#include <GL/glut.h>
+/*
+ * Print the string with line numbers
+ */
+static void list_program(const GLubyte *string, GLsizei len)
+{
+ const char *c = (const char *) string;
+ int i, line = 1, printNumber = 1;
+
+ for (i = 0; i < len; i++) {
+ if (printNumber) {
+ printf("%3d ", line);
+ printNumber = 0;
+ }
+ if (*c == '\n') {
+ line++;
+ printNumber = 1;
+ }
+ putchar(*c);
+ c++;
+ }
+ putchar('\n');
+}
+
+/*
+ * Return the line number and column number that corresponds to the
+ * given program position. Also return a null-terminated copy of that
+ * line of the program string.
+ */
static const GLubyte *
find_line_column(const GLubyte *string, const GLubyte *pos,
GLint *line, GLint *col)
}
+#define ARB_VERTEX_PROGRAM 1
+#define ARB_FRAGMENT_PROGRAM 2
+#define NV_VERTEX_PROGRAM 3
+#define NV_FRAGMENT_PROGRAM 4
+
+
+/*
+ * Interactive debugger
+ */
+static void Debugger2(GLenum target, GLvoid *data)
+{
+ static GLboolean continueFlag = GL_FALSE;
+ const GLubyte *ln;
+ GLint pos, line, column;
+ GLint id;
+ int progType;
+ GLint len;
+ GLubyte *program;
+
+ /* Sigh, GL_VERTEX_PROGRAM_ARB == GL_VERTEX_PROGRAM_NV so it's a bit
+ * hard to distinguish between them.
+ */
+ if (target == GL_FRAGMENT_PROGRAM_ARB)
+ progType = ARB_FRAGMENT_PROGRAM;
+ else if (target == GL_FRAGMENT_PROGRAM_NV)
+ progType = NV_FRAGMENT_PROGRAM;
+ else
+ progType = NV_VERTEX_PROGRAM;
+
+
+ if (continueFlag)
+ return;
+
+ /* Get id of the program and current position */
+ switch (progType) {
+ case ARB_FRAGMENT_PROGRAM:
+ glGetProgramivARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_BINDING_ARB, &id);
+ glGetIntegerv(GL_FRAGMENT_PROGRAM_POSITION_MESA, &pos);
+ break;
+ case NV_FRAGMENT_PROGRAM:
+ glGetIntegerv(GL_FRAGMENT_PROGRAM_BINDING_NV, &id);
+ glGetIntegerv(GL_FRAGMENT_PROGRAM_POSITION_MESA, &pos);
+ break;
+ case ARB_VERTEX_PROGRAM:
+ glGetProgramivARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_BINDING_ARB, &id);
+ glGetIntegerv(GL_VERTEX_PROGRAM_POSITION_MESA, &pos);
+ break;
+ case NV_VERTEX_PROGRAM:
+ glGetIntegerv(GL_VERTEX_PROGRAM_BINDING_NV, &id);
+ glGetIntegerv(GL_VERTEX_PROGRAM_POSITION_MESA, &pos);
+ break;
+ default:
+ abort();
+ }
+
+ /* get program string */
+ if (progType == ARB_VERTEX_PROGRAM ||
+ progType == ARB_FRAGMENT_PROGRAM)
+ glGetProgramivARB(target, GL_PROGRAM_LENGTH_ARB, &len);
+ else
+ glGetProgramivNV(id, GL_PROGRAM_LENGTH_NV, &len);
+ program = malloc(len + 1);
+ if (progType == ARB_VERTEX_PROGRAM ||
+ progType == ARB_FRAGMENT_PROGRAM)
+ glGetProgramStringARB(target, GL_PROGRAM_STRING_ARB, program);
+ else
