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v0.4.2: updated quad indicies to be stored in a VBO

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This commit is contained in:
Evan Debenham
2016-08-19 19:22:42 -04:00
parent 2a5f887579
commit 0e7c12b61e
2 changed files with 34 additions and 11 deletions
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26
SPD-classes/src/main/java/com/watabou/glwrap/Quad.java
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@@ -21,6 +21,8 @@
package com.watabou.glwrap;
import android.opengl.GLES20;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
@@ -37,6 +39,7 @@ public class Quad {
private static ShortBuffer indices;
private static int indexSize = 0;
private static int bufferIndex = -1;
public static FloatBuffer create() {
return ByteBuffer.
@@ -51,13 +54,32 @@ public class Quad {
order( ByteOrder.nativeOrder() ).
asFloatBuffer();
}
//sets up for drawing up to 32k quads in one command, shouldn't ever need to exceed this
public static void setupIndices(){
ShortBuffer indices = getIndices( Short.MAX_VALUE );
if (bufferIndex == -1){
int[] buf = new int[1];
GLES20.glGenBuffers(1, buf, 0);
bufferIndex = buf[0];
}
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, bufferIndex);
GLES20.glBufferData(GLES20.GL_ELEMENT_ARRAY_BUFFER, (indices.capacity()*2), indices, GLES20.GL_STATIC_DRAW);
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, 0);
}
public static void bindIndices(){
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, bufferIndex);
}
public static void releaseIndices(){
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, 0);
}
public static ShortBuffer getIndices( int size ) {
if (size > indexSize) {
// TODO: Optimize it!
indexSize = size;
indices = ByteBuffer.
allocateDirect( size * SIZE * Short.SIZE / 8 ).