i = 0; i < range; ++i) { - struct font_glyph *glyph = &font->glyphes[i]; - if ((xoff + glyph->width) > width) { - yoff += max_height; - max_height = 0.0f; - xoff = 0.0f; - } - - glyph->uv[0].u = xoff / width; - glyph->uv[0].v = yoff / height; - glyph->uv[1].u = (xoff + glyph->width) / width; - glyph->uv[1].v = (yoff + glyph->height) / height; - if (glyph->height > max_height) - max_height = glyph->height; - xoff += glyph->width; - } -} - -static void -font_atlas_blit(struct font_atlas *atlas, FT_GlyphSlot glyph, - size_t off_x, size_t off_y) -{ - size_t y, x; - size_t width = glyph->bitmap.width; - size_t height = glyph->bitmap.rows; - const size_t pitch = atlas->dim * FONT_ATLAS_DEPTH; - for (y = 0; y < height; y++) { - size_t x_off = off_x * FONT_ATLAS_DEPTH; - size_t y_off = (off_y + y) * pitch; - unsigned char *dst = &atlas->memory[y_off + x_off]; - for (x = 0; x < width; ++x) { - dst[0] = 255; - dst[1] = 255; - dst[2] = 255; - dst[3] = glyph->bitmap.buffer[y * width + x]; - dst += FONT_ATLAS_DEPTH; - } - } -} - -static void -font_bake_glyphes(FT_Face face, struct font_atlas *atlas, - const struct font *font) -{ - size_t i; - int ft_err; - for (i = 0; i < atlas->range; ++i) { - size_t x, y; - struct font_glyph *glyph = &font->glyphes[i]; - unsigned int index = FT_Get_Char_Index(face, i); - - if (!index) continue; - ft_err = FT_Load_Glyph(face, index, 0); - if (ft_err) continue; - ft_err = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL); - if (ft_err) continue; - - x = (gui_size)(glyph->uv[0].u * (gui_float)atlas->dim); - y = (gui_size)(glyph->uv[0].v * (gui_float)atlas->dim); - font_atlas_blit(atlas, face->glyph, x, y); - } -} - -static int -font_load(struct font *font, struct font_atlas *atlas, unsigned int height, - const unsigned char *data, size_t size) -{ - int ret = 1; - FT_Library ft_lib; - FT_Face ft_face; - - assert(font); - assert(atlas); - assert(font->glyphes); - assert(atlas->memory); - - if (!font || !atlas) - return gui_false; - if (!font->glyphes || !atlas->memory) - return gui_false; - if (FT_Init_FreeType(&ft_lib)) - return gui_false; - if (FT_New_Memory_Face(ft_lib, data, (FT_Long)size, 0, &ft_face)) - goto cleanup; - if (FT_Select_Charmap(ft_face, FT_ENCODING_UNICODE)) - goto failed; - if (FT_Set_Char_Size(ft_face, height << 6, height << 6, 96, 96)) - goto failed; - - font_load_glyphes(ft_face, font, atlas->range); - font_pack_glyphes(font, atlas->dim, atlas->dim, atlas->range); - font_bake_glyphes(ft_face, atlas, font); - -failed: - FT_Done_Face(ft_face); -cleanup: - FT_Done_FreeType(ft_lib); - return ret; -} - -static gui_size -font_get_text_width(void *handle, const gui_char *t, gui_size l) -{ - long unicode; - size_t text_width = 0; - const struct font_glyph *glyph; - size_t text_len = 0; - size_t glyph_len; - struct font *font = handle; - assert(font); - if (!t || !l) return 0; - - glyph_len = gui_utf_decode(t, &unicode, l); - while (text_len <= l && glyph_len) { - if (unicode == GUI_UTF_INVALID) return 0; - glyph = (unicode < font->glyph_count) ? &font->glyphes[unicode] : font->fallback; - glyph = (glyph->code == 0) ? font->fallback : glyph; - - text_width += (gui_size)((float)glyph->xadvance * font->scale); - glyph_len = gui_utf_decode(t + text_len, &unicode, l - text_len); - text_len += glyph_len; - } - return text_width; -} - -static void -font_draw_text(const struct font *font, float x, float y, float h, - struct gui_color color, const unsigned char *text, size_t len) -{ - struct gui_rect clip; - size_t text_len; - long unicode; - const struct font_glyph *g; - - text_len = gui_utf_decode(text, &unicode, len); - glBindTexture(GL_TEXTURE_2D, font->texture); - glColor4ub(color.r, color.g, color.b, color.a); - glBegin(GL_QUADS); - while (text_len <= len) { - float gx, gy, gh, gw, char_width = 0; - if (unicode == GUI_UTF_INVALID) break; - g = (unicode < font->glyph_count) ? - &font->glyphes[unicode] : - font->fallback; - g = (g->code == 0) ? font->fallback : g; - - - gw = (float)g->width * font->scale; - gh = (float)g->height * font->scale; - gx = x + g->xoff * font->scale; - gy = y + (h / 2) - (g->yoff * font->scale); - char_width = g->xadvance * font->scale; - - glTexCoord2f(g->uv[0].u, g->uv[0].v); - glVertex2f(gx, gy); - glTexCoord2f(g->uv[1].u, g->uv[0].v); - glVertex2f(gx + gw, gy); - glTexCoord2f(g->uv[1].u, g->uv[1].v); - glVertex2f(gx + gw, gy + gh); - glTexCoord2f(g->uv[0].u, g->uv[1].v); - glVertex2f(gx, gy + gh); - text_len += gui_utf_decode(text + text_len, &unicode, len - text_len); - x += char_width; - } - glEnd(); - glBindTexture(GL_TEXTURE_2D, 0); -} - -static void -font_del(struct font *font) -{ - glDeleteTextures(1, &font->texture); - free(font->glyphes); - free(font); -} - -static struct font* -font_new(const char *path, unsigned int font_height, unsigned int bake_height, - size_t range, enum font_atlas_dimension dim) -{ - gui_byte *ttf_blob; - gui_size ttf_blob_size; - struct font_atlas atlas; - struct font *font = calloc(sizeof(struct font), 1); - - atlas.dim = dim; - atlas.range = range; - atlas.size = atlas.dim * atlas.dim * FONT_ATLAS_DEPTH; - atlas.memory = calloc((gui_size)atlas.size, 1); - - font->glyph_count = (unsigned int)atlas.range; - font->glyphes = calloc(atlas.range, sizeof(struct font_glyph)); - font->fallback = &font->glyphes['?']; - font->scale = (float)font_height / (gui_float)bake_height; - font->height = (float)font_height; - - ttf_blob = (unsigned char*)file_load(path, &ttf_blob_size); - if (!font_load(font, &atlas, bake_height, ttf_blob, ttf_blob_size)) - goto failed; - - glGenTextures(1, &font->texture); - glBindTexture(GL_TEXTURE_2D, font->texture); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, dim, dim, 0, - GL_RGBA, GL_UNSIGNED_BYTE, atlas.memory); - - free(atlas.memory); - free(ttf_blob); - return font; - -failed: - free(atlas.memory); - free(ttf_blob); - font_del(font); - return NULL; -} - -static void -draw_line(float x0, float y0, float x1, float y1, struct gui_color color) -{ - glColor4ub(color.r, color.g, color.b, color.a); - glBegin(GL_LINES); - glVertex2f(x0, y0); - glVertex2f(x1, y1); - glEnd(); -} - -static void -draw_rect(float x, float y, float w, float h, struct gui_color color) -{ - glColor4ub(color.r, color.g, color.b, color.a); - glBegin(GL_QUADS); - glVertex2f(x, y); - glVertex2f(x + w, y); - glVertex2f(x + w, y + h); - glVertex2f(x, y + h); - glEnd(); -} - -static void -draw_circle(float x, float y, float r, struct gui_color color) -{ - int i; - float a0 = 0.0f; - const float a_step = (2 * 3.141592654f)/22.0f; - x += r; y += r; - glColor4ub(color.r, color.g, color.b, color.a); - glBegin(GL_TRIANGLES); - for (i = 0; i < CIRCLE_SEGMENTS; i++) { - const float a1 = ((i + 1) == CIRCLE_SEGMENTS) ? 