private void Load()
{
System.IO.Stream fs = null;
try
{
IGL10 gl = _glGraphics.GL10;
int[] textureId = new int[1];
gl.GlGenTextures(1, textureId, 0);
_textureId = textureId [0];
fs = _fileIO.ReadAsset(_fileName);
Bitmap b = BitmapFactory.DecodeStream(fs);
gl.GlBindTexture(GL10.GlTexture2d, _textureId);
SetFilters(GL10.GlNearest, GL10.GlNearest);
Android.Opengl.GLUtils.TexImage2D(GL10.GlTexture2d, 0, b, 0);
b.Recycle();
}
catch
{
throw new Java.Lang.RuntimeException("Couldn't load texture from asset");
}
finally
{
if (fs != null)
{
fs.Close();
}
}
}
/// <summary>
/// 加载位图生成纹理
/// </summary>
/// <param name="gl"></param>
private void loadTexture(IGL10 gl)
{
Bitmap bitmap = null;
try
{
// 加载位图
bitmap = BitmapFactory.DecodeResource(ma.Resources, Resource.Drawable.sand);
int[] textures = new int[1];
// 指定生成N个纹理（第一个参数指定生成一个纹理）
// textures数组将负责存储所有纹理的代号
gl.GlGenTextures(1, textures, 0);
// 获取textures纹理数组中的第一个纹理
texture = textures[0];
// 通知OpenGL将texture纹理绑定到GL10.GL_TEXTURE_2D目标中
gl.GlBindTexture(GL10.GlTexture2d, texture);
// 设置纹理被缩小（距离视点很远时被缩小）时的滤波方式
gl.GlTexParameterf(GL10.GlTexture2d, GL10.GlTextureMinFilter, GL10.GlNearest);
// 设置纹理被放大（距离视点很近时被方法）时的滤波方式
gl.GlTexParameterf(GL10.GlTexture2d, GL10.GlTextureMagFilter, GL10.GlLinear);
// 设置在横向、纵向上都是平铺纹理
gl.GlTexParameterf(GL10.GlTexture2d, GL10.GlTextureWrapS, GL10.GlRepeat);
gl.GlTexParameterf(GL10.GlTexture2d, GL10.GlTextureWrapT, GL10.GlRepeat);
// 加载位图生成纹理
GLUtils.TexImage2D(GL10.GlTexture2d, 0, bitmap, 0);
}
finally
{
// 生成纹理之后，回收位图
if (bitmap != null)
{
bitmap.Recycle();
}
}
}
int LoadTexture(string assetName)
{
try
{
Bitmap b = BitmapFactory.DecodeStream(game.FileIO.ReadAsset(assetName));
IGL10 gl = _glGraphics.GL10;
int[] tId = new int[1];
gl.GlGenTextures(1, tId, 0);
int textureId = tId[0];
gl.GlBindTexture(GL10.GlTexture2d, textureId);
gl.GlTexParameterf(GL10.GlTexture2d, GL10.GlTextureMinFilter, GL10.GlNearest);
gl.GlTexParameterf(GL10.GlTexture2d, GL10.GlTextureMagFilter, GL10.GlNearest);
Android.Opengl.GLUtils.TexImage2D(GL10.GlTexture2d, 0, b, 0);
b.Recycle();
return(textureId);
}
catch
{
throw new Java.Lang.RuntimeException("Couldn't load asset");
}
}
public void OnDrawFrame(IGL10 gl)
{
// First allocate texture if there is not one yet.
if (DRAW_TEXTURE && mTextureIds == null)
{
// Generate texture.
mTextureIds = new int[2];
gl.GlGenTextures(2, mTextureIds, 0);
foreach (int textureId in mTextureIds)
{
// Set texture attributes.
gl.GlBindTexture(GL10.GlTexture2d, textureId);
gl.GlTexParameterf(GL10.GlTexture2d,
GL10.GlTextureMinFilter, GL10.GlNearest);
gl.GlTexParameterf(GL10.GlTexture2d,
GL10.GlTextureMagFilter, GL10.GlNearest);
gl.GlTexParameterf(GL10.GlTexture2d, GL10.GlTextureWrapS,
GL10.GlClampToEdge);
gl.GlTexParameterf(GL10.GlTexture2d, GL10.GlTextureWrapT,
GL10.GlClampToEdge);
}
}
if (DRAW_TEXTURE && mTexturePage.TexturesChanged)
{
gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[0]);
Bitmap texture = mTexturePage.GetTexture(mTextureRectFront,
CurlPage.SIDE_FRONT);
GLUtils.TexImage2D(GL10.GlTexture2d, 0, texture, 0);
texture.Recycle();
mTextureBack = mTexturePage.HasBackTexture;
if (mTextureBack)
{
gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[1]);
texture = mTexturePage.GetTexture(mTextureRectBack,
CurlPage.SIDE_BACK);
GLUtils.TexImage2D(GL10.GlTexture2d, 0, texture, 0);
texture.Recycle();
}
else
{
mTextureRectBack.Set(mTextureRectFront);
}
mTexturePage.Recycle();
Reset();
}
// Some 'global' settings.
