progs/egl/openvg/trivial/stroke2.c

   1 #include "eglcommon.h"
   2
   3 #include <VG/openvg.h>
   4 #include <X11/keysym.h>
   5 #include <stdio.h>
   6
   7 VGPaint stroke;
   8 VGPath target;
   9 VGPath lines;
  10
  11 VGfloat xform[9];
  12 VGfloat color1[4];
  13 VGfloat color2[4];
  14 VGfloat bgCol[4];
  15
  16 static void
  17 init(void)
  18 {
  19     VGubyte lineCmds[6];
  20     VGfloat lineCoords[8];
  21     VGfloat arcCoords[5];
  22     VGubyte sccCmd[1];
  23     VGubyte scCmd[1];
  24     VGubyte lccCmd[1];
  25     VGubyte lcCmd[1];
  26     VGubyte moveCmd[1];
  27     VGfloat moveCoords[2];
  28     VGint i;
  29
  30     bgCol[0] = 1.0f;
  31     bgCol[1] = 1.0f;
  32     bgCol[2] = 1.0f;
  33     bgCol[3] = 1.0f;
  34
  35     vgSetfv(VG_CLEAR_COLOR, 4, bgCol);
  36     vgSeti(VG_RENDERING_QUALITY, VG_RENDERING_QUALITY_NONANTIALIASED);
  37
  38     stroke = vgCreatePaint();
  39     /* Red */
  40     color1[0] = 1.0f;
  41     color1[1] = 0.0f;
  42     color1[2] = 0.0f;
  43     color1[3] = 1.0f;
  44
  45     /* Orange */
  46     color2[0] = 1.0000f;
  47     color2[1] = 1.0f;
  48     color2[2] = 0.0f;
  49     color2[3] = 1.0f;
  50     vgSetPaint(stroke, VG_STROKE_PATH);
  51
  52     vgSeti(VG_STROKE_CAP_STYLE, VG_CAP_SQUARE);
  53
  54     {
  55         VGfloat temp[9] = {0, 0, 0, 0, 0, 0, 0, 0, 0};
  56         for (i = 0; i < 9; i++)
  57         {
  58             xform[i] = temp[i];
  59         }
  60     }
  61     vgGetMatrix(xform);
  62
  63     target = vgCreatePath(VG_PATH_FORMAT_STANDARD,
  64                           VG_PATH_DATATYPE_F, 1, 0, 0, 0, VG_PATH_CAPABILITY_TRANSFORM_TO);
  65
  66 #if 0
  67     /* Line path */
  68     {
  69         VGubyte temp[6] = {VG_MOVE_TO_ABS, VG_VLINE_TO_REL,
  70                            VG_MOVE_TO_ABS, VG_VLINE_TO_REL,
  71                            VG_HLINE_TO_REL, VG_VLINE_TO_REL};
  72         for (i = 0; i < 6; i++)
  73         {
  74             lineCmds[i] = temp[i];
  75         }
  76     }
  77     {
  78         VGfloat temp[8] = {0.5f, 0.8f, -0.6f, 0.28f, 0.6f, -0.4f, 0.44f, 0.4f};
  79         for (i = 0; i < 8; i++)
  80         {
  81             lineCoords[i] = temp[i] * window_width();
  82         }
  83     }
  84 #else
  85     {
  86         VGfloat temp[5] = {0.35f, 0.15f, 29, 0.3f, 0.4f};
  87         for (i = 0; i < 5; i++)
  88         {
  89             arcCoords[i] = temp[i] * window_width();
  90         }
  91         arcCoords[2] = 29;
  92     }
  93
  94     {
  95         VGubyte temp[1] = {VG_SCCWARC_TO_ABS};
  96         for (i = 0; i < 1; i++)
  97         {
  98             sccCmd[i] = temp[i];
  99         }
 100     }
 101     {
 102         VGubyte temp[1] = {VG_SCWARC_TO_ABS};
 103         for (i = 0; i < 1; i++)
 104         {
 105             scCmd[i] = temp[i];
 106         }
 107     }
 108     {
 109         VGubyte temp[1] = {VG_LCCWARC_TO_ABS};
 110         for (i = 0; i < 1; i++)
 111         {
 112             lccCmd[i] = temp[i];
 113         }
 114     }
 115     {
 116         VGubyte temp[1] = {VG_LCWARC_TO_ABS};
 117         for (i = 0; i < 1; i++)
 118         {
 119             lcCmd[i] = temp[i];
 120         }
 121     }
 122
 123     {
 124         VGubyte temp[1] = {VG_MOVE_TO_ABS};
 125         for (i = 0; i < 1; i++)
 126         {
 127             moveCmd[i] = temp[i];
 128         }
 129     }
 130     {
 131         VGfloat temp[2] = {0.7f, 0.6f};
 132         for (i = 0; i < 2; i++)
 133         {
 134             moveCoords[i] = temp[i] * window_width();
 135         }
 136     }
 137 #endif
 138
 139     lines = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F, 1,
 140                          0, 0, 0,
 141                          VG_PATH_CAPABILITY_APPEND_TO|
 142                          VG_PATH_CAPABILITY_TRANSFORM_FROM);
 143 #if 0
 144     vgAppendPathData(lines, 6, lineCmds, lineCoords);
 145 #else
 146     vgAppendPathData(lines, 1, moveCmd, moveCoords);
 147     vgAppendPathData(lines, 1, sccCmd, arcCoords);
 148     vgAppendPathData(lines, 1, moveCmd, moveCoords);
 149     vgAppendPathData(lines, 1, scCmd, arcCoords);
 150     vgAppendPathData(lines, 1, moveCmd, moveCoords);
 151     vgAppendPathData(lines, 1, lccCmd, arcCoords);
 152     vgAppendPathData(lines, 1, moveCmd, moveCoords);
 153     vgAppendPathData(lines, 1, lcCmd, arcCoords);
 154 #endif
 155
 156     vgLoadIdentity();
 157     vgTranslate(0.25f * window_width(), 0.25f * window_height());
 158     vgRotate(30);
 159     vgTranslate(-0.25f * window_width(), -0.25f * window_height());
 160     vgTransformPath(target, lines);}
 161
 162 /* new window size or exposure */
 163 static void
 164 reshape(int w, int h)
 165 {
 166 }
 167
 168 static void
 169 draw(void)
 170 {
 171     vgClear(0, 0, window_width(), window_height());
 172     vgLoadMatrix(xform);
 173     vgLoadIdentity();
 174     vgTranslate(0.25f * window_width(), 0.25f * window_height());
 175     vgRotate(30);
 176     vgTranslate(-0.25f * window_width(), -0.25f * window_height());
 177     vgSetf(VG_STROKE_LINE_WIDTH, 7);
 178     vgSetParameterfv(stroke, VG_PAINT_COLOR, 4, color1);
 179     vgDrawPath(lines, VG_STROKE_PATH);
 180
 181     vgLoadMatrix(xform);
 182     vgSetParameterfv(stroke, VG_PAINT_COLOR, 4, color2);
 183     vgSetf(VG_STROKE_LINE_WIDTH, 3);
 184     vgDrawPath(target, VG_STROKE_PATH);
 185 }
 186
 187 static int  key_press(unsigned key)
 188 {
 189     switch(key) {
 190     case XK_c:
 191     case XK_C:
 192         break;
 193     case XK_j:
 194     case XK_J:
 195         break;
 196     default:
 197         break;
 198     }
 199
 200     return VG_TRUE;
 201 }
 202
 203 int main(int argc, char **argv)
 204 {
 205    return run(argc, argv, init, reshape,
 206               draw, key_press);
 207 }