Pileus Git - ~andy/spades/blob - src/org/pileus/spades/Cards.java

   1 package org.pileus.spades;
   2
   3 import java.nio.ByteBuffer;
   4 import java.nio.ByteOrder;
   5 import java.nio.FloatBuffer;
   6
   7 import javax.microedition.khronos.egl.EGLConfig;
   8 import javax.microedition.khronos.opengles.GL10;
   9
  10 import android.content.Context;
  11 import android.content.res.Resources;
  12 import android.graphics.Bitmap;
  13 import android.graphics.BitmapFactory;
  14 import android.opengl.GLES20;
  15 import android.opengl.GLSurfaceView;
  16 import android.opengl.GLUtils;
  17
  18 public class Cards extends GLSurfaceView implements GLSurfaceView.Renderer
  19 {
  20         /* Shader data */
  21         private final String vertSource
  22                 = "attribute vec4 a_position;"
  23                 + "attribute vec2 a_mapping;"
  24                 + "varying   vec2 v_mapping;"
  25                 + "void main() {"
  26                 + "  gl_Position = a_position;"
  27                 + "  v_mapping   = a_mapping;"
  28                 + "}";
  29
  30         private final String fragSource
  31                 = "precision mediump   float;"
  32                 + "uniform   sampler2D u_texture;"
  33                 + "uniform   vec4      u_color;"
  34                 + "varying   vec2      v_mapping;"
  35                 + "void main() {"
  36                 + "  gl_FragColor = texture2D("
  37                 + "    u_texture, v_mapping);"
  38                 + "}";
  39
  40         /* Drawing data */
  41         private final float  vertCoords[] = {
  42                 -0.5f,  0.5f, 0.0f,
  43                 -0.5f, -0.5f, 0.0f,
  44                  0.5f, -0.5f, 0.0f,
  45                  0.5f,  0.5f, 0.0f,
  46         };
  47
  48         private final float  mapCoords[] = {
  49                 0.0f, 0.0f,
  50                 0.0f, 1.0f,
  51                 1.0f, 1.0f,
  52                 1.0f, 0.0f,
  53         };
  54
  55         private final float  color[] = {
  56                 1, 0, 0, 1
  57         };
  58
  59         /* Cards data */
  60         private final String cards[] = {
  61                 "As", "Ks", "Qs", "Js", "10s", "9s", "8s", "7s", "6s", "5s", "4s", "3s", "2s",
  62                 "Ah", "Kh", "Qh", "Jh", "10h", "9h", "8h", "7h", "6h", "5h", "4h", "3h", "2h",
  63                 "Ac", "Kc", "Qc", "Jc", "10c", "9c", "8c", "7c", "6c", "5c", "4c", "3c", "2c",
  64                 "Ad", "Kd", "Qd", "Jd", "10d", "9d", "8d", "7d", "6d", "5d", "4d", "3d", "2d",
  65         };
  66
  67         /* Private data */
  68         private Resources    res;         // app resources
  69         private int          program;     // opengl program
  70
  71         private FloatBuffer  vertBuf;     // vertex position buffer
  72         private FloatBuffer  mapBuf;      // texture mapping coord buffer
  73
  74         private int          vertHandle;  // vertex positions
  75         private int          mapHandle;   // texture mapping coords
  76         private int          texHandle;   // texture data
  77         private int          colorHandle; // color data
  78
  79         private int          face[];      // card face textures
  80         private int          red;         // red card back
  81         private int          blue;        // blue card back
  82
  83         /* Private methods */
  84         private int loadShader(int type, String code)
  85         {
  86                 Os.debug("Cards: loadShader");
  87
  88                 int shader = GLES20.glCreateShader(type);
  89                 GLES20.glShaderSource(shader, code);
  90                 GLES20.glCompileShader(shader);
  91                 return shader;
  92         }
  93
  94         private int loadTexture(String name)
  95         {
  96                 Os.debug("Cards: loadTexture - " + name);
  97
  98                 final int[] tex = new int[1];
  99
 100                 /* Lookup the resource ID */
 101                 int id = 0;
 102                 try {
 103                         id = R.drawable.class.getField(name).getInt(null);
 104                 } catch(Exception e) {
 105                         Os.debug("Cards: lookup failed for '" + name + "'", e);
 106                         return 0;
 107                 }
 108
 109                 /* Load the bitmap */
 110                 Bitmap bitmap = BitmapFactory.decodeResource(this.res, id);
 111
 112                 /* Copy into OpenGL */
 113                 GLES20.glGenTextures(1, tex, 0);
 114                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, tex[0]);
