--- /dev/null
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.gallery3d.ui;
+
+import android.graphics.Bitmap;
+import android.graphics.RectF;
+import android.opengl.GLES20;
+import android.opengl.GLUtils;
+import android.opengl.Matrix;
+import android.util.Log;
+
+import com.android.gallery3d.common.Utils;
+import com.android.gallery3d.util.IntArray;
+
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import javax.microedition.khronos.opengles.GL11;
+import javax.microedition.khronos.opengles.GL11ExtensionPack;
+
+public class GLES20Canvas extends GLCanvas implements GLId {
+ // ************** Constants **********************
+ private static final String TAG = GLES20Canvas.class.getSimpleName();
+ private static final int FLOAT_SIZE = Float.SIZE / Byte.SIZE;
+ private static final float OPAQUE_ALPHA = 0.95f;
+
+ private static final int COORDS_PER_VERTEX = 2;
+ private static final int VERTEX_STRIDE = COORDS_PER_VERTEX * FLOAT_SIZE;
+
+ private static final int COUNT_FILL_VERTEX = 4;
+ private static final int COUNT_LINE_VERTEX = 2;
+ private static final int COUNT_RECT_VERTEX = 4;
+ private static final int OFFSET_FILL_RECT = 0;
+ private static final int OFFSET_DRAW_LINE = OFFSET_FILL_RECT + COUNT_FILL_VERTEX;
+ private static final int OFFSET_DRAW_RECT = OFFSET_DRAW_LINE + COUNT_LINE_VERTEX;
+
+ private static final float[] BOX_COORDINATES = {
+ 0, 0, // Fill rectangle
+ 1, 0,
+ 0, 1,
+ 1, 1,
+ 0, 0, // Draw line
+ 1, 1,
+ 0, 0, // Draw rectangle outline
+ 0, 1,
+ 1, 1,
+ 1, 0,
+ };
+
+ private static final String POSITION_ATTRIBUTE = "aPosition";
+ private static final String COLOR_UNIFORM = "uColor";
+ private static final String MATRIX_UNIFORM = "uMatrix";
+ private static final String TEXTURE_MATRIX_UNIFORM = "uTextureMatrix";
+ private static final String TEXTURE_SAMPLER_UNIFORM = "uTextureSampler";
+ private static final String ALPHA_UNIFORM = "uAlpha";
+ private static final String TEXTURE_COORD_ATTRIBUTE = "aTextureCoordinate";
+
+ private static final String DRAW_VERTEX_SHADER = ""
+ + "uniform mat4 " + MATRIX_UNIFORM + ";\n"
+ + "attribute vec2 " + POSITION_ATTRIBUTE + ";\n"
+ + "void main() {\n"
+ + " vec4 pos = vec4(" + POSITION_ATTRIBUTE + ", 0.0, 1.0);\n"
+ + " gl_Position = " + MATRIX_UNIFORM + " * pos;\n"
+ + "}\n";
+
+ private static final String DRAW_FRAGMENT_SHADER = ""
+ + "precision mediump float;\n"
+ + "uniform vec4 " + COLOR_UNIFORM + ";\n"
+ + "void main() {\n"
+ + " gl_FragColor = " + COLOR_UNIFORM + ";\n"
+ + "}\n";
+
+ private static final String TEXTURE_VERTEX_SHADER = ""
+ + "uniform mat4 " + MATRIX_UNIFORM + ";\n"
+ + "uniform mat4 " + TEXTURE_MATRIX_UNIFORM + ";\n"
+ + "attribute vec2 " + POSITION_ATTRIBUTE + ";\n"
+ + "varying vec2 vTextureCoord;\n"
+ + "void main() {\n"
+ + " vec4 pos = vec4(" + POSITION_ATTRIBUTE + ", 0.0, 1.0);\n"
+ + " gl_Position = " + MATRIX_UNIFORM + " * pos;\n"
+ + " vTextureCoord = (" + TEXTURE_MATRIX_UNIFORM + " * pos).xy;\n"
+ + "}\n";
+
+ private static final String MESH_VERTEX_SHADER = ""
+ + "uniform mat4 " + MATRIX_UNIFORM + ";\n"
+ + "attribute vec2 " + POSITION_ATTRIBUTE + ";\n"
+ + "attribute vec2 " + TEXTURE_COORD_ATTRIBUTE + ";\n"
+ + "varying vec2 vTextureCoord;\n"
+ + "void main() {\n"
+ + " vec4 pos = vec4(" + POSITION_ATTRIBUTE + ", 0.0, 1.0);\n"
+ + " gl_Position = " + MATRIX_UNIFORM + " * pos;\n"
+ + " vTextureCoord = " + TEXTURE_COORD_ATTRIBUTE + ";\n"
+ + "}\n";
+
+ private static final String TEXTURE_FRAGMENT_SHADER = ""
+ + "precision mediump float;\n"
+ + "varying vec2 vTextureCoord;\n"
+ + "uniform float " + ALPHA_UNIFORM + ";\n"
+ + "uniform sampler2D " + TEXTURE_SAMPLER_UNIFORM + ";\n"
+ + "void main() {\n"
+ + " gl_FragColor = texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", vTextureCoord);\n"
+ + " gl_FragColor.a *= " + ALPHA_UNIFORM + ";\n"
+ + "}\n";
+
+ private static final String OES_TEXTURE_FRAGMENT_SHADER = ""
+ + "#extension GL_OES_EGL_image_external : require\n"
+ + "precision mediump float;\n"
+ + "varying vec2 vTextureCoord;\n"
+ + "uniform float " + ALPHA_UNIFORM + ";\n"
+ + "uniform samplerExternalOES " + TEXTURE_SAMPLER_UNIFORM + ";\n"
+ + "void main() {\n"
