313 lines
11 KiB
C++
313 lines
11 KiB
C++
//
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// Unit tests for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2022 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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#include "unittests.h"
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#include <FL/Fl_Group.H>
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#include <FL/Fl_Button.H>
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#include <FL/Fl_Radio_Button.H>
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#include <FL/Fl_Check_Button.H>
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#include <FL/fl_draw.H>
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#include <stdlib.h>
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// Note: currently (March 2010) fl_draw_image() supports transparency with
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// alpha channel only on Apple (Mac OS X), but Fl_RGB_Image->draw()
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// supports transparency on all platforms !
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//
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//------- test the image drawing capabilities of this implementation ----------
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//
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// Parameters for fine tuning for developers.
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// Default values: CB=1, DX=0, IMG=1, LX=0, FLIPH=0
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static int cb = 1; // 1 to show the checker board background for alpha images,
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// 0 otherwise
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static int dx = 0; // additional (undefined (0)) pixels per line, must be >= 0
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// ignored (irrelevant), if LX == 0 (see below)
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static int img = 1; // 1 to use Fl_RGB_Image for drawing images with transparency,
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// 0 to use fl_draw_image() instead.
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// Note: as of Feb 2016, only 1 (Fl_RGB_Image) works with
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// alpha channel, 0 (fl_draw_image()) ignores the alpha
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// channel (FLTK 1.3.x).
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// There are plans to support transparency (alpha channel)
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// in fl_draw_image() in FLTK 1.4.0 and/or later.
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static int lx = 0; // 0 for default: ld() = 0, i.e. ld() defaults (internally) to w()*d()
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// +1: ld() = (w() + DX) * d()
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// -1 to flip image vertically: ld() = - ((w() + DX) * d())
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static int flip_h = 0; // 1 = Flip image horizontally (only if IMG == 0)
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// 0 = Draw image normal, w/o horizontal flipping
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// ----------------------------------------------------------------------
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// Test scenario for fl_draw_image() with pos. and neg. d and ld args:
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// ----------------------------------------------------------------------
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// (1) set img = 0: normal, but w/o transparency: no checker board
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// (2) set lx = -1: images flipped vertically
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// (3) set flip_h = 1: images flipped vertically and horizontally
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// (4) set lx = 0: images flipped horizontally
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// (5) set flip_h = 0, IMG = 1: back to default (with transparency)
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// ----------------------------------------------------------------------
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class Ut_Image_Test : public Fl_Group {
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static void build_imgs() {
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int x, y;
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uchar *dg, *dga, *drgb, *drgba;
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dg = img_gray = img_gray_base = (uchar*)malloc((128+dx)*128*1);
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dga = img_gray_a = img_gray_a_base = (uchar*)malloc((128+dx)*128*2);
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drgb = img_rgb = img_rgb_base = (uchar*)malloc((128+dx)*128*3);
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drgba = img_rgba = img_rgba_base = (uchar*)malloc((128+dx)*128*4);
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for (y=0; y<128; y++) {
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for (x=0; x<128; x++) {
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*drgba++ = *drgb++ = *dga++ = *dg++ = y<<1;
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*drgba++ = *drgb++ = x<<1;
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*drgba++ = *drgb++ = (127-x)<<1;
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*drgba++ = *dga++ = x+y;
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}
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if (dx > 0 && lx != 0) {
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memset(dg, 0,1*dx); dg += 1*dx;
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memset(dga, 0,2*dx); dga += 2*dx;
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memset(drgb, 0,3*dx); drgb += 3*dx;
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memset(drgba,0,4*dx); drgba += 4*dx;
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}
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}
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if (lx<0) {
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img_gray += 127*(128+dx);
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img_gray_a += 127*(128+dx)*2;
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img_rgb += 127*(128+dx)*3;
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img_rgba += 127*(128+dx)*4;
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}
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if (flip_h && !img ) {
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img_gray += 127;
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img_gray_a += 127*2;
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img_rgb += 127*3;
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img_rgba += 127*4;
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}
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i_g = new Fl_RGB_Image (img_gray ,128,128,1,lx*(128+dx));
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i_ga = new Fl_RGB_Image (img_gray_a,128,128,2,lx*(128+dx)*2);
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i_rgb = new Fl_RGB_Image (img_rgb, 128,128,3,lx*(128+dx)*3);
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i_rgba = new Fl_RGB_Image (img_rgba, 128,128,4,lx*(128+dx)*4);
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} // build_imgs method ends
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void free_images() {
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if (i_rgba) { delete i_rgba; i_rgba = 0; }
