org.skia.jetskidemo.AnimationRenderer Class Reference

Inheritance diagram for org.skia.jetskidemo.AnimationRenderer:

Protected Member Functions
void	onSurfaceInitialized (Surface surface)
void	onRenderFrame (Canvas canvas, long ms)
abstract void	onSurfaceInitialized (Surface surface)
abstract void	onRenderFrame (Canvas canvas, long ms)

Additional Inherited Members
Public Member Functions inherited from org.skia.jetski.util.SurfaceRenderer
void	run ()
void	surfaceCreated (SurfaceHolder holder)
void	surfaceChanged (SurfaceHolder holder, int format, int width, int height)
void	surfaceDestroyed (SurfaceHolder holder)
void	setBaseTime (long millis)
void	release ()

Detailed Description

Definition at line 16 of file AnimationActivity.java.

Member Function Documentation

onRenderFrame()

void org.skia.jetskidemo.AnimationRenderer.onRenderFrame ( Canvas  canvas, long  ms  )

inlineprotected

Callback for frame content.

Invoked once per (vsync'ed) frame.

Reimplemented from org.skia.jetski.util.SurfaceRenderer.

Definition at line 57 of file AnimationActivity.java.

                                                         {
        final float kWidth  = 400,
                    kHeight = 200,
                    kSpeed  = 4;
 
        canvas.drawColor(0xffffffe0);
 
        float cw = canvas.getWidth(),
              ch = canvas.getHeight(),
            osc1 = (float)(java.lang.Math.cos(ms * kSpeed / 1000)),
            osc2 = (float)(java.lang.Math.sin(ms * kSpeed / 1000));
 
        drawRect(canvas, (1 + osc1)*cw/2, ch/2, mLinearGradient);
        drawRect(canvas, (1 - osc1)*cw/2, ch/2, mConicalGradient);
        drawRect(canvas, cw/2, (1 + osc2)*ch/2, mRadialGradient);
        drawRect(canvas, cw/2, (1 - osc2)*ch/2, mSweepGradient);
    }

onSurfaceInitialized()

void org.skia.jetskidemo.AnimationRenderer.onSurfaceInitialized ( Surface  surface )

inlineprotected

Initialization callback.

This can be invoked multiple times if the underlying surface changes.

Reimplemented from org.skia.jetski.util.SurfaceRenderer.

Definition at line 29 of file AnimationActivity.java.

                                                         {
        float sw = surface.getWidth(),
              sh = surface.getHeight();
 
        float[] colors1 = {
                            1,0,0,1,
                            0,1,0,1,
                            0,0,1,1
                          };
        int[]   colors2 = {
                            0xffffff00,
                            0xff00ffff,
                            0xffff00ff
                          };
 
        float[] pos = {0, 0.5f, 1};
 
        mLinearGradient = new LinearGradient(0, 0, sw/4, 0,
                                             colors1, pos, TileMode.REPEAT);
        mRadialGradient = new RadialGradient(sw/2, sh/4, Math.min(sw, sh)/2,
                                             colors2, pos, TileMode.REPEAT);
        mConicalGradient = new TwoPointConicalGradient(sw/4, sh/2, sw/4,
                                                       sw/2, sh/2, sw/2,
                                                       colors1, pos, TileMode.MIRROR);
        mSweepGradient = new SweepGradient(sw/2, sh/4, 0, 90, colors2, pos, TileMode.REPEAT);
    }

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The documentation for this class was generated from the following file:

• third_party/skia/platform_tools/android/apps/jetskidemo/src/main/java/org/skia/jetskidemo/AnimationActivity.java