+ + " gl_FragColor = texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", vTextureCoord);\n"
+ + " gl_FragColor.a *= " + ALPHA_UNIFORM + ";\n"
+ + "}\n";
+
+ private static final int INITIAL_RESTORE_STATE_SIZE = 8;
+ private static final int MATRIX_SIZE = 16;
+
+ // Keep track of restore state
+ private float[] mMatrices = new float[INITIAL_RESTORE_STATE_SIZE * MATRIX_SIZE];
+ private float[] mAlphas = new float[INITIAL_RESTORE_STATE_SIZE];
+ private IntArray mSaveFlags = new IntArray();
+ private ArrayList<Blending> mBlendings = new ArrayList<Blending>();
+
+ private int mCurrentAlphaIndex = 0;
+ private int mCurrentMatrixIndex = 0;
+
+ // Viewport size
+ private int mWidth;
+ private int mHeight;
+
+ // Projection matrix
+ private float[] mProjectionMatrix = new float[MATRIX_SIZE];
+
+ // Screen size for when we aren't bound to a texture
+ private int mScreenWidth;
+ private int mScreenHeight;
+
+ // GL programs
+ private int mDrawProgram;
+ private int mTextureProgram;
+ private int mOesTextureProgram;
+ private int mMeshProgram;
+
+ // GL buffer containing BOX_COORDINATES
+ private int mBoxCoordinates;
+
+ // Handle indices -- common
+ private static final int INDEX_POSITION = 0;
+ private static final int INDEX_MATRIX = 1;
+
+ // Handle indices -- draw
+ private static final int INDEX_COLOR = 2;
+
+ // Handle indices -- texture
+ private static final int INDEX_TEXTURE_MATRIX = 2;
+ private static final int INDEX_TEXTURE_SAMPLER = 3;
+ private static final int INDEX_ALPHA = 4;
+
+ // Handle indices -- mesh
+ private static final int INDEX_TEXTURE_COORD = 2;
+
+ private abstract static class ShaderParameter {
+ public int handle;
+ protected final String mName;
+
+ public ShaderParameter(String name) {
+ mName = name;
+ }
+
+ public abstract void loadHandle(int program);
+ }
+
+ private static class UniformShaderParameter extends ShaderParameter {
+ public UniformShaderParameter(String name) {
+ super(name);
+ }
+
+ @Override
+ public void loadHandle(int program) {
+ handle = GLES20.glGetUniformLocation(program, mName);
+ checkError();
+ }
+ }
+
+ private static class AttributeShaderParameter extends ShaderParameter {
+ public AttributeShaderParameter(String name) {
+ super(name);
+ }
+
+ @Override
+ public void loadHandle(int program) {
+ handle = GLES20.glGetAttribLocation(program, mName);
+ checkError();
+ }
+ }
+
+ ShaderParameter[] mDrawParameters = {
+ new AttributeShaderParameter(POSITION_ATTRIBUTE), // INDEX_POSITION
+ new UniformShaderParameter(MATRIX_UNIFORM), // INDEX_MATRIX
+ new UniformShaderParameter(COLOR_UNIFORM), // INDEX_COLOR
+ };
+ ShaderParameter[] mTextureParameters = {
+ new AttributeShaderParameter(POSITION_ATTRIBUTE), // INDEX_POSITION
+ new UniformShaderParameter(MATRIX_UNIFORM), // INDEX_MATRIX
+ new UniformShaderParameter(TEXTURE_MATRIX_UNIFORM), // INDEX_TEXTURE_MATRIX
+ new UniformShaderParameter(TEXTURE_SAMPLER_UNIFORM), // INDEX_TEXTURE_SAMPLER
+ new UniformShaderParameter(ALPHA_UNIFORM), // INDEX_ALPHA
+ };
+ ShaderParameter[] mOesTextureParameters = {
+ new AttributeShaderParameter(POSITION_ATTRIBUTE), // INDEX_POSITION
+ new UniformShaderParameter(MATRIX_UNIFORM), // INDEX_MATRIX
+ new UniformShaderParameter(TEXTURE_MATRIX_UNIFORM), // INDEX_TEXTURE_MATRIX
+ new UniformShaderParameter(TEXTURE_SAMPLER_UNIFORM), // INDEX_TEXTURE_SAMPLER
+ new UniformShaderParameter(ALPHA_UNIFORM), // INDEX_ALPHA
+ };
+ ShaderParameter[] mMeshParameters = {
+ new AttributeShaderParameter(POSITION_ATTRIBUTE), // INDEX_POSITION
+ new UniformShaderParameter(MATRIX_UNIFORM), // INDEX_MATRIX
+ new AttributeShaderParameter(TEXTURE_COORD_ATTRIBUTE), // INDEX_TEXTURE_COORD
+ new UniformShaderParameter(TEXTURE_SAMPLER_UNIFORM), // INDEX_TEXTURE_SAMPLER
+ new UniformShaderParameter(ALPHA_UNIFORM), // INDEX_ALPHA
+ };
+
+ private final IntArray mUnboundTextures = new IntArray();
+ private final IntArray mDeleteBuffers = new IntArray();
+
+ // Keep track of statistics for debugging
+ private int mCountDrawMesh = 0;
+ private int mCountTextureRect = 0;
+ private int mCountFillRect = 0;
+ private int mCountDrawLine = 0;
+
+ private int mNextTextureId = 1;
+
+ // Buffer for framebuffer IDs -- we keep track so we can switch the attached
+ // texture.