+ glGetProgramStringNV(id, GL_PROGRAM_STRING_NV, program);
+
+
+ /* Get current line number, column, line string */
+ ln = find_line_column(program, program + pos, &line, &column);
+
+ printf("%d: %s\n", line, ln);
+
+ /* get commands from stdin */
+ while (1) {
+ char command[1000], *cmd;
+
+ /* print prompt and get command */
+ printf("(%s %d) ", (target == GL_VERTEX_PROGRAM_ARB ? "vert" : "frag"),
+ line);
+ fgets(command, 999, stdin);
+
+ /* skip leading whitespace */
+ for (cmd = command; cmd[0] == ' '; cmd++)
+ ;
+
+ if (!cmd[0])
+ /* nothing (repeat the previous cmd?) */
+ continue;
+
+ switch (cmd[0]) {
+ case 's':
+ case 'n':
+ /* step / next */
+ return;
+ case 'c':
+ continueFlag = GL_TRUE;
+ return;
+ case 'd':
+ /* dump machine state */
+ if (progType == NV_FRAGMENT_PROGRAM) {
+ static const char *inRegs[] = {
+ "f[WPOS]", "f[COL0]", "f[COL1]", "f[FOGC]",
+ "f[TEX0]", "f[TEX1]", "f[TEX2]", "f[TEX3]",
+ NULL
+ };
+ static const char *outRegs[] = {
+ "o[COLR]", "o[COLH]", "o[DEPR]", NULL
+ };
+ GLfloat v[4];
+ int i;
+ printf("Fragment input attributes:\n");
+ for (i = 0; inRegs[i]; i++) {
+ glGetProgramRegisterfvMESA(GL_FRAGMENT_PROGRAM_NV,
+ strlen(inRegs[i]),
+ (const GLubyte *) inRegs[i], v);
+ printf(" %s: %g, %g, %g, %g\n", inRegs[i],
+ v[0], v[1], v[2], v[3]);
+ }
+ printf("Fragment output attributes:\n");
+ for (i = 0; outRegs[i]; i++) {
+ glGetProgramRegisterfvMESA(GL_FRAGMENT_PROGRAM_NV,
+ strlen(outRegs[i]),
+ (const GLubyte *) outRegs[i], v);
+ printf(" %s: %g, %g, %g, %g\n", outRegs[i],
+ v[0], v[1], v[2], v[3]);
+ }
+ printf("Temporaries:\n");
+ for (i = 0; i < 4; i++) {
+ char temp[100];
+ GLfloat v[4];
+ sprintf(temp, "R%d", i);
+ glGetProgramRegisterfvMESA(GL_FRAGMENT_PROGRAM_NV,
+ strlen(temp),
+ (const GLubyte *) temp, v);
+ printf(" %s: %g, %g, %g, %g\n", temp, v[0],v[1],v[2],v[3]);
+ }
+ }
+ else if (progType == NV_VERTEX_PROGRAM) {
+ GLfloat v[4];
+ int i;
+ static const char *inRegs[] = {
+ "v[OPOS]", "v[WGHT]", "v[NRML]", "v[COL0]",
+ "v[COL1]", "v[FOGC]", "v[6]", "v[7]",
+ "v[TEX0]", "v[TEX1]", "v[TEX2]", "v[TEX3]",
+ "v[TEX4]", "v[TEX5]", "v[TEX6]", "v[TEX7]",
+ NULL
+ };
+ static const char *outRegs[] = {
+ "o[HPOS]", "o[COL0]", "o[COL1]", "o[BFC0]",
+ "o[BFC1]", "o[FOGC]", "o[PSIZ]",
+ "o[TEX0]", "o[TEX1]", "o[TEX2]", "o[TEX3]",
+ "o[TEX4]", "o[TEX5]", "o[TEX6]", "o[TEX7]",
+ NULL
+ };
+ printf("Vertex input attributes:\n");
+ for (i = 0; inRegs[i]; i++) {
+ glGetProgramRegisterfvMESA(GL_VERTEX_PROGRAM_NV,
+ strlen(inRegs[i]),
+ (const GLubyte *) inRegs[i], v);
+ printf(" %s: %g, %g, %g, %g\n", inRegs[i],