0.0f : a0 + a_step; - const float p0x = x + (float)cos(a0) * r; - const float p0y = y + (float)sin(a0) * r; - const float p1x = x + (float)cos(a1) * r; - const float p1y = y + (float)sin(a1) * r; - - glVertex2f(p0x, p0y); - glVertex2f(p1x, p1y); - glVertex2f(x, y); - a0 = a1; - } - glEnd(); -} - -static void -execute(gui_command_buffer *list, int width, int height) -{ - static const struct gui_color col = {255, 0, 0, 255}; - const struct gui_command *cmd; - - glPushAttrib(GL_ENABLE_BIT|GL_COLOR_BUFFER_BIT|GL_TRANSFORM_BIT); - glEnable(GL_BLEND); - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); - glDisable(GL_CULL_FACE); - glDisable(GL_DEPTH_TEST); - glEnable(GL_SCISSOR_TEST); - glEnable(GL_TEXTURE_2D); - - glMatrixMode(GL_PROJECTION); - glPushMatrix(); - glLoadIdentity(); - glOrtho(0.0f, width, height, 0.0f, 0.0f, 1.0f); - glMatrixMode(GL_MODELVIEW); - glPushMatrix(); - glLoadIdentity(); - - gui_foreach_command(cmd, list) { - switch (cmd->type) { - case GUI_COMMAND_NOP: break; - case GUI_COMMAND_SCISSOR: { - const struct gui_command_scissor *s = gui_command(scissor, cmd); - glScissor(s->x, height - (s->y + s->h), s->w, s->h); - } break; - case GUI_COMMAND_LINE: { - const struct gui_command_line *l = gui_command(line, cmd); - draw_line(l->begin[0], l->begin[1], l->end[0], l->end[1], l->color); - } break; - case GUI_COMMAND_RECT: { - const struct gui_command_rect *r = gui_command(rect, cmd); - draw_rect(r->x, r->y, r->w, r->h, r->color); - } break; - case GUI_COMMAND_CIRCLE: { - const struct gui_command_circle *c = gui_command(circle, cmd); - draw_circle(c->x, c->y, (float)c->w / 2.0f, c->color); - } break; - case GUI_COMMAND_TRIANGLE: { - const struct gui_command_triangle *t = gui_command(triangle, cmd); - glColor4ub(t->color.r, t->color.g, t->color.b, t->color.a); - glBegin(GL_TRIANGLES); - glVertex2f(t->a[0], t->a[1]); - glVertex2f(t->b[0], t->b[1]); - glVertex2f(t->c[0], t->c[1]); - glEnd(); - } break; - case GUI_COMMAND_TEXT: { - const struct gui_command_text *t = gui_command(text, cmd); - font_draw_text(t->font, t->x, t->y, t->h, t->fg, t->string, t->length); - } break; - case GUI_COMMAND_IMAGE: - case GUI_COMMAND_MAX: - default: break; - } - } - - glBindTexture(GL_TEXTURE_2D, 0); - glMatrixMode(GL_MODELVIEW); - glPopMatrix(); - glMatrixMode(GL_PROJECTION); - glPopMatrix(); - glPopAttrib(); -} - -static void -draw(struct gui_stack *stack, int width, int height) -{ - struct gui_panel*iter; - gui_foreach_panel(iter, stack) - execute(iter->buffer, width, height); -} - -static void -key(struct gui_input *in, SDL_Event *evt, gui_bool down) -{ - SDL_Keycode sym = evt->key.keysym.sym; - if (sym == SDLK_LCTRL || sym == SDLK_RCTRL) - gui_input_key(in, GUI_KEY_CTRL, down); - else if (sym == SDLK_RSHIFT || sym == SDLK_LSHIFT) - gui_input_key(in, GUI_KEY_SHIFT, down); - else if (sym == SDLK_DELETE) - gui_input_key(in, GUI_KEY_DEL, down); - else if (sym == SDLK_RETURN) - gui_input_key(in, GUI_KEY_ENTER, down); - else if (sym == SDLK_SPACE) - gui_input_key(in, GUI_KEY_SPACE, down); - else if (sym == SDLK_BACKSPACE) - gui_input_key(in, GUI_KEY_BACKSPACE, down); -} - -static void -motion(struct gui_input *in, SDL_Event *evt) -{ - const gui_int x = evt->motion.x; - const gui_int y = evt->motion.y; - gui_input_motion(in, x, y); -} - -static void -btn(struct gui_input *in, SDL_Event *evt, gui_bool down) -{ - const gui_int x = evt->button.x; - const gui_int y = evt->button.y; - if (evt->button.button == SDL_BUTTON_LEFT) - gui_input_button(in, x, y, down); -} - -static void -text(struct gui_input *in, SDL_Event *evt) -{ - gui_glyph glyph; - memcpy(glyph, evt->text.text, GUI_UTF_SIZE); - gui_input_char(in, glyph); -} - -static void -resize(SDL_Event *evt) -{ - if (evt->window.event != SDL_WINDOWEVENT_RESIZED) return; - glViewport(0, 0, evt->window.data1, evt->window.data2); -} - -int -main(int argc, char *argv[]) -{ - /* Platform */ - const char *font_path; - SDL_Window *win; - SDL_GLContext glContext; - struct font *glfont; - int win_width, win_height; - unsigned int started; - unsigned int dt; - int width = 0, height = 0; - - /* GUI */ - struct gui_input in; - struct gui_font font; - struct demo_gui gui; - - font_path = argv[1]; - if (argc < 2) { - fprintf(stdout, "Missing TTF Font file argument!"); - exit(EXIT_FAILURE); - } - - /* SDL */ - SDL_Init(SDL_INIT_VIDEO|SDL_INIT_TIMER|SDL_INIT_EVENTS); - SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1); - win = SDL_CreateWindow("Demo", - SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, - WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_OPENGL|SDL_WINDOW_SHOWN); - glContext = SDL_GL_CreateContext(win); - SDL_GetWindowSize(win, &win_width, &win_height); - glViewport(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT); - glfont = font_new(font_path, 10, 10, 255, FONT_ATLAS_DIM_256); - - /* GUI */ - memset(&in, 0, sizeof in); - memset(&gui, 0, sizeof gui); - gui.memory = malloc(MAX_MEMORY); - font.userdata = glfont; - font.height = glfont->height; - font.width = font_get_text_width; - init_demo(&gui, &font); - - while (gui.running) { - /* Input */ - SDL_Event evt; - started = SDL_GetTicks(); - gui_input_begin(&in); - while (SDL_PollEvent(&evt)) { - if (evt.type == SDL_WINDOWEVENT) resize(&evt); - else if (evt.type == SDL_QUIT) goto cleanup; - else if (evt.type == SDL_KEYUP) key(&in, &evt, gui_false); - else if (evt.type == SDL_KEYDOWN) key(&in, &evt, gui_true); - else if (evt.type == SDL_MOUSEBUTTONDOWN) btn(&in, &evt, gui_true); - else if (evt.type == SDL_MOUSEBUTTONUP) btn(&in, &evt, gui_false); - else if (evt.type == SDL_MOUSEMOTION) motion(&in, &evt); - else if (evt.type == SDL_TEXTINPUT) text(&in, &evt); - } - gui_input_end(&in); - - /* GUI */ - SDL_GetWindowSize(win, &width, &height); - run_demo(&gui, &in); - - /* Draw */ - glClearColor(0.4f, 0.4f, 0.4f, 1.0f); - glClear(GL_COLOR_BUFFER_BIT); - draw(&gui.stack, width, height); - SDL_GL_SwapWindow(win); - - /* Timing */ - dt = SDL_GetTicks() - started; - if (dt < DTIME) - SDL_Delay(DTIME - dt); - } - -cleanup: - /* Cleanup */ - free(gui.memory); - font_del(glfont); - SDL_GL_DeleteContext(glContext); - SDL_DestroyWindow(win); - SDL_Quit(); - return 0; -} -