bool initMax()
{
GLint MaxVertexAttribs(0);
glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &MaxVertexAttribs);
//GL_MAX_DRAW_BUFFERS 8
//GL_MAX_COLOR_ATTACHMENTS 8
GLint MaxVertexOutput(0);
glGetIntegerv(GL_MAX_VERTEX_OUTPUT_COMPONENTS, &MaxVertexOutput);
GLint MaxControlInput(0);
glGetIntegerv(GL_MAX_TESS_CONTROL_INPUT_COMPONENTS, &MaxControlInput);
GLint MaxControlOutput(0);
glGetIntegerv(GL_MAX_TESS_CONTROL_OUTPUT_COMPONENTS, &MaxControlOutput);
GLint MaxControlTotalOutput(0);
glGetIntegerv(GL_MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS, &MaxControlTotalOutput);
GLint MaxEvaluationInput(0);
glGetIntegerv(GL_MAX_TESS_EVALUATION_INPUT_COMPONENTS, &MaxEvaluationInput);
GLint MaxEvaluationOutput(0);
glGetIntegerv(GL_MAX_TESS_EVALUATION_OUTPUT_COMPONENTS, &MaxEvaluationOutput);
GLint MaxGeometryInput(0);
glGetIntegerv(GL_MAX_GEOMETRY_INPUT_COMPONENTS, &MaxGeometryInput);
GLint MaxGeometryOutput(0);
glGetIntegerv(GL_MAX_GEOMETRY_OUTPUT_COMPONENTS, &MaxGeometryOutput);
GLint MaxFragmentInput(0);
glGetIntegerv(GL_MAX_FRAGMENT_INPUT_COMPONENTS, &MaxFragmentInput);
return true;
}
bool
WebGLContext::ValidateAttribIndex(GLuint index, const char* info)
{
bool valid = (index < MaxVertexAttribs());
if (!valid) {
if (index == GLuint(-1)) {
ErrorInvalidValue("%s: -1 is not a valid `index`. This value"
" probably comes from a getAttribLocation()"
" call, where this return value -1 means"
" that the passed name didn't correspond to"
" an active attribute in the specified"
" program.", info);
} else {
ErrorInvalidValue("%s: `index` must be less than"
" MAX_VERTEX_ATTRIBS.", info);
}
}
return valid;
}
