drgreen/android_frameworks_base
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add plumbing to support gradients in OpenGL renderer.

Browse Source 
The LinearGradient class keeps a copy of the various parameters that
define the gradient. The copies are native arrays to avoid copying
Java arrays on every draw call. The gradient code path is implemented
until OpenGLRenderer::drawRect() (see TODO.) The actual gradient
implementation will be added in a latter change.

Change-Id: I9300d250ef5e2e9c2e097c3116ee71dfc9d752d8
This commit is contained in:
Romain Guy
2010-07-16 17:10:13 -07:00
parent 1e79386ba3
commit 7fac2e1833
7 changed files with 161 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
graphics/java/android/graphics/LinearGradient.java
View File

@ -17,6 +17,27 @@
package android.graphics;
public class LinearGradient extends Shader {
/**
* These fields are manipulated by the JNI layer, don't touch!
* @hide
*/
public int bounds;
/**
* @hide
*/
public int colors;
/**
* @hide
*/
public int positions;
/**
* @hide
*/
public int count;
/**
* @hide
*/
public int tileMode;
/** Create a shader that draws a linear gradient along a line.
@param x0 The x-coordinate for the start of the gradient line
@ -38,6 +59,8 @@ public class LinearGradient extends Shader {
throw new IllegalArgumentException("color and position arrays must be of equal length");
}
native_instance = nativeCreate1(x0, y0, x1, y1, colors, positions, tile.nativeInt);
count = colors.length;
tileMode = tile.nativeInt;
}
/** Create a shader that draws a linear gradient along a line.
@ -52,12 +75,18 @@ public class LinearGradient extends Shader {
public LinearGradient(float x0, float y0, float x1, float y1,
int color0, int color1, TileMode tile) {
native_instance = nativeCreate2(x0, y0, x1, y1, color0, color1, tile.nativeInt);
count = 2;
tileMode = tile.nativeInt;
}
protected void finalize() throws Throwable {
super.finalize();
nativeDestructor(native_instance);
}
private static native int nativeCreate1(float x0, float y0, float x1, float y1,
int colors[], float positions[], int tileMode);
private static native int nativeCreate2(float x0, float y0, float x1, float y1,
int color0, int color1, int tileMode);
private native void nativeDestructor(int native_shader);
private native int nativeCreate1(float x0, float y0, float x1, float y1,
int colors[], float positions[], int tileMode);
private native int nativeCreate2(float x0, float y0, float x1, float y1,
int color0, int color1, int tileMode);
}