mirror of https://github.com/fltk/fltk
169 lines
5.5 KiB
C++
169 lines
5.5 KiB
C++
//
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// "$Id$"
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//
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// Unit tests for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2011 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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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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#include <FL/Fl_Box.H>
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#include <FL/fl_draw.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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// Some parameters for fine tuning for developers - their
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// default values ought to be: CB=1, DX=0, LX=0, IMG=1
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#define CB (1) // 1 to show the checker board background for alpha images, 0 otherwise
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#define 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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#define 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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#define IMG (1) // 1 to use Fl_RGB_Image for drawing images,
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// 0 to use fl_draw_image() instead.
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// Note: as of April 2011, only 1 (Fl_RGB_Image) works correctly with alpha
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// channel, 0 (fl_draw_image()) ignores the alpha channel (FLTK 1.3.0).
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// There are plans to support alpha in fl_draw_image() in FLTK 1.3.x,
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// but not in FLTK 1.1.x .
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class ImageTest : public Fl_Box {
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public:
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static Fl_Widget *create() {
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int x, y;
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uchar *dg, *dga, *drgb, *drgba;
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dg = img_gray = (uchar*)malloc((128+DX)*128*1);
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dga = img_gray_a = (uchar*)malloc((128+DX)*128*2);
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drgb = img_rgb = (uchar*)malloc((128+DX)*128*3);
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drgba = img_rgba = (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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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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return new ImageTest(TESTAREA_X, TESTAREA_Y, TESTAREA_W, TESTAREA_H);
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}
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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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ImageTest(int x, int y, int w, int h) : Fl_Box(x, y, w, h) {
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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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}
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void draw() {
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Fl_Box::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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#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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#endif
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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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#endif
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#if IMG
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i_rgba->draw(xx+1,yy+1);
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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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#endif
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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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#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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#endif
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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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#endif
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#if IMG
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i_ga->draw(xx+1,yy+1);
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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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#endif
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fl_color(FL_BLACK); fl_draw("Gray+Alpha", xx+134, yy+64);
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}
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};
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uchar *ImageTest::img_gray = 0;
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uchar *ImageTest::img_gray_a = 0;
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uchar *ImageTest::img_rgb = 0;
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uchar *ImageTest::img_rgba = 0;
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Fl_RGB_Image *ImageTest::i_g = 0;
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Fl_RGB_Image *ImageTest::i_ga = 0;
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Fl_RGB_Image *ImageTest::i_rgb = 0;
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Fl_RGB_Image *ImageTest::i_rgba = 0;
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UnitTest images("drawing images", ImageTest::create);
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//
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// End of "$Id$"
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//
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