diff options
Diffstat (limited to 'progs/tests/arbfptrig.c')
-rw-r--r-- | progs/tests/arbfptrig.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/progs/tests/arbfptrig.c b/progs/tests/arbfptrig.c new file mode 100644 index 000000000..26b68c6b4 --- /dev/null +++ b/progs/tests/arbfptrig.c @@ -0,0 +1,156 @@ +/* GL_ARB_fragment_program texture test */ + +#include <assert.h> +#include <string.h> +#include <stdio.h> +#include <stdlib.h> +#include <math.h> +#define GL_GLEXT_PROTOTYPES +#include <GL/glut.h> + +#include "readtex.c" + + +#define TEXTURE_FILE "../images/girl.rgb" + +static GLfloat Xrot = 0.0, Yrot = 0.0, Zrot = 0.0; + +#define PI 3.141592 + +static void Display( void ) +{ + glClear( GL_COLOR_BUFFER_BIT ); + + glPushMatrix(); + glRotatef(Xrot, 1.0, 0.0, 0.0); + glRotatef(Yrot, 0.0, 1.0, 0.0); + glRotatef(Zrot, 0.0, 0.0, 1.0); + + glBegin(GL_POLYGON); + glTexCoord2f(-PI, 0); glVertex2f(-1, -1); + glTexCoord2f(PI, 0); glVertex2f( 1, -1); + glTexCoord2f(PI, 1); glVertex2f( 1, 1); + glTexCoord2f(-PI, 1); glVertex2f(-1, 1); + glEnd(); + + glPopMatrix(); + + glutSwapBuffers(); +} + + +static void Reshape( int width, int height ) +{ + glViewport( 0, 0, width, height ); + glMatrixMode( GL_PROJECTION ); + glLoadIdentity(); + glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 ); + glMatrixMode( GL_MODELVIEW ); + glLoadIdentity(); + glTranslatef( 0.0, 0.0, -8.0 ); +} + + +static void SpecialKey( int key, int x, int y ) +{ + float step = 3.0; + (void) x; + (void) y; + + switch (key) { + case GLUT_KEY_UP: + Xrot += step; + break; + case GLUT_KEY_DOWN: + Xrot -= step; + break; + case GLUT_KEY_LEFT: + Yrot += step; + break; + case GLUT_KEY_RIGHT: + Yrot -= step; + break; + } + glutPostRedisplay(); +} + + +static void Key( unsigned char key, int x, int y ) +{ + (void) x; + (void) y; + switch (key) { + case 27: + exit(0); + break; + } + glutPostRedisplay(); +} + + +static void Init( void ) +{ + static const char *modulate2D = + "!!ARBfp1.0\n" + "TEMP R0;\n" + "MOV R0, {0,0,0,1};\n" + "SCS R0, fragment.texcoord[0].x; \n" + "ADD R0, R0, {1.0}.x;\n" + "MUL R0, R0, {0.5}.x;\n" + "MOV result.color, R0; \n" + "END" + ; + GLuint modulateProg; + GLuint Texture; + + if (!glutExtensionSupported("GL_ARB_fragment_program")) { + printf("Error: GL_ARB_fragment_program not supported!\n"); + exit(1); + } + printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); + + /* Setup the fragment program */ + glGenProgramsARB(1, &modulateProg); + glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, modulateProg); + glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, + strlen(modulate2D), (const GLubyte *)modulate2D); + + printf("glGetError = 0x%x\n", (int) glGetError()); + printf("glError(GL_PROGRAM_ERROR_STRING_ARB) = %s\n", + (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB)); + assert(glIsProgramARB(modulateProg)); + + glEnable(GL_FRAGMENT_PROGRAM_ARB); + + /* Load texture */ + glGenTextures(1, &Texture); + glBindTexture(GL_TEXTURE_2D, Texture); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) { + printf("Error: couldn't load texture image file %s\n", TEXTURE_FILE); + exit(1); + } + /* XXX this enable shouldn't really be needed!!! */ + glEnable(GL_TEXTURE_2D); + + glClearColor(.3, .3, .3, 0); +} + + +int main( int argc, char *argv[] ) +{ + glutInit( &argc, argv ); + glutInitWindowPosition( 0, 0 ); + glutInitWindowSize( 250, 250 ); + glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH ); + glutCreateWindow(argv[0]); + glutReshapeFunc( Reshape ); + glutKeyboardFunc( Key ); + glutSpecialFunc( SpecialKey ); + glutDisplayFunc( Display ); + Init(); + glutMainLoop(); + return 0; +} |