1 files changed, 116 insertions, 0 deletions
diff --git a/graphics/java/android/renderscript/ProgramVertexAlloc.java b/graphics/java/android/renderscript/ProgramVertexAlloc.java
new file mode 100644
index 0000000..82bcc30
--- /dev/null
+++ b/graphics/java/android/renderscript/ProgramVertexAlloc.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.renderscript;
+
+import java.lang.Math;
+import android.util.Log;
+
+
+/**
+ * @hide
+ *
+ **/
+public class ProgramVertexAlloc {
+    public static final int MODELVIEW_OFFSET = 0;
+    public static final int PROJECTION_OFFSET = 16;
+    public static final int TEXTURE_OFFSET = 32;
+
+    Matrix mModel;
+    Matrix mProjection;
+    Matrix mTexture;
+
+    public RenderScript.Allocation mAlloc;
+
+    public ProgramVertexAlloc(RenderScript rs) {
+        mModel = new Matrix();
+        mProjection = new Matrix();
+        mTexture = new Matrix();
+
+        mAlloc = rs.allocationCreatePredefSized(
+            RenderScript.ElementPredefined.USER_FLOAT, 
+            48);
+
+        mAlloc.subData1D(MODELVIEW_OFFSET, 16, mModel.mMat);
+        mAlloc.subData1D(PROJECTION_OFFSET, 16, mProjection.mMat);
+        mAlloc.subData1D(TEXTURE_OFFSET, 16, mTexture.mMat);
+    }
+
+    public void loadModelview(Matrix m) {
+        mModel = m;
+        mAlloc.subData1D(MODELVIEW_OFFSET, 16, m.mMat);
+    }
+
+    public void loadProjection(Matrix m) {
+        mProjection = m;
+        mAlloc.subData1D(PROJECTION_OFFSET, 16, m.mMat);
+    }
+
+    public void loadTexture(Matrix m) {
+        mTexture = m;
+        mAlloc.subData1D(TEXTURE_OFFSET, 16, m.mMat);
+    }
+
+    public void setupOrthoWindow(int w, int h) {
+        mProjection.loadOrtho(0,w, h,0, -1,1);
+        mAlloc.subData1D(PROJECTION_OFFSET, 16, mProjection.mMat);
+    }
+
+    public void setupOrthoNormalized(int w, int h) {
+        // range -1,1 in the narrow axis.
+        if(w > h) {
+            float aspect = ((float)w) / h;
+            mProjection.loadOrtho(-aspect,aspect,  -1,1,  -1,1);
+        } else {
+            float aspect = ((float)h) / w;
+            mProjection.loadOrtho(-1,1, -aspect,aspect,  -1,1);
+        }
+        mAlloc.subData1D(PROJECTION_OFFSET, 16, mProjection.mMat);
+    }
+
+    public void setupProjectionNormalized(int w, int h) {
+        // range -1,1 in the narrow axis at z = 0.
+        Matrix m1 = new Matrix();
+        Matrix m2 = new Matrix();
+
+        if(w > h) {
+            float aspect = ((float)w) / h;
+            m1.loadFrustum(-aspect,aspect,  -1,1,  1,100);
+        } else {
+            float aspect = ((float)h) / w;
+            m1.loadFrustum(-1,1, -aspect,aspect, 1,100);
+        }
+
+        m2.loadRotate(180, 0, 1, 0);
+        m1.loadMultiply(m1, m2);
+
+        m2.loadScale(-2, 2, 1);
+        m1.loadMultiply(m1, m2);
+
+        m2.loadTranslate(0, 0, 2);
+        m1.loadMultiply(m1, m2);
+
+        mProjection = m1;
+        mAlloc.subData1D(PROJECTION_OFFSET, 16, mProjection.mMat);
+    }
+
+}
+
+
+
+
+
+