+ private int[] mFrameBuffer = new int[1];
+
+ // Bound textures.
+ private ArrayList<RawTexture> mTargetTextures = new ArrayList<RawTexture>();
+
+ // Temporary variables used within calculations
+ private final float[] mTempMatrix = new float[32];
+ private final float[] mTempColor = new float[4];
+ private final RectF mTempSourceRect = new RectF();
+ private final RectF mTempTargetRect = new RectF();
+ private final float[] mTempTextureMatrix = new float[MATRIX_SIZE];
+ private final int[] mTempIntArray = new int[1];
+
+ public GLES20Canvas() {
+ Matrix.setIdentityM(mTempTextureMatrix, 0);
+ Matrix.setIdentityM(mMatrices, mCurrentMatrixIndex);
+ mAlphas[mCurrentAlphaIndex] = 1f;
+ mTargetTextures.add(null);
+ }
+
+ @Override
+ public void initialize(GL11 gl) {
+ FloatBuffer boxBuffer = createBuffer(BOX_COORDINATES);
+ mBoxCoordinates = uploadBuffer(boxBuffer);
+
+ int drawVertexShader = loadShader(GLES20.GL_VERTEX_SHADER, DRAW_VERTEX_SHADER);
+ int textureVertexShader = loadShader(GLES20.GL_VERTEX_SHADER, TEXTURE_VERTEX_SHADER);
+ int meshVertexShader = loadShader(GLES20.GL_VERTEX_SHADER, MESH_VERTEX_SHADER);
+ int drawFragmentShader = loadShader(GLES20.GL_FRAGMENT_SHADER, DRAW_FRAGMENT_SHADER);
+ int textureFragmentShader = loadShader(GLES20.GL_FRAGMENT_SHADER, TEXTURE_FRAGMENT_SHADER);
+ int oesTextureFragmentShader = loadShader(GLES20.GL_FRAGMENT_SHADER,
+ OES_TEXTURE_FRAGMENT_SHADER);
+
+ mDrawProgram = assembleProgram(drawVertexShader, drawFragmentShader, mDrawParameters);
+ mTextureProgram = assembleProgram(textureVertexShader, textureFragmentShader,
+ mTextureParameters);
+ mOesTextureProgram = assembleProgram(textureVertexShader, oesTextureFragmentShader,
+ mOesTextureParameters);
+ mMeshProgram = assembleProgram(meshVertexShader, textureFragmentShader, mMeshParameters);
+
+ mBlendings.clear();
+ mBlendings.add(null);
+ setBlending(Blending.Mix);
+ }
+
+ private static FloatBuffer createBuffer(float[] values) {
+ // First create an nio buffer, then create a VBO from it.
+ int size = values.length * FLOAT_SIZE;
+ FloatBuffer buffer = ByteBuffer.allocateDirect(size).order(ByteOrder.nativeOrder())
+ .asFloatBuffer();
+ buffer.put(values, 0, values.length).position(0);
+ return buffer;
+ }
+
+ private int assembleProgram(int vertexShader, int fragmentShader, ShaderParameter[] params) {
+ int program = GLES20.glCreateProgram();
+ checkError();
+ if (program == 0) {
+ throw new RuntimeException("Cannot create GL program: " + GLES20.glGetError());
+ }
+ GLES20.glAttachShader(program, vertexShader);
+ checkError();
+ GLES20.glAttachShader(program, fragmentShader);
+ checkError();
+ GLES20.glLinkProgram(program);
+ checkError();
+ int[] mLinkStatus = mTempIntArray;
+ GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, mLinkStatus, 0);
+ if (mLinkStatus[0] != GLES20.GL_TRUE) {
+ Log.e(TAG, "Could not link program: ");
+ Log.e(TAG, GLES20.glGetProgramInfoLog(program));
+ GLES20.glDeleteProgram(program);
+ program = 0;
+ }
+ for (int i = 0; i < params.length; i++) {
+ params[i].loadHandle(program);
+ }
+ return program;
+ }
+
+ private static int loadShader(int type, String shaderCode) {
+ // create a vertex shader type (GLES20.GL_VERTEX_SHADER)
+ // or a fragment shader type (GLES20.GL_FRAGMENT_SHADER)
+ int shader = GLES20.glCreateShader(type);
+
+ // add the source code to the shader and compile it
+ GLES20.glShaderSource(shader, shaderCode);
+ checkError();
+ GLES20.glCompileShader(shader);
+ checkError();
+
+ return shader;
+ }
+
+ @Override
+ public void setSize(int width, int height) {
+ mWidth = width;
+ mHeight = height;
+ GLES20.glViewport(0, 0, mWidth, mHeight);
+ checkError();
+ Matrix.setIdentityM(mMatrices, mCurrentMatrixIndex);
+ Matrix.orthoM(mProjectionMatrix, 0, 0, width, 0, height, -1, 1);
+ if (getTargetTexture() == null) {
+ mScreenWidth = width;
+ mScreenHeight = height;
+ Matrix.translateM(mMatrices, mCurrentMatrixIndex, 0, height, 0);
+ Matrix.scaleM(mMatrices, mCurrentMatrixIndex, 1, -1, 1);
+ }
+ }
+
+ @Override
+ public void clearBuffer() {
+ GLES20.glClearColor(0f, 0f, 0f, 1f);
+ checkError();
+ GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
+ checkError();
+ }
+
+ @Override
+ public void clearBuffer(float[] argb) {
+ GLES20.glClearColor(argb[1], argb[2], argb[3], argb[0]);
+ checkError();
+ GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
+ checkError();
+ }
+
+ @Override
+ public float getAlpha() {
+ return mAlphas[mCurrentAlphaIndex];
+ }
+
+ @Override
+ public void setAlpha(float alpha) {
+ mAlphas[mCurrentAlphaIndex] = alpha;
+ }
+
+ @Override
+ public void multiplyAlpha(float alpha) {
+ setAlpha(getAlpha() * alpha);
+ }
+
+ @Override
+ public void translate(float x, float y, float z) {
+ Matrix.translateM(mMatrices, mCurrentMatrixIndex, x, y, z);
+ }
+
+ // This is a faster version of translate(x, y, z) because
+ // (1) we knows z = 0, (2) we inline the Matrix.translateM call,
+ // (3) we unroll the loop
+ @Override
+ public void translate(float x, float y) {
+ int index = mCurrentMatrixIndex;
+ float[] m = mMatrices;
+ m[index + 12] += m[index + 0] * x + m[index + 4] * y;
+ m[index + 13] += m[index + 1] * x + m[index + 5] * y;
+ m[index + 14] += m[index + 2] * x + m[index + 6] * y;
+ m[index + 15] += m[index + 3] * x + m[index + 7] * y;
+ }
+
+ @Override
+ public void scale(float sx, float sy, float sz) {
+ Matrix.scaleM(mMatrices, mCurrentMatrixIndex, sx, sy, sz);
+ }
+
+ @Override
+ public void rotate(float angle, float x, float y, float z) {
+ if (angle == 0f) {
+ return;
+ }
+ float[] temp = mTempMatrix;
+ Matrix.setRotateM(temp, 0, angle, x, y, z);
+ float[] matrix = mMatrices;
+ int index = mCurrentMatrixIndex;
+ Matrix.multiplyMM(temp, MATRIX_SIZE, matrix, index, temp, 0);
+ System.arraycopy(temp, MATRIX_SIZE, matrix, index, MATRIX_SIZE);
+ }
+
+ @Override
+ public void multiplyMatrix(float[] matrix, int offset) {
+ float[] temp = mTempMatrix;
+ float[] currentMatrix = mMatrices;
+ int index = mCurrentMatrixIndex;
+ Matrix.multiplyMM(temp, 0, currentMatrix, index, matrix, offset);
+ System.arraycopy(temp, 0, currentMatrix, index, 16);
+ }
+
+ @Override
+ public void save() {
+ save(SAVE_FLAG_ALL);
+ }
+
+ @Override
+ public void save(int saveFlags) {
+ boolean saveAlpha = (saveFlags & SAVE_FLAG_ALPHA) == SAVE_FLAG_ALPHA;
+ if (saveAlpha) {
+ float currentAlpha = getAlpha();
+ mCurrentAlphaIndex++;
+ if (mAlphas.length <= mCurrentAlphaIndex) {
+ mAlphas = Arrays.copyOf(mAlphas, mAlphas.length * 2);
+ }
+ mAlphas[mCurrentAlphaIndex] = currentAlpha;
+ }
+ boolean saveMatrix = (saveFlags & SAVE_FLAG_MATRIX) == SAVE_FLAG_MATRIX;
+ if (saveMatrix) {
+ int currentIndex = mCurrentMatrixIndex;
+ mCurrentMatrixIndex += MATRIX_SIZE;
+ if (mMatrices.length <= mCurrentMatrixIndex) {
+ mMatrices = Arrays.copyOf(mMatrices, mMatrices.length * 2);
+ }
+ System.arraycopy(mMatrices, currentIndex, mMatrices, mCurrentMatrixIndex, MATRIX_SIZE);
+ }
+ boolean saveBlending = (saveFlags & SAVE_FLAG_BLEND) == SAVE_FLAG_BLEND;
+ if (saveBlending) {
+ mBlendings.add(mBlendings.get(mBlendings.size() - 1));
+ }
+ mSaveFlags.add(saveFlags);
+ }
+
+ @Override
+ public void restore() {
+ int restoreFlags = mSaveFlags.removeLast();
+ boolean restoreAlpha = (restoreFlags & SAVE_FLAG_ALPHA) == SAVE_FLAG_ALPHA;
+ if (restoreAlpha) {
+ mCurrentAlphaIndex--;
+ }
+ boolean restoreMatrix = (restoreFlags & SAVE_FLAG_MATRIX) == SAVE_FLAG_MATRIX;
+ if (restoreMatrix) {
+ mCurrentMatrixIndex -= MATRIX_SIZE;
+ }
+ boolean restoreBlending = (restoreFlags & SAVE_FLAG_BLEND) == SAVE_FLAG_BLEND;
+ if (restoreBlending) {
+ setBlending(mBlendings.get(mBlendings.size() - 2));
+ mBlendings.remove(mBlendings.size() - 1);
+ }
+ }
+
+ @Override
+ public void drawLine(float x1, float y1, float x2, float y2, GLPaint paint) {
+ draw(GLES20.GL_LINE_STRIP, OFFSET_DRAW_LINE, COUNT_LINE_VERTEX, x1, y1, x2 - x1, y2 - y1,
+ paint);
+ mCountDrawLine++;
+ }
+
+ @Override
+ public void drawRect(float x, float y, float width, float height, GLPaint paint) {
+ draw(GLES20.GL_LINE_LOOP, OFFSET_DRAW_RECT, COUNT_RECT_VERTEX, x, y, width, height, paint);
+ mCountDrawLine++;
+ }
+
+ private void draw(int type, int offset, int count, float x, float y, float width, float height,
+ GLPaint paint) {
+ draw(type, offset, count, x, y, width, height, paint.getColor(), paint.getLineWidth());
+ }
+
+ private void draw(int type, int offset, int count, float x, float y, float width, float height,
+ int color, float lineWidth) {
+ prepareDraw(offset, color, lineWidth);
+ draw(mDrawParameters, type, count, x, y, width, height);
+ }
+
+ private void prepareDraw(int offset, int color, float lineWidth) {
