+++ /dev/null
-/**
- * Test linking of multiple compilation units.
- * Brian Paul
- * 28 March 2009
- */
-
-#include <assert.h>
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <GL/glew.h>
-#include <GL/glut.h>
-#include "shaderutil.h"
-
-
-static GLfloat diffuse[4] = { 0.5f, 1.0f, 0.5f, 1.0f };
-static GLfloat specular[4] = { 0.8f, 0.8f, 0.8f, 1.0f };
-static GLfloat lightPos[4] = { 0.0f, 10.0f, 20.0f, 0.0f };
-static GLfloat delta = 1.0f;
-
-static GLuint VertShader1;
-static GLuint VertShader2;
-static GLuint FragShader1;
-static GLuint FragShader2;
-static GLuint Program;
-
-static GLint uDiffuse;
-static GLint uSpecular;
-static GLint uTexture;
-
-static GLint Win = 0;
-static GLboolean anim = GL_TRUE;
-
-
-
-static const char *FragShaderSource1 =
- "float compute_dotprod(const vec3 normal) \n"
- "{ \n"
- " float dotProd = max(dot(gl_LightSource[0].position.xyz, \n"
- " normalize(normal)), 0.0); \n"
- " return dotProd; \n"
- "} \n";
-
-static const char *FragShaderSource2 =
- "uniform vec4 diffuse;\n"
- "uniform vec4 specular;\n"
- "varying vec3 normal;\n"
- "\n"
- "// external function \n"
- "float compute_dotprod(const vec3 normal); \n"
- "\n"
- "void main() \n"
- "{ \n"
- " float dotProd = compute_dotprod(normal); \n"
- " gl_FragColor = diffuse * dotProd + specular * pow(dotProd, 20.0); \n"
- "} \n";
-
-
-static const char *VertShaderSource1 =
- "vec3 compute_normal() \n"
- "{ \n"
- " return gl_NormalMatrix * gl_Normal; \n"
- "} \n";
-
-static const char *VertShaderSource2 =
- "varying vec3 normal;\n"
- "\n"
- "// external function \n"
- "vec3 compute_normal(); \n"
- "\n"
- "void main() \n"
- "{ \n"
- " gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; \n"
- " normal = compute_normal(); \n"
- "} \n";
-
-
-static void
-normalize(GLfloat *dst, const GLfloat *src)
-{
- GLfloat len = sqrt(src[0] * src[0] + src[1] * src[1] + src[2] * src[2]);
- dst[0] = src[0] / len;
- dst[1] = src[1] / len;
- dst[2] = src[2] / len;
- dst[3] = src[3];
-}
-
-
-static void
-Redisplay(void)
-{
- GLfloat vec[4];
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- /* update light position */
- normalize(vec, lightPos);
- glLightfv(GL_LIGHT0, GL_POSITION, vec);
-
- glutSolidSphere(2.0, 10, 5);
-
- glutSwapBuffers();
-}
-
-
-static void
-Idle(void)
-{
- lightPos[0] += delta;
- if (lightPos[0] > 25.0f || lightPos[0] < -25.0f)
- delta = -delta;
- glutPostRedisplay();
-}
-
-
-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(0.0f, 0.0f, -15.0f);
-}
-
-
-static void
-CleanUp(void)
-{
- glDeleteShader(VertShader1);
- glDeleteShader(VertShader2);
- glDeleteShader(FragShader1);
- glDeleteShader(FragShader2);
- glDeleteProgram(Program);
- glutDestroyWindow(Win);
-}
-
-
-static void
-Key(unsigned char key, int x, int y)
-{
- (void) x;
- (void) y;
-
- switch(key) {
- case ' ':
- case 'a':
- anim = !anim;
- if (anim)
- glutIdleFunc(Idle);
- else
- glutIdleFunc(NULL);
- break;
- case 'x':
- lightPos[0] -= 1.0f;
- break;
- case 'X':
- lightPos[0] += 1.0f;
- break;
- case 27:
- CleanUp();
- exit(0);
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void
-CheckLink(GLuint prog)
-{
- GLint stat;
- glGetProgramiv(prog, GL_LINK_STATUS, &stat);
- if (!stat) {
- GLchar log[1000];
- GLsizei len;
- glGetProgramInfoLog(prog, 1000, &len, log);
- fprintf(stderr, "Linker error:\n%s\n", log);
- }
-}
-
-
-static void
-Init(void)
-{
- if (!ShadersSupported())
- exit(1);
-
- printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
-
- VertShader1 = CompileShaderText(GL_VERTEX_SHADER, VertShaderSource1);
- VertShader2 = CompileShaderText(GL_VERTEX_SHADER, VertShaderSource2);
- FragShader1 = CompileShaderText(GL_FRAGMENT_SHADER, FragShaderSource1);
- FragShader2 = CompileShaderText(GL_FRAGMENT_SHADER, FragShaderSource2);
-
- Program = glCreateProgram();
- glAttachShader(Program, VertShader1);
- glAttachShader(Program, VertShader2);
- glAttachShader(Program, FragShader1);
- glAttachShader(Program, FragShader2);
-
- glLinkProgram(Program);
-
- CheckLink(Program);
-
- glUseProgram(Program);
-
- uDiffuse = glGetUniformLocation(Program, "diffuse");
- uSpecular = glGetUniformLocation(Program, "specular");
- uTexture = glGetUniformLocation(Program, "texture");
- printf("DiffusePos %d SpecularPos %d TexturePos %d\n",
- uDiffuse, uSpecular, uTexture);
-
- glUniform4fv(uDiffuse, 1, diffuse);
- glUniform4fv(uSpecular, 1, specular);
-
- glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
- glEnable(GL_DEPTH_TEST);
-
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diffuse);
- glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);
- glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 10.0f);
-
- assert(glIsProgram(Program));
- assert(glIsShader(VertShader1));
- assert(glIsShader(VertShader2));
- assert(glIsShader(FragShader1));
- assert(glIsShader(FragShader2));
-
- glColor3f(1, 0, 0);
-}
-
-
-int
-main(int argc, char *argv[])
-{
- glutInit(&argc, argv);
- glutInitWindowSize(300, 300);
- glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
- Win = glutCreateWindow(argv[0]);
- glewInit();
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutDisplayFunc(Redisplay);
- if (anim)
- glutIdleFunc(Idle);
- Init();
- glutMainLoop();
- return 0;
-}
-
-
projects / mesa.git / blobdiff