/*
* 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.glrenderer;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.graphics.RectF;
import android.opengl.GLES20;
import android.opengl.GLUtils;
import android.opengl.Matrix;
import android.util.Log;
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;
public class GLES20Canvas implements GLCanvas {
// ************** 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 float[] BOUNDS_COORDINATES = {
0, 0, 0, 1,
1, 1, 0, 1,
};
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 *= " + 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 *= " + 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 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;
// 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];
private static final GLId mGLId = new GLES20IdImpl();
public GLES20Canvas() {
Matrix.setIdentityM(mTempTextureMatrix, 0);
Matrix.setIdentityM(mMatrices, mCurrentMatrixIndex);
mAlphas[mCurrentAlphaIndex] = 1f;
mTargetTextures.add(null);
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);
GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA);
checkError();
}
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);
}
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;
}
}
@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();
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 0);
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();
if (texture.isFlippedVertically()) {
save(SAVE_FLAG_MATRIX);
translate(0, target.centerY());
scale(1, -1, 1);
translate(0, -target.centerY());
}
draw(params, GLES20.GL_TRIANGLE_STRIP, COUNT_FILL_VERTEX, target.left, target.top,
target.width(), target.height());
if (texture.isFlippedVertically()) {
restore();
}
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.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 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) {
mGLId.glDeleteTextures(null, ids.size(), ids.getInternalArray(), 0);
ids.clear();
}
ids = mDeleteBuffers;
if (ids.size() > 0) {
mGLId.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) {
mGLId.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;
}
public 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());
}
@Override
public void recoverFromLightCycle() {
GLES20.glViewport(0, 0, mWidth, mHeight);
GLES20.glDisable(GLES20.GL_DEPTH_TEST);
GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA);
checkError();
}
@Override
public void getBounds(Rect bounds, int x, int y, int width, int height) {
Matrix.translateM(mTempMatrix, 0, mMatrices, mCurrentMatrixIndex, x, y, 0f);
Matrix.scaleM(mTempMatrix, 0, width, height, 1f);
Matrix.multiplyMV(mTempMatrix, MATRIX_SIZE, mTempMatrix, 0, BOUNDS_COORDINATES, 0);
Matrix.multiplyMV(mTempMatrix, MATRIX_SIZE + 4, mTempMatrix, 0, BOUNDS_COORDINATES, 4);
bounds.left = Math.round(mTempMatrix[MATRIX_SIZE]);
bounds.right = Math.round(mTempMatrix[MATRIX_SIZE + 4]);
bounds.top = Math.round(mTempMatrix[MATRIX_SIZE + 1]);
bounds.bottom = Math.round(mTempMatrix[MATRIX_SIZE + 5]);
bounds.sort();
}
@Override
public GLId getGLId() {
return mGLId;
}
}
|