+ GLES20.glUseProgram(mDrawProgram);
+ checkError();
+ if (lineWidth > 0) {
+ GLES20.glLineWidth(lineWidth);
+ checkError();
+ }
+ float[] colorArray = getColor(color);
+ boolean blendingEnabled = (colorArray[3] < 1f);
+ enableBlending(blendingEnabled);
+ if (blendingEnabled) {
+ GLES20.glBlendColor(colorArray[0], colorArray[1], colorArray[2], colorArray[3]);
+ checkError();
+ }
+
+ GLES20.glUniform4fv(mDrawParameters[INDEX_COLOR].handle, 1, colorArray, 0);
+ setPosition(mDrawParameters, offset);
+ checkError();
+ }
+
+ private float[] getColor(int color) {
+ float alpha = ((color >>> 24) & 0xFF) / 255f * getAlpha();
+ float red = ((color >>> 16) & 0xFF) / 255f * alpha;
+ float green = ((color >>> 8) & 0xFF) / 255f * alpha;
+ float blue = (color & 0xFF) / 255f * alpha;
+ mTempColor[0] = red;
+ mTempColor[1] = green;
+ mTempColor[2] = blue;
+ mTempColor[3] = alpha;
+ return mTempColor;
+ }
+
+ private void enableBlending(boolean enableBlending) {
+ if (enableBlending) {
+ GLES20.glEnable(GLES20.GL_BLEND);
+ checkError();
+ } else {
+ GLES20.glDisable(GLES20.GL_BLEND);
+ checkError();
+ }
+ }
+
+ private void setPosition(ShaderParameter[] params, int offset) {
+ GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, mBoxCoordinates);
+ checkError();
+ GLES20.glVertexAttribPointer(params[INDEX_POSITION].handle, COORDS_PER_VERTEX,
+ GLES20.GL_FLOAT, false, VERTEX_STRIDE, offset * VERTEX_STRIDE);
+ checkError();
+ }
+
+ private void draw(ShaderParameter[] params, int type, int count, float x, float y, float width,
+ float height) {
+ setMatrix(params, x, y, width, height);
+ int positionHandle = params[INDEX_POSITION].handle;
+ GLES20.glEnableVertexAttribArray(positionHandle);
+ checkError();
+ GLES20.glDrawArrays(type, 0, count);
+ checkError();
+ GLES20.glDisableVertexAttribArray(positionHandle);
+ checkError();
+ }
+
+ private void setMatrix(ShaderParameter[] params, float x, float y, float width, float height) {
+ Matrix.translateM(mTempMatrix, 0, mMatrices, mCurrentMatrixIndex, x, y, 0f);
+ Matrix.scaleM(mTempMatrix, 0, width, height, 1f);
+ Matrix.multiplyMM(mTempMatrix, MATRIX_SIZE, mProjectionMatrix, 0, mTempMatrix, 0);
+ GLES20.glUniformMatrix4fv(params[INDEX_MATRIX].handle, 1, false, mTempMatrix, MATRIX_SIZE);
+ checkError();
+ }
+
+ @Override
+ public void fillRect(float x, float y, float width, float height, int color) {
+ draw(GLES20.GL_TRIANGLE_STRIP, OFFSET_FILL_RECT, COUNT_FILL_VERTEX, x, y, width, height,
+ color, 0f);
+ mCountFillRect++;
+ }
+
+ @Override
+ public void drawTexture(BasicTexture texture, int x, int y, int width, int height) {
+ if (width <= 0 || height <= 0) {
+ return;
+ }
+ copyTextureCoordinates(texture, mTempSourceRect);
+ mTempTargetRect.set(x, y, x + width, y + height);
+ convertCoordinate(mTempSourceRect, mTempTargetRect, texture);
+ drawTextureRect(texture, mTempSourceRect, mTempTargetRect);
+ }
+
+ private static void copyTextureCoordinates(BasicTexture texture, RectF outRect) {
+ int left = 0;
+ int top = 0;
+ int right = texture.getWidth();
+ int bottom = texture.getHeight();
+ if (texture.hasBorder()) {
+ left = 1;
+ top = 1;
+ right -= 1;
+ bottom -= 1;
+ }
+ outRect.set(left, top, right, bottom);
+ }
+
+ @Override
+ public void drawTexture(BasicTexture texture, RectF source, RectF target) {
+ if (target.width() <= 0 || target.height() <= 0) {
+ return;
+ }
+ mTempSourceRect.set(source);
+ mTempTargetRect.set(target);
+
+ convertCoordinate(mTempSourceRect, mTempTargetRect, texture);
+ drawTextureRect(texture, mTempSourceRect, mTempTargetRect);
+ }
+
+ @Override
+ public void drawTexture(BasicTexture texture, float[] textureTransform, int x, int y, int w,
+ int h) {
+ if (w <= 0 || h <= 0) {
+ return;
+ }
+ mTempTargetRect.set(x, y, x + w, y + h);
+ drawTextureRect(texture, textureTransform, mTempTargetRect);
+ }
+
+ private void drawTextureRect(BasicTexture texture, RectF source, RectF target) {
+ setTextureMatrix(source);
+ drawTextureRect(texture, mTempTextureMatrix, target);
+ }
+
+ private void setTextureMatrix(RectF source) {
+ mTempTextureMatrix[0] = source.width();
+ mTempTextureMatrix[5] = source.height();
+ mTempTextureMatrix[12] = source.left;
+ mTempTextureMatrix[13] = source.top;
+ }
+
+ // This function changes the source coordinate to the texture coordinates.
