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Merge change 1195 into donut

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* changes:
  Use direct, native order Buffers for OpenGL data.
This commit is contained in:
Android (Google) Code Review
2009-05-07 17:00:54 -07:00
parent dc4ba99cd7 d9b9c8eaaa
commit bc139139b0
1 changed files with 93 additions and 94 deletions
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43
samples/ApiDemos/src/com/example/android/apis/graphics/spritetext/Grid.java
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@@ -16,6 +16,8 @@
package com.example.android.apis.graphics.spritetext;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.CharBuffer;
import java.nio.FloatBuffer;
@@ -41,18 +43,20 @@ class Grid {
mW = w;
mH = h;
int size = w * h;
mVertexArray = new float[size * 3];
mVertexBuffer = FloatBuffer.wrap(mVertexArray);
mTexCoordArray = new float[size * 2];
mTexCoordBuffer = FloatBuffer.wrap(mTexCoordArray);
final int FLOAT_SIZE = 4;
final int CHAR_SIZE = 2;
mVertexBuffer = ByteBuffer.allocateDirect(FLOAT_SIZE * size * 3)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
mTexCoordBuffer = ByteBuffer.allocateDirect(FLOAT_SIZE * size * 2)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
int quadW = mW - 1;
int quadH = mH - 1;
int quadCount = quadW * quadH;
int indexCount = quadCount * 6;
mIndexCount = indexCount;
char[] indexArray = new char[indexCount];
mIndexBuffer = ByteBuffer.allocateDirect(CHAR_SIZE * indexCount)
.order(ByteOrder.nativeOrder()).asCharBuffer();
/*
* Initialize triangle list mesh.
@@ -75,18 +79,17 @@ class Grid {
char c = (char) ((y + 1) * mW + x);
char d = (char) ((y + 1) * mW + x + 1);
indexArray[i++] = a;
indexArray[i++] = b;
indexArray[i++] = c;
mIndexBuffer.put(i++, a);
mIndexBuffer.put(i++, b);
mIndexBuffer.put(i++, c);
indexArray[i++] = b;
indexArray[i++] = c;
indexArray[i++] = d;
mIndexBuffer.put(i++, b);
mIndexBuffer.put(i++, c);
mIndexBuffer.put(i++, d);
}
}
}
mIndexBuffer = CharBuffer.wrap(indexArray);
}
void set(int i, int j, float x, float y, float z, float u, float v) {
@@ -100,13 +103,13 @@ class Grid {
int index = mW * j + i;
int posIndex = index * 3;
mVertexArray[posIndex] = x;
mVertexArray[posIndex + 1] = y;
mVertexArray[posIndex + 2] = z;
mVertexBuffer.put(posIndex, x);
mVertexBuffer.put(posIndex + 1, y);
mVertexBuffer.put(posIndex + 2, z);
int texIndex = index * 2;
mTexCoordArray[texIndex] = u;
mTexCoordArray[texIndex + 1] = v;
mTexCoordBuffer.put(texIndex, u);
mTexCoordBuffer.put(texIndex + 1, v);
}
public void draw(GL10 gl, boolean useTexture) {
@@ -128,11 +131,7 @@ class Grid {
}
private FloatBuffer mVertexBuffer;
private float[] mVertexArray;
private FloatBuffer mTexCoordBuffer;
private float[] mTexCoordArray;
private CharBuffer mIndexBuffer;
private int mW;