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if (i_rgb) { delete i_rgb; i_rgb = 0; }
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if (i_ga) { delete i_ga; i_ga = 0; }
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if (i_g) { delete i_g; i_g = 0; }
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if (img_rgba_base) { free (img_rgba_base); img_rgba_base = 0; }
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if (img_rgb_base) { free (img_rgb_base); img_rgb_base = 0; }
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if (img_gray_a_base) { free (img_gray_a_base); img_gray_a_base = 0; }
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if (img_gray_base) { free (img_gray_base); img_gray_base = 0; }
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} // end of free_images method
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static void refresh_imgs_CB(Fl_Widget*,void *data) {
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Ut_Image_Test* it = (Ut_Image_Test*)data;
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it->free_images(); // release the previous images
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// determine the state for the next images
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cb = it->ck_CB->value();
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img = it->ck_IMG->value();
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flip_h = it->ck_FLIPH->value();
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// read the LX state radio buttons
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if (it->rb_LXp1->value()) { lx = 1; }
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else if (it->rb_LXm1->value()) { lx = (-1); }
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else { lx = 0; }
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// construct the next images
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build_imgs();
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it->redraw();
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}
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public:
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static Fl_Widget *create() {
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build_imgs();
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return new Ut_Image_Test(UT_TESTAREA_X, UT_TESTAREA_Y, UT_TESTAREA_W, UT_TESTAREA_H);
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} // create method ends
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static uchar *img_gray_base;
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static uchar *img_gray_a_base;
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static uchar *img_rgb_base;
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static uchar *img_rgba_base;
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static uchar *img_gray;
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static uchar *img_gray_a;
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static uchar *img_rgb;
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static uchar *img_rgba;
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static Fl_RGB_Image *i_g;
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static Fl_RGB_Image *i_ga;
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static Fl_RGB_Image *i_rgb;
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static Fl_RGB_Image *i_rgba;
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// control widgets
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Fl_Group *ctr_grp;
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Fl_Check_Button *ck_CB;
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Fl_Check_Button *ck_IMG;
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Fl_Check_Button *ck_FLIPH;
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Fl_Radio_Button *rb_LXm1;
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Fl_Radio_Button *rb_LX0;
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Fl_Radio_Button *rb_LXp1;
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Fl_Button *refresh;
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Ut_Image_Test(int x, int y, int w, int h)
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: Fl_Group(x, y, w, h)
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{
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label("Testing Image Drawing\n\n"
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"This test renders four images, two of them with a checker board\n"
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"visible through the graphics. Color and gray gradients should be\n"
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"visible. This does not test any image formats such as JPEG.");
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align(FL_ALIGN_INSIDE|FL_ALIGN_BOTTOM|FL_ALIGN_LEFT|FL_ALIGN_WRAP);
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box(FL_BORDER_BOX);
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int cw = 90;
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int ch = 200;
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int cx = x + w - cw - 5;
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int cy = y + 10;
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ctr_grp = new Fl_Group(cx, cy, cw, ch);
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ck_CB = new Fl_Check_Button(cx+10, cy+10, cw-20, 30, "CB");
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ck_CB->callback(refresh_imgs_CB, (void*)this);
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ck_CB->value(cb);
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ck_CB->tooltip("1 to show the checker board background for alpha images,\n"
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"0 otherwise");
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ck_IMG = new Fl_Check_Button(cx+10, cy+40, cw-20, 30, "IMG");
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ck_IMG->callback(refresh_imgs_CB, (void*)this);
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ck_IMG->value(img);
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ck_IMG->tooltip("1 to use Fl_RGB_Image for drawing images with transparency,\n"
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"0 to use fl_draw_image() instead.");
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ck_FLIPH = new Fl_Check_Button(cx+10, cy+70, cw-20, 30, "FLIPH");
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ck_FLIPH->callback(refresh_imgs_CB, (void*)this);
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ck_FLIPH->value(flip_h);
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ck_FLIPH->tooltip("1 = Flip image horizontally (only if IMG == 0)\n"
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"0 = Draw image normal, w/o horizontal flipping");
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Fl_Group *rd_grp = new Fl_Group(cx+10, cy+100, cw-20, 90, "LX");
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rb_LXp1 = new Fl_Radio_Button(cx+15, cy+105, cw-30, 20, "+1");
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rb_LXp1->callback(refresh_imgs_CB, (void*)this);
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rb_LX0 = new Fl_Radio_Button(cx+15, cy+125, cw-30, 20, "0");
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rb_LX0->callback(refresh_imgs_CB, (void*)this);
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rb_LX0->tooltip("0 for default: ld() = 0, i.e. ld() defaults (internally) to w()*d()\n"
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"+1: ld() = (w() + DX) * d()\n"
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"-1 to flip image vertically: ld() = - ((w() + DX) * d())");
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rb_LXm1 = new Fl_Radio_Button(cx+15, cy+145, cw-30, 20, "-1");
