GLuint
ShaderAPITest::make_program(const char *vs_src, const char *fs_src)
{
GLuint id, vs, fs;
assert_no_error();
id = glCreateProgram_func();
if (vs_src) {
vs = make_shader(GL_VERTEX_SHADER, vs_src);
glAttachShader_func(id, vs);
glDeleteShader_func(vs);
}
if (fs_src) {
fs = make_shader(GL_FRAGMENT_SHADER, fs_src);
glAttachShader_func(id, fs);
glDeleteShader_func(fs);
}
glLinkProgram_func(id);
check_link_status(id);
glUseProgram_func(id);
glDeleteProgram_func(id);
assert_no_error();
return id;
}
static void
Init(void)
{
const char *version;
GLint i;
version = (const char *) glGetString(GL_VERSION);
if (version[0] != '2' || version[1] != '.') {
printf("Warning: this program expects OpenGL 2.0\n");
/*exit(1);*/
}
GetExtensionFuncs();
vertShader = glCreateShader_func(GL_VERTEX_SHADER);
ReadShader(vertShader, VertProgFile);
fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
ReadShader(fragShader, FragProgFile);
program = glCreateProgram_func();
glAttachShader_func(program, fragShader);
glAttachShader_func(program, vertShader);
glLinkProgram_func(program);
CheckLink(program);
glUseProgram_func(program);
for (i = 0; Uniforms[i].name; i++) {
Uniforms[i].location
= glGetUniformLocation_func(program, Uniforms[i].name);
printf("Uniform %s location: %d\n", Uniforms[i].name,
Uniforms[i].location);
switch (Uniforms[i].size) {
case 1:
glUniform1fv_func(Uniforms[i].location, 1, Uniforms[i].value);
break;
case 2:
glUniform2fv_func(Uniforms[i].location, 1, Uniforms[i].value);
break;
case 3:
glUniform3fv_func(Uniforms[i].location, 1, Uniforms[i].value);
break;
case 4:
glUniform4fv_func(Uniforms[i].location, 1, Uniforms[i].value);
break;
default:
abort();
}
}
assert(glGetError() == 0);
glClearColor(0.4f, 0.4f, 0.8f, 0.0f);
printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
assert(glIsProgram_func(program));
assert(glIsShader_func(fragShader));
assert(glIsShader_func(vertShader));
glColor3f(1, 0, 0);
}
static void
Init(void)
{
static const char *fragShaderText =
"uniform vec4 diffuse;\n"
"uniform vec4 specular;\n"
"varying vec3 normal;\n"
"void main() {\n"
" // Compute dot product of light direction and normal vector\n"
" float dotProd = max(dot(gl_LightSource[0].position.xyz, \n"
" normalize(normal)), 0.0);\n"
" // Compute diffuse and specular contributions\n"
" gl_FragColor = diffuse * dotProd + specular * pow(dotProd, 20.0);\n"
"}\n";
static const char *vertShaderText =
"varying vec3 normal;\n"
"void main() {\n"
" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
" normal = gl_NormalMatrix * gl_Normal;\n"
"}\n";
const char *version;
version = (const char *) glGetString(GL_VERSION);
if (version[0] != '2' || version[1] != '.') {
printf("This program requires OpenGL 2.x, found %s\n", version);
exit(1);
}
GetExtensionFuncs();
fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
if (FragProgFile)
ReadShader(fragShader, FragProgFile);
else
LoadAndCompileShader(fragShader, fragShaderText);
vertShader = glCreateShader_func(GL_VERTEX_SHADER);
if (VertProgFile)
ReadShader(vertShader, VertProgFile);
else
LoadAndCompileShader(vertShader, vertShaderText);
program = glCreateProgram_func();
glAttachShader_func(program, fragShader);
glAttachShader_func(program, vertShader);
glLinkProgram_func(program);
CheckLink(program);
glUseProgram_func(program);
uDiffuse = glGetUniformLocation_func(program, "diffuse");
uSpecular = glGetUniformLocation_func(program, "specular");
uTexture = glGetUniformLocation_func(program, "texture");
printf("DiffusePos %d SpecularPos %d TexturePos %d\n",
uDiffuse, uSpecular, uTexture);
glUniform4fv_func(uDiffuse, 1, diffuse);
glUniform4fv_func(uSpecular, 1, specular);
/* assert(glGetError() == 0);*/
glUniform1i_func(uTexture, 2); /* use texture unit 2 */
/*assert(glGetError() == 0);*/
if (CoordAttrib) {
int i;
glBindAttribLocation_func(program, CoordAttrib, "coord");
i = glGetAttribLocation_func(program, "coord");
assert(i >= 0);
if (i != CoordAttrib) {
printf("Hmmm, NVIDIA bug?\n");
CoordAttrib = i;
}
else {
printf("Mesa bind attrib: coord = %d\n", i);
}
}
/*assert(glGetError() == 0);*/
glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHT0);
glEnable(GL_LIGHTING);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diffuse);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 20.0f);
MakeSphere();
MakeRect();
CurList = SphereList;
#if TEXTURE
MakeTexture();
#endif
printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
printf("Press p to toggle between per-pixel and per-vertex lighting\n");
/* test glGetShaderSource() */
if (0) {
GLsizei len = strlen(fragShaderText) + 1;
GLsizei lenOut;
GLchar *src =(GLchar *) malloc(len * sizeof(GLchar));
glGetShaderSource_func(fragShader, 0, NULL, src);
glGetShaderSource_func(fragShader, len, &lenOut, src);
assert(len == lenOut + 1);
assert(strcmp(src, fragShaderText) == 0);
free(src);
}
assert(glIsProgram_func(program));
assert(glIsShader_func(fragShader));
assert(glIsShader_func(vertShader));
glColor3f(1, 0, 0);
/* for testing state vars */
{
static GLfloat fc[4] = { 1, 1, 0, 0 };
static GLfloat amb[4] = { 1, 0, 1, 0 };
glFogfv(GL_FOG_COLOR, fc);
glLightfv(GL_LIGHT1, GL_AMBIENT, amb);
}
#if 0
TestFunctions();
#else
(void) TestFunctions;
#endif
}