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#include <mbgl/geometry/vao.hpp>
#include <mbgl/platform/log.hpp>
#include <mbgl/util/string.hpp>
namespace mbgl {
VertexArrayObject::~VertexArrayObject() {
if (!gl::DeleteVertexArrays) return;
if (vao) {
gl::DeleteVertexArrays(1, &vao);
}
}
void VertexArrayObject::bindVertexArrayObject() {
if (!gl::GenVertexArrays || !gl::BindVertexArray) {
static bool reported = false;
if (!reported) {
Log::Warning(Event::OpenGL, "Not using Vertex Array Objects");
reported = true;
}
return;
}
if (!vao) {
gl::GenVertexArrays(1, &vao);
}
gl::BindVertexArray(vao);
}
void VertexArrayObject::verifyBinding(Shader &shader, GLuint vertexBuffer, GLuint elementsBuffer,
char *offset) {
if (bound_shader != shader.getID()) {
throw std::runtime_error(std::string("trying to rebind VAO to another shader from " +
util::toString(bound_shader) + "(" + bound_shader_name + ") to " +
util::toString(shader.getID()) + "(" + shader.name + ")" ));
} else if (bound_offset != offset) {
throw std::runtime_error("trying to bind VAO to another offset");
} else if (bound_vertex_buffer != vertexBuffer) {
throw std::runtime_error("trying to bind VAO to another vertex buffer");
} else if (bound_elements_buffer != elementsBuffer) {
throw std::runtime_error("trying to bind VAO to another elements buffer");
}
}
void VertexArrayObject::storeBinding(Shader &shader, GLuint vertexBuffer, GLuint elementsBuffer,
char *offset) {
bound_shader = shader.getID();
bound_shader_name = shader.name;
bound_offset = offset;
bound_vertex_buffer = vertexBuffer;
bound_elements_buffer = elementsBuffer;
}
}
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