package org.pileus.spades;
-public class Cards
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+
+import javax.microedition.khronos.egl.EGLConfig;
+import javax.microedition.khronos.opengles.GL10;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.opengl.GLES20;
+import android.opengl.GLSurfaceView;
+import android.opengl.GLUtils;
+
+public class Cards extends GLSurfaceView implements GLSurfaceView.Renderer
{
- /* Public Methods */
- public Cards()
+ /* Shader data */
+ private final String vertSource
+ = "attribute vec4 a_position;"
+ + "attribute vec2 a_mapping;"
+ + "varying vec2 v_mapping;"
+ + "void main() {"
+ + " gl_Position = a_position;"
+ + " v_mapping = a_mapping;"
+ + "}";
+
+ private final String fragSource
+ = "precision mediump float;"
+ + "uniform sampler2D u_texture;"
+ + "uniform vec4 u_color;"
+ + "varying vec2 v_mapping;"
+ + "void main() {"
+ + " gl_FragColor = texture2D("
+ + " u_texture, v_mapping);"
+ + "}";
+
+ /* Drawing data */
+ private final float vertCoords[] = {
+ -0.5f, 0.5f, 0.0f,
+ -0.5f, -0.5f, 0.0f,
+ 0.5f, -0.5f, 0.0f,
+ 0.5f, 0.5f, 0.0f,
+ };
+
+ private final float mapCoords[] = {
+ 0.0f, 0.0f,
+ 0.0f, 1.0f,
+ 1.0f, 1.0f,
+ 1.0f, 0.0f,
+ };
+
+ private final float color[] = {
+ 1, 0, 0, 1
+ };
+
+ /* Cards data */
+ private final String cards[] = {
+ "As", "Ks", "Qs", "Js", "10s", "9s", "8s", "7s", "6s", "5s", "4s", "3s", "2s",
+ "Ah", "Kh", "Qh", "Jh", "10h", "9h", "8h", "7h", "6h", "5h", "4h", "3h", "2h",
+ "Ac", "Kc", "Qc", "Jc", "10c", "9c", "8c", "7c", "6c", "5c", "4c", "3c", "2c",
+ "Ad", "Kd", "Qd", "Jd", "10d", "9d", "8d", "7d", "6d", "5d", "4d", "3d", "2d",
+ };
+
+ /* Private data */
+ private Resources res; // app resources
+ private int program; // opengl program
+
+ private FloatBuffer vertBuf; // vertex position buffer
+ private FloatBuffer mapBuf; // texture mapping coord buffer
+
+ private int vertHandle; // vertex positions
+ private int mapHandle; // texture mapping coords
+ private int texHandle; // texture data
+ private int colorHandle; // color data
+
+ private int face[]; // card face textures
+ private int red; // red card back
+ private int blue; // blue card back
+
+ /* Private methods */
+ private int loadShader(int type, String code)
+ {
+ Os.debug("Cards: loadShader");
+
+ int shader = GLES20.glCreateShader(type);
+ GLES20.glShaderSource(shader, code);
+ GLES20.glCompileShader(shader);
+ return shader;
+ }
+
+ private int loadTexture(String name)
+ {
+ Os.debug("Cards: loadTexture - " + name);
+
+ final int[] tex = new int[1];
+
+ /* Lookup the resource ID */
+ int id = 0;
+ try {
+ id = R.drawable.class.getField(name).getInt(null);
+ } catch(Exception e) {
+ Os.debug("Cards: lookup failed for '" + name + "'", e);
+ return 0;
+ }
+
+ /* Load the bitmap */
+ Bitmap bitmap = BitmapFactory.decodeResource(this.res, id);
+
+ /* Copy into OpenGL */
+ GLES20.glGenTextures(1, tex, 0);
+ GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, tex[0]);
+ GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0);
+ GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
+ GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
+
+ return tex[0];
+ }
+
+ private FloatBuffer loadBuffer(float[] data)
{
- Os.debug("Cards create");
+ ByteBuffer bytes = ByteBuffer.allocateDirect(data.length * 4);
+ bytes.order(ByteOrder.nativeOrder());
+
+ FloatBuffer buf = bytes.asFloatBuffer();
+ buf.put(data);
+ buf.position(0);
+
+ return buf;
+ }
+
+ /* GLSurfaceView Methods */
+ public Cards(Context context)
+ {
+ super(context);
+ Os.debug("Cards: create");
+
+ this.res = context.getResources();
+
+ this.face = new int[52];
+
+ this.setEGLContextClientVersion(2);
+ this.setRenderer(this);
+ this.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
+ }
+
+ /* Renderer methods */
+ @Override
+ public void onSurfaceCreated(GL10 unused, EGLConfig config)
+ {
+ Os.debug("Cards: onSurfaceCreate");
+
+ /* Initialize shaders */
+ int vertShader = this.loadShader(GLES20.GL_VERTEX_SHADER, vertSource);
+ int fragShader = this.loadShader(GLES20.GL_FRAGMENT_SHADER, fragSource);
+
+ /* Link shaders into an OpenGL program */
+ this.program = GLES20.glCreateProgram();
+ GLES20.glAttachShader(program, vertShader);
+ GLES20.glAttachShader(program, fragShader);
+ GLES20.glLinkProgram(program);
+
+ /* Get shaders attributes */
+ this.vertHandle = GLES20.glGetAttribLocation(program, "a_position");
+ this.mapHandle = GLES20.glGetAttribLocation(program, "a_mapping");
+ this.texHandle = GLES20.glGetUniformLocation(program, "u_texture");
+ this.colorHandle = GLES20.glGetUniformLocation(program, "u_color");
+
+ /* Create vertex array */
+ this.vertBuf = this.loadBuffer(this.vertCoords);
+ this.mapBuf = this.loadBuffer(this.mapCoords);
+
+ /* Load textures */
+ for (int i = 0; i < 52; i++) {
+ String name = "card_" + this.cards[i].toLowerCase();
+ this.face[i] = this.loadTexture(name);
+ }
+ this.red = this.loadTexture("card_red");
+ this.blue = this.loadTexture("card_blue");
+
+ /* Debug */
+ Os.debug("Cards: onSurfaceCreate");
+ }
+
+ @Override
+ public void onDrawFrame(GL10 unused)
+ {
+ Os.debug("Cards: onDrawFrame");
+
+ /* Turn on the program */
+ GLES20.glUseProgram(program);
+
+ /* Draw */
+ GLES20.glClearColor(0, 0, 0, 1);
+ GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
+
+ GLES20.glEnableVertexAttribArray(this.vertHandle);
+ GLES20.glEnableVertexAttribArray(this.mapHandle);
+ GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.vertBuf);
+ GLES20.glVertexAttribPointer(this.mapHandle, 2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
+
+ GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
+ GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, this.red);
+ GLES20.glUniform1i(this.texHandle, 0);
+
+ GLES20.glUniform4fv(this.colorHandle, 1, this.color, 0);
+
+ GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
+ GLES20.glDisableVertexAttribArray(this.mapHandle);
+ }
+
+ @Override
+ public void onSurfaceChanged(GL10 unused, int width, int height)
+ {
+ Os.debug("Cards: onSurfaceChanged");
+
+ GLES20.glViewport(0, 0, width, height);
}
}
projects / ~andy / spades / blobdiff