Attachment 9254 Details for Bug 10370 – the test case

the test case

btex_displist.c (text/plain), 3.56 KB, created by Wei Wang on 2007-03-21 21:52:46 UTC

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Creator: Wei Wang

Created: 2007-03-21 21:52:46 UTC

Size: 3.56 KB

patch

obsolete

>#include "GL/glut.h"
>#include <string.h>
>#include <stdio.h>
>#include <unistd.h>
>#include <stdlib.h>
>
>#define WIN_WIDTH 128
>#define WIN_HEIGHT 128
>#define BITMAP_WIDTH 1
>#define BITMAP_HEIGHT 1
>#define ALIGN 1
>GLfloat read_buf[4 * BITMAP_WIDTH * BITMAP_HEIGHT];
>static GLfloat r_map[] = { 0, 1 };
>static GLfloat g_map[] = { 0, 0 };
>static GLfloat b_map[] = { 1, 0 };
>static GLfloat a_map[] = { 1, 1 };
>static GLubyte data[] = { 0x8f, 0xff, 0x7f, 0x70 };
>
>static GLuint tex_name;
>
>void init()
>{
>	int i, j;
>
>	glMatrixMode(GL_PROJECTION);
>	glLoadIdentity();
>	glTranslatef(-1.0, -1.0, 0.0);
>	glScalef(2.0/WIN_WIDTH, 2.0/WIN_HEIGHT, 1.0);
>
>	glDisable(GL_DITHER);
>	glClearColor(1, 1, 1, 1);
>	glBlendFunc(GL_SRC_ALPHA, GL_ZERO);
>
>	glPixelMapfv(GL_PIXEL_MAP_I_TO_R, 2, r_map);
>	glPixelMapfv(GL_PIXEL_MAP_I_TO_G, 2, g_map);
>	glPixelMapfv(GL_PIXEL_MAP_I_TO_B, 2, b_map);
>	glPixelMapfv(GL_PIXEL_MAP_I_TO_A, 2, a_map);
>
>	glPixelTransferi(GL_MAP_COLOR, GL_FALSE);
>
>	glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
>	glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
>	glPixelStorei(GL_UNPACK_ALIGNMENT, ALIGN);
>
>	glGenTextures(1, &tex_name);
>	glBindTexture(GL_TEXTURE_2D, tex_name);
>
>	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
>	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
>	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
>}
>
>
>
>void display()
>{
>	int i, j, k, pixel;
>	GLubyte zero_data = 0;
>
>	memset(read_buf, 0xff, sizeof(read_buf));	//reset
>
>	for (k = 0; k < (sizeof(data)/sizeof(GLubyte)); k ++) {
>
>	glClear(GL_COLOR_BUFFER_BIT);
>	glNewList(1, GL_COMPILE_AND_EXECUTE);
>		glEnable(GL_TEXTURE_2D);
>		glBindTexture(GL_TEXTURE_2D, tex_name);
>
>		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 
>			BITMAP_WIDTH, BITMAP_HEIGHT, 0,
>			GL_COLOR_INDEX, GL_BITMAP, &data[k]);
>
>		glBegin(GL_POLYGON);
>		glTexCoord2f(0,0); glVertex2f(0, 0);
>		glTexCoord2f(1,0); glVertex2f(BITMAP_WIDTH, 0);
>		glTexCoord2f(1,1); glVertex2f(BITMAP_WIDTH, BITMAP_HEIGHT);
>		glTexCoord2f(0,1); glVertex2f(0, BITMAP_HEIGHT);
>		glEnd();
>		glDisable(GL_TEXTURE_2D);
>	glEndList();
>	glFlush();
>
>	glReadPixels(0, 0, BITMAP_WIDTH, BITMAP_HEIGHT, 
>		GL_RGBA, GL_FLOAT, read_buf);
>
>	printf("data[0x%x], ", data[k]);
>	if (data[k] & 0x80) {
>		printf("foreground: expected RGBA (%1.1f, %1.1f %1.1f %1.1f)\n",
>			r_map[1], g_map[1], b_map[1], a_map[1]);
>	} else {
>		printf("background: expected RGBA (%1.1f, %1.1f %1.1f %1.1f)\n",
>			r_map[0], g_map[0], b_map[0], a_map[0]);
>	}
>
>	printf("First execution, Readback RGBA:\n");
>	for (i = 0; i < BITMAP_HEIGHT; i ++) {
>		for (j = 0; j < BITMAP_WIDTH; j ++) {
>			pixel = j + i*BITMAP_WIDTH;
>			printf("pixel[%d, %d]: %1.1f %1.1f %1.1f %1.1f\n", j, i,
>				read_buf[pixel*4], read_buf[pixel*4+1], 
>				read_buf[pixel*4+2], read_buf[pixel*4+3]);
>		}
>	}
>
>	/* 2nd time execution from call list */
>	glCallList(1);
>	glDeleteLists(1,1);
>
>	memset(read_buf, 0xff, sizeof(read_buf));	//reset
>	glReadPixels(0, 0, BITMAP_WIDTH, BITMAP_HEIGHT, 
>		GL_RGBA, GL_FLOAT, read_buf);
>
>	printf("CallList execution, Readback RGBA:\n");
>	for (i = 0; i < BITMAP_HEIGHT; i ++) {
>		for (j = 0; j < BITMAP_WIDTH; j ++) {
>			pixel = j + i*BITMAP_WIDTH;
>			printf("pixel[%d, %d]: %1.1f %1.1f %1.1f %1.1f\n", j, i,
>				read_buf[pixel*4], read_buf[pixel*4+1], 
>				read_buf[pixel*4+2], read_buf[pixel*4+3]);
>		}
>	}
>	printf("------------------------------------\n");
>	}	//end for(k)
>
>}
>
>
>int main(int argc, char**argv)
>{
>	glutInit(&argc, argv);
>	glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
>	glutInitWindowSize (WIN_WIDTH, WIN_HEIGHT);
>	glutInitWindowPosition (100, 100);
>	glutCreateWindow ("hello");
>	init();
>	glutDisplayFunc(display);
>	glutMainLoop();
>}

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Attachments on bug 10370: 9254

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