ref: 915c8527831c2425e3daaf9df5f02c93b27f31d8
dir: /SDL_Examples/menu.c/
/* OPENIMGUI STANDARD DEMO Demo of Gek's proposed Open Immediate Mode Gui Standard */ //#define PLAY_MUSIC #include <math.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "../include/GL/gl.h" #include "../include/zbuffer.h" #define CHAD_API_IMPL #define CHAD_MATH_IMPL #include "../include-demo/3dMath.h" #ifdef PLAY_MUSIC #include "../include-demo/api_audio.h" #else typedef unsigned char uchar; #endif #include <SDL/SDL.h> // Gek's OpenIMGUI standard. #define OPENIMGUI_IMPL #include "../include-demo/openimgui.h" #ifndef M_PI #define M_PI 3.14159265 #endif int winSizeX = 640; int winSizeY = 480; double tpassed = 0; int isRunning = 1; int dirbstates[4] = {0, 0, 0, 0}; // up,down,left,right int mousepos[2] = {0, 0}; int using_cursorkeys = 0; // Switches to cursor keys upon pressing a key. int mb = 0; // cursor button int mb2 = 0; // cursor second button. #define BEGIN_EVENT_HANDLER \ void events(SDL_Event* e) { \ switch (e->type) { #define E_KEYSYM e->key.keysym.sym #define END_EVENT_HANDLER \ } \ } #define EVENT_HANDLER events #define E_MOTION e->motion #define E_BUTTON e->button.button #define E_WINEVENT e->window.event #define E_WINW e->window.data1 #define E_WINH e->window.data2 vec3 mouse_to_normal(int mx, int my) { vec3 r; r.d[0] = mx / (float)winSizeX; r.d[1] = my / (float)winSizeY; return r; } void drawBox(GLfloat x, GLfloat y, GLfloat xdim, GLfloat ydim) { // 0,0 is top left, 1,1 is bottom right x *= 2; xdim *= 2; y *= 2; ydim *= 2; glBegin(GL_TRIANGLES); // TRIANGLE 1, glTexCoord2f(0, 0); glVertex3f(-1 + x, 1 - y - ydim, 0.5); // Bottom Left Corner glTexCoord2f(1, -1); glVertex3f(-1 + x + xdim, 1 - y, 0.5); // Top Right Corner glTexCoord2f(0, -1); glVertex3f(-1 + x, 1 - y, 0.5); // Top Left // TRIANGLE 2 glTexCoord2f(0, 0); glVertex3f(-1 + x, 1 - y - ydim, 0.5); // Bottom Left Corner glTexCoord2f(1, 0); glVertex3f(-1 + x + xdim, 1 - y - ydim, 0.5); glTexCoord2f(1, -1); glVertex3f(-1 + x + xdim, 1 - y, 0.5); // Top Right Corner glEnd(); return; } void drawMouse() { if (!omg_cb) glColor3f(0.7, 0.7, 0.7); else glColor3f(1.0, 0.1, 0.1); // if(!using_cursorkeys) drawBox(omg_cursorpos[0], omg_cursorpos[1], 0.03, 0.03); // else // drawBox(omg_cursorpos_presuck[0],omg_cursorpos_presuck[1], 0.03, 0.03); } void drawTB(const char* text, GLuint textcolor, GLfloat x, GLfloat y, GLint size, float* tw, float* th) { size = (size > 64) ? 64 : ((size < 8) ? 8 : size); size >>= 3; // divide by 8 to get the GLTEXTSIZE if (!size || !text) return; int mw = 0, h = 1, cw = 0; // max width, height, current width for (int i = 0; text[i] != '\0' && (text[i] & 127); i++) { if (text[i] != '\n') cw++; else { cw = 0; h++; } if (mw < cw) mw = cw; } float w = (size)*8 * (mw) / (float)winSizeX; float bw = 3 * size / (float)winSizeX; float h_ = (size)*8 * (h) / (float)winSizeY; float bh = 3 * size / (float)winSizeY; drawBox(x, y, w, h_); *tw = w + bw; *th = h_ + bh; glTextSize(size); glDrawText((unsigned char*)text, x * winSizeX, y * winSizeY, textcolor); return; } int