1 // Copyright 2003 Adam Megacz, see the COPYING file for licensing [LGPL]
2 // Author: Brian Alliet
4 // IMPROVMENT: use alpha testing? might be faster
6 #include <org/xwt/plat/OpenGL.h>
7 #include <org/xwt/plat/OpenGL$GLPixelBuffer.h>
8 #include <org/xwt/plat/OpenGL$GLPicture.h>
9 #include <org/xwt/plat/OpenGL$RectGLPicture.h>
10 #include <org/xwt/plat/OpenGL$SquareGLPicture.h>
11 #include <org/xwt/plat/OpenGL$MosaicGLPicture.h>
13 #include <java/lang/Error.h>
16 #include <OpenGL/gl.h>
17 #include <OpenGL/glu.h>
18 #include <OpenGL/glext.h>
20 #warning I am not sure if these are correct
28 namespace org { namespace xwt { namespace plat {
30 #define checkGLError() checkGLError2(__FILE__,__LINE__)
31 static void checkGLError2(const char *file,int line) {
32 GLenum err = glGetError();
33 if(err == GL_NO_ERROR) return;
35 fprintf(stderr,"%s:%d: GL Error: %s",file,line,(char *) gluErrorString(err));
39 void OpenGL::natInit() {
42 activateSharedContext();
43 s = glGetString(GL_EXTENSIONS);
44 rectangularTextures = (jboolean) gluCheckExtension((GLubyte*)"GL_EXT_texture_rectangle",s);
45 glGetIntegerv(GL_MAX_TEXTURE_SIZE,&i);
46 maxTexSize = (jint) i;
47 if(rectangularTextures) {
48 glGetIntegerv(GL_MAX_RECTANGLE_TEXTURE_SIZE_EXT,&i);
49 maxRectTexSize = (jint) i;
51 s = glGetString(GL_VENDOR);
52 vendor = JvNewStringLatin1(s==0 ? "" : (char*)s);
53 s = glGetString(GL_RENDERER);
54 renderer = JvNewStringLatin1(s==0 ? "" : (char*)s);
55 s = glGetString(GL_VERSION);
56 version = JvNewStringLatin1(s==0 ? "" : (char*)s);
59 void OpenGL$GLPixelBuffer::drawableInit(jint width, jint height) {
60 glClearColor (0.3f, 0.7f, 1.0f, 1.0f);
62 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
63 glShadeModel(GL_SMOOTH);
65 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
67 glViewport(0,0,width,height);
68 glMatrixMode(GL_PROJECTION);
70 glOrtho(0,width,height,0,-1,1);
71 // CHECKME: This causes textures to be blurry, but something like this
72 // (but not this) might be required to draw straight lines
73 //glMatrixMode(GL_MODELVIEW);
75 //glTranslatef(0.375, 0.375, 0.0);
80 void OpenGL$GLPixelBuffer::setColor(jint argb) {
81 float alpha = ((argb >> 24) & 0xff) / 255.0;
82 float red = ((argb >> 16) & 0xff) / 255.0;
83 float green = ((argb >> 8) & 0xff) / 255.0;
84 float blue = ((argb >> 0) & 0xff) / 255.0;
85 glColor4f(red,green,blue,alpha);
88 void OpenGL$GLPixelBuffer::fillTrapezoid(jint x1, jint x2, jint y1, jint x3, jint x4, jint y2, jint color) {
92 glVertex3f(x1,y1,0.0f );
93 glVertex3f(x3,y2,0.0f );
94 glVertex3f(x4,y2,0.0f );
95 glVertex3f(x2,y1,0.0f );
99 void OpenGL$GLPixelBuffer::setClip(jint x1, jint y1, jint x2, jint y2) {
100 //fprintf(stderr,"setClip: %d %d %d %d\n",x1,y1,x2,y2);
101 if(x1==0 && y1==0 && x2==width && y2==height) {
102 if(glScissorEnabled) {
104 glDisable(GL_SCISSOR_TEST);
105 glScissorEnabled = false;
110 if(!glScissorEnabled) {
111 glEnable(GL_SCISSOR_TEST);
112 glScissorEnabled = true;
114 if((x1 >= x2) || (y1 >= y2))
117 glScissor(x1,height-y2,x2-x1,y2-y1);
121 void OpenGL$GLPixelBuffer::resetClip() {
123 if(glScissorEnabled) {
124 glDisable(GL_SCISSOR_TEST);
125 glScissorEnabled = false;
129 // FEATURE: Eliminate duplicate code in RectGLPicture and SquareGLPicture
130 void OpenGL$RectGLPicture::natInit(Object *data_, jboolean alphaOnly) {
133 int size = width*height;
137 jbyte *data = elements((JArray<jbyte> *)data_);
138 buf = (unsigned char *) data;
140 jint *data = elements((JArray<jint> *)data_);
141 buf = new unsigned char[size*4];
142 for(i=0,j=0;i<size;i++,j+=4) {
143 jint pixel = data[i];
144 buf[j+0] = (pixel >> 16) & 0xff;
145 buf[j+1] = (pixel >> 8) & 0xff;
146 buf[j+2] = (pixel >> 0) & 0xff;
147 buf[j+3] = (pixel >> 24) & 0xff;
151 gl->activateSharedContext();
152 glEnable(GL_TEXTURE_RECTANGLE_EXT);
153 glGenTextures(1,&tex);
154 glBindTexture(GL_TEXTURE_RECTANGLE_EXT,tex);
