1104c45677660586026a7e74ef8c47d396403d50eMichael Jurka/* 2104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * Copyright (C) 2010 The Android Open Source Project 3104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * 4104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * Licensed under the Apache License, Version 2.0 (the "License"); 5104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * you may not use this file except in compliance with the License. 6104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * You may obtain a copy of the License at 7104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * 8104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * http://www.apache.org/licenses/LICENSE-2.0 9104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * 10104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * Unless required by applicable law or agreed to in writing, software 11104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * distributed under the License is distributed on an "AS IS" BASIS, 12104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * See the License for the specific language governing permissions and 14104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * limitations under the License. 15104c45677660586026a7e74ef8c47d396403d50eMichael Jurka */ 16104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 17104c45677660586026a7e74ef8c47d396403d50eMichael Jurkapackage com.android.gallery3d.glrenderer; 18104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 19104c45677660586026a7e74ef8c47d396403d50eMichael Jurkaimport android.graphics.Bitmap; 20104c45677660586026a7e74ef8c47d396403d50eMichael Jurkaimport android.graphics.Rect; 21104c45677660586026a7e74ef8c47d396403d50eMichael Jurkaimport android.graphics.RectF; 22104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 23104c45677660586026a7e74ef8c47d396403d50eMichael Jurka// 24104c45677660586026a7e74ef8c47d396403d50eMichael Jurka// GLCanvas gives a convenient interface to draw using OpenGL. 25104c45677660586026a7e74ef8c47d396403d50eMichael Jurka// 26104c45677660586026a7e74ef8c47d396403d50eMichael Jurka// When a rectangle is specified in this interface, it means the region 27104c45677660586026a7e74ef8c47d396403d50eMichael Jurka// [x, x+width) * [y, y+height) 28104c45677660586026a7e74ef8c47d396403d50eMichael Jurka// 29104c45677660586026a7e74ef8c47d396403d50eMichael Jurkapublic interface GLCanvas { 30104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 31104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public GLId getGLId(); 32104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 33104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Tells GLCanvas the size of the underlying GL surface. This should be 34104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // called before first drawing and when the size of GL surface is changed. 35104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // This is called by GLRoot and should not be called by the clients 36104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // who only want to draw on the GLCanvas. Both width and height must be 37104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // nonnegative. 38104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void setSize(int width, int height); 39104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 40104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Clear the drawing buffers. This should only be used by GLRoot. 41104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void clearBuffer(); 42104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 43104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void clearBuffer(float[] argb); 44104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 45104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Sets and gets the current alpha, alpha must be in [0, 1]. 46104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void setAlpha(float alpha); 47104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 48104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract float getAlpha(); 49104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 50104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // (current alpha) = (current alpha) * alpha 51104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void multiplyAlpha(float alpha); 52104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 53104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Change the current transform matrix. 54104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void translate(float x, float y, float z); 55104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 56104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void translate(float x, float y); 57104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 58104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void scale(float sx, float sy, float sz); 59104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 60104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void rotate(float angle, float x, float y, float z); 61104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 62104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void multiplyMatrix(float[] mMatrix, int offset); 63104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 64104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Pushes the configuration state (matrix, and alpha) onto 65104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // a private stack. 66104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void save(); 67104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 68104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Same as save(), but only save those specified in saveFlags. 69104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void save(int saveFlags); 70104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 71104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public static final int SAVE_FLAG_ALL = 0xFFFFFFFF; 72104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public static final int SAVE_FLAG_ALPHA = 0x01; 73104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public static final int SAVE_FLAG_MATRIX = 0x02; 74104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 75104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Pops from the top of the stack as current configuration state (matrix, 76104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // alpha, and clip). This call balances a previous call to save(), and is 77104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // used to remove all modifications to the configuration state since the 78104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // last save call. 79104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void restore(); 80104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 81104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Draws a line using the specified paint from (x1, y1) to (x2, y2). 82104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // (Both end points are included). 83104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void drawLine(float x1, float y1, float x2, float y2, GLPaint paint); 84104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 85104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Draws a rectangle using the specified paint from (x1, y1) to (x2, y2). 86104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // (Both end points are included). 87104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void drawRect(float x1, float y1, float x2, float y2, GLPaint paint); 88104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 89104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Fills the specified rectangle with the specified color. 90104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void fillRect(float x, float y, float width, float height, int color); 91104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 92104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Draws a texture to the specified rectangle. 93104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void drawTexture( 94104c45677660586026a7e74ef8c47d396403d50eMichael Jurka BasicTexture texture, int x, int y, int width, int height); 95104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 96104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void drawMesh(BasicTexture tex, int x, int y, int xyBuffer, 97104c45677660586026a7e74ef8c47d396403d50eMichael Jurka int uvBuffer, int indexBuffer, int indexCount); 98104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 99104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Draws the source rectangle part of the texture to the target rectangle. 100104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void drawTexture(BasicTexture texture, RectF source, RectF target); 101104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 102104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Draw a texture with a specified texture transform. 103104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void drawTexture(BasicTexture texture, float[] mTextureTransform, 104104c45677660586026a7e74ef8c47d396403d50eMichael Jurka int x, int y, int w, int h); 105104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 106104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Draw two textures to the specified rectangle. The actual texture used is 107104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // from * (1 - ratio) + to * ratio 108104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // The two textures must have the same size. 109104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void drawMixed(BasicTexture from, int toColor, 110104c45677660586026a7e74ef8c47d396403d50eMichael Jurka float ratio, int x, int y, int w, int h); 111104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 112104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Draw a region of a texture and a specified color to the specified 113104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // rectangle. The actual color used is from * (1 - ratio) + to * ratio. 