gl.GlEnableClientState(GL10.GlVertexArray);
// TODO: Drop shadow drawing is done temporarily here to hide some
// problems with its calculation.
if (DRAW_SHADOW)
{
gl.GlDisable(GL10.GlTexture2d);
gl.GlEnable(GL10.GlBlend);
gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
gl.GlEnableClientState(GL10.GlColorArray);
gl.GlColorPointer(4, GL10.GlFloat, 0, mBufShadowColors);
gl.GlVertexPointer(3, GL10.GlFloat, 0, mBufShadowVertices);
gl.GlDrawArrays(GL10.GlTriangleStrip, 0, mDropShadowCount);
gl.GlDisableClientState(GL10.GlColorArray);
gl.GlDisable(GL10.GlBlend);
}
if (DRAW_TEXTURE)
{
gl.GlEnableClientState(GL10.GlTextureCoordArray);
gl.GlTexCoordPointer(2, GL10.GlFloat, 0, mBufTexCoords);
}
gl.GlVertexPointer(3, GL10.GlFloat, 0, mBufVertices);
// Enable color array.
gl.GlEnableClientState(GL10.GlColorArray);
gl.GlColorPointer(4, GL10.GlFloat, 0, mBufColors);
// Draw front facing blank vertices.
gl.GlDisable(GL10.GlTexture2d);
gl.GlDrawArrays(GL10.GlTriangleStrip, 0, mVerticesCountFront);
// Draw front facing texture.
if (DRAW_TEXTURE)
{
gl.GlEnable(GL10.GlBlend);
gl.GlEnable(GL10.GlTexture2d);
if (!mFlipTexture || !mTextureBack)
{
gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[0]);
}
else
{
gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[1]);
}
gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
gl.GlDrawArrays(GL10.GlTriangleStrip, 0, mVerticesCountFront);
gl.GlDisable(GL10.GlBlend);
gl.GlDisable(GL10.GlTexture2d);
}
int backStartIdx = Math.Max(0, mVerticesCountFront - 2);
int backCount = mVerticesCountFront + mVerticesCountBack - backStartIdx;
// Draw back facing blank vertices.
gl.GlDrawArrays(GL10.GlTriangleStrip, backStartIdx, backCount);
// Draw back facing texture.
if (DRAW_TEXTURE)
{
gl.GlEnable(GL10.GlBlend);
gl.GlEnable(GL10.GlTexture2d);
if (mFlipTexture || !mTextureBack)
{
gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[0]);
}
else
{
gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[1]);
}
gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
gl.GlDrawArrays(GL10.GlTriangleStrip, backStartIdx, backCount);
gl.GlDisable(GL10.GlBlend);
gl.GlDisable(GL10.GlTexture2d);
}
// Disable textures and color array.
gl.GlDisableClientState(GL10.GlTextureCoordArray);
gl.GlDisableClientState(GL10.GlColorArray);
if (DRAW_POLYGON_OUTLINES)
{
gl.GlEnable(GL10.GlBlend);
gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
gl.GlLineWidth(1.0f);
gl.GlColor4f(0.5f, 0.5f, 1.0f, 1.0f);
gl.GlVertexPointer(3, GL10.GlFloat, 0, mBufVertices);
gl.GlDrawArrays(GL10.GlLineStrip, 0, mVerticesCountFront);
gl.GlDisable(GL10.GlBlend);
}
if (DRAW_CURL_POSITION)
{
gl.GlEnable(GL10.GlBlend);
gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
gl.GlLineWidth(1.0f);
gl.GlColor4f(1.0f, 0.5f, 0.5f, 1.0f);
gl.GlVertexPointer(2, GL10.GlFloat, 0, mBufCurlPositionLines);
gl.GlDrawArrays(GL10.GlLines, 0, mCurlPositionLinesCount * 2);
gl.GlDisable(GL10.GlBlend);
}
if (DRAW_SHADOW)
{
gl.GlEnable(GL10.GlBlend);
gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
gl.GlEnableClientState(GL10.GlColorArray);
gl.GlColorPointer(4, GL10.GlFloat, 0, mBufShadowColors);
gl.GlVertexPointer(3, GL10.GlFloat, 0, mBufShadowVertices);
gl.GlDrawArrays(GL10.GlTriangleStrip, mDropShadowCount,
mSelfShadowCount);
gl.GlDisableClientState(GL10.GlColorArray);
gl.GlDisable(GL10.GlBlend);
}
gl.GlDisableClientState(GL10.GlVertexArray);
}