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rb_LXm1->callback(refresh_imgs_CB, (void*)this);
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rb_LX0->value(1);
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rd_grp->box(FL_BORDER_BOX);
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rd_grp->align(FL_ALIGN_INSIDE|FL_ALIGN_BOTTOM|FL_ALIGN_CENTER);
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rd_grp->end();
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ctr_grp->box(FL_BORDER_BOX);
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ctr_grp->end();
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end(); // make sure this ImageTest group is closed
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} // constructor ends
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void draw() {
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Fl_Group::draw();
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// top left: RGB
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int xx = x()+10, yy = y()+10;
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fl_color(FL_BLACK); fl_rect(xx, yy, 130, 130);
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if (img) {
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i_rgb->draw(xx+1,yy+1);
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}
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else {
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if (!flip_h) {
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fl_draw_image(img_rgb, xx+1, yy+1, 128, 128, 3, lx*((128+dx)*3));
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}
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else {
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fl_draw_image(img_rgb, xx+1, yy+1, 128, 128,-3, lx*((128+dx)*3));
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}
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}
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fl_draw("RGB", xx+134, yy+64);
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// bottom left: RGBA
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xx = x()+10; yy = y()+10+134;
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fl_color(FL_BLACK); fl_rect(xx, yy, 130, 130); // black frame
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fl_color(FL_WHITE); fl_rectf(xx+1, yy+1, 128, 128); // white background
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if (cb) { // checker board
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fl_color(FL_BLACK); fl_rectf(xx+65, yy+1, 64, 64);
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fl_color(FL_BLACK); fl_rectf(xx+1, yy+65, 64, 64);
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}
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if (img) {
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i_rgba->draw(xx+1,yy+1);
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}
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else {
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if (!flip_h) {
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fl_draw_image(img_rgba, xx+1, yy+1, 128, 128, 4, lx*((128+dx)*4));
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}
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else {
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fl_draw_image(img_rgba, xx+1, yy+1, 128, 128,-4, lx*((128+dx)*4));
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}
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}
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fl_color(FL_BLACK); fl_draw("RGBA", xx+134, yy+64);
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// top right: Gray
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xx = x()+10+200; yy = y()+10;
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fl_color(FL_BLACK); fl_rect(xx, yy, 130, 130);
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if (img) {
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i_g->draw(xx+1,yy+1);
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}
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else {
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if (!flip_h) {
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fl_draw_image(img_gray, xx+1, yy+1, 128, 128, 1, lx*((128+dx)*1));
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}
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else {
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fl_draw_image(img_gray, xx+1, yy+1, 128, 128,-1, lx*((128+dx)*1));
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}
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}
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fl_draw("Gray", xx+134, yy+64);
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// bottom right: Gray+Alpha
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xx = x()+10+200; yy = y()+10+134;
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fl_color(FL_BLACK); fl_rect(xx, yy, 130, 130); // black frame
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fl_color(FL_WHITE); fl_rectf(xx+1, yy+1, 128, 128); // white background
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if (cb) { // checker board
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fl_color(FL_BLACK); fl_rectf(xx+65, yy+1, 64, 64);
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fl_color(FL_BLACK); fl_rectf(xx+1, yy+65, 64, 64);
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}
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if (img) {
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i_ga->draw(xx+1,yy+1);
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}
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else {
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if (!flip_h) {
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fl_draw_image(img_gray_a, xx+1, yy+1, 128, 128, 2, lx*((128+dx)*2));
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}
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else {
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fl_draw_image(img_gray_a, xx+1, yy+1, 128, 128,-2, lx*((128+dx)*2));
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}
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}
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fl_color(FL_BLACK); fl_draw("Gray+Alpha", xx+134, yy+64);
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} // draw method end
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};
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uchar *Ut_Image_Test::img_gray_base = 0;
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uchar *Ut_Image_Test::img_gray_a_base = 0;
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uchar *Ut_Image_Test::img_rgb_base = 0;
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uchar *Ut_Image_Test::img_rgba_base = 0;
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uchar *Ut_Image_Test::img_gray = 0;
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uchar *Ut_Image_Test::img_gray_a = 0;
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uchar *Ut_Image_Test::img_rgb = 0;
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uchar *Ut_Image_Test::img_rgba = 0;
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Fl_RGB_Image *Ut_Image_Test::i_g = 0;
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Fl_RGB_Image *Ut_Image_Test::i_ga = 0;
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Fl_RGB_Image *Ut_Image_Test::i_rgb = 0;
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Fl_RGB_Image *Ut_Image_Test::i_rgba = 0;
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UnitTest images(UT_TEST_IMAGES, "Drawing Images", Ut_Image_Test::create);
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