omg_box(float x, float y, float xdim, float ydim, int sucks, float buttonjumpx, float buttonjumpy, int hints) { // hints is the color of the box. float r = ((hints & 0xFF0000) >> 16) / 255.0; float g = ((hints & 0xFF00) >> 8) / 255.0; float b = ((hints & 0xFF)) / 255.0; glColor3f(r, g, b); drawBox(x, y, xdim, ydim); omg_box_suck(x, y, xdim, ydim, sucks, buttonjumpx, buttonjumpy); return omg_box_retval(x, y, xdim, ydim); } int omg_textbox(float x, float y, const char* text, int textsize, int sucks, float buttonjumpx, float buttonjumpy, int hints, int hintstext) { float r = ((hints & 0xFF0000) >> 16) / 255.0; float g = ((hints & 0xFF00) >> 8) / 255.0; float b = ((hints & 0xFF)) / 255.0; glColor3f(r, g, b); float xdim = 0, ydim = 0; drawTB(text, (GLuint)hintstext, x, y, textsize, &xdim, &ydim); omg_box_suck(x, y, xdim, ydim, sucks, buttonjumpx, buttonjumpy); return omg_box_retval(x, y, xdim, ydim); } int haveclicked = 0; // For our toggleable movable button. vec3 tbcoords = (vec3){{0.4, 0.4, 0}}; vec3 slidcoords = (vec3){{0.1, 0.8, 0}}; float slidmoffset = 0; int slidersliding = 0; // Is the slider being slid? void draw() { if (mb2) { // Use an additional input to move gui elements for testing- right click moves the button. tbcoords.d[0] = omg_cursorpos[0]; tbcoords.d[1] = omg_cursorpos[1]; haveclicked = 0; } if (omg_textbox(0.01, 0, "\nEntry 1\n", 24, 1, 0.4, 0.2, 0xFFFFFF, 0) && omg_cb == 2) puts("Entry 1"); if (omg_textbox(0.01, 0.2, "\nEntry 2\n", 24, 1, 0.4, 0.2, 0xFFFFFF, 0) && omg_cb == 2) puts("Entry 2"); if (omg_textbox(0.01, 0.4, "\nEntry 3\n", 24, 1, 0.4, 0.2, 0xFFFFFF, 0) && omg_cb == 2) puts("Entry 3"); if (omg_textbox(0.01, 0.6, "\nQuit\n", 24, 1, 0.4, 0.2, 0xFFFFFF, 0) && omg_cb == 2) { puts("Quitting..."); isRunning = 0; } if (omg_textbox(tbcoords.d[0], tbcoords.d[1], "\nClick me and I toggle color!\n", 16, 1, 0.4, 0.3, 0xFFFFFF, haveclicked ? 0xFF0000 : 0x00) && omg_cb == 1) { puts("Detected click! EVENT FIRED!\n"); haveclicked = !haveclicked; } // A slider element if (omg_textbox(slidcoords.d[0], slidcoords.d[1], "\n Slider \n", 16, 1, 0.4, 0.3, 0xFFFFFF, haveclicked ? 0xFF0000 : 0x00) && omg_cb == 1) { slidersliding = 1; slidmoffset = omg_cursorpos[0] - slidcoords.d[0]; } if (omg_cb == 2) slidersliding = 0; // Handle the slider sliding behavior. if (slidersliding) { if (using_cursorkeys) { if (omg_udlr[3]) { slidcoords.d[0] = clampf(slidcoords.d[0] + 0.05, 0.1, 0.7); } if (omg_udlr[2]) { slidcoords.d[0] = clampf(slidcoords.d[0] - 0.05, 0.1, 0.7); } omg_cursorpos[0] = slidcoords.d[0] + slidmoffset; omg_cursorpos[1] = slidcoords.d[1]; } else { // Move the element to the cursorposition's x. slidcoords.d[0] = clampf(omg_cursorpos[0] - slidmoffset, 0.1, 0.7); } printf("Slider's value is %f\n", slidcoords.d[0]); } drawMouse(); } void initScene() { static GLfloat pos[4] = {5.0, 5.0, 10.0, 0.0}; static GLfloat white[4] = {1.0, 1.0, 1.0, 