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* GL_ARB_shading_language_100 test application.
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* Tests correctness of emited code. Runs multiple well-formed shaders and checks if
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* they produce valid results.
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* Requires specific support on the GL implementation side. A special function printMESA()
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* must be supported in the language that prints current values of generic type
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* to the appropriate shader's info log, and optionally to the screen.
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#include "framework.h"
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#define EPSILON 0.0001f
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static GLhandleARB vert = 0;
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static GLhandleARB prog = 0;
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static int get_line (FILE *f, char *line, int size)
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if (fgets (line, size, f) == NULL)
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if (line[strlen (line) - 1] == '\n')
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line[strlen (line) - 1] = '\0';
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struct ATTRIB attrib[32];
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enum SHADER_LOAD_STATE
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struct ATTRIBS attribs;
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enum PROGRAM_LOAD_STATE
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static struct PROGRAM *program = NULL;
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static void load_test_file (const char *filename, struct PROGRAM **program)
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struct PROGRAM **currprog = program;
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enum PROGRAM_LOAD_STATE pls = PLS_NONE;
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enum SHADER_LOAD_STATE sls = SLS_NONE;
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f = fopen (filename, "r");
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while (get_line (f, line, sizeof (line))) {
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if (strncmp (line + 1, "program", 7) == 0) {
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if (*currprog != NULL)
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currprog = &(**currprog).next;
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*currprog = (struct PROGRAM *) (malloc (sizeof (struct PROGRAM)));
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if (*currprog == NULL)
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(**currprog).next = NULL;
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strcpy ((**currprog).name, line + 9);
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(**currprog).attribs.count = 0;
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(**currprog).vertex.code[0] = '\0';
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(**currprog).vertex.count = 0;
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else if (strncmp (line + 1, "attrib", 6) == 0) {
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if (*currprog == NULL)
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strcpy ((**currprog).attribs.attrib[(**currprog).attribs.count].name, line + 8);
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(**currprog).attribs.attrib[(**currprog).attribs.count].count = 0;
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(**currprog).attribs.count++;
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else if (strcmp (line + 1, "vertex") == 0) {
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if (*currprog == NULL)
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else if (strcmp (line + 1, "code") == 0) {
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if (*currprog == NULL || pls != PLS_VERTEX)
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else if (strcmp (line + 1, "output") == 0) {
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if (*currprog == NULL || pls != PLS_VERTEX)
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if ((*currprog == NULL || pls == PLS_NONE || sls == SLS_NONE) && line[0] != '\0')
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if (*currprog != NULL && pls == PLS_VERTEX) {
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if (sls == SLS_CODE) {
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strcat ((**currprog).vertex.code, line);
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strcat ((**currprog).vertex.code, "\n");
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else if (sls == SLS_OUTPUT && line[0] != '\0') {
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if (strcmp (line, "true") == 0)
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(**currprog).vertex.output[(**currprog).vertex.count] = 1.0f;
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else if (strcmp (line, "false") == 0)
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(**currprog).vertex.output[(**currprog).vertex.count] = 0.0f;
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sscanf (line, "%f", &(**currprog).vertex.output[(**currprog).vertex.count]);
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(**currprog).vertex.count++;
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else if (*currprog != NULL && pls == PLS_ATTRIB && line[0] != '\0') {
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struct ATTRIB *att = &(**currprog).attribs.attrib[(**currprog).attribs.count - 1];
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GLfloat *vec = att->value[att->count];
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sscanf (line, "%f %f %f %f", &vec[0], &vec[1], &vec[2], &vec[3]);
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void InitScene (void)
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prog = glCreateProgramObjectARB ();
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vert = glCreateShaderObjectARB (GL_VERTEX_SHADER_ARB);
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glAttachObjectARB (prog, vert);
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glDeleteObjectARB (vert);
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load_test_file ("cltest.txt", &program);
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void RenderScene (void)
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struct PROGRAM *nextprogram;
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GLint info_length, length;
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char output[65000], *p;
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code = program->vertex.code;
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glShaderSourceARB (vert, 1, (const GLcharARB **) (&code), NULL);
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glCompileShaderARB (vert);
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CheckObjectStatus (vert);
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for (i = 0; i < program->attribs.count; i++) {
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const char *name = program->attribs.attrib[i].name;
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if (strcmp (name, "gl_Vertex") != 0)
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glBindAttribLocationARB (prog, i, name);
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glLinkProgramARB (prog);
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CheckObjectStatus (prog);
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glUseProgramObjectARB (prog);
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printf ("\n--- %s\n", program->name);
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glGetObjectParameterivARB (vert, GL_OBJECT_INFO_LOG_LENGTH_ARB, &info_length);
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if (program->attribs.count == 0) {
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glVertex2f (0.0f, 0.0f);
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for (i = 0; i < program->attribs.attrib[0].count; i++) {
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for (j = 0; j < program->attribs.count; j++) {
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GLuint n = (j + 1) % program->attribs.count;
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GLfloat *vec = program->attribs.attrib[n].value[i];
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const char *name = program->attribs.attrib[n].name;
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if (strcmp (name, "gl_Vertex") == 0)
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glVertexAttrib4fvARB (n, vec);
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glGetInfoLogARB (vert, sizeof (output), &length, output);
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p = output + info_length - 1;
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for (i = 0; i < program->vertex.count; i++) {
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printf ("*** %s\n", "I/O error");
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if (strncmp (p, "true", 4) == 0)
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else if (strncmp (p, "false", 5) == 0)
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else if (sscanf (p, "%f", &value) != 1) {
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printf ("*** %s\n", "I/O error");
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if (fabs (value - program->vertex.output[i]) > EPSILON) {
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printf ("*** Values are different, is %f, should be %f\n", value,
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program->vertex.output[i]);
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p = strchr (p, '\n');
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printf ("*** %s\n", "I/O error");
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nextprogram = program->next;
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program = nextprogram;
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int main (int argc, char *argv[])
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InitFramework (&argc, argv);