progs/openvg/trivial/lookup.c

   1 #include "eglcommon.h"
   2
   3 #include <VG/openvg.h>
   4
   5 #include <math.h>
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8
   9 const VGfloat white_color[4] = {1.0, 1.0, 1.0, 1.0};
  10 const VGfloat color[4] = {1.0, 1.0, 1.0, 0.5};
  11 VGfloat clearColor[] = {1.0f, 0.0f, 0.0f, 1.0f};/* red color */
  12 VGImage parent;
  13
  14 VGPaint fill;
  15
  16 static void
  17 init(void)
  18 {
  19     VGImage child1, child2;
  20     VGubyte *data;
  21     VGuint  LUT[256];
  22     VGint i;
  23
  24     data = (VGubyte *)malloc(sizeof(VGubyte)*window_width()*window_height());
  25
  26     for (i=0;i<window_width()*window_height();i++) {
  27         data[i] = 0x00;
  28     }
  29
  30     for (i=0; i<256; i++) {
  31         if ( i == 0 )
  32             LUT[0] = 0xFFFFFFFF;
  33         else
  34             LUT[i] = 0xFF00FFFF;
  35     }
  36
  37     parent = vgCreateImage( VG_A_8, 64, 64, VG_IMAGE_QUALITY_NONANTIALIASED );
  38
  39     vgImageSubData(parent, data, window_width(), VG_A_8, 0, 0,
  40                    window_width(), window_height());
  41     child1 = vgChildImage(parent, 0, 0, 32, 64);
  42     child2 = vgChildImage(parent, 32, 0, 32, 64);
  43
  44     vgLookupSingle(child2, child1, LUT, VG_GREEN, VG_FALSE, VG_TRUE);
  45 }
  46
  47 /* new window size or exposure */
  48 static void
  49 reshape(int w, int h)
  50 {
  51 }
  52
  53 static void
  54 draw(void)
  55 {
  56    vgSetfv(VG_CLEAR_COLOR, 4, clearColor);
  57    vgClear(0, 0, window_width(), window_height());
  58    //vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);
  59    //vgLoadIdentity();
  60    //vgTranslate(10, 10);
  61    vgDrawImage(parent);
  62    vgFlush();
  63 }
  64
  65
  66 int main(int argc, char **argv)
  67 {
  68    set_window_size(64, 64);
  69    return run(argc, argv, init, reshape,
  70               draw, 0);
  71 }