1 // Copyright 2003 Adam Megacz, see the COPYING file for licensing [LGPL]
2 // Author: Brian Alliet
8 abstract class OpenGL {
9 static final boolean pretendToBeACrappyVideoCard = false;
10 boolean rectangularTextures;
11 boolean hasRectangularTextures() { return rectangularTextures; }
19 private native void natInit();
21 private static float parseVersion(String s) {
22 int end = s.indexOf(' ');
23 if(end < 0) end = s.length();
25 return Float.parseFloat(s.substring(0,end));
26 } catch(NumberFormatException e) {
27 return 1.1f; // just a guess
31 // This MUST be called after OpenGL is instansiated (and activateSharedContext is functioning)
32 public void init() throws NotSupportedException {
34 glVersion = parseVersion(version);
35 if(glVersion < 1.1) throw new NotSupportedException("OpenGL 1.1 or greater is required. (you have: " + version +" - " + glVersion + ")");
36 if(pretendToBeACrappyVideoCard) {
39 rectangularTextures = false;
41 Log.log(this,"Renderer: " + renderer);
42 Log.log(this,"Version: " + version);
43 Log.log(this,"Vendor: " + vendor);
44 Log.log(this,"Rectangular textures: " + (rectangularTextures ? "supported" : "unsupported"));
45 Log.log(this,"Max texture size: " + maxTexSize);
46 Log.log(this,"Max rectangular texture size: " + maxRectTexSize);
49 protected abstract void activateSharedContext();
51 public static class NotSupportedException extends Exception {
52 public NotSupportedException(String s) { super(s); }
55 public static abstract class GLPixelBuffer extends PixelBuffer {
58 public int getWidth() { return width; }
59 public int getHeight() { return height; }
61 private boolean glScissorEnabled = false;
63 public GLPixelBuffer(int width, int height) {
68 // This should activate the drawing context and prepare the double buffer for drawing
69 protected abstract void activateContext();
71 protected static native void drawableInit(int w, int h);
73 private static native void setColor(int color);
75 public native void setClip(int x, int y, int x2, int y2);
76 public native void resetClip();
77 public native void fillTrapezoid(int x1, int x2, int y1, int x3, int x4, int y2, int color);
79 public void drawString(String font, String text, int x, int y, int color) {
80 //System.out.println("drawString(): " + text);
83 //public native void drawPictureAlphaOnly(Picture source, int dx1, int dy1, int dx2, int dy2,
84 //int sx1, int sy1, int sx2, int sy2, int rgb);
85 public void drawPictureAlphaOnly(Picture source, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, int rgb) {
86 drawPicture_(source,dx1,dy1,dx2,dy2,sx1,sy1,sx2,sy2,rgb);
88 public void drawPicture(Picture source, int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2) {
89 drawPicture_(source,dx1,dy1,dx2,dy2,sx1,sy1,sx2,sy2,0xffffffff);
92 private void drawPicture_(Picture source, int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2, int color) {
95 GLPicture p = (GLPicture) source;
96 p.draw(dx1,dy1,dx2,dy2,sx1,sy1,sx2,sy2);
100 public final static int roundToPowerOf2(int n) {
101 if(((n-1)&n)==0) return n;
102 for(int x=2;x!=0;x<<=1) if(n < x) return x;
106 private Picture _createPicture(Object data, int w, int h, boolean alphaOnly) {
107 if(rectangularTextures && w <= maxRectTexSize && h <= maxRectTexSize) new RectGLPicture(data,w,h,alphaOnly,this);
108 if(w <= maxTexSize && h <= maxTexSize) return new SquareGLPicture(data,w,h,alphaOnly,this);
109 return new MosaicGLPicture(data,w,h,alphaOnly,this);
112 public Picture createPicture(int[] data, int w, int h) {
113 if(w*h > data.length) throw new Error("should never happen");
114 return _createPicture(data,w,h,false);
116 public Picture createAlphaOnlyPicture(byte[] data, int w, int h) {
117 if(w*h > data.length) throw new Error("should never happen");
118 return _createPicture(data,w,h,true);
121 private native void natDeleteTexture(int tex);
122 public void deleteTexture(final int tex) {
123 // CHECKME: Is this safe to do from finalize()?