+ // It also clips the source and target coordinates if it is beyond the
+ // bound of the texture.
+ private static void convertCoordinate(RectF source, RectF target, BasicTexture texture) {
+ int width = texture.getWidth();
+ int height = texture.getHeight();
+ int texWidth = texture.getTextureWidth();
+ int texHeight = texture.getTextureHeight();
+ // Convert to texture coordinates
+ source.left /= texWidth;
+ source.right /= texWidth;
+ source.top /= texHeight;
+ source.bottom /= texHeight;
+
+ // Clip if the rendering range is beyond the bound of the texture.
+ float xBound = (float) width / texWidth;
+ if (source.right > xBound) {
+ target.right = target.left + target.width() * (xBound - source.left) / source.width();
+ source.right = xBound;
+ }
+ float yBound = (float) height / texHeight;
+ if (source.bottom > yBound) {
+ target.bottom = target.top + target.height() * (yBound - source.top) / source.height();
+ source.bottom = yBound;
+ }
+ }
+
+ private void drawTextureRect(BasicTexture texture, float[] textureMatrix, RectF target) {
+ ShaderParameter[] params = prepareTexture(texture);
+ setPosition(params, OFFSET_FILL_RECT);
+ GLES20.glUniformMatrix4fv(params[INDEX_TEXTURE_MATRIX].handle, 1, false, textureMatrix, 0);
+ checkError();
+ draw(params, GLES20.GL_TRIANGLE_STRIP, COUNT_FILL_VERTEX, target.left, target.top,
+ target.width(), target.height());
+ mCountTextureRect++;
+ }
+
+ private ShaderParameter[] prepareTexture(BasicTexture texture) {
+ ShaderParameter[] params;
+ int program;
+ if (texture.getTarget() == GLES20.GL_TEXTURE_2D) {
+ params = mTextureParameters;
+ program = mTextureProgram;
+ } else {
+ params = mOesTextureParameters;
+ program = mOesTextureProgram;
+ }
+ prepareTexture(texture, program, params);
+ return params;
+ }
+
+ private void prepareTexture(BasicTexture texture, int program, ShaderParameter[] params) {
+ GLES20.glUseProgram(program);
+ checkError();
+ enableBlending(!texture.isOpaque() || getAlpha() < OPAQUE_ALPHA);
+ GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
+ checkError();
+ texture.onBind(this);
+ GLES20.glBindTexture(texture.getTarget(), texture.getId());
+ checkError();
+ GLES20.glUniform1i(params[INDEX_TEXTURE_SAMPLER].handle, 0);
+ checkError();
+ GLES20.glUniform1f(params[INDEX_ALPHA].handle, getAlpha());
+ checkError();
+ }
+
+ @Override
+ public void drawMesh(BasicTexture texture, int x, int y, int xyBuffer, int uvBuffer,
+ int indexBuffer, int indexCount) {
+ prepareTexture(texture, mMeshProgram, mMeshParameters);
+
+ GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
+ checkError();
+
+ GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, xyBuffer);
+ checkError();
+ int positionHandle = mMeshParameters[INDEX_POSITION].handle;
+ GLES20.glVertexAttribPointer(positionHandle, COORDS_PER_VERTEX, GLES20.GL_FLOAT, false,
+ VERTEX_STRIDE, 0);
+ checkError();
+
+ GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, uvBuffer);
+ checkError();
+ int texCoordHandle = mMeshParameters[INDEX_TEXTURE_COORD].handle;
+ GLES20.glVertexAttribPointer(texCoordHandle, COORDS_PER_VERTEX, GLES20.GL_FLOAT,
+ false, VERTEX_STRIDE, 0);
+ checkError();
+
+ GLES20.glEnableVertexAttribArray(positionHandle);
+ checkError();
+ GLES20.glEnableVertexAttribArray(texCoordHandle);
+ checkError();
+
+ setMatrix(mMeshParameters, x, y, 1, 1);
+ GLES20.glDrawElements(GLES20.GL_TRIANGLE_STRIP, indexCount, GLES20.GL_UNSIGNED_BYTE, 0);
+ checkError();
+
+ GLES20.glDisableVertexAttribArray(positionHandle);
+ checkError();
+ GLES20.glDisableVertexAttribArray(texCoordHandle);
+ checkError();
+ GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, 0);
+ checkError();
+ mCountDrawMesh++;
+ }
+
+ @Override
+ public void drawMixed(BasicTexture texture, int toColor, float ratio, int x, int y, int w, int h) {
+ copyTextureCoordinates(texture, mTempSourceRect);
+ mTempTargetRect.set(x, y, x + w, y + h);
+ drawMixed(texture, toColor, ratio, mTempSourceRect, mTempTargetRect);
+ }
+
+ @Override
+ public void drawMixed(BasicTexture texture, int toColor, float ratio, RectF source, RectF target) {
+ if (target.width() <= 0 || target.height() <= 0) {
+ return;
+ }
+ save(SAVE_FLAG_ALPHA);
+
