Attachment 57659 Details for Bug 46644 – Test program variant exhibiting the issue

Test program variant exhibiting the issue

tri-tex.c (text/x-csrc), 3.25 KB, created by Frank Richter on 2012-02-26 05:46:29 UTC

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Filename:

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Creator: Frank Richter

Created: 2012-02-26 05:46:29 UTC

Size: 3.25 KB

patch

obsolete

>
>#include <assert.h>
>#include <stdio.h>
>#include <string.h>
>#include <stdlib.h>
>#include <GL/glew.h>
>#include <GL/glut.h>
>
>#include "readtex.c"
>
>
>#define TEXTURE_FILE "../images/girl.rgb"
>
>
>
>static void Init( void )
>{
>#define MODE	2
>	
>   static const char *modulate2D =
>      "!!ARBfp1.0\n"
>	"TEMP tc;\n"
>	"TEMP tc_iw;\n"
>	"TEMP inv_w;\n"
>	#if MODE == 0
>	/* Manual division by W: works as expected */
>	"RCP inv_w, tc.w;\n"
>	"MUL tc_iw, tc, inv_w;\n"
>      "TEX result.color, tc_iw, texture[0], 2D; \n"
>	#elif MODE == 1
>	/* TXP from temp reg: works as expected */
>	"MOV tc, fragment.color;\n"
>      "TXP result.color, tc, texture[0], 2D; \n"
>	/* TXP from fragment.color: does not work */
>	#elif MODE == 2
>      "TXP result.color, fragment.color, texture[0], 2D; \n"
>	#endif
>      "END"
>      ;
>   GLuint modulateProg;
>   GLuint Texture;
>
>   if (!GLEW_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);
>}
>
>static void Reshape(int width, int height)
>{
>
>    glViewport(0, 0, (GLint)width, (GLint)height);
>
>    glMatrixMode(GL_PROJECTION);
>    glLoadIdentity();
>    glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
>    glMatrixMode(GL_MODELVIEW);
>}
>
>static void Key(unsigned char key, int x, int y)
>{
>
>    switch (key) {
>      case 27:
>	exit(1);
>      default:
>	break;
>    }
>
>    glutPostRedisplay();
>}
>
>static void Draw(void)
>{
>   glClear(GL_COLOR_BUFFER_BIT); 
>
>   glBegin(GL_TRIANGLES);
>   glColor4f(0,0,0.5,0.5); 
>/*    glTexCoord2f(1, 0); */
>   glVertex3f( 0.9, -0.9, -30.0);
>   glColor4f(0.5,0,0,0.5); 
>/*    glTexCoord2f(1, 1); */
>   glVertex3f( 0.9,  0.9, -30.0);
>   glColor4f(0,0.5,0,0.5); 
>/*    glTexCoord2f(0, .5); */
>   glVertex3f(-0.9,  0.0, -30.0);
>   glEnd();
>
>   glFlush();
>}
>
>
>int main(int argc, char **argv)
>{
>    GLenum type;
>
>    glutInit(&argc, argv);
>
>
>
>    glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
>
>    type = GLUT_RGB;
>    type |= GLUT_SINGLE;
>    glutInitDisplayMode(type);
>
>    if (glutCreateWindow("First Tri") == GL_FALSE) {
>	exit(1);
>    }
>
>    glewInit();
>
>    Init();
>
>    glutReshapeFunc(Reshape);
>    glutKeyboardFunc(Key);
>    glutDisplayFunc(Draw);
>    glutMainLoop();
>	return 0;
>}

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