Attachment 57508 Details for Bug 46204 – The testcase I wrote to test pointcoord

[patch] The testcase I wrote to test pointcoord

pointcoord.c (text/plain), 3.48 KB, created by Yuanhan Liu on 2012-02-23 01:41:53 UTC

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Creator: Yuanhan Liu

Created: 2012-02-23 01:41:53 UTC

Size: 3.48 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <GL/glut.h>
>
>static const char *vs = 
>"attribute vec4 vPosition;\n"
>"uniform float uPointSize;\n"
>"void main()\n"
>"{\n"
>"	gl_Position = vec4(0.0, 0.0, 0.0, 1.0);\n"
>"}\n";
>
>static const char *ps =
>"#version 120\n"
>"void main()\n"
>"{\n"
>"	gl_FragColor = vec4(gl_PointCoord.x, gl_PointCoord.y, 0, 1);\n"
>"}\n";
>
>static GLuint shader_stuff()
>{
>	GLuint shaderProgram;
>	GLuint vertexShader, fragmentShader;
>
>	char buf[4096];
>	int len;
>	GLuint link_status;
>
>	vertexShader = glCreateShader(GL_VERTEX_SHADER);
>	fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
>
>	glShaderSource(vertexShader, 1, &vs, NULL);
>	glShaderSource(fragmentShader, 1, &ps, NULL);
>
>	glCompileShader(vertexShader);
>	glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &link_status);
>	if (link_status == 0) {
>		printf("compile vertex shader failed!\n");
>
>		glGetShaderInfoLog(vertexShader, sizeof(buf), &len, buf);
>		printf("%s\n", buf);
>	}
>
>
>	glCompileShader(fragmentShader);
>	glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &link_status);
>	if (link_status == 0) {
>		printf("compile fragment shader failed!\n");
>
>		glGetShaderInfoLog(fragmentShader, sizeof(buf), &len, buf);
>		printf("%s\n", buf);
>	}
>
>	shaderProgram = glCreateProgram();
>
>	glAttachShader(shaderProgram, vertexShader);
>	glAttachShader(shaderProgram, fragmentShader);
>
>
>	/*
>	 * here bind  vPosition
>	 */
>	glBindAttribLocation(shaderProgram, 0, "vPosition");
>
>	glLinkProgram(shaderProgram);
>
>	glGetProgramiv(shaderProgram, GL_LINK_STATUS, &link_status);
>	if (link_status == 0) {
>		printf("Link failed!\n");
>
>		glGetProgramInfoLog(shaderProgram, sizeof(buf), &len, buf);
>		printf("%s\n", buf);
>
>		exit(1);
>	}
>
>
>	return shaderProgram;
>}
>
>int use_fbo =  0;
>
>void myDisplay(void)
>{							
>	GLuint point_size_loc;
>	GLuint program;
>	GLubyte pixels[100 * 100 * 4];
>
>	static int called = 0;
>	if (called)
>		return;
>	called = 1;
>
>
>	if (1) {
>		GLuint vbo;
>		GLuint fbo;
>		GLfloat vertices[] = {
>			0, 0,
>		};
>
>		if (use_fbo) {
>			GLuint color_buffer;
>			GLuint depth_buffer;
>
>			glGenRenderbuffers(1, &color_buffer);
>			glGenRenderbuffers(1, &depth_buffer);
>			glBindRenderbuffer(GL_RENDERBUFFER, color_buffer);
>			glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA, 100, 100);
>
>			glBindRenderbuffer(GL_RENDERBUFFER, depth_buffer);
>			glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, 100, 100);
>
>			glGenFramebuffers(1, &fbo);
>			glBindFramebuffer(GL_FRAMEBUFFER, fbo);
>			glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, color_buffer);
>			glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth_buffer);
>		}
>
>		glClearColor(0, 0, 0, 1);
>		glClear(GL_COLOR_BUFFER_BIT);
>
>		program = shader_stuff();
>		glUseProgram(program);
>
>
>		glEnable(GL_POINT_SPRITE_ARB);
>		glPointSize(50);
>		glBegin(GL_POINTS);
>			glVertex2f(0.0, 0.0);
>		glEnd();
>
>		if (use_fbo) {
>			glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
>			glReadPixels(0, 0, 100, 100, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
>		}
>	}
>
>	if (use_fbo) {
>		glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
>		
>		glDrawPixels(100, 100, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
>		//glBlitFramebuffer(0,0,100,100,0,0,100,100,GL_COLOR_BUFFER_BIT,GL_NEAREST); 
>	}
>
>	glFlush();
>}
>
>int main(int argc,char** argv)
>{
>	glutInit(&argc,argv);
>	glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
>	glutInitWindowSize(100, 100);
>	glutInitWindowPosition(100,100);
>	glutCreateWindow("point-coord");
>	glutDisplayFunc(myDisplay);
>
>	if (argv[1] && strcmp(argv[1], "--use-fbo") == 0)
>		use_fbo = 1;
>	glutMainLoop();
>	return 0;
>}

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Attachments on bug 46204: 57508

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