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 // FIXME: 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 fillRect(int x, int y, int x2, int y2, int color);
78 public native void fillTrapezoid(int x1, int x2, int y1, int x3, int x4, int y2, int color);
80 public void drawString(String font, String text, int x, int y, int color) {
81 //System.out.println("drawString(): " + text);
84 public void drawPicture(org.xwt.Picture source, int x, int y) {
86 GLPicture p = (GLPicture) source;
89 public void drawPicture(org.xwt.Picture source, int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2) {
91 GLPicture p = (GLPicture) source;
92 p.draw(dx1,dy1,dx2,dy2,sx1,sy1,sx2,sy2);
96 public final static int roundToPowerOf2(int n) {
97 if(((n-1)&n)==0) return n;
98 for(int x=2;x!=0;x<<=1) if(n < x) return x;
102 public Picture createPicture(int[] data, int w, int h) {
103 if(rectangularTextures && w <= maxRectTexSize && h <= maxRectTexSize) new RectGLPicture(data,w,h,this);
104 if(w <= maxTexSize && h <= maxTexSize) return new SquareGLPicture(data,w,h,this);
105 return new MosaicGLPicture(data,w,h,this);
108 private native void natDeleteTexture(int tex);
109 public void deleteTexture(final int tex) {
110 // CHECKME: Is this safe to do from finalize()?
111 // natDeleteTexture MUST be run from the message queue thread
112 MessageQueue.add(new Message() { public void perform() {
113 natDeleteTexture(tex);
117 private static abstract class GLPicture extends Picture {
119 protected int height;
121 public final int getWidth() { return width; }
122 public final int getHeight() { return height; }
124 public GLPicture(int w, int h) {
129 public void draw(int x, int y) { draw(x,y,x+width,y+height,0,0,width,height); }
130 public abstract void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
131 protected abstract void finalize();
134 private static class RectGLPicture extends GLPicture {
136 public int textureName;
138 public native void natInit(int[] data);
140 public RectGLPicture(int[] data,int w, int h, OpenGL gl) {
146 public native void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
147 protected void finalize() { gl.deleteTexture(textureName); }
150 private static class SquareGLPicture extends GLPicture {
151 private int texHeight;
152 private int texWidth;
154 public int textureName;
156 public native void natInit(int[] data);
158 public SquareGLPicture(int[] data,int w, int h, OpenGL gl) {
161 if(w > 0x7fffffff || h > 0x7fffffff) throw new Error("insane texture size: " + w + "x" + h);
162 texHeight = roundToPowerOf2(h);
163 texWidth = roundToPowerOf2(w);
167 public native void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
168 protected void finalize() { gl.deleteTexture(textureName); }
171 private static class MosaicGLPicture extends GLPicture {
172 private static final int overlap = 8;
177 private static float wastedSpace(int w,int h,int size) {
178 int w2 = size * ((w+size-1)/size);
179 int h2 = size * ((h+size-1)/size);
180 return 1.0f-(float)(w*h)/(float)(w2*h2);
183 private static int[] subData(int[] data, int x, int y, int w, int h, int rowSize) {
184 int[] sub = new int[w*h];
187 for(int i=0;i<h;i++,row++)
189 sub[i*w+j] = data[row*rowSize+j+x];
190 } catch(ArrayIndexOutOfBoundsException e) {
191 Log.log(MosaicGLPicture.class,"subData(data("+data.length+"),"+x+","+y+","+w+","+h+","+rowSize);
197 public MosaicGLPicture(int[] data,int w, int h, OpenGL gl) {
199 psize = gl.maxTexSize;
200 while(wastedSpace(w,h,psize) > 0.40) psize/=2;
201 Log.log(this,"Using psize: " + psize + " for " + w + "x" + h + " image (wasted space: " + wastedSpace(w,h,psize));
203 int rows = (h+psize-1)/psize;
204 int cols = (w+psize-1)/psize;
207 pics = new GLPicture[rows][cols];
208 for(int i=0;i<rows-1;i++)
209 for(int j=0;j<cols-1;j++)
210 pics[i][j] = new SquareGLPicture(subData(data,j*psize,i*psize,psize,psize,w),psize,psize,gl);
211 tmp = (rows-1)*psize;
212 for(int i=0;i<cols-1;i++)
213 pics[rows-1][i] = new SquareGLPicture(subData(data,i*psize,tmp,psize,h-tmp,w),psize,h-tmp,gl);
214 tmp2 = (cols-1)*psize;
215 for(int i=0;i<rows-1;i++)
216 pics[i][cols-1] = new SquareGLPicture(subData(data,tmp2,i*psize,w-tmp2,psize,w),w-tmp2,psize,gl);
217 pics[rows-1][cols-1] = new SquareGLPicture(subData(data,tmp2,tmp,w-tmp2,h-tmp,w),w-tmp2,h-tmp,gl);
219 protected void finalize() { }
221 private static final int max(int a, int b) { return a > b ? a : b; }
222 private static final int min(int a, int b) { return a < b ? a : b; }
224 public void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2) {
225 double xscale = (double)(dx2-dx1)/(double)(sx2-sx1);
226 double yscale = (double)(dy2-dy1)/(double)(sy2-sy1);
227 int totalWidth = width;
228 int totalHeight = height;
229 // *{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
230 //System.out.println("Starting draw..." + sx1 + "," + sy1 + " " + sx2 + "," + sy2 + " to " + dx1 +"," + dy1 + " " + dx2 + "," + dy2);
231 for(int i=0;i<pics.length;i++) {
232 for(int j=0;j<pics[i].length;j++) {
235 int px2 = min(px1+psize,totalWidth);
236 int py2 = min(py1+psize,totalHeight);
237 int ix1 = max(px1,sx1);
238 int iy1 = max(py1,sy1);
239 int ix2 = min(px2,sx2);
240 int iy2 = min(py2,sy2);
241 if(ix1 >= ix2 || iy1 >= iy2) continue; // no intersection
243 int pdx1 = dx1 + (int) (xscale*(ix1-sx1));
244 int pdy1 = dy1 + (int) (yscale*(iy1-sy1));
245 int pdx2 = dx2 - (int) (xscale*(sx2-ix2));
246 int pdy2 = dy2 - (int) (yscale*(sy2-iy2));
248 //System.out.println("" + i + "," + j + " is good... drawing from " + (ix1-px1) + "," + (iy1-py1) + " " + (ix2-px1) + "," + (iy2-py1) + " to " + pdx1 + "," + pdy1 + " to " + pdx2 + "," + pdy2);
250 pics[i][j].draw(pdx1,pdy1,pdx2,pdy2,ix1-px1,iy1-py1,ix2-px1,iy2-py1);