114104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // The region of the texture is defined by parameter "src". The target 115104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // rectangle is specified by parameter "target". 116104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void drawMixed(BasicTexture from, int toColor, 117104c45677660586026a7e74ef8c47d396403d50eMichael Jurka float ratio, RectF src, RectF target); 118104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 119104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Unloads the specified texture from the canvas. The resource allocated 120104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // to draw the texture will be released. The specified texture will return 121104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // to the unloaded state. This function should be called only from 122104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // BasicTexture or its descendant 123104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract boolean unloadTexture(BasicTexture texture); 124104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 125104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Delete the specified buffer object, similar to unloadTexture. 126104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void deleteBuffer(int bufferId); 127104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 128104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Delete the textures and buffers in GL side. This function should only be 129104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // called in the GL thread. 130104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void deleteRecycledResources(); 131104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 132104c45677660586026a7e74ef8c47d396403d50eMichael Jurka // Dump statistics information and clear the counters. For debug only. 133104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void dumpStatisticsAndClear(); 134104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 135104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void beginRenderTarget(RawTexture texture); 136104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 137104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void endRenderTarget(); 138104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 139104c45677660586026a7e74ef8c47d396403d50eMichael Jurka /** 140104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * Sets texture parameters to use GL_CLAMP_TO_EDGE for both 141104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * GL_TEXTURE_WRAP_S and GL_TEXTURE_WRAP_T. Sets texture parameters to be 142104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * GL_LINEAR for GL_TEXTURE_MIN_FILTER and GL_TEXTURE_MAG_FILTER. 143104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * bindTexture() must be called prior to this. 144104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * 145104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param texture The texture to set parameters on. 146104c45677660586026a7e74ef8c47d396403d50eMichael Jurka */ 147104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void setTextureParameters(BasicTexture texture); 148104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 149104c45677660586026a7e74ef8c47d396403d50eMichael Jurka /** 150104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * Initializes the texture to a size by calling texImage2D on it. 151104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * 152104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param texture The texture to initialize the size. 153104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param format The texture format (e.g. GL_RGBA) 154104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param type The texture type (e.g. GL_UNSIGNED_BYTE) 155104c45677660586026a7e74ef8c47d396403d50eMichael Jurka */ 156104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void initializeTextureSize(BasicTexture texture, int format, int type); 157104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 158104c45677660586026a7e74ef8c47d396403d50eMichael Jurka /** 159104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * Initializes the texture to a size by calling texImage2D on it. 160104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * 161104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param texture The texture to initialize the size. 162104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param bitmap The bitmap to initialize the bitmap with. 163104c45677660586026a7e74ef8c47d396403d50eMichael Jurka */ 164104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void initializeTexture(BasicTexture texture, Bitmap bitmap); 165104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 166104c45677660586026a7e74ef8c47d396403d50eMichael Jurka /** 167104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * Calls glTexSubImage2D to upload a bitmap to the texture. 168104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * 169104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param texture The target texture to write to. 170104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param xOffset Specifies a texel offset in the x direction within the 171104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * texture array. 172104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param yOffset Specifies a texel offset in the y direction within the 173104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * texture array. 174104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param format The texture format (e.g. GL_RGBA) 175104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param type The texture type (e.g. GL_UNSIGNED_BYTE) 176104c45677660586026a7e74ef8c47d396403d50eMichael Jurka */ 177104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void texSubImage2D(BasicTexture texture, int xOffset, int yOffset, 178104c45677660586026a7e74ef8c47d396403d50eMichael Jurka Bitmap bitmap, 179104c45677660586026a7e74ef8c47d396403d50eMichael Jurka int format, int type); 180104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 181104c45677660586026a7e74ef8c47d396403d50eMichael Jurka /** 182104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * Generates buffers and uploads the buffer data. 183104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * 184104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param buffer The buffer to upload 185104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @return The buffer ID that was generated. 186104c45677660586026a7e74ef8c47d396403d50eMichael Jurka */ 187104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract int uploadBuffer(java.nio.FloatBuffer buffer); 188104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 189104c45677660586026a7e74ef8c47d396403d50eMichael Jurka /** 190104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * Generates buffers and uploads the element array buffer data. 191104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * 192104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param buffer The buffer to upload 193104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @return The buffer ID that was generated. 194104c45677660586026a7e74ef8c47d396403d50eMichael Jurka */ 195104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract int uploadBuffer(java.nio.ByteBuffer buffer); 196104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 197104c45677660586026a7e74ef8c47d396403d50eMichael Jurka /** 198104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * After LightCycle makes GL calls, this method is called to restore the GL 199104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * configuration to the one expected by GLCanvas. 200104c45677660586026a7e74ef8c47d396403d50eMichael Jurka */ 201104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void recoverFromLightCycle(); 202104c45677660586026a7e74ef8c47d396403d50eMichael Jurka 203104c45677660586026a7e74ef8c47d396403d50eMichael Jurka /** 204104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * Gets the bounds given by x, y, width, and height as well as the internal 205104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * matrix state. There is no special handling for non-90-degree rotations. 206104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * It only considers the lower-left and upper-right corners as the bounds. 207104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * 208104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param bounds The output bounds to write to. 209104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param x The left side of the input rectangle. 210104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param y The bottom of the input rectangle. 211104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param width The width of the input rectangle. 212104c45677660586026a7e74ef8c47d396403d50eMichael Jurka * @param height The height of the input rectangle. 213104c45677660586026a7e74ef8c47d396403d50eMichael Jurka */ 214104c45677660586026a7e74ef8c47d396403d50eMichael Jurka public abstract void getBounds(Rect bounds, int x, int y, int width, int height); 215104c45677660586026a7e74ef8c47d396403d50eMichael Jurka} 216