Sistemas de Interfaces com o Usuário e OpenGL (com IUP ou GLUT)

Transcrição

1 Sistemas de Interfaces com o Usuário e OpenGL (com IUP ou GLUT) Objetos de comuns interface

2 Modelo de Programação Dispositivos Toolkit de Interface (GLUT, SDK,... ) Sistema Gráfico (OpenGL, Direct3D,...) Programa Gráfico- Interativo Usuário Computador Programação Convencional Programação Convencional Os comandos são executados segundo uma ordem préestabelecida e sequencial. inicio captura dados processa dados fim

3 Eventos típicos (WIMP) KeyPress KeyRelease ButtonPress ButtonRelease Motion LeaveNotify EnterNotify WindowExposure (Repaint) Resize Timer Idle Janela A Janela C Janela B Modelo de Call Backs Processa Evento Tipo 1 Eventos Motif Visual Basic Glut IUP... Examina eventos, chama os módulos de processamento Processa Evento Tipo 2 Processa Evento Tipo 3 Programa de Aplicação

4 Visual Basic OpenGL/GLUT #include <glut.h> #include <image.h> /* Variaveis globais */ typedef struct window_impl int width; int height; Window; Window window; Image pic; int main(int argc, char **argv) pic = imgreadbmp( teste.bmp ); imggetdimensions(pic, &window.width, &window.height); /* GLUT - Initialization */ glutinit(&argc, argv); glutinitdisplaymode(glut_rgba GLUT_DOUBLE GLUT_DEPTH); glutinitwindowsize(window.width, window.height); glutcreatewindow("cg-t1"); /* Registrando callbacks */ glutdisplayfunc(displaycall); glutreshapefunc(reshapecall); glutmousefunc(mousecall); glutmotionfunc(motioncall); glutkeyboardfunc(keyboardcall); glutidlefunc(idlecall); /* GLUT main loop */ glutmainloop(); return 0;

5 Exemplo simples da GLUT void displaycall(void) glclearcolor(0.0f, 0.0f, 0.0f, 0.0f); glclear(gl_color_buffer_bit); imgdraw(pic); glflush(); glutswapbuffers(); void reshapecall(int width, int height) glviewport(0, 0, (GLsizei)width, (GLsizei)height); glmatrixmode(gl_projection); glloadidentity(); gluortho2d (0.0, (GLsizei)width, 0.0, (GLsizei)height); glmatrixmode(gl_modelview); glloadidentity(); window.width = width; window.height = height; OpenGL/IUP Exemplo Simples void main(void) IupOpen(); IupGLCanvasOpen(); if ( init() ) IupMainLoop(); IupClose();

6 Elementos de interface HBox Canvas 1 Canvas 2 Eventos: RESIZE, REPAINT, BUTTON int init(void) Ihandle *canvas1, *canvas2, *dialog; char str[80]; char* filename = get_file_name( ); if (filename==null) return 0; /* le a imagem de fundo */ image1 = imgload(filename); image2 = imggrey(image1); Incialização /* prepara um string com dim. da imagem, por exemplo "320x200" */ sprintf(str,"%dx%d",imggetwidth(image1),imggetheight(image1)); /* cria dois canvas */ canvas1 = IupGLCanvas("repaint_cb1"); IupSetAttribute(canvas1,IUP_RASTERSIZE,str); IupSetAttribute(canvas1, "RESIZE_CB", "resize_cb"); IupSetAttribute(canvas1, "BUTTON_CB", "button_cb1"); /* associa o evento de repaint a funcao repaint_cb */ IupSetFunction("repaint_cb1", (Icallback) repaint_cb1); IupSetFunction("resize_cb", (Icallback) resize_cb); IupSetFunction("button_cb1", (Icallback) button_cb1); /* cria uma dialogo janela que contém o canvas */ dialog = IupDialog( IupHbox(canvas1,canvas2,NULL)); /* constroi e coloca o dialogo principal na tela */ IupShow(dialog); return 1;

7 Diálogo de seleção de arquivos static char * get_file_name( void ) Ihandle* getfile = IupFileDlg(); char* filename = NULL; IupSetAttribute(getfile, IUP_TITLE, "Abertura de arquivo"); IupSetAttribute(getfile, IUP_DIALOGTYPE, IUP_OPEN); IupSetAttribute(getfile, IUP_FILTER, "*.tga"); IupSetAttribute(getfile, IUP_FILTERINFO, "Arquivo de imagem (*.tga)"); IupPopup(getfile, IUP_CENTER, IUP_CENTER); filename = IupGetAttribute(getfile, IUP_VALUE); return filename; Canvas 1 e 2 Evento: RESIZE int resize_cb(ihandle *self, int w, int h) IupGLMakeCurrent(self); y v h glviewport(0,0,w,h); glmatrixmode(gl_modelview); glloadidentity(); glmatrixmode(gl_projection); glloadidentity(); gluortho2d (0., w, 0., h); glrasterpos2d(0.0,0.0); return IUP_DEFAULT; w z e y e h x v w x e

8 Canvas 1 (uma maneira) Evento: REPAINT nt repaint_cb1(ihandle *self) int w = imggetwidth(image1); int h = imggetheight(image1); unsigned char *rgbdata = imggetrgbdata(image1); IupGLMakeCurrent(self); glclearcolor(0.0f, 0.0f, 0.0f, 0.0f); glclear(gl_color_buffer_bit); gldrawpixels (w, h, GL_RGB,GL_UNSIGNED_BYTE, (GLubyte *) rgbdata); glflush(); return IUP_DEFAULT; Canvas 2 (outra maneira) int repaint_cb2(ihandle *self) int w = imggetwidth(image2); int h = imggetheight(image2); unsigned char *rgbdata = imggetrgbdata(image2); int x,y; IupGLMakeCurrent(self); glclearcolor(0.0f, 0.0f, 0.0f, 0.0f); glclear(gl_color_buffer_bit); glbegin(gl_points); for (y=0;y<h;y++) for (x=0; x<w; x++) unsigned char rgb[3]; imggetpixel3ubv(image2, x, y, rgb ); glcolor3ubv(rgb); glvertex2i(x,y); glend(); glflush(); return IUP_DEFAULT;

9 TAD: Interface do módulo: image.h typedef struct Image_imp Image; Image *imgcreate (int w, int h); void imgdestroy (Image *image); int imggetwidth(image * image); int imggetheight(image * image); unsigned char * imggetrgbdata(image * image); void imgsetpixel3fv(image *image, int x, int y, float * color); void imgsetpixel3ubv(image *image, int x, int y, unsigned char *color); void imggetpixel3fv(image *image, int x, int y, float *color); void imggetpixel3ubv(image *image, int x, int y, unsigned char *color); Image * imgload(char *filename); int imgwritetga(char *filename, Image * image); Image * imgcopy(image * image); Image * imggrey(image * image); Image * imgresize(image * img0, int w1, int h1); TAD: Interface do módulo: image.h Funções do primeiro trabalho: unsigned int imgcountcolor(image *img, float tol); Image *imgreducecolors(image *img, int ncolors); unsigned char* imgnormalizecolors(image *img);

10 TAD: Implementação do módulo: image.c struct Image_imp int width; int height; float *buf; ; Image * imgcreate (int w, int h) Image * image = (Image*) malloc (sizeof(image)); assert(image); image->width =(unsigned int) w; image->height =(unsigned int) h; image->buf = (unsigned char *) malloc (w * h * 3); assert(image->buf); return image; Inscrição na lista do curso Mandar para: mgattass@inf.puc-rio.br Subj: INF1761