annotate test/dw_images_scaled.cc @ 2012:bfb8bc9ddf62

Avoid lots of flicker while resizing the window (when "buffered_drawing" is set to 0 or 1)
author Jorge Arellano Cid <jcid@dillo.org>
date Fri, 13 May 2011 14:14:43 -0400
parents 553e63661ec1
children 8cf59505bd0a
rev   line source
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1 /*
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2 * Dillo Widget
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3 *
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4 * Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
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5 *
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6 * This program is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 3 of the License, or
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9 * (at your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 */
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19
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20
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21
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22 #include <FL/Fl.H>
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23 #include <FL/Fl_Window.H>
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24
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25 #include "../dw/core.hh"
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26 #include "../dw/fltkcore.hh"
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27 #include "../dw/fltkviewport.hh"
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28 #include "../dw/textblock.hh"
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29 #include "../dw/image.hh"
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30
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31 using namespace dw;
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32 using namespace dw::core;
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33 using namespace dw::core::style;
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34 using namespace dw::fltk;
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35
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36 static Layout *layout;
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37 static Image *image;
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38 static core::Imgbuf *imgbuf = NULL;
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39 static int imgRow = 0;
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40
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41 static void imageInitTimeout (void *data)
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42 {
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43 //imgbuf = layout->createImgbuf (Imgbuf::RGBA, 400, 200);
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44 imgbuf = layout->createImgbuf (Imgbuf::RGB, 400, 200);
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45 image->setBuffer (imgbuf);
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46 }
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47
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48 /*
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49 static void imageDrawTimeout (void *data)
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50 {
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51 if (imgbuf) {
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52 for (int i = 0; i < 1; i++) {
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53 byte buf[4 * 400];
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54 for(int x = 0; x < 400; x++) {
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55 buf[4 * x + 0] = x * 255 / 399;
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56 buf[4 * x + 1] = (399 - x) * 255 / 399;
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57 buf[4 * x + 2] = imgRow * 255 / 199;
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58 buf[4 * x + 3] = (199 - imgRow) * 255 / 199;
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59 }
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60
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61 imgbuf->copyRow (imgRow, buf);
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62 image->drawRow (imgRow);
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63 imgRow++;
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64 }
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65 }
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66
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67 if(imgRow < 200)
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68 ::fltk::repeat_timeout (0.5, imageDrawTimeout, NULL);
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69 }
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70 */
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71
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72 static void imageDrawTimeout (void *data)
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73 {
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74 if (imgbuf) {
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75 for (int i = 0; i < 1; i++) {
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76 byte buf[3 * 400];
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77 for(int x = 0; x < 400; x++) {
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78 buf[3 * x + 0] = x * 255 / 399;
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79 buf[3 * x + 1] = (399 - x) * 255 / 399;
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80 buf[3 * x + 2] = imgRow * 255 / 199;
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81 }
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82
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83 imgbuf->copyRow (imgRow, buf);
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84 image->drawRow (imgRow);
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85 imgRow++;
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86 }
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87 }
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88
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89 if(imgRow < 200)
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90 Fl::repeat_timeout (0.5, imageDrawTimeout, NULL);
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91 }
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92
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93 int main(int argc, char **argv)
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94 {
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95 FltkPlatform *platform = new FltkPlatform ();
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96 layout = new Layout (platform);
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97
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98 Fl_Window *window = new Fl_Window(410, 210, "Dw Scaled Image");
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99 window->box(FL_NO_BOX);
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100 window->begin();
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101
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102 FltkViewport *viewport = new FltkViewport (0, 0, 410, 210);
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103 layout->attachView (viewport);
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104
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105 StyleAttrs styleAttrs;
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106 styleAttrs.initValues ();
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107 styleAttrs.margin.setVal (5);
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108 styleAttrs.width = createPerLength (1.0);
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109 styleAttrs.height = createPerLength (1.0);
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110
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111 FontAttrs fontAttrs;
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112 fontAttrs.name = "Bitstream Charter";
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113 fontAttrs.size = 14;
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114 fontAttrs.weight = 400;
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115 fontAttrs.style = FONT_STYLE_NORMAL;
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116 fontAttrs.letterSpacing = 0;
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117 styleAttrs.font = dw::core::style::Font::create (layout, &fontAttrs);
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118
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119 styleAttrs.color = Color::create (layout, 0x000000);
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120 styleAttrs.backgroundColor = Color::create (layout, 0xffffff);
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121
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122 Style *widgetStyle = Style::create (layout, &styleAttrs);
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123
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124 Textblock *textblock = new Textblock (false);
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125 textblock->setStyle (widgetStyle);
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126 layout->setWidget (textblock);
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127
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128 widgetStyle->unref();
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129
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130 styleAttrs.margin.setVal (0);
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131 styleAttrs.backgroundColor = NULL;
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132
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133 Style *imageStyle = Style::create (layout, &styleAttrs);
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134
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135 image = new dw::Image ("");
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136 textblock->addWidget (image, imageStyle);
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137 textblock->addSpace (imageStyle);
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138
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139 imageStyle->unref();
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140
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141 textblock->flush ();
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142
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143 window->resizable(viewport);
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144 window->show();
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145
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146 Fl::add_timeout (2.0, imageInitTimeout, NULL);
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147 Fl::add_timeout (0.1, imageDrawTimeout, NULL);
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148
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149 int errorCode = Fl::run();
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150
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151 delete layout;
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152
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153 return errorCode;
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154 }