diff options
| -rw-r--r-- | src/demos/vertexProgRefract/VertexProgRefract.java | 80 |
1 files changed, 75 insertions, 5 deletions
diff --git a/src/demos/vertexProgRefract/VertexProgRefract.java b/src/demos/vertexProgRefract/VertexProgRefract.java index 0670898..cee2054 100644 --- a/src/demos/vertexProgRefract/VertexProgRefract.java +++ b/src/demos/vertexProgRefract/VertexProgRefract.java @@ -58,10 +58,11 @@ import gleem.linalg.*; Cubemap courtesy of Paul Debevec<p> - Ported to Java by Kenneth Russell + Ported to Java and ARB_fragment_program by Kenneth Russell */ public class VertexProgRefract { + private boolean useRegisterCombiners; private GLCanvas canvas; private Animator animator; private volatile boolean quit; @@ -96,6 +97,7 @@ public class VertexProgRefract { class Listener implements GLEventListener { private int vtxProg; + private int fragProg; private int cubemap; private int bunnydl; private int obj; @@ -227,8 +229,22 @@ public class VertexProgRefract { try { initExtension(gl, "GL_ARB_vertex_program"); - initExtension(gl, "GL_NV_register_combiners"); initExtension(gl, "GL_ARB_multitexture"); + if (!gl.isExtensionAvailable("GL_ARB_fragment_program")) { + if (gl.isExtensionAvailable("GL_NV_register_combiners")) { + useRegisterCombiners = true; + } else { + final String message = "This demo requires either the GL_ARB_fragment_program\n" + + "or GL_NV_register_combiners extension"; + new Thread(new Runnable() { + public void run() { + JOptionPane.showMessageDialog(null, message, "Unavailable extension", JOptionPane.ERROR_MESSAGE); + runExit(); + } + }).start(); + throw new RuntimeException(message); + } + } } catch (RuntimeException e) { quit = true; throw(e); @@ -268,7 +284,11 @@ public class VertexProgRefract { gl.glDisable(GL.GL_CULL_FACE); - initCombiners(gl); + if (useRegisterCombiners) { + initCombiners(gl); + } else { + initFragmentProgram(gl); + } try { bunnydl = Bunny.gen3DObjectList(gl); @@ -361,7 +381,12 @@ public class VertexProgRefract { gl.glScalef(1.0f, -1.0f, 1.0f); viewer.updateInverseRotation(gl); - gl.glEnable(GL.GL_REGISTER_COMBINERS_NV); + if (useRegisterCombiners) { + gl.glEnable(GL.GL_REGISTER_COMBINERS_NV); + } else { + gl.glBindProgramARB(GL.GL_FRAGMENT_PROGRAM_ARB, fragProg); + gl.glEnable(GL.GL_FRAGMENT_PROGRAM_ARB); + } gl.glColor3f(1.0f, 1.0f, 1.0f); @@ -394,7 +419,11 @@ public class VertexProgRefract { gl.glColorMask(true, true, true, false); } - gl.glDisable(GL.GL_REGISTER_COMBINERS_NV); + if (useRegisterCombiners) { + gl.glDisable(GL.GL_REGISTER_COMBINERS_NV); + } else { + gl.glDisable(GL.GL_FRAGMENT_PROGRAM_ARB); + } gl.glDisable(GL.GL_VERTEX_PROGRAM_ARB); gl.glMatrixMode(GL.GL_MODELVIEW); @@ -548,6 +577,47 @@ public class VertexProgRefract { gl.glFinalCombinerInputNV(GL.GL_VARIABLE_D_NV, GL.GL_ZERO, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB); } + private void initFragmentProgram(GL gl) { + int[] fragProgTmp = new int[1]; + gl.glGenProgramsARB(1, fragProgTmp); + fragProg = fragProgTmp[0]; + String combineFragProg = +"!!ARBfp1.0\n" + +"# compute refraction*(1-fresnel) + reflection*fresnel\n" + +"TEMP texSamp0, texSamp1;\n" + +"TEMP invFresnel;\n" + +"PARAM one = { 1.0, 1.0, 1.0, 1.0 };\n" + +"TEX texSamp0, fragment.texcoord[0], texture[0], CUBE;\n" + +"TEX texSamp1, fragment.texcoord[1], texture[1], CUBE;\n" + +"SUB invFresnel, one, fragment.color;\n" + +"MUL texSamp0, texSamp0, invFresnel;\n" + +"MUL texSamp1, texSamp1, fragment.color;\n" + +"ADD texSamp0, texSamp0, texSamp1;\n" + +"MOV result.color, texSamp0;\n" + +"END"; + + gl.glBindProgramARB (GL.GL_FRAGMENT_PROGRAM_ARB, fragProg); + gl.glProgramStringARB(GL.GL_FRAGMENT_PROGRAM_ARB, GL.GL_PROGRAM_FORMAT_ASCII_ARB, + combineFragProg.length(), combineFragProg); + int[] errPos = new int[1]; + gl.glGetIntegerv(GL.GL_PROGRAM_ERROR_POSITION_ARB, errPos); + if (errPos[0] >= 0) { + System.out.println("Fragment program failed to load:"); + String errMsg = gl.glGetString(GL.GL_PROGRAM_ERROR_STRING_ARB); + if (errMsg == null) { + System.out.println("[No error message available]"); + } else { + System.out.println("Error message: \"" + errMsg + "\""); + } + System.out.println("Error occurred at position " + errPos[0] + " in program:"); + int endPos = errPos[0]; + while (endPos < combineFragProg.length() && combineFragProg.charAt(endPos) != '\n') { + ++endPos; + } + System.out.println(combineFragProg.substring(errPos[0], endPos)); + } + } + private void drawSkyBox(GL gl, GLU glu) { // Compensates for ExaminerViewer's modification of modelview matrix gl.glMatrixMode(GL.GL_MODELVIEW); |