Attachment 11147 Details for Bug 12020 – test case

test case

depthtexture.c (text/plain), 2.19 KB, created by WuNian on 2007-08-15 18:41:05 UTC

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Creator: WuNian

Created: 2007-08-15 18:41:05 UTC

Size: 2.19 KB

patch

obsolete

>#include <GL/glut.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <math.h>
>
>#define WINDSIZEX 100
>#define WINDSIZEY 100
>
>
>void init(void)
>{
>   glDisable(GL_DITHER);
>   glClearColor(0.0, 0.0, 0.0, 1.0);
>}
>
>static void TextureTest()
>{
>   unsigned char t[] = {127, 63};
>   GLuint texID;
>
>   glGenTextures(1, &texID);
>   glBindTexture(GL_TEXTURE_1D, texID);
>
>   glEnable(GL_TEXTURE_1D);
>
>   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
>   glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
>   glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
>   glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
>   glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
>
>   glTexParameteri(GL_TEXTURE_1D, GL_DEPTH_TEXTURE_MODE, GL_ALPHA);//GL_LUMINANCE
>   glTexImage1D(GL_TEXTURE_1D, 0, GL_DEPTH_COMPONENT, 2, 0,
>	 GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, (void*)t);
>
>
>   glBegin(GL_QUAD_STRIP);
>   glTexCoord2f(0.25, 0.25);
>   glVertex2i(25, 25);
>   glTexCoord2f(0.25, 0.75);
>   glVertex2i(25, 75);
>   glTexCoord2f(0.75, 0.25);
>   glVertex2i(75, 25);
>   glTexCoord2f(0.75, 0.75);
>   glVertex2i(75, 75);
>   glEnd();
>
>   glDisable(GL_TEXTURE_1D);
>}
>
>static void test(void)
>{    
>   GLfloat buf[4];
>
>   glClear(GL_COLOR_BUFFER_BIT);
>   glColor3f(1.0, 1.0, 1.0);
>
>   TextureTest();
>
>   glReadPixels(35, 50, 1, 1, GL_RGBA, GL_FLOAT, buf);
>   printf("draw pixel at (35, 50): %f %f %f %f, the alpha component should be 0.5\n", buf[0], buf[1], buf[2], buf[3]);
>
>   glReadPixels(65, 50, 1, 1, GL_RGBA, GL_FLOAT, buf);
>   printf("draw pixel at (65, 50): %f %f %f %f, the alpha component should be 0.25\n", buf[0], buf[1], buf[2], buf[3]);
>}
>
>void display(void)
>{
>   glViewport(0, 0, WINDSIZEX, WINDSIZEY);
>   glMatrixMode(GL_PROJECTION);
>   glLoadIdentity();
>   gluOrtho2D(0, WINDSIZEX, 0, WINDSIZEY);
>   glMatrixMode(GL_MODELVIEW);
>   glLoadIdentity();
>
>   test();
>}
>
>int main(int argc, char** argv)
>{
>   glutInit(&argc, argv);
>   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); // | GLUT_DEPTH);
>   glutInitWindowSize(WINDSIZEX, WINDSIZEY);
>   glutInitWindowPosition(100, 100);
>   glutCreateWindow(argv[0]);
>   init();
>   glutDisplayFunc(display);
>   glutMainLoop();
>   return 0; 
>
>}

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Attachments on bug 12020: 11147

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