// // Unit tests for the Fast Light Tool Kit (FLTK). // // Copyright 1998-2022 by Bill Spitzak and others. // // This library is free software. Distribution and use rights are outlined in // the file "COPYING" which should have been included with this file. If this // file is missing or damaged, see the license at: // // https://www.fltk.org/COPYING.php // // Please see the following page on how to report bugs and issues: // // https://www.fltk.org/bugs.php // #include "unittests.h" #include #include #include #include #include #include // Note: currently (March 2010) fl_draw_image() supports transparency with // alpha channel only on Apple (Mac OS X), but Fl_RGB_Image->draw() // supports transparency on all platforms ! // //------- test the image drawing capabilities of this implementation ---------- // // Parameters for fine tuning for developers. // Default values: CB=1, DX=0, IMG=1, LX=0, FLIPH=0 static int CB = 1; // 1 to show the checker board background for alpha images, // 0 otherwise static int DX = 0; // additional (undefined (0)) pixels per line, must be >= 0 // ignored (irrelevant), if LX == 0 (see below) static int IMG = 1; // 1 to use Fl_RGB_Image for drawing images with transparency, // 0 to use fl_draw_image() instead. // Note: as of Feb 2016, only 1 (Fl_RGB_Image) works with // alpha channel, 0 (fl_draw_image()) ignores the alpha // channel (FLTK 1.3.x). // There are plans to support transparency (alpha channel) // in fl_draw_image() in FLTK 1.4.0 and/or later. static int LX = 0; // 0 for default: ld() = 0, i.e. ld() defaults (internally) to w()*d() // +1: ld() = (w() + DX) * d() // -1 to flip image vertically: ld() = - ((w() + DX) * d()) static int FLIPH = 0; // 1 = Flip image horizontally (only if IMG == 0) // 0 = Draw image normal, w/o horizontal flipping // ---------------------------------------------------------------------- // Test scenario for fl_draw_image() with pos. and neg. d and ld args: // ---------------------------------------------------------------------- // (1) set IMG = 0: normal, but w/o transparency: no checker board // (2) set LX = -1: images flipped vertically // (3) set FLIPH = 1: images flipped vertically and horizontally // (4) set LX = 0: images flipped horizontally // (5) set FLIPH = 0, IMG = 1: back to default (with transparency) // ---------------------------------------------------------------------- class ImageTest : public Fl_Group { static void build_imgs() { int x, y; uchar *dg, *dga, *drgb, *drgba; dg = img_gray = img_gray_base = (uchar*)malloc((128+DX)*128*1); dga = img_gray_a = img_gray_a_base = (uchar*)malloc((128+DX)*128*2); drgb = img_rgb = img_rgb_base = (uchar*)malloc((128+DX)*128*3); drgba = img_rgba = img_rgba_base = (uchar*)malloc((128+DX)*128*4); for (y=0; y<128; y++) { for (x=0; x<128; x++) { *drgba++ = *drgb++ = *dga++ = *dg++ = y<<1; *drgba++ = *drgb++ = x<<1; *drgba++ = *drgb++ = (127-x)<<1; *drgba++ = *dga++ = x+y; } if (DX > 0 && LX != 0) { memset(dg, 