+ float currentAlpha = getAlpha();
+ float cappedRatio = Math.min(1f, Math.max(0f, ratio));
+
+ float textureAlpha = (1f - cappedRatio) * currentAlpha;
+ setAlpha(textureAlpha);
+ drawTexture(texture, source, target);
+
+ float colorAlpha = cappedRatio * currentAlpha;
+ setAlpha(colorAlpha);
+ fillRect(target.left, target.top, target.width(), target.height(), toColor);
+
+ restore();
+ }
+
+ @Override
+ public boolean unloadTexture(BasicTexture texture) {
+ boolean unload = texture.isLoaded();
+ if (unload) {
+ synchronized (mUnboundTextures) {
+ mUnboundTextures.add(texture.getId());
+ }
+ }
+ return unload;
+ }
+
+ @Override
+ public void deleteBuffer(int bufferId) {
+ synchronized (mUnboundTextures) {
+ mDeleteBuffers.add(bufferId);
+ }
+ }
+
+ @Override
+ public void deleteRecycledResources() {
+ synchronized (mUnboundTextures) {
+ IntArray ids = mUnboundTextures;
+ if (mUnboundTextures.size() > 0) {
+ glDeleteTextures(null, ids.size(), ids.getInternalArray(), 0);
+ ids.clear();
+ }
+
+ ids = mDeleteBuffers;
+ if (ids.size() > 0) {
+ glDeleteBuffers(null, ids.size(), ids.getInternalArray(), 0);
+ ids.clear();
+ }
+ }
+ }
+
+ @Override
+ public void dumpStatisticsAndClear() {
+ String line = String.format("MESH:%d, TEX_RECT:%d, FILL_RECT:%d, LINE:%d", mCountDrawMesh,
+ mCountTextureRect, mCountFillRect, mCountDrawLine);
+ mCountDrawMesh = 0;
+ mCountTextureRect = 0;
+ mCountFillRect = 0;
+ mCountDrawLine = 0;
+ Log.d(TAG, line);
+ }
+
+ @Override
+ public void endRenderTarget() {
+ RawTexture oldTexture = mTargetTextures.remove(mTargetTextures.size() - 1);
+ RawTexture texture = getTargetTexture();
+ setRenderTarget(oldTexture, texture);
+ restore(); // restore matrix and alpha
+ }
+
+ @Override
+ public void beginRenderTarget(RawTexture texture) {
+ save(); // save matrix and alpha and blending
+ RawTexture oldTexture = getTargetTexture();
+ mTargetTextures.add(texture);
+ setRenderTarget(oldTexture, texture);
+ }
+
+ private RawTexture getTargetTexture() {
+ return mTargetTextures.get(mTargetTextures.size() - 1);
+ }
+
+ private void setRenderTarget(BasicTexture oldTexture, RawTexture texture) {
+ if (oldTexture == null && texture != null) {
+ GLES20.glGenFramebuffers(1, mFrameBuffer, 0);
+ checkError();
+ GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, mFrameBuffer[0]);
+ checkError();
+ } else if (oldTexture != null && texture == null) {
+ GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
+ checkError();
+ GLES20.glDeleteFramebuffers(1, mFrameBuffer, 0);
+ checkError();
+ }
+
+ if (texture == null) {
+ setSize(mScreenWidth, mScreenHeight);
+ } else {
+ setSize(texture.getWidth(), texture.getHeight());
+
+ if (!texture.isLoaded()) {
+ texture.prepare(this);
+ }
+
+ GLES20.glFramebufferTexture2D(GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0,
+ texture.getTarget(), texture.getId(), 0);
+ checkError();
+
+ checkFramebufferStatus();
+ }
+ }
+
+ private static void checkFramebufferStatus() {
+ int status = GLES20.glCheckFramebufferStatus(GLES20.GL_FRAMEBUFFER);
+ if (status != GLES20.GL_FRAMEBUFFER_COMPLETE) {
+ String msg = "";
+ switch (status) {
+ case GLES20.GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
+ msg = "GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT";
+ break;
+ case GLES20.GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
+ msg = "GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS";
+ break;
+ case GLES20.GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
+ msg = "GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT";
+ break;
+ case GLES20.GL_FRAMEBUFFER_UNSUPPORTED:
+ msg = "GL_FRAMEBUFFER_UNSUPPORTED";
+ break;
+ }
+ throw new RuntimeException(msg + ":" + Integer.toHexString(status));
+ }
+ }
+
+ @Override
+ public void setTextureParameters(BasicTexture texture) {
+ int target = texture.getTarget();
+ GLES20.glBindTexture(target, texture.getId());
+ checkError();
+ GLES20.glTexParameteri(target, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
+ GLES20.glTexParameteri(target, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);
+ GLES20.glTexParameterf(target, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
