diff options
Diffstat (limited to 'progs/trivial/vp-array-hf.c')
| -rw-r--r-- | progs/trivial/vp-array-hf.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/progs/trivial/vp-array-hf.c b/progs/trivial/vp-array-hf.c deleted file mode 100644 index f812436437..0000000000 --- a/progs/trivial/vp-array-hf.c +++ /dev/null @@ -1,215 +0,0 @@ -/* Test glGenProgramsNV(), glIsProgramNV(), glLoadProgramNV() */ - -#include <assert.h> -#include <string.h> -#include <stdio.h> -#include <stdlib.h> -#include <math.h> -#include <GL/glew.h> -#include <GL/glut.h> - -typedef union { GLfloat f; GLint i; } fi_type; -/** - * Convert a 4-byte float to a 2-byte half float. - * Based on code from: - * http://www.opengl.org/discussion_boards/ubb/Forum3/HTML/008786.html - */ -static GLhalf -_mesa_float_to_half(GLfloat val) -{ - - const fi_type fi = {val}; - const int flt_m = fi.i & 0x7fffff; - const int flt_e = (fi.i >> 23) & 0xff; - const int flt_s = (fi.i >> 31) & 0x1; - int s, e, m = 0; - GLhalf result; - - /* sign bit */ - s = flt_s; - - /* handle special cases */ - if ((flt_e == 0) && (flt_m == 0)) { - /* zero */ - /* m = 0; - already set */ - e = 0; - } - else if ((flt_e == 0) && (flt_m != 0)) { - /* denorm -- denorm float maps to 0 half */ - /* m = 0; - already set */ - e = 0; - } - else if ((flt_e == 0xff) && (flt_m == 0)) { - /* infinity */ - /* m = 0; - already set */ - e = 31; - } - else if ((flt_e == 0xff) && (flt_m != 0)) { - /* NaN */ - m = 1; - e = 31; - } - else { - /* regular number */ - const int new_exp = flt_e - 127; - if (new_exp < -24) { - /* this maps to 0 */ - /* m = 0; - already set */ - e = 0; - } - else if (new_exp < -14) { - /* this maps to a denorm */ - unsigned int exp_val = (unsigned int) (-14 - new_exp); /* 2^-exp_val*/ - e = 0; - switch (exp_val) { - case 0: - /* m = 0; - already set */ - break; - case 1: m = 512 + (flt_m >> 14); break; - case 2: m = 256 + (flt_m >> 15); break; - case 3: m = 128 + (flt_m >> 16); break; - case 4: m = 64 + (flt_m >> 17); break; - case 5: m = 32 + (flt_m >> 18); break; - case 6: m = 16 + (flt_m >> 19); break; - case 7: m = 8 + (flt_m >> 20); break; - case 8: m = 4 + (flt_m >> 21); break; - case 9: m = 2 + (flt_m >> 22); break; - case 10: m = 1; break; - } - } - else if (new_exp > 15) { - /* map this value to infinity */ - /* m = 0; - already set */ - e = 31; - } - else { - /* regular */ - e = new_exp + 15; - m = flt_m >> 13; - } - } - - result = (s << 15) | (e << 10) | m; - return result; -} - - -GLfloat verts[][4] = { - { 0.9, -0.9, 0.0, 1.0 }, - { 0.9, 0.9, 0.0, 1.0 }, - { -0.9, 0.9, 0.0, 1.0 }, - { -0.9, -0.9, 0.0, 1.0 }, -}; - -GLhalf hverts[16]; - -GLubyte color[][4] = { - { 0x00, 0x00, 0xff, 0x00 }, - { 0x00, 0xff, 0x00, 0x00 }, - { 0xff, 0x00, 0x00, 0x00 }, - { 0xff, 0xff, 0xff, 0x00 }, -}; - -GLuint indices[] = { 0, 1, 2, 3 }; - -static void Init( void ) -{ - GLint errno; - GLuint prognum; - GLuint i, j; - - static const char *prog1 = - "!!ARBvp1.0\n" - "MOV result.color, vertex.color;\n" - "MOV result.position, vertex.position;\n" - "END\n"; - - if (!glutExtensionSupported("GL_ARB_half_float_vertex")) { - printf("GL_ARB_half_float_vertex not found!\n"); - exit(0); - } - - glGenProgramsARB(1, &prognum); - glBindProgramARB(GL_VERTEX_PROGRAM_ARB, prognum); - glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, - strlen(prog1), (const GLubyte *) prog1); - - assert(glIsProgramARB(prognum)); - errno = glGetError(); - printf("glGetError = %d\n", errno); - if (errno != GL_NO_ERROR) - { - GLint errorpos; - - glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos); - printf("errorpos: %d\n", errorpos); - printf("%s\n", (char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB)); - } - - for (i = 0; i < 4; i++) - for (j = 0; j < 4; j++) - hverts[i * 4 + j] = _mesa_float_to_half(verts[i][j]); - - glEnableClientState( GL_VERTEX_ARRAY ); - glEnableClientState( GL_COLOR_ARRAY ); - glVertexPointer( 4, GL_HALF_FLOAT, 8, hverts ); - glColorPointer( 4, GL_UNSIGNED_BYTE, 0, color ); - -} - - - -static void Display( void ) -{ - glClearColor(0.3, 0.3, 0.3, 1); - glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); - - glEnable(GL_VERTEX_PROGRAM_NV); - glDrawElements( GL_TRIANGLES, 3, GL_UNSIGNED_INT, indices ); - - glFlush(); -} - - -static void Reshape( int width, int height ) -{ - glViewport( 0, 0, width, height ); - glMatrixMode( GL_PROJECTION ); - glLoadIdentity(); - glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); - glMatrixMode( GL_MODELVIEW ); - glLoadIdentity(); - /*glTranslatef( 0.0, 0.0, -15.0 );*/ -} - - -static void Key( unsigned char key, int x, int y ) -{ - (void) x; - (void) y; - switch (key) { - case 27: - exit(0); - break; - } - glutPostRedisplay(); -} - - - - -int main( int argc, char *argv[] ) -{ - glutInit( &argc, argv ); - glutInitWindowPosition( 0, 0 ); - glutInitWindowSize( 250, 250 ); - glutInitDisplayMode( GLUT_RGB | GLUT_SINGLE | GLUT_DEPTH ); - glutCreateWindow(argv[0]); - glewInit(); - glutReshapeFunc( Reshape ); - glutKeyboardFunc( Key ); - glutDisplayFunc( Display ); - Init(); - glutMainLoop(); - return 0; -} |