0,1*DX); dg += 1*DX; memset(dga, 0,2*DX); dga += 2*DX; memset(drgb, 0,3*DX); drgb += 3*DX; memset(drgba,0,4*DX); drgba += 4*DX; } } if (LX<0) { img_gray += 127*(128+DX); img_gray_a += 127*(128+DX)*2; img_rgb += 127*(128+DX)*3; img_rgba += 127*(128+DX)*4; } if (FLIPH && !IMG ) { img_gray += 127; img_gray_a += 127*2; img_rgb += 127*3; img_rgba += 127*4; } i_g = new Fl_RGB_Image (img_gray ,128,128,1,LX*(128+DX)); i_ga = new Fl_RGB_Image (img_gray_a,128,128,2,LX*(128+DX)*2); i_rgb = new Fl_RGB_Image (img_rgb, 128,128,3,LX*(128+DX)*3); i_rgba = new Fl_RGB_Image (img_rgba, 128,128,4,LX*(128+DX)*4); } // build_imgs method ends void free_images() { if (i_rgba) { delete i_rgba; i_rgba = 0; } if (i_rgb) { delete i_rgb; i_rgb = 0; } if (i_ga) { delete i_ga; i_ga = 0; } if (i_g) { delete i_g; i_g = 0; } if (img_rgba_base) { free (img_rgba_base); img_rgba_base = 0; } if (img_rgb_base) { free (img_rgb_base); img_rgb_base = 0; } if (img_gray_a_base) { free (img_gray_a_base); img_gray_a_base = 0; } if (img_gray_base) { free (img_gray_base); img_gray_base = 0; } } // end of free_images method static void refresh_imgs_CB(Fl_Widget*,void *data) { ImageTest *it = (ImageTest*)data; it->free_images(); // release the previous images // determine the state for the next images CB = it->ck_CB->value(); IMG = it->ck_IMG->value(); FLIPH = it->ck_FLIPH->value(); // read the LX state radio buttons if (it->rb_LXp1->value()) { LX = 1; } else if (it->rb_LXm1->value()) { LX = (-1); } else { LX = 0; } // construct the next images build_imgs(); it->redraw(); } public: static Fl_Widget *create() { build_imgs(); return new ImageTest(TESTAREA_X, TESTAREA_Y, TESTAREA_W, TESTAREA_H); } // create method ends static uchar *img_gray_base; static uchar *img_gray_a_base; static uchar *img_rgb_base; static uchar *img_rgba_base; static uchar *img_gray; static uchar *img_gray_a; static uchar *img_rgb; static uchar *img_rgba; static Fl_RGB_Image *i_g; static Fl_RGB_Image *i_ga; static Fl_RGB_Image *i_rgb; static Fl_RGB_Image *i_rgba; // control widgets Fl_Group *ctr_grp; Fl_Check_Button *ck_CB; Fl_Check_Button *ck_IMG; Fl_Check_Button *ck_FLIPH; Fl_Radio_Button *rb_LXm1; Fl_Radio_Button *rb_LX0; Fl_Radio_Button *rb_LXp1; Fl_Button *refresh; ImageTest(int x, int y, int w, int h) : Fl_Group(x, y, w, h) { label("Testing Image Drawing\n\n" "This test renders four images, two of them with a checker board\n" "visible through the graphics. Color and gray gradients should be\n" "visible. This does not test any image formats such as JPEG."); align(FL_ALIGN_INSIDE|FL_ALIGN_BOTTOM|FL_ALIGN_LEFT|FL_ALIGN_WRAP); box(FL_BORDER_BOX); int cw = 90; int ch = 270; int cx = x + w - cw - 5; int cy = y + 10; ctr_grp = new Fl_Group(cx, cy, cw, ch); ck_CB = new Fl_Check_Button(cx+10, cy+10, cw-20, 30, "CB"); ck_CB->value(CB); ck_IMG = new Fl_Check_Button(cx+10, cy+40, cw-20, 30, "IMG"); ck_IMG->value(IMG); ck_FLIPH = new Fl_Check_Button(cx+10, cy+70, cw-20, 30, "FLIPH"); ck_FLIPH->value(FLIPH); Fl_Group *rd_grp = new Fl_Group(cx+10, cy+100, cw-20, 90, "LX"); rb_LXp1 = new Fl_Radio_Button(cx+15, cy+105, cw-30, 20, "+1"); rb_LX0 = new Fl_Radio_Button(cx+15, cy+125, cw-30, 20, "0"); rb_LXm1 = new Fl_Radio_Button(cx+15, cy+145, cw-30, 20, "-1"); rb_LX0->value(1); rd_grp->box(FL_BORDER_BOX); rd_grp->align(FL_ALIGN_INSIDE|FL_ALIGN_BOTTOM|FL_ALIGN_CENTER); rd_grp->end(); refresh = new Fl_Button(cx+10, cy+ch-40, cw-20, 30, "Refresh"); refresh->callback(refresh_imgs_CB, (void*)this); ctr_grp->box(FL_BORDER_BOX); ctr_grp->end(); end(); // make sure this ImageTest group is closed } // constructor ends void draw() { Fl_Group::draw(); // top left: RGB int xx = x()+10, yy = y()+10; fl_color(FL_BLACK); fl_rect(xx, yy, 130, 130); if (IMG) { i_rgb->draw(xx+1,yy+1); } else { if (!FLIPH) { fl_draw_image(img_rgb, xx+1, yy+1, 128, 128, 3, LX*((128+DX)*3)); } else { fl_draw_image(img_rgb, xx+1, yy+1, 128, 128,-3, LX*((128+DX)*3)); } } fl_draw("RGB", xx+134, yy+64); // bottom left: RGBA xx = x()+10; yy = y()+10+134; fl_color(FL_BLACK); fl_rect(xx, yy, 130, 130); // black frame fl_color(FL_WHITE); fl_rectf(xx+1, yy+1, 128, 128); // white background if (CB) { // checker board fl_color(FL_BLACK); fl_rectf(xx+65, yy+1, 64, 64); fl_color(FL_BLACK); fl_rectf(xx+1, yy+65, 64, 64); } if (IMG) { i_rgba->draw(xx+1,yy+1); } else { if (!FLIPH) { fl_draw_image(img_rgba, xx+1, yy+1, 128, 128, 4, LX*((128+DX)*4)); } else { fl_draw_image(img_rgba, xx+1, yy+1, 128, 128,-4, LX*((128+DX)*4)); } } fl_color(FL_BLACK); fl_draw("RGBA", xx+134, yy+64); // top right: Gray xx = x()+10+200; yy = y()+10; fl_color(FL_BLACK); fl_rect(xx, yy, 130, 130); if (IMG) { i_g->draw(xx+1,yy+1); } else { if (!FLIPH) { fl_draw_image(img_gray, xx+1, yy+1, 128, 128, 1, LX*((128+DX)*1)); } else { fl_draw_image(img_gray, xx+1, yy+1, 128, 128,-1, LX*((128+DX)*1)); } } fl_draw("Gray", xx+134, yy+64); // bottom right: Gray+Alpha xx = x()+10+200; yy = y()+10+134; fl_color(FL_BLACK); fl_rect(xx, yy, 130, 130); // black frame fl_color(FL_WHITE); fl_rectf(xx+1, yy+1, 128, 128); // white background if (CB) { // checker board fl_color(FL_BLACK); fl_rectf(xx+65, yy+1, 64, 64); fl_color(FL_BLACK); fl_rectf(xx+1, yy+65, 64, 64); } if (IMG) { i_ga->draw(xx+1,yy+1); } else { if (!FLIPH) { fl_draw_image(img_gray_a, xx+1, yy+1, 128, 128, 2, LX*((128+DX)*2)); } else { fl_draw_image(img_gray_a, xx+1, yy+1, 128, 128,-2, LX*((128+DX)*2)); } } fl_color(FL_BLACK); fl_draw("Gray+Alpha", xx+134, yy+64); } // draw method end }; uchar *ImageTest::img_gray_base = 0; uchar *ImageTest::img_gray_a_base = 0; uchar *ImageTest::img_rgb_base = 0; uchar *ImageTest::img_rgba_base = 0; uchar *ImageTest::img_gray = 0; uchar *ImageTest::img_gray_a = 0; uchar *ImageTest::img_rgb = 0; uchar *ImageTest::img_rgba = 0; Fl_RGB_Image *ImageTest::i_g = 0; Fl_RGB_Image *ImageTest::i_ga = 0; Fl_RGB_Image *ImageTest::i_rgb = 0; Fl_RGB_Image *ImageTest::i_rgba = 0; UnitTest images(kTestImages, "Drawing Images", ImageTest::create);