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 native void drawPictureAlphaOnly(Picture source, int dx1, int dy1, int dx2, int dy2,
84 int sx1, int sy1, int sx2, int sy2, int rgb);
86 public void drawPicture(org.xwt.Picture source, int x, int y) {
88 GLPicture p = (GLPicture) source;
91 public void drawPicture(org.xwt.Picture source, int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2) {
93 GLPicture p = (GLPicture) source;
94 p.draw(dx1,dy1,dx2,dy2,sx1,sy1,sx2,sy2);
98 public final static int roundToPowerOf2(int n) {
99 if(((n-1)&n)==0) return n;
100 for(int x=2;x!=0;x<<=1) if(n < x) return x;
104 public Picture createPicture(int[] data, int w, int h) {
105 if(rectangularTextures && w <= maxRectTexSize && h <= maxRectTexSize) new RectGLPicture(data,w,h,this);
106 if(w <= maxTexSize && h <= maxTexSize) return new SquareGLPicture(data,w,h,this);
107 return new MosaicGLPicture(data,w,h,this);
110 private native void natDeleteTexture(int tex);
111 public void deleteTexture(final int tex) {
112 // CHECKME: Is this safe to do from finalize()?
113 // natDeleteTexture MUST be run from the message queue thread
114 Message.Q.add(new Message() { public void perform() {
115 natDeleteTexture(tex);
119 private static abstract class GLPicture extends Picture {
121 protected int height;
123 public final int getWidth() { return width; }
124 public final int getHeight() { return height; }
126 public GLPicture(int w, int h) {
131 public void draw(int x, int y) { draw(x,y,x+width,y+height,0,0,width,height); }
132 public abstract void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
133 protected abstract void finalize();
136 private static class RectGLPicture extends GLPicture {
138 public int textureName;
140 public native void natInit(int[] data);
142 public RectGLPicture(int[] data,int w, int h, OpenGL gl) {
148 public native void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
149 protected void finalize() { gl.deleteTexture(textureName); }
152 private static class SquareGLPicture extends GLPicture {
153 private int texHeight;
154 private int texWidth;
156 public int textureName;
158 public native void natInit(int[] data);
160 public SquareGLPicture(int[] data,int w, int h, OpenGL gl) {
163 if(w > 0x7fffffff || h > 0x7fffffff) throw new Error("insane texture size: " + w + "x" + h);
164 texHeight = roundToPowerOf2(h);
165 texWidth = roundToPowerOf2(w);
169 public native void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2);
170 protected void finalize() { gl.deleteTexture(textureName); }
173 private static class MosaicGLPicture extends GLPicture {
174 private static final int overlap = 8;
179 private static float wastedSpace(int w,int h,int size) {
180 int w2 = size * ((w+size-1)/size);
181 int h2 = size * ((h+size-1)/size);
182 return 1.0f-(float)(w*h)/(float)(w2*h2);
185 private static int[] subData(int[] data, int x, int y, int w, int h, int rowSize) {
186 int[] sub = new int[w*h];
189 for(int i=0;i<h;i++,row++)
191 sub[i*w+j] = data[row*rowSize+j+x];
192 } catch(ArrayIndexOutOfBoundsException e) {
193 Log.log(MosaicGLPicture.class,"subData(data("+data.length+"),"+x+","+y+","+w+","+h+","+rowSize);
199 public MosaicGLPicture(int[] data,int w, int h, OpenGL gl) {
201 psize = gl.maxTexSize;
202 while(wastedSpace(w,h,psize) > 0.40) psize/=2;
203 Log.log(this,"Using psize: " + psize + " for " + w + "x" + h + " image (wasted space: " + wastedSpace(w,h,psize));
205 int rows = (h+psize-1)/psize;
206 int cols = (w+psize-1)/psize;
209 pics = new GLPicture[rows][cols];
210 for(int i=0;i<rows-1;i++)
211 for(int j=0;j<cols-1;j++)
212 pics[i][j] = new SquareGLPicture(subData(data,j*psize,i*psize,psize,psize,w),psize,psize,gl);
213 tmp = (rows-1)*psize;
214 for(int i=0;i<cols-1;i++)
215 pics[rows-1][i] = new SquareGLPicture(subData(data,i*psize,tmp,psize,h-tmp,w),psize,h-tmp,gl);
216 tmp2 = (cols-1)*psize;
217 for(int i=0;i<rows-1;i++)
218 pics[i][cols-1] = new SquareGLPicture(subData(data,tmp2,i*psize,w-tmp2,psize,w),w-tmp2,psize,gl);
219 pics[rows-1][cols-1] = new SquareGLPicture(subData(data,tmp2,tmp,w-tmp2,h-tmp,w),w-tmp2,h-tmp,gl);
221 protected void finalize() { }
223 private static final int max(int a, int b) { return a > b ? a : b; }
224 private static final int min(int a, int b) { return a < b ? a : b; }
226 public void draw(int dx1, int dy1, int dx2, int dy2,int sx1, int sy1, int sx2, int sy2) {
227 double xscale = (double)(dx2-dx1)/(double)(sx2-sx1);
228 double yscale = (double)(dy2-dy1)/(double)(sy2-sy1);
229 int totalWidth = width;
230 int totalHeight = height;
231 // *{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
232 //System.out.println("Starting draw..." + sx1 + "," + sy1 + " " + sx2 + "," + sy2 + " to " + dx1 +"," + dy1 + " " + dx2 + "," + dy2);
233 for(int i=0;i<pics.length;i++) {
234 for(int j=0;j<pics[i].length;j++) {
237 int px2 = min(px1+psize,totalWidth);
238 int py2 = min(py1+psize,totalHeight);
239 int ix1 = max(px1,sx1);
240 int iy1 = max(py1,sy1);
241 int ix2 = min(px2,sx2);
242 int iy2 = min(py2,sy2);
243 if(ix1 >= ix2 || iy1 >= iy2) continue; // no intersection
245 int pdx1 = dx1 + (int) (xscale*(ix1-sx1));
246 int pdy1 = dy1 + (int) (yscale*(iy1-sy1));
247 int pdx2 = dx2 - (int) (xscale*(sx2-ix2));
248 int pdy2 = dy2 - (int) (yscale*(sy2-iy2));
250 //System.out.println("" + i + "," + j + " is good... drawing from " + (ix1-px1) + "," + (iy1-py1) + " " + (ix2-px1) + "," + (iy2-py1) + " to " + pdx1 + "," + pdy1 + " to " + pdx2 + "," + pdy2);
252 pics[i][j].draw(pdx1,pdy1,pdx2,pdy2,ix1-px1,iy1-py1,ix2-px1,iy2-py1);