Example usage for android.opengl GLES10 glGenTextures

Introduction

In this page you can find the example usage for android.opengl GLES10 glGenTextures.

Prototype

public static native void glGenTextures(int n, int[] textures, int offset);

Source Link

Usage

From source file:com.adobe.plugins.FastCanvasRenderer.java

public void loadTexture(Bitmap bmp, int id) {
    if (bmp == null) {
        Log.i("CANVAS", "CanvasRenderer Aborting loadtexture " + id);
        return;/*from ww w  .  ja  v  a  2  s  .co m*/
    }

    int[] glID = new int[1];
    GLES10.glGenTextures(1, glID, 0);
    GLES10.glBindTexture(GLES10.GL_TEXTURE_2D, glID[0]);
    GLES10.glTexParameterf(GLES10.GL_TEXTURE_2D, GLES10.GL_TEXTURE_MIN_FILTER, GLES10.GL_LINEAR);
    GLES10.glTexParameterf(GLES10.GL_TEXTURE_2D, GLES10.GL_TEXTURE_MAG_FILTER, GLES10.GL_LINEAR);

    int width = bmp.getWidth();
    int height = bmp.getHeight();
    int p2Width = 2;
    while (p2Width < width) {
        p2Width *= 2;
    }

    int p2Height = 2;
    while (p2Height < height) {
        p2Height *= 2;
    }

    if (width == p2Width && height == p2Height) {
        GLUtils.texImage2D(GLES10.GL_TEXTURE_2D, 0, bmp, 0);
    } else {
        Log.i("Canvas", "Canvas::AddTexture scaling texture " + id + " to power of 2");
        GLES10.glTexImage2D(GLES10.GL_TEXTURE_2D, 0, GLES10.GL_RGBA, p2Width, p2Height, 0, GLES10.GL_RGBA,
                GLES10.GL_UNSIGNED_BYTE, null);
        GLUtils.texSubImage2D(GLES10.GL_TEXTURE_2D, 0, 0, 0, bmp);
        width = p2Width;
        height = p2Height;
    }

    checkError();

    FastCanvasJNI.addTexture(id, glID[0], width, height);
    Log.i("CANVAS", "CanvasRenderer Leaving loadtexture " + id);
}

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