+ GLES20.glTexParameterf(target, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
+ }
+
+ @Override
+ public void initializeTextureSize(BasicTexture texture, int format, int type) {
+ int target = texture.getTarget();
+ GLES20.glBindTexture(target, texture.getId());
+ checkError();
+ int width = texture.getTextureWidth();
+ int height = texture.getTextureHeight();
+ GLES20.glTexImage2D(target, 0, format, width, height, 0, format, type, null);
+ }
+
+ @Override
+ public void initializeTexture(BasicTexture texture, Bitmap bitmap) {
+ int target = texture.getTarget();
+ GLES20.glBindTexture(target, texture.getId());
+ checkError();
+ GLUtils.texImage2D(target, 0, bitmap, 0);
+ }
+
+ @Override
+ public void texSubImage2D(BasicTexture texture, int xOffset, int yOffset, Bitmap bitmap,
+ int format, int type) {
+ int target = texture.getTarget();
+ GLES20.glBindTexture(target, texture.getId());
+ checkError();
+ GLUtils.texSubImage2D(target, 0, xOffset, yOffset, bitmap, format, type);
+ }
+
+ @Override
+ public int uploadBuffer(FloatBuffer buf) {
+ return uploadBuffer(buf, FLOAT_SIZE);
+ }
+
+ @Override
+ public int uploadBuffer(ByteBuffer buf) {
+ return uploadBuffer(buf, 1);
+ }
+
+ private int uploadBuffer(Buffer buffer, int elementSize) {
+ glGenBuffers(1, mTempIntArray, 0);
+ checkError();
+ int bufferId = mTempIntArray[0];
+ GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, bufferId);
+ checkError();
+ GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER, buffer.capacity() * elementSize, buffer,
+ GLES20.GL_STATIC_DRAW);
+ checkError();
+ return bufferId;
+ }
+
+ @Override
+ public void setBlending(Blending blending) {
+ Blending currentBlending = mBlendings.get(mBlendings.size() - 1);
+ if (currentBlending == blending) {
+ return; // nothing to change
+ }
+ mBlendings.set(mBlendings.size() - 1, blending);
+ int srcFunc = GLES20.GL_ONE;
+ int dstFunc;
+ switch (blending) {
+ case Additive:
+ dstFunc = GLES20.GL_ONE;
+ break;
+ case Mix:
+ dstFunc = GLES20.GL_ONE_MINUS_SRC_ALPHA;
+ break;
+ default:
+ Utils.fail("Unknown blend: " + blending);
+ dstFunc = GLES20.GL_ONE_MINUS_SRC_ALPHA;
+ break;
+ }
+ GLES20.glBlendFunc(srcFunc, dstFunc);
+ checkError();
+ }
+
+ @Override
+ public int generateTexture() {
+ // Can use anything as a lock. No need to create a new object.
+ synchronized (mTempIntArray) {
+ return mNextTextureId++;
+ }
+ }
+
+ @Override
+ public void glGenBuffers(int n, int[] buffers, int offset) {
+ GLES20.glGenBuffers(n, buffers, offset);
+ checkError();
+ }
+
+ @Override
+ public void glDeleteTextures(GL11 gl, int n, int[] textures, int offset) {
+ GLES20.glDeleteTextures(n, textures, offset);
+ checkError();
+ }
+
+ @Override
+ public void glDeleteBuffers(GL11 gl, int n, int[] buffers, int offset) {
+ GLES20.glDeleteBuffers(n, buffers, offset);
+ checkError();
+ }
+
+ @Override
+ public void glDeleteFramebuffers(GL11ExtensionPack gl11ep, int n, int[] buffers, int offset) {
+ GLES20.glDeleteFramebuffers(n, buffers, offset);
+ checkError();
+ }
+
+ @Override
+ public void enableStencil() {
+ GLES20.glEnable(GLES20.GL_STENCIL_TEST);
+ }
+
+ @Override
+ public void disableStencil() {
+ GLES20.glDisable(GLES20.GL_STENCIL_TEST);
+ }
+
+ @Override
+ public void clearStencilBuffer() {
+ GLES20.glClear(GLES20.GL_STENCIL_BUFFER_BIT);
+ }
+
+ @Override
+ public void updateStencil(boolean update) {
+ int passOp = update ? GLES20.GL_REPLACE : GLES20.GL_KEEP;
+ GLES20.glStencilOp(GLES20.GL_KEEP, GLES20.GL_KEEP, passOp);
+ }
+
+ @Override
+ public void drawOnlyOutsideStencil(boolean onlyOutside) {
+ int func = onlyOutside ? GLES20.GL_NOTEQUAL : GLES20.GL_ALWAYS;
+ GLES20.glStencilFunc(func, 1, 1);
+ }
+
+ private static void checkError() {
+ int error = GLES20.glGetError();
+ if (error != 0) {
+ Throwable t = new Throwable();
+ Log.e(TAG, "GL error: " + error, t);
+ }
+ }
+
+ @SuppressWarnings("unused")
+ private static void printMatrix(String message, float[] m, int offset) {
+ StringBuilder b = new StringBuilder(message);
+ for (int i = 0; i < MATRIX_SIZE; i++) {
+ b.append(' ');
+ if (i % 4 == 0) {
+ b.append('\n');
+ }
+ b.append(m[offset + i]);
+ }
+ Log.v(TAG, b.toString());
+ }
+
+}
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