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/*
* GL_ARB_vertex_shader test application. Feeds a vertex shader with attributes that
* that have magic values and check if the values received by the shader are the same.
*
* Requires specific support on the GL implementation side. A special function printMESA()
* must be supported in the language that prints variable's current value of generic type
* to the appropriate shader's info log, and optionally to the screen.
*
* Perfectly valid behaviour produces output that does not have a line
* beginning with three stars (***).
*
* Author: Michal Krol
*/
#include "framework.h"
#define EPSILON 0.0001f
static GLhandleARB vert = 0;
static GLhandleARB prog = 0;
enum SUBMIT_MODE
{
SM_IM,
SM_VA,
SM_IM_DL,
SM_VA_DL,
SM_MAX
};
static enum SUBMIT_MODE submit_method = SM_IM;
#define C 0
#define S 1
#define N 2
#define V 3
#define T 4
#define F 5
#define A 6
struct ATTRIB_DATA
{
const char *name;
GLuint dispatch;
GLint index;
GLint bind;
GLuint size;
GLfloat data[4];
};
static struct ATTRIB_DATA attribs[] = {
{ "gl_Color", C, -1, -1, 4, { 4.2f, 0.56f, -2.1f, 0.29f } },
{ "gl_SecondaryColor", S, -1, -1, 4, { 0.38f, 2.0f, 0.99f, 1.0f } },
{ "gl_Normal", N, -1, -1, 3, { 54.0f, 77.0f, 1.15f, 0.0f } },
{ "gl_MultiTexCoord0", T, 0, -1, 4, { 11.1f, 11.2f, 11.3f, 11.4f } },
{ "gl_MultiTexCoord1", T, 1, -1, 4, { 22.1f, 22.2f, 22.3f, 22.4f } },
{ "gl_MultiTexCoord2", T, 2, -1, 4, { 33.1f, 33.2f, 33.3f, 33.4f } },
{ "gl_MultiTexCoord3", T, 3, -1, 4, { 44.1f, 44.2f, 44.3f, 44.4f } },
{ "gl_MultiTexCoord4", T, 4, -1, 4, { 55.1f, 55.2f, 55.3f, 55.4f } },
{ "gl_MultiTexCoord5", T, 5, -1, 4, { 66.1f, 66.2f, 66.3f, 66.4f } },
{ "gl_MultiTexCoord6", T, 6, -1, 4, { 77.1f, 77.2f, 77.3f, 77.4f } },
{ "gl_MultiTexCoord7", T, 7, -1, 4, { 88.1f, 88.2f, 88.3f, 88.4f } },
{ "gl_FogCoord", F, -1, -1, 1, { 0.63f, 0.0f, 0.0f, 0.0f } },
{ "Attribute1", A, 1, 1, 4, { 1.11f, 1.22f, 1.33f, 1.44f } },
{ "Attribute2", A, 2, 2, 4, { 2.11f, 2.22f, 2.33f, 2.44f } },
{ "Attribute3", A, 3, 3, 4, { 3.11f, 3.22f, 3.33f, 3.44f } },
{ "Attribute4", A, 4, 4, 1, { 4.11f, 0.0f, 0.0f, 0.0f } },
{ "Attribute5", A, 5, 5, 2, { 5.11f, 5.22f, 0.0f, 0.0f } },
{ "Attribute6", A, 6, 6, 3, { 6.11f, 6.22f, 6.33f, 0.0f } },
{ "Attribute7", A, 7, 7, 2, { 7.11f, 7.22f, 0.0f, 0.0f } },
{ "Attribute7", A, 8, -1, 2, { 8.11f, 8.22f, 0.0f, 0.0f } },
{ "Attribute9", A, 9, 9, 3, { 9.11f, 9.22f, 9.33f, 0.0f } },
{ "Attribute9", A, 10, -1, 3, { 10.11f, 10.22f, 10.33f, 0.0f } },
{ "Attribute9", A, 11, -1, 3, { 11.11f, 11.22f, 11.33f, 0.0f } },
{ "Attribute12", A, 12, 12, 4, { 12.11f, 12.22f, 12.33f, 12.44f } },
{ "Attribute12", A, 13, -1, 4, { 13.11f, 13.22f, 13.33f, 13.44f } },
{ "Attribute12", A, 14, -1, 4, { 14.11f, 14.22f, 14.33f, 14.44f } },
{ "Attribute12", A, 15, -1, 4, { 15.11f, 15.22f, 15.33f, 15.44f } },
{ "gl_Vertex", V, 16, -1, 4, { 0.25f, -0.14f, 0.01f, 1.0f } }
};
static void im_render ()
{
GLint i;
glBegin (GL_POINTS);
for (i = 0; i < sizeof (attribs) / sizeof (*attribs); i++) {
struct ATTRIB_DATA *att = &attribs[i];
switch (att->dispatch)
{
case C:
glColor4fv (att->data);
break;
case S:
glSecondaryColor3fvEXT (att->data);
break;
case N:
glNormal3fv (att->data);
break;
case V:
glVertex4fv (att->data);
break;
case T:
assert (att->index >= 0 && att->index < 8);
glMultiTexCoord4fvARB (GL_TEXTURE0_ARB + att->index, att->data);
break;
case F:
glFogCoordfvEXT (att->data);
break;
case A:
assert (att->index > 0 && att->index < 16);
glVertexAttrib4fvARB (att->index, att->data);
break;
default:
assert (0);
}
}
glEnd ();
}
static void va_render ()
{
GLint i;
for (i = 0; i < sizeof (attribs) / sizeof (*attribs); i++) {
struct ATTRIB_DATA *att = &attribs[i];
switch (att->dispatch)
{
case C:
glColorPointer (4, GL_FLOAT, 0, att->data);
glEnable (GL_COLOR_ARRAY);
break;
case S:
glSecondaryColorPointerEXT (4, GL_FLOAT, 0, att->data);
glEnable (GL_SECONDARY_COLOR_ARRAY_EXT);
break;
case N:
glNormalPointer (GL_FLOAT, 0, att->data);
glEnable (GL_NORMAL_ARRAY);
break;
case V:
glVertexPointer (4, GL_FLOAT, 0, att->data);
glEnable (GL_VERTEX_ARRAY);
break;
case T:
assert (att->index >= 0 && att->index < 8);
glClientActiveTextureARB (GL_TEXTURE0_ARB + att->index);
glTexCoordPointer (4, GL_FLOAT, 0, att->data);
glEnable (GL_TEXTURE_COORD_ARRAY);
break;
case F:
glFogCoordPointerEXT (GL_FLOAT, 0, att->data);
glEnable (GL_FOG_COORDINATE_ARRAY_EXT);
break;
case A:
assert (att->index > 0 && att->index < 16);
glVertexAttribPointerARB (att->index, 4, GL_FLOAT, GL_FALSE, 0, att->data);
glEnableVertexAttribArrayARB (att->index);
break;
default:
assert (0);
}
}
glDrawArrays (GL_POINTS, 0, 1);
for (i = 0; i < sizeof (attribs) / sizeof (*attribs); i++) {
struct ATTRIB_DATA *att = &attribs[i];
switch (att->dispatch)
{
case C:
glDisable (GL_COLOR_ARRAY);
break;
case S:
glDisable (GL_SECONDARY_COLOR_ARRAY_EXT);
break;
case N:
glDisable (GL_NORMAL_ARRAY);
break;
case V:
glDisable (GL_VERTEX_ARRAY);
break;
case T:
glClientActiveTextureARB (GL_TEXTURE0_ARB + att->index);
glDisable (GL_TEXTURE_COORD_ARRAY);
break;
case F:
glDisable (GL_FOG_COORDINATE_ARRAY_EXT);
break;
case A:
glDisableVertexAttribArrayARB (att->index);
break;
default:
assert (0);
}
}
}
static void dl_start ()
{
glNewList (GL_COMPILE, 1);
}
static void dl_end ()
{
glEndList ();
glCallList (1);
}
static void load_test_file (const char *filename)
{
FILE *f;
long size;
char *code;
GLint i;
f = fopen (filename, "r");
if (f == NULL)
return;
fseek (f, 0, SEEK_END);
size = ftell (f);
fseek (f, 0, SEEK_SET);
code = (char *) (malloc (size));
if (code == NULL) {
fclose (f);
return;
}
size = fread (code, 1, size, f);
fclose (f);
glShaderSourceARB (vert, 1, &code, &size);
glCompileShaderARB (vert);
if (!CheckObjectStatus (vert))
exit (0);
for (i = 0; i < sizeof (attribs) / sizeof (*attribs); i++)
if (attribs[i].dispatch == A && attribs[i].bind != -1)
glBindAttribLocationARB (prog, attribs[i].bind, attribs[i].name);
}
void InitScene (void)
{
prog = glCreateProgramObjectARB ();
vert = glCreateShaderObjectARB (GL_VERTEX_SHADER_ARB);
glAttachObjectARB (prog, vert);
glDeleteObjectARB (vert);
load_test_file ("vstest.txt");
glLinkProgramARB (prog);
if (!CheckObjectStatus (prog))
exit (0);
glUseProgramObjectARB (prog);
}
void RenderScene (void)
{
GLint info_length, length;
char output[65000], *p;
GLint i;
if (submit_method == SM_MAX)
exit (0);
/*
* Get the current size of the info log. Any text output produced by executed
* shader will be appended to the end of log.
*/
glGetObjectParameterivARB (vert, GL_OBJECT_INFO_LOG_LENGTH_ARB, &info_length);
switch (submit_method)
{
case SM_IM:
printf ("\n--- TESTING IMMEDIATE MODE\n");
im_render ();
break;
case SM_VA:
printf ("\n--- TESTING VERTEX ARRAY MODE\n");
va_render ();
break;
case SM_IM_DL:
printf ("\n--- TESTING IMMEDIATE + DISPLAY LIST MODE\n");
dl_start ();
im_render ();
dl_end ();
break;
case SM_VA_DL:
printf ("\n--- TESTING VERTEX ARRAY + DISPLAY LIST MODE\n");
dl_start ();
va_render ();
dl_end ();
break;
default:
assert (0);
}
glFlush ();
/*
* Get the info log and set the pointer to the beginning of the output.
*/
glGetInfoLogARB (vert, sizeof (output), &length, output);
p = output + info_length - 1;
for (i = 0; i < sizeof (attribs) / sizeof (*attribs); i++) {
GLuint j;
for (j = 0; j < attribs[i].size; j++) {
GLfloat value;
if (p == NULL) {
printf ("*** %s\n", "I/O error");
break;
}
if (strncmp (p, "true", 4) == 0)
value = 1.0f;
else if (strncmp (p, "false", 5) == 0)
value = 0.0f;
else if (sscanf (p, "%f", &value) != 1) {
printf ("*** %s\n", "I/O error");
p = NULL;
break;
}
if (fabs (value - attribs[i].data[j]) > EPSILON)
printf ("*** %s\n", "Values are different");
p = strchr (p, '\n');
if (p != NULL)
p++;
}
if (p == NULL)
break;
}
submit_method++;
}
int main (int argc, char *argv[])
{
InitFramework (&argc, argv);
return 0;
}
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