 115                 GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0);
 116                 GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
 117                 GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
 118
 119                 return tex[0];
 120         }
 121
 122         private FloatBuffer loadBuffer(float[] data)
 123         {
 124                 ByteBuffer bytes = ByteBuffer.allocateDirect(data.length * 4);
 125                 bytes.order(ByteOrder.nativeOrder());
 126
 127                 FloatBuffer buf = bytes.asFloatBuffer();
 128                 buf.put(data);
 129                 buf.position(0);
 130
 131                 return buf;
 132         }
 133
 134         /* GLSurfaceView Methods */
 135         public Cards(Context context)
 136         {
 137                 super(context);
 138                 Os.debug("Cards: create");
 139
 140                 this.res = context.getResources();
 141
 142                 this.face  = new int[52];
 143
 144                 this.setEGLContextClientVersion(2);
 145                 this.setRenderer(this);
 146                 this.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
 147         }
 148
 149         /* Renderer methods */
 150         @Override
 151         public void onSurfaceCreated(GL10 unused, EGLConfig config)
 152         {
 153                 Os.debug("Cards: onSurfaceCreate");
 154
 155                 /* Initialize shaders */
 156                 int vertShader = this.loadShader(GLES20.GL_VERTEX_SHADER,   vertSource);
 157                 int fragShader = this.loadShader(GLES20.GL_FRAGMENT_SHADER, fragSource);
 158
 159                 /* Link shaders into an OpenGL program */
 160                 this.program = GLES20.glCreateProgram();
 161                 GLES20.glAttachShader(program, vertShader);
 162                 GLES20.glAttachShader(program, fragShader);
 163                 GLES20.glLinkProgram(program);
 164
 165                 /* Get shaders attributes */
 166                 this.vertHandle  = GLES20.glGetAttribLocation(program, "a_position");
 167                 this.mapHandle   = GLES20.glGetAttribLocation(program, "a_mapping");
 168                 this.texHandle   = GLES20.glGetUniformLocation(program, "u_texture");
 169                 this.colorHandle = GLES20.glGetUniformLocation(program, "u_color");
 170
 171                 /* Create vertex array  */
 172                 this.vertBuf = this.loadBuffer(this.vertCoords);
 173                 this.mapBuf  = this.loadBuffer(this.mapCoords);
 174
 175                 /* Load textures */
 176                 for (int i = 0; i < 52; i++) {
 177                         String name = "card_" + this.cards[i].toLowerCase();
 178                         this.face[i] = this.loadTexture(name);
 179                 }
 180                 this.red  = this.loadTexture("card_red");
 181                 this.blue = this.loadTexture("card_blue");
 182
 183                 /* Debug */
 184                 Os.debug("Cards: onSurfaceCreate");
 185         }
 186
 187         @Override
 188         public void onDrawFrame(GL10 unused)
 189         {
 190                 Os.debug("Cards: onDrawFrame");
 191
 192                 /* Turn on the program */
 193                 GLES20.glUseProgram(program);
 194
 195                 /* Draw */
 196                 GLES20.glClearColor(0, 0, 0, 1);
 197                 GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
 198
 199                 GLES20.glEnableVertexAttribArray(this.vertHandle);
 200                 GLES20.glEnableVertexAttribArray(this.mapHandle);
 201                 GLES20.glVertexAttribPointer(this.vertHandle,  3, GLES20.GL_FLOAT, false, 3*4, this.vertBuf);
 202                 GLES20.glVertexAttribPointer(this.mapHandle, 2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
 203
 204                 GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
 205                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, this.red);
 206                 GLES20.glUniform1i(this.texHandle, 0);
 207
 208                 GLES20.glUniform4fv(this.colorHandle, 1, this.color, 0);
 209
 210                 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
 211                 GLES20.glDisableVertexAttribArray(this.mapHandle);
 212         }
 213
 214         @Override
 215         public void onSurfaceChanged(GL10 unused, int width, int height)
 216         {
 217                 Os.debug("Cards: onSurfaceChanged");
 218
 219                 GLES20.glViewport(0, 0, width, height);
 220         }
 221 }