ExternalOES纹理数据 转换为 TEXTURE-2D纹理数据 工程代码

package com.xiaxl.oes2texture.gl; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.opengl.GLES11Ext; import android.opengl.GLES30; import android.opengl.GLUtils; import com.xiaxl.oes2texture.utils.LogUtils; import java.io.IOException; import java.io.InputStream; public class TextureUtil { private static final String TAG = "TextureUtil"; public static void createFramebuffers(int[] frameBuffer) { // 创建帧缓冲区 GLES30.glGenFramebuffers(frameBuffer.length, frameBuffer, 0); } /** * 创建空白纹理 * * @param texPixWidth 要生成的纹理的宽高 * @param texPixHeight 要生成的纹理的宽高 * @return */ public static int createEmptyTexture2D(int texPixWidth, int texPixHeight, int texSampleType) { // 生成纹理ID int[] textures = new int[1]; GLES30.glGenTextures(1, textures, 0); // 绑定纹理 GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, textures[0]); // 纹理采样方式:最近点采样 GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, texSampleType); GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, texSampleType); GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_CLAMP_TO_EDGE); GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_CLAMP_TO_EDGE); // 创建一个空的2D纹理对象，指定其基本参数，并绑定到对应的纹理ID上 GLES30.glTexImage2D(GLES30.GL_TEXTURE_2D, 0, GLES30.GL_RGBA, texPixWidth, texPixHeight, 0, GLES30.GL_RGBA, GLES30.GL_UNSIGNED_BYTE, null); // 取消绑定纹理 GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, GLES30.GL_NONE); return textures[0]; } /** * @param texSampleType * @return */ public static int createTextureOES(int texSampleType) { int[] textures = new int[1]; GLES30.glGenTextures(1, textures, 0); TextureUtil.checkGlError("glGenTextures"); int texId = textures[0]; GLES30.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, texId); TextureUtil.checkGlError("glBindTexture " + texId); // OES纹理采样 GLES30.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES30.GL_TEXTURE_MIN_FILTER, texSampleType); GLES30.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES30.GL_TEXTURE_MAG_FILTER, texSampleType); GLES30.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_CLAMP_TO_EDGE); GLES30.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_CLAMP_TO_EDGE); TextureUtil.checkGlError("glTexParameter"); return texId; } /** * 创建一个绑定 Bitmap 资源的纹理 * * @param context * @param drawableId R.drawable.xxx.jpg * @return */ public static int createDrawableTexture2D(Context context, int drawableId) { // 生成纹理ID int[] textures = new int[1]; GLES30.glGenTextures(1, textures, 0); // 绑定纹理 GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, textures[0]); // 纹理采样方式 GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, GLES30.GL_NEAREST); GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, GLES30.GL_LINEAR); GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_CLAMP_TO_EDGE); GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_CLAMP_TO_EDGE); // 通过输入流加载Bitmap InputStream is = context.getResources().openRawResource(drawableId); Bitmap bitmapTmp; try { bitmapTmp = BitmapFactory.decodeStream(is); } finally { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } // 使用GLES30.GL_COLOR_ATTACHMENT0将纹理作为颜色附着点附加到帧缓冲对象上 GLUtils.texImage2D(GLES30.GL_TEXTURE_2D, // 纹理类型 0, GLUtils.getInternalFormat(bitmapTmp), bitmapTmp, // 纹理图像 GLUtils.getType(bitmapTmp), 0 // 纹理边框尺寸 ); bitmapTmp.recycle(); // 取消绑定纹理 GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, GLES30.GL_NONE); return textures[0]; } /** * 创建空白纹理，并绑定帧缓冲区 * * @param frameBuffer 要绑定的帧缓冲区 * @param texPixWidth 要生成的纹理的宽高 * @param texPixHeight 要生成的纹理的宽高 * @return */ public static int createEmptyTexture2DBindFrameBuffer(int[] frameBuffer, int texPixWidth, int texPixHeight, int texSampleType) { // 生成纹理ID int[] textures = new int[1]; GLES30.glGenTextures(1, textures, 0); // 绑定纹理 GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, textures[0]); // 纹理采样方式:线性采样 GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, texSampleType); GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, texSampleType); GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_CLAMP_TO_EDGE); GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_CLAMP_TO_EDGE); // 创建一个空的2D纹理对象，指定其基本参数，并绑定到对应的纹理ID上 GLES30.glTexImage2D(GLES30.GL_TEXTURE_2D, 0, GLES30.GL_RGBA, texPixWidth, texPixHeight, 0, GLES30.GL_RGBA, GLES30.GL_UNSIGNED_BYTE, null); // 取消绑定纹理 GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, GLES30.GL_NONE); /** * 帧缓冲区 */ // 创建帧缓冲区 GLES30.glGenFramebuffers(1, frameBuffer, 0); // 将帧缓冲对象绑定到OpenGL ES上下文的帧缓冲目标上 GLES30.glBindFramebuffer(GLES30.GL_FRAMEBUFFER, frameBuffer[0]); // 使用GLES30.GL_COLOR_ATTACHMENT0将纹理作为颜色附着点附加到帧缓冲对象上 GLES30.glFramebufferTexture2D(GLES30.GL_FRAMEBUFFER, GLES30.GL_COLOR_ATTACHMENT0, GLES30.GL_TEXTURE_2D, textures[0], 0); // 取消绑定缓冲区 GLES30.glBindFramebuffer(GLES30.GL_FRAMEBUFFER, GLES30.GL_NONE); return textures[0]; } /** * Checks to see if a GLES error has been raised. */ public static void checkGlError(String op) { int error = GLES30.glGetError(); if (error != GLES30.GL_NO_ERROR) { String msg = op + ": glError 0x" + Integer.toHexString(error); LogUtils.e(TAG, msg); throw new RuntimeException(msg); } } }