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; }
18 private native void natInit();
20 private static float parseVersion(String s) {
21 int end = s.indexOf(' ');
22 if(end < 0) end = s.length();
24 return Float.parseFloat(s.substring(0,end));
25 } catch(NumberFormatException e) {
26 return 1.1f; // just a guess
29 // This MUST be called after OpenGL is instansiated (and activateSharedContext is functioning)
30 public void init() throws NotSupportedException {
32 float v = parseVersion(version);
33 // FEATURE: enable linear filtering for OpenGL >= 1.2
34 // If we disable linear filtering (and therefor GL_CLAMP_TO_EDGE) we could probably get by with less
35 if(v < 1.1) throw new NotSupportedException("OpenGL 1.1 or greater is required. (you have: " + version +" - " + v + ")");
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 void drawPicture(org.xwt.Picture source, int x, int y) {
85 GLPicture p = (GLPicture) source;
88 public void drawPicture(org.xwt.Picture source, int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2) {
90 GLPicture p = (GLPicture) source;
91 p.draw(dx1,dy1,dx2,dy2,sx1,sy1,sx2,sy2);
95 public final static int roundToPowerOf2(int n) {
96 if(((n-1)&n)==0) return n;
97 for(int x=2;x!=0;x<<=1) if(n < x) return x;
101 public Picture createPicture(int[] data, int w, int h) {
102 if(rectangularTextures && w <= maxRectTexSize && h <= maxRectTexSize) new RectGLPicture(data,w,h,this);
103 if(w <= maxTexSize && h <= maxTexSize) return new SquareGLPicture(data,w,h,this);
104 return new MosaicGLPicture(data,w,h,this);
107 private native void natDeleteTexture(int tex);
108 public void deleteTexture(final int tex) {
109 // CHECKME: Is this safe to do from finalize()?
110 // natDeleteTexture MUST be run from the message queue thread
111 Message.Q.add(new Message() { public void perform() {
112 natDeleteTexture(tex);
116 private static abstract class GLPicture extends Picture {
118 protected int height;
120 public final int getWidth() { return width; }
121 public final int getHeight() { return height; }
123 public GLPicture(int w, int h) {
128 public void draw(int x, int y) { draw(x,y,x+width,y+height,0,0,width,height); }
129 public abstract void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
130 protected abstract void finalize();
133 private static class RectGLPicture extends GLPicture {
135 public int textureName;
137 public native void natInit(int[] data);
139 public RectGLPicture(int[] data,int w, int h, OpenGL gl) {
145 public native void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
146 protected void finalize() { gl.deleteTexture(textureName); }
149 private static class SquareGLPicture extends GLPicture {
150 private int texHeight;
151 private int texWidth;
153 public int textureName;
155 public native void natInit(int[] data);
157 public SquareGLPicture(int[] data,int w, int h, OpenGL gl) {
160 if(w > 0x7fffffff || h > 0x7fffffff) throw new Error("insane texture size: " + w + "x" + h);
161 texHeight = roundToPowerOf2(h);
162 texWidth = roundToPowerOf2(w);
166 public native void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
167 protected void finalize() { gl.deleteTexture(textureName); }
170 private static class MosaicGLPicture extends GLPicture {
171 private static final int overlap = 8;
176 private static float wastedSpace(int w,int h,int size) {
177 int w2 = size * ((w+size-1)/size);
178 int h2 = size * ((h+size-1)/size);
179 return 1.0f-(float)(w*h)/(float)(w2*h2);
182 private static int[] subData(int[] data, int x, int y, int w, int h, int rowSize) {
183 int[] sub = new int[w*h];
186 for(int i=0;i<h;i++,row++)
188 sub[i*w+j] = data[row*rowSize+j+x];
189 } catch(ArrayIndexOutOfBoundsException e) {
190 Log.log(MosaicGLPicture.class,"subData(data("+data.length+"),"+x+","+y+","+w+","+h+","+rowSize);
196 public MosaicGLPicture(int[] data,int w, int h, OpenGL gl) {
198 psize = gl.maxTexSize;
199 while(wastedSpace(w,h,psize) > 0.40) psize/=2;
200 Log.log(this,"Using psize: " + psize + " for " + w + "x" + h + " image (wasted space: " + wastedSpace(w,h,psize));
202 int rows = (h+psize-1)/psize;
203 int cols = (w+psize-1)/psize;
206 pics = new GLPicture[rows][cols];
207 for(int i=0;i<rows-1;i++)
208 for(int j=0;j<cols-1;j++)
209 pics[i][j] = new SquareGLPicture(subData(data,j*psize,i*psize,psize,psize,w),psize,psize,gl);
210 tmp = (rows-1)*psize;
211 for(int i=0;i<cols-1;i++)
212 pics[rows-1][i] = new SquareGLPicture(subData(data,i*psize,tmp,psize,h-tmp,w),psize,h-tmp,gl);
213 tmp2 = (cols-1)*psize;
214 for(int i=0;i<rows-1;i++)
215 pics[i][cols-1] = new SquareGLPicture(subData(data,tmp2,i*psize,w-tmp2,psize,w),w-tmp2,psize,gl);
216 pics[rows-1][cols-1] = new SquareGLPicture(subData(data,tmp2,tmp,w-tmp2,h-tmp,w),w-tmp2,h-tmp,gl);
218 protected void finalize() { }
220 private static final int max(int a, int b) { return a > b ? a : b; }
221 private static final int min(int a, int b) { return a < b ? a : b; }
223 public void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2) {
224 double xscale = (double)(dx2-dx1)/(double)(sx2-sx1);
225 double yscale = (double)(dy2-dy1)/(double)(sy2-sy1);
226 int totalWidth = width;
227 int totalHeight = height;
228 // *{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
229 //System.out.println("Starting draw..." + sx1 + "," + sy1 + " " + sx2 + "," + sy2 + " to " + dx1 +"," + dy1 + " " + dx2 + "," + dy2);
230 for(int i=0;i<pics.length;i++) {
231 for(int j=0;j<pics[i].length;j++) {
234 int px2 = min(px1+psize,totalWidth);
235 int py2 = min(py1+psize,totalHeight);
236 int ix1 = max(px1,sx1);
237 int iy1 = max(py1,sy1);
238 int ix2 = min(px2,sx2);
239 int iy2 = min(py2,sy2);
240 if(ix1 >= ix2 || iy1 >= iy2) continue; // no intersection
242 int pdx1 = dx1 + (int) (xscale*(ix1-sx1));
243 int pdy1 = dy1 + (int) (yscale*(iy1-sy1));
244 int pdx2 = dx2 - (int) (xscale*(sx2-ix2));
245 int pdy2 = dy2 - (int) (yscale*(sy2-iy2));
247 //System.out.println("" + i + "," + j + " is good... drawing from " + (ix1-px1) + "," + (iy1-py1) + " " + (ix2-px1) + "," + (iy2-py1) + " to " + pdx1 + "," + pdy1 + " to " + pdx2 + "," + pdy2);
249 pics[i][j].draw(pdx1,pdy1,pdx2,pdy2,ix1-px1,iy1-py1,ix2-px1,iy2-py1);