155 glPixelStorei(GL_PACK_ALIGNMENT,1);
157 GL_TEXTURE_RECTANGLE_EXT,0,
158 alphaOnly ? GL_ALPHA : GL_RGBA,width,height,0,
159 alphaOnly ? GL_ALPHA : GL_RGBA,GL_UNSIGNED_BYTE,buf);
163 if(gl->glVersion >= 1.2) {
164 glTexParameteri(GL_TEXTURE_RECTANGLE_EXT,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
165 glTexParameteri(GL_TEXTURE_RECTANGLE_EXT,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
166 glTexParameterf(GL_TEXTURE_RECTANGLE_EXT,GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
167 glTexParameterf(GL_TEXTURE_RECTANGLE_EXT,GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
169 glTexParameteri(GL_TEXTURE_RECTANGLE_EXT,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
170 glTexParameteri(GL_TEXTURE_RECTANGLE_EXT,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
173 glDisable(GL_TEXTURE_RECTANGLE_EXT);
176 textureName = (jint)tex;
179 void OpenGL$RectGLPicture::draw(jint dx, jint dy, jint cx1, jint cy1, jint cx2, jint cy2) {
180 glEnable(GL_TEXTURE_RECTANGLE_EXT);
181 glBindTexture(GL_TEXTURE_RECTANGLE_EXT, textureName);
183 glTexCoord2i (cx1 - dx, cy1 - dy );
184 glVertex3i (dx1, dy1, 0);
185 glTexCoord2i (cx2 - dx, cy1 - dy );
186 glVertex3i (dx2, dy1, 0);
187 glTexCoord2i (cx2 - dx, cy2 - dy );
188 glVertex3i (dx2, dy2, 0);
189 glTexCoord2i (cx1 - dx, cy2 - dy );
190 glVertex3i (dx1, dy2, 0);
192 glDisable(GL_TEXTURE_RECTANGLE_EXT);
196 void OpenGL::natDeleteTexture(jint tex_) {
197 activateSharedContext();
198 GLuint tex = (GLuint) tex_;
199 glDeleteTextures(1,&tex);
202 void OpenGL$SquareGLPicture::natInit(Object *data_, jboolean alphaOnly) {
208 jbyte *data = elements((JArray<jbyte>*) data_);
209 if(texWidth == width && texHeight == height) {
210 buf = (unsigned char*) data;
212 buf = new unsigned char[texWidth*texHeight];
214 for(row=0;row<height;row++) {
215 for(col=0;col<width;col++)
216 buf[p++] = data[row*width+col];
217 for(;col<texWidth;col++)
220 for(;row<texHeight;row++)
221 for(col=0;col<texWidth;col++)
225 jint *data = elements((JArray<jint>*) data_);
226 buf = new unsigned char[texWidth*texHeight*4];
228 for(row=0;row<height;row++) {
229 for(col=0;col<width;col++) {
230 jint pixel = data[row*width+col];
231 buf[p+0] = (pixel >> 16) & 0xff;
232 buf[p+1] = (pixel >> 8) & 0xff;
233 buf[p+2] = (pixel >> 0) & 0xff;
234 buf[p+3] = (pixel >> 24) & 0xff;
237 for(;col < texWidth;col++,p+=4)
238 buf[p+0] = buf[p+1] = buf[p+2] = buf[p+3] = 0;
240 for(;row < texHeight;row++)
241 for(col=0;col<texWidth;col++,p+=4)
242 buf[p+0] = buf[p+1] = buf[p+2] = buf[p+3] = 0;
245 gl->activateSharedContext();
246 glEnable(GL_TEXTURE_2D);
247 glGenTextures(1,&tex);
248 glBindTexture(GL_TEXTURE_2D,tex);
249 glPixelStorei(GL_PACK_ALIGNMENT,1);
250 glTexImage2D(GL_TEXTURE_2D,0,alphaOnly ? GL_ALPHA : GL_RGBA,texWidth,texHeight,0,alphaOnly ? GL_ALPHA : GL_RGBA,GL_UNSIGNED_BYTE,buf);
252 if(!alphaOnly || width != texWidth || height != texHeight) delete buf;
254 if(gl->glVersion >= 1.2) {
255 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
256 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
257 glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
258 glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
260 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
261 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
264 glDisable(GL_TEXTURE_2D);
267 textureName = (jint)tex;
270 void OpenGL$SquareGLPicture::draw(jint dx, jint dy, jint cx1, jint cy1, jint cx2, jint cy2) {
271 glEnable(GL_TEXTURE_2D);
272 glBindTexture(GL_TEXTURE_2D, textureName);
275 glTexCoord2f (cx1 - dx, cy1 - dy );
276 glVertex3i (dx1, dy1, 0);
277 glTexCoord2f (cx2 - dx, cy1 - dy );
278 glVertex3i (dx2, dy1, 0);
279 glTexCoord2f (cx2 - dx, cy2 - dy );
280 glVertex3i (dx2, dy2, 0);
281 glTexCoord2f (cx1 - dx, cy2 - dy );
282 glVertex3i (dx1, dy2, 0);
284 glDisable(GL_TEXTURE_2D);
288 } } } // end org::xwt::plat