1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
program fpgcanvas;
{$mode objfpc}{$H+}
uses
{$IFDEF UNIX}{$IFDEF UseCThreads}
cthreads,
{$ENDIF}{$ENDIF}
Classes, SysUtils,
fpgfx,
gfxbase,
gui_form,
gfx_imgfmt_bmp;
type
{ TMainForm }
TMainForm = class(TfpgForm)
private
bmp: TfpgImage;
dst: TfpgImage;
protected
procedure HandlePaint; override;
public
procedure AfterCreate; override;
procedure BeforeDestruction; override;
end;
{ TMainForm }
procedure TMainForm.HandlePaint;
var
r: TfpgRect;
fnt: TfpgFont;
y: integer;
c: TfpgColor;
begin
// Enable double buffering. Must be before 'inherited' to prevent form
// clearing itself.
Canvas.BeginDraw;
inherited HandlePaint;
// Testing Rectangles
Canvas.SetColor(clBlack);
r.SetRect(0, 0, 1, 1);
Canvas.DrawRectangle(r);
Canvas.SetColor(clBlack);
r.Top := 5;
r.Left := 60;
r.Width := 50;
r.Height := 50;
Canvas.DrawRectangle(r);
r.Left := 120;
Canvas.SetLineStyle(2, lsDash);
Canvas.DrawRectangle(r);
r.Left := 180;
Canvas.SetColor(clGreen);
Canvas.SetLineStyle(1, lsDot);
Canvas.DrawRectangle(r);
r.Left := 240;
Canvas.SetColor(clBlue);
Canvas.SetLineStyle(1, lsSolid);
Canvas.FillRectangle(r);
// Testing line drawing
Canvas.DrawLine(5, 5, 54, 54);
Canvas.SetColor(clBlue);
Canvas.DrawLine(54, 5, 5, 54);
Canvas.SetColor(clRed);
{ Diagonal line }
r.SetRect(60, 5, 50, 50);
Canvas.DrawLine(r.Left, r.Top, r.Right, r.Bottom);
{ Horizontal line }
Canvas.DrawLine(r.Left, r.Top-2, r.Right, r.Top-2);
{ Vertical line }
Canvas.DrawLine(r.Left-2, r.Top, r.Left-2, r.Bottom);
// Testing Text and Fonts
y := 60;
Canvas.SetTextColor(clBlack);
Canvas.DrawString(5, y, 'This text must be black and default font (' + fpgApplication.DefaultFont.FontDesc + ')');
Canvas.SetTextColor(clRed);
y := y + Canvas.Font.Height; // fonts are different sizes on differet OS's
Canvas.DrawString(5, y, 'This text must be red.');
Canvas.SetTextColor(clBlack);
y := y + Canvas.Font.Height;
Canvas.DrawString(5, y, 'Russian (UTF-8) text -> Òåñò');
y := y + Canvas.Font.Height;
fnt := fpgApplication.GetFont('Times-14:bold');
Canvas.Font := fnt;
Canvas.DrawString(5, y, 'Font used is ' + Canvas.Font.FontDesc);
y := y + Canvas.Font.Height;
// Testing basic style drawings
Canvas.Font := fpgApplication.DefaultFont;
Canvas.DrawString(320, 3, 'DrawButtonFace():');
r.SetRect(300, 20, 75, 25);
Canvas.DrawButtonFace(r, []);
Canvas.DrawString(385, 20, '= []');
r.Top := 50;
Canvas.DrawButtonFace(r, [btnIsDefault]);
Canvas.DrawString(385, 50, '= [btnIsDefault]');
r.Top := 80;
Canvas.DrawButtonFace(r, [btnIsPressed]);
Canvas.DrawString(385, 80, '= [btnIsPressed]');
r.Top := 110;
Canvas.DrawButtonFace(r, [btnIsEmbedded, btnIsPressed]);
Canvas.DrawString(385, 110, '= [embed & press]');
r.Top := 140;
Canvas.DrawButtonFace(r, [btnIsEmbedded]);
Canvas.DrawString(385, 140, '= [btnIsEmbedded]');
Canvas.DrawString(45, y, 'DrawControlFrame():');
y := y + Canvas.Font.Height;
Canvas.DrawControlFrame(5, y, 200, 23);
// Testing Bitmap painting
Canvas.DrawString(5, 180, 'Single BMP file:');
Canvas.DrawString(300, 210, '(mask enabled for all images)');
Canvas.DrawImage(150, 180, bmp);
Canvas.DrawString(5, 210, 'Parts of BMP file:');
Canvas.DrawImagePart(150, 210, bmp, 0, 0, 32, 21);
Canvas.DrawImagePart(190, 210, bmp, 32, 0, 32, 21);
Canvas.DrawImagePart(230, 210, bmp, 64, 0, 32, 21);
// Canvas.StretchDraw(150, 240, 160, 21, bmp);
Canvas.StretchDraw(150, 240, 300, 50, bmp);
Canvas.DrawImage(150, 300, dst);
Canvas.StretchDraw(180, 300, 70, 70, dst);
Canvas.StretchDraw(265, 300, 230, 25, bmp);
// testing accuracy of line/rectangle drawing
Canvas.SetColor(clBlack);
Canvas.SetLineStyle(1, lsSolid);
r.SetRect(182, 302, 66, 66);
Canvas.DrawRectangle(r);
Canvas.SetColor(clBlue);
Canvas.DrawLine(183, 303, 247, 303);
// Testing Canvas.Pixels[]
// two pixels should have changed color in the top left of the form
Canvas.Pixels[7,5] := clBlue; // This tests consistant bit order handling (RGB)
Canvas.Pixels[8,5] := clRed;
c := Canvas.Pixels[192, 227]; // should be orange like color
Canvas.Pixels[9,5] := c;
c := Canvas.Pixels[150 + (32*4) + 3, 199]; // should be lightblue like color
Canvas.Pixels[10,5] := c;
// Arc drawing tests
Canvas.SetColor(clBlack);
Canvas.DrawRectangle(5, 235, 50, 50);
Canvas.SetColor(clRed);
Canvas.DrawArc(5, 235, 50, 50, 0, 270); // should overlap rectangle pixels
Canvas.SetColor(clBlack);
Canvas.DrawRectangle(5, 290, 50, 50);
Canvas.SetColor(clRed);
Canvas.FillArc(5, 290, 50, 50, 0, 270); // should overlap rectangle pixels
// Gradient testing
r.SetRect(265, 340, 185, 35);
Canvas.GradientFill(r, clBlue, clMagenta, gdHorizontal);
Canvas.EndDraw;
end;
procedure TMainForm.AfterCreate;
begin
inherited AfterCreate;
SetPosition(100, 100, 500, 400);
WindowTitle := 'fpGFX Canvas Test';
bmp := LoadImage_BMP('button.bmp');
if not Assigned(bmp) then
raise Exception.Create('Failed to load button.bmp');
bmp.CreateMaskFromSample(0,0);
bmp.UpdateImage;
// dst := TfpgImage.Create;
// dst.AllocateImage(bmp.ColorDepth, 200, 50);
dst := LoadImage_BMP('gears2.bmp');
dst.CreateMaskFromSample(0,0);
dst.UpdateImage;
end;
procedure TMainForm.BeforeDestruction;
begin
dst.Free;
bmp.Free;
inherited BeforeDestruction;
end;
procedure MainProc;
var
frm: TMainForm;
begin
fpgApplication.Initialize;
frm := TMainForm.Create(nil);
frm.Show;
fpgApplication.Run;
end;
begin
MainProc;
end.
|