+ v[0], v[1], v[2], v[3]);
+ }
+ printf("Vertex output attributes:\n");
+ for (i = 0; outRegs[i]; i++) {
+ glGetProgramRegisterfvMESA(GL_VERTEX_PROGRAM_NV,
+ strlen(outRegs[i]),
+ (const GLubyte *) outRegs[i], v);
+ printf(" %s: %g, %g, %g, %g\n", outRegs[i],
+ v[0], v[1], v[2], v[3]);
+ }
+ printf("Temporaries:\n");
+ for (i = 0; i < 4; i++) {
+ char temp[100];
+ GLfloat v[4];
+ sprintf(temp, "R%d", i);
+ glGetProgramRegisterfvMESA(GL_VERTEX_PROGRAM_NV,
+ strlen(temp),
+ (const GLubyte *) temp, v);
+ printf(" %s: %g, %g, %g, %g\n", temp, v[0],v[1],v[2],v[3]);
+ }
+ }
+ break;
+ case 'l':
+ /* list */
+ list_program(program, len);
+ break;
+ case 'p':
+ /* print */
+ {
+ GLfloat v[4];
+ char *c;
+ cmd++;
+ while (*cmd == ' ')
+ cmd++;
+ c = cmd;
+ while (*c) {
+ if (*c == '\n' || *c == '\r')
+ *c = 0;
+ else
+ c++;
+ }
+ glGetProgramRegisterfvMESA(target, strlen(cmd),
+ (const GLubyte *) cmd, v);
+ if (glGetError() == GL_NO_ERROR)
+ printf("%s = %g, %g, %g, %g\n", cmd, v[0], v[1], v[2], v[3]);
+ else
+ printf("Invalid expression\n");
+ }
+ break;
+ case 'b':
+ /* break */
+ /* break at line number */
+ /* break at screen pixel (x,y) */
+ /* break if condition is true */
+ printf("Breakpoints not implemented yet.\n");
+ break;
+ case 'h':
+ /* help */
+ printf("Debugger commands:\n");
+ printf(" s step n next c continue\n");
+ printf(" d dump regs h help l list\n");
+ printf(" b break p print\n");
+ break;
+ default:
+ printf("Unknown command: %c\n", cmd[0]);
+ }
+ }
+}
+
+
+/*
+ * Print current line, some registers, and continue.
+ */
static void Debugger(GLenum target, GLvoid *data)
{
GLint pos;
}
-static void Init( void )
+static void Init( int argc, char *argv[] )
{
static const char *fragProgramText =
"!!FP1.0\n"
printf("Press p to toggle between per-pixel and per-vertex lighting\n");
#ifdef GL_MESA_program_debug
- glProgramCallbackMESA(GL_FRAGMENT_PROGRAM_ARB, Debugger,
- (GLvoid *) fragProgramText);
- glEnable(GL_FRAGMENT_PROGRAM_CALLBACK_MESA);
+ if (argc > 1 && strcmp(argv[1], "fragment") == 0) {
+ printf(">> Debugging fragment program\n");
+ glProgramCallbackMESA(GL_FRAGMENT_PROGRAM_ARB, Debugger2,
+ (GLvoid *) fragProgramText);
+ glEnable(GL_FRAGMENT_PROGRAM_CALLBACK_MESA);
+ }
+ else {
+ printf(">> Debugging vertex program\n");
+ glProgramCallbackMESA(GL_VERTEX_PROGRAM_ARB, Debugger2,
+ (GLvoid *) fragProgramText);
+ glEnable(GL_VERTEX_PROGRAM_CALLBACK_MESA);
+ }
#endif
}
glutDisplayFunc( Display );
if (Anim)
glutIdleFunc(Idle);
- Init();
+ Init(argc, argv);
glutMainLoop();
return 0;
}
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