124 // natDeleteTexture MUST be run from the message queue thread
125 Message.Q.add(new Message() { public void perform() {
126 natDeleteTexture(tex);
130 private static abstract class GLPicture extends Picture {
132 protected int height;
134 public final int getWidth() { return width; }
135 public final int getHeight() { return height; }
137 public GLPicture(int w, int h) {
142 public abstract void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
143 protected abstract void finalize();
146 private static class RectGLPicture extends GLPicture {
148 public int textureName;
150 public native void natInit(Object data, boolean alphaOnly);
152 public RectGLPicture(Object data,int w, int h, boolean alphaOnly, OpenGL gl) {
155 natInit(data,alphaOnly);
158 public native void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
159 protected void finalize() { gl.deleteTexture(textureName); }
162 private static class SquareGLPicture extends GLPicture {
163 private int texHeight;
164 private int texWidth;
166 public int textureName;
168 public native void natInit(Object data, boolean alphaOnly);
170 public SquareGLPicture(Object data,int w, int h, boolean alphaOnly, OpenGL gl) {
173 if(w > 0x7fffffff || h > 0x7fffffff) throw new Error("insane texture size: " + w + "x" + h);
174 texHeight = roundToPowerOf2(h);
175 texWidth = roundToPowerOf2(w);
176 natInit(data,alphaOnly);
179 public native void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
180 protected void finalize() { gl.deleteTexture(textureName); }
183 private static class MosaicGLPicture extends GLPicture {
184 private static final int overlap = 8;
189 private static float wastedSpace(int w,int h,int size) {
190 int w2 = size * ((w+size-1)/size);
191 int h2 = size * ((h+size-1)/size);
192 return 1.0f-(float)(w*h)/(float)(w2*h2);
195 private static Object subData(Object data, int x, int y, int w, int h, int rowSize) {
196 if(data instanceof byte[]) return subData((byte[])data,x,y,w,h,rowSize);
197 if(data instanceof int[]) return subData((int[])data,x,y,w,h,rowSize);
198 throw new Error("not reached");
201 private static int[] subData(int[] data, int x, int y, int w, int h, int rowSize) {
202 int[] sub = new int[w*h];
204 for(int i=0;i<h;i++,row++)
206 sub[i*w+j] = data[row*rowSize+j+x];
210 private static byte[] subData(byte[] data, int x, int y, int w, int h, int rowSize) {
211 byte[] sub = new byte[w*h];
213 for(int i=0;i<h;i++,row++)
215 sub[i*w+j] = data[row*rowSize+j+x];
219 public MosaicGLPicture(Object data,int w, int h, boolean alphaOnly, OpenGL gl) {
221 psize = gl.maxTexSize;
222 while(wastedSpace(w,h,psize) > 0.40) psize/=2;
223 Log.log(this,"Using psize: " + psize + " for " + w + "x" + h + " image (wasted space: " + wastedSpace(w,h,psize));
225 int rows = (h+psize-1)/psize;
226 int cols = (w+psize-1)/psize;
229 pics = new GLPicture[rows][cols];
230 for(int i=0;i<rows-1;i++)
231 for(int j=0;j<cols-1;j++)
232 pics[i][j] = new SquareGLPicture(subData(data,j*psize,i*psize,psize,psize,w),psize,psize,alphaOnly,gl);
233 tmp = (rows-1)*psize;
234 for(int i=0;i<cols-1;i++)
235 pics[rows-1][i] = new SquareGLPicture(subData(data,i*psize,tmp,psize,h-tmp,w),psize,h-tmp,alphaOnly,gl);
236 tmp2 = (cols-1)*psize;
237 for(int i=0;i<rows-1;i++)
238 pics[i][cols-1] = new SquareGLPicture(subData(data,tmp2,i*psize,w-tmp2,psize,w),w-tmp2,psize,alphaOnly,gl);
239 pics[rows-1][cols-1] = new SquareGLPicture(subData(data,tmp2,tmp,w-tmp2,h-tmp,w),w-tmp2,h-tmp,alphaOnly,gl);
241 protected void finalize() { }
243 private static final int max(int a, int b) { return a > b ? a : b; }
244 private static final int min(int a, int b) { return a < b ? a : b; }
246 public void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2) {
247 double xscale = (double)(dx2-dx1)/(double)(sx2-sx1);
248 double yscale = (double)(dy2-dy1)/(double)(sy2-sy1);
249 int totalWidth = width;
250 int totalHeight = height;
251 // *{x,y}{1,2} key: d=dest s=src, p=bounds of this picture, i=intersection of s and p, pd = dest of this pic
252 //System.out.println("Starting draw..." + sx1 + "," + sy1 + " " + sx2 + "," + sy2 + " to " + dx1 +"," + dy1 + " " + dx2 + "," + dy2);
253 for(int i=0;i<pics.length;i++) {
254 for(int j=0;j<pics[i].length;j++) {
257 int px2 = min(px1+psize,totalWidth);
258 int py2 = min(py1+psize,totalHeight);
259 int ix1 = max(px1,sx1);
260 int iy1 = max(py1,sy1);
261 int ix2 = min(px2,sx2);
262 int iy2 = min(py2,sy2);
263 if(ix1 >= ix2 || iy1 >= iy2) continue; // no intersection
265 int pdx1 = dx1 + (int) (xscale*(ix1-sx1));
266 int pdy1 = dy1 + (int) (yscale*(iy1-sy1));
267 int pdx2 = dx2 - (int) (xscale*(sx2-ix2));
268 int pdy2 = dy2 - (int) (yscale*(sy2-iy2));
270 //System.out.println("" + i + "," + j + " is good... drawing from " + (ix1-px1) + "," + (iy1-py1) + " " + (ix2-px1) + "," + (iy2-py1) + " to " + pdx1 + "," + pdy1 + " to " + pdx2 + "," + pdy2);
272 pics[i][j].draw(pdx1,pdy1,pdx2,pdy2,ix1-px1,iy1-py1,ix2-px1,iy2-py1);