0.0}; glLightfv(GL_LIGHT0, GL_POSITION, pos); glLightfv(GL_LIGHT0, GL_DIFFUSE, white); // glLightfv( GL_LIGHT0, GL_AMBIENT, white); // glLightfv( GL_LIGHT0, GL_SPECULAR, white); // glEnable(GL_CULL_FACE); glDisable(GL_CULL_FACE); glDisable(GL_BLEND); // glEnable(GL_LIGHTING); // glEnable(GL_TEXTURE_2D); glDisable(GL_TEXTURE_2D); glDisable(GL_LIGHTING); // glEnable( GL_LIGHT0 ); glDisable(GL_DEPTH_TEST); glDepthMask(GL_FALSE); glShadeModel(GL_SMOOTH); glTextSize(GL_TEXT_SIZE24x24); glEnable(GL_NORMALIZE); } BEGIN_EVENT_HANDLER case SDL_KEYDOWN: using_cursorkeys = 1; switch (E_KEYSYM) { case SDLK_ESCAPE: case SDLK_q: isRunning = 0; break; case SDLK_UP: dirbstates[0] = 1; break; case SDLK_DOWN: dirbstates[1] = 1; break; case SDLK_LEFT: dirbstates[2] = 1; break; case SDLK_RIGHT: dirbstates[3] = 1; break; case SDLK_SPACE: case SDLK_RETURN: mb = 1; break; default: break; } break; case SDL_KEYUP: using_cursorkeys = 1; switch (E_KEYSYM) { case SDLK_SPACE: case SDLK_RETURN: mb = 0; break; case SDLK_UP: dirbstates[0] = 0; break; case SDLK_DOWN: dirbstates[1] = 0; break; case SDLK_LEFT: dirbstates[2] = 0; break; case SDLK_RIGHT: dirbstates[3] = 0; break; default: break; } break; case SDL_QUIT: isRunning = 0; break; case SDL_MOUSEBUTTONDOWN: if (E_BUTTON == SDL_BUTTON_LEFT) mb = 1; if (E_BUTTON == SDL_BUTTON_RIGHT) { mb2 = 1; } break; case SDL_MOUSEBUTTONUP: if (E_BUTTON == SDL_BUTTON_LEFT) mb = 0; if (E_BUTTON == SDL_BUTTON_RIGHT) mb2 = 0; break; case SDL_MOUSEMOTION: using_cursorkeys = 0; mousepos[0] = E_MOTION.x; mousepos[1] = E_MOTION.y; break; END_EVENT_HANDLER int main(int argc, char** argv) { // initialize SDL video: unsigned int fps = 0; char needsRGBAFix = 0; if (argc > 2) { char* larg = argv[1]; for (int i = 0; i < argc; i++) { if (!strcmp(larg, "-w")) winSizeX = atoi(argv[i]); if (!strcmp(larg, "-h")) winSizeY = atoi(argv[i]); if (!strcmp(larg, "-fps")) fps = strtoull(argv[i], 0, 10); larg = argv[i]; } } #ifdef PLAY_MUSIC if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) { #else if (SDL_Init(SDL_INIT_VIDEO) < 0) { #endif fprintf(stderr, "ERROR: cannot initialize SDL video.\n"); return 1; } #ifdef PLAY_MUSIC ainit(0); #endif SDL_Surface* screen = NULL; if ((screen = SDL_SetVideoMode(winSizeX, winSizeY, TGL_FEATURE_RENDER_BITS, SDL_SWSURFACE)) == 0) { fprintf(stderr, "ERROR: Video mode set failed.\n"); return 1; } printf("\nRMASK IS %u", screen->format->Rmask); printf("\nGMASK IS %u", screen->format->Gmask); printf("\nBMASK IS %u", screen->format->Bmask); printf("\nAMASK IS %u", screen->format->Amask); #if TGL_FEATURE_RENDER_BITS == 32 if (screen->format->Rmask != 0x00FF0000 || screen->format->Gmask != 0x0000FF00 || screen->format->Bmask != 0x000000FF) { needsRGBAFix = 1; printf("\nYour screen is using an RGBA output different than this library expects."); printf("\nYou should consider using the 16 bit version for optimal performance"); } #endif printf("\nRSHIFT IS %u", screen->format->Rshift); printf("\nGSHIFT IS %u", screen->format->Gshift); printf("\nBSHIFT IS %u", screen->format->Bshift); printf("\nASHIFT IS %u\n", screen->format->Ashift); fflush(stdout); #ifdef PLAY_MUSIC track* myTrack = NULL; myTrack = lmus("WWGW.mp3"); mplay(myTrack, -1, 1000); #endif SDL_ShowCursor(SDL_ENABLE); SDL_WM_SetCaption(argv[0], 0); // initialize TinyGL: int mode; switch (screen->format->BitsPerPixel) { case 16: // fprintf(stderr,"\nUnsupported by maintainer!!!"); mode = ZB_MODE_5R6G5B; // return 1; break; case 32: mode = ZB_MODE_RGBA; break; default: return 1; break; } ZBuffer* frameBuffer = ZB_open(winSizeX, winSizeY, mode, 0); glInit(frameBuffer); // initialize GL: glClearColor(0.0, 0.0, 0.0, 0.0); glViewport(0, 0, winSizeX, winSizeY); glEnable(GL_DEPTH_TEST); // GLfloat h = (GLfloat) winSizeY / (GLfloat) winSizeX; glMatrixMode(GL_PROJECTION); glLoadIdentity(); // glFrustum( -1.0, 1.0, -h, h, 5.0, 60.0 ); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); // glTranslatef( 0.0, 0.0, -45.0 ); initScene(); // variables for timing: long long unsigned int frames = 0; unsigned int tNow = SDL_GetTicks(); unsigned int tLastFps = tNow; // main loop: while (isRunning) { ++frames; tpassed += frames * 16.666666 / 1000.0; tNow = SDL_GetTicks(); // do event handling: SDL_Event ev; while (SDL_PollEvent(&ev)) events(&ev); if (using_cursorkeys) omg_update_keycursor(dirbstates[0], dirbstates[1], dirbstates[2], dirbstates[3], mb); else { vec3 r = mouse_to_normal(mousepos[0], mousepos[1]); omg_update_mcursor(r.d[0], r.d[1], mb); } // draw scene: glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // This is where we render our GUI! draw(); // glDrawText((unsigned char*)"\nBlitting text\nto the screen!", 0, 0, 0x000000FF); // swap buffers: if (SDL_MUSTLOCK(screen) && (SDL_LockSurface(screen) < 0)) { fprintf(stderr, "SDL ERROR: Can't lock screen: %s\n", SDL_GetError()); return 1; } // Quickly convert all pixels to the correct format #if TGL_FEATURE_RENDER_BITS == 32 if (needsRGBAFix) for (int i = 0; i < frameBuffer->xsize * frameBuffer->ysize; i++) { #define DATONE (frameBuffer->pbuf[i]) DATONE = ((DATONE & 0x000000FF)) << screen->format->Rshift | ((DATONE & 0x0000FF00) >> 8) << screen->format->Gshift | ((DATONE & 0x00FF0000) >> 16) << screen->format->Bshift; } #endif ZB_copyFrameBuffer(frameBuffer, screen->pixels, screen->pitch); if (SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen); SDL_Flip(screen); if (fps > 0) if ((1000 / fps) > (SDL_GetTicks() - tNow)) { SDL_Delay((1000 / fps) - (SDL_GetTicks() - tNow)); // Yay stable framerate! } // check for error conditions: char* sdl_error = SDL_GetError(); if (sdl_error[0] != '\0') { fprintf(stderr, "SDL ERROR: \"%s\"\n", sdl_error); SDL_ClearError(); } // update fps: if (tNow >= tLastFps + 5000) { printf("%llu frames in %f secs, %f frames per second.\n", frames, (float)(tNow - tLastFps) * 0.001f, (float)frames * 1000.0f / (float)(tNow - tLastFps)); tLastFps = tNow; frames = 0; } } printf("%llu frames in %f secs, %f frames per second.\n", frames, (float)(tNow - tLastFps) * 0.001f, (float)frames * 1000.0f / (float)(tNow - tLastFps)); // cleanup: ZB_close(frameBuffer); glClose(); if (SDL_WasInit(SDL_INIT_VIDEO)) SDL_QuitSubSystem(SDL_INIT_VIDEO); #ifdef PLAY_MUSIC mhalt(); Mix_FreeMusic(myTrack); acleanup(); #endif